As of April 22, 2026, Standard Biotools's top three insider holders are Partners Master Fund, L.P. Casdin (Director, 72.10Mn shares), Partners Master Fund, L.P. Casdin (Director, 62.05Mn shares), Partners Master Fund, L.P. Casdin (Director, 59.75Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Partners Master Fund, L.P. Casdin | - | 0 | 72,100,000 | 04 Dec, 2025 |
| Partners Master Fund, L.P. Casdin | - | 0 | 62,050,000 | 12 Nov, 2025 |
| Partners Master Fund, L.P. Casdin | - | 0 | 59,750,000 | 15 Aug, 2025 |
| Partners Master Fund, L.P. Casdin | - | 0 | 53,775,821 | 26 Aug, 2024 |
| Eli Casdin | - | 0 | 21,538,744 | 09 Jan, 2024 |
| Partners Lp Caligan | - | 0 | 8,467,920 | 03 Jul, 2023 |
| Partners Lp Caligan | - | 0 | 7,797,454 | 03 Jul, 2023 |
| Michael Egholm | President Ceo | 6,695,582 | 0 | 08 Apr, 2026 |
| Eli Casdin | - | 2,954,053 | 0 | 02 Mar, 2026 |
| Partners Master Fund, L.P. Casdin | - | 2,806,470 | 0 | 04 Mar, 2025 |
| Hanjoon Alex Kim | Chief Financial Officer | 2,779,401 | 0 | 08 Apr, 2026 |
| Partners Master Fund, L.P. Casdin | - | 0 | 1,200,000 | 19 May, 2023 |
| Partners Master Fund, L.P. Casdin | - | 0 | 1,200,000 | 19 May, 2023 |
| Eli Casdin | - | 0 | 1,200,000 | 19 May, 2023 |
| Sean Mackay | Svp Chief Business Officer | 1,032,281 | 0 | 08 Apr, 2026 |
| 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 |
| 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 |
| 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 |
| Colin Mccracken | Chief Commercial Officer | 65,103 | 0 | 24 Feb, 2022 |
| Colin Mccracken | Chief Commercial Officer | 65,103 | 0 | 24 Feb, 2022 |
| Bill Colston | - | 59,288 | 0 | 17 Jun, 2022 |
| 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 |
|---|---|---|---|---|---|---|---|---|
| 20 Mar, 2026 | Michael Egholm | Common Stock | A | 1,042,373 | $0.00 | 6,594,083 | D | A |
| 20 Mar, 2026 | Sean Mackay | Common Stock | A | 272,107 | $0.00 | 1,032,281 | D | A |
| 20 Mar, 2026 | Hanjoon Alex Kim | Common Stock | A | 323,173 | $0.00 | 2,730,519 | D | A |
| 06 Apr, 2026 | Hanjoon Alex Kim | Common Stock | A | 70,183 | $0.00 | 2,800,702 | D | M |
| 06 Apr, 2026 | Michael Egholm | Common Stock | A | 196,513 | $0.00 | 6,790,596 | D | M |
| 20 Mar, 2026 | Sean Mackay | Stock Option (Right to buy) | A | 612,240 | $0.00 | 612,240 | D | A |
| 06 Apr, 2026 | Michael Egholm | Common Stock | D | 95,014 | $0.91 | 6,695,582 | D | F |
| 06 Apr, 2026 | Hanjoon Alex Kim | Common Stock | D | 21,301 | $0.91 | 2,779,401 | D | F |
| 20 Mar, 2026 | Michael Egholm | Stock Option (Right to buy) | A | 2,345,340 | $0.00 | 2,345,340 | D | A |
| 20 Mar, 2026 | Hanjoon Alex Kim | Stock Option (Right to buy) | A | 727,140 | $0.00 | 727,140 | D | A |
| 06 Apr, 2026 | Michael Egholm | Restricted Stock Units | D | 196,513 | $0.00 | 0 | D | M |
| 06 Apr, 2026 | Hanjoon Alex Kim | Restricted Stock Units | D | 70,183 | $0.00 | 0 | D | M |
| 26 Feb, 2026 | Eli Casdin | Common Stock | A | 52,991 | $1.17 | 2,954,053 | D | A |
| 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 |
| 23 Feb, 2026 | Michael Egholm | Common Stock | D | 66,127 | $1.15 | 5,551,710 | D | F |
| 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 |
| 20 Nov, 2025 | Hanjoon Alex Kim | Common Stock | D | 12,739 | $1.28 | 2,415,086 | D | F |
| 20 Nov, 2025 | Michael Egholm | Common Stock | D | 63,529 | $1.28 | 5,617,837 | D | F |