- Corporate Officers - B
- Blackford Quentin S.
Insider Trading History of Blackford Quentin S.
The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Blackford Quentin S. since 2015.
This trader's CIK number is 1612451.
At the time of last reporting, Blackford Quentin S. was the President and CEO of Irhythm Technologies, Inc.. (stock ticker symbol IRTC).
Also see all insider trading activities at Irhythm Technologies, Inc..
Note that in the past
Blackford Quentin S. also reported insider trading activities as an insider of the following companies:
Yearly summary of insider trading at Nuvasive Inc (NUVA) by Blackford Quentin S.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2017 | NUVA | 0 | $0 | 0 | $0 | 14,455 | $0 |
| 2016 | NUVA | 0 | $0 | 0 | $0 | 12,907 | $0 |
| 2015 | NUVA | 0 | $0 | 20,000 | $948,015 | 0 | $0 |
Yearly summary of insider trading at Axogen, Inc. (AXGN) by Blackford Quentin S.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2022 | AXGN | 0 | $0 | 0 | $0 | 3,036 | $0 |
| 2021 | AXGN | 0 | $0 | 0 | $0 | 6,173 | $0 |
| 2019 | AXGN | 15,535 | $217,658 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Dexcom Inc (DXCM) by Blackford Quentin S.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2021 | DXCM | 0 | $0 | 32,394 | $15,272,880 | 0 | $0 |
| 2020 | DXCM | 0 | $0 | 38,531 | $13,308,912 | 0 | $0 |
| 2019 | DXCM | 0 | $0 | 36,238 | $5,013,082 | 0 | $0 |
| 2018 | DXCM | 0 | $0 | 15,589 | $2,266,282 | 0 | $0 |
Yearly summary of insider trading at Alphatec Holdings, Inc. (ATEC) by Blackford Quentin S.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2024 | ATEC | 20,000 | $256,600 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Irhythm Technologies, Inc. (IRTC) by Blackford Quentin S.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | IRTC | 0 | $0 | 60,397 | $8,240,117 | 0 | $0 |
| 2024 | IRTC | 0 | $0 | 40,846 | $4,262,317 | 0 | $0 |
| 2022 | IRTC | 0 | $0 | 12,699 | $1,528,134 | 0 | $0 |
Insider trading activities at 5 companies by Blackford Quentin S.:
1. Nuvasive Inc (NUVA)
2. Axogen, Inc. (AXGN)
3. Dexcom Inc (DXCM)
4. Alphatec Holdings, Inc. (ATEC)
5. Irhythm Technologies, Inc. (IRTC)
Table 1. Insider trading of Nuvasive Inc (NUVA) by Blackford Quentin S.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2017-02-01 | NUVA | Option Ex | 8,531 | .00 | 0 |
| 2017-01-01 | NUVA | Option Ex | 5,924 | .00 | 0 |
| 2016-07-01 | NUVA | Option Ex | 3,125 | .00 | 0 |
| 2016-02-01 | NUVA | Option Ex | 9,782 | .00 | 0 |
| 2015-12-07 | NUVA | Sale | 15,000 | 51.10 | 766,500 |
| 2014-10-03 | NUVA | Sale | 5,000 | 36.30 | 181,515 |
Table 2. Insider trading of Axogen, Inc. (AXGN) by Blackford Quentin S.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2022-03-30 | AXGN | Option Ex | 3,036 | .00 | 0 |
| 2021-06-01 | AXGN | Option Ex | 6,173 | .00 | 0 |
| 2019-08-09 | AXGN | Buy | 1,365 | 13.09 | 17,861 |
| 2019-08-12 | AXGN | Buy | 14,170 | 14.10 | 199,797 |
Table 3. Insider trading of Dexcom Inc (DXCM) by Blackford Quentin S.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2021-09-10 | DXCM | Sale | 1,519 | 558.33 | 848,103 |
| 2021-09-09 | DXCM | Sale | 9,462 | 545.76 | 5,163,962 |
| 2021-09-08 | DXCM | Sale | 7,681 | 546.09 | 4,194,501 |
| 2021-05-28 | DXCM | Sale | 7,223 | 375.00 | 2,708,625 |
| 2021-03-10 | DXCM | Sale | 6,509 | 362.22 | 2,357,689 |
| 2020-09-09 | DXCM | Sale | 12,886 | 398.30 | 5,132,519 |
| 2020-09-10 | DXCM | Sale | 12,193 | 400.93 | 4,888,478 |
| 2020-03-11 | DXCM | Sale | 6,208 | 254.35 | 1,579,035 |
| 2020-03-12 | DXCM | Sale | 6,353 | 232.38 | 1,476,329 |
| 2020-03-09 | DXCM | Sale | 891 | 261.00 | 232,551 |
| 2019-09-10 | DXCM | Sale | 10,320 | 141.94 | 1,464,872 |
| 2019-09-09 | DXCM | Sale | 11,686 | 147.78 | 1,726,992 |
| 2019-05-29 | DXCM | Sale | 8,874 | 119.02 | 1,056,139 |
| 2019-03-12 | DXCM | Sale | 5,358 | 142.79 | 765,079 |
| 2018-09-11 | DXCM | Sale | 8,440 | 146.75 | 1,238,578 |
| 2018-09-10 | DXCM | Sale | 7,149 | 143.75 | 1,027,704 |
Table 4. Insider trading of Alphatec Holdings, Inc. (ATEC) by Blackford Quentin S.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2024-03-07 | ATEC | Buy | 20,000 | 12.83 | 256,600 |
Table 5. Insider trading of Irhythm Technologies, Inc. (IRTC) by Blackford Quentin S.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-08-05 | IRTC | Sale | 30,000 | 161.97 | 4,859,070 |
| 2025-03-03 | IRTC | Sale | 8,145 | 108.77 | 885,931 |
| 2025-02-26 | IRTC | Sale | 22,252 | 112.13 | 2,495,116 |
| 2024-11-04 | IRTC | Sale | 16,145 | 77.41 | 1,249,784 |
| 2024-02-29 | IRTC | Sale | 24,701 | 121.96 | 3,012,533 |
| 2022-11-02 | IRTC | Sale | 12,699 | 120.33 | 1,528,134 |
Insider trading activities including stock purchases, stock sales, and option exercises
listed in the above table cannot be completely guaranteed as to their accuracy.
For more information regarding the trades made by Blackford Quentin S.
(President and CEO of Irhythm Technologies, Inc. at the time of this reporting) see
the Securities and Exchange Commission (SEC) website.