Medical Laboratories - 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)
2026-05-27 13D/A FLGT / Fulgent Genetics, Inc. Hsieh Ming 8,872,539 32.26 0.06
2026-03-31 13D/A FLGT / Fulgent Genetics, Inc. Hsieh Ming 8,867,303 30.74 1.56
2026-03-24 13D/A CELC / Celcuity Inc. Baker Bros. Advisors Lp 9,582,874 19.99 23.72
2026-03-09 13D/A CELC / Celcuity Inc. Growth Equity Opportunities 18 VGE, LLC 2,285,561 4.90 -21.47
2026-02-23 13D/A RNLXY / Renalytix Plc - Depositary Receipt (Common Stock) Jefferson River Capital Llc 19,644,391 4.50
2026-01-27 13D/A BDSX / Biodesix, Inc. Schuler Jack W 2,333,945 24.00 8.48
2026-01-16 13D/A CELC / Celcuity Inc. Growth Equity Opportunities 18 VGE, LLC 2,910,561 6.30 -17.68
2025-12-16 13D/A AMS / American Shared Hospital Services Ruffle John F 0 0.00 -100.00
2025-12-09 13D/A AMS / American Shared Hospital Services Stachowiak Raymond C 1,560,737 23.70 5.62
2025-09-23 13D/A BDSX / Biodesix, Inc. Schuler Jack W 2,151,480 27.00
2025-09-12 13D/A PSNL / Personalis, Inc. Tempus Labs, Inc. 12,868,800 14.50 0.00
2025-09-03 13D/A BDSX / Biodesix, Inc. Schuler Jack W 39,821,357 26.00 9.60
2025-08-18 13D/A CELC / Celcuity Inc. Growth Equity Opportunities 18 VGE, LLC 3,535,561 8.10 132.60
2025-08-01 13D CELC / Celcuity Inc. Baker Bros. Advisors Lp 7,745,692 18.90 81.92
2025-05-20 13D/A BDSX / Biodesix, Inc. Schuler Jack W 36,332,985 24.70 16.65
2025-05-12 13D/A FTRE / Fortrea Holdings Inc. Starboard Value LP 2,716,421 3.00 -44.15
2025-05-09 13D/A AMS / American Shared Hospital Services Zucker Anita G 586,468 9.10 15.42
2025-03-07 13D/A AMS / American Shared Hospital Services Zucker Anita G 508,117 7.90 53.44
2025-02-24 13D/A FTRE / Fortrea Holdings Inc. Starboard Value LP 4,864,000 5.40
2025-02-14 13D/A SERA / Sera Prognostics, Inc. Chione Ltd 2,605,351 7.60 31.56
2025-02-14 13D SERA / Sera Prognostics, Inc. Baker Bros. Advisors Lp 5,498,170 16.10 1.17
2025-01-31 13D/A FTRE / Fortrea Holdings Inc. Starboard Value LP 5,199,000 5.80 -31.55
2025-01-03 13D/A AMS / American Shared Hospital Services Stachowiak Raymond C 1,477,737 22.80 6.33
2024-11-20 13D AMS / American Shared Hospital Services Zucker Anita G 331,160 5.20
2024-11-07 13D/A RNLXY / Renalytix Plc - Depositary Receipt (Common Stock) Jefferson River Capital Llc 19,644,391 5.90 130.21
2024-11-05 13D/A RNLXY / Renalytix Plc - Depositary Receipt (Common Stock) Icahn School Of Medicine At Mount Sinai 35,653,477 10.68 59.98
2024-11-05 13D/A FLGT / Fulgent Genetics, Inc. Hsieh Ming 8,730,670 28.50 0.54
2024-10-28 13D/A MDXH / MDxHealth SA MVM Partners, LLC 4,700,457 9.94
2024-10-02 13D/A RNLXY / Renalytix Plc - Depositary Receipt (Common Stock) Jefferson River Capital Llc 8,533,280 5.14 0.00
2024-08-20 13D/A PSNL / Personalis, Inc. Tempus Labs, Inc. 12,868,800 19.60 37.36
2024-07-03 13D PSNL / Personalis, Inc. Tempus Labs, Inc. 9,368,800 15.30 1.63
2024-06-28 13D/A PSNL / Personalis, Inc. Lightspeed Venture Partners Viii Lp 8,160,734 15.71 0.00
2024-05-28 13D/A FTRE / Fortrea Holdings Inc. Starboard Value LP 7,595,000 8.50 23.78
2024-05-23 13D/A BDSX / Biodesix, Inc. Schuler Jack W 31,146,692 21.40 0.35
2024-05-23 13D/A BDSX / Biodesix, Inc. Kennedy Lawrence T. Jr 25,622,151 17.60 20.56
2024-04-26 13D/A RNLXY / Renalytix Plc - Depositary Receipt (Common Stock) Icahn School Of Medicine At Mount Sinai 22,286,727 14.42 72.41
2024-04-09 13D/A BDSX / Biodesix, Inc. Patience John 7,659,411 6.70 1.63
2024-04-09 13D/A BDSX / Biodesix, Inc. Strobeck Matthew 5,672,000 4.98 11.84
2024-04-09 13D/A BDSX / Biodesix, Inc. Kennedy Lawrence T. Jr 21,253,376 18.70 1.02
2024-04-09 13D/A BDSX / Biodesix, Inc. Schuler Jack W 31,038,797 27.20 0.82
2024-04-03 13D/A AMS / American Shared Hospital Services Stachowiak Raymond C 1,389,737 21.90 6.76
2024-03-21 13D/A RNLXY / Renalytix Plc - Depositary Receipt (Common Stock) Jefferson River Capital Llc 8,533,280 7.10 0.00
2024-02-26 13D/A FTRE / Fortrea Holdings Inc. Starboard Value LP 6,136,000 6.90 -21.02
2024-01-17 13D BGLC / BioNexus Gene Lab Corp. Lai Soo Kow 1,250,001 7.03 0.00
2023-12-18 13D/A AMS / American Shared Hospital Services Ruffle John F 410,746 6.50 -25.41
2023-10-17 13D FTRE / Fortrea Holdings Inc. Starboard Value LP 7,769,195 8.70
2023-08-11 13D/A BDSX / Biodesix, Inc. Schuler Jack W 30,787,721 32.10 53.95
2023-08-07 13D/A BDSX / Biodesix, Inc. Patience John 7,536,698 7.90 5.36
2023-08-07 13D/A BDSX / Biodesix, Inc. Kennedy Lawrence T. Jr 21,039,200 22.00 41.72
2023-05-03 13D/A AMS / American Shared Hospital Services Stachowiak Raymond C 1,301,737 20.60 44.13