Laboratory Apparatus And Analytical, Optical, Measuring, and Controlling Instruments - Latest Activist Disclosures

This table shows recent activist investor (Schedule 13D) filings made in this industry. Any investor or hedge fund that makes an investment with the intention of influencing management is considered an activist investor and must file a 13D.

Date Form Target Company Investor Shares Ownership
(Percent)		 Ownership Change
(Percent)
2025-08-22 13D/A SCND / Scientific Industries, Inc. Pessin Sandra F 570,000 4.70 22.18
2025-08-19 13D RPID / Rapid Micro Biosystems, Inc. Spignesi Robert G Jr 2,647,256 6.30
2025-08-01 13D/A MSAI / MultiSensor AI Holdings, Inc. Strahan Gary Eugene 3,315,093 9.90 0.00
2025-07-29 13D/A MSAI / MultiSensor AI Holdings, Inc. Strahan Gary Eugene 3,315,093 9.90 -45.80
2025-07-18 13D/A BIO / Bio-Rad Laboratories, Inc. Schwartz Alice N 2,732,073 12.30 -40.03
2025-07-15 13D/A QTRX / Quanterix Corporation Kent Lake PR LLC 2,089,500 4.50 -21.00
2025-06-24 13D/A NAUT / Nautilus Biotechnology, Inc. Perceptive Advisors Llc 12,815,113 10.10 1.75
2025-05-01 13D/A MSAI / MultiSensor AI Holdings, Inc. 325 Capital Master Fund LP 9,408,636 28.20
2025-04-30 13D/A QTRX / Quanterix Corporation Akoya Biosciences, Inc. 0 0.00 -100.00
2025-04-23 13D/A SCND / Scientific Industries, Inc. Pessin Sandra F 466,507 3.90 10.80
2025-04-22 13D/A SCND / Scientific Industries, Inc. Bleichroeder LP 2,965,026 22.69 20.28
2025-04-18 13D LCTC / Lifeloc Technologies, Inc. Edco Partners Lllp 2,134,245 77.54 12.78
2025-03-21 13D/A SCND / Scientific Industries, Inc. Bleichroeder LP 2,465,026 20.95 0.00
2025-03-05 13D/A NAUT / Nautilus Biotechnology, Inc. Mallick Parag 22,263,911 17.40
2025-03-05 13D/A NAUT / Nautilus Biotechnology, Inc. Patel Sujal M 20,297,732 15.70
2025-03-03 13D/A QTRX / Quanterix Corporation Kent Lake PR LLC 2,645,086 6.90 16.12
2025-02-19 13D/A CLIR / ClearSign Technologies Corporation clirSPV LLC 2,249,027 4.30 -77.68
2025-02-13 13D QTRX / Quanterix Corporation Kent Lake PR LLC 2,277,954 5.91
2025-02-05 13D/A KEQU / Kewaunee Scientific Corporation Zucker Anita G 193,876 6.80 -12.42
2025-01-31 13D/A NAUT / Nautilus Biotechnology, Inc. Perceptive Advisors Llc 12,594,211 10.00 0.00
2025-01-16 13D QTRX / Quanterix Corporation Akoya Biosciences, Inc. 2,955,532 6.20
2024-12-31 13D/A QSI / Quantum-Si incorporated Rothberg Jonathan M 19,937,500 100.00 11.11
2024-12-18 13D/A MIR / Mirion Technologies, Inc. GSAM Holdings LLC 5,187,419 2.30 -80.96
2024-11-14 13D/A NAUT / Nautilus Biotechnology, Inc. Perceptive Advisors Llc 12,594,211 10.00 0.00
2024-11-13 13D/A MIR / Mirion Technologies, Inc. Goldman Sachs Group Inc 12,387,666 5.50 -17.43
2024-11-13 13D/A SCND / Scientific Industries, Inc. Bleichroeder LP 2,465,026 20.95 0.00
2024-11-06 13D/A MIR / Mirion Technologies, Inc. Goldman Sachs Group Inc 15,003,465 6.70 -19.98
2024-11-06 13D ALNT / Allient Inc. Juniper Investment Company, LLC 869,149 5.20
2024-10-10 13D/A TLIS / Talis Biomedical Corporation Baker Bros. Advisors Lp 2,507,193 65.60 -93.33
2024-09-25 13D/A MSAI / MultiSensor AI Holdings, Inc. 325 Capital Llc 9,383,969 30.10 238.46
2024-09-17 13D/A QSI / Quantum-Si incorporated Rothberg Jonathan M 17,943,750 90.00 0.00
2024-08-22 13D/A OWLT / Owlet, Inc. Eclipse Continuity GP I, LLC 7,567,901 48.90 8.03
2024-08-22 13D/A OWLTW / Owlet, Inc. - Equity Warrant Trilogy Equity Partners, LLC 2,493,225 18.70
2024-08-01 13D/A MIR / Mirion Technologies, Inc. Goldman Sachs Group Inc 18,750,287 8.30 -13.15
2024-07-03 13D MSAI / MultiSensor AI Holdings, Inc. 325 Capital Llc 2,772,561 11.60
2024-06-26 13D/A CLIR / ClearSign Technologies Corporation clirSPV LLC 10,074,340 19.99 54.99
2024-06-06 13D/A MIR / Mirion Technologies, Inc. Goldman Sachs Group Inc 21,588,585 9.60 -21.18
2024-04-16 13D/A APM / Aptorum Group Limited Lui Darren 533,575 14.50 18.64
2024-03-13 13D/A BCHT / Birchtech Corp. Alterna Core Capital Assets Fund II, L.P. 9,300,000 9.86 -20.51
2024-03-07 13D/A COHR / Coherent Corp. BCPE Watson (DE) BML, LP 28,111,651 15.60
2024-03-04 13D/A OWLT / Owlet, Inc. Eclipse Continuity GP I, LLC 7,005,670 48.90 -31.85
2024-03-01 13D/A OWLT / Owlet, Inc. Trilogy Equity Partners, LLC 2,493,225 23.90 -89.84
2024-02-21 13D/A ELSE / Electro-Sensors, Inc. Peterson Lynne Elizabeth 350,893 10.20 -0.01
2024-02-14 13D ELSE / Electro-Sensors, Inc. Peterson Lynne Elizabeth 350,938 10.20
2024-02-14 13D ELSE / Electro-Sensors, Inc. Peterson Patricia Nancy 364,768 10.60
2024-02-14 13D ELSE / Electro-Sensors, Inc. Peterson Jeffrey Dean 353,438 10.30
2024-02-14 13D ELSE / Electro-Sensors, Inc. Peterson John Eberhart 350,893 10.20
2024-02-14 13D ELSE / Electro-Sensors, Inc. Peterson Paul Rodney 350,893 10.20
2024-02-08 13D/A OWLT / Owlet, Inc. Eclipse Continuity GP I, LLC 10,280,063 61.10 -72.21
2024-02-05 13D/A CLIR / ClearSign Technologies Corporation clirSPV LLC 6,500,029 16.80 -14.28