iRhythm Holdings, Inc.
IRTC- Exchange
- Nasdaq
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0001388658
In the last 90 days, iRhythm Holdings, Inc. insiders filed 0 open-market purchases and 11 sales; 303 institutions reported holding it in 13F filings for Q2 2026, worth $4.24B in total; no superinvestor holds it.
Holders of 5% or more of IRTC
Holders whose latest Schedule 13D or 13G filing reports 5% or more of iRhythm Holdings, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| RTW Investments, LP | 13G/A | 6.60%2.18M shares | +1.40 ppfrom 5.20% | May 15, 20262 filings | Aug 14, 2026 | SEC |
| Vanguard Portfolio Management LLC | 13G | 5.64%1.82M shares | New | Apr 28, 20261 filing | Apr 28, 2026 | SEC |
| Vanguard Capital Management LLC | 13G | 5.23%1.69M shares | New | Apr 27, 20261 filing | Apr 27, 2026 | SEC |
| Millennium Management LLC | 13G | 5.10%1.66M shares | New | Mar 23, 20261 filing | Mar 23, 2026 | SEC |
| Artisan Partners Limited Partnership | 13G | 5.10%1.66M shares | +0.40 ppfrom 4.70% | Feb 12, 20244 filings | Aug 13, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
43 Schedule 13D and 13G filings on iRhythm Holdings, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 20268:00 AM ET | RTW Investments, LPand 1 other | 13G/A | 6.60%2.18M shares | +1.40 ppfrom 5.20% | Jun 30, 2026 | SEC |
| Aug 13, 20264:30 PM ET | Artisan Partners Limited Partnershipand 3 others | 13G | 5.10%1.66M shares | +0.40 ppfrom 4.70% | Jun 30, 2026 | SEC |
| May 15, 20268:24 AM ET | RTW Investments, LPand 1 other | 13G | 5.20%1.67M shares | New | Mar 31, 2026 | SEC |
| May 8, 20262:59 PM ET | Sands Capital Management, LLCand 1 other | 13G/A | 0.00%0 shares | −5.30 ppfrom 5.30%Below 5% | Mar 31, 2026 | SEC |
| Apr 28, 20262:09 PM ET | Vanguard Portfolio Management LLC | 13G | 5.64%1.82M shares | New | Mar 31, 2026 | SEC |
| Apr 27, 20265:06 PM ET | Vanguard Capital Management LLC | 13G | 5.23%1.69M shares | New | Mar 31, 2026 | SEC |
| Mar 26, 202610:47 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −10.02 ppfrom 10.02%Below 5% | Mar 13, 2026 | SEC |
| Mar 23, 20264:43 PM ET | Millennium Management LLCand 2 others | 13G | 5.10%1.66M shares | New | Mar 16, 2026 | SEC |
| Feb 13, 202611:25 AM ET | Sands Capital Management, LLCand 1 other | 13G/A | 5.30%1.70M shares | −1.60 ppfrom 6.90% | Dec 31, 2025 | SEC |
| Feb 3, 20262:00 PM ET | Artisan Partners Limited Partnershipand 3 others | 13G/A | 4.70%1.51M shares | –Below 5% | Dec 31, 2025 | SEC |
| Nov 13, 20252:34 PM ET | Sands Capital Management, LLCand 1 other | 13G/A | 6.90%2.24M shares | – | Sep 30, 2025 | SEC |
| Aug 13, 202511:39 AM ET | Capital Research Global Investors | 13G/A | 4.70%1.51M shares | −2.30 ppfrom 7.00%Below 5% | Jun 30, 2025 | SEC |
| May 13, 202511:32 AM ET | Capital Research Global Investors | 13G/A | 7.00%2.20M shares | +1.80 ppfrom 5.20% | Mar 31, 2025 | SEC |
| Feb 13, 20252:15 PM ET | Capital Research Global Investors | 13G/A | 5.20%1.64M shares | – | Dec 31, 2024 | SEC |
| Jan 8, 202511:30 AM ET | Vanguard Group Inc | 13G/A | 10.02%3.14M shares | – | Dec 31, 2024 | SEC |
| Nov 12, 2024 | Capital Research Global Investors | 13G/AOld format | – | – | – | SEC |
| Nov 12, 2024 | Artisan Partners Limited Partnership | 13G/AOld format | – | – | – | SEC |
| Nov 7, 2024 | Sands Capital Management, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2024 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2024 | Sands Capital Management, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2024 | Artisan Partners Limited Partnership | 13GOld format | – | New | – | SEC |
| Feb 9, 2024 | Capital Research Global Investors | 13GOld format | – | – | – | SEC |
| Jan 25, 20244:59 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2023 | Sands Capital Management, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2023 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 31, 20231:58 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 27, 2023 | Mackenzie Financial Corp | 13G/AOld format | – | – | – | SEC |
| Nov 7, 2022 | JPMorgan Chase & Co | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Sands Capital Management, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Price T Rowe Associates Inc | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2022 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 4, 2022 | Mackenzie Financial Corp | 13G/AOld format | – | – | – | SEC |
| Feb 2, 20227:11 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 24, 2022 | JPMorgan Chase & Co | 13GOld format | – | New | – | SEC |
| Jul 9, 2021 | Brown Capital Management LLC | 13G/AOld format | – | – | – | SEC |
| Feb 16, 2021 | Capital Research Global Investors | 13G/AOld format | – | – | – | SEC |
| Feb 16, 2021 | Price T Rowe Associates Inc | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2021 | Brown Capital Management LLC | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 5, 2021 | Norges Bank | 13G/AOