PRTA

PROTHENA CORP PUBLIC LTD CO

Pharmaceutical PreparationsNasdaqLarge accelerated filer

Total Trades

177

Buys

Sells

Largest Trade

$1M+

Insiders

Institutional Funds

137

Inst. Value

$1M+

Activist Filings

Insider Trades

Insider	Title	Type	Value	Shares	Price	Date
Cooke Shane	Director	SELL	$100K–$500K	5K	$61.04	Dec 13, 2022
Cooke Shane	Director	EXERCISE	$15K–$50K	5K	$6.41	Dec 13, 2022
COLLIER RICHARD T	Director	SELL	$100K–$500K	5K	$62.07	Dec 6, 2022
COLLIER RICHARD T	Director	EXERCISE	$15K–$50K	5K	$6.41	Dec 6, 2022
Malecek Michael J	Chief Legal Officer	EXERCISE	$50K–$100K	5K	$10.27	Dec 3, 2022
Malecek Michael J	Chief Legal Officer	SELL	$100K–$500K	5K	$62.28	Dec 3, 2022
Garren Hideki	Chief Medical Offi…	EXERCISE	$50K–$100K	4K	$24.90	Dec 3, 2022
Garren Hideki	Chief Medical Offi…	SELL	$100K–$500K	4K	$62.51	Dec 3, 2022
Ekman Lars	Director	SELL	$500K+	16K	$61.60	Dec 3, 2022
Ekman Lars	Director	EXERCISE	$100K–$500K	16K	$6.41	Dec 3, 2022
Nguyen Tran	Chief Strategy Off…	SELL	$500K+	10K	$61.09	Nov 26, 2022
Nguyen Tran	Chief Strategy Off…	EXERCISE	$50K–$100K	10K	$6.73	Nov 26, 2022
Walker Karin L	Chief Accounting O…	EXERCISE	$100K–$500K	10K	$15.04	Nov 19, 2022
Walker Karin L	Chief Accounting O…	SELL	$500K+	10K	$57.07	Nov 19, 2022
Cooke Shane	Director	SELL	$100K–$500K	5K	$56.17	Nov 11, 2022
Cooke Shane	Director	EXERCISE	$15K–$50K	5K	$6.41	Nov 11, 2022
COLLIER RICHARD T	Director	EXERCISE	$15K–$50K	5K	$6.41	Nov 10, 2022
COLLIER RICHARD T	Director	SELL	$100K–$500K	5K	$55.62	Nov 10, 2022
Ekman Lars	Director	SELL	$500K+	16K	$62.88	Nov 4, 2022
Ekman Lars	Director	EXERCISE	$100K–$500K	16K	$6.41	Nov 4, 2022
Garren Hideki	Chief Medical Offi…	EXERCISE	$50K–$100K	4K	$24.90	Nov 4, 2022
Garren Hideki	Chief Medical Offi…	SELL	$100K–$500K	4K	$61.89	Nov 4, 2022
Malecek Michael J	Chief Legal Officer	SELL	$1M+	85K	$60.71	Oct 29, 2022
Malecek Michael J	Chief Legal Officer	EXERCISE	$500K+	85K	$10.27	Oct 29, 2022
Walker Karin L	Chief Accounting O…	SELL	$1M+	20K	$57.23	Oct 27, 2022
Walker Karin L	Chief Accounting O…	EXERCISE	$100K–$500K	20K	$15.04	Oct 27, 2022
Nguyen Tran	Chief Strategy Off…	SELL	$500K+	10K	$56.44	Oct 22, 2022
Nguyen Tran	Chief Strategy Off…	EXERCISE	$50K–$100K	10K	$6.73	Oct 22, 2022
Cooke Shane	Director	EXERCISE	$15K–$50K	5K	$6.41	Oct 13, 2022
Cooke Shane	Director	SELL	$100K–$500K	5K	$55.91	Oct 13, 2022
COLLIER RICHARD T	Director	SELL	$100K–$500K	5K	$57.92	Oct 8, 2022
COLLIER RICHARD T	Director	EXERCISE	$15K–$50K	5K	$6.41	Oct 8, 2022
Garren Hideki	Chief Medical Offi…	EXERCISE	$50K–$100K	4K	$24.90	Oct 6, 2022
Garren Hideki	Chief Medical Offi…	SELL	$100K–$500K	4K	$60.90	Oct 6, 2022
Ekman Lars	Director	EXERCISE	$100K–$500K	16K	$6.41	Oct 6, 2022
Ekman Lars	Director	SELL	$500K+	16K	$61.52	Oct 6, 2022
Kinney Gene G.	President and CEO	SELL	$500K+	16K	$53.38	Oct 1, 2022
Kinney Gene G.	President and CEO	EXERCISE	$100K–$500K	16K	$6.41	Oct 1, 2022
Cooke Shane	Director	EXERCISE	$50K–$100K	10K	$6.41	Oct 1, 2022
Cooke Shane	Director	SELL	$100K–$500K	10K	$48.09	Oct 1, 2022
COLLIER RICHARD T	Director	EXERCISE	$100K–$500K	25K	$6.41	Oct 1, 2022
COLLIER RICHARD T	Director	SELL	$1M+	25K	$48.09	Oct 1, 2022
Ekman Lars	Director	SELL	$1M+	32K	$48.09	Oct 1, 2022
Ekman Lars	Director	EXERCISE	$100K–$500K	32K	$6.41	Oct 1, 2022
Kinney Gene G.	President and CEO	EXERCISE	$15K–$50K	3K	$6.41	Sep 24, 2022
Kinney Gene G.	President and CEO	SELL	$50K–$100K	3K	$32.02	Sep 24, 2022
Nguyen Tran	Chief Strategy Off…	EXERCISE	$50K–$100K	10K	$6.73	Sep 24, 2022
Nguyen Tran	Chief Strategy Off…	SELL	$100K–$500K	10K	$30.75	Sep 24, 2022
Garren Hideki	Chief Medical Offi…	SELL	$100K–$500K	4K	$30.00	Sep 17, 2022
Garren Hideki	Chief Medical Offi…	EXERCISE	$50K–$100K	4K	$24.90	Sep 17, 2022

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Institutional Ownership

13F filings as of Dec 31, 2025 · 137 funds holding

Fund	Shares	Value	Type
Rubric Capital Management LP	3.7M	$1M+	SH
STATE STREET CORP	2.3M	$1M+	SH
ADAR1 Capital Management, LLC	1.5M	$1M+	SH
ADAR1 Capital Management, LLC	1.5M	$1M+	SH
ACADIAN ASSET MANAGEMENT LLC	1.4M	$1M+	SH
Palo Alto Investors LP	1.3M	$1M+	SH
JACOBS LEVY EQUITY MANAGEMENT, INC	978K	$1M+	SH
GEODE CAPITAL MANAGEMENT, LLC	919K	$1M+	SH
Point72 Asset Management, L.P.	860K	$1M+	SH
DIMENSIONAL FUND ADVISORS LP	744K	$1M+	SH
Mariner, LLC	578K	$1M+	SH
Birchview Capital, LP	441K	$1M+	SH
RENAISSANCE TECHNOLOGIES LLC	436K	$1M+	SH
BNP PARIBAS FINANCIAL MARKETS	424K	$1M+	SH
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	357K	$1M+	SH
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	298K	$1M+	SH
Man Group plc	270K	$1M+	SH
JANE STREET GROUP, LLC	245K	$1M+	SH
VANGUARD GROUP INC	241K	$1M+	SH
Squarepoint Ops LLC	218K	$1M+	SH