Blackford Quentin S.
- SEC CIK
- 0001612451
In the past year, 4 open-market sale filings worth $11.2M and no purchases.
Current role at each company
- ALGN Align Technology IncDirectoras of Aug 31, 2026
- IRTC iRhythm Holdings, Inc.President and CEOas of Aug 11, 2026
- ATEC Alphatec Holdings, Inc.Directoras of Jun 12, 2026
- FNA Paragon 28, Inc.Directoras of Apr 21, 2025
- AXGN Axogen, Inc.Directoras of Apr 1, 2022
Show 1 more company
- DXCM Dexcom IncChief Operating Officeras of Sep 10, 2021
Open-market trades in the past year
Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.
- Bought
- –
- 0 filings
- Sold
- $11.2M
- 4 filings
- Net
- −$11.2M
- Bought minus sold
- Companies
- 1
- With open-market trades
Trades
Every Form 4 that lists Blackford Quentin S. as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.
IRTC iRhythm Holdings, Inc.
President and CEO12 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 11, 2026 (view filing)4:02 PM ET | Aug 10 | 1 day | Blackford Quentin S.President and CEO | SSale | −26.9K | $124.65 | −$3.35M | −10.6%226.0K after | |
| Mar 3, 2026 (view filing) | Mar 2 | 1 day | Blackford Quentin S.President and CEO | SSale | −13.8K | $128.44 | −$1.77M | −6.3%204.2K after | 3 lots |
| Feb 26, 2026 (view filing) | Feb 25 | 1 day | Blackford Quentin S.President and CEO | SSale | −25.5K | $135.42 | −$3.46M | −12.1%186.1K after | |
| Nov 4, 2025 (view filing) | Nov 3 | 1 day | Blackford Quentin S.President and CEO | SSale | −14.1K | $182.94 | −$2.57M | −7.9%165.0K after | |
| Aug 6, 2025 (view filing) | Aug 5 | 1 day | Blackford Quentin S.President and CEO | SSale | −30.0K | $160.54 | −$4.82M | −14.4%179.0K after | 7 lots10b5-1 |
| Mar 4, 2025 (view filing) | Mar 3 | 1 day | Blackford Quentin S.President and CEO | SSale | −8.14K | $108.77 | −$885.9K | −3.8%208.7K after | |
| Feb 27, 2025 (view filing) | Feb 26 | 1 day | Blackford Quentin S.President and CEO | SSale | −22.3K | $112.13 | −$2.50M | −9.3%216.9K after | |
| Nov 5, 2024 (view filing) | Nov 4 | 1 day | Blackford Quentin S.President and CEO | SSale | −16.1K | $77.41 | −$1.25M | −9.2%159.9K after | |
| Mar 5, 2024 (view filing) | Mar 4 | 1 day | Blackford Quentin S.President and CEO | SSale | −4.22K | $111.14 | −$469.1K | −2.3%175.8K after | |
| Mar 1, 2024 (view filing) | Feb 29 | 1 day | Blackford Quentin S.President and CEO | SSale | −24.7K | $121.96 | −$3.01M | −12.1%180.0K after |
ATEC Alphatec Holdings, Inc.
Director1 trade
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Mar 8, 2024 (view filing) | Mar 7 | 1 day | Blackford Quentin S.Director | PPurchase | +20.0K | $12.83 | +$256.6K | +3.6%572.6K after |
DXCM Dexcom Inc
Chief Operating Officer1 trade
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 10, 2021 (view filing) | Sep 8-10 | 2 days | Blackford Quentin S.Chief Operating Officer | SSale | −18.7K | $547.62 | −$10.2M | −49.2%19.3K after | 14 lots |