InsidersTradesSigma
Total declarations
Companies
▲ Purchases (0 ops.)
▼ Sales (4 ops.)
Insider track record
Board DirectorDisclosed buys
0
Disclosed sells
4
T+90 hit rate
59%
T+90 mean return
+4.8%
Across 22 buy signals with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Explore the detailed record of transactions filed by Fust Matthew K, Director. Officer active across 5 companies, notably Atara Biotherapeutics, Inc.. In total, 35 reports have been published. Split: 0 buy · 4 sells. Total volume traded: €1.2m. Activity tracked since 8 June 2021. The latest transaction was filed on 26 September 2025 (Levée d'options). Regulator: SEC (Form 4). The full history is free.
Declarations35 total
5,925 sharesCommon StockSEC:0001628280-26-044717:0
12,000 sharesCommon StockSEC:0000905148-26-002920:0
10,000 shares@ US$1.911.6% of flowCommon StockSEC:0001658247-25-000010:0
16,000 shares@ US$44.7561.2% of flowCommon StockSEC:0001658247-25-000010:1
5,740 shares0Common StockSEC:0000950170-25-074664:0
3,783 shares@ US$8.32100.0% of flowCommon StockSEC:0001610717-24-000511:0
5,345 shares0Common StockSEC:0000950170-24-075489:0
20,100 shares0Common StockSEC:0001610717-24-000335:0
3,400 shares0Common StockSEC:0000950170-24-071924:0
150,000 shares0Common StockSEC:0000905148-24-001060:0
12,500 shares@ US$23.2426.6% of flowCommon StockSEC:0001209191-24-005060:0
2,550 shares@ US$50.8930.3% of flowCommon StockSEC:0000950170-24-029040:0
6,000 shares0Common StockSEC:0001209191-23-038819:0
3,860 shares0Common StockSEC:0001209191-23-035691:0
57,000 shares0Common StockSEC:0001140361-23-028152:0
5,700 shares@ US$1.450.8% of flowCommon StockSEC:0001209191-22-042245:0
3,300 shares0Common StockSEC:0001209191-22-039566:0
20,500 shares0Common StockSEC:0001140361-22-024164:0
7,500 shares@ US$40.370.011% mcap100.0% of flowCommon StockSEC:0001209191-22-016930:0
13,354 shares@ US$19.50100.0% of flowCommon StockSEC:0001567619-21-019403
13,354 shares@ US$19.500.27% mcap100.0% of flowCommon StockSEC:0001567619-21-019403:0
8,954 shares@ US$1.910.0003% mcap15.2% of flowCommon StockSEC:0001209191-21-062728:0
8,954 shares@ US$1.911.5% of flowCommon StockSEC:0001209191-21-062728
6,046 shares@ US$1.910.0002% mcap10.0% of flowCommon StockSEC:0001209191-21-055314:0
6,046 shares@ US$1.911.0% of flowCommon StockSEC:0001209191-21-055314
25 of 35 declarations
About Fust Matthew K
Matthew K Fust is an executive at Atara Biotherapeutics, Inc.
