InsidersTradesSigma
Total declarations
Companies
▲ Purchases (2 ops.)
▼ Sales (0 ops.)
Insider track record
Board DirectorDisclosed buys
2
Disclosed sells
0
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Discover the complete record of transactions filed by Heiden William K, Director. Officer active across 3 companies, notably Atara Biotherapeutics, Inc.. Cumulatively, 10 reports have been logged. Split: 2 buys · 0 sell. Total volume traded: €90k. Activity tracked since 8 June 2021. The latest transaction was disclosed on 19 August 2025 (Acquisition). Regulator: SEC (Form 4). All data is openly available.
Companies and markets linked to Heiden William K
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations10 total
12,000 sharesCommon StockSEC:0000905148-26-002921:0
50,500 shares@ US$1.52100.0% of flowCommon StockSEC:0001214939-25-000004:0
Canonical exit: 17 Nov 2025 (T+90)
7,828 shares0Common StockSEC:0000905148-25-002137:0
6,500 sharesCommon StockSEC:0001125345-25-000082:0
4,500 shares0Common StockSEC:0001125345-24-000108:0
150,000 shares0Common StockSEC:0000905148-24-001059:0
100,000 shares@ US$0.2533100.0% of flowCommon StockSEC:0000905148-23-001450:0
Canonical exit: 8 Feb 2024 (T+90)
57,000 shares0Common StockSEC:0001140361-23-028149:0
20,500 shares0Common StockSEC:0001140361-22-024165:0
11,000 shares0Common StockSEC:0001140361-21-020444:0
10 of 10 declarations
About Heiden William K
HEIDEN WILLIAM K is Administrateur at Atara Biotherapeutics, Inc. and Macrogenics INC. He has 10 filings in total, and across the sampled recent filings, buys total 89676 EUR and sells total 0 EUR, with the dominant transaction nature listed as Attribution, over the period from 2021-06-09 to 2026-06-11.
