SAGE / Sage Therapeutics, Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Sage Therapeutics, Inc.
US ˙ NasdaqGM ˙ US78667J1088
HINDI NA ACTIVE ANG SIMBONG ITO

Mga Batayang Estadistika
LEI 5493000JX4BJS9W6CN35
CIK 1597553
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Sage Therapeutics, Inc.
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
August 11, 2025 15-12G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-36544 Sage Therapeutics, Inc. (Exact name of registrant as specified in

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 POSASR

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 POSASR

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 POSASR

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 POSASR

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

August 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on August 1, 2025

As filed with the Securities and Exchange Commission on August 1, 2025 Registration No.

July 31, 2025 EX-10.1

AMENDMENT TO THE SEVERANCE AND CHANGE IN CONTROL AGREEMENT

EX-10.1 Exhibit 10.1 AMENDMENT TO THE SEVERANCE AND CHANGE IN CONTROL AGREEMENT This Amendment to the Severance and Change in Control Agreement (this “Amendment”) is made as of August 14, 2025 (the “Amendment Effective Date”) by and between Sage Therapeutics, Inc., a Delaware corporation (the “Company”), and Barry E. Greene (the “Executive”). WHEREAS, the Company and the Executive previously enter

July 31, 2025 SC TO-T/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (Amendment No. 2) SAGE THERAPEUTICS, INC. (Name of Subject Company (I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (Amendment No. 2) SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer)) SAPHIRE, INC. (Offeror) A Wholly Owned Subsidiary of SUPERNUS PHARMACEUTICALS, INC. (Parent of Offeror) (Names of Filing Persons) Common Stock

July 31, 2025 SC 14D9/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (Rule 14d-101) (Amendment No. 3) Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name

SC 14D9/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (Rule 14d-101) (Amendment No. 3) Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name of Subject Company) (Name of Person Filing Statement) Common Stock, $0.0001 par value per share (Title of Class of Securities) 78667J108 (CU

July 31, 2025 EX-3.1

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION SAGE THERAPEUTICS, INC.

EX-3.1 Exhibit 3.1 AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF SAGE THERAPEUTICS, INC. FIRST: The name of the corporation is Sage Therapeutics, Inc. (the “Corporation”). SECOND: The address of its registered office in the State of Delaware is 1209 Orange Street, Corporation Trust Center, Wilmington, New Castle County, Delaware 19801. The name of its registered agent at such address is The

July 31, 2025 EX-10.2

AMENDMENT TO THE SEVERANCE AND CHANGE IN CONTROL AGREEMENT

EX-10.2 Exhibit 10.2 AMENDMENT TO THE SEVERANCE AND CHANGE IN CONTROL AGREEMENT This Amendment to the Severance and Change in Control Agreement (this “Amendment”) is made as of [DATE] (the “Amendment Effective Date”) by and between Sage Therapeutics, Inc., a Delaware corporation (the “Company”), and [NAME] (the “Executive”). WHEREAS, the Company and the Executive previously entered into a certain

July 31, 2025 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): July 30, 2025 Sage Therapeutics,

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, 2025 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) Delaware 001-36544 27-4486580 (State of incorporation) (Commission File No.) (IRS Employer

July 30, 2025 EX-99.1

Sage Therapeutics Announces Second Quarter 2025 Financial Results Achieved $23.2 million in ZURZUVAE® (zuranolone) collaboration revenue in the second quarter of 2025 (50% of the net revenues recorded by Biogen), representing a 68% increase from the

EX-99.1 Exhibit 99.1 Sage Therapeutics Announces Second Quarter 2025 Financial Results Achieved $23.2 million in ZURZUVAE® (zuranolone) collaboration revenue in the second quarter of 2025 (50% of the net revenues recorded by Biogen), representing a 68% increase from the first quarter Previously announced acquisition by Supernus Pharmaceuticals expected to close in third quarter of 2025 Cash, cash

July 30, 2025 EX-10.2

2014 Employee Stock Purchase Plan, as amended

EXHIBIT 10.2 SAGE THERAPEUTICS, INC. 2014 EMPLOYEE STOCK PURCHASE PLAN, AS AMENDED The purpose of the Sage Therapeutics, Inc. 2014 Employee Stock Purchase Plan (“the Plan”) is to provide eligible employees of Sage Therapeutics, Inc. (the “Company”) and each Designated Subsidiary (as defined in Section 11) with opportunities to purchase shares of the Company’s common stock, par value $0.0001 per sh

July 30, 2025 EX-10.1

Form of Cash Award Agreement under the 2024 Equity Incentive Plan

Sage Therapeutics, Inc. CASH AWARD AGREEMENT1 Granted under 2024 Equity Incentive Plan Sage Therapeutics, Inc. (the “Company”) hereby grants the following cash award to the recipient named below pursuant to its 2024 Equity Incentive Plan (as amended through the date hereof, the “Plan”). The terms and conditions attached hereto are also a part hereof and incorporated herein by reference. Notice of

July 30, 2025 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): July 30, 2025 Sage Therapeutics,

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, 2025 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission F

July 30, 2025 10-Q

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 number: 001-36544 Sage The

July 28, 2025 SC 14D9/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (Rule 14d-101) (Amendment No. 2) Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name

SC 14D9/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (Rule 14d-101) (Amendment No. 2) Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name of Subject Company) (Name of Person Filing Statement) Common Stock, $0.0001 par value per share (Title of Class of Securities) 78667J108 (CU

July 28, 2025 EX-99.(A)(5)(C)

Press Release issued by Supernus Pharmaceuticals, Inc. on July 28, 2025.

Exhibit 99.(a)(5)(C) Supernus Pharmaceuticals Announces Expiration of Hart-Scott-Rodino Waiting Period for Sage Therapeutics, Inc. Tender Offer ROCKVILLE, Md., July 28, 2025 - Supernus Pharmaceuticals, Inc., a Delaware corporation (NASDAQ: SUPN) ("Supernus", and the "Company"), today announced that the required waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amend

July 28, 2025 SC TO-T/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO Tender Offer Statement under Section 14(d)(l) or 13(e)(l) of the Securities Exchange Act of 1934 (Amendment No. 1) SAGE THERAPEUTICS, INC. (Name of Subject Company (I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO Tender Offer Statement under Section 14(d)(l) or 13(e)(l) of the Securities Exchange Act of 1934 (Amendment No. 1) SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer)) SAPHIRE INC. (Offeror) A Wholly Owned Subsidiary of SUPERNUS PHARMACEUTICALS, INC. (Parent of Offeror) (Names of Filing Persons) Common Stock

July 21, 2025 SC 14D9/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (Rule 14d-101) (Amendment No. 1) Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (Rule 14d-101) (Amendment No. 1) Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name of Subject Company) (Name of Person Filing Statement) Common Stock, $0.0001 par value per share (Title of Class of Securities) 78667J108 (CUSIP Number

July 2, 2025 EX-FILING FEES

Filing Fee Table.*

Calculation of Filing Fee Tables Table 1: Transaction Valuation Transaction Valuation Fee Rate Amount of Filing Fee Fees to be Paid 1 $ 607,928,005.

July 2, 2025 EX-99.(A)(1)(A)

Offer to Purchase, dated July 2, 2025.*

TABLE OF CONTENTS  Exhibit (a)(1)(A) Offer to Purchase All Outstanding Shares of Common Stock of SAGE THERAPEUTICS, INC.

July 2, 2025 EX-99.(A)(1)(C)

Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.*

 Exhibit (a)(1)(C) Offer to Purchase All Outstanding Shares of Common Stock of SAGE THERAPEUTICS, INC.

July 2, 2025 SC TO-T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer)) Saphire, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer)) Saphire, Inc. (Offeror) A Wholly Owned Subsidiary of SUPERNUS PHARMACEUTICALS, INC. (Parent of Offeror) Common Stock par value $0.0001 per share (Title of Class

July 2, 2025 EX-99.(D)(2)

Form of Contingent Value Rights Agreement.*

Exhibit 99.(d)(2) CONFIDENTIAL ANNEX III FORM OF CVR AGREEMENT THIS CVR AGREEMENT (“Agreement”) is made and entered into as of [●], 2025, by and between: Supernus Pharmaceuticals, Inc., a Delaware corporation (“Parent”) and [Rights Agent], a [●], as Rights Agent (as defined herein). Capitalized terms used but not defined herein shall have the meanings assigned to such terms in the Merger Agreement

July 2, 2025 EX-99.(A)(1)(D)

Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.*

 Exhibit (a)(1)(D) Offer to Purchase All Outstanding Shares of Common Stock of SAGE THERAPEUTICS, INC.

July 2, 2025 EX-99.(A)(1)(E)

Summary Advertisement, published in the

 Exhibit (a)(1)(E) This announcement is neither an offer to purchase nor a solicitation of an offer to sell Shares (as defined below).

July 2, 2025 EX-99.(D)(4)

Confidentiality Agreement, dated February 5, 2025, by and among Supernus Pharmaceuticals, Inc. and Sage Therapeutics, Inc.*

Exhibit 99.(d)(4) CONFIDENTIAL February 5, 2025 Supernus Pharmaceuticals, Inc. 9715 Key West Avenue Rockville, MD 20850 Re: Confidentiality Agreement Supernus Pharmaceuticals, Inc. (referred to herein as “you or your”) has requested certain Evaluation Material (as defined below) from Sage Therapeutics, Inc. (together with its subsidiaries, the “Company”) in connection with the evaluation, negotiat

July 2, 2025 SC 14D9

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name of Subject Company) (Name of Pers

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name of Subject Company) (Name of Person Filing Statement) Common Stock, $0.0001 par value per share (Title of Class of Securities) 78667J108 (CUSIP Number of Class of Se

July 2, 2025 EX-99.(A)(1)(B)

Letter of Transmittal (including Guidelines for Certification of Taxpayer Identification Number on IRS Form W-9).*

 Exhibit (a)(1)(B) Letter of Transmittal to Tender Shares of Common Stock of SAGE THERAPEUTICS, INC.

