Casdin Partners GP, LLC

Director at 2seventy bio, Inc. · on record since Mar 28, 2024
Director at GeneDx Holdings Corp. · on record since May 11, 2026
10% owner at GeneDx Holdings Corp. · on record since May 11, 2026
10% owner at BIOLIFE SOLUTIONS INC · on record since May 21, 2026
10% owner at CONSTAR INTERNATIONAL INC · on record since Jul 23, 2018
10% owner at Fulcrum Therapeutics, Inc. · on record since Jul 22, 2019
10% owner at MAXCYTE, INC. · on record since Jul 30, 2021
Director at Absci Corp · on record since Jul 28, 2021
10% owner at Absci Corp · on record since Jul 21, 2021
Director at LABRANCHE & CO INC · on record since Apr 6, 2022
10% owner at LABRANCHE & CO INC · on record since Apr 6, 2022

Insider trading activity of Casdin Partners GP, LLC

Transactions on record: 25; since May 18, 2020

Open-market buys: 16; $39.3M

Open-market sells: 1; $21.4M

Companies traded: 3; last filing Nov 26, 2025

Figures computed from official regulatory filings — .

Companies where Casdin Partners GP, LLC has traded

LABRANCHE & CO INC15 tx · $141.1M · Nov 26, 2025
BIOLIFE SOLUTIONS INC6 tx · $43.9M · Oct 17, 2025
2seventy bio, Inc.4 tx · $4.2M · Mar 25, 2024

Track record of Casdin Partners GP, LLC

Statistical track record

Free account

Open-market buys: 16

Last buy: Nov 25, 2025

Win rates, median returns and the proven-insider analysis come with a free account.

