Prothena Corporation plc PRTA

Set alert

8.21 USD -0.08 (-0.97%)

At closeNov 3, 2026, 6:17 PM EST

8.11 -0.10 -1.22%

After hours · Nov 3, 6:17 PM ET

8.15 Day range 8.47

7.73 52-week range 11.80

Held by insiders 13.46%

Held by institutions 96.97%

Float held by institutions 112.05%

Institutions 246

Top institutional holders
Holder	% held	Shares	Value	Reported
EcoR1 Capital, LLC	21.53%	11,584,280	177.59M	Sep 29, 2024
FMR, LLC	14.99%	8,066,983	123.67M	Sep 29, 2024
Wellington Management Group, LLP	7.77%	4,178,788	64.06M	Sep 29, 2024
Blackrock Inc.	7.49%	4,028,387	61.76M	Sep 29, 2024
Price (T.Rowe) Associates Inc	7.10%	3,822,434	58.60M	Sep 29, 2024
Palo Alto Investors Lp	3.23%	1,737,964	26.64M	Sep 29, 2024

Top mutual fund holders
Holder	% held	Shares	Value	Reported
Vanguard Specialized-Health Care Fund	5.59%	3,007,603	46.11M	Jul 30, 2024
Fidelity Growth Company Fund	4.38%	2,355,277	36.11M	Oct 30, 2024
Price (T.Rowe) New Horizons Fund	3.52%	1,891,627	29.00M	Sep 29, 2024
iShares Russell 2000 ETF	2.02%	1,086,121	16.65M	Oct 30, 2024
Fidelity Growth Company K6 Fund	1.52%	816,390	12.52M	Oct 30, 2024
Fidelity Series Growth Company Fund	1.41%	758,605	11.63M	Oct 30, 2024

PRTA insiders
Insider	Relation	Latest transaction	Date	Shares held
COOKE SHANE M	Director	Conversion of Exercise of derivative security	Jan 9, 2023	0
GARREN HIDEKI	Officer	Conversion of Exercise of derivative security	Sep 12, 2023	0
KARP CAROL D	Officer	Conversion of Exercise of derivative security	Oct 3, 2023	0
KINNEY GENE G PH.D.	Chief Executive Officer	Conversion of Exercise of derivative security	May 16, 2023	12,793
MALECEK MICHAEL J.	Officer	Conversion of Exercise of derivative security	Sep 26, 2023	0
NGUYEN TRAN BRYAN	Chief Financial Officer	Conversion of Exercise of derivative security	May 16, 2023	3,200

Held by funds