July 2, 2025 EX-99.(D)(3)

Mutual Non-Disclosure Agreement, dated January 24, 2025, by and among Supernus Pharmaceuticals, Inc. and Sage Therapeutics, Inc.*

Exhibit 99.(d)(3) 4985741v1 MUTUAL NON-DISCLOSURE AGREEMENT This MUTUAL NON-DISCLOSURE AGREEMENT is made and entered into as of January 24, 2025 (the “Effective Date”), between Sage Therapeutics, Inc. (“SAGE”), with offices at 55 Cambridge Parkway, Cambridge, MA, and Supernus Pharmaceuticals, Inc. (“Supernus”), with offices at 9715 Key West Avenue, Rockville, MD 20850. SAGE and Supernus may be ref

June 16, 2025 EX-99.2

Master Q&A

EX-99.2 Exhibit 99.2 Page 1 of 12 Master Q&A General / Supernus 1. What was announced? • We announced that Sage has entered into an agreement to be acquired by Supernus Pharmaceuticals. • This transaction concludes the Board’s thoughtful and comprehensive strategic review process announced in January and marks the beginning of an exciting next chapter for Sage. • As part of Supernus, we believe we

June 16, 2025 EX-99.1

Supernus Pharmaceuticals to Acquire Sage Therapeutics, Strengthening its Neuropsychiatry Product Portfolio

EX-99.1 Exhibit 99.1 Supernus Pharmaceuticals to Acquire Sage Therapeutics, Strengthening its Neuropsychiatry Product Portfolio • Proposed acquisition expected to accelerate mid- to long-term revenue and cash flow growth and further diversify revenue base. • Strengthens Supernus’ leading presence in neuropsychiatric conditions with an innovative commercial product, ZURZUVAE® (zuranolone), and a no

June 16, 2025 EX-99.1

Exhibit 99.1 — Joint Press Release of Supernus Pharmaceuticals, Inc. and Sage Therapeutics, Inc., dated June 16, 2025.

Exhibit 99.1 Supernus Pharmaceuticals to Acquire Sage Therapeutics, Strengthening its Neuropsychiatry Product Portfolio § Proposed acquisition expected to accelerate mid- to long-term revenue and cash flow growth and further diversify revenue base. § Strengthens Supernus’ leading presence in neuropsychiatric conditions with an innovative commercial product, ZURZUVAE® (zuranolone), and a novel CNS

June 16, 2025 EX-99.3

Social media post, dated June 16, 2025

Exhibit 99.3 Social media post Corporate LinkedIn Today, we announced an agreement to be acquired by Supernus Pharmaceuticals. As part of Supernus, we look forward to building on our commitment to brain health and continuing our work in postpartum depression. You can read more important information about this exciting transaction here https://bit.ly/4jXYPx3. Various employees of the Company subseq

June 16, 2025 EX-2.1

Agreement and Plan of Merger, dated as of June 13, 2025, by and among Sage Therapeutics, Inc., Supernus Pharmaceuticals, Inc. and Saphire, Inc.

EX-2.1 Exhibit 2.1 EXECUTION VERSION AGREEMENT AND PLAN OF MERGER among: Sage Therapeutics, Inc., a Delaware corporation; Supernus Pharmaceuticals, Inc., a Delaware corporation; and Saphire, Inc., a Delaware corporation Dated as of June 13, 2025 Table of Contents Section 1 THE OFFER 1.1 The Offer 2 1.2 Company Actions 5 Section 2 MERGER TRANSACTION 2.1 Merger of Purchaser into the Company 6 2.2 Ef

June 16, 2025 EX-99.(A)(5)(D)

Note to Sage Employees sent on June 16, 2025.

Exhibit 99.(a)(5)(d) June 16, 2025 Dear Colleagues, Today’s announcement marks a historic milestone in the treatment of postpartum depression (PPD). Supernus and Sage agreed to unite to continue the fight against a condition that ails millions of women worldwide. You have our commitment that we will continue the incredible work that you started by creating Zurzuvae® and making it available to wome

June 16, 2025 EX-99.(A)(5)(C)

Transcript of Supernus Inc. Investor Presentation on June 16, 2025.

Exhibit 99.(a)(5)(c) Transcript of Supernus Inc. Investor Presentation on June 16, 2025. Operator: Good morning, everyone and welcome to Supernus Business Update Conference Call. At this time, all participants are in a listen-only mode. Later, we will conduct a question-and-answer session. Instructions will follow at that time. As a reminder, this conference call is being recorded. I would now lik

June 16, 2025 SC TO-C

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer)) Saphire, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer)) Saphire, Inc. (Offeror) a wholly-owned subsidiary of SUPERNUS PHARMACEUTICALS, INC. (Parent of Offeror) (Names of Filing Persons) Common Stock par value $0.0001

June 16, 2025 EX-99.5

Master Employee Q&A, dated June 16, 2025

Exhibit 99.5 Page 1 of 7 Master Employee Q&A • What was announced? • We announced that Sage has entered into an agreement to be acquired by Supernus Pharmaceuticals. • This transaction concludes the Board’s thoughtful and comprehensive strategic review process announced in January and marks the beginning of an exciting next chapter for Sage. • As part of Supernus, we believe we will be well positi

June 16, 2025 EX-99.4

Letter to Company employees, dated June 16, 2025

Exhibit 99.4 Letter to Company employees Subject: A new chapter for Sage Sageans, Nearly fourteen years ago, Sage set out with a bold undertaking to make a difference in brain health. We ambitiously set forth a mission to deliver life-changing brain health medications so every person can thrive. Since our inception, we have operated with determination and perseverance and made significant contribu

June 16, 2025 EX-99.6

Form of letter to suppliers and vendors

Exhibit 99.6 Form of letter to suppliers and vendors Subject: Today’s Announcement Dear [NAME / Valued Supplier / Vendor], Earlier today, Sage announced we entered an agreement to be acquired by Supernus Pharmaceuticals, a biopharmaceutical company focused on developing and commercializing products for the treatment of central nervous system diseases. You can read more about our announcement here.

June 16, 2025 EX-2.1

Exhibit 2.1* — Agreement and Plan of Merger, dated as of June 13, 2025, by and among Supernus Pharmaceuticals, Inc., Sage Therapeutics, Inc. and Saphire Inc.

Exhibit 2.1 EXECUTION VERSION AGREEMENT AND PLAN OF MERGER among: Sage Therapeutics, Inc., a Delaware corporation; Supernus Pharmaceuticals, Inc., a Delaware corporation; and Saphire, Inc., a Delaware corporation Dated as of June 13, 2025 Table of Contents Section 1 THE OFFER 1.1 The Offer 2 1.2 Company Actions 5 Section 2 MERGER TRANSACTION 2.1 Merger of Purchaser into the Company 6 2.2 Effect of

June 16, 2025 EX-99.2

Exhibit 99.2 — Investor Presentation dated June 16, 2025.

Exhibit 99.2 © 2025 Supernus Pharmaceuticals, Inc. All Rights Reserved. Acquisition of Sage Therapeutics, Inc. June 16, 2025 ©2025 Supernus Pharmaceuticals, Inc. All Rights Reserved. 2 This presentation and other matters discussed today or answers that may be given to questions asked include forward - looking statements within the meaning of the federal securities laws. These statements, among oth

June 16, 2025 SC TO-C

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 13, 2025 Supernus Pharmaceut

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 13, 2025 Supernus Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-35518 20-2590184 (State or other jurisdiction of incorporation or orga

June 16, 2025 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): June 13, 2025 Sage Therapeutics,

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 13, 2025 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) Delaware 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission F

June 16, 2025 EX-99.7

Email from Parent to Company employees, dated June 16, 2025

Exhibit 99.7 Email from Parent to Company employees To: SageEmployees From: Barry Greene Subject: Letter from Jack Khattar Sageans, Please see the attached letter from Jack Khattar, CEO of Supernus. bg June 16, 2025 Dear Colleagues, Today’s announcement marks a historic milestone in the treatment of postpartum depression (PPD). Supernus and Sage agreed to unite to continue the fight against a cond

June 16, 2025 SC14D9C

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (Rule 14d-101) Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name of Subject Company

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (Rule 14d-101) Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name of Subject Company) Sage Therapeutics, Inc. (Name of Persons Filing Statement) Common Stock, par value $0.0001 per share (Title of Class of Securities) 78667J108 (CUSIP

June 13, 2025 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): June 11, 2025 Sage Therapeutics,

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 11, 2025 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission F

April 29, 2025 EX-10.1

Non-Employee Director Compensation Program, as Amended Effective January 1, 2025

EXHIBIT 10.1 Sage Therapeutics, Inc. Non-Employee Director Compensation Program The purpose of this Non-Employee Director Compensation Program (this “Program”) of Sage Therapeutics, Inc., a Delaware corporation (the “Company”), is to provide a total compensation package that enables the Company to attract and retain, on a long-term basis, high-caliber directors who are not employees or officers of

April 29, 2025 10-Q

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 number: 001-36544 Sage Th

April 29, 2025 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): April 29, 2025 Sage Therapeutics,

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 29, 2025 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

April 29, 2025 EX-99.1

Sage Therapeutics Announces First Quarter 2025 Financial Results and Highlights Pipeline and Business Updates Achieved $13.8 million in ZURZUVAE® (zuranolone) collaboration revenue in the first quarter of 2025 (50% of the net revenues recorded by Bio

Exhibit 99.1 Sage Therapeutics Announces First Quarter 2025 Financial Results and Highlights Pipeline and Business Updates Achieved $13.8 million in ZURZUVAE® (zuranolone) collaboration revenue in the first quarter of 2025 (50% of the net revenues recorded by Biogen), representing a 21% increase from the fourth quarter Sustained growth in shipments to women with postpartum depression; Greater than

April 24, 2025 DEF 14A

EXECUTIVE OFFICER AND DIRECTOR COMPENSATION

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 ☐ Confid

April 24, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 ☐ Confide

March 4, 2025 8-K

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): March 3, 2025 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission F

February 11, 2025 10-K

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

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 number: 001-36544 Sage Therapeut

February 11, 2025 EX-21.1

Subsidiaries of the Registrant

Exhibit 21.1 SUBSIDIARIES Subsidiary Jurisdiction of Incorporation 1 Sage Securities Corporation Massachusetts 2 Sage (Bermuda) Ltd. Bermuda 3 Sage Therapeutics Limited England and Wales 4 Sage Therapeutics GmbH Switzerland 5 Sage Therapeutics GmbH Germany 6 Sage Therapeutics, Inc. Canada

February 11, 2025 EX-10.32

Separation Agreement between the Registrant and Anne Marie Cook, dated October 31, 2024

Exhibit 10.32 October 17, 2024 By Email Anne Marie Cook Dear Ms. Cook: Given recent developments, we have made the difficult decision to restructure the business and reduce the size of our workforce. Unfortunately, your position will be directly affected. We appreciate your service and contributions and want to thank you for your dedication to always doing what’s best for patients. We would like t

