🕵️ Irhythm Holdings, Inc. ($IRTC)
SEC insider & ownership activity, last 12 months · CIK 1388658 · every row links its SEC filing
Over the last 12 months insiders sold $29.6M against $57K of open-market buying. Quentin S. Blackford sold $11.2M (Nov–Aug). One red-flag 8-K in the window: Cyber incident (1.05), Jun 10, 2026.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $57K (1 lots) · 12 sellers, $29.6M (66 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Quentin S. Blackford | 0 | – | 6 | $11.2M | Aug 10, 2026 |
| Patterson Chad | 0 | – | 6 | $3.1M | Aug 10, 2026 |
| Murphy Patrick Michael | 0 | – | 6 | $3.0M | Aug 10, 2026 |
| Daniel Wilson | 0 | – | 7 | $2.9M | Sep 2, 2026 |
| Turakhia Minang | 0 | – | 6 | $2.6M | Aug 10, 2026 |
| Abhijit Y. Talwalkar | 1 | $57K | 15 | $2.3M | May 11, 2026 |
| Shrishrimal Sumi | 0 | – | 6 | $2.1M | Aug 10, 2026 |
| Mervin Smith | 0 | – | 6 | $1.2M | Aug 3, 2026 |
| Rosenbaum Marc Wade | 0 | – | 5 | $873K | Jun 2, 2026 |
| Rodda Julianne | 0 | – | 1 | $258K | Aug 3, 2026 |
| Lawrence Brian Lee | 0 | – | 1 | $122K | May 4, 2026 |
| Freeman Sean Clinton | 0 | – | 1 | $114K | Jul 2, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| RTW Investments, LP | 6.6% | 13G | Aug 14, 2026 | filing ↗ | |
| Roderick Wong | 6.6% | 13G | Aug 14, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 5.6% | 13G | Apr 28, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.2% | 13G | Apr 27, 2026 | filing ↗ | |
| Artisan Partners Asset Management Inc. | 5.1% | 13G | Aug 13, 2026 | filing ↗ | |
| Artisan Partners Holdings LP | 5.1% | 13G | Aug 13, 2026 | filing ↗ | |
| Artisan Investments GP LLC | 5.1% | 13G | Aug 13, 2026 | filing ↗ | |
| Artisan Partners Limited Partnership | 5.1% | 13G | Aug 13, 2026 | filing ↗ | |
| Millennium Management LLC | 5.1% | 13G | Mar 23, 2026 | filing ↗ | |
| Millennium Group Management LLC | 5.1% | 13G | Mar 23, 2026 | filing ↗ | |
| Israel A. Englander | 5.1% | 13G | Mar 23, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Abhijit Y. Talwalkar | $626K | May 11, 2026 | filing ↗ |
| Mervin Smith | $295K | Mar 16, 2026 | filing ↗ |
| Mervin Smith | $103K | Feb 24, 2026 | filing ↗ |
| Marc Rosenbaum | $39K | Feb 24, 2026 | filing ↗ |
| Abhijit Y. Talwalkar | $774K | Feb 23, 2026 | filing ↗ |
| Chad Patterson | $52K | Dec 2, 2025 | filing ↗ |
| Abhijit Y. Talwalkar | $925K | Nov 10, 2025 | filing ↗ |
| Daniel Wilson | $1.7M | Oct 31, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Aug 11, 2026 | filing ↗ |
| Material agreement (1.01) | Aug 5, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Aug 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2026 | filing ↗ |
| Material agreement (1.01) | Jul 31, 2026 | filing ↗ |
| Earnings (2.02) | Jul 31, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 31, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 31, 2026 | filing ↗ |
| Cyber incident (1.05) | Jun 10, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 3, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 3, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 27, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 27, 2026 | filing ↗ |
| Earnings (2.02) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Auditor change (4.01) | Mar 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 30, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 12, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 12, 2026 | filing ↗ |
| Earnings (2.02) | Feb 19, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 19, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 12, 2025 | filing ↗ |
| Material agreement (1.01) | Oct 30, 2025 | filing ↗ |
| Earnings (2.02) | Oct 30, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 30, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 30, 2025 | filing ↗ |