Insider Trading & Ownership of DAVID P. SOUTHWELL

Location: Lexington, MA
Summary: The estimated net worth of DAVID P. SOUTHWELL is at least $3,812,248 dollars as of 06 Jan 2026. DAVID P. SOUTHWELL is the Director of PTC THERAPEUTICS, INC. and owns shares of PTC THERAPEUTICS, INC. (PTCT) stock worth about $1.82M. DAVID P. SOUTHWELL is the Director of ROCKET PHARMACEUTICALS, INC. and owns shares of ROCKET PHARMACEUTICALS, INC. (RCKT) stock worth about $1.14M. DAVID P. SOUTHWELL is the Chief Executive Officer, Director of TScan Therapeutics, Inc. and owns shares of TScan Therapeutics, Inc. (TCRX) stock worth about $852.4K.
Signature: /s/ Avraham S. Adler, Attorney-in-Fact
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Ownership of DAVID P. SOUTHWELL

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
PTCT	PTC THERAPEUTICS, INC.	Director	$1,821,806	-$700,080	-28%	02 Jan 2026
RCKT, RCKTW	ROCKET PHARMACEUTICALS, INC.	Director	$1,138,001			18 Jun 2025
TCRX	TScan Therapeutics, Inc.	Chief Executive Officer, Director	$852,441			02 Feb 2023

Sym	Company	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

* An asterisk sign (*) next to the price indicates that the price is likely invalid.