William K. Heiden

Insider Reports History

Location
C/O Amag Pharmaceuticals, Inc., 1100 Winter Street, Waltham, MA
Signature
/s/ Beth A. Smith, Attorney-in-fact
All insider transactions
Transactions in reports broken out by “transaction date” reported in original SEC filing, see here for transactions aggregated across transaction date

Holdings reported by William K. Heiden:

Stock Role Class Num Shares Value Price $ Report Date Ownership
Atara Biotherapeutics, Inc. Director Common Stock 22.2K $168K $7.56 Jun 10, 2025 Direct
MACROGENICS INC Director Stock Option (right to buy) 22K $167K $10.15 May 21, 2025 Direct
MACROGENICS INC Director Common Stock 111K $165K $1.49 Aug 20, 2025 Direct
MACROGENICS INC Director Restricted Stock Unit 3.75K May 21, 2025 Direct

Insider Reports Filed by William K. Heiden

Symbol Company Period Transactions Value $ Form Type Date Filed Role
MGNX MACROGENICS INC Aug 19, 2025 2 $151K 4 Aug 21, 2025 Director
ATRA Atara Biotherapeutics, Inc. Jun 10, 2025 1 $0 4 Jun 12, 2025 Director
MGNX MACROGENICS INC May 20, 2025 4 $0 4 May 22, 2025 Director
MGNX MACROGENICS INC May 21, 2024 2 $0 4 May 23, 2024 Director
MGNX MACROGENICS INC May 20, 2024 2 $0 4 May 22, 2024 Director
ATRA Atara Biotherapeutics, Inc. Mar 31, 2024 1 $0 4 Apr 2, 2024 Director
ATRA Atara Biotherapeutics, Inc. Nov 10, 2023 1 $25.3K 4 Nov 14, 2023 Director
ATRA Atara Biotherapeutics, Inc. May 31, 2023 2 $0 4 Jun 2, 2023 Director
MGNX MACROGENICS INC May 31, 2023 2 $0 4 Jun 2, 2023 Director
ATRA Atara Biotherapeutics, Inc. Jun 23, 2022 2 $0 4 Jun 27, 2022 Director
MGNX MACROGENICS INC May 23, 2022 1 $0 4 May 24, 2022 Director
MGNX MACROGENICS INC May 23, 2022 0 $0 3 May 24, 2022 Director
ATRA Atara Biotherapeutics, Inc. Jun 8, 2021 2 $0 4 Jun 9, 2021 Director