Quentin S. Blackford
President and CEO at iRhythm Holdings Inc.
Sits on 3 boards. Last updated September 28, 2026
Time on boards
- Boards served
- 3
- Current seats
- 3
- Board service
- 7 years
- Director since
- 2023
7 years of board service in total across 3 boards, counting each seat separately. Longest: iRhythm Holdings Inc., 3 years.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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Alphatec Holdings Inc. June 10, 202671.1%
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iRhythm Holdings Inc. May 27, 202699.8%
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Alphatec Holdings Inc. June 11, 202593.3%
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Alphatec Holdings Inc. June 12, 202475.2%
-
iRhythm Holdings Inc. May 29, 202497.3%
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Alphatec Holdings Inc. June 14, 202376.5%
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iRhythm Holdings Inc. May 24, 202396.3%
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 |
|---|---|---|---|---|---|
| Aug 10, 2026 | iRhythm Holdings Inc. | Open-market sale | −26,859 | $124.65 | $3,347,974 |
| Aug 7, 2026 | iRhythm Holdings Inc. | Grant or award | +48,534 | — | — |
| Jun 10, 2026 | Alphatec Holdings Inc. | Grant or award | +32,012 | — | — |
| May 29, 2026 | iRhythm Holdings Inc. | Grant or award | +178 | $96.82 | $17,234 |
| Mar 2, 2026 | iRhythm Holdings Inc. | Open-market sale | −4,347 | $128.44 | $558,329 |
| Mar 2, 2026 | iRhythm Holdings Inc. | Open-market sale | −4,043 | $128.44 | $519,283 |
| Mar 2, 2026 | iRhythm Holdings Inc. | Open-market sale | −5,423 | $128.44 | $696,530 |
| Feb 25, 2026 | iRhythm Holdings Inc. | Grant or award | +31,842 | — | — |
| Feb 25, 2026 | iRhythm Holdings Inc. | Open-market sale | −25,540 | $135.42 | $3,458,627 |
| Feb 24, 2026 | iRhythm Holdings Inc. | Grant or award | +46,687 | — | — |
| Nov 3, 2025 | iRhythm Holdings Inc. | Open-market sale | −14,059 | $182.94 | $2,571,953 |
| Aug 5, 2025 | iRhythm Holdings Inc. | Open-market sale | −8,726 | $158.85 | $1,386,125 |
| Aug 5, 2025 | iRhythm Holdings Inc. | Open-market sale | −9,775 | $160.06 | $1,564,587 |
| Aug 5, 2025 | iRhythm Holdings Inc. | Open-market sale | −4,905 | $160.73 | $788,381 |
| Aug 5, 2025 | iRhythm Holdings Inc. | Open-market sale | −1,600 | $161.92 | $259,072 |
Questions about Quentin S. Blackford
What boards is Quentin S. Blackford on?
Quentin S. Blackford sits on the boards of Align Technology Inc., Alphatec Holdings Inc. and iRhythm Holdings Inc.
What company is Quentin S. Blackford the CEO of?
Quentin S. Blackford is President and CEO of iRhythm Holdings Inc.
How long has Quentin S. Blackford served on boards?
Our records show at least 7 years of board service across 3 boards, the earliest from 2023.
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