InsidersTradesSigma
Total declarations
Companies
▲ Purchases (2 ops.)
▼ Sales (9 ops.)
Insider track record
ExecutiveDisclosed buys
2
Disclosed sells
9
T+90 hit rate
0%
T+90 mean return
-24.2%
Across 1 buy signal with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Browse the complete record of transactions filed by Blackford Quentin S., Chief Operating Officer. Officer active across 7 companies, notably DEXCOM INC. Aggregated, 43 disclosures have been published. Split: 2 buys · 9 sells. Total volume traded: €15m. History available since 28 May 2021. The latest transaction was filed on 7 August 2026 (Attribution). Regulator: SEC (Form 4). All data is free.
Companies and markets linked to Blackford Quentin S.
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations43 total
48,534 shares0Common StockSEC:0001612451-26-000012:0
26,859 shares@ US$124.6514Common StockSEC:0001612451-26-000012:1
32,012 sharesCommon StockSEC:0001612451-26-000010:0
178 shares@ US$96.8150.0004% mcap100.0% of flowCommon StockSEC:0001612451-26-000008:0
4,347 shares@ US$128.440997.0% of flowCommon StockSEC:0001612451-26-000006:0
31,842 shares0Common StockSEC:0001612451-26-000004:0
46,687 shares0Common StockSEC:0001612451-26-000002:0
14,059 shares@ US$182.936733.6% of flowCommon StockSEC:0001612451-25-000005:0
8,726 shares@ US$158.853727.1% of flowCommon StockSEC:0001388658-25-000204:0
15,131 shares0Common StockSEC:0001415889-25-017262:0
297 shares@ US$71.460.6% of flowCommon StockSEC:0001388658-25-000153:0
21,000 shares0Common StockSEC:0001415889-25-012154:0
50,554 sharesCommon StockSEC:0000950170-25-056364:0
8,145 shares@ US$108.7726.6% of flowCommon StockSEC:0001388658-25-000068:0
40,610 shares0Common StockSEC:0001388658-25-000042:0
15,114 shares0Common StockSEC:0001415889-24-028417:0
280 shares@ US$74.980.6% of flowCommon StockSEC:0001388658-24-000173:0
16,747 shares0Common StockSEC:0001415889-24-016926:0
15,906 shares0Common StockSEC:0001610717-24-000254:0
20,000 shares@ US$12.83100.0% of flowCommon StockSEC:0001415889-24-007462:0
Canonical exit: 5 Jun 2024 (T+90)
4,221 shares@ US$111.1413.5% of flowCommon StockSEC:0001388658-24-000059:0
30,938 shares0Common StockSEC:0001388658-24-000043:0
45,268 shares0Common StockSEC:0001388658-24-000025:0
9,755 shares@ US$102.2729.1% of flowCommon StockSEC:0001388658-23-000156:0
Canonical exit: 4 Sept 2023 (T+90)
9,908 shares0Common StockSEC:0001415889-23-010126:0
25 of 43 declarations
About Blackford Quentin S.
Blackford Quentin S. is Directeur des Opérations. He has 41 filings in total, and across the recent sample of 41 filings, buy amounts are EUR 1167970 and sell amounts are EUR 10969798, from 2016-01-05 to 2026-06-12. The recent filings concern notably iRhythm Technologies, Inc., with the modal transaction nature listed as Attribution.
