Blackford Quentin S.
SEC insider (Form 3/4/5 filer). CIK 0001612451. President and CEO at iRhythm Holdings, Inc. (IRTC) and 2 other issuers. 29 reported Form 4/5 transactions since Sep 2024; latest on Aug 10, 2026. Located in SAN FRANCISCO, CA.
Companies Blackford Quentin S. has filed insider reports for
- iRhythm Holdings, Inc. (IRTC): Director, Officer, President and CEO
- Alphatec Holdings, Inc. (ATEC): Director
- Paragon 28, Inc. (FNA): Director
Blackford Quentin S.
CIK: 0001612451
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (29 total)
- Aug 10, 2026IRTC
iRhythm Holdings, Inc.
SaleDirect26.9K shares at avg. $124.65$3.3M - Aug 7, 2026IRTC
iRhythm Holdings, Inc.
AwardDirect48.5K shares- - Jun 10, 2026ATEC
Alphatec Holdings, Inc.
AwardDirect32K shares- - May 29, 2026IRTC
iRhythm Holdings, Inc.
AwardDirect178 shares at avg. $96.81$17K - Mar 2, 2026IRTC
iRhythm Holdings, Inc.
SaleDirect5.4K shares at avg. $128.44$697K - Mar 2, 2026IRTC
iRhythm Holdings, Inc.
SaleDirect4.3K shares at avg. $128.44$558K - Mar 2, 2026IRTC
iRhythm Holdings, Inc.
SaleDirect4K shares at avg. $128.44$519K - Feb 25, 2026IRTC
iRhythm Holdings, Inc.
AwardDirect31.8K shares- - Feb 25, 2026IRTC
iRhythm Holdings, Inc.
SaleDirect25.5K shares at avg. $135.42$3.5M - Feb 24, 2026IRTC
iRhythm Holdings, Inc.
AwardDirect46.7K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 10, 2026 |  IRTC iRhythm Holdings, Inc. | Sale | 26,859 | $124.65 | $3,348,012 | Direct |
| Aug 7, 2026 | IRTC iRhythm Holdings, Inc. | Award | 48,534 | - | $0 | Direct |
| Jun 10, 2026 |  ATEC Alphatec Holdings, Inc. | Award | 32,012 | - | $0 | Direct |
| May 29, 2026 | IRTC iRhythm Holdings, Inc. | Award | 178 | $96.81 | $17,233 | Direct |
| Mar 2, 2026 | IRTC iRhythm Holdings, Inc. | Sale | 5,423 | $128.44 | $696,552 | Direct |
| Mar 2, 2026 | IRTC iRhythm Holdings, Inc. | Sale | 4,347 | $128.44 | $558,333 | Direct |
| Mar 2, 2026 | IRTC iRhythm Holdings, Inc. | Sale | 4,043 | $128.44 | $519,289 | Direct |
| Feb 25, 2026 | IRTC iRhythm Holdings, Inc. | Award | 31,842 | - | $0 | Direct |
| Feb 25, 2026 | IRTC iRhythm Holdings, Inc. | Sale | 25,540 | $135.42 | $3,458,599 | Direct |
| Feb 24, 2026 | IRTC iRhythm Holdings, Inc. | Award | 46,687 | - | $0 | Direct |
1-10 of 29 transactions