Quentin S. Blackford
President and CEO at iRhythm Holdings Inc.
Sits on 2 boards. Last updated September 28, 2026
Time on boards
- Boards served
- 2
- Current seats
- 2
- Board service
- 7 years
- Director since
- 2023
7 years of board service in total across 2 boards, counting each seat separately. Longest: iRhythm Holdings Inc., 3 years.
iRhythm Holdings Inc.
Director · President and CEO
Alphatec Holdings Inc.
Director
Chief executive roles
iRhythm Holdings Inc.
· President and CEO
Dates unknown
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Jun 11, 2025 | Alphatec Holdings Inc. | Grant or award | +15,131 | — | — |
| Mar 3, 2025 | iRhythm Holdings Inc. | Open-market sale | −8,145 | $108.77 | $885,932 |
| Feb 26, 2025 | iRhythm Holdings Inc. | Grant or award | +38,599 | — | — |
| Feb 26, 2025 | iRhythm Holdings Inc. | Open-market sale | −22,252 | $112.13 | $2,495,117 |
| Feb 25, 2025 | iRhythm Holdings Inc. | Grant or award | +40,610 | — | — |
| Nov 21, 2024 | Alphatec Holdings Inc. | Gift | −15,114 | — | — |
| Nov 4, 2024 | iRhythm Holdings Inc. | Open-market sale | −16,145 | $77.41 | $1,249,784 |
| Jun 12, 2024 | Alphatec Holdings Inc. | Grant or award | +16,747 | — | — |
| May 31, 2024 | iRhythm Holdings Inc. | Grant or award | +280 | $74.98 | $20,994 |
| Mar 7, 2024 | Alphatec Holdings Inc. | Open-market purchase | +20,000 | $12.83 | $256,600 |
| Mar 4, 2024 | iRhythm Holdings Inc. | Open-market sale | −4,221 | $111.14 | $469,122 |
| Feb 29, 2024 | iRhythm Holdings Inc. | Open-market sale | −24,701 | $121.96 | $3,012,534 |
| Feb 28, 2024 | iRhythm Holdings Inc. | Grant or award | +30,938 | — | — |
| Feb 27, 2024 | iRhythm Holdings Inc. | Grant or award | +45,268 | — | — |
| Jun 20, 2023 | Alphatec Holdings Inc. | Grant or award | +9,908 | — | — |
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