Casdin Partners Master Fund, L.P. Insider Trading Activity

Institutional Filer10%+ Owner ยท CIK 1534265

31

Total trades

$113.1M

Total volume

May 21, 2026

Last activity

LAB

STANDARD BIOTOOLS INC.

Casdin Partners Master Fund, L.P., an institutional filer, recorded 30 transactions over the last 12 months across 2 companies totaling $89.3M.

Activity concentrated in LAB with 24 filings. The largest single transaction was a sale of BLFS for $21.4M on Oct 15, 2025.

Performance Scorecard

Forward stock performance after each transaction by Casdin Partners Master Fund, L.P.. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.

PERIODAVG BUY RETURNAVG SELL AVOIDEDSUCCESS RATETRADES
30 days+12.5%-3.8%71%31
90 days-3.7%-3.3%39%28
120 days-10.4%-0.3%29%28

Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.

Price & Trades

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Recent Trades

DATETICKERTYPESHARESPRICEVALUEฮ” OWNEDROLEFILING
May 21, 2026
BLFSSell650,000$23.70$15.4Mโˆ’12.0%10%+ Owner
May 20, 2026
BLFSSell250,000$23.70$5.9Mโˆ’4.4%10%+ Owner
May 19, 2026
BLFSSell300,000$22.65$6.8Mโˆ’5.0%10%+ Owner
Dec 4, 2025
LABBuy150,000$1.45$217K+0.2%Director
Dec 3, 2025
LABBuy75,000$1.44$108K+0.1%Director
Dec 2, 2025
LABBuy125,000$1.42$178K+0.2%Director
Nov 25, 2025
LABBuy7,550,000$1.30$9.8M+11.8%Director
Nov 24, 2025
LABBuy150,000$1.43$215K+0.2%Director
Nov 20, 2025
LABBuy450,000$1.30$586K+0.7%Director
Nov 19, 2025
LABBuy350,000$1.28$449K+0.6%Director
Nov 18, 2025
LABBuy275,000$1.23$339K+0.4%Director
Nov 17, 2025
LABBuy225,000$1.22$276K+0.4%Director
Nov 14, 2025
LABBuy250,000$1.24$310K+0.4%Director
Nov 13, 2025
LABBuy450,000$1.20$541K+0.7%Director
Nov 12, 2025
LABBuy375,000$1.19$446K+0.6%Director
Nov 11, 2025
LABBuy300,000$1.20$359K+0.5%Director
Nov 10, 2025
LABBuy275,000$1.17$322K+0.5%Director
Nov 7, 2025
Filed 3d late
LABBuy225,000$1.12$253K+0.4%Director
Oct 15, 2025
BLFSSell750,000$28.55$21.4Mโˆ’11.2%10%+ Owner
Sep 9, 2025
LABBuy100,000$1.29$129K+0.2%Director
Sep 4, 2025
LABBuy250,000$1.28$319K+0.4%Director
Sep 3, 2025
LABBuy250,000$1.27$316K+0.4%Director
Aug 26, 2025
LABBuy125,000$1.26$158K+0.2%Director
Aug 25, 2025
LABBuy200,000$1.24$248K+0.3%Director
Aug 22, 2025
LABBuy200,000$1.26$253K+0.3%Director
Aug 15, 2025
Filed 4d late
BLFSSell500,000$24.40$12.2Mโˆ’6.9%10%+ Owner
Aug 15, 2025
LABBuy150,000$1.22$183K+0.3%Director
Aug 14, 2025
LABBuy133,220$1.21$162K+0.2%Director
Aug 13, 2025
LABBuy75,000$1.31$98K+0.1%Director
Aug 11, 2025
BLFSSell500,000$22.60$11.3Mโˆ’6.5%10%+ Owner
Jun 10, 2025
BLFSSell1,000,000$23.80$23.8Mโˆ’11.5%10%+ Owner

Top Companies Traded

TICKERCOMPANYTRADESTOTAL VOLUME
LABSTANDARD BIOTOOLS INC.24$16.3M
BLFSBIOLIFE SOLUTIONS INC7$96.8M