William K. Heiden - Insider Trading & Ownership

Location
C/O Amag Pharmaceuticals, Inc., 1100 Winter Street, Waltham, MA
Summary
The estimated net worth of William K. Heiden is at least $501K dollars as of August 21, 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
All Insider Reports
All Insider Reports

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% Aug 19, 2025
ATRA Atara Biotherapeutics, Inc. Director $168K Jun 10, 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.