BELFB / Bel Fuse Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE INC.

Amendment to Registrant's Code of Ethics, or Waiver of a Provision of the Code of Ethics, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 24, 2025 BELFUSE INC /NJ BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission F

Bel Reports Second Quarter and First Half 2025 Results

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Reports Second Quarter and First Half 2025 Results WEST ORANGE, NJ, Thursday, July 24, 2025- Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the second quarter and first half of 2025. Second Quarter 2025 Highlights • Net

Bel Fuse Inc. Code of Ethics Adopted February 11, 2004 Updated October 24, 2007 Updated February 9, 2011 Updated July 28, 2015 Updated November 1, 2017 Updated November 1, 2018 Updated August 1, 2019 Updated July 28, 2021 Updated August 3, 2024 Updat

Exhibit 14.1 Bel Fuse Inc. Code of Ethics Adopted February 11, 2004 Updated October 24, 2007 Updated February 9, 2011 Updated July 28, 2015 Updated November 1, 2017 Updated November 1, 2018 Updated August 1, 2019 Updated July 28, 2021 Updated August 3, 2024 Updated July 23, 2025 Table of Contents INTRODUCTION 1 RESPONSIBILITIES TO SHAREHOLDERS 2 Financial Integrity 2 Anti-Money Laundering 2 Inside

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 BEL FUSE INC /NJ FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 30, 2025 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commissio

Conflict Minerals Report of Bel Fuse Inc.

Exhibit 1.01 Bel Fuse Inc. Conflict Minerals Report For the reporting period from January 1, 2024 to December 31, 2024 This Conflict Minerals Report (the "Report") of Bel Fuse Inc. (referred to in this Report as the "Company," "Bel," "we," "us," or "our") for the reporting period from January 1, 2024 to December 31, 2024 (the "Reporting Period") has been prepared pursuant to Rule 13p-1 and Form SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report BEL FUSE INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report BEL FUSE INC. (Exact name of registrant as specified in its charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 300 Executive Drive, Suite 300, West Orange, New Jersey 07052 (Address of principal executive offices)

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

BEL FUSE INC /NJ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 27, 2025 BEL FUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commissio

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 BEL FUSE INC /NJ FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 20, 2025 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission

Employment Agreement, dated as of May 20, 2025, by and between Bel Fuse Inc. and Lynn Hutkin.

Exhibit 10.1 EMPLOYMENT AGREEMENT This Employment Agreement (the “Agreement”) is made and entered into as of the execution date set forth in Item 1 of Exhibit A hereto, by and between the individual named in Item 2 of Exhibit A (“Executive”) and Bel Fuse, Inc., a New Jersey corporation (the “Company”). WHEREAS, the Company desires to retain Executive in the position set forth in Item 3 of Exhibit

Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 BEL FUSE INC /NJ FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 2, 2025 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission

Conformed Amended and Restated Credit and Security Agreement, dated as of September 2, 2021 (reflecting changes thereto pursuant to First Amendment Agreement dated as of January 12, 2023, Second Amendment Agreement dated as of September 18, 2024, Third Amendment Agreement dated as of November 14, 2024, and Fourth Amendment Agreement dated as of May 2, 2025), by and among Bel Fuse Inc., as the borrower, KeyBank National Association, as administrative agent, swing line lender and issuing lender, and the other lenders identified therein.*

Exhibit 10.2 EXHIBIT A TO FOURTH AMENDMENT AGREEMENT Conformed Credit Agreement reflecting changes pursuant to First Amendment Agreement dated as of January 12, 2023, Second Amendment Agreement dated as of September 18, 2024, Third Amendment Agreement dated as of November 14, 2024 and Fourth Amendment Agreement dated as of May 2, 2025 Published Transaction CUSIP Number: 07734RAE8 Published Revolve

Fourth Amendment Agreement, dated as of May 2, 2025, to Amended and Restated Credit and Security Agreement, dated as of September 2, 2021, by and among Bel Fuse Inc., as the borrower, KeyBank National Association, as administrative agent, swing line lender and issuing lender, and the other lenders identified therein, as amended.

Exhibit 10.1 FOURTH AMENDMENT AGREEMENT This FOURTH AMENDMENT AGREEMENT (this “Amendment”) is made as of the 2nd day of May, 2025 among: (a) BEL FUSE INC., a New Jersey corporation (the “Borrower”); (b) the Existing Revolving Lenders (as hereinafter defined); (c) the New Revolving Lender (as hereinafter defined); and (d) KEYBANK NATIONAL ASSOCIATION, a national banking association, as the administ

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE INC.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): April 24, 2025 BELFUSE INC /NJ BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission

Bel Reports First Quarter 2025 Results

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Reports First Quarter 2025 Results WEST ORANGE, NJ, Thursday, April 24, 2025- Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the first quarter of 2025. First Quarter 2025 Highlights • Net sales of $152.2 million compare

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) ☒ Filed by the Registrant ☐ Filed by a Party other than the Registrant Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as Permitted by Rule 14a-6(e)(2)) ☒ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) ☒ Filed by the Registrant ☐ Filed by a Party other than the Registrant Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 BEL FUSE INC /NJ FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 12, 2025 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission

Subsidiaries of the Registrant.

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT Subsidiary Jurisdiction of Organization Bel Power Solutions Germany GmbH Germany Bel Components Ltd. Hong Kong Bel Connector Inc. Delaware Bel Fuse (Macao Commercial Offshore) Limited Macao Bel Fuse Limited Hong Kong Bel Guangxi Electronics Co. Ltd. PRC Bel Power (Hangzhou) Co. Ltd. PRC Bel Power Europe S.r.l. Italy Bel Power Inc. Massachusetts Bel Power

Bel Fuse Inc. Policy on Insider Trading

Exhibit 19.1 POLICY ON INSIDER TRADING This Policy on Insider Trading (the “Policy”), is designed to prevent insider trading or allegations of insider trading, and to protect Bel Fuse Inc.’s reputation for integrity and ethical conduct. This Policy applies to all directors, officers and employees of Bel Fuse Inc., its subsidiaries and affiliates (collectively, “Bel Fuse”). The Special Trading Proc

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676

Description of Securities.

Exhibit 4.1 Description of Capital Stock Bel Fuse Inc. (the “Company”) is authorized to issue 10,000,000 shares of Class A Common Stock, par value $0.10 per share (the “Class A Common Stock”), and 30,000,000 shares of Class B Common Stock, par value $0.10 per share (the “Class B Common Stock” and, together with the Class A Common Stock, the “Common Stock”). As of January 31, 2025, there were 2,115

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 18, 2025 BELFUSE INC /NJ BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commissi

Bel Reports Fourth Quarter and Full Year 2024 Results

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Reports Fourth Quarter and Full Year 2024 Results WEST ORANGE, NJ, Tuesday, February 18, 2025- Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the fourth quarter and full year of 2024. Fourth Quarter 2024 Highlights • Ne

Israeli Appendix to the Bel Fuse Inc. 2020 Equity Compensation Plan, is incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on February 18, 2025.

Exhibit 10.1 BEL FUSE INC. 2020 EQUITY COMPENSATION PLAN Israeli Appendix 1. GENERAL 1.1 This appendix (the “Appendix”) shall apply only to participants who are residents of the State of Israel or those who are deemed residents of the State of Israel for the purposes of tax payment (the “Israeli Participants”). The provisions specified hereunder shall form an integral part of the Bel Fuse, Inc. 20

Letter Agreement Regarding Transition Services, dated as of February 3, 2025, by and between Bel Fuse Inc. and Daniel Bernstein, is incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on February 7, 2025.

Exhibit 10.2 Mr. Daniel Bernstein Chief Executive Officer Bel Fuse, Inc. 300 Executive Drive, Suite 300 West Orange, New Jersey Dear Dan: Thank you for your careful and considered planning for your transition from Chief Executive Officer (“CEO”) of Bel Fuse, Inc. (the “Company”) to Non-Executive Chairman of the Company’s Board of Directors (the “Board”), to be effective immediately following the 2

Farouq Tuweiq to Succeed Daniel Bernstein as CEO of Bel Fuse Inc. in May 2025

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Farouq Tuweiq to Succeed Daniel Bernstein as CEO of Bel Fuse Inc. in May 2025 WEST ORANGE, N.J., Feb. 03, 2025 (GLOBE NEWSWIRE)—The Board of Directors of Bel Fuse Inc. (Nasdaq: BELFA and BELFB) (“Bel” or the “Company”) today announced an upcoming transition in the C

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 3, 2025 BEL FUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number)

Letter Agreement Regarding Non-Executive Chairman Services, dated as of February 3, 2025, by and between Bel Fuse Inc. and Daniel Bernstein, is incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K filed on February 7, 2025.

