Casdin Partners Master Fund, L.P.

10% owner, BioLife Solutions; Director, 10% owner, GeneDx Holdings Corp.; Director, 10% owner, Standard Biotools Inc.

Bought, 12 months

$22.6M

Sold, 12 months

$28.1M

Companies

Latest trade

May 21, 2026

Companies

BioLife Solutions10% owner −$28.1M GeneDx Holdings Corp.Director, 10% owner +$21.5M Standard Biotools Inc.Director, 10% owner +$1.1M

Trades

BLFS Sold 650,000 shares at $23.70 $15.4M May 21

WGS Bought 140,000 shares at $43.81 $6.1M May 20

BLFS Sold 250,000 shares at $23.70 $5.9M May 20

WGS Bought 185,000 shares at $42.60 $7.9M May 19

BLFS Sold 300,000 shares at $22.65 $6.8M May 19

WGS Bought 175,000 shares at $42.55 $7.4M May 18

LAB Bought 225,000 shares at $1.22 $0.3M Nov 17

LAB Bought 250,000 shares at $1.24 $0.3M Nov 14

LAB Bought 450,000 shares at $1.20 $0.5M Nov 13

Open-market trades from SEC Form 4 only: no grants, option exercises or gifts. People are matched by the name on their filings, so two people with the same name share this page. For information only — not investment advice.