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

Institutional Filer10%+ Owner · 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 31 transactions over the last 12 months across 2 companies totaling $113.1M.

Activity concentrated in LAB with 24 filings. The largest single transaction was a sale of BLFS for $23.8M on Jun 10, 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%-0.7%79%28
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

DATETICKERTYPESHARESPRICEVALUEROLE
May 21, 2026BLFSSell650,000$23.70$15.4M10%+ Owner
May 20, 2026BLFSSell250,000$23.70$5.9M10%+ Owner
May 19, 2026BLFSSell300,000$22.65$6.8M10%+ Owner
Dec 4, 2025LABBuy150,000$1.45$217KDirector
Dec 3, 2025LABBuy75,000$1.44$108KDirector
Dec 2, 2025LABBuy125,000$1.42$178KDirector
Nov 25, 2025LABBuy7,550,000$1.30$9.8MDirector
Nov 24, 2025LABBuy150,000$1.43$215KDirector
Nov 20, 2025LABBuy450,000$1.30$586KDirector
Nov 19, 2025LABBuy350,000$1.28$449KDirector
Nov 18, 2025LABBuy275,000$1.23$339KDirector
Nov 17, 2025LABBuy225,000$1.22$276KDirector
Nov 14, 2025LABBuy250,000$1.24$310KDirector
Nov 13, 2025LABBuy450,000$1.20$541KDirector
Nov 12, 2025LABBuy375,000$1.19$446KDirector
Nov 11, 2025LABBuy300,000$1.20$359KDirector
Nov 10, 2025LABBuy275,000$1.17$322KDirector
Nov 7, 2025LABBuy225,000$1.12$253KDirector
Oct 15, 2025BLFSSell750,000$28.55$21.4M10%+ Owner
Sep 9, 2025LABBuy100,000$1.29$129KDirector
Sep 4, 2025LABBuy250,000$1.28$319KDirector
Sep 3, 2025LABBuy250,000$1.27$316KDirector
Aug 26, 2025LABBuy125,000$1.26$158KDirector
Aug 25, 2025LABBuy200,000$1.24$248KDirector
Aug 22, 2025LABBuy200,000$1.26$253KDirector
Aug 15, 2025BLFSSell500,000$24.40$12.2M10%+ Owner
Aug 15, 2025LABBuy150,000$1.22$183KDirector
Aug 14, 2025LABBuy133,220$1.21$162KDirector
Aug 13, 2025LABBuy75,000$1.31$98KDirector
Aug 11, 2025BLFSSell500,000$22.60$11.3M10%+ Owner
Jun 10, 2025BLFSSell1,000,000$23.80$23.8M10%+ Owner

Top Companies Traded

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