InsidersTradesSigma
Total declarations
Companies
▲ Purchases (3 ops.)
▼ Sales (13 ops.)
Insider track record
OtherDisclosed buys
3
Disclosed sells
13
T+90 hit rate
0%
T+90 mean return
-4.0%
Across 1 buy signal with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Browse the full record of transactions filed by Epstein David R, Executive Partner, Flagship Pioneering. Director active across 7 companies, notably Axcella Health Inc.. Aggregated, 45 reports have been recorded. Split: 3 buys · 13 sells. Total volume traded: €2.4m. Activity tracked since 3 September 2021. The latest transaction was filed on 2 March 2026 (Cession). Regulator: SEC (Form 4). All data is free.
Companies and markets linked to Epstein David R
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations45 total
250 shares@ US$50.694.5% of flowClass A Common StockSEC:0001445826-26-000004:0
370 shares@ US$59.417.8% of flowClass A Common StockSEC:0001445826-26-000002:0
250 shares@ US$75.557.8% of flowClass A Comnmon StockSEC:0001445826-25-000006:0
370 shares@ US$90.0015.0% of flowClass A Common StockSEC:0001445826-25-000004:0
250 shares@ US$73.649.7% of flowClass A Comnmon StockSEC:0001415889-25-023653:0
370 shares@ US$55.1612.1% of flowClass A Comnmon StockSEC:0001415889-25-021029:0
250 shares@ US$55.209.3% of flowClass A Comnmon StockSEC:0001415889-25-015575:0
1,997 shares0Class A Comnmon StockSEC:0001415889-25-014307:0
370 shares@ US$53.5014.9% of flowClass A Common StockSEC:0001415889-25-011951:0
990 shares@ US$46.8336.2% of flowClass A Common StockSEC:0001415889-25-008656:0
250 shares@ US$57.5211.7% of flowClass A Common StockSEC:0001415889-25-006936:0
370 shares@ US$53.3116.3% of flowClass A Common StockSEC:0001415889-25-003151:0
620 shares@ US$41.8120.9% of flowClass A Common StockSEC:0001415889-24-029368:0
28,514 shares0Class A Common StockSEC:0001415889-24-017306:0
16,407 shares@ US$229.0061.9% of flowCommon StockSEC:0000950170-23-070873:0
10,620 shares@ US$213.0138.1% of flowCommon StockSEC:0001203311-23-000123:0
39,650 shares0Common StockSEC:0001203311-23-000085:0
107,389 shares0Common StockSEC:0000899243-22-035727:0
2,053 shares0Common StockSEC:0001694665-22-000110:0
112,519 shares0Common StockSEC:0000950103-22-010425:0
47,059 shares0Common StockSEC:0001104659-22-068109:0
2,052 shares0Common StockSEC:0001694665-22-000091:0
17,123 shares@ €1.3603100.0% of flowCommon StockSEC:0001694665-22-000083:0
Canonical exit: 25 Aug 2022 (T+90)
2,053 shares0Common StockSEC:0001694665-22-000073:0
30,000 shares@ US$1.4443100.0% of flowCommon StockSEC:0001179110-22-002716:0
Canonical exit: 20 Jul 2022 (T+90)
25 of 45 declarations
About Epstein David R
Epstein David R is Executive Partner, Flagship Pioneering. He has filed 45 filings in total. Across the 45 recent filings in the sample, buys amount to EUR 85571 and sells to EUR 5809994, with activity ranging from 2021-05-20 to 2026-03-04. The modal transaction nature is Levée d'options.
