As of March 23, 2026, Standard Biotools's top three insider holders are Partners Master Fund, L.P. Casdin (Director, 72.10Mn shares), Partners Lp Caligan (TenPercentOwner, 7.80Mn shares), Michael Egholm (President Ceo, 5.55Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Partners Master Fund, L.P. Casdin | 0 | 72,100,000 | 04 Dec, 2025 | |
| Partners Lp Caligan | 0 | 7,797,454 | 03 Jul, 2023 | |
| Michael Egholm | President Ceo | 5,551,710 | 0 | 24 Feb, 2026 |
| Eli Casdin | 2,954,053 | 0 | 02 Mar, 2026 | |
| Partners Master Fund, L.P. Casdin | 2,806,470 | 0 | 04 Mar, 2025 | |
| Eli Casdin | 0 | 2,744,219 | 09 Jan, 2024 | |
| Hanjoon Alex Kim | Chief Financial Officer | 2,407,346 | 0 | 24 Feb, 2026 |
| Partners Master Fund, L.P. Casdin | 0 | 1,200,000 | 19 May, 2023 | |
| Sean Mackay | Svp Chief Business Officer | 760,174 | 0 | 24 Feb, 2026 |
| Jeffrey G. Black | Svp Chief Financial Officer | 421,608 | 0 | 05 Sep, 2024 |
| Jeffrey G. Black | Svp Chief Financial Officer | 421,608 | 0 | 05 Sep, 2024 |
| Troy Cox | 376,586 | 0 | 02 Mar, 2026 | |
| Stephen Christopher Linthwaite | President Ceo | 328,473 | 0 | 24 Feb, 2022 |
| Thomas D. Carey | 245,340 | 0 | 02 Mar, 2026 | |
| Fenel M Eloi | 236,183 | 0 | 24 Jun, 2025 | |
| Vikram Jog | Chief Financial Officer | 217,622 | 0 | 23 Feb, 2023 |
| Frank Witney | 210,862 | 0 | 24 Jun, 2025 | |
| Nicolas Barthelemy | 0 | 204,077 | 04 Apr, 2022 | |
| Kathy L Hibbs | 137,720 | 0 | 24 Jun, 2025 | |
| Carlos V Paya | 126,844 | 0 | 16 Jun, 2023 | |
| Bradley Allen Kreger | Svp, Global Operations | 119,157 | 0 | 23 May, 2022 |
| Laura Clague | 104,791 | 0 | 16 Jun, 2023 | |
| Martin D Madaus | 104,111 | 0 | 20 Oct, 2023 | |
| Nicholas Khadder | Svp, Gen. Counsel Secretary | 100,480 | 0 | 03 Jun, 2022 |
| Gerhard F Burbach | 96,827 | 0 | 17 Jun, 2022 | |
| Bradley Allen Kreger | Svp, Global Operations | 91,308 | 0 | 24 Feb, 2022 |
| Nicholas Khadder | Svp, Gen. Counsel Secretary | 82,391 | 0 | 24 Feb, 2022 |
| Carlos V Paya | 69,554 | 0 | 27 May, 2021 | |
| Colin Mccracken | Chief Commercial Officer | 65,103 | 0 | 24 Feb, 2022 |
| Bill Colston | 59,288 | 0 | 17 Jun, 2022 | |
| Ana K. Stankovic | 18,563 | 0 | 27 May, 2021 | |
| Jeremy Steven Davis | Svp Chief Commercial Officer | 14,657 | 0 | 23 Feb, 2023 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 26 Feb, 2026 | Troy Cox | Common Stock | A | 57,264 | $1.17 | 376,586 | D | A |
| 26 Feb, 2026 | Thomas D. Carey | Common Stock | A | 51,282 | $1.17 | 245,340 | D | A |
| 26 Feb, 2026 | Eli Casdin | Common Stock | A | 52,991 | $1.17 | 2,954,053 | D | A |
| 23 Feb, 2026 | Sean Mackay | Common Stock | D | 19,661 | $1.15 | 760,174 | D | F |
| 23 Feb, 2026 | Hanjoon Alex Kim | Common Stock | D | 12,740 | $1.15 | 2,407,346 | D | F |
| 23 Feb, 2026 | Michael Egholm | Common Stock | D | 66,127 | $1.15 | 5,551,710 | D | F |
| 02 Dec, 2025 | Partners Master Fund, L.P. Casdin | Common Stock, $0.001 par value per share | A | 125,000 | $1.42 | 71,875,000 | I | P |
| 03 Dec, 2025 | Partners Master Fund, L.P. Casdin | Common Stock, $0.001 par value per share | A | 75,000 | $1.44 | 71,950,000 | I | P |
| 04 Dec, 2025 | Partners Master Fund, L.P. Casdin | Common Stock, $0.001 par value per share | A | 150,000 | $1.45 | 72,100,000 | I | P |
| 24 Nov, 2025 | Partners Master Fund, L.P. Casdin | Common Stock, $0.001 par value per share | A | 150,000 | $1.43 | 64,200,000 | I | P |
| 25 Nov, 2025 | Partners Master Fund, L.P. Casdin | Common Stock, $0.001 par value per share | A | 7,550,000 | $1.30 | 71,750,000 | I | P |
| 20 Nov, 2025 | Michael Egholm | Common Stock | D | 63,529 | $1.28 | 5,617,837 | D | F |
| 20 Nov, 2025 | Hanjoon Alex Kim | Common Stock | D | 12,739 | $1.28 | 2,415,086 | D | F |
| 20 Nov, 2025 | Sean Mackay | Common Stock | D | 19,661 | $1.28 | 779,835 | D | F |
| 18 Nov, 2025 | Partners Master Fund, L.P. Casdin | Common Stock, $0.001 par value per share | A | 275,000 | $1.23 | 63,250,000 | I | P |
| 19 Nov, 2025 | Partners Master Fund, L.P. Casdin | Common Stock, $0.001 par value per share | A | 350,000 | $1.28 | 63,600,000 | I | P |
| 20 Nov, 2025 | Partners Master Fund, L.P. Casdin | Common Stock, $0.001 par value per share | A | 450,000 | $1.30 | 64,050,000 | I | P |
| 13 Nov, 2025 | Partners Master Fund, L.P. Casdin | Common Stock, $0.001 par value per share | A | 450,000 | $1.20 | 62,500,000 | I | P |
| 14 Nov, 2025 | Partners Master Fund, L.P. Casdin | Common Stock, $0.001 par value per share | A | 250,000 | $1.24 | 62,750,000 | I | P |
| 17 Nov, 2025 | Partners Master Fund, L.P. Casdin | Common Stock, $0.001 par value per share | A | 225,000 | $1.22 | 62,975,000 | I | P |