EcoR1 Capital, LLC

Holdings History for ADAPTIMMUNE THERAPEUTICS PLC - American Depositary Shares, each representing 6 Ordinary Shares (ADAPY)

Symbol: ADAPY
Investment type: Equity / American Depositary Shares, each representing 6 Ordinary Shares
Latest Disclosed Shares Owned: 66,000,000 shares
Security Ownership %: 4.2%

Shares, Excluding Options vs Price

Value, Excluding Options

EcoR1 Capital, LLC ownership in ADAPTIMMUNE THERAPEUTICS PLC American Depositary Shares, each representing 6 Ordinary Shares (ADAPY)

19 Aug 2025 - EcoR1 Capital, LLC has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 66,000,000 shares of ADAPTIMMUNE THERAPEUTICS PLC American Depositary Shares, each representing 6 Ordinary Shares (ADAPY). This represents 4.2% ownership of the company. This is the first filing by EcoR1 Capital, LLC disclosing ownership of ADAPTIMMUNE THERAPEUTICS PLC American Depositary Shares, each representing 6 Ordinary Shares (ADAPY).

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
EcoR1 Capital, LLC	4.2%		$6,600,000	66,000,000			$0.10	13G/A	15 Aug 2025	19 Aug 2025, 18:32

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
30 Sep 2025		-0.39%	$0	0	-27,404,070	-100%	$0.03	Q3 2025
30 Jun 2025	0.39%	0%	$6,568,756	27,404,070	0		$0.24	Q2 2025
31 Mar 2025	0.32%	0%	$5,398,602	27,404,070	0		$0.20	Q1 2025
31 Dec 2024	0.59%	0%	$14,762,573	27,404,070	0		$0.54	Q4 2024
30 Sep 2024	0.89%	0%	$26,044,828	27,404,070	0		$0.95	Q3 2024
30 Jun 2024	0.82%	0%	$26,716,228	27,404,070	0		$0.97	Q2 2024
31 Mar 2024	1.1%	+1.1%	$43,298,431	27,404,070	+27,404,070	NEW	$1.58	Q1 2024

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.