Price T Rowe Associates Inc /Md/

13F 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 Ownership: 71K shares
Security Ownership: 0.1%

Shares, Excluding Options vs Price

Value, Excluding Options

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

2025-08-14 - T. Rowe Price Associates, Inc. has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 71K shares of PROTHENA CORP PUBLIC LTD CO Ordinary Shares, par value $0.01 per share (PRTA). This represents 0.1% percent ownership of the company.

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filed at
T. Rowe Price Associates, Inc.	0.1%		$585K	71K			$8.24	13G/A	6/30/2025	14 Aug 2025 13:07:20

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
9/30/2025	0%	+0%	$767K	78.5K	+7,500	+10.6%	$9.76	Q3 2025
6/30/2025	0%	0%	$432K	71K	-3,384,809	-97.9%	$6.08	Q2 2025
3/31/2025	0.01%	0%	$42.8M	3.46M	-229,852		$12.38	Q1 2025
12/31/2024	0.01%	0%	$51M	3.69M	-136,726	-3.58%	$13.85	Q4 2024
9/30/2024	0.01%	0%	$64M	3.82M	-414,970	-9.79%	$16.73	Q3 2024
6/30/2024	0.01%	+0%	$87.5M	4.24M	+35,633	+0.85%	$20.64	Q2 2024
3/31/2024	0.01%	0%	$104M	4.2M	-35,580	-0.84%	$24.77	Q1 2024
12/31/2023	0.02%	+0%	$154M	4.24M	+417,338	+10.9%	$36.34	Q4 2023
9/30/2023	0.03%	+0%	$184M	3.82M	+266,245	+7.49%	$48.25	Q3 2023
6/30/2023	0.03%	+0%	$243M	3.55M	+351,475	+11%	$68.28	Q2 2023
3/31/2023	0.02%	0%	$155M	3.2M	-3,610	-0.11%	$48.47	Q1 2023
12/31/2022	0.03%	+0%	$193M	3.21M	+223,962	+7.51%	$60.25	Q4 2022
9/30/2022	0.03%	-0.03%	$181M	2.98M	-2,983,847	-50%	$60.63	Q3 2022
6/30/2022	0.02%	0%	$162M	5.97M	-147,954	-2.42%	$27.15	Q2 2022
3/31/2022	0.02%	+0%	$224M	6.11M	+164,881	+2.77%	$36.57	Q1 2022
12/31/2021	0.03%	0%	$294M	5.95M	-113,768	-1.88%	$49.40	Q4 2021
9/30/2021	0.04%	+0%	$432M	6.06M	+239,544	+4.11%	$71.23	Q3 2021
6/30/2021	0.03%	+0.01%	$299M	5.82M	+2,510,739	+75.8%	$51.41	Q2 2021
3/31/2021	0.01%	+0.01%	$83.2M	3.31M	+3,297,931	+22878%	$25.12	Q1 2021
12/31/2020	0%		$173K	14.4K	-110	-0.76%	$12.00	Q4 2020
9/30/2020	0%	+0%	$145K	14.5K	+14,525	NEW	$9.98	Q3 2020
12/31/2018		0%	$0	0	-465,273	-100%		Q4 2018
9/30/2018	0%	0%	$6.09M	465K	-332,981	-41.7%	$13.08	Q3 2018
6/30/2018	0%	-0.01%	$11.6M	798K	-4,878,333	-85.9%	$14.58	Q2 2018
3/31/2018	0.03%	0%	$208M	5.68M	-427,172	-7%	$36.71	Q1 2018
12/31/2017	0.04%	+0%	$229M	6.1M	+654,868	+12%	$37.49	Q4 2017
9/30/2017	0.06%	+0.01%	$353M	5.45M	+1,026,626	+23.2%	$64.77	Q3 2017
6/30/2017	0.04%	0%	$239M	4.42M	-60,499	-1.35%	$54.12	Q2 2017
3/31/2017	0.05%	+0.01%	$250M	4.48M	+1,167,587	+35.2%	$55.79	Q1 2017
12/31/2016	0.03%	0%	$163M	3.32M	-45,373	-1.35%	$49.19	Q4 2016
9/30/2016	0.04%	+0%	$202M	3.36M	+22,167	+0.66%	$59.97	Q3 2016
6/30/2016	0.02%	+0%	$117M	3.34M	+10,400	+0.31%	$34.96	Q2 2016
3/31/2016	0.03%	+0%	$137M	3.33M	+227,300	+7.33%	$41.16	Q1 2016
12/31/2015	0.04%	+0%	$211M	3.1M	+1,580	+0.05%	$68.11	Q4 2015
9/30/2015	0.03%	0%	$141M	3.1M	-376,093	-10.8%	$45.34	Q3 2015
6/30/2015	0.04%	+0%	$183M	3.48M	+35,900	+1.04%	$52.67	Q2 2015
3/31/2015	0.03%	+0%	$131M	3.44M	+2,800	+0.08%	$38.14	Q1 2015
12/31/2014	0.02%	+0%	$71.3M	3.44M	+490,300	+16.6%	$20.76	Q4 2014
9/30/2014	0.01%	+0%	$65.3M	2.95M	+10,200	+0.35%	$22.16	Q3 2014
6/30/2014	0.01%	+0%	$66.2M	2.94M	+680,600	+30.2%	$22.55	Q2 2014
3/31/2014	0.02%	+0.01%	$86.4M	2.26M	+798,590	+54.8%	$38.31	Q1 2014
12/31/2013	0.01%		$38.6M	1.46M			$26.52	Q4 2013

* 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.