Casdin Partners Master Fund, L.P. has filed 68 insider transactions across 2 companies since January 2024.
Most recent transaction: a purchase of 150000 shares of STANDARD BIOTOOLS INC. ($LAB) on December 04, 2025.
Activity breakdown: 49 open-market purchases and 4 sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 4, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 150000 | $1.45 | 91,684,918.0000 | 402,195,000 | 0.16% | 0.04% |
| Dec. 2, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 125000 | $1.42 | 91,459,918.0000 | 402,195,000 | 0.14% | 0.03% |
| Dec. 3, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 75000 | $1.44 | 91,534,918.0000 | 402,195,000 | 0.08% | 0.02% |
| Nov. 24, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 150000 | $1.43 | 83,784,918.0000 | 402,195,000 | 0.18% | 0.04% |
| Nov. 25, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 7550000 | $1.30 | 91,334,918.0000 | 402,195,000 | 9.01% | 1.88% |
| Nov. 18, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 275000 | $1.23 | 82,834,918.0000 | 402,195,000 | 0.33% | 0.07% |
| Nov. 19, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 350000 | $1.28 | 83,184,918.0000 | 402,195,000 | 0.42% | 0.09% |
| Nov. 20, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 450000 | $1.30 | 83,634,918.0000 | 402,195,000 | 0.54% | 0.11% |
| Nov. 13, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 450000 | $1.20 | 82,084,918.0000 | 402,195,000 | 0.55% | 0.11% |
| Nov. 14, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 250000 | $1.24 | 82,334,918.0000 | 402,195,000 | 0.30% | 0.06% |
| Nov. 17, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 225000 | $1.22 | 82,559,918.0000 | 402,195,000 | 0.27% | 0.06% |
| Nov. 11, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 300000 | $1.20 | 81,259,918.0000 | 402,195,000 | 0.37% | 0.07% |
| Nov. 10, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 275000 | $1.17 | 80,959,918.0000 | 402,195,000 | 0.34% | 0.07% |
| Nov. 7, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 225000 | $1.12 | 80,684,918.0000 | 402,195,000 | 0.28% | 0.06% |
| Nov. 12, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 375000 | $1.19 | 81,634,918.0000 | 402,195,000 | 0.46% | 0.09% |
| Oct. 15, 2025 | BIOLIFE SOLUTIONS INC | $BLFS | Casdin Partners Master Fund, L.P. | TenPercentOwner | S | Common Stock, par value $0.001 per share | 750000 | $28.55 | 5,957,165.0000 | 48,723,535 | 11.18% | 1.54% |
| Sept. 9, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 100000 | $1.29 | 80,459,918.0000 | 400,273,000 | 0.12% | 0.02% |
| Sept. 3, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 250000 | $1.27 | 80,109,918.0000 | 400,273,000 | 0.31% | 0.06% |
| Sept. 4, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 250000 | $1.28 | 80,359,918.0000 | 400,273,000 | 0.31% | 0.06% |
| Aug. 26, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 125000 | $1.26 | 79,859,918.0000 | 400,273,000 | 0.16% | 0.03% |
| Aug. 25, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 200000 | $1.24 | 79,734,918.0000 | 400,273,000 | 0.25% | 0.05% |
| Aug. 22, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock, $0.001 par value per share | 200000 | $1.26 | 79,534,918.0000 | 400,273,000 | 0.25% | 0.05% |
| Aug. 15, 2025 | BIOLIFE SOLUTIONS INC | $BLFS | Casdin Partners Master Fund, L.P. | TenPercentOwner | S | Common Stock, par value $0.001 per share | 500000 | $24.40 | 6,707,165.0000 | 46,067,073 | 6.94% | 1.09% |
| Aug. 13, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 75000 | $1.31 | 79,051,698.0000 | 400,273,000 | 0.09% | 0.02% |
| Aug. 14, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 133220 | $1.21 | 79,184,918.0000 | 400,273,000 | 0.17% | 0.03% |
| Aug. 15, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 150000 | $1.22 | 79,334,918.0000 | 400,273,000 | 0.19% | 0.04% |
| Aug. 11, 2025 | BIOLIFE SOLUTIONS INC | $BLFS | Casdin Partners Master Fund, L.P. | TenPercentOwner | S | Common Stock, par value $0.001 per share | 500000 | $22.60 | 7,207,165.0000 | 46,067,073 | 6.49% | 1.09% |
| June 10, 2025 | BIOLIFE SOLUTIONS INC | $BLFS | Casdin Partners Master Fund, L.P. | TenPercentOwner | S | Common Stock, par value $0.001 per share | 1000000 | $23.80 | 7,707,165.0000 | 46,067,073 | 11.48% | 2.17% |
| April 7, 2025 | BIOLIFE SOLUTIONS INC | $BLFS | Casdin Partners Master Fund, L.P. | TenPercentOwner | J | Common Stock, par value $.001 per share | 27994 | $0.00 | 8,735,159.0000 | 46,067,073 | 0.32% | 0.06% |
| Feb. 28, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | A | Common Stock | 58215 | $1.07 | 19,490,326.0000 | 396,110,000 | 0.30% | 0.01% |
| Feb. 28, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | J | Common Stock | 545000 | $1.07 | 19,490,326.0000 | 396,110,000 | 2.72% | 0.14% |
| Feb. 28, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | J | Common Stock | 545000 | $1.07 | 78,882,106.0000 | 396,110,000 | 0.70% | 0.14% |
