Standard BioTools Inc. (LAB) has 20 known insider and institutional holders on record. The largest holder is Casdin Partners Master Fund, L.P. with 71,875,000 shares. Other notable holders include VIKING GLOBAL INVESTORS LP and JOHNSON DAVID EDWARD.
Over the last 12 months, insiders have made 59 transactions in LAB stock — 35 buys (valued at $17.35M) and 9 sells (valued at $57.51K). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
LAB Insider Ownership
Top Holder
Casdin Partners Master Fund, L.P.
71,875,000 shares
Buys (12 mo)
35
$17.35M value
Sells (12 mo)
9
$57.51K value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
71,875,000 |
2025-12-04 |
|
| 2 |
Viking Global Investors Lp |
10 Percent Owner |
19,354,860 |
2024-03-20 |
|
| 3 |
Johnson David Edward |
Director |
11,189,663 |
2022-08-05 |
|
| 4 |
Caligan Partners Lp |
10 Percent Owner |
8,467,920 |
2023-07-03 |
|
| 5 |
Levin Easterly Partners Llc |
10 Percent Owner |
6,909,871 |
2019-09-19 |
|
| 6 |
Egholm Michael |
President & CEO |
5,551,710 |
2026-02-24 |
|
| 7 |
Casdin Eli |
10 Percent Owner |
2,954,053 |
2026-03-02 |
|
| 8 |
Levin Capital Strategies, L.p. |
10 Percent Owner |
2,467,538 |
2019-04-02 |
|
| 9 |
Kim Hanjoon Alex |
Chief Financial Officer |
2,407,346 |
2026-02-24 |
|
| 10 |
Mackay Sean |
SVP & Chief Business Officer |
760,174 |
2026-02-24 |
|
| 11 |
Casdin Amplify Fund, Lp |
Director |
545,000 |
2024-06-26 |
|
| 12 |
Black Jeffrey G. |
SVP & Chief Financial Officer |
421,608 |
2024-09-05 |
|
| 13 |
Cox Troy |
Director |
376,586 |
2026-03-02 |
|
| 14 |
Carey Thomas D. |
Director |
245,340 |
2026-03-02 |
|
| 15 |
Jog Vikram |
Chief Financial Officer |
200,000 |
2023-01-20 |
|
| 16 |
Colella Samuel D |
Director |
151,109 |
2020-03-12 |
|
| 17 |
Casdin Private Growth Equity Fund Ii Gp, Llc |
Director |
127,780 |
2022-04-06 |
|
| 18 |
Eloi Fenel M |
Director |
125,660 |
2025-06-24 |
|
| 19 |
Witney Frank |
Director |
125,660 |
2025-06-24 |
|
| 20 |
Hibbs Kathy L |
Director |
125,660 |
2025-06-24 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-02-26 |
Cox Troy |
Director |
RSU Award |
57,264 |
$1.17 |
$67K |
| 2026-02-26 |
Carey Thomas D. |
Director |
RSU Award |
51,282 |
$1.17 |
$60K |
| 2026-02-26 |
Casdin Eli |
10 Percent Owner |
RSU Award |
52,991 |
$1.17 |
$62K |
| 2026-02-23 |
Kim Hanjoon Alex |
Chief Financial Officer |
Tax Withholding of RSU |
12,740 |
$1.15 |
$14.65K |
| 2026-02-23 |
Mackay Sean |
SVP & Chief Business Officer |
Tax Withholding of RSU |
19,661 |
$1.15 |
$22.61K |
| 2026-02-23 |
Egholm Michael |
President & CEO |
Tax Withholding of RSU |
66,127 |
$1.15 |
$76.05K |
| 2025-12-04 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
150,000 |
$1.45 |
$217.02K |
| 2025-12-03 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
75,000 |
$1.44 |
$108.04K |
| 2025-12-02 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
125,000 |
$1.42 |
$177.51K |
| 2025-11-25 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
7,550,000 |
$1.30 |
$9.84M |
| 2025-11-24 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
150,000 |
$1.43 |
$214.88K |
| 2025-11-20 |
Kim Hanjoon Alex |
Chief Financial Officer |
Tax Withholding of RSU |
12,739 |
$1.28 |
$16.31K |
| 2025-11-20 |
Mackay Sean |
SVP & Chief Business Officer |
Tax Withholding of RSU |
19,661 |
$1.28 |
$25.17K |
| 2025-11-20 |
Egholm Michael |
President & CEO |
Tax Withholding of RSU |
63,529 |
$1.28 |
$81.32K |
| 2025-11-20 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
450,000 |
$1.30 |
$586.26K |
| 2025-11-19 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
350,000 |
$1.28 |
$448.91K |
| 2025-11-18 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
275,000 |
$1.23 |
$339.41K |
| 2025-11-17 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
225,000 |
$1.22 |
$275.58K |
| 2025-11-14 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
250,000 |
$1.24 |
$309.8K |
| 2025-11-13 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
450,000 |
$1.20 |
$541.4K |
| 2025-11-12 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
375,000 |
$1.19 |
$445.84K |
| 2025-11-11 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
300,000 |
$1.20 |
$358.8K |
| 2025-11-10 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
275,000 |
$1.17 |
$321.92K |
| 2025-11-07 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
225,000 |
$1.12 |
$252.77K |
| 2025-09-09 |
Casdin Partners Master Fund, L.p. |
10 Percent Owner |
Informative Buy |
100,000 |
$1.29 |
$128.92K |