February 11, 2025 8-K

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): February 11, 2025 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissi

February 11, 2025 EX-19.1

Amended and Restated Sage Therapeutics, Inc. Insider Trading Policy, dated June 15, 2023

Exhibit 19.1 AMENDED AND RESTATED SAGE THERAPEUTICS, INC. Insider Trading Policy 1. Background and purpose 1.1 Why Have We Adopted This Policy? The federal securities laws prohibit any employee or member of the Board of Directors (a “Director”) of Sage Therapeutics, Inc. (together with its subsidiaries, “Sage”) from purchasing or selling Sage securities on the basis of material nonpublic informati

February 11, 2025 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Post-Effective Amendment No. 1 to Form S-3 (Form Type) Sage Therapeutics, 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 Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price

February 11, 2025 EX-97

Compensation Recovery Policy of the Registrant

Exhibit 97 SAGE THERAPEUTICS, INC. Compensation Recovery Policy This Compensation Recovery Policy (this “Policy”) is adopted by Sage Therapeutics, Inc. (the “Company”), effective as of October 2, 2023 (the “Effective Date”). Capitalized terms used in this Policy shall have the meanings assigned to them in Section 3. 1. Application of this Policy. Subject to the terms of this Policy and the require

February 11, 2025 EX-99.1

Sage Therapeutics Announces Fourth Quarter and Full Year 2024 Financial Results and Highlights Pipeline and Business Updates Strong first full year of launch with sustained growth in shipments to women with postpartum depression; Nearly 2,500 shipmen

Exhibit 99.1 Sage Therapeutics Announces Fourth Quarter and Full Year 2024 Financial Results and Highlights Pipeline and Business Updates Strong first full year of launch with sustained growth in shipments to women with postpartum depression; Nearly 2,500 shipments in fourth quarter of 2024 (21% increase from third quarter) $11.4 million in ZURZUVAE® (zuranolone) collaboration revenue in the fourt

February 11, 2025 EX-10.35

Promotion Letter Agreement by and between the Registrant and Christopher Benecchi, effective November 1, 2024

Exhibit 10.35 October 15th, 2024 Christopher Benecchi Sage Therapeutics Dear Chris: Thank you for your contributions toward achieving our mission to pioneer solutions to deliver life-changing brain health medicines so every person can thrive. Your continued contributions are critical to our ability to discover, develop, and deliver important new medicines to the market. Your belief in our mission,

February 11, 2025 EX-10.31

Consulting Agreement between the Registrant and Kimi Iguchi dated October 31, 2024

Exhibit 10.31 CONSULTING AGREEMENT Kimi Iguchi Dear Ms. Iguchi: Sage Therapeutics, Inc. (“Sage”) would like to engage you to provide consulting services commencing on October 31, 2024 (the “Effective Date”), under the following terms and conditions (the “Agreement”): 1. Description of Services. You will act as an independent consultant to Sage and use your best efforts to provide services, advice,

February 11, 2025 POS AM

As filed with the Securities and Exchange Commission on February 11, 2025

Table of Contents As filed with the Securities and Exchange Commission on February 11, 2025 Registration No.

February 11, 2025 EX-10.33

Promotion Letter Agreement by and between the Registrant and Gregory Shiferman, effective November 1, 2024

Exhibit 10.33 55 Cambridge Parkway Cambridge, MA 02142 www.sagerx.com October 25, 2024 Gregory Shiferman Dear Greg: At Sage, our mission is to pioneer solutions to deliver life-changing brain health medicines, so every person can thrive. Our success results from creating revolutionary therapeutics in concert with our enterprise-wide approach to excel in all areas of our business. On behalf of Sage

February 11, 2025 EX-10.30

Separation Agreement between the Registrant and Kimi Iguchi, dated October 31, 2024

Exhibit 10.30 October 17, 2024 By Email Kimi Iguchi Dear Ms. Iguchi: Given recent developments, we have made the difficult decision to restructure the business and reduce the size of our workforce. Unfortunately, your position will be directly affected. We appreciate your service and contributions and want to thank you for your dedication to always doing what’s best for patients. We would like to

February 11, 2025 EX-10.34

Severance and Change in Control Agreement between the Registrant and Gregory Shiferman, effective November 1, 2024

Exhibit 10.34 SEVERANCE AND CHANGE IN CONTROL AGREEMENT This Severance and Change in Control Agreement (this “Agreement”) is made as of October 15th, 2024, by and between Sage Therapeutics, Inc., a Delaware corporation (the “Company”), and Gregory Shiferman (the “Executive”) and shall become effective on November 1st, 2024, which is the date of appointment to the Leadership Team of the Company. 1.

February 11, 2025 POSASR

Powers of Attorney (included in the signature pages to the Registration Statement)

As filed with the Securities and Exchange Commission on February 11, 2025 Registration No.

January 27, 2025 EX-99.1

Sage Therapeutics Board of Directors Initiates Review of Strategic Alternatives and Rejects Biogen’s Unsolicited Acquisition Proposal Company Board Concludes the Proposal Significantly Undervalues Sage and Believes it is Not in the Best Interest of S

Exhibit 99.1 Sage Therapeutics Board of Directors Initiates Review of Strategic Alternatives and Rejects Biogen’s Unsolicited Acquisition Proposal Company Board Concludes the Proposal Significantly Undervalues Sage and Believes it is Not in the Best Interest of Shareholders The Company Remains Focused on the Goal of Establishing ZURZUVAE as the Standard of Care for Women with Postpartum Depression

January 27, 2025 8-K

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 27, 2025 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

January 13, 2025 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 10, 2025 Sage Therapeutic

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 10, 2025 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

January 13, 2025 EX-99.3

Sage Therapeutics Confirms Receipt of Unsolicited Nonbinding Acquisition Proposal from Biogen No Shareholder Action Required at This Time

Exhibit 99.3 Sage Therapeutics Confirms Receipt of Unsolicited Nonbinding Acquisition Proposal from Biogen No Shareholder Action Required at This Time CAMBRIDGE, Mass., January 10, 2025 – Sage Therapeutics, Inc. (Nasdaq: SAGE) (“The Company”), today confirmed that Biogen Inc. (Nasdaq: BIIB) (“Biogen”) has submitted to the Company an unsolicited, nonbinding proposal to acquire all of the outstandin

January 13, 2025 EX-99.2

Sage Therapeutics to Present 2025 Strategic Focus at 43rd Annual J.P. Morgan Healthcare Conference Increased investment in ZURZUVAE to help accelerate market growth in postpartum depression with the goal of topline revenue growth in 2025 R&D and G&A

Exhibit 99.2 Sage Therapeutics to Present 2025 Strategic Focus at 43rd Annual J.P. Morgan Healthcare Conference Increased investment in ZURZUVAE to help accelerate market growth in postpartum depression with the goal of topline revenue growth in 2025 R&D and G&A expenses expected to decrease substantially in 2025 Company anticipates extended cash runway to mid-2027 CAMBRIDGE, Mass. – January 12, 2

January 13, 2025 EX-99.1

Safe Harbor Statement The slides presented today and the accompanying oral presentations contain forward-looking statements, which may be identified by the use of words such as “may,” “might,” “will,” “should,” “can,” “expect,” “plan,” “anticipate,”

J.P. Morgan Healthcare Conference January 2025 Exhibit 99.1 Safe Harbor Statement The slides presented today and the accompanying oral presentations contain forward-looking statements, which may be identified by the use of words such as “may,” “might,” “will,” “should,” “can,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “project,” “intend,” “future,” “opportunity”, “goal”, “mission”, "v

November 26, 2024 8-K

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): November 22, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissi

November 20, 2024 8-K

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): November 20, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissi

November 20, 2024 EX-99.1

Sage Therapeutics Announces Topline Results from the Phase 2 DIMENSION Study of Dalzanemdor (SAGE-718) in the Treatment of Cognitive Impairment Associated with Huntington’s Disease - The Phase 2 DIMENSION Study did not meet its primary endpoint - Dal

Exhibit 99.1 Sage Therapeutics Announces Topline Results from the Phase 2 DIMENSION Study of Dalzanemdor (SAGE-718) in the Treatment of Cognitive Impairment Associated with Huntington’s Disease - The Phase 2 DIMENSION Study did not meet its primary endpoint - Dalzanemdor was generally well-tolerated; no new safety signals were observed - Based on these data, the Company does not plan further devel

November 14, 2024 SC 13G/A

SAGE / Sage Therapeutics, Inc. / BB BIOTECH AG - SC 13G/A Passive Investment

SC 13G/A 1 d826473dsc13ga.htm SC 13G/A United States SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Sage Therapeutics, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 78667J108 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing This Statement) Check the appropriate box to desi

November 1, 2024 8-K

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): October 31, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

October 29, 2024 EX-99.1

Sage Therapeutics Announces Third Quarter 2024 Financial Results and Highlights Pipeline and Business Updates Achieved $11 million in ZURZUVAE® (zuranolone) collaboration revenue during the third quarter of 2024 (50% of the net revenue recorded by Bi

Exhibit 99.1 Sage Therapeutics Announces Third Quarter 2024 Financial Results and Highlights Pipeline and Business Updates Achieved $11 million in ZURZUVAE® (zuranolone) collaboration revenue during the third quarter of 2024 (50% of the net revenue recorded by Biogen), representing 49% growth from the second quarter Sage and Biogen will not pursue further development of zuranolone in major depress

October 29, 2024 8-K

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): October 29, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

October 29, 2024 10-Q

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 number: 001-36544 Sag

October 18, 2024 SC 13G/A

SAGE / Sage Therapeutics, Inc. / STATE STREET CORP Passive Investment

SC 13G/A 1 SageTherapeuticsInc.htm SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* SAGE THERAPEUTICS INC (Name of Issuer) COMMON STOCK (Title of Class of Securities) 78667J108 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to designate the rule pur

October 17, 2024 8-K

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): October 14, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

October 8, 2024 EX-99.1

Sage Therapeutics Announces Topline Results from the Phase 2 LIGHTWAVE Study of Dalzanemdor

Exhibit 99.1 Sage Therapeutics Announces Topline Results from the Phase 2 LIGHTWAVE Study of Dalzanemdor (SAGE-718) in the Treatment of Mild Cognitive Impairment and Mild Dementia in Alzheimer’s Disease • In the Phase 2 LIGHTWAVE Study, dalzanemdor (SAGE-718) did not demonstrate a statistically significant difference from baseline in participants treated with dalzanemdor versus placebo on the prim

October 8, 2024 8-K

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): October 8, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

September 26, 2024 8-K

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): September 20, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commiss

September 17, 2024 EX-4.6

Form of Subordinated Note (incorporated by reference to Exhibit 4.6 of the Company’s Registration Statement on Form S-3 (File No. 333-282162) filed on September 17, 2024)

EX-4.6 Exhibit 4.6 Form of Subordinated Note (FACE OF SECURITY) [Each Global Security shall bear substantially the following legend: UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE REGISTERED FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER N

September 17, 2024 S-3ASR

As filed with the Securities and Exchange Commission on September 16, 2024

S-3ASR Table of Contents As filed with the Securities and Exchange Commission on September 16, 2024 Registration No.

