Casdin Partners Master Fund, L.P.

Insider

Director, 10% Owner

Trades at: BLFS· WGS· LAB· VERV· DBTX

30D 90D 1Y

Net shares · 365d

+850.0K

2.0M buy · 1.2M sell

Net value · 365d

-$4.8M

$23.4M in · $28.1M out

Sentiment · 365d

Net buying

45% buying · 55% selling

Open-market trades · 365d

2.0M buy · 1.2M sell

Trading track record · all companies

Running net of open-market buys − sells across every company. Tap the line or a marker for details. ▲ buy · ▼ sell.

Transactions · 365d

Open-market Buys Sells All types

Showing 5 transactions in the last year.

BLFS Sell·S
May 21, 26

TenPercentOwner

$28.1M · $23.44/sh

1.2M sh · 3 lots

Own -20%
WGS Buy·P
May 20, 26

Director,TenPercentOwner

$21.5M · $42.92/sh

500.0K sh · 3 lots

Own +17%
LAB Buy·P
Nov 17, 25

Director,TenPercentOwner

$1.1M · $1.22/sh

925.0K sh · 3 lots

Own +1%
LAB Buy·P
Sep 9, 25

Director,TenPercentOwner

$129.0K · $1.29/sh

100.0K sh

Own +0%
LAB Buy·P
Aug 26, 25

Director,TenPercentOwner

$657.5K · $1.25/sh

525.0K sh · 3 lots

Own +1%

Date▾	Ticker	Role	Type	Shares	Own Δ	Price	Value
May 21, 2026	BLFS	TenPercentOwner	Sell S	1.2M · 3 lots	-20%	$23.44 avg	$28.1M
May 20, 2026	WGS	Director,TenPercentOwner	Buy P	500.0K · 3 lots	+17%	$42.92 avg	$21.5M
Nov 17, 2025	LAB	Director,TenPercentOwner	Buy P	925.0K · 3 lots	+1%	$1.22 avg	$1.1M
Sep 9, 2025	LAB	Director,TenPercentOwner	Buy P	100.0K	+0%	$1.29	$129.0K
Aug 26, 2025	LAB	Director,TenPercentOwner	Buy P	525.0K · 3 lots	+1%	$1.25 avg	$657.5K

Buy Sell Non-market (grant · exercise · gift)

About Casdin Partners Master Fund, L.P.

This profile aggregates every SEC Form 4 insider transaction reported by Casdin Partners Master Fund, L.P. across all companies they trade. Open-market purchases (code P) and sales (code S) are the highest-signal, discretionary trades; grants (A), option exercises (M) and gifts (G) reflect compensation rather than conviction and carry no market price. Figures cover the selected period and update as new filings are ingested.