Casdin Partners Master Fund, L.P.
SEC insider (Form 3/4/5 filer). CIK 0001534265. 10% Owner at BIOLIFE SOLUTIONS INC (BLFS) and 1 other issuer. 36 reported Form 4/5 transactions since Sep 2024; latest on May 21, 2026. Located in NEW YORK, NY.
Companies Casdin Partners Master Fund, L.P. has filed insider reports for
- BIOLIFE SOLUTIONS INC (BLFS): 10% Owner
- STANDARD BIOTOOLS INC. (LAB): Director, 10% Owner
Casdin Partners Master Fund, L.P.
CIK: 0001534265
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (36 total)
- May 21, 2026BLFS
BIOLIFE SOLUTIONS INC
SaleIndirect650K shares at avg. $23.70$15.4M - May 20, 2026BLFS
BIOLIFE SOLUTIONS INC
SaleIndirect250K shares at avg. $23.70$5.9M - May 19, 2026BLFS
BIOLIFE SOLUTIONS INC
SaleIndirect300K shares at avg. $22.65$6.8M - Dec 4, 2025LAB
STANDARD BIOTOOLS INC.
PurchaseIndirect150K shares at avg. $1.45$217K - Dec 3, 2025LAB
STANDARD BIOTOOLS INC.
PurchaseIndirect75K shares at avg. $1.44$108K - Dec 2, 2025LAB
STANDARD BIOTOOLS INC.
PurchaseIndirect125K shares at avg. $1.42$178K - Nov 25, 2025LAB
STANDARD BIOTOOLS INC.
PurchaseIndirect7.6M shares at avg. $1.30$9.8M - Nov 24, 2025LAB
STANDARD BIOTOOLS INC.
PurchaseIndirect150K shares at avg. $1.43$215K - Nov 20, 2025LAB
STANDARD BIOTOOLS INC.
PurchaseIndirect450K shares at avg. $1.30$586K - Nov 19, 2025LAB
STANDARD BIOTOOLS INC.
PurchaseIndirect350K shares at avg. $1.28$449K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| May 21, 2026 |  BLFS BIOLIFE SOLUTIONS INC | Sale | 650,000 | $23.70 | $15,405,000 | Indirect |
| May 20, 2026 | BLFS BIOLIFE SOLUTIONS INC | Sale | 250,000 | $23.70 | $5,925,000 | Indirect |
| May 19, 2026 | BLFS BIOLIFE SOLUTIONS INC | Sale | 300,000 | $22.65 | $6,795,000 | Indirect |
| Dec 4, 2025 |  LAB STANDARD BIOTOOLS INC. | Purchase | 150,000 | $1.45 | $217,020 | Indirect |
| Dec 3, 2025 | LAB STANDARD BIOTOOLS INC. | Purchase | 75,000 | $1.44 | $108,037 | Indirect |
| Dec 2, 2025 | LAB STANDARD BIOTOOLS INC. | Purchase | 125,000 | $1.42 | $177,513 | Indirect |
| Nov 25, 2025 | LAB STANDARD BIOTOOLS INC. | Purchase | 7,550,000 | $1.30 | $9,838,405 | Indirect |
| Nov 24, 2025 | LAB STANDARD BIOTOOLS INC. | Purchase | 150,000 | $1.43 | $214,875 | Indirect |
| Nov 20, 2025 | LAB STANDARD BIOTOOLS INC. | Purchase | 450,000 | $1.30 | $586,260 | Indirect |
| Nov 19, 2025 | LAB STANDARD BIOTOOLS INC. | Purchase | 350,000 | $1.28 | $448,910 | Indirect |
1-10 of 36 transactions