September 17, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Sage Therapeutics, Inc.

September 17, 2024 EX-4.5

Form of Senior Note (incorporated by reference to Exhibit 4.5 of the Company’s Registration Statement on Form S-3 (File No. 333-282162) filed on September 17, 2024)

EX-4.5 Exhibit 4.5 Form of Senior Note (FACE OF SECURITY) [Each Global Security shall bear substantially the following legend: UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE REGISTERED FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE

September 17, 2024 EX-1.2

Sales Agreement, dated as of September 16, 2024, by and between the Company and TD Securities (USA) LLC (incorporated by reference to Exhibit 1.1 of the Company’s Registration Statement on Form S-3 (File No. 333-282162) filed on September 17, 2024)

Exhibit 1.2 SAGE THERAPEUTICS, INC. $250,000,000 SHARES OF COMMON STOCK, PAR VALUE $0.0001 PER SHARE SALES AGREEMENT September 16, 2024 TD Securities (USA) LLC 1 Vanderbilt Avenue New York, NY 10017 Ladies and Gentlemen: Sage Therapeutics, Inc. (the “Company”), confirms its agreement (this “Agreement”) with TD Securities (USA) LLC (“TD Cowen”), as follows: 1. Issuance and Sale of Shares. The Compa

September 17, 2024 EX-4.3

Form of Senior Indenture (incorporated by reference to Exhibit 4.3 of the Company’s Registration Statement on Form S-3 (File No. 333-282162) filed on September 17, 2024)

EX-4.3 Exhibit 4.3 SAGE THERAPEUTICS, INC. and Trustee INDENTURE Dated as of       SENIOR DEBT SECURITIES CROSS-REFERENCE TABLE 1 Section of Trust Indenture Act of 1939, as amended Section of Indenture 310(a) 6.09 310(b) 6.08 6.10 310(c) Inapplicable 311(a) 6.13 311(b) 6.13 311(c) Inapplicable 312(a) 4.01 4.04 312(b) 4.04(c) 312(c) 4.04(c) 313(a) 4.03 313(b) 4.03 313(c) 4.03 313(d) 4.03 314(a) 4.0

September 17, 2024 EX-4.4

Form of Subordinated Indenture (incorporated by reference to Exhibit 4.4 of the Company’s Registration Statement on Form S-3 (File No. 333-282162) filed on September 17, 2024)

EX-4.4 Exhibit 4.4 SAGE THERAPEUTICS, INC. and Trustee INDENTURE Dated as of SUBORDINATED DEBT SECURITIES CROSS-REFERENCE TABLE 1 Section of Trust Indenture Act of 1939, as amended Section of Indenture 310(a) 6.09 310(b) 6.08 6.10 310(c) Inapplicable 311(a) 6.13 311(b) 6.13 311(c) Inapplicable 312(a) 4.01 4.04 312(b) 4.04(c) 312(c) 4.04(c) 313(a) 4.03 313(b) 4.03 313(c) 4.03 313(d) 4.03 314(a) 4.0

July 31, 2024 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): July 31, 2024 Sage Therapeutics,

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, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission F

July 31, 2024 EX-10.3

Form of Restricted Stock Unit Agreement under the 2024 Equity Incentive Plan

EXHIBIT 10.3 Sage Therapeutics, Inc. RESTRICTED STOCK UNIT AGREEMENT Granted under 2024 Equity Incentive Plan Sage Therapeutics, Inc. (the “Company”) hereby grants the following restricted stock units to the recipient named below pursuant to its 2024 Equity Incentive Plan (as amended through the date hereof, the “Plan”). The terms and conditions attached hereto are also a part hereof and incorpora

July 31, 2024 EX-10.2

Form of Option Agreement under the 2024 Equity Incentive Plan

EXHIBIT 10.2 Sage Therapeutics, Inc. STOCK OPTION AGREEMENT Granted under 2024 Equity Incentive Plan Sage Therapeutics, Inc. (the “Company”) hereby grants the following stock option pursuant to its 2024 Equity Incentive Plan (as amended through the date hereof, the “Plan”). The terms and conditions attached hereto are also a part hereof. Notice of Grant Name of optionee (the “Participant”): Grant

July 31, 2024 10-Q

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 number: 001-36544 Sage The

July 31, 2024 EX-99.1

Sage Therapeutics Announces Second Quarter 2024 Financial Results and Highlights Pipeline and Business Progress Achieved $7.4 million in ZURZUVAE™ (zuranolone) collaboration revenue during the second quarter of 2024 (50% of the net revenues recorded

EX-99.1 Exhibit 99. 1 Sage Therapeutics Announces Second Quarter 2024 Financial Results and Highlights Pipeline and Business Progress Achieved $7.4 million in ZURZUVAE™ (zuranolone) collaboration revenue during the second quarter of 2024 (50% of the net revenues recorded by Biogen), representing 19% growth from the first quarter More than 1,400 prescriptions shipped and delivered during the second

July 31, 2024 EX-10.6

Amendment to Amended and Restated 2016 Inducement Equity Plan

EXHIBIT 10.6 SAGE THERAPEUTICS, INC. AMENDMENT NO. 1 TO AMENDED AND RESTATED 2016 INDUCEMENT EQUITY PLAN WHEREAS, Sage Therapeutics, Inc. (the “Company”) maintains the Amended and Restated 2016 Inducement Equity Plan (the “Plan”); and WHEREAS, the Board of Directors of the Company has determined that it is in the best interest of the Company and its stockholders to amend the Plan, pursuant to Sect

July 31, 2024 EX-10.5

Non-Employee Director Compensation Program, adopted June 10, 2024

EXHIBIT 10.5 Sage Therapeutics, Inc. Non-Employee Director Compensation Program The purpose of this Non-Employee Director Compensation Program (this “Program”) of Sage Therapeutics, Inc., a Delaware corporation (the “Company”), is to provide a total compensation package that enables the Company to attract and retain, on a long-term basis, high-caliber directors who are not employees or officers of

July 31, 2024 EX-10.4

Form of Non-Employee Director Option Agreement under the 2024 Equity Incentive Plan

EXHIBIT 10.4 FORM FOR DIRECTORS Sage Therapeutics, Inc. STOCK OPTION AGREEMENT Granted under 2024 Equity Incentive Plan Sage Therapeutics, Inc. (the “Company”) hereby grants the following stock option pursuant to its 2024 Equity Incentive Plan (as amended through the date hereof, the “Plan”). The terms and conditions attached hereto are also a part hereof. Notice of Grant Name of optionee (the “Pa

July 31, 2024 EX-10.1

2024 Equity Incentive Plan

EXHIBIT 10.1 SAGE THERAPEUTICS, INC. 2024 Equity INCENTIVE PLAN 1. Purpose The purpose of this 2024 Equity Incentive Plan (the “Plan”) of Sage Therapeutics, Inc., a Delaware corporation (the “Company”), is to advance the interests of the Company’s stockholders by enhancing the Company’s ability to attract, retain and motivate persons who are expected to make important contributions to the Company

July 24, 2024 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): July 24, 2024 Sage Therapeutics,

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 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission F

July 24, 2024 EX-99.1

Sage Therapeutics and Biogen Announce Topline Results from Phase 2 KINETIC 2 Study of SAGE-324 (BIIB124) for the Treatment of Essential Tremor

Exhibit 99.1 Sage Therapeutics and Biogen Announce Topline Results from Phase 2 KINETIC 2 Study of SAGE-324 (BIIB124) for the Treatment of Essential Tremor • SAGE-324 (BIIB124) did not demonstrate a statistically significant dose-response relationship on the primary endpoint in participants with essential tremor • No statistically significant differences were demonstrated between any dose of SAGE-

June 25, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Sage Therapeutics, Inc.

June 25, 2024 S-8

As filed with the Securities and Exchange Commission on June 25, 2024

As filed with the Securities and Exchange Commission on June 25, 2024 Registration No.

June 11, 2024 8-K

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): June 11, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission F

June 11, 2024 EX-99.1

Sage Therapeutics Announces Phase 2 SURVEYOR Study Reinforces Cognitive Impact of Huntington’s Disease The SURVEYOR Study met its primary endpoint demonstrating a statistically significant difference as measured by the HD-Cognitive Assessment Battery

Exhibit 99.1 Sage Therapeutics Announces Phase 2 SURVEYOR Study Reinforces Cognitive Impact of Huntington’s Disease The SURVEYOR Study met its primary endpoint demonstrating a statistically significant difference as measured by the HD-Cognitive Assessment Battery (HD-CAB) composite score at baseline between healthy participants and participants with Huntington’s Disease (HD) prior to any treatment

June 11, 2024 8-K

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): June 10, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission F

June 10, 2024 SC 13G/A

SAGE / Sage Therapeutics, 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.: 8)* Name of issuer: Sage Therapeutics Inc Title of Class of Securities: Common Stock CUSIP Number: 78667J108 Date of Event Which Requires Filing of this Statement: May 31, 2024 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Ru

June 6, 2024 SC 13G/A

SAGE / Sage Therapeutics, Inc. / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6 )* Sage Therapeutics, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 78667J108 (CUSIP Number) May 31, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sch

April 25, 2024 8-K

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): April 25, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

April 25, 2024 10-Q

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 number: 001-36544 Sage Th

April 25, 2024 EX-10.3

Severance and Change in Control Agreement between the Registrant and Anne Marie Cook, dated September 15, 2015, as amended.

