Walker Karin L

VP, Finance & CAO at AFFYMAX INC · on record since Oct 3, 2012
Director at Vincerx Pharma, Inc. · on record since Mar 9, 2020
Director at Bio Green Med Solution, Inc. · on record since Nov 12, 2020
Chief Accounting Officer at PROTHENA CORP PUBLIC LTD CO · on record since May 22, 2013

Insider trading activity of Walker Karin L

Transactions on record: 179; since Oct 3, 2012

Open-market buys: 0

Open-market sells: 66; $10.1M

Companies traded: 3; last filing Jul 30, 2026

Figures computed from official regulatory filings — .

Companies where Walker Karin L has traded

PROTHENA CORP PUBLIC LTD CO169 tx · $13.2M · Jul 30, 2026
Bio Green Med Solution, Inc.9 tx · Jul 3, 2023
AFFYMAX INC1 tx · Oct 3, 2012

Track record of Walker Karin L

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Walker Karin L

Co-insiders of Walker Karin L

CREDIT SUISSE/AFFYMAX INC +1
EVNIN LUKEAFFYMAX INC +1
GADICKE ANSBERTAFFYMAX INC +1
GALAKATOS NICHOLASAFFYMAX INC +1
HENNER DENNISAFFYMAX INC +1
HENNEY CHRISTOPHER SBio Green Med Solution, Inc. +1
MPM BIOVENTURES II GMBH & CO PARALLEL BETEILIGUNGS KGAFFYMAX INC +1
MPM BIOVENTURES II LPAFFYMAX INC +1
MPM BIOVENTURES II QP LPAFFYMAX INC +1
SCHWARTZ BRIANBio Green Med Solution, Inc. +1
SPIEGELMAN DANIEL KAFFYMAX INC +1
STEINMETZ MICHAELAFFYMAX INC +1
WHEELER KURTAFFYMAX INC +1
ALTA CALIFORNIA MANAGEMENT PARTNERS LPBio Green Med Solution, Inc.
ALTA CALIFORNIA PARTNERS LPBio Green Med Solution, Inc.

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Src
PROTHENA CORP PUBLIC LTD COListing on record	Jul 30, 2026	Other	-15,000	8.56 USD	$128.4K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jul 30, 2026	ExerciseD (derivative)	-15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jul 30, 2026	Exercise	15,000	—	n/a (No price was disclosed in the filing)	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Mar 5, 2026	AwardD (derivative)	150,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jul 30, 2025	Award	25,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Mar 7, 2025	AwardD (derivative)	70,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Feb 29, 2024	AwardD (derivative)	54,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jan 24, 2024	Exercise	5,000	13.53 USD	$67.7K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jan 24, 2024	Sell	-5,000	34.00 USD	$170K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jan 24, 2024	ExerciseD (derivative)	-5,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Dec 20, 2023	Sell	-3,322	37.45 USD	$124.4K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Dec 20, 2023	ExerciseD (derivative)	-5,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Dec 20, 2023	Exercise	5,000	13.53 USD	$67.7K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Dec 20, 2023	Sell	-1,678	36.68 USD	$61.5K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Nov 30, 2023	Exercise	5,000	13.53 USD	$67.7K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Nov 30, 2023	Sell	-5,000	34.00 USD	$170K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Nov 30, 2023	ExerciseD (derivative)	-5,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Oct 25, 2023	Sell	-2,917	41.38 USD	$120.7K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Oct 25, 2023	Sell	-294	42.28 USD	$12.4K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Oct 25, 2023	ExerciseD (derivative)	-5,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Oct 25, 2023	Sell	-1,789	40.27 USD	$72K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Oct 25, 2023	Exercise	5,000	13.53 USD	$67.7K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Sep 19, 2023	Sell	-5,000	52.36 USD	$261.8K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Sep 19, 2023	ExerciseD (derivative)	-5,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Sep 19, 2023	Exercise	5,000	15.04 USD	$75.2K	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
PROTHENA CORP PUBLIC LTD COListing on record	Jul 30, 2026	Other	-15,000	8.56 USD	$128.4K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jul 30, 2026	ExerciseD (derivative)	-15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jul 30, 2026	Exercise	15,000	—	n/a (No price was disclosed in the filing)	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Mar 5, 2026	AwardD (derivative)	150,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jul 30, 2025	Award	25,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Mar 7, 2025	AwardD (derivative)	70,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Feb 29, 2024	AwardD (derivative)	54,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jan 24, 2024	Exercise	5,000	13.53 USD	$67.7K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jan 24, 2024	Sell	-5,000	34.00 USD	$170K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Jan 24, 2024	ExerciseD (derivative)	-5,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Dec 20, 2023	Sell	-3,322	37.45 USD	$124.4K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Dec 20, 2023	ExerciseD (derivative)	-5,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Dec 20, 2023	Exercise	5,000	13.53 USD	$67.7K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Dec 20, 2023	Sell	-1,678	36.68 USD	$61.5K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Nov 30, 2023	Exercise	5,000	13.53 USD	$67.7K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Nov 30, 2023	Sell	-5,000	34.00 USD	$170K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Nov 30, 2023	ExerciseD (derivative)	-5,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Oct 25, 2023	Sell	-2,917	41.38 USD	$120.7K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Oct 25, 2023	Sell	-294	42.28 USD	$12.4K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Oct 25, 2023	ExerciseD (derivative)	-5,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Oct 25, 2023	Sell	-1,789	40.27 USD	$72K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Oct 25, 2023	Exercise	5,000	13.53 USD	$67.7K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Sep 19, 2023	Sell	-5,000	52.36 USD	$261.8K	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Sep 19, 2023	ExerciseD (derivative)	-5,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PROTHENA CORP PUBLIC LTD COListing on record	Sep 19, 2023	Exercise	5,000	15.04 USD	$75.2K	SEC