EcoR1 Capital, LLC

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

Symbol: PRTA on Nasdaq
Investment type: Equity - Shares of Stock
Class: Ordinary Shares, $0.01 par value
Latest Disclosed Ownership: 11.6M shares
Security Ownership: 21.5%

Shares, Excluding Options vs Price

Value, Excluding Options

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

2025-01-03 - EcoR1 Capital, LLC has filed an SCHEDULE 13D/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 11.6M shares of PROTHENA CORP PUBLIC LTD CO Ordinary Shares, $0.01 par value (PRTA). This represents 21.5% percent ownership of the company.

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filed at
EcoR1 Capital, LLC	21.5%		$161M	11.6M			$13.86	13D/A	12/31/2024	3 Jan 2025 19:45:02

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
12/31/2024		6.43%		$160M	11.6M			$13.85	Q4 2024
9/30/2024		6.64%		$194M	11.6M			$16.73	Q3 2024
6/30/2024		7.32%		$239M	11.6M			$20.64	Q2 2024
3/31/2024		7.29%		$287M	11.6M			$24.77	Q1 2024
12/31/2023		10.9%		$421M	11.6M			$36.34	Q4 2023
9/30/2023		18.9%		$559M	11.6M			$48.25	Q3 2023
6/30/2023		19.4%		$791M	11.6M			$68.28	Q2 2023
3/31/2023		18.1%		$561M	11.6M			$48.47	Q1 2023
12/31/2022		21.2%		$698M	11.6M			$60.25	Q4 2022
9/30/2022		20.7%		$702M	11.6M			$60.63	Q3 2022
6/30/2022		10.9%		$315M	11.6M			$27.15	Q2 2022
3/31/2022		13.3%	+0.34%	$424M	11.6M	+300,000	+2.66%	$36.57	Q1 2022
12/31/2021		17.8%		$557M	11.3M			$49.40	Q4 2021
9/30/2021		28.3%		$804M	11.3M			$71.23	Q3 2021
6/30/2021		21.7%	+0.57%	$580M	11.3M	+250,000	+2.27%	$51.41	Q2 2021
6/30/2021	call			$0	0	-250,000	-100%		Q2 2021
3/31/2021		12.3%	+2.18%	$277M	11M	+1,607,640	+17.1%	$25.12	Q1 2021
3/31/2021	call	100%		$6.28M	250K	+250,000	NEW	$25.12	Q1 2021
12/31/2020		6.09%		$113M	9.43M			$12.01	Q4 2020
9/30/2020		6.71%		$94.2M	9.43M			$9.99	Q3 2020
6/30/2020		7.28%		$98.6M	9.43M			$10.46	Q2 2020
3/31/2020		10.5%		$101M	9.43M			$10.70	Q1 2020
12/31/2019		13.5%		$149M	9.43M			$15.83	Q4 2019
9/30/2019		9.33%	+8.62%	$73.9M	9.43M	+8,703,340	+1203%	$7.84	Q3 2019
6/30/2019		0.77%	0%	$7.65M	723K	-3,219	-0.44%	$10.57	Q2 2019
3/31/2019		0.81%	-0.12%	$8.81M	727K	-111,700	-13.3%	$12.13	Q1 2019
12/31/2018		0.86%	+0.86%	$8.63M	838K	+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.