Exhibit 10.3 February 3, 2025 Mr. Daniel Bernstein Chief Executive Officer Bel Fuse, Inc. 300 Executive Drive, Suite 300 West Orange, New Jersey Dear Dan, Letter of Appointment The Board of Directors (the “Board”) of Bel Fuse Inc. (the “Company”) is extremely pleased that you have accepted our offer to lead our Board as Non-Executive Chairman of the Board (“Chairman”). In addition, the Board is pl

Amended and Restated Employment Agreement, dated as of February 3, 2025, by and between Bel Fuse Inc. and Farouq Tuweiq, is incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on February 7, 2025.

Exhibit 10.1 AMENDED AND RESTATED EMPLOYMENT AGREEMENT This Amended and Restated Employment Agreement (the “Agreement”) is made and entered into as of February 3, 2025 (the “Agreement Date”), by and between Farouq Tuweiq (the “Executive”) and Bel Fuse, Inc., a New Jersey corporation (the “Company”). WHEREAS, the Company desires to elevate the Executive to the position of Chief Executive Officer an

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 14, 2024 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employ

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

Exhibit 99.3 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION Transaction Background On September 18, 2024, Bel Fuse Inc. (“Bel”, the “Company”, “we”, “us” or “our”) entered into a Share Purchase Agreement, dated as of September 19, 2024 (the “Purchase Agreement”), with Enercon Technologies, Ltd. (“Enercon”), FF3 Holdings, L.P., for itself and as Sellers’ Representative (“FF3”), and ea

ENERCON TECHNOLOGIES LTD UNAUDITED INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS SEPTENBER 30, 2024

Exhibit 99.2 ENERCON TECHNOLOGIES LTD UNAUDITED INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS SEPTENBER 30, 2024 1 ENERCON TECHNOLOGIES LTD UNAUDITED INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS TABLE OF CONTENTS Page INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS OF: Financial Position 3-4 Comprehensive Income 5 Changes in Equity 6-7 Cash Flows 8-9 Notes forming part of the Cons

ENERCON TECHNOLOGIES LTD CONSOLIDATED FINANCIAL STATEMENTS AS OF DECEMBER 31, 2023 ENERCON TECHNOLOGIES LTD CONSOLIDATED FINANCIAL STATEMENTS TABLE OF CONTENTS

Exhibit 99.1 ENERCON TECHNOLOGIES LTD CONSOLIDATED FINANCIAL STATEMENTS AS OF DECEMBER 31, 2023 ENERCON TECHNOLOGIES LTD CONSOLIDATED FINANCIAL STATEMENTS TABLE OF CONTENTS Page INDEPENDENT AUDITORS' REPORT 2-3 CONSOLIDATED FINANCIAL STATEMENTS OF: Financial Position 4-5 Comprehensive Income 6 Changes in Equity 7 Cash Flows 8-9 Notes forming part of the Consolidated Financial Statements 10-41 1 B

Bel Closes Its Previously Announced Acquisition of Enercon Technologies Acquired 80% Stake Upfront with Intent to Purchase Remaining 20% by Early 2027

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Closes Its Previously Announced Acquisition of Enercon Technologies Acquired 80% Stake Upfront with Intent to Purchase Remaining 20% by Early 2027 WEST ORANGE, NJ, Thursday, November 14, 2024 - Bel Fuse Inc. (“Bel,” or, “the Company”) (Nasdaq:BELFA and Nasdaq:BE

Shareholders’ Agreement, dated November 14, 2024, by and among Bel Power Solutions s.r.o., FF3 Holdings, L.P., and Enercon Technologies Ltd.*

Exhibit 10.1 Dated November 14, 2024 Shareholders’ Agreement between Bel Power Solutions s.r.o as Shareholder FF3 Holdings, LP. as Shareholder Enercon Technologies Ltd. as Company 1. Interpretation 1 2. The Business of the Company 7 3. Director Appointments 8 4. Option Protection Matters 8 5. Limited Activities 9 6. Finance 10 7. Shareholder Loans 10 8. Access to Information 11 9. Registration Rig

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 14, 2024

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 14, 2024 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number)

Conformed Amended and Restated Credit and Security Agreement, dated as of September 2, 2021 (reflecting changes thereto pursuant to First Amendment Agreement dated as of January 12, 2023, Second Amendment Agreement dated as of September 18, 2024, and Third Amendment Agreement dated as of November 14, 2024), by and among Bel Fuse Inc., as the borrower, KeyBank National Association, as administrative agent, swing line lender and issuing lender, and the other lenders identified therein*

Exhibit 10.3 EXHIBIT A TO THIRD AMENDMENT AGREEMENT Conformed Credit Agreement reflecting changes pursuant to First Amendment Agreement dated as of January 12, 2023, Second Amendment Agreement dated as of September 18, 2024 and Third Amendment Agreement dated as of November 14, 2024 Published Transaction CUSIP Number: 07734RAE8 Published Revolver CUSIP Number: 07734RAF5 AMENDED AND RESTATED CREDIT

Third Amendment Agreement, dated November 14, 2024, to Amended and Restated Credit and Security Agreement, dated September 2, 2021, by and among Bel Fuse Inc., as the borrower, KeyBank National Association, as administrative agent, swing line lender and issuing lender, and the other lenders identified therein, as amended.

Exhibit 10.2 THIRD AMENDMENT AGREEMENT This THIRD AMENDMENT AGREEMENT (this “Amendment”) is made as of the 14th day of November, 2024 among: (a) BEL FUSE INC., a New Jersey corporation (the “Borrower”); (b) the Lenders, as defined in the Credit Agreement (as hereinafter defined), and KeyBanc Capital Markets Inc., BofA Securities, Inc., BMO Bank N.A. and PNC Capital Markets LLC, as joint lead arran

BELFB / Bel Fuse Inc. - Class B / GAMCO INVESTORS, INC. ET AL Activist Investment

SC 13D/A 1 belfa55.htm SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 55) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of P

BELFB / Bel Fuse Inc. - Class B / GAMCO INVESTORS, INC. ET AL Activist Investment

SC 13D/A 1 belfa54.htm SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 54) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE

Bel Reports Third Quarter 2024 Results Sales and Gross Margin Percentage Above Mid-Point of Expected Ranges Provides Q4-24 Sales and Gross Margin Guidance

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Reports Third Quarter 2024 Results Sales and Gross Margin Percentage Above Mid-Point of Expected Ranges Provides Q4-24 Sales and Gross Margin Guidance WEST ORANGE, NJ, Wednesday, October 23, 2024- Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced prelimina

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 23, 2024 BELFUSE INC /NJ BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commissio

BELFB / Bel Fuse Inc. - Class B / GAMCO INVESTORS, INC. ET AL Activist Investment

SC 13D/A 1 belfa53.htm SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 53) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of P

BELFB / Bel Fuse Inc. - Class B / GAMCO INVESTORS, INC. ET AL Activist Investment

SC 13D/A 1 belfa52.htm SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 52) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of P

Second Amendment Agreement, dated September 18, 2024, to Amended and Restated Credit and Security Agreement, dated as of September 2, 2021, by and among Bel Fuse Inc., as the borrower, KeyBank National Association, as administrative agent, swing line lender and issuing lender, and the other lenders identified therein, as amended

Exhibit 10.2 Execution Version SECOND AMENDMENT AGREEMENT This SECOND AMENDMENT AGREEMENT (this “Amendment”) is made as of the 18th day of September, 2024 among: (a) BEL FUSE INC., a New Jersey corporation (the “Borrower”); (b) the Lenders, as defined in the Credit Agreement (as hereinafter defined), party hereto, which constitute the Required Lenders, as defined in the Credit Agreement; and (c) K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 18, 2024 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number)

Conformed Amended and Restated Credit and Security Agreement, dated as of September 2, 2021 (reflecting changes thereto pursuant to First Amendment Agreement dated as of January 12, 2023 and Second Amendment Agreement dated as of September 18, 2024), by and among Bel Fuse Inc., as the borrower, KeyBank National Association, as administrative agent, swing line lender and issuing lender, and the other lenders identified therein*

