Insider Trading & Ownership of Errol B. Desouza

Location: Paramus, NJ
Summary: The estimated net worth of Errol B. Desouza is at least $5,025,168 dollars as of 12 Jun 2025. Errol B. Desouza is the Director of Royalty Pharma plc and owns shares of Royalty Pharma plc (RPRX) stock worth about $4.83M. Errol B. Desouza is the Director of Cyclerion Therapeutics, Inc. and owns shares of Cyclerion Therapeutics, Inc. (CYCN) stock worth about $101.8K. Errol B. Desouza is the Director of Alector, Inc. and owns shares of Alector, Inc. (ALEC) stock worth about $81.1K. Errol B. Desouza is the Director of CATALYST BIOSCIENCES, INC. and owns shares of GYRE THERAPEUTICS, INC. (GYRE) stock worth about $14K.
Signature: /s/ Marc Grasso, by power of attorney
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Ownership of Errol B. Desouza

Symbol	Company	Relationship	Holdings Value	Report Period
RPRX	Royalty Pharma plc	Director	$4,828,170	13 May 2025
CYCN	Cyclerion Therapeutics, Inc.	Director	$101,850	30 Nov 2023
ALEC	Alector, Inc.	Director	$81,142	11 Jun 2025
GYRE	CATALYST BIOSCIENCES, INC.	Director	$14,006	01 Oct 2021

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.