Casdin Capital, Llc 2seventy Bio, Inc. (TSVT) insider trading activity

Casdin Capital, LLC is Director of 2seventy bio, Inc.. Currently has a direct ownership of 0 shares of TSVT, which is worth approximately $0. The most recent transaction as insider was on May 13, 2025, when has been sold 22,625 shares (Common Stock, par value $0.0001 per share) at a price of $5.0 per share, resulting in proceeds of $113,125. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 0

100.0% 3M change

100.0% 12M change

Total Value Held $0

Casdin Capital, LLC Transaction History

Date	Transaction	Value	Shares Traded	Shares Held	Form
May 13 2025	SELL Disposition due to a tender of shares in a change of control transaction	$113,125 $5.0 p/Share	22,625 Reduced 100.0%	0 Common Stock, par valu...
Jun 10 2024	BUY Grant, award, or other acquisition	-	6,025 Added 21.03%	22,625 Common Stock, par valu...

Also insider at

GBIO

Generation Bio Co. Healthcare

> 10% Shareholder

SMFR

Sema4 Holdings Corp. Healthcare

Director

FULC

Fulcrum Therapeutics, Inc. Healthcare

> 10% Shareholder

CNST

CONSTELLATION PHARMACEUTICALS INC Healthcare

> 10% Shareholder

CCL