William K Heiden insider trades

Open-market stock purchases and sales by William K Heiden, Unknown at Atara Biotherapeutics, Inc, from SEC Form 4 filings since Jun 15, 2010.

Track record: 100% of 2 scored buys are up 5% or more since purchase, averaging +172%.

Recent trades

DateStockTradeValue
Jun 9, 2026ATRA Atara Biotherapeutics, IncBought (not open market)—
May 19, 2026MGNX Macrogenics IncBought (not open market)—
May 19, 2026MGNX Macrogenics IncBought (not open market)—
May 18, 2026MGNX Macrogenics IncBought (not open market)—

Companies traded

  • ATRA Atara Biotherapeutics, Inc: 1 buy, last Jun 9, 2026
  • MGNX Macrogenics Inc: 2 buys, last May 19, 2026
  • AMAG Amag Pharmaceuticals, Inc: 3 buys, 12 sales, last Mar 2, 2020
  • GTCB GTC Biotherapeutics Inc: other filings, last Jun 15, 2010

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