InsidersTradesSigma
Total declarations
Companies
▲ Purchases (2 ops.)
▼ Sales (7 ops.)
Insider track record
ExecutiveDisclosed buys
2
Disclosed sells
7
T+90 hit rate
41%
T+90 mean return
+2.1%
Across 17 buy signals 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, 39 disclosures have been published. Split: 2 buys · 7 sells. Total volume traded: €14m. History available since 28 May 2021. The latest transaction was filed on 29 May 2026 (Attribution). Regulator: SEC (Form 4). All data is free.
Declarations39 total
32,012 sharesCommon StockSEC:0001612451-26-000010:0
178 shares@ US$96.8150.0004% mcap100.0% of flowCommon StockSEC:0001612451-26-000008:0
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
Ideal exit: 2 Dec 2024 (T+270)
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
Ideal exit: 2 Mar 2024 (T+270)
9,908 shares0Common StockSEC:0001415889-23-010126:0
9,755 shares@ US$102.2729.1% of flowCommon StockSEC:0001388658-23-000089:0
8,361 shares0Common StockSEC:0001610717-23-000057:0
28,775 shares0Common StockSEC:0001388658-23-000018:0
284 shares@ US$118.171.1% of flowCommon StockSEC:0001388658-22-000156:0
16,287 shares@ US$18.42100.0% of flowCommon StockSEC:0001567619-22-014960:0
18,546 shares0Common StockSEC:0001179110-22-003362:0
3,036 shares0Common StockSEC:0000805928-22-000046:0
101,979 shares0Common StockSEC:0001388658-21-000141:0
101,979 shares0Common StockSEC:0001388658-21-000141
25 of 39 declarations
About Blackford Quentin S.
Quentin S. Blackford is the Chief Operating Officer and a Director at DEXCOM INC, Axogen, Inc., and Alphatec Holdings, Inc. In this role, he oversees daily operations and contributes to the overall strategy of the companies. DEXCOM INC is a leader in glucose monitoring technologies, while Axogen, Inc. and Alphatec Holdings, Inc. specialize in medical solutions. Quentin S. Blackford leverages his expertise to enhance operational efficiency and support growth.