Exhibit 10.3 SEVERANCE AND CHANGE IN CONTROL AGREEMENT This Severance and Change in Control Agreement (this “Agreement”) is made as of September 15, 2015 by and between Sage Therapeutics, Inc., a Delaware corporation (the ‘Company”), and Anne Marie Cook (the “Executive”) and shall become effective on the date of hire with the Company. 1. Purpose. The Company considers it essential to the best inte

April 25, 2024 EX-10.1

Office Lease Agreement between the Registrant and 55 Cambridge Parkway, LLC, dated January 22, 2024

EXHIBIT 10.1 OFFICE LEASE AGREEMENT BETWEEN 55 CAMBRIDGE PARKWAY, LLC, a Delaware limited liability company, AS LANDLORD AND SAGE THERAPEUTICS, INC., a Delaware corporation, AS TENANT AT 55 CAMBRIDGE PARKWAY, CAMBRIDGE, MA TABLE OF CONTENTS 1. Definitions and Basic Provisions 1 2. Lease Grant 1 3. Tender of Possession 1 (a) Tender of Possession 1 (b) Beneficial Occupancy 3 (c) Extension Option 3 4

April 25, 2024 EX-10.2

Offer letter by and between the Registrant and Anne Marie Cook, dated August 6, 2015

EXHIBIT 10.2 August 6, 2015 Confidential Anne Marie Cook Dear Anne Marie: At Sage, our mission is to make life better for patients with central nervous systems diseases by discovering, developing, and delivering important new medicines to the market. Our success results from our people creating products with benefits for patients coupled with our drive to excel in all areas of our business. On beh

April 25, 2024 EX-99.1

Sage Therapeutics Announces First Quarter 2024 Financial Results and Highlights Pipeline and Business Progress Achieved $6.2 million in ZURZUVAE™ (zuranolone) collaboration revenue during the first quarter of 2024, representing 50% of the net revenue

Exhibit 99.1 Sage Therapeutics Announces First Quarter 2024 Financial Results and Highlights Pipeline and Business Progress Achieved $6.2 million in ZURZUVAE™ (zuranolone) collaboration revenue during the first quarter of 2024, representing 50% of the net revenues reported by Biogen Encouraging initial demand for ZURZUVAE; More than 700 prescriptions shipped and delivered in the first quarter of 2

April 24, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 ☐ Confid

April 24, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 Prox

April 19, 2024 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): April 16, 2024 Sage Therapeutics,

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 16, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

April 19, 2024 EX-10.1

Amendment to Amended and Restated 2016 Inducement Equity Plan

Exhibit 10.1 SAGE THERAPEUTICS, INC. AMENDMENT NO. 1 TO AMENDED AND RESTATED 2016 INDUCEMENT EQUITY PLAN WHEREAS, Sage Therapeutics, Inc. (the “Company”) maintains the Amended and Restated 2016 Inducement Equity Plan (the “Plan”); and WHEREAS, the Board of Directors of the Company has determined that it is in the best interest of the Company and its stockholders to amend the Plan, pursuant to Sect

April 17, 2024 EX-99.1

Sage Therapeutics Announces Topline Results from Phase 2 PRECEDENT Study of Dalzanemdor (SAGE-718) in the Treatment of Mild Cognitive Impairment in Parkinson’s Disease

Exhibit 99.1 Sage Therapeutics Announces Topline Results from Phase 2 PRECEDENT Study of Dalzanemdor (SAGE-718) in the Treatment of Mild Cognitive Impairment in Parkinson’s Disease • In the Phase 2 PRECEDENT Study, dalzanemdor did not show statistically significant differences versus placebo on the primary endpoint in patients with mild cognitive impairment in Parkinson’s disease • Dalzanemdor (SA

April 17, 2024 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): April 17, 2024 Sage Therapeutics,

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 17, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

March 27, 2024 SC TO-I/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO (Amendment No. 4) (Rule 13e-4) Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subje

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO (Amendment No. 4) (Rule 13e-4) Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer) and Filing Person (Offeror)) Options to Purchase Common Stock, Par Value $0.0001 Per Share (Title of Class of Securities) 78667J10

March 26, 2024 8-K

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): March 20, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

February 21, 2024 SC TO-I/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO (Amendment No. 3) (Rule 13e-4) Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subje

SC TO-I/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO (Amendment No. 3) (Rule 13e-4) Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer) and Filing Person (Offeror)) Options to Purchase Common Stock, Par Value $0.0001 Per Share (Title of Class of Securities

February 14, 2024 SC TO-I/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO (Amendment No. 2) (Rule 13e-4) Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subje

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO (Amendment No. 2) (Rule 13e-4) Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer) and Filing Person (Offeror)) Options to Purchase Common Stock, Par Value $0.0001 Per Share (Title of Class of Securities) 78667J10

February 14, 2024 10-K

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

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 number: 001-36544 Sage Therapeut

February 14, 2024 S-8

As filed with the Securities and Exchange Commission on February 14, 2024

As filed with the Securities and Exchange Commission on February 14, 2024 Registration No.

February 14, 2024 EX-97

Compensation Recovery Policy of the Registrant

Exhibit 97 SAGE THERAPEUTICS, INC. Compensation Recovery Policy This Compensation Recovery Policy (this “Policy”) is adopted by Sage Therapeutics, Inc. (the “Company”), effective as of October 2, 2023 (the “Effective Date”). Capitalized terms used in this Policy shall have the meanings assigned to them in Section 3. 1. Application of this Policy. Subject to the terms of this Policy and the require

February 14, 2024 EX-21.1

Subsidiaries of the Registrant

Exhibit 21.1 SUBSIDIARIES Subsidiary Jurisdiction of Incorporation 1 Sage Securities Corporation Massachusetts 2 Sage (Bermuda) Ltd. Bermuda 3 Sage Therapeutics Limited England and Wales 4 Sage Therapeutics GmbH Switzerland 5 Sage Therapeutics GmbH Germany 6 Sage Therapeutics, Inc. Canada

February 14, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Sage Therapeutics, Inc.

February 14, 2024 8-K

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): February 14, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissi

February 14, 2024 SC 13G

SAGE / Sage Therapeutics, Inc. / RTW INVESTMENTS, LP - SAGE THERAPEUTICS, INC. Passive Investment

SC 13G 1 p24-0714sc13g.htm SAGE THERAPEUTICS, INC. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Sage Therapeutics, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 78667J108 (CUSIP Number) December 31, 2023 (Date of event which requires filing of this statement) Check

February 14, 2024 EX-99.1

Sage Therapeutics Announces Fourth Quarter and Full Year 2023 Financial Results and Highlights Pipeline and Business Progress ZURZUVAE™ (zuranolone), the first-and-only oral treatment indicated for adults with postpartum depression (PPD), became comm

Exhibit 99.1 Sage Therapeutics Announces Fourth Quarter and Full Year 2023 Financial Results and Highlights Pipeline and Business Progress ZURZUVAE™ (zuranolone), the first-and-only oral treatment indicated for adults with postpartum depression (PPD), became commercially available mid-December; Sage achieved $0.8 million in collaboration revenue as of December 31, 2023, 50% of the net revenues Bio

February 13, 2024 SC 13G/A

SAGE / Sage Therapeutics, Inc. / BB BIOTECH AG - SC 13G/A Passive Investment

SC 13G/A 1 d728625dsc13ga.htm SC 13G/A United States SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 (Amendment No. 1)* SCHEDULE 13G Under the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 78667J108 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing This Statement) Check the appropriate box to desig

February 13, 2024 SC 13G/A

SAGE / Sage Therapeutics, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01867-sagetherapeuticsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)* Name of issuer: Sage Therapeutics Inc Title of Class of Securities: Common Stock CUSIP Number: 78667J108 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to de

February 8, 2024 SC 13G/A

SAGE / Sage Therapeutics, Inc. / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5 )* Sage Therapeutics, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 78667J108 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate bo

January 31, 2024 SC TO-I/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO (Amendment No. 1) (Rule 13e-4) Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subje

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO (Amendment No. 1) (Rule 13e-4) Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer) and Filing Person (Offeror)) Options to Purchase Common Stock, Par Value $0.0001 Per Share (Title of Class of Securities) 78667J10

January 31, 2024 EX-99.(A)(1)(K)

Form of Email from Peter Castrichini to Employees, sent on January 31, 2024

Exhibit (a)(1)(K) To: Eligible Holders From: Peter Castrichini RE: Stockholders Approve the Stock Option Exchange Program All, Our stockholders approved the option exchange program! As you know, we launched the program on January 23, 2024, with the completion contingent on stockholder approval at today’s special meeting.

January 31, 2024 8-K

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 31, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

January 31, 2024 CORRESP

January 31, 2024

January 31, 2024 Rosemary G. Reilly +1 617 526 6633 (t) +1 617 526 5000 (f) [email protected] VIA EDGAR United States Securities and Exchange Commission Division of Corporate Finance 100 F Street, N.E. Washington, D.C. 20549 Attention: Christina Chalk Laura McKenzie Re: Sage Therapeutics, Inc. Schedule TO-I filed January 23, 2024 File No. 005-88275 Dear Ms. Chalk and Ms. McKenzie, On

January 24, 2024 8-K

Entry into a Material Definitive Agreement, 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): January 22, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

January 23, 2024 EX-99.(A)(1)(E)

Terms of Election

EX-99.(a)(1)(E) Exhibit (a)(1)(E) SAGE THERAPEUTICS, INC. TERMS OF ELECTION BY PARTICIPATING, YOU AGREE TO ALL TERMS OF THE OPTION EXCHANGE AS SET FORTH IN THE OFFER TO EXCHANGE ELIGIBLE OPTIONS FOR REPLACEMENT OPTIONS, DATED JANUARY 23, 2024 (AS IT MAY BE AMENDED AND SUPPLEMENTED FROM TIME TO TIME, THE “OFFER TO EXCHANGE”). ALL CAPITALIZED TERMS USED AND NOT DEFINED HEREIN SHALL HAVE THE MEANINGS

January 23, 2024 SC TO-I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO (Rule 13e-4) Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer

SC TO-I UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO (Rule 13e-4) Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 SAGE THERAPEUTICS, INC. (Name of Subject Company (Issuer) and Filing Person (Offeror)) Options to Purchase Common Stock, Par Value $0.0001 Per Share (Title of Class of Securities) 78667J108 (CUSIP N

January 23, 2024 EX-99.(A)(1)(G)

Form of Reminder Email

EX-99.(a)(1)(G) Exhibit (a)(1)(G) REMINDER EMAIL According to our records, you have not yet submitted an election in connection with Sage’s Option Exchange program. This email is to remind you that February 20, 2024 at 11:59 PM Eastern Time is the final deadline to participate in the Option Exchange. The Option Exchange deadline will be strictly enforced, so we encourage you to give yourself adequ