Exhibit 10.3 EXHIBIT A TO SECOND AMENDMENT AGREEMENT Conformed Credit Agreement reflecting changes pursuant to First Amendment Agreement dated as of January 12, 2023 and Second Amendment Agreement dated as of September 18, 2024 Published Transaction CUSIP Number: 07734RAE8 Published Revolver CUSIP Number: 07734RAF5 AMENDED AND RESTATED CREDIT AND SECURITY AGREEMENT among BEL FUSE INC. as Borrower

Form of Shareholders’ Agreement, by and among Bel Fuse Inc., FF3 Holdings, L.P., and Enercon Technologies Ltd.*

Exhibit 10.1 Dated [●] 2024 Shareholders’ Agreement between [Bel Fuse Inc.] as Shareholder FF3 Holdings, LP. as Shareholder Enercon Technologies Ltd. as Company Table of Contents Page 1 Interpretation 1 2 The Business of the Company 7 3 Director Appointments 8 4 Option Protection Matters 8 5 Limited Activities 9 6 Finance 10 7 Shareholder Loans 10 8 Access to Information 11 9 Registration Rights 1

Share Purchase Agreement, dated as of September 19, 2024, by and among Bel Fuse Inc., Enercon Technologies Ltd., and the Shareholders of Enercon Technologies Ltd.*

Exhibit 2.1 EXECUTION VERSION SHARE PURCHASE AGREEMENT BY AND AMONG ENERCON TECHNOLOGIES LTD., THE SHAREHOLDERS OF COMPANY, AND THE PURCHASER September 19, 2024 1 TABLE OF CONTENT SHARE PURCHASE AGREEMENT 1 1 DEFINITIONS 6 1.1 Definitions. 6 1.2 Rules of Construction. 25 2 PURCHASE AND SALE 25 2.1 Purchase and Sale of the Purchased Shares. 25 2.2 Purchase Price. 26 2.3 Closing Payment Amount. 26 2

BELFB / Bel Fuse Inc. - Class B / GAMCO INVESTORS, INC. ET AL Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 51) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of Person Authorized to Rec

Bel Announces Agreement to Acquire Enercon Technologies Significantly expands Bel’s presence in the higher-margin Aerospace & Defense markets, enhancing our financial profile, expanding our product portfolio and diversifying our customer base

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Announces Agreement to Acquire Enercon Technologies Significantly expands Bel’s presence in the higher-margin Aerospace & Defense markets, enhancing our financial profile, expanding our product portfolio and diversifying our customer base WEST ORANGE, NJ, Wednes

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 18, 2024 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number)

Investor Presentation Materials, dated September 2024.

Exhibit 99.2

BELFB / Bel Fuse Inc. - Class B / GAMCO INVESTORS, INC. ET AL Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 50) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of Person Authorized to Rec

Bel Fuse Inc. Code of Ethics.

Exhibit 14.1 Bel Fuse Inc. Code of Ethics Adopted February 11, 2004 Updated October 24, 2007 Updated February 9, 2011 Updated July 28, 2015 Updated November 1, 2017 Updated November 1, 2018 Updated August 1, 2019 Updated July 28, 2021 Updated August 3, 2024 Table of Contents INTRODUCTION 1 RESPONSIBILITIES TO SHAREHOLDERS 2 Financial Integrity 2 Anti-Money Laundering 2 Insider Trading 2 Antitrust

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 3, 2024

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 3, 2024 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.

Offer Letter, dated November 27, 2023, and effective July 1, 2024 between Bel Fuse Inc. and Steve Dawson

EX-10.1 2 ex701445.htm EXHIBIT 10.1 Exhibit 10.1 November 27, 2023 Steve Dawson Dear Steve, We are extremely pleased to inform you that you have been chosen to be the President, Bel Power Solutions. You have been selected for this position based on your outstanding performance, technical capability, leadership skills, and dedication to continuously help us grow. We are truly excited by the prospec

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE INC.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 24, 2024 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R

Bel Reports Second Quarter 2024 Results Continued Gross Margin Performance with Sales Above Mid-Point of Expected Range Provides Q3-24 Sales and Gross Margin Guidance

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Reports Second Quarter 2024 Results Continued Gross Margin Performance with Sales Above Mid-Point of Expected Range Provides Q3-24 Sales and Gross Margin Guidance WEST ORANGE, NJ, Wednesday, July 24, 2024- Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced

Bel Announces Retirement of Dennis Ackerman; Steve Dawson Appointed as President of Bel’s Power and Protection Segment

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive, Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Announces Retirement of Dennis Ackerman; Steve Dawson Appointed as President of Bel’s Power and Protection Segment WEST ORANGE, N.J., July 01, 2024 (GLOBE NEWSWIRE) - Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today confirmed consistent with prior

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

BEL FUSE INC /NJ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 1, 2024 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission

Conflict Minerals Report of Bel Fuse Inc.

Exhibit 1.01 Bel Fuse Inc. Conflict Minerals Report For the reporting period from January 1, 2023 to December 31, 2023 This Conflict Minerals Report (the "Report") of Bel Fuse Inc. (referred to in this Report as the "Company," "Bel," "we," "us," or "our") for the reporting period from January 1, 2023 to December 31, 2023 (the "Reporting Period") has been prepared pursuant to Rule 13p-1 and Form SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report BEL FUSE INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report BEL FUSE INC. (Exact name of registrant as specified in its charter) New Jersey 000-11676 (State of incorporation) (Commission File Number) 300 Executive Drive, Suite 300, West Orange, New Jersey 07052 (Address of principal executive offices) (Zip Code) Farouq Tuweiq Chief Financial Office

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 14, 2024 BEL FUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission File Number) (I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE INC.

BELFB / Bel Fuse Inc. - Class B / GAMCO INVESTORS, INC. ET AL Activist Investment

SC 13D/A 1 belfa49.htm SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 49) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of P

Bel Reports First Quarter 2024 Results Sustained Gross Margin Performance with Sales in Expected Range Provides Q2-24 Sales and Gross Margin Guidance

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Reports First Quarter 2024 Results Sustained Gross Margin Performance with Sales in Expected Range Provides Q2-24 Sales and Gross Margin Guidance WEST ORANGE, NJ, Thursday, April 25, 2024- Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary finan

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): April 25, 2024 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.

BELFB / Bel Fuse Inc. - Class B / BROWN ADVISORY INC - BROWN ADVISORY INC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 BEL FUSE INC. (Name of Issuer) (Title of Class of Securities) 077347300 (CUSIP Number) March 31, 2024 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [X] Rule 13d-1(b) [ ] Rul

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as Permitted by Rule 14a-6(e)(2)) ☒ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

Subsidiaries of the Registrant.

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT Subsidiary Jurisdiction of Organization Bel Power Solutions Germany GmbH Germany Bel Components Ltd. Hong Kong Bel Connector Inc. Delaware Bel Fuse (Macao Commercial Offshore) Limited Macao Bel Fuse Limited Hong Kong Bel Guangxi Electronics Co. Ltd. PRC Bel Power (Hangzhou) Co. Ltd. PRC Bel Power Europe S.r.l. Italy Bel Power Inc. Massachusetts Bel Power

Bel Fuse Inc. Compensation Recovery Policy.

Exhibit 97.1 BEL FUSE INC. COMPENSATION RECOVERY POLICY (Adopted and approved on October 25, 2023) 1. Purpose Bel Fuse Inc. (collectively with its subsidiaries, the “Company”) is committed to promoting high standards of honest and ethical business conduct and compliance with applicable laws, rules and regulations. As part of this commitment, the Company has adopted this Compensation Recovery Polic

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 1, 2024 BEL FUSE INC. (Exac

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 1, 2024 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer I

Bel Director John Tweedy to Retire from the Board and Not Stand for Re-election at the 2024 Annual Meeting Bel plans to nominate David Valletta to join the Board, Former Executive Vice President of Worldwide Sales at Vishay Intertechnology

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive, Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Director John Tweedy to Retire from the Board and Not Stand for Re-election at the 2024 Annual Meeting Bel plans to nominate David Valletta to join the Board, Former Executive Vice President of Worldwide Sales at Vishay Intertechnology WEST ORA

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events

BEL FUSE INC /NJ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 1, 2024 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commissio

Press Release issued by Bel Fuse Inc., dated March 7, 2024.

