Laboratory Analytical 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)
2026-06-04 13D/A NAUT / Nautilus Biotechnology, Inc. AH Bio Fund II, L.P. 12,653,917 9.90
2026-04-13 13D/A SEER / Seer, Inc. Radoff Family Foundation 2,610,232 4.60 0.00
2026-03-23 13D HBIO / Harvard Bioscience, Inc. BroadOak Income Fund, L.P. 846,000 15.97
2026-03-04 13D/A NAUT / Nautilus Biotechnology, Inc. Patel Sujal M 21,249,965 16.30 4.69
2026-03-04 13D/A NAUT / Nautilus Biotechnology, Inc. Mallick Parag 22,557,411 17.60 1.32
2026-03-02 13D/A SEER / Seer, Inc. Radoff Family Foundation 2,610,232 4.60 24.30
2026-02-20 13D SEER / Seer, Inc. Radoff Family Foundation 2,100,000 3.70
2026-02-11 13D/A COHR / Coherent Corp. BCPE Watson (DE) BML, LP 0 0.00 -100.00
2025-12-12 13D/A COHR / Coherent Corp. BCPE Watson (DE) BML, LP 9,775,846 5.20 -34.25
2025-12-04 13D/A COHR / Coherent Corp. BCPE Watson (DE) BML, LP 14,868,245 7.90 0.00
2025-11-24 13D/A COHR / Coherent Corp. BCPE Watson (DE) BML, LP 14,868,245 7.90 -33.53
2025-11-14 13D/A SCND / Scientific Industries, Inc. Bleichroeder LP 2,715,026 21.19 -8.43
2025-11-12 13D/A COHR / Coherent Corp. BCPE Watson (DE) BML, LP 22,368,245 11.90 -20.43
2025-10-30 13D/A BIO / Bio-Rad Laboratories, Inc. Norman D. Schwartz 4,929,036 97.20 0.00
2025-10-30 13D/A BIO / Bio-Rad Laboratories, Inc. Norman D. Schwartz 3,228,922 14.60 -34.49
2025-10-28 13D/A BIO / Bio-Rad Laboratories, Inc. Norman D. Schwartz 4,929,036 97.20
2025-10-28 13D/A BIO / Bio-Rad Laboratories, Inc. Norman D. Schwartz 3,228,922 14.60
2025-10-07 13D/A ASTC / Astrotech Corporation BML Investment Partners, L.P. 0 0.00 -100.00
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
2025-07-18 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
2025-04-30 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
2025-02-13 13D QTRX / Quanterix Corporation Kent Lake PR LLC 2,277,954 5.91
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
2024-11-14 13D/A NAUT / Nautilus Biotechnology, Inc. Perceptive Advisors Llc 12,594,211 10.00 0.00
2024-11-13 13D/A SCND / Scientific Industries, Inc. Bleichroeder LP 2,465,026 20.95 0.00
2024-03-07 13D/A COHR / Coherent Corp. BCPE Watson (DE) BML, LP 28,111,651 15.60
2023-12-29 13D SCND / Scientific Industries, Inc. Veradace Capital Management LLC 1,452,717 13.56
2023-12-15 13D SCND / Scientific Industries, Inc. Bleichroeder LP 2,465,026 22.61 172.37
2023-12-08 13D/A EYPT / EyePoint, Inc. EW Healthcare Partners, L.P. 2,337,786 5.00 -35.96
2023-11-17 13D/A NAUT / Nautilus Biotechnology, Inc. Perceptive Advisors Llc 12,594,211 10.10 41.33
2023-09-19 13D/A CTKB / Cytek Biosciences, Inc. Ra Capital Management, L.p. 6,809,404 4.99 -48.18
2023-08-30 13D/A EYPT / EyePoint, Inc. EW Healthcare Partners, L.P. 3,650,392 10.40 -91.29
2023-06-26 13D ASTC / Astrotech Corporation BML Investment Partners, L.P. 232,065 13.70 0.00
2023-03-01 13D/A NAUT / Nautilus Biotechnology, Inc. Nautilus Biotechnology, Inc. 18,947,732 15.00
2023-02-15 13D/A SCND / Scientific Industries, Inc. Eddleman Roy T 2,127,264 26.93 0.00
2022-08-29 13D/A RPID / Rapid Micro Biosystems, Inc. Kennedy Lewis Management Lp 5,179,061 14.10 0.00
2022-08-15 13D/A SEER / Seer, Inc. Maverick Capital Management Llc 2,373,382 4.10 -23.73
2022-06-30 13D RPID / Rapid Micro Biosystems, Inc. Kennedy Lewis Management Lp 5,179,061 14.10 3.57
2022-04-11 13D/A BIO.B / Bio-Rad Laboratories, Inc. Schwartz Alice N 4,555,452 89.70