January 23, 2024 EX-99.(A)(1)(B)

Communication to Employees from Chief People and Experience Officer, sent December 8, 2023

EX-99.(a)(1)(B) Exhibit (a)(1)(B) To: Sage Employees From: Erin Lanciani RE: Proposal for a one-time Sage stock option exchange Hi everyone, In an effort to look at new ways to engage our people and ensure we have a competitive compensation program, I am pleased to share that our Board of Directors has approved a voluntary one-time Sage stock option exchange program, subject to stockholder approva

January 23, 2024 EX-99.(A)(1)(A)

Offer to Exchange Eligible Options for Replacement Options, dated January 23, 2024

EX-99.(a)(1)(A) Exhibit (a)(1)(A) OFFER TO EXCHANGE ELIGIBLE OPTIONS FOR REPLACEMENT OPTIONS SAGE THERAPEUTICS, INC. THIS OFFER AND WITHDRAWAL RIGHTS EXPIRE AT 11:59 P.M., EASTERN TIME, ON FEBRUARY 20, 2024 UNLESS THIS OFFER IS EXTENDED Unless the context requires otherwise, references in this Offer to Exchange to “Sage,” the “Company,” “we,” “us,” and “our” refer to Sage Therapeutics, Inc. Sage i

January 23, 2024 EX-99.(A)(1)(I)

Option Exchange Frequently Asked Questions

EX-99.(a)(1)(I) Exhibit (a)(1)(I) OPTION EXCHANGE FREQUENTLY ASKED QUESTIONS The following are answers to some of the questions that you may have about the Option Exchange. We urge you to read carefully the following questions and answers. Where applicable, we have included section references to the Offer to Exchange where you can find a more complete description of the topics in this question and

January 23, 2024 EX-99.(A)(1)(C)

Follow-up Email from Peter Castrichini to Employees, sent on January 23, 2024

EX-99.(a)(1)(C) Exhibit (a)(1)(C) To: Eligible Holders From: Peter Castrichini RE: One-time Sage Stock Option Exchange – Program Launch All, As you know from Erin’s email of December 8, 2023, our Board of Directors recently approved a voluntary one-time Sage stock option exchange program. Today we are formally launching the stock option exchange program. The completion of the option exchange progr

January 23, 2024 EX-99.(A)(1)(D)

Form of Announcement Email

EX-99.(a)(1)(D) Exhibit (a)(1)(D) Dear Sage Employees: IMPORTANT NEWS — PLEASE READ. IF YOU CHOOSE TO PARTICIPATE IN THE OPTION EXCHANGE, YOU MUST TAKE ACTION BY 11:59 PM EASTERN TIME ON FEBRUARY 20, 2024. We are pleased to announce that the stock option exchange program that you have previously received notice of (the “Option Exchange”) begins today. You are receiving this email because you are a

January 23, 2024 EX-99.(A)(1)(H)

Screenshots of Option Exchange Website

EX-99.(a)(1)(H) Exhibit (a)(1)(H) You have made the following elections with respect to your eligible stock options. Grant Number Grant Date DEMOGRANT1 2/1/2018 Award Type Options (NG) Grant Price Shares Underlying Option Grant Vested Options as of 2/20/2024” Exchange Ratio Replacement Options Election $192.33 198 198 5.00 40 Exchange DEMOGRANT2 4/2/2018 Options (ISO) $145.77 1,811 1,811 4.00 453

January 23, 2024 EX-99.(A)(1)(J)

Employee Presentation

EX-99.(a)(1)(J) Sage Option Exchange Program Overview January 2024 Exhibit (a)(1)(J) Background Stock Options Option Exchange Program Details Making Your Elections via the Option Exchange Portal Q&A Agenda Our equity program is an important element of our Total Rewards Philosophy Keeps us competitive Supports our long-term growth strategy Creates stronger link between pay and Company performance S

January 23, 2024 EX-FILING FEES

Filing Fee Table

EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables SCHEDULE TO (Form Type) SAGE THERAPEUTICS, INC.

January 23, 2024 EX-99.(A)(1)(F)

Form of Confirmation Email

EX-99.(a)(1)(F) Exhibit (a)(1)(F) Option Exchange Sage has received your election via the Sage Option Exchange website by which you elected to accept or reject Sage’s offer to exchange Eligible Options for Replacement Options with respect to some or all of your outstanding stock option grants, subject to the terms and conditions of the Offer to Exchange document that has been made available to you

January 8, 2024 EX-99.2

Sage Therapeutics to Provide Business Updates at 42nd Annual J.P. Morgan Healthcare Conference Excitement over December 2023 launch of ZURZUVAE™ (zuranolone), the first and only oral treatment indicated for adults with postpartum depression (PPD) Con

EX-99.2 Exhibit 99.2 Sage Therapeutics to Provide Business Updates at 42nd Annual J.P. Morgan Healthcare Conference Excitement over December 2023 launch of ZURZUVAE™ (zuranolone), the first and only oral treatment indicated for adults with postpartum depression (PPD) Continued progress on clinical pipeline, with topline data expected from multiple ongoing Phase 2 trials across 2024 Catalyst rich y

January 8, 2024 EX-99.1

Corporate Presentation dated January 2024.

EX-99.1 Exhibit 99.1

January 8, 2024 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 4, 2024 Sage Therapeutics

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 4, 2024 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

December 19, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 ☐ Confide

December 19, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

December 8, 2023 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

PRE 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

December 8, 2023 EX-99.2

Communication to Employees from Chief People and Experience Officer, sent December 8, 2023.

Exhibit 99.2 To: Sage Employees From: Erin Subject: Proposal for a one-time Sage stock option exchange In an effort to look at new ways to engage our people and ensure we have a competitive compensation program, I am pleased to share that our Board of Directors has approved a voluntary one-time Sage stock option exchange program, subject to stockholder approval, and has called a special meeting of

December 8, 2023 SC TO-C

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. ) Sage Therapeutics, Inc. (Name of Subject Company (Is

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. ) Sage Therapeutics, Inc. (Name of Subject Company (Issuer) and Filing Person (as Offeror)) Options to Purchase Common Stock, par value $0.0001 per share (Title of Class of Securities) 78667J108 (CUSIP Nu

November 7, 2023 424B5

$250,000,000 Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-261708 PROSPECTUS SUPPLEMENT (To prospectus dated December 17, 2021) $250,000,000 Common Stock We have entered into a sales agreement, or the sales agreement, with Cowen and Company, LLC, or TD Cowen, relating to shares of our common stock offered by this prospectus supplement and the accompanying prospectus. In accordance wit

November 7, 2023 EX-10.2

Master Consulting Agreement and Statement of Work between the Registrant and Albert J. Robichaud, Ph.D., dated September 15, 2023

EXHIBIT 10.2 MASTER CONSULTING AGREEMENT Albert J. Robichaud, Ph.D. Dear Dr. Robichaud: Sage Therapeutics, Inc. (“Sage”) would like to engage you to provide services commencing on September 15, 2023 (the “Effective Date”), under the following terms and conditions (the “Agreement”): 1. Description of Services. You will act as an independent consultant to Sage and use your best efforts to provide Se

November 7, 2023 8-K

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): November 7, 2023 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

November 7, 2023 EX-1.1

Sales Agreement, dated as of November 7, 2023, by and between the Company and Cowen and Company, LLC

Exhibit 1.1 SAGE THERAPEUTICS, INC. $250,000,000 SHARES OF COMMON STOCK, PAR VALUE $0.0001 PER SHARE SALES AGREEMENT November 7, 2023 Cowen and Company, LLC 599 Lexington Avenue New York, NY 10022 Ladies and Gentlemen: Sage Therapeutics, Inc. (the “Company”), confirms its agreement (this “Agreement”) with Cowen and Company, LLC (“Cowen”), as follows: 1. Issuance and Sale of Shares. The Company agr

November 7, 2023 8-K

Entry into a Material Definitive Agreement, 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): November 7, 2023 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

November 7, 2023 10-Q

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

l 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 number: 001-36544 S

November 7, 2023 EX-FILING FEES

Calculation of Filing Fee Tables Form 424(b)(5) (Form Type) Sage Therapeutics, 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 Ca

Exhibit 107 Calculation of Filing Fee Tables Form 424(b)(5) (Form Type) Sage Therapeutics, Inc.

November 7, 2023 EX-99.1

Sage Therapeutics Announces Third Quarter 2023 Financial Results and Highlights Pipeline and Business Progress ZURZUVAE™ (zuranolone), first and only oral treatment approved for adults with postpartum depression (PPD), designated Schedule IV by the D

Exhibit 99.1 Sage Therapeutics Announces Third Quarter 2023 Financial Results and Highlights Pipeline and Business Progress ZURZUVAE™ (zuranolone), first and only oral treatment approved for adults with postpartum depression (PPD), designated Schedule IV by the DEA; progressing towards planned commercial availability in December Announces expected wholesale acquisition cost of ZURZUVAE of $15,900

November 7, 2023 EX-10.1

Separation Agreement between the Registrant and Albert J. Robichaud, Ph.D., dated September 15, 2023

EXHIBIT 10.1 August 30, 2023 Revised September 15, 2023 By Email Albert J. Robichaud, Ph.D. Dear Dr. Robichaud: Given recent developments, we have made the difficult decision to restructure the business and reduce the size of our workforce. We appreciate your service and contributions and want to thank you for your dedication to always doing what’s best for patients. We would like to make this tra

August 31, 2023 8-K

Costs Associated with Exit or Disposal Activities, 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): August 28, 2023 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

August 7, 2023 S-8

As filed with the Securities and Exchange Commission on August 7, 2023

S-8 As filed with the Securities and Exchange Commission on August 7, 2023 Registration No.

August 7, 2023 EX-10.1

2014 Employee Stock Purchase Plan, as amended, dated June 15, 2023 (incorporated by reference to Exhibit 10.1 of the Registrant’s Quarterly Report on Form 10-Q (File No. 001-36544) filed on August 7, 2023)

EXHIBIT 10.1 SAGE THERAPEUTICS, INC. 2014 EMPLOYEE STOCK PURCHASE PLAN, AS AMENDED The purpose of the Sage Therapeutics, Inc. 2014 Employee Stock Purchase Plan (“the Plan”) is to provide eligible employees of Sage Therapeutics, Inc. (the “Company”) and each Designated Subsidiary (as defined in Section 11) with opportunities to purchase shares of the Company’s common stock, par value $0.0001 per sh

August 7, 2023 10-Q

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 number: 001-36544 Sage The

August 7, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Sage Therapeutics, Inc.