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive, Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Director John Tweedy to Retire from the Board and Not Stand for Re-election at the 2024 Annual Meeting Bel plans to nominate David Valletta to join the Board, Former Executive Vice President of Worldwide Sales at Vishay Intertechnology WEST ORA

Bel Reports Fourth Quarter and Full Year 2023 Results Announces New $25 Million Share Repurchase Program

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Reports Fourth Quarter and Full Year 2023 Results Announces New $25 Million Share Repurchase Program WEST ORANGE, NJ, Wednesday, February 21, 2024 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the fourth quarter and

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 21, 2024 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number)

BELFB / Bel Fuse Inc. - Class B / Portolan Capital Management, LLC - SC 13G/A Passive Investment

SC 13G/A 1 tm246171d1sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d –1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d–2. (Amendment No. 1 )* Bel Fuse Inc. (Name of Issuer) Class B Common Stock (Title of Class of Securities) 077347300 (CUSIP Number) Dece

BELFB / Bel Fuse Inc. - Class B / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1)* Name of issuer: Bel Fuse Inc. Class B Title of Class of Securities: Common Stock CUSIP Number: 077347300 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Bel Announces a New President of the Power and Protection Segment

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive, Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Announces a New President of the Power and Protection Segment WEST ORANGE, N.J., January 16, 2024 (GLOBE NEWSWIRE) - Bel Fuse Inc. (Nasdaq: BELFA and BELFB), a leading global manufacturer of products that power, protect, and connect electronic

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 16, 2024

BEL FUSE INC /NJ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 16, 2024 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commis

BELFB / Bel Fuse Inc. - Class B / TETON WESTWOOD FUNDS Passive Investment

SC 13G/A 1 belfa13g09.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 9)* Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) December 31, 2023 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rul

BELFB / Bel Fuse Inc. - Class B / GAMCO INVESTORS, INC. ET AL Activist Investment

SC 13D/A 1 belfa48.htm SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 48) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES -12-31 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 25, 2023 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Nu

Bel Reports Third Quarter 2023 Results Continuous Financial Discipline Leads to Another Quarter of Impressive Results

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Reports Third Quarter 2023 Results Continuous Financial Discipline Leads to Another Quarter of Impressive Results WEST ORANGE, NJ, Wednesday, October 25, 2023 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the third q

Amended and Restated By-Laws of Bel Fuse Inc. (Adopted October 25, 2023), are incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on October 25, 2023.

Exhibit 3.1 AMENDED AND RESTATED BY-LAWS OF BEL FUSE INC. Adopted October 25, 2023 ARTICLE I OFFICES SECTION 1.01. Principal Office. The principal office of the corporation shall be at 300 Executive Drive, Suite 300, in the Township of West Orange, County of Essex, and State of New Jersey. SECTION 1.02. Other Offices. The corporation may have other offices at such other places, within or without t

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE INC.

Bel Reports Second Quarter 2023 Results Continued Execution Drives Solid Results

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Reports Second Quarter 2023 Results Continued Execution Drives Solid Results WEST ORANGE, NJ, Wednesday, July 26, 2023 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the second quarter of 2023. Second Quarter 2023 Hig

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 25, 2023

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 25, 2023 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 26, 2023

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 26, 2023 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in Charter) New Jersey 000-11676 22-1463699 (State or Other Jurisdiction of incorporation) (Commissi

Bel Announces Sale of Jersey City Building and Relocation of Corporate Headquarters

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Announces Sale of Jersey City Building and Relocation of Corporate Headquarters Jersey City, NJ, June 26, 2023, Bel Fuse Inc. (Nasdaq: BELFA and BELFB), a leading global manufacturer of products that power, protect and connect electronic circuits, today

June 7, 2023

June 7, 2023 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.

Conflict Minerals Report of Bel Fuse Inc.

EX-1.01 2 ex525798.htm EXHIBIT 1.01 Exhibit 1.01 Bel Fuse Inc. Conflict Minerals Report For the reporting period from January 1, 2022 to December 31, 2022 This Conflict Minerals Report (the "Report") of Bel Fuse Inc. (referred to in this Report as the "Company," "Bel," "we," "us," or "our") for the reporting period from January 1, 2022 to December 31, 2022 (the "Reporting Period") has been prepare

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report BEL FUSE INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report BEL FUSE INC. (Exact name of registrant as specified in its charter) New Jersey 000-11676 (State of incorporation) (Commission File Number) 206 Van Vorst Street, Jersey City, New Jersey 07302 (Address of principal executive offices) (Zip Code) Farouq Tuweiq Chief Financial Officer (201) 43

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 23, 2023 BEL FUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission File Number) (I

As filed with the Securities and Exchange Commission on May 10, 2023

As filed with the Securities and Exchange Commission on May 10, 2023 Registration No.

Form of Senior Note (included in Exhibit 4.9)**

Exhibit 4.9 BEL FUSE INC., as Issuer and ●, as Trustee INDENTURE Dated as of ● Senior Debt Securities CROSS REFERENCE SHEET1 Between Provisions of the Trust Indenture Act of 1939 and the Indenture to be dated as of , 20 between BEL FUSE INC. and , as Trustee: Section of the Act Section of Indenture 310(a)(1) and (2) 5.08 310(a)(3) and (4) Inapplicable 310(b) 5.09(a), (b) and (d) 310(c) Inapplicabl

Filing Fee Table**

Exhibit 107 Calculation of Filing Fee Table Form S-3 (Form Type) Bel Fuse Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered (1) Proposed Maximum Offering Price per Unit (2) Maximum Aggregate Offering Price (3) Fee Rate Amount of Registration Fe

Form of Subordinated Note (included in Exhibit 4.10)**

Exhibit 4.10 BEL FUSE INC., as Issuer and ●, as Trustee INDENTURE Dated as of ● Subordinated Debt Securities CROSS REFERENCE SHEET1 Between Provisions of the Trust Indenture Act of 1939 and the Indenture to be dated as of , 20 between BEL FUSE INC. and , as Trustee: Section of the Act Section of Indenture 310(a)(1) and (2) 5.08 310(a)(3) and (4) Inapplicable 310(b) 5.09(a), (b) and (d) 310(c) Inap

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE INC.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): April 26, 2023 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.

Bel Reports First Quarter 2023 Results Continued Momentum with New Records Set

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Reports First Quarter 2023 Results Continued Momentum with New Records Set JERSEY CITY, NJ, Wednesday, April 26, 2023 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the first quarter of 2023. First Quarter 202

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

our proxy statement for our 2023 annual meeting of shareholders, filed with the SEC on April 10, 2023; and

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as Permitted by Rule 14a-6(e)(2)) ☒ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 29, 2023 BEL FUSE INC /NJ

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 29, 2023 BEL FUSE INC /NJ BEL FUSE INC. (Exact name of registrant as specified in its charter) New Jersey 000-11676 22-1463699 (State or other jurisdiction of incorporation) (Co

BELFB / Bel Fuse Inc. - Class B / Portolan Capital Management, LLC - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d –1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d–2. (Amendment No. )* Bel Fuse Inc. (Name of Issuer) Class B Common Stock (Title of Class of Securities) 077347300 (CUSIP Number) March 1, 2023 (Date of Event Which Requires Fil

Offer Letter, dated October 25, 2022, between Bel Fuse Inc. and Suzanne Kozlovsky, is incorporated by reference Exhibit 10.13 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022 filed on March 10, 2023.

Exhibit 10.13 October 25, 2022 Suzanne Kozlovsky Carol Stream, IL 60188 Dear Suzanne, Thank you for your interest in Bel Fuse Inc. We are pleased to confirm our offer of employment to you for the position of Global Head of People for Bel Fuse Inc. under the following terms and conditions: ● This position will report directly to Dan Bernstein, President and CEO of Bel Fuse Inc. ● As Bel Fuse Inc. i

Amended Confirmation of Transaction, by and between Bel Fuse Inc. and PNC Bank, National Association, dated as of January 18, 2023, is incorporated by reference to Exhibit 10.8 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022 filed on March 10, 2023.

Exhibit 10.8 January 18, 2023 BEL FUSE INC 206 VAN VORST ST JERSEY CITY, NJ 07302-4421 Attn: Marc Pryor, Farouq Tuweiq Email: [email protected]; [email protected] From: Matthew Gelles Phone: 215-585-1434 Reference: MX356673 UTI: AD6GFRVSDT01YPT1CS68MX356673 The purpose of this letter agreement (this “Confirmation”) is to confirm the terms and conditions of the Interest Rate Swap transaction

Conformed Amended and Restated Credit and Security Agreement, dated as of September 2, 2021 (reflecting changes thereto pursuant to First Amendment Agreement dated as of January 12, 2023), by and among Bel Fuse Inc., as Borrower, KeyBank National Association, as Administrative Agent, Swing Line Lender and Issuing Lender, and the other lenders identified therein.

