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
Walker Karin L	Chief Accounting O…	EXERCISE	$50K–$100K	5K	$15.04	Jun 20, 2023
Walker Karin L	Chief Accounting O…	SELL	$100K–$500K	5K	$68.90	Jun 20, 2023
Garren Hideki	Chief Medical Offi…	SELL	$500K+	7K	$74.00	Jun 16, 2023
Garren Hideki	Chief Medical Offi…	EXERCISE	$100K–$500K	7K	$24.90	Jun 16, 2023
Smith Brandon S.	COO	SELL	$100K–$500K	5K	$73.98	Jun 15, 2023
Smith Brandon S.	COO	EXERCISE	$50K–$100K	5K	$11.12	Jun 15, 2023
Garren Hideki	Chief Medical Offi…	EXERCISE	$100K–$500K	5K	$24.90	Jun 15, 2023
Garren Hideki	Chief Medical Offi…	SELL	$100K–$500K	5K	$74.22	Jun 15, 2023
Zago Wagner M.	Chief Scientific O…	SELL	$1M+	19K	$71.06	Jun 8, 2023
Zago Wagner M.	Chief Scientific O…	EXERCISE	$100K–$500K	19K	$26.09	Jun 8, 2023
Karp Carol D.	Chief Regulatory O…	SELL	$1M+	20K	$71.05	Jun 8, 2023
Karp Carol D.	Chief Regulatory O…	EXERCISE	$100K–$500K	20K	$13.19	Jun 8, 2023
Malecek Michael J	Chief Legal Officer	SELL	$100K–$500K	5K	$64.64	Jun 1, 2023
Malecek Michael J	Chief Legal Officer	EXERCISE	$50K–$100K	5K	$10.27	Jun 1, 2023
Walker Karin L	Chief Accounting O…	EXERCISE	$50K–$100K	5K	$15.04	May 20, 2023
Walker Karin L	Chief Accounting O…	SELL	$100K–$500K	5K	$74.00	May 20, 2023
Kinney Gene G.	President and CEO	SELL	$1M+	45K	$73.70	May 18, 2023
Kinney Gene G.	President and CEO	EXERCISE	$1M+	45K	$29.81	May 18, 2023
Nguyen Tran	Chief Strategy Off…	SELL	$1M+	95K	$73.99	May 18, 2023
Nguyen Tran	Chief Strategy Off…	EXERCISE	$1M+	95K	$26.15	May 18, 2023
Selkoe Dennis J.	Director	EXERCISE	$100K–$500K	15K	$18.07	May 6, 2023
Selkoe Dennis J.	Director	SELL	$500K+	15K	$57.00	May 6, 2023
Malecek Michael J	Chief Legal Officer	EXERCISE	$50K–$100K	5K	$10.27	Apr 29, 2023
Malecek Michael J	Chief Legal Officer	SELL	$100K–$500K	5K	$53.46	Apr 29, 2023
Walker Karin L	Chief Accounting O…	SELL	$100K–$500K	5K	$52.90	Apr 22, 2023
Walker Karin L	Chief Accounting O…	EXERCISE	$50K–$100K	5K	$15.04	Apr 22, 2023
Malecek Michael J	Chief Legal Officer	EXERCISE	$50K–$100K	5K	$10.27	Apr 1, 2023
Malecek Michael J	Chief Legal Officer	SELL	$100K–$500K	5K	$49.02	Apr 1, 2023
Walker Karin L	Chief Accounting O…	EXERCISE	$50K–$100K	5K	$15.04	Mar 23, 2023
Walker Karin L	Chief Accounting O…	SELL	$100K–$500K	5K	$47.72	Mar 23, 2023
Walker Karin L	Chief Accounting O…	SELL	$500K+	20K	$48.42	Mar 18, 2023
Walker Karin L	Chief Accounting O…	EXERCISE	$100K–$500K	20K	$15.04	Mar 18, 2023
Nguyen Tran	Chief Strategy Off…	SELL	$100K–$500K	10K	$48.43	Mar 18, 2023
Nguyen Tran	Chief Strategy Off…	EXERCISE	$50K–$100K	10K	$6.73	Mar 18, 2023
Malecek Michael J	Chief Legal Officer	EXERCISE	$100K–$500K	15K	$10.27	Mar 18, 2023
Malecek Michael J	Chief Legal Officer	SELL	$500K+	15K	$48.44	Mar 18, 2023
Garren Hideki	Chief Medical Offi…	SELL	$500K+	12K	$48.41	Mar 18, 2023
Garren Hideki	Chief Medical Offi…	EXERCISE	$100K–$500K	12K	$24.90	Mar 18, 2023
Nguyen Tran	Chief Strategy Off…	SELL	$500K+	10K	$53.34	Feb 18, 2023
Nguyen Tran	Chief Strategy Off…	EXERCISE	$50K–$100K	10K	$6.73	Feb 18, 2023
Nguyen Tran	Chief Strategy Off…	SELL	$500K+	10K	$55.53	Jan 21, 2023
Nguyen Tran	Chief Strategy Off…	EXERCISE	$50K–$100K	10K	$6.73	Jan 21, 2023
Cooke Shane	Director	EXERCISE	$15K–$50K	5K	$6.41	Jan 13, 2023
Cooke Shane	Director	SELL	$100K–$500K	5K	$52.92	Jan 13, 2023
Ekman Lars	Director	SELL	$500K+	16K	$55.98	Jan 6, 2023
Ekman Lars	Director	EXERCISE	$100K–$500K	16K	$6.41	Jan 6, 2023
COLLIER RICHARD T	Director	SELL	$100K–$500K	5K	$52.67	Jan 6, 2023
COLLIER RICHARD T	Director	EXERCISE	$15K–$50K	5K	$6.41	Jan 6, 2023
Nguyen Tran	Chief Strategy Off…	SELL	$500K+	10K	$58.97	Dec 24, 2022
Nguyen Tran	Chief Strategy Off…	EXERCISE	$50K–$100K	10K	$6.73	Dec 24, 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