Prothena Corporation plc

Last updated September 27, 2026

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Organization details

Legal name: Prothena Corporation plc
Former names: Neotope Corp Ltd
Ownership: Public
Status: Active
Sector (GICS): Health Care
SIC code: 2834 — Pharmaceutical Preparations
Jurisdiction of incorporation: Ireland
Headquarters city: Dublin 2
Headquarters country: United States
Fiscal year end: December
Ticker symbol: PRTA
Primary stock exchange: Nasdaq

Identifiers

SEC CIK: 0001559053

Board of directors

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Daniel G. Welch · Director
Since 2024
Dennis J. Selkoe · Director
Since 2023
Gene G. Kinney · Director · President and CEO
Since 2025
Helen Susan Kim · Director
Since 2023
Karl Anders Olof Harfstrand · Director
Since 2023
Lars Ekman · Director
Since 2023
Paula K. Cobb · Director
Since 2023
Richard T. Collier · Director
Since 2023
Shane Cooke · Director
Since 2023
William H. Dunn Jr. · Director
Since 2023

Chief executives

Gene G. Kinney · President and CEO

Dates unknown

Director election results

Annual meeting of May 14, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

Shane Cooke

65.6%
Dennis J. Selkoe

72.8%

Board connections

3 of this board's directors also sit on 5 other boards. 5 are in the same sector.

Shared director Other board Same sector

Aktis Oncology Inc. Same sector
via Helen Susan Kim
Alkermes plc Same sector
via Shane Cooke
Nuvation Bio Inc. Same sector
via Daniel G. Welch
Structure Therapeutics Inc. Same sector
via Daniel G. Welch
Ultragenyx Pharmaceutical Inc. Same sector
via Daniel G. Welch

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Bought, last 12 months: $12,349,447; 18 purchases by 1 insider
Sold, last 12 months: $135,927; 2 sales by 2 insiders

Date	Insider	Transaction	Shares	Price	Value
Nov 9, 2026	SCULLY WILLIAM P 10% owner	Open-market purchase	+140,000	$8.53	$1,194,158
Nov 6, 2026	SCULLY WILLIAM P 10% owner	Gift	−916,444	—	—
Oct 27, 2026	SCULLY WILLIAM P 10% owner	Gift	+566,444	—	—
Oct 23, 2026	SCULLY WILLIAM P 10% owner	Open-market purchase	+50,000	$8.07	$403,525
Oct 22, 2026	SCULLY WILLIAM P 10% owner	Open-market purchase	+100,000	$8.19	$818,520
Oct 8, 2026	SCULLY WILLIAM P 10% owner	Open-market purchase	+90,000	$8.57	$770,904
Oct 7, 2026	SCULLY WILLIAM P 10% owner	Open-market purchase	+125,000	$8.40	$1,050,150
Oct 2, 2026	SCULLY WILLIAM P 10% owner	Open-market purchase	+100,000	$8.57	$857,240
Sep 29, 2026	SCULLY WILLIAM P 10% owner	Open-market purchase	+162,000	$8.68	$1,406,160
Sep 28, 2026	SCULLY WILLIAM P 10% owner	Open-market purchase	+103,500	$8.60	$890,100
Sep 18, 2026	SCULLY WILLIAM P 10% owner	Open-market purchase	+100,000	$8.43	$843,000
Sep 2, 2026	SCULLY WILLIAM P 10% owner	Open-market purchase	+27,000	$9.47	$255,690
Aug 20, 2026	SCULLY WILLIAM P 10% owner	Open-market purchase	+50,000	$8.79	$439,500
Aug 18, 2026	SCULLY WILLIAM P 10% owner	Gift	−627,553	—	—
Aug 17, 2026	SCULLY WILLIAM P 10% owner	Gift	+336,000	—	—

Peers

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Questions about Prothena Corporation plc

Who is the CEO of Prothena Corporation plc?

Gene G. Kinney is Prothena Corporation plc's President and CEO.

How many directors are on Prothena Corporation plc's board?

Prothena Corporation plc's board has 10 directors: Daniel G. Welch, Dennis J. Selkoe, Gene G. Kinney, Helen Susan Kim, Karl Anders Olof Harfstrand, Lars Ekman, Paula K. Cobb, Richard T. Collier, Shane Cooke and William H. Dunn Jr.

Are Prothena Corporation plc insiders buying or selling shares?

Over the last 12 months, Prothena Corporation plc insiders bought $12.3 million of shares in 18 purchases and sold $135,927 of shares in 2 sales on the open market, as reported to the SEC on Forms 4 and 5.

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