Exhibit 10.5 EXHIBIT A TO FIRST AMENDMENT AGREEMENT ========================================================================================================================================== Conformed Credit Agreement reflecting changes pursuant to First Amendment Agreement dated as of January 12, 2023 Published Transaction CUSIP Number: 07734RAE8 Published Revolver CUSIP Number: 07734RAF5 AMENDED

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676

Subsidiaries of the Registrant.

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT Bel Components Ltd. Hong Kong Bel Connector Inc. Delaware Bel Fuse (Macao Commercial Offshore) Limited Macao Bel Fuse Limited Hong Kong Bel Guangxi Electronics Co. Ltd. PRC Bel Power (Hangzhou) Co. Ltd. PRC Bel Power Europe S.r.l. Italy Bel Power Inc. Massachusetts Bel Power Solutions Co. Ltd. China Bel Power Solutions GmbH Switzerland Bel Power Solution

Description of securities.

Exhibit 4.1 Description of Capital Stock Bel Fuse Inc. (the “Company”) is authorized to issue 10,000,000 shares of Class A Common Stock, par value $0.10 per share (the “Class A Common Stock”), and 30,000,000 shares of Class B Common Stock, par value $0.10 per share (the “Class B Common Stock” and, together with the Class A Common Stock, the “Common Stock”). As of March 1, 2023, there were 2,141,58

First Amendment Agreement, dated as of January 12, 2023, to Amended and Restated Credit and Security Agreement, dated as of September 2, 2021, by and among Bel Fuse Inc., as Borrower, KeyBank National Association, as Administrative Agent, Swing Line Lender and Issuing Lender, and the other lenders identified therein, is incorporated by reference to Exhibit 10.4 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022 filed on March 10, 2023.

Exhibit 10.4 FIRST AMENDMENT AGREEMENT This FIRST AMENDMENT AGREEMENT (this “Amendment”) is made as of the 12th day of January, 2023 among: (a) BEL FUSE INC., a New Jersey corporation (the “Borrower”); (b) the Lenders, as defined in the Credit Agreement, as hereinafter defined; and (c) KEYBANK NATIONAL ASSOCIATION, a national banking association, as the administrative agent for the Lenders under t

Amended Confirmation of Transaction, by and between Bel Fuse Inc. and KeyBank National Association, dated as of January 18, 2023, is incorporated by reference to Exhibit 10.9 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022 filed on March 10, 2023.

Exhibit 10.9 KeyBank AMENDED CONFIRMATION Date: 18-Jan-23 To: BEL FUSE INC. ("Counterparty") Attention: Marc Pryor, Farouq Tuweig Email: [email protected]; [email protected] From: KEYBANK NATIONAL ASSOCIATION ("KeyBank") Re: Interest Rate Swap Transaction ("Transaction") (Deal# 404265 404270 /Tran# 404265 404270) UTI: HUX2X73FUCYHUVH1BK78404265RA44942466070000 HUX2X73FUCYHUVH1BK78404270RA44

BELFB / Bel Fuse Inc. - Class B / Bennett Christopher Finch - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment 1)* Bel Fuse Inc. (Name of Issuer) Class A Common Stock, par value $0.10 per share (Title of Class of Securities) 077347201 (CUSIP Number) Christopher F. Bennett 30 Chatham Road P.O. Box 216 Short Hills, New Jersey 07078 (610) 564-6801 (Name, Address an

BELFB / Bel Fuse Inc. - Class B / GAMCO INVESTORS, INC. ET AL Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 47) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of Person Authorized to Rec

Bel Reports Fourth Quarter and Full Year 2022 Results A Strong Finish to a Record-Breaking Year

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Reports Fourth Quarter and Full Year 2022 Results A Strong Finish to a Record-Breaking Year JERSEY CITY, NJ, Wednesday, February 22, 2023 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the fourth quarter and f

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 22, 2023

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 22, 2023 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number)

BELFB / Bel Fuse, Inc. / VANGUARD GROUP INC - SCHEDULE 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: Bel Fuse Inc. Class B Title of Class of Securities: Common Stock CUSIP Number: 077347300 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 13d-1(b) ☐ R

BELFB / Bel Fuse, Inc. / TETON WESTWOOD FUNDS Passive Investment

SC 13G/A 1 belfa13g08.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 8)* Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) December 31, 2022 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rul

Bel Prepares for Growth with Three Executive Promotions

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Prepares for Growth with Three Executive Promotions JERSEY CITY, NJ, Tuesday, January 3, 2023 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB), a leading global manufacturer of products that power, protect and connect electronic circuits, today announces three

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 1, 2023 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission File Number)

BELFB / Bel Fuse, Inc. / Bennett Christopher Finch - SC 13D Activist Investment

SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment )* Bel Fuse Inc. (Name of Issuer) Class A Common Stock, par value $0.10 per share (Title of Class of Securities) 077347201 (CUSIP Number) Christopher F. Bennett P.O. Box 216 Short Hills, New Jersey 07078 (610) 564-6801 (Name, Address and Telephone Number

Offer Letter, dated July 27, 2022, between Bel Fuse Inc. and Kenneth Lai, is incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2022 filed on November 4, 2022.

Exhibit 10.1 July 27, 2022 To: Kenneth Lai Fr: Dan Bernstein Cc: Dennis Ackerman Re: Bel Corporate Position / Vice President Asia Operations Dear Kenneth, The purpose of this letter is to provide you with a preliminary offer of employment for the corporate position of Vice President Asia Operations located in Gongming, China. This position is a corporate position, and may need final approval by th

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE

Bel Reports Third Quarter 2022 Results Seventh Consecutive Quarter of Year-over-Year Sales Growth

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Reports Third Quarter 2022 Results Seventh Consecutive Quarter of Year-over-Year Sales Growth JERSEY CITY, NJ, Wednesday, October 26, 2022 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the third quarter of 20

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 26, 2022 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE INC.

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 27, 2022 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission File Number) (I

Bel Announces Retirements of Raymond Cheung, VP of Asia Operations, and Mr. YK Tso, Zhongshan Operations Director; Kenneth Lai Named Successor for VP of Asia Operations

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Three Part Advisors Jean Marie Young, Managing Director or Steven Hooser, Partner 631-418-4339 Company Contact: Farouq Tuweiq Chief Financial Officer [email protected] Bel Announces Retirements of Raymond Cheung, VP of Asia Operations, and Mr. YK

Bel Reports Second Quarter 2022 Results Sixth Consecutive Quarter of Year-over-Year Sales Growth

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Reports Second Quarter 2022 Results Sixth Consecutive Quarter of Year-over-Year Sales Growth JERSEY CITY, NJ, Wednesday, July 27, 2022 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the second quarter of 2022.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 27, 2022 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report BEL FUSE INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report BEL FUSE INC. (Exact name of registrant as specified in its charter) New Jersey 000-11676 (State of incorporation) (Commission File Number) 206 Van Vorst Street, Jersey City, New Jersey 07302 (Address of principal executive offices) (Zip Code) Farouq Tuweiq (201) 432-0463 (Name and telepho

Conflict Minerals Report of Bel Fuse Inc.

Exhibit 1.01 Bel Fuse Inc. Conflict Minerals Report For the reporting period from January 1, 2021 to December 31, 2021 This Conflict Minerals Report (the "Report") of Bel Fuse Inc. (referred to in this Report as the "Company," "Bel," "we," "us," or "our") for the reporting period from January 1, 2021 to December 31, 2021 (the "Reporting Period") has been prepared pursuant to Rule 13p-1 and Form SD

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 24, 2022 BEL FUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission File Number) (I

Employment Agreement, dated as of May 6, 2022, by and between Bel Fuse Inc. and Farouq Tuweiq, is incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2022 filed on May 6, 2022.

Exhibit 10.1 Employment Agreement This Employment Agreement (the ?Agreement?) is made and entered into as of May 6, 2022 (the ?Effective Date?), by and between Farouq Tuweiq (the ?Executive?) and Bel Fuse, Inc., a New Jersey corporation (the ?Company?). WHEREAS, the Company employs the Executive as its Chief Financial Officer; and WHEREAS, the Company and the Executive desire to set forth the term

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE INC.

Bel Reports First Quarter 2022 Results Continued Top Line Growth and Margin Improvement

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Reports First Quarter 2022 Results Continued Top Line Growth and Margin Improvement JERSEY CITY, NJ, Wednesday, April 27, 2022 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the first quarter of 2022. First Qu

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): April 27, 2022 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

Description of securities.