August 7, 2023 EX-99.1

ZURZUVAE™ (zuranolone) approved as first-and-only oral treatment specifically indicated for adults with postpartum depression (PPD) and on-track for planned launch in the fourth quarter of 2023 shortly after DEA scheduling Sage brain health pipeline

EX-99.1 Exhibit 99.1 Sage Therapeutics Announces Second Quarter 2023 Financial Results and Highlights Pipeline and Business Progress ZURZUVAE™ (zuranolone) approved as first-and-only oral treatment specifically indicated for adults with postpartum depression (PPD) and on-track for planned launch in the fourth quarter of 2023 shortly after DEA scheduling Sage brain health pipeline provides potentia

August 7, 2023 EX-10.4

Commercial License Agreement by and between the Registrant and CyDex Pharmaceuticals, Inc., dated August 21, 2013, as amended April 30, 2014

EXHIBIT 10.4 Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of information that the registrant treats as private or confidential. […***…] denotes omissions. COMMERCIAL LICENSE AGREEMENT This COMMERCIAL LICENSE AGREEMENT (this “Agreement”) is made this 21st day of August, 2013 (the “Effective Date”) between: CYDEX PHARMACEU

August 7, 2023 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): August 7, 2023 Sage Therapeutics,

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 7, 2023 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

August 7, 2023 EX-10.3

Amendment No. 3 to Supply Agreement, by and between the Registrant and CyDex Pharmaceuticals, Inc., dated September 25, 2015

EXHIBIT 10.3 Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of information that the registrant treats as private or confidential. […***…] denotes omissions. AMENDMENT NO. 3 TO SUPPLY AGREEMENT THIS AMENDMENT NO. 3 TO SUPPLY AGREEMENT (this “Amendment”) is entered into on this 25th day of September, 2015 (the “2015 Date”),

August 7, 2023 EX-10.5

Non-Exclusive License Agreement by and between the Registrant and the Regents of University of California, dated October 23, 2013, as amended May 14, 2014

EXHIBIT 10.5 Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of information that the registrant treats as private or confidential. […***…] denotes omissions. Non-Exclusive License Agreement between The Regents of the University of California and Sage Therapeutics, Inc. for Allopregnanolone in the Treatment of Status Epilept

August 7, 2023 EX-10.6

Exclusive License Agreement by and between the Registrant and Washington University, dated November 11, 2013

EXHIBIT 10.6 Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of information that the registrant treats as private or confidential. […***…] denotes omissions. EXCLUSIVE LICENSE AGREEMENT PREAMBLE This Agreement is made and entered into, effective as of November 11, 2013 (“Effective Date”), by and between: Washington Universi

August 7, 2023 EX-10.2

Form of Performance-Based Restricted Stock Unit Award Agreement Under the Sage Therapeutics, Inc. 2014 Stock Option and Incentive Plan (incorporated by reference to Exhibit 10.2 of the Registrant’s Quarterly Report on Form 10-Q (File No. 001-36544) filed on May 2, 2023)

EXHIBIT 10.2 Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of information that the registrant treats as private or confidential. […***…] denotes omissions. SUPPLY AGREEMENT THIS SUPPLY AGREEMENT (this “Agreement”) is made this 13th day of December, 2012 (the “Effective Date”) between: CYDEX PHARMACEUTICALS, INC., a Delawa

July 10, 2023 SC 13G/A

SAGE / Sage Therapeutics Inc / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4 )* Sage Therapeutics, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 78667J108 (CUSIP Number) June 30, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

June 16, 2023 EX-3.1

Amended and Restated Bylaws of the Registrant, as currently in effect (incorporated by reference to Exhibit 3.1 of the Registrant’s Quarterly Report on Form 10-Q (File No. 001-36544) filed on June 16, 2023)

EX-3.1 Exhibit 3.1 AMENDED AND RESTATED BYLAWS OF SAGE THERAPEUTICS, INC. (the “Corporation”) ARTICLE I Stockholders SECTION 1. Annual Meeting. The annual meeting of stockholders (any such meeting being referred to in these Bylaws as an “Annual Meeting”) shall be held at the hour, date and place, if any, within or without the United States which is fixed by the Corporation’s Board of Directors (th

June 16, 2023 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): June 15, 2023 Sage Therapeutics,

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 15, 2023 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission F

June 7, 2023 DEFA14A

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

May 2, 2023 EX-99.1

Sage Therapeutics Announces First Quarter 2023 Financial Results and Highlights Pipeline and Business Progress New Drug Application (NDA) for zuranolone in the treatment of Major Depressive Disorder (MDD) and Postpartum Depression (PPD) under priorit

EX-99.1 Exhibit 99.1 Sage Therapeutics Announces First Quarter 2023 Financial Results and Highlights Pipeline and Business Progress New Drug Application (NDA) for zuranolone in the treatment of Major Depressive Disorder (MDD) and Postpartum Depression (PPD) under priority review by U.S. Food and Drug Administration (FDA) with a PDUFA date of August 5, 2023 Sage and Biogen progressing key commercia

May 2, 2023 EX-10

Form of Performance-Based Restricted Stock Unit Award Agreement Under the Sage Therapeutics, Inc. 2014 Stock Option and Incentive Plan

EXHIBIT 10.2 PERFORMANCE-BASED RESTRICTED STOCK UNIT AWARD AGREEMENT UNDER THE SAGE THERAPEUTICS, INC. 2014 STOCK OPTION AND INCENTIVE PLAN Name of Grantee: ###PARTICIPANTNAME### Target No. of Performance-based Restricted Stock Units: ###TOTALAWARDS### Grant Date: ###GRANTDATE### [Performance Period: []] Pursuant to the Sage Therapeutics, Inc. 2014 Stock Option and Incentive Plan as amended throug

May 2, 2023 10-Q

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 number: 001-36544 Sage Th

May 2, 2023 EX-10

Amended and Restated Non-Employee Director Compensation Policy, dated March 23, 2023

EXHIBIT 10.1 Sage Therapeutics, Inc. Amended and Restated Non-Employee Director Compensation Policy The purpose of this Amended and Restated Non-Employee Director Compensation Policy (this “Policy”) of Sage Therapeutics, Inc., a Delaware corporation (the “Company”), is to provide a total compensation package that enables the Company to attract and retain, on a long-term basis, high-caliber directo

May 2, 2023 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): May 2, 2023 Sage Therapeutics, In

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 2, 2023 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission Fil

April 27, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

DEFA14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 27, 2023 DEF 14A

Sage Therapeutics, Inc. 2014 Employee Stock Purchase Plan, as amended, incorporated herein by reference to Appendix A to the Definitive Proxy Statement, filed with the Securities and Exchange Commission on April 27, 2023.

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMIS S IO N Washington, D.

March 16, 2023 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): March 15, 2023 Sage Therapeutics,

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 15, 2023 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

February 17, 2023 SC 13G

SAGE / SAGE Therapeutics Inc / BB BIOTECH AG - SC 13G Passive Investment

SC 13G United States SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Sage Therapeutics, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 78667J108 (CUSIP Number) February 9, 2023 (Date of Event Which Requires Filing This Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is fil

February 17, 2023 EX-99.B

POWER OF ATTORNEY

EX-99.B 3 d459172dex99b.htm EX-99.B Exhibit B POWER OF ATTORNEY The Undersigned, Hugo van Neutegem herewith gives Power of Attorney to Mrs. Nathalie M.A. Isidora-Kwidama, born in Curacao on, holder of a passport issued by the Kingdom of the Netherlands, with number, to represent the Company in the broadest sense of the word and in the best interest of the Company and further to do if were the Unde

February 17, 2023 EX-99.A

Joint Filing Statement

EX-99.A 2 d459172dex99a.htm EX-99.A Exhibit A Joint Filing Statement We, the undersigned, hereby express our agreement that the attached Schedule 13G (including all amendments thereto) is filed on behalf of each of the undersigned. BB Biotech AG Date: February 17, 2023 By: /s/ Martin Gubler Signatory Authority Name: Martin Gubler Title: Signatory Authority Date: February 17, 2023 By: /s/ Ivo Betsc

February 16, 2023 EX-21

Subsidiaries of the Registrant

Exhibit 21.1 SUBSIDIARIES Subsidiary Jurisdiction of Incorporation 1 Sage Securities Corporation Massachusetts 2 Sage (Bermuda) Ltd. Bermuda 3 Sage Therapeutics Limited England and Wales 4 Sage Therapeutics GmbH Switzerland 5 Sage Therapeutics GmbH Germany 6 Sage Therapeutics, Inc. Canada

February 16, 2023 S-8

Power of Attorney (included on the signature pages of this registration statement)

S-8 As filed with the Securities and Exchange Commission on February 16, 2023 Registration No.

