Skip to contentBlackford Quentin S. — DEXCOM INC insider: 178 transactions · InsiderLensBlackford Quentin S.
- Director at iRhythm Holdings, Inc. · on record since Jun 1, 2026
- President and CEO at iRhythm Holdings, Inc. · on record since Jun 1, 2026
- Director at Alphatec Holdings, Inc. · on record since Jun 12, 2026
- CFO at NUVASIVE INC · on record since Feb 10, 2017
- Chief Operating Officer at DEXCOM INC · on record since Mar 13, 2019
- Director at LECTEC CORP /MN/ · on record since May 17, 2019
- Director at Paragon 28, Inc. · on record since Aug 4, 2022
Insider trading activity of Blackford Quentin S.
- Transactions on record
- 178
- since Nov 20, 2014
- Open-market buys
- 8
- $1.7M
- Open-market sells
- 85
- $59.5M
- Companies traded
- 6
- last filing Jun 12, 2026
Figures computed from official regulatory filings — methodology.
Companies where Blackford Quentin S. has traded
Track record of Blackford Quentin S.
Statistical track record
Free- Open-market buys
- 8
- Last buy
- Mar 7, 2024
Win rates and median returns are available with a free account (5 insiders/month).
Create a free account→Transaction history of Blackford Quentin S.
Co-insiders of Blackford Quentin S.
This page republishes public regulatory disclosures. Concerned by this data? Exercise your right to object →
Rosenbaum Marc WadeiRhythm Holdings, Inc. +1
| Company | Filed | Type | Qty | Price | Value · USD | Src |
|---|
| Jun 12, 2026 | Award | 32,012 | 0.00 USD | $0 | SEC |
| Jun 1, 2026 | Award | 178 | 96.82 USD | $17.2K | SEC |
| Mar 3, 2026 | Sell | -4,347 | 128.44 USD | $558.3K | SEC |
| Mar 3, 2026 | Sell | -4,043 | 128.44 USD | $519.3K | SEC |
| Mar 3, 2026 | Sell | -5,423 | 128.44 USD | $696.5K | SEC |
| Feb 27, 2026 | Award | 31,842 | 0.00 USD | $0 | SEC |
| Feb 26, 2026 | Award | 46,687 | 0.00 USD | $0 | SEC |
| Feb 26, 2026 | Sell | -25,540 | 135.42 USD | $3.5M | SEC |
| Nov 4, 2025 | Sell | -14,059 | 182.94 USD | $2.6M | SEC |
| Aug 6, 2025 | Sell | -9,775 | 160.06 USD | $1.6M | SEC |
| Aug 6, 2025 | Sell | -4,905 | 160.73 USD | $788.4K | SEC |
| Aug 6, 2025 | Sell | -1,514 | 163.30 USD | $247.2K | SEC |
| Aug 6, 2025 | Sell | -306 | 165.00 USD | $50.5K | SEC |
| Aug 6, 2025 | Sell | -1,600 | 161.92 USD | $259.1K | SEC |
| Aug 6, 2025 | Sell | -3,174 | 163.93 USD | $520.3K | SEC |
| Aug 6, 2025 | Sell | -8,726 | 158.85 USD | $1.4M | SEC |
| Jun 13, 2025 | Award | 15,131 | 0.00 USD | $0 | SEC |
| Jun 3, 2025 | Award | 297 | 71.46 USD | $21.2K | SEC |
| May 6, 2025 | Gift | -21,000 | 0.00 USD | $0 | SEC |
| Apr 21, 2025 | Other | -50,554 | — | — | SEC |
| Mar 4, 2025 | Sell | -8,145 | 108.77 USD | $885.9K | SEC |
| Feb 27, 2025 | Sell | -22,252 | 112.13 USD | $2.5M | SEC |
| Feb 27, 2025 | Award | 38,599 | 0.00 USD | $0 | SEC |
| Feb 27, 2025 | Award | 40,610 | 0.00 USD | $0 | SEC |
| Dec 5, 2024 | Gift | -15,114 | 0.00 USD | $0 | SEC |