Exhibit 4.1 Description of Capital Stock Bel Fuse Inc. (the ?Company?) is authorized to issue 10,000,000 shares of Class A Common Stock, par value $0.10 per share (the ?Class A Common Stock?), and 30,000,000 shares of Class B Common Stock, par value $0.10 per share (the ?Class B Common Stock? and, together with the Class A Common Stock, the ?Common Stock?). As of March 1, 2022, there were 2,144,91

Subsidiaries of the Registrant.

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT BCMZ Precision Engineering Limited England and Wales Bel Components Ltd. Hong Kong Bel Connector Inc. Delaware Bel Fuse (Macao Commercial Offshore) Limited Macao Bel Fuse Limited Hong Kong Bel Power (Hangzhou) Co. Ltd. PRC Bel Power Europe S.r.l. Italy Bel Power Inc. Massachusetts Bel Power Solutions Co. Ltd. China Bel Power Solutions GmbH Switzerland Be

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676

Consulting Agreement, dated October 15, 2021, by and between Bel Fuse Inc. and HR Asset Partners, is incorporated by reference to Exhibit 10.9 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2021 filed on March 14, 2022.

Exhibit 10.9 CONSULTING AGREEMENT This Agreement (hereinafter referred to as "Agreement") is made and entered into by and between HR Asset Partners (hereinafter referred to as ?Consultant?) located at 109 Pine Tree Lane, Altamonte Springs, FL 32714, and Bel Fuse Inc. (hereinafter referred to as ?Bel?) located at 206 Van Vorst Street, Jersey City, NJ 07302. Bel desires to retain Consultant to rende

Bel Reports Fourth Quarter and Full Year 2021 Results Impressive Top Line Growth with Solid Q4 Margin Improvement

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Bel Reports Fourth Quarter and Full Year 2021 Results Impressive Top Line Growth with Solid Q4 Margin Improvement JERSEY CITY, NJ, Thursday, February 24, 2022 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the fou

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 24, 2022 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number)

BELFB / Bel Fuse, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 4)* Name of issuer: Bel Fuse Inc. Class B Title of Class of Securities: Common Stock CUSIP Number: 077347300 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

BELFB / Bel Fuse, Inc. / TETON WESTWOOD FUNDS Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 7)* Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) December 31, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): December 6, 2021 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission File Number)

ISDA Master Agreement, by and between Bel Fuse Inc. and KeyBank National Association, dated as of November 16, 2021, is incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on December 10, 2021.

Exhibit 10.2 ISDA? International Swaps and Derivatives Association, Inc. 2002 MASTER AGREEMENT dated as of November 16, 2021 KeyBank National Association (?Party A?) and Bel Fuse Inc. (?Party B?) have entered and/or anticipate entering into one or more transactions (each a ?Transaction?) that are or will be governed by this 2002 Master Agreement, which includes the schedule (the ?Schedule?), and t

ISDA Master Agreement, by and between Bel Fuse Inc. and PNC Bank, National Association, dated as of November 10, 2021, is incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on December 10, 2021.

Exhibit 10.1 ISDA? International Swaps and Derivatives Association, Inc. 2002 MASTER AGREEMENT dated as of November 10, 2021 PNC Bank, National Association (?PNC?) and Bel Fuse Inc. (?Counterparty?) have entered and/or anticipate entering into one or more transactions (each a ?Transaction?) that are or will be governed by this 2002 Master Agreement, which includes the schedule (the ?Schedule?), an

Confirmation of transaction, by and between Bel Fuse Inc. and PNC Bank, National Association, dated as of December 6, 2021.

Exhibit 10.3 December 6, 2021 BEL FUSE INC 206 VAN VORST ST JERSEY CITY, NJ 07302-4421 Attn: Marc Pryor, Farouq Tuweiq Email: [email protected]; [email protected] From: Matthew Gelles Phone: 215-585-1434 Reference: MX306526 USI: 1030450478MX306526 The purpose of this letter agreement is to confirm the terms and conditions of the Interest Rate Swap transaction (the "Transaction") entered int

Confirmation of transaction, by and between Bel Fuse Inc. and KeyBank National Association, dated as of December 6, 2021.

Exhibit 10.4 CONFIRMATION Date 12/06/2021 To: BEL FUSE INC. (?Counterparty?) Attention: Marc Pryor Email: no email address available From: KEYBANK NATIONAL ASSOCIATION (?KeyBank?) Re: Interest Rate Swap Transaction (?Transaction?) (Deal # 387930 / Tran # 387949) (Deal # 387930 / Tran # 387949) USI: 1030451927387930RA445343646600000000000000 1030451927387931RA445343651000000000000000 Ladies and Gen

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE

Bel Appoints Jacqueline Brito to Board of Directors

Exhibit 99.2 Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Bel Investor Relations [email protected] Company Contact: Lynn Hutkin Director of Financial Reporting [email protected] Bel Appoints Jacqueline Brito to Board of Directors JERSEY CITY, NJ, October 28, 2021 - Bel Fuse Inc. (?Bel,? or the Company?) (Nasdaq:BELFA and

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 28, 2021 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission File Number)

Bel Reports Third Quarter 2021 Results Strong performance across all segments with record backlog

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Bel Investor Relations [email protected] Company Contact: Lynn Hutkin Director of Financial Reporting [email protected] Bel Reports Third Quarter 2021 Results Strong performance across all segments with record backlog JERSEY CITY, NJ, Friday,

Amended and Restated Credit and Security Agreement, dated as of September 2, 2021, by and among Bel Fuse Inc., as Borrower, KeyBank National Association, as Administrative Agent, Swing Line Lender and Issuing Lender, and the other lenders identified therein

Exhibit 10.1 ========================================================================================================================================== Published Transaction CUSIP Number: 07734RAE8 Published Revolver CUSIP Number: 07734RAF5 AMENDED AND RESTATED CREDIT AND SECURITY AGREEMENT among BEL FUSE INC. as Borrower THE LENDERS NAMED HEREIN as Lenders and KEYBANK NATIONAL ASSOCIATION as Admi

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 2, 2021 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE INC.

Bel Reports Second Quarter 2021 Results

EX-99.1 2 ex253189.htm EXHIBIT 99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Darrow Associates tel 516.419.9915 [email protected] Company Contact: Lynn Hutkin Director of Financial Reporting [email protected] Bel Reports Second Quarter 2021 Results JERSEY CITY, NJ, Friday, July 30

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 30, 2021 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 29, 2021 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R

BELFB / Bel Fuse, Inc. / JPMORGAN CHASE & CO - FILING BEL FUSE INC. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 01)* BEL FUSE INC. (Name of Issuer) Class B Common Stock ($0.10 par value) (Title of Class of Securities) 077347300 (CUSIP Number) May 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant t

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report BEL FUSE INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report BEL FUSE INC. (Exact name of registrant as specified in its charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 206 Van Vorst Street, Jersey City, New Jersey 07302 (Address of principal executive offices) (Zip Code

Conflict Minerals Report of Bel Fuse Inc.

Exhibit 1.01 Bel Fuse Inc. Conflict Minerals Report For the reporting period from January 1, 2020 to December 31, 2020 This Conflict Minerals Report (the "Report") of Bel Fuse Inc. (referred to in this Report as the "Company," "Bel," "we," "us," or "our") for the reporting period from January 1, 2020 to December 31, 2020 (the "Reporting Period") has been prepared pursuant to Rule 13p-1 and Form SD

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 18, 2021 BEL FUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 000-11676 22-1463699 (State of incorporation) (Commission File Number) (I

Quarterly Report - FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676 BEL FUSE INC.

Bel Reports First Quarter 2021 Results

EX-99.1 2 ex239420.htm EXHIBIT 99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Darrow Associates tel 516.419.9915 [email protected] Company Contact: Daniel Bernstein President [email protected] Bel Reports First Quarter 2021 Results JERSEY CITY, NJ, Monday, May 3, 2021 - Bel Fuse In

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 3, 2021 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S

Power of Attorney, dated April 8, 2021.

Exhibit 24 POWER OF ATTORNEY Know all by these present that the undersigned hereby constitutes and appoints each of Alan Wovsaniker, Lloyd Jeglikowski, Farouq Tuweiq and Lynn Hutkin as his true and lawful attorney-in-fact to: 1.

- FORM DEF 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)*

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)* Bel Fuse Inc. (Name of Issuer) Class A Common Stock, par value $0.10 per share (Title of Class of Securities) 077347201 (CUSIP Number) Alan Wovsaniker, Esq. Lowenstein Sandler LLP One Lowenstein Drive Roseland, New Jersey 07068 (973) 597-2500 (Name, Addr

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 46) Bel Fuse Inc.