February 16, 2023 EX-10

Severance and Change in Control Agreement between the Registrant and Laura Gault, dated October 18, 2022, as amended (incorporated by reference to Exhibit 10.40 of the Registrant’s Annual Report on Form 10-K (File No. 001-36544) filed on February 16, 2023)

EXHIBIT 10.40 SEVERANCE AND CHANGE IN CONTROL AGREEMENT This Severance and Change in Control Agreement (this “Agreement”) is made as of 10/18/2022 by and between Sage Therapeutics, Inc., a Delaware corporation (the “Company”), and Laura Gault (the “Executive”) and shall become effective on the date of hire with the Company. 1. Purpose. The Company considers it essential to the best interests of it

February 16, 2023 EX-10

Biogen Collaboration and License Agreement by and among the Registrant, Biogen MA Inc. and Biogen International GmbH, dated November 27, 2020 (incorporated by reference to Exhibit 10.30 of the Registrant’s Register Statement on Form 10-K (File No. 001-36544) filed on February 16, 2023)

Execution Version Exhibit 10.30 Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of information that the registrant treats as private or confidential. Double asterisks denote omissions. Collaboration and License Agreement Between Sage Therapeutics, Inc., Biogen MA Inc. and Biogen International GmbH Dated November 27, 2020 IF

February 16, 2023 8-K

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 16, 2023 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissi

February 16, 2023 EX-10

CNS Innovation Advisory Board Consulting Agreement between the Registrant and Jeff Jonas, dated November 8, 2022

EXHIBIT 10.41 CNS INNOVATION ADVISORY BOARD CONSULTING AGREEMENT Jeffrey M. Jonas, M.D. Dear Dr. Jonas: Sage Therapeutics, Inc. (“Sage”) would like to engage you to provide services as a member of Sage’s CNS Innovation Advisory Board commencing on November 8, 2022 (the “Effective Date”), under the following terms and conditions (the “Agreement”): 1. Description of Services. You will serve as membe

February 16, 2023 EX-99.1

Sage Therapeutics Announces Fourth Quarter and Full Year 2022 Financial Results and Highlights Pipeline and Business Progress U.S. Food and Drug Administration (FDA) accepts filing of New Drug Application (NDA) for zuranolone and grants Priority Revi

Exhibit 99.1 Sage Therapeutics Announces Fourth Quarter and Full Year 2022 Financial Results and Highlights Pipeline and Business Progress U.S. Food and Drug Administration (FDA) accepts filing of New Drug Application (NDA) for zuranolone and grants Priority Review in the treatment of Major Depressive Disorder (MDD) and Postpartum Depression (PPD) following submission of rolling NDA in December 20

February 16, 2023 10-K

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

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 number: 001-36544 Sage Therapeut

February 16, 2023 EX-10

Amended and Restated Non-Employee Director Compensation Policy, dated December 16, 2022

EXHIBIT 10.42 Sage Therapeutics, Inc. Amended and Restated Non-Employee Director Compensation Policy The purpose of this Amended and Restated Non-Employee Director Compensation Policy (this “Policy”) of Sage Therapeutics, Inc., a Delaware corporation (the “Company”), is to provide a total compensation package that enables the Company to attract and retain, on a long-term basis, high-caliber direct

February 16, 2023 EX-10

Severance and Change In Control Agreement between the Registrant and Christopher Benecchi, dated September 13, 2021, as amended (incorporated by reference to Exhibit 10.36 of the Registrant’s Register Statement on Form 10-K (File No. 001-36544) filed on February 16, 2023)

EXHIBIT 10.36 SEVERANCE AND CHANGE IN CONTROL AGREEMENT This Severance and Change in Control Agreement (this “Agreement”) is made as of September 13, 2021 by and between Sage Therapeutics, Inc., a Delaware corporation (the “Company”), and Christopher Benecchi (the “Executive”) and shall become effective on the date of hire with the Company. 1. Purpose. The Company considers it essential to the bes

February 16, 2023 EX-10

Offer Letter by and between the Registrant and Laura Gault, dated October 18, 2022 (incorporated by reference to Exhibit 10.39 of the Registrant’s Register Statement on Form 10-K (File No. 001-36544) filed on February 16, 2023)

EX-10 6 sage-ex1039.htm EX-10.39 EXHIBIT 10.39 October 13, 2022 Laura M. Gault, M.D., Ph.D. Dear Laura: At Sage, our mission is to pioneer solutions to deliver life-changing brain health medicines, so every person can thrive. Our success results from our people creating therapeutics with benefits for patients coupled with our drive to excel in all areas of our business together. On behalf of Sage

February 16, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Sage Therapeutics, Inc.

February 16, 2023 EX-10

Severance and Change In Control Agreement between the Registrant and Albert J. Robichaud, dated September 25, 2014, as amended

EXHIBIT 10.16 SEVERANCE AND CHANGE IN CONTROL AGREEMENT This Severance and Change in Control Agreement (this “Agreement”) is made as of September 25, 2014 by and between Sage Therapeutics, Inc., a Delaware corporation (the “Company”), and Albert Robichaud (the “Executive”) and shall become effective on the date of the effectiveness of the Company’s registration statement on Form S-1 under the Secu

February 16, 2023 EX-10

Severance and Change In Control Agreement between the Registrant and Kimi Iguchi, dated September 30, 2014, as amended (incorporated by reference to Exhibit 10.15 of the Registrant’s Register Statement on Form 10-K (File No. 001-36544) filed on February 16, 2023)

EXHIBIT 10.15 SEVERANCE AND CHANGE IN CONTROL AGREEMENT This Severance and Change in Control Agreement (this “Agreement”) is made as of September 30, 2014 by and between Sage Therapeutics, Inc., a Delaware corporation (the “Company”), and Kimi Iguchi (the “Executive”) and shall become effective on the date of the effectiveness of the Company’s registration statement on Form S-1 under the Securitie

February 14, 2023 SC 13G/A

SAGE / SAGE Therapeutics Inc / BB BIOTECH AG - SC 13G/A Passive Investment

SC 13G/A 1 d401650dsc13ga.htm SC 13G/A United States SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Sage Therapeutics, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 78667J108 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing This Statement) Check the appropriate box to desig

February 14, 2023 EX-99.B

POWER OF ATTORNEY

EX-99.B 2 d401650dex99b.htm EX-99.B Exhibit B POWER OF ATTORNEY The Undersigned, Hugo van Neutegem herewith gives Power of Attorney to Mrs. Nathalie M.A. Isidora-Kwidama, born in Curacao on, holder of a passport issued by the Kingdom of the Netherlands, with number, to represent the Company in the broadest sense of the word and in the best interest of the Company and further to do if were the Unde

February 9, 2023 SC 13G/A

SAGE / SAGE Therapeutics Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01837-sagetherapeuticsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 6)* Name of issuer: Sage Therapeutics Inc. Title of Class of Securities: Common Stock CUSIP Number: 78667J108 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to d

February 6, 2023 EX-99.1

Sage Therapeutics and Biogen Announce FDA Accepts Filing of New Drug Application and Grants Priority Review of Zuranolone in the Treatment of Major Depressive Disorder and Postpartum Depression Zuranolone is being evaluated as a potential 14-day, rap

Exhibit 99.1 Sage Therapeutics and Biogen Announce FDA Accepts Filing of New Drug Application and Grants Priority Review of Zuranolone in the Treatment of Major Depressive Disorder and Postpartum Depression Zuranolone is being evaluated as a potential 14-day, rapid-acting, once-daily, oral medication to treat major depressive disorder (MDD) and postpartum depression (PPD) Depression is a public he

February 6, 2023 8-K

Financial Statements and Exhibits, 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 6, 2023 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

February 6, 2023 SC 13G/A

SAGE / SAGE Therapeutics Inc / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3 )* Sage Therapeutics, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 78667J108 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which thi

January 9, 2023 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 8, 2023 Sage Therapeutics

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 8, 2023 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

January 9, 2023 EX-99.2

Sage Therapeutics to Provide Update on 2023 Key Initiatives at 41st Annual J.P. Morgan Healthcare Conference Robust pipeline provides potential for long-term value creation, establishing Sage as a leader in brain health Rolling New Drug Application (

Exhibit 99.2 Sage Therapeutics to Provide Update on 2023 Key Initiatives at 41st Annual J.P. Morgan Healthcare Conference Robust pipeline provides potential for long-term value creation, establishing Sage as a leader in brain health Rolling New Drug Application (NDA) submission for zuranolone in MDD and PPD complete, with potential for PDUFA date as early as the third quarter of 2023 if priority r

January 9, 2023 EX-99.1

Safe Harbor Statement • The slides presented today and the accompanying oral presentations contain forward-looking – At any stage, regulatory authorities may ask for additional clinical trials, nonclinical studies or other data in order for us to pro

Exhibit 99.1 J.P. Morgan Healthcare Conference January 2023 Safe Harbor Statement • The slides presented today and the accompanying oral presentations contain forward-looking – At any stage, regulatory authorities may ask for additional clinical trials, nonclinical studies or other data in order for us to proceed further in development or to file for or obtain regulatory statements, which may be i

December 6, 2022 EX-99.1

Sage Therapeutics and Biogen Complete Rolling Submission of New Drug Application for Zuranolone in the Treatment of Major Depressive Disorder and Postpartum Depression Zuranolone is being evaluated as a short course, rapid-acting, oral medication for

EX-99.1 Exhibit 99.1 Sage Therapeutics and Biogen Complete Rolling Submission of New Drug Application for Zuranolone in the Treatment of Major Depressive Disorder and Postpartum Depression Zuranolone is being evaluated as a short course, rapid-acting, oral medication for major depressive disorder (MDD) and postpartum depression (PPD) Cambridge, Mass. – Dec. 6, 2022 – Sage Therapeutics, Inc. (Nasda

December 6, 2022 8-K

Financial Statements and Exhibits, 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): December 6, 2022 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

November 8, 2022 8-K

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): November 8, 2022 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commissio

November 8, 2022 EX-99.1

Sage Therapeutics Announces Third Quarter 2022 Financial Results and Highlights Pipeline and Business Progress Completion of rolling NDA submission for zuranolone in MDD and PPD on track for December 2022 Presented additional data across pipeline pro

Exhibit 99.1 Sage Therapeutics Announces Third Quarter 2022 Financial Results and Highlights Pipeline and Business Progress Completion of rolling NDA submission for zuranolone in MDD and PPD on track for December 2022 Presented additional data across pipeline programs at key medical congresses including data on zuranolone as an investigational oral, once-daily, 14-day treatment for MDD and PPD Com

November 8, 2022 10-Q

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 number: 001-36544 Sag

August 2, 2022 10-Q

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 number: 001-36544 Sage Thera

August 2, 2022 EX-FILING FEES

Filing Fee Table

EX-FILING FEES 4 d334027dexfilingfees.htm EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Sage Therapeutics, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1—Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate A

August 2, 2022 EX-10.2

2014 Employee Stock Purchase Plan, as amended, dated June 16, 2022 (incorporated by reference to Exhibit 10.2 of the Registrant’s Quarterly Report on Form 10-Q (File No. 001-36544) filed on August 2, 2022)

EXHIBIT 10.2 SAGE THERAPEUTICS, INC. 2014 EMPLOYEE STOCK PURCHASE PLAN, AS AMENDED The purpose of the Sage Therapeutics, Inc. 2014 Employee Stock Purchase Plan (?the Plan?) is to provide eligible employees of Sage Therapeutics, Inc. (the ?Company?) and each Designated Subsidiary (as defined in Section 11) with opportunities to purchase shares of the Company?s common stock, par value $0.0001 per sh

August 2, 2022 8-K

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): August 2, 2022 Sage Therapeutics, Inc. (Exact name of registrant as specified in its charter) DELAWARE 001-36544 27-4486580 (State or other jurisdiction of incorporation) (Commission

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