EcoR1 Capital, LLC

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: 0 shares
Security Ownership %: 0%

Shares, Excluding Options vs Price

Value, Excluding Options

EcoR1 Capital, LLC ownership in PROTHENA CORP PUBLIC LTD CO Ordinary Shares, par value $0.01 per share (PRTA)

29 May 2025 - EcoR1 Capital, LLC has filed an SCHEDULE 13D/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 0 shares of PROTHENA CORP PUBLIC LTD CO Ordinary Shares, par value $0.01 per share (PRTA). This represents 0% ownership of the company. In their previous filing dated 06 May 2025, EcoR1 Capital, LLC had reported owning 5,304,596 shares, indicating a decrease of +100%. .

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
EcoR1 Capital, LLC	0%	-99%	$0	0	-5,304,596	-100%	$7.59	13D/A	27 May 2025	29 May 2025, 21:08
EcoR1 Capital, LLC	9.9%	-53%	$51,401,535	5,304,596	-6,279,684	-54%	$9.69	13D/A	02 May 2025	06 May 2025, 19:08
EcoR1 Capital, LLC	22%		$112,251,673	11,584,280			$9.69	13D/A	31 Dec 2024	03 Jan 2025, 19:45

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
30 Jun 2025			-8.5%	$0	0	-11,584,280	-100%	$8.85	Q2 2025
31 Mar 2025		8.5%	0%	$143,355,465	11,584,280	0		$12.38	Q1 2025
31 Dec 2024		6.4%	0%	$160,442,278	11,584,280	0		$13.85	Q4 2024
30 Sep 2024		6.6%	0%	$193,805,004	11,584,280	0		$16.73	Q3 2024
30 Jun 2024		7.3%	0%	$239,099,539	11,584,280	0		$20.64	Q2 2024
31 Mar 2024		7.3%	0%	$286,942,616	11,584,280	0		$24.77	Q1 2024
31 Dec 2023		11%	0%	$420,972,735	11,584,280	0		$36.34	Q4 2023
30 Sep 2023		19%	0%	$558,941,510	11,584,280	0		$48.25	Q3 2023
30 Jun 2023		21%	0%	$790,974,638	11,584,280	0		$68.28	Q2 2023
31 Mar 2023		18%	0%	$561,490,052	11,584,280	0		$48.47	Q1 2023
31 Dec 2022		21%	0%	$697,952,870	11,584,280	0		$60.25	Q4 2022
30 Sep 2022		21%	0%	$702,355,000	11,584,280	0		$60.63	Q3 2022
30 Jun 2022		11%	0%	$314,513,000	11,584,280	0		$27.15	Q2 2022
31 Mar 2022		13%	+0.34%	$423,637,000	11,584,280	+300,000	+2.7%	$36.57	Q1 2022
31 Dec 2021		18%	0%	$557,443,000	11,284,280	0		$49.40	Q4 2021
30 Sep 2021		28%	0%	$803,779,000	11,284,280	0		$71.23	Q3 2021
30 Jun 2021		22%	+0.48%	$580,125,000	11,284,280	+250,000	+2.3%	$51.41	Q2 2021
30 Jun 2021	call		-100%	$0	0	-250,000	-100%	$8.85	Q2 2021
31 Mar 2021		12%	+1.8%	$277,181,000	11,034,280	+1,607,640	+17%	$25.12	Q1 2021
31 Mar 2021	call	100%	+100%	$6,280,000	250,000	+250,000	NEW	$25.12	Q1 2021
31 Dec 2020		6.3%	0%	$113,214,000	9,426,640	0		$12.01	Q4 2020
30 Sep 2020		6.8%	0%	$94,172,000	9,426,640	0		$9.99	Q3 2020
30 Jun 2020		7.4%	0%	$98,603,000	9,426,640	0		$10.46	Q2 2020
31 Mar 2020		11%	0%	$100,865,000	9,426,640	0		$10.70	Q1 2020
31 Dec 2019		14%	0%	$149,224,000	9,426,640	0		$15.83	Q4 2019
30 Sep 2019		9.9%	+9.1%	$73,905,000	9,426,640	+8,703,340	+1203%	$7.84	Q3 2019
30 Jun 2019		0.79%	-0%	$7,645,000	723,300	-3,219	-0.44%	$10.57	Q2 2019
31 Mar 2019		0.95%	-0.15%	$8,813,000	726,519	-111,700	-13%	$12.13	Q1 2019
31 Dec 2018		0.99%	+0.99%	$8,634,000	838,219	+838,219	NEW	$10.30	Q4 2018

* 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.