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 46) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of Person Authorized to Rec

Letter to Securities and Exchange Commission from Deloitte & Touche LLP, dated March 12, 2021.

Exhibit 16.1 March 12, 2021 Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549-7561 Dear Sirs/Madams: We have read Item 4.01 of Bel Fuse Inc.'s (the ?Company?) Form 8-K/A dated March 12, 2021, and have the following comments: 1. We agree with the statements made in the first through fourth paragraphs regarding the dismissal of Deloitte & Touche LLP as the Company?s Indepe

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 16, 2021 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number

Annual Report - FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2020 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 000-11676

Description of securities.

Exhibit 4.1 Description of Capital Stock Bel Fuse Inc. (the ?Company?) is authorized to issue 10,000,000 shares of Class A Common Stock, par value $0.10 per share (the ?Class A Common Stock?), and 30,000,000 shares of Class B Common Stock, par value $0.10 per share (the ?Class B Common Stock? and, together with the Class A Common Stock, the ?Common Stock?). As of March 1, 2021, there were 2,144,91

Subsidiaries of the Registrant.

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT BCMZ Precision Engineering Limited England and Wales Bel Components Ltd. Hong Kong Bel Connector Inc. Delaware Bel Fuse (Macao Commerical Offshore) Limited Macao Bel Fuse Limited Hong Kong Bel Power (Hangzhou) Co. Ltd. PRC Bel Power Europe S.r.l. Italy Bel Power Inc. Massachusetts Bel Power Solutions Co. Ltd. China Bel Power Solutions GmbH Switzerland Be

Letter to Securities and Exchange Commission from Deloitte & Touche LLP, dated February 19, 2021

Exhibit 16.1 February 19, 2021 Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549-7561 Dear Sirs/Madams: We have read Item 4.01 of Bel Fuse Inc.'s (the "Company") Form 8-K dated February 19, 2021, and have the following comments: 1. We agree with the statements made in the first through fourth paragraphs regarding the dismissal of Deloitte & Touche LLP as the Company's In

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 16, 2021 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number)

Bel Reports Fourth Quarter and Full Year 2020 Results

EX-99.1 2 ex217057.htm EXHIBIT 99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Darrow Associates tel 516.419.9915 [email protected] Company Contact: Daniel Bernstein President [email protected] Bel Reports Fourth Quarter and Full Year 2020 Results JERSEY CITY, NJ, Thursday, February

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 18, 2021 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number)

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 10 )* Bel Fuse Inc (Name of Issuer) Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)* Name of issuer: Bel Fuse Inc. Class B Title of Class of Securities: Common Stock CUSIP Number: 077347300 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6)* Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) (CUSIP Number) Decemb

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6)* Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) December 31, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* BEL FUSE INC. (Name of Issuer) Class B Common Stock ($0.10 par value) (Title of Class of Securities) (CUS

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* BEL FUSE INC. (Name of Issuer) Class B Common Stock ($0.10 par value) (Title of Class of Securities) 077347300 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the

- FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 5, 2021 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I

Bel Fuse Appoints Farouq Tuweiq, Former Investment Banker, as Chief Financial Officer

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Darrow Associates tel 516.419.9915 [email protected] Company Contact: Daniel Bernstein President [email protected] Bel Fuse Appoints Farouq Tuweiq, Former Investment Banker, as Chief Financial Officer JERSEY CITY, NJ, January 5, 2021 - Bel

Quarterly Report - FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 0-11676 BEL FUSE IN

- FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 30, 2020 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (

Bel Appoints Sherry Urban VP of Human Resources for Bel Fuse Inc.

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Darrow Associates tel 516.419.9915 [email protected] Company Contact: Daniel Bernstein President [email protected] Bel Appoints Sherry Urban VP of Human Resources for Bel Fuse Inc. JERSEY CITY, NJ, October 30, 2020 - Bel Fuse Inc. (“Bel,” o

Results of Operations and Financial Condition - FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 30, 2020 BELFUSE INC /NJ BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) New Jersey 0-11676 22-1463699 (State of incorporation) (Commission File Number) (

Bel Reports Third Quarter 2020 Results

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Darrow Associates tel 516.419.9915 [email protected] Company Contact: Daniel Bernstein President [email protected] Bel Reports Third Quarter 2020 Results JERSEY CITY, NJ, Friday, October 30, 2020 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB), a

Quarterly Report - FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 0-11676 BEL FUSE INC. 20

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 31, 2020 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) NEW JERSEY 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer Ide

Bel Reports Second Quarter 2020 Results

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Darrow Associates tel 516.419.9915 [email protected] Company Contact: Daniel Bernstein President [email protected] Bel Reports Second Quarter 2020 Results JERSEY CITY, NJ, Friday, July 31, 2020 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB), a d

-

June 23, 2020 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.

- FORM S-8

As filed with the Securities and Exchange Commission on June 18, 2020 Registration No.

Power of Attorney.

EX-24.1 4 ex190706.htm POWER OF ATTORNEY Exhibit 24.1 POWER OF ATTORNEY WHEREAS, the undersigned officers and directors of Bel Fuse Inc. desire to authorize Daniel Bernstein and Craig Brosious to act as their attorneys-in-fact and agents, for the purpose of executing and filing the Registration Statement described below, including all amendments and supplements thereto, NOW, THEREFORE, KNOW ALL ME

- FORM S-3

As filed with the Securities and Exchange Commission on June 15, 2020 Registration No.

POWER OF ATTORNEY

EX-24.1 5 ex190381.htm POWER OF ATTORNEY Exhibit 24.1 POWER OF ATTORNEY WHEREAS, the undersigned officers and directors of Bel Fuse Inc. desire to authorize Daniel Bernstein and Craig Brosious to act as their attorneys-in-fact and agents, for the purpose of executing and filing the Registration Statement described below, including all amendments and supplements thereto, NOW, THEREFORE, KNOW ALL ME

BEL FUSE INC. _______________________________, as Trustee Dated as of ___________, 20__ Providing for the Issuance of Debt Securities CROSS-REFERENCE TABLE*

Exhibit 4.10 BEL FUSE INC. and , as Trustee INDENTURE Dated as of , 20 Providing for the Issuance of Debt Securities CROSS-REFERENCE TABLE* Trust Indenture Act Section Indenture Section 310 (a)(1) N.A. (a)(2) 6.13 (a)(3) 6.13 (a)(4) N.A. (a)(5) 7.01 (b) 7.02 (c) 7.02 311 (a) 7.03 (b) 7.03 (c) 7.03 312 (a) 7.03 (b) 7.04; 1.02 (c) 1.02 313 (a) 1.02 (b)(2) N.A. (c) 1.02 (d) N.A. 314 (a) 6.01 (c)(1) 6

2020 Equity Compensation Plan, as amended, is incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed on June 12, 2020.

Exhibit 10.1 BEL FUSE INC. 2020 EQUITY COMPENSATION PLAN (As amended and restated effective as of May 4, 2020) 1. Purposes of the Plan. The purposes of this Bel Fuse Inc. 2020 Equity Compensation Plan (the “Plan”) are: to attract and retain the best available personnel for positions of substantial responsibility, to provide additional incentives to Employees, Directors and Consultants, and to prom

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 10, 2020 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) NEW JERSEY 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer Ide

BELFB / Bel Fuse Inc. / GAMCO INVESTORS, INC. ET AL Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 45) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of Person Authorized to Rec

Bel Fuse Inc. Conflict Minerals Report For the reporting period from January 1, 2019 to December 31, 2019

Exhibit 1.01 Bel Fuse Inc. Conflict Minerals Report For the reporting period from January 1, 2019 to December 31, 2019 This Conflict Minerals Report (the "Report") of Bel Fuse Inc. (referred to in this Report as the "Company," "Bel," "we," "us," or "our") for the reporting period from January 1, 2019 to December 31, 2019 (the "Reporting Period") has been prepared pursuant to Rule 13p-1 and Form SD

- FORM SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report BEL FUSE INC. (Exact name of registrant as specified in its charter) NEW JERSEY 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 206 Van Vorst Street, Jersey City, New Jersey 07302 (Address of principal executive offices) (Zip Code)

- FORM DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive

-

May 20, 2020 Ms. Andi Carpenter Division of Corporation Finance Office of Manufacturing Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 RE: Bel Fuse Inc. Form 10-K for the Fiscal Year Ended December 31, 2019 File No. 001-11676 Dear Ms. Carpenter: This letter constitutes the response by Bel Fuse Inc. (“Bel” or the “Company”) to your letter to Bel dated May 7, 2020 conce

Other Events, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 19, 2020 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) NEW JERSEY 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer Iden

- FORM DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive

- FORM DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive

Quarterly Report - FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 0-11676 BEL FUSE INC. 2

Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 1, 2020 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) NEW JERSEY 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer Ident

Bel Reports First Quarter 2020 Results

Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Darrow Associates tel 516.419.9915 [email protected] Company Contact: Daniel Bernstein President [email protected] Bel Reports First Quarter 2020 Results JERSEY CITY, NJ, Friday, May 1, 2020 - Bel Fuse Inc. (Nasdaq: BELFA and BELFB), a desi

BELFA / Bel Fuse Inc. DEF 14A - - FORM DEF 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

Amended and Restated By-Laws of Bel Fuse Inc. (Adopted March 27, 2020), are incorporated by reference to Exhibit 3.1 of the Company's Current Report on Form 8-K filed on April 2, 2020.