| Feb. 28, 2025 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 4820959 | $1.07 | 78,337,106.0000 | 396,110,000 | 6.56% | 1.22% |
| Aug. 27, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 250000 | $2.19 | 74,036,109.0000 | 389,703,000 | 0.34% | 0.06% |
| Aug. 22, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 307900 | $1.96 | 127,119,830.0000 | 389,703,000 | 0.24% | 0.08% |
| Aug. 23, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 292100 | $2.13 | 127,411,930.0000 | 389,703,000 | 0.23% | 0.07% |
| Aug. 26, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 150000 | $2.15 | 127,411,930.0000 | 389,703,000 | 0.12% | 0.04% |
| Aug. 20, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 500000 | $1.87 | 72,536,109.0000 | 389,703,000 | 0.69% | 0.13% |
| Aug. 19, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 250000 | $1.85 | 72,036,109.0000 | 389,703,000 | 0.35% | 0.06% |
| Aug. 21, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 500000 | $1.90 | 73,036,109.0000 | 389,703,000 | 0.69% | 0.13% |
| Aug. 14, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 1200000 | $1.59 | 71,786,109.0000 | 389,703,000 | 1.70% | 0.31% |
| Aug. 13, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 550000 | $1.62 | 70,586,109.0000 | 389,703,000 | 0.79% | 0.14% |
| Aug. 9, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 525408 | $1.61 | 69,536,109.0000 | 389,703,000 | 0.76% | 0.13% |
| Aug. 12, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 500000 | $1.64 | 70,036,109.0000 | 389,703,000 | 0.72% | 0.13% |
| Aug. 7, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 500000 | $1.57 | 68,441,109.0000 | 389,703,000 | 0.74% | 0.13% |
| Aug. 8, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 569562 | $1.64 | 69,010,701.0000 | 389,703,000 | 0.83% | 0.15% |
| Aug. 5, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 200000 | $1.58 | 67,941,109.0000 | 389,703,000 | 0.30% | 0.05% |
| Aug. 2, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 1000000 | $1.63 | 67,741,109.0000 | 389,703,000 | 1.50% | 0.26% |
| June 18, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | J | Common Stock | 545000 | $2.05 | 21,106,412.0000 | 387,652,000 | 2.65% | 0.14% |
| June 18, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | J | Common Stock | 655000 | $2.05 | 67,292,233.0000 | 387,652,000 | 0.98% | 0.17% |
| June 18, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | J | Common Stock | 1200000 | $2.05 | 20,561,412.0000 | 387,652,000 | 5.51% | 0.31% |
| May 23, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 100000 | $2.60 | 71,611,233.0000 | 387,652,000 | 0.14% | 0.03% |
| May 20, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 100000 | $2.58 | 71,011,233.0000 | 387,652,000 | 0.14% | 0.03% |
| May 22, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 150000 | $2.58 | 71,511,233.0000 | 387,652,000 | 0.21% | 0.04% |
| May 21, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 350000 | $2.56 | 71,361,233.0000 | 387,652,000 | 0.49% | 0.09% |
| May 16, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 500000 | $2.54 | 70,559,161.0000 | 387,652,000 | 0.71% | 0.13% |
| May 17, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 352072 | $2.56 | 70,911,233.0000 | 387,652,000 | 0.50% | 0.09% |
| May 15, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 500000 | $2.57 | 70,059,161.0000 | 387,652,000 | 0.72% | 0.13% |
| April 30, 2024 | BIOLIFE SOLUTIONS INC | $BLFS | Casdin Partners Master Fund, L.P. | TenPercentOwner | J | Common Stock, par value $.001 per share | 150000 | $17.54 | 8,707,165.0000 | 43,719,185 | 1.69% | 0.34% |
| April 30, 2024 | BIOLIFE SOLUTIONS INC | $BLFS | Casdin Partners Master Fund, L.P. | TenPercentOwner | J | Common Stock, par value $.001 per share | 150000 | $17.54 | 8,707,165.0000 | 43,719,185 | 1.75% | 0.34% |
| March 18, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | D | Series B-1 Convertible Preferred Stock | 89446 | $2.75 | 0.0000 | 83,364,000 | 100.00% | 0.11% |
| March 18, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | A | Common Stock | 32525821 | $2.75 | 55,619,524.0000 | 83,364,000 | 140.84% | 39.02% |
| March 18, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | A | Common Stock | 13939637 | $2.75 | 25,535,412.0000 | 83,364,000 | 120.21% | 16.72% |
| March 18, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | D | Series B-1 Convertible Preferred Stock | 38334 | $2.75 | 0.0000 | 83,364,000 | 100.00% | 0.05% |
| March 5, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 1403 | $2.62 | 23,093,703.0000 | 83,364,000 | 0.01% | 0.00% |
| March 4, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | P | Common Stock | 250000 | $2.57 | 23,092,300.0000 | 83,364,000 | 1.09% | 0.30% |
| Jan. 5, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | A | Common Stock | 2744219 | $0.00 | 15,190,744.0000 | 83,364,000 | 22.05% | 3.29% |
| Jan. 5, 2024 | STANDARD BIOTOOLS INC. | $LAB | Casdin Partners Master Fund, L.P. | Director | A | Common Stock | 11246525 | $0.00 | 15,190,744.0000 | 83,364,000 | 285.14% | 13.49% |