HEIDEN WILLIAM K

Director at rEVO Biologics, Inc. · on record since Oct 5, 2009
Chairman, President and CEO at rEVO Biologics, Inc. · on record since Jun 17, 2010
Director at AMAG PHARMACEUTICALS, INC. · on record since May 29, 2012
President and COO at PRAECIS PHARMACEUTICALS INC · on record since Jan 16, 2004
Director at MACROGENICS INC · on record since May 20, 2026
Director at Atara Biotherapeutics, Inc. · on record since Jun 11, 2026
President & CEO at AMAG PHARMACEUTICALS, INC. · on record since May 10, 2017

Insider trading activity of HEIDEN WILLIAM K

Transactions on record: 106; since Nov 14, 2003

Open-market buys: 6; $282.5K

Open-market sells: 12; $7.3M

Companies traded: 5; last filing Jun 11, 2026

Figures computed from official regulatory filings — .

Companies where HEIDEN WILLIAM K has traded

Atara Biotherapeutics, Inc.22 tx · $25K · Jun 11, 2026
MACROGENICS INC17 tx · $150.5K · May 20, 2026
AMAG PHARMACEUTICALS, INC.62 tx · $11.6M · Mar 4, 2020
rEVO Biologics, Inc.2 tx · Jun 17, 2010
PRAECIS PHARMACEUTICALS INC3 tx · $35.8K · Jan 16, 2004

Track record of HEIDEN WILLIAM K

Statistical track record

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Open-market buys: 6

Last buy: Aug 20, 2025

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Transaction history of HEIDEN WILLIAM K

Co-insiders of HEIDEN WILLIAM K

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Atara Biotherapeutics, Inc.Listing on record	Jun 11, 2026	Award	12,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 20, 2026	AwardD (derivative)	22,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 20, 2026	ExerciseD (derivative)	-3,750	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 20, 2026	AwardD (derivative)	3,750	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 20, 2026	Exercise	3,750	—	n/a (No price was disclosed in the filing)		SEC
MACROGENICS INCListing on record	Aug 21, 2025	Buy	50,500	1.52 USD	$76.8K	conv 68First in 12mo	SEC
MACROGENICS INCListing on record	Aug 21, 2025	Buy	49,500	1.49 USD	$73.8K	conv 53	SEC
Atara Biotherapeutics, Inc.Listing on record	Jun 12, 2025	Award	7,828	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 22, 2025	AwardD (derivative)	3,750	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 22, 2025	ExerciseD (derivative)	-6,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 22, 2025	Exercise	6,500	—	n/a (No price was disclosed in the filing)		SEC
MACROGENICS INCListing on record	May 22, 2025	AwardD (derivative)	22,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 23, 2024	AwardD (derivative)	6,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 23, 2024	AwardD (derivative)	16,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 22, 2024	ExerciseD (derivative)	-4,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 22, 2024	Exercise	4,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Apr 2, 2024	Award	150,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Nov 14, 2023	Buy	100,000	0.25 USD	$25K	conv 86First in 12mo	SEC
MACROGENICS INCListing on record	Jun 2, 2023	AwardD (derivative)	19,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	Jun 2, 2023	AwardD (derivative)	4,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Jun 2, 2023	Award	57,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Jun 2, 2023	AwardD (derivative)	79,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Jun 27, 2022	Award	20,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Jun 27, 2022	AwardD (derivative)	31,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 24, 2022	AwardD (derivative)	36,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Atara Biotherapeutics, Inc.Listing on record	Jun 11, 2026	Award	12,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 20, 2026	AwardD (derivative)	22,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 20, 2026	ExerciseD (derivative)	-3,750	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 20, 2026	AwardD (derivative)	3,750	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 20, 2026	Exercise	3,750	—	n/a (No price was disclosed in the filing)		SEC
MACROGENICS INCListing on record	Aug 21, 2025	Buy	50,500	1.52 USD	$76.8K	conv 68First in 12mo	SEC
MACROGENICS INCListing on record	Aug 21, 2025	Buy	49,500	1.49 USD	$73.8K	conv 53	SEC
Atara Biotherapeutics, Inc.Listing on record	Jun 12, 2025	Award	7,828	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 22, 2025	AwardD (derivative)	3,750	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 22, 2025	ExerciseD (derivative)	-6,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 22, 2025	Exercise	6,500	—	n/a (No price was disclosed in the filing)		SEC
MACROGENICS INCListing on record	May 22, 2025	AwardD (derivative)	22,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 23, 2024	AwardD (derivative)	6,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 23, 2024	AwardD (derivative)	16,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 22, 2024	ExerciseD (derivative)	-4,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 22, 2024	Exercise	4,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Apr 2, 2024	Award	150,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Nov 14, 2023	Buy	100,000	0.25 USD	$25K	conv 86First in 12mo	SEC
MACROGENICS INCListing on record	Jun 2, 2023	AwardD (derivative)	19,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	Jun 2, 2023	AwardD (derivative)	4,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Jun 2, 2023	Award	57,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Jun 2, 2023	AwardD (derivative)	79,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Jun 27, 2022	Award	20,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Atara Biotherapeutics, Inc.Listing on record	Jun 27, 2022	AwardD (derivative)	31,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MACROGENICS INCListing on record	May 24, 2022	AwardD (derivative)	36,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC