Insider · CIK 0001612451
Quentin S. Blackford
Files at: ALGN, IRTC, ATEC, DXCM, NUVA. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 10, 2026 SForm 4 → | Aug 11, 4:02 pm EDT | iRhythm Holdings, Inc.IRTC | 26,859 | $124.65 | $3,348,012 | 226,008 | −10.6% | |
| Aug 7, 2026 AForm 4 → | Aug 11, 4:02 pm EDT | iRhythm Holdings, Inc.IRTC | 48,534 | — | — | 252,867 | — | |
| Jun 10, 2026 AForm 4 → | Jun 12, 5:34 pm EDT | Alphatec Holdings, Inc.ATEC | 32,012 | — | — | 600,381 | — | |
| Mar 12, 2019 SForm 4 → | Mar 13, 7:00 pm EDT | DEXCOM INCDXCM | 5,358 | $142.79 | $765,081 | 100,614 | −5.06% | plan? |
| Mar 8, 2019 AForm 4 → | Mar 11, 8:40 pm EDT | DEXCOM INCDXCM | 18,432 | $0.001 | $18 | 105,972 | — | plan? |
| Sep 11, 2018 SForm 4 → | Sep 13, 9:48 pm EDT | DEXCOM INCDXCM | 8,440 | $147.04 | $1,241,028 | 87,131 | −8.83% | plan? |
| Sep 10, 2018 SForm 4 → | Sep 12, 9:18 pm EDT | DEXCOM INCDXCM | 7,149 | $143.76 | $1,027,706 | 95,571 | −6.96% | plan? |
| Jul 30, 2018 AForm 4 → | Aug 1, 8:29 pm EDT | Alphatec Holdings, Inc.ATEC | 41,603 | — | — | 484,081 | — | plan? |
| Mar 8, 2018 AForm 4 → | Mar 12, 9:34 pm EDT | DEXCOM INCDXCM | 38,502 | $0.001 | $39 | 102,258 | — | plan? |
| Dec 28, 2017 AForm 4 → | Dec 29, 2:37 pm EST | Alphatec Holdings, Inc.ATEC | 442,478 | $2.26 | $1,000,000 | 442,478 | — | plan? |
| Sep 7, 2017 AForm 4 → | Sep 8, 7:47 pm EDT | DEXCOM INCDXCM | 62,358 | $0.001 | $62 | 63,756 | — | plan? |
| Feb 1, 2017 FMForm 4 → | Feb 3, 5:50 pm EST | NUVASIVE INCNUVA | 11,797 | $70.76 | $231,102 | 21,004 | — | plan? |
| Aug 3, 2016 FGMForm 4 → | Jan 4, 2017, 6:00 pm EST | NUVASIVE INCNUVA | 10,394 | $67.36 | $242,024 | 15,739 | — | plan? late |
| Jul 1, 2016 FMForm 4 → | Jul 5, 6:03 pm EDT | NUVASIVE INCNUVA | 4,755 | $59.97 | $97,751 | 14,285 | — | plan? |
| Feb 1, 2016 FMForm 4 → | Feb 3, 6:01 pm EST | NUVASIVE INCNUVA | 13,456 | $46.60 | $171,208 | 12,285 | — | plan? |
| Jan 1, 2016 AFForm 4 → | Jan 5, 8:03 pm EST | NUVASIVE INCNUVA | 8,270 | $54.11 | $126,942 | 6,177 | — | plan? |
| Dec 7, 2015 SForm 4 → | Dec 7, 8:39 pm EST | NUVASIVE INCNUVA | 15,000 | $51.10 | $766,500 | 2,599 | −85.2% | plan? |
| Oct 1, 2015 AFForm 4 → | Oct 5, 4:15 pm EDT | NUVASIVE INCNUVA | 7,965 | $48.88 | $144,929 | 17,599 | — | plan? |
| Jul 1, 2015 AFForm 4 → | Jul 6, 4:50 pm EDT | NUVASIVE INCNUVA | 4,388 | $47.52 | $60,018 | 15,564 | — | plan? |
| Jan 1, 2015 AFForm 4 → | Jan 5, 5:17 pm EST | NUVASIVE INCNUVA | 12,587 | $47.16 | $166,805 | 6,313 | — | plan? |
| Oct 3, 2014 SForm 4 → | Apr 8, 2015, 5:52 pm EDT | NUVASIVE INCNUVA | 5,000 | $36.30 | $181,513 | 12,902 | −27.9% | plan? late |
Reported trades — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 27, 2026 AForm 4 → | Aug 31, 4:49 pm EDT | ALIGN TECHNOLOGY INCALGN | 1,376 | — | — | 1,376 | — | |
| Feb 8, 2017 AForm 4 → | Feb 10, 5:44 pm EST | NUVASIVE INCNUVA | 13,203 | — | — | 13,203 | — | |
| Feb 1, 2017 MForm 4 → | Feb 3, 5:50 pm EST | NUVASIVE INCNUVA | 8,531 | — | — | 6,384 | — | |
| Jan 1, 2017 MForm 4 → | Jan 4, 6:00 pm EST | NUVASIVE INCNUVA | 5,924 | — | — | 5,924 | — | |
| Jul 1, 2016 MForm 4 → | Jul 5, 6:03 pm EDT | NUVASIVE INCNUVA | 3,125 | — | — | 0 | — | |
| Jan 26, 2016 MForm 4 → | Feb 3, 6:01 pm EST | NUVASIVE INCNUVA | 9,782 | — | — | 9,576 | — | late |
| Jan 26, 2016 AForm 4 → | Jan 28, 6:09 pm EST | NUVASIVE INCNUVA | 12,769 | — | — | 12,769 | — |