WILLIAM K. HEIDEN

Insider Reports History

Location
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:

Company Role Class Num Shares Value Price $ Report Date Ownership
Atara Biotherapeutics, Inc. Director Common Stock 22,188 $167,741 $7.56 10 Jun 2025 Direct
MACROGENICS INC Director Stock Option (right to buy) 22,000 $167,475 $10.15 21 May 2025 Direct
MACROGENICS INC Director Common Stock 111,000 $165,390 $1.49 20 Aug 2025 Direct
MACROGENICS INC Director Restricted Stock Unit 3,750 21 May 2025 Direct

Insider Reports Filed by WILLIAM K. HEIDEN

Symbol Company Period Transactions Value $ Form Type Role Filing Time
MGNX MACROGENICS INC 19 Aug 2025 2 +$150,515 4 Director 21 Aug 2025, 16:19
ATRA Atara Biotherapeutics, Inc. 10 Jun 2025 1 $0 4 Director 12 Jun 2025, 20:36
MGNX MACROGENICS INC 20 May 2025 4 $0 4 Director 22 May 2025, 16:02
MGNX MACROGENICS INC 21 May 2024 2 $0 4 Director 23 May 2024, 17:16
MGNX MACROGENICS INC 20 May 2024 2 $0 4 Director 22 May 2024, 16:34
ATRA Atara Biotherapeutics, Inc. 31 Mar 2024 1 $0 4 Director 02 Apr 2024, 18:12
ATRA Atara Biotherapeutics, Inc. 10 Nov 2023 1 +$25,330 4 Director 14 Nov 2023, 18:29
ATRA Atara Biotherapeutics, Inc. 31 May 2023 2 $0 4 Director 02 Jun 2023, 19:08
MGNX MACROGENICS INC 31 May 2023 2 $0 4 Director 02 Jun 2023, 16:53
ATRA Atara Biotherapeutics, Inc. 23 Jun 2022 2 $0 4 Director 27 Jun 2022, 16:48
MGNX MACROGENICS INC 23 May 2022 1 $0 4 Director 24 May 2022, 16:29
MGNX MACROGENICS INC 23 May 2022 0 $0 3 Director 24 May 2022, 16:29
ATRA Atara Biotherapeutics, Inc. 08 Jun 2021 2 $0 4 Director 09 Jun 2021, 19:14