Transaction history of Casdin Partners GP, LLC

Co-insiders of Casdin Partners GP, LLC

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
LABRANCHE & CO INCListing unverified	Nov 26, 2025	Buy	150,000	1.43 USD	$214.5K	conv 33Cluster	SEC
LABRANCHE & CO INCListing unverified	Nov 26, 2025	Buy	7,550,000	1.30 USD	$9.8M	conv 48Cluster	SEC
LABRANCHE & CO INCListing unverified	Nov 12, 2025	Buy	275,000	1.17 USD	$321.8K	conv 33Cluster	SEC
LABRANCHE & CO INCListing unverified	Nov 12, 2025	Buy	225,000	1.12 USD	$252K	conv 39ClusterFirst in 12mo	SEC
LABRANCHE & CO INCListing unverified	Nov 12, 2025	Buy	300,000	1.20 USD	$360K	conv 33Cluster	SEC
LABRANCHE & CO INCListing unverified	Nov 12, 2025	Buy	375,000	1.19 USD	$446.3K	conv 33Cluster	SEC
BIOLIFE SOLUTIONS INCListing on record	Oct 17, 2025	Sell	-750,000	28.55 USD	$21.4M		SEC
BIOLIFE SOLUTIONS INCListing on record	Apr 9, 2025	Other	27,994	—	n/a (No price was disclosed in the filing)		SEC
LABRANCHE & CO INCListing unverified	May 22, 2024	Buy	150,000	2.58 USD	$387K	conv 33Cluster	SEC
LABRANCHE & CO INCListing unverified	May 22, 2024	Buy	350,000	2.56 USD	$896K	conv 33Cluster	SEC
LABRANCHE & CO INCListing unverified	May 22, 2024	Buy	100,000	2.58 USD	$258K	conv 35Cluster	SEC
2seventy bio, Inc.Listing unverified	Mar 25, 2024	Buy	330,000	5.07 USD	$1.7M	conv 31	SEC
2seventy bio, Inc.Listing unverified	Mar 25, 2024	SellD (derivative)	-63,151	4.72 USD	$298.1K		SEC
2seventy bio, Inc.Listing unverified	Mar 25, 2024	Buy	147,377	5.12 USD	$754.6K	conv 27	SEC
2seventy bio, Inc.Listing unverified	Mar 25, 2024	Buy	300,000	4.90 USD	$1.5M	conv 32	SEC
LABRANCHE & CO INCListing unverified	Mar 20, 2024	Award	13,939,637	2.75 USD	$38.3M		SEC
LABRANCHE & CO INCListing unverified	Mar 20, 2024	OtherD (derivative)	-38,334	2.75 USD	$105.4K		SEC
LABRANCHE & CO INCListing unverified	Mar 20, 2024	Award	32,525,821	2.75 USD	$89.4M		SEC
LABRANCHE & CO INCListing unverified	Mar 20, 2024	OtherD (derivative)	-89,446	2.75 USD	$246K		SEC
LABRANCHE & CO INCListing unverified	Jan 9, 2024	Award	11,246,525	—	n/a (No price was disclosed in the filing)		SEC
LABRANCHE & CO INCListing unverified	Jan 9, 2024	Award	2,744,219	—	n/a (No price was disclosed in the filing)		SEC
BIOLIFE SOLUTIONS INCListing on record	Aug 11, 2023	Buy	58,465	13.20 USD	$771.7K	conv 32	SEC
BIOLIFE SOLUTIONS INCListing on record	May 23, 2023	Buy	50,000	22.55 USD	$1.1M	conv 60First in 12mo	SEC
BIOLIFE SOLUTIONS INCListing on record	May 23, 2023	Buy	24,973	21.86 USD	$545.9K	conv 31	SEC
BIOLIFE SOLUTIONS INCListing on record	May 18, 2020	Buy	1,904,762	10.50 USD	$20M	conv 58First in 12mo	SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
LABRANCHE & CO INCListing unverified	Nov 26, 2025	Buy	150,000	1.43 USD	$214.5K	conv 33Cluster	SEC
LABRANCHE & CO INCListing unverified	Nov 26, 2025	Buy	7,550,000	1.30 USD	$9.8M	conv 48Cluster	SEC
LABRANCHE & CO INCListing unverified	Nov 12, 2025	Buy	275,000	1.17 USD	$321.8K	conv 33Cluster	SEC
LABRANCHE & CO INCListing unverified	Nov 12, 2025	Buy	225,000	1.12 USD	$252K	conv 39ClusterFirst in 12mo	SEC
LABRANCHE & CO INCListing unverified	Nov 12, 2025	Buy	300,000	1.20 USD	$360K	conv 33Cluster	SEC
LABRANCHE & CO INCListing unverified	Nov 12, 2025	Buy	375,000	1.19 USD	$446.3K	conv 33Cluster	SEC
BIOLIFE SOLUTIONS INCListing on record	Oct 17, 2025	Sell	-750,000	28.55 USD	$21.4M		SEC
BIOLIFE SOLUTIONS INCListing on record	Apr 9, 2025	Other	27,994	—	n/a (No price was disclosed in the filing)		SEC
LABRANCHE & CO INCListing unverified	May 22, 2024	Buy	150,000	2.58 USD	$387K	conv 33Cluster	SEC
LABRANCHE & CO INCListing unverified	May 22, 2024	Buy	350,000	2.56 USD	$896K	conv 33Cluster	SEC
LABRANCHE & CO INCListing unverified	May 22, 2024	Buy	100,000	2.58 USD	$258K	conv 35Cluster	SEC
2seventy bio, Inc.Listing unverified	Mar 25, 2024	Buy	330,000	5.07 USD	$1.7M	conv 31	SEC
2seventy bio, Inc.Listing unverified	Mar 25, 2024	SellD (derivative)	-63,151	4.72 USD	$298.1K		SEC
2seventy bio, Inc.Listing unverified	Mar 25, 2024	Buy	147,377	5.12 USD	$754.6K	conv 27	SEC
2seventy bio, Inc.Listing unverified	Mar 25, 2024	Buy	300,000	4.90 USD	$1.5M	conv 32	SEC
LABRANCHE & CO INCListing unverified	Mar 20, 2024	Award	13,939,637	2.75 USD	$38.3M		SEC
LABRANCHE & CO INCListing unverified	Mar 20, 2024	OtherD (derivative)	-38,334	2.75 USD	$105.4K		SEC
LABRANCHE & CO INCListing unverified	Mar 20, 2024	Award	32,525,821	2.75 USD	$89.4M		SEC
LABRANCHE & CO INCListing unverified	Mar 20, 2024	OtherD (derivative)	-89,446	2.75 USD	$246K		SEC
LABRANCHE & CO INCListing unverified	Jan 9, 2024	Award	11,246,525	—	n/a (No price was disclosed in the filing)		SEC
LABRANCHE & CO INCListing unverified	Jan 9, 2024	Award	2,744,219	—	n/a (No price was disclosed in the filing)		SEC
BIOLIFE SOLUTIONS INCListing on record	Aug 11, 2023	Buy	58,465	13.20 USD	$771.7K	conv 32	SEC
BIOLIFE SOLUTIONS INCListing on record	May 23, 2023	Buy	50,000	22.55 USD	$1.1M	conv 60First in 12mo	SEC
BIOLIFE SOLUTIONS INCListing on record	May 23, 2023	Buy	24,973	21.86 USD	$545.9K	conv 31	SEC
BIOLIFE SOLUTIONS INCListing on record	May 18, 2020	Buy	1,904,762	10.50 USD	$20M	conv 58First in 12mo	SEC