BlackRock, Inc.

Holdings History for PROTHENA CORP PUBLIC LTD CO - Ordinary Shares, par value $0.01 per share (PRTA)

Symbol: PRTA on Nasdaq
Investment type: Equity / Ordinary Shares, par value $0.01 per share
Latest Disclosed Shares Owned: 3,092,261 shares
Security Ownership %: 5.7%

Shares, Excluding Options vs Price

Value, Excluding Options

BlackRock, Inc. ownership in PROTHENA CORP PUBLIC LTD CO Ordinary Shares, par value $0.01 per share (PRTA)

17 Oct 2025 - BlackRock, Inc. has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 3,092,261 shares of PROTHENA CORP PUBLIC LTD CO Ordinary Shares, par value $0.01 per share (PRTA). This represents 5.7% ownership of the company. This is the first filing by BlackRock, Inc. disclosing ownership of PROTHENA CORP PUBLIC LTD CO Ordinary Shares, par value $0.01 per share (PRTA).

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
BlackRock, Inc.	5.7%		$30,180,467	3,092,261			$9.76	13G/A	30 Sep 2025	17 Oct 2025, 16:07

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025	0%	+0%	$39,226,235	4,107,459	+509,042	+14%	$9.55	Q4 2025
30 Sep 2025	0%	-0%	$35,120,550	3,598,417	-340,981	-8.7%	$9.76	Q3 2025
30 Jun 2025	0%	-0%	$23,912,147	3,939,398	-102,903	-2.5%	$6.07	Q2 2025
31 Mar 2025	0%	-0%	$50,023,480	4,042,301	-80,075	-1.9%	$12.38	Q1 2025
31 Dec 2024	0%	+0%	$57,094,906	4,122,376	+93,989	+2.3%	$13.85	Q4 2024
30 Sep 2024	0%	0%	$67,394,915	4,028,387	0		$16.73	Q3 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.