Exhibit 3.1 AMENDED AND RESTATED BY-LAWS OF BEL FUSE INC. Adopted March 27, 2020 ARTICLE I OFFICES SECTION 1. Principal Office. The principal office of the corporation shall be at 206 Van Vorst Street, in the City of Jersey City, County of Hudson, and State of New Jersey. SECTION 2. Other Offices. The corporation may have other offices at such other places, within or without the State of New Jerse

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 27, 2020 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) NEW JERSEY 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer Id

Subsidiaries of the Registrant.

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT BCMZ Precision Engineering Limited England and Wales Bel Components Ltd. Hong Kong Bel Connector Inc. Delaware Bel Fuse (Macao Commerical Offshore) Limited Macao Bel Fuse Limited Hong Kong Bel Power (Hangzhou) Co. Ltd. PRC Bel Power Europe S.r.l. Italy Bel Power Inc. Massachusetts Bel Power Solutions Co. Ltd. China Bel Power Solutions GmbH Switzerland Be

Description of securities

Exhibit 4.1 Description of Capital Stock Bel Fuse Inc. (the “Company”) is authorized to issue 10,000,000 shares of Class A Common Stock, par value $0.10 per share (the “Class A Common Stock”), and 30,000,000 shares of Class B Common Stock, par value $0.10 per share (the “Class B Common Stock” and, together with the Class A Common Stock, the “Common Stock”). As of March 1, 2020, there were 2,144,91

BELFA / Bel Fuse Inc. 10-K - Annual Report - FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 0-11676 BE

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 16, 2020 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) NEW JERSEY 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer Id

Bel Reports Fourth Quarter and Full Year 2019 Results

EX-99.1 2 ex171058.htm EXHIBIT 99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 Investor Contact: Darrow Associates tel 516.419.9915 [email protected] Company Contact: Daniel Bernstein President [email protected] Bel Reports Fourth Quarter and Full Year 2019 Results JERSEY CITY, NJ, Thursday, February

Bel Appoints Thomas E. Dooley and Dr. Rita Smith to Board of Directors

Exhibit 99.2 ` Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 8 Investor Contact: Peter Seltzberg, Managing Director Darrow Associates tel 516.419.9915 [email protected] Company Contact: Daniel Bernstein President [email protected] Bel Appoints Thomas E. Dooley and Dr. Rita Smith to Board of Directors JERSEY CITY, NJ, February 19, 2020 -

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 19, 2020 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) NEW JERSEY 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 18, 2020 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) NEW JERSEY 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer

Fourth Amendment, dated February 18, 2020, to the Credit and Security Agreement dated June 19, 2014, as amended and restated as of June 30, 2014, by and among Bel Fuse Inc., as Borrower, and KeyBank National Association, as Administrative Agent, Swing Line Lender and Issuing Lender, and the other lenders identified therein. Filed as Exhibit 10.1 to the Company's Current Report on Form 8-K filed on February 18, 2020 and incorporated herein by reference.

Exhibit 10.1 FOURTH AMENDMENT AGREEMENT This FOURTH AMENDMENT AGREEMENT (this “Amendment”) is made as of the 18th day of February, 2020 among: (a) BEL FUSE INC., a New Jersey corporation (the “Borrower”); (b) the Lenders, as defined in the Credit Agreement, as hereinafter defined; and (c) KEYBANK NATIONAL ASSOCIATION, a national banking association, as the administrative agent for the Lenders unde

Contents - Certain Business Components and Portions of CUI Global, Inc.'s Power and Electromechanical Business

EX-99.1 3 ex172432.htm FINANCIAL STATEMENTS OF CERTAIN BUSINESS COMPONENTS AND PORTIONS OF CUI GLOBAL, INC.'S POWER BUSINESS Exhibit 99.1 CERTAIN BUSINESS COMPONENTS AND PORTIONS OF CUI GLOBAL, INC.’S POWER BUSINESS Financial Statements of Certain Business Components of the Power and Electromechanical Business that have been acquired by Bel Fuse Inc. and Certain Allocations from CUI Global, Inc. A

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

EX-99.2 4 ex172433.htm PRO FORMA FINANCIAL STATEMENTS Exhibit 99.2 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS On December 3, 2019, Bel Fuse Inc., a New Jersey corporation (“Bel”, the “Company”, “we”, or “our”) completed its acquisition of the majority of the power supply products business of CUI Inc. (“CUI Power”) from CUI, Inc. and CUI Global Inc. (collectively, the “Seller”). Be

Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A Amendment No. 1 CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): December 3, 2019 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) NEW JERSEY 0-11676 22-1463699 (State of incorporation) (Commission File Number)

BELFA / Bel Fuse Inc. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 9)* BEL FUSE INC-CL B (Name of Issuer) Common Stock (Title of Class of Securities) 077347300 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sched

BELFA / Bel Fuse Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2)* Name of issuer: Bel Fuse Inc Title of Class of Securities: Common Stock CUSIP Number: 077347300 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 1

BELFB / Bel Fuse Inc. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 9)* BEL FUSE INC-CL A (Name of Issuer) Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sched

BELFB / Bel Fuse Inc. / TETON WESTWOOD FUNDS Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5)* Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) December 31, 2019 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

BELFB / Bel Fuse Inc. / GAMCO INVESTORS, INC. ET AL Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 44) Bel Fuse Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 077347201 (CUSIP Number) David Goldman GAMCO Investors, Inc. One Corporate Center Rye, New York 10580-1435 (914) 921-5000 (Name, Address and Telephone Number of Person Authorized to Rec

BELFB / Bel Fuse Inc. / GAMCO INVESTORS, INC. ET AL - EXHIBIT A Activist Investment

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Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): December 3, 2019 BEL FUSE INC. (Exact Name of Registrant as Specified in its Charter) NEW JERSEY 0-11676 22-1463699 (State of incorporation) (Commission File Number) (I.R.S. Employer

Bel Closes on Acquisition of CUI Inc. Power Assets

Exhibit 99.1 ` Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 8 Investor Contact: Peter Seltzberg, Managing Director Darrow Associates tel 516.419.9915 [email protected] Company Contact: Daniel Bernstein President [email protected] Bel Closes on Acquisition of CUI Inc. Power Assets JERSEY CITY, NJ, December 3, 2019 - Bel Fuse Inc. (“Bel,”

Bel Announces Agreement to Purchase CUI Power Assets

EX-99.1 3 ex164797.htm PRESS RELEASE OF BEL FUSE INC. DATED NOVEMBER 11, 2019 Exhibit 99.1 ` Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 www.belfuse.com tel 201.432.0463 fax 201.432.9542 8 Investor Contact: Peter Seltzberg, Managing Director Darrow Associates tel 516.419.9915 [email protected] Company Contact: Daniel Bernstein President [email protected] Bel Announces Agreement to Pur

Asset Purchase Agreement, dated as of November 11, 2019, by and among CUI, Inc., CUI Global, Inc. and Bel Fuse Inc. Filed as Exhibit 2.1 to the Company's Current Report on Form 8-K filed on November 14, 2019 and incorporated herein by reference.

EX-2.1 2 ex164796.htm ASSET PURCHASE AGREEMENT, DATED AS OF NOVEMBER 11, 2019, BY AND AMONG CUI, INC., CUI GLOBAL, INC. AND BEL FUSE INC. Exhibit 2.1 ASSET PURCHASE AGREEMENT This Asset Purchase Agreement (this “Agreement”), dated as of November 11, 2019, is entered into by and among CUI, Inc., an Oregon corporation (“Seller”), CUI Global, Inc., a Colorado corporation (“Parent”), and Bel Fuse Inc.