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Insider Trading & Ownership of WILLIAM K. HEIDEN

Location
Waltham, MA
Summary
The estimated net worth of WILLIAM K. HEIDEN is at least $501K dollars as of 21 Aug 2025. WILLIAM K. HEIDEN is the Director of MACROGENICS INC and owns shares of MACROGENICS INC (MGNX) stock worth about $333K. WILLIAM K. HEIDEN is the Director of Atara Biotherapeutics, Inc. and owns shares of Atara Biotherapeutics, Inc. (ATRA) stock worth about $168K.
Signature
/s/ Beth A. Smith, Attorney-in-fact
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Ownership of WILLIAM K. HEIDEN

Symbol Company Relationship Holdings Value Past Year Net Change Change % Report Period
MGNX MACROGENICS INC Director $333K +$151K +82.5% 19 Aug 2025
ATRA Atara Biotherapeutics, Inc. Director $168K 10 Jun 2025

Insider Transactions Reported by WILLIAM K. HEIDEN:

Sym Company Class Transaction % Value $ * Price $ Shares Shares After Date Ownership
* An asterisk sign (*) next to the price indicates that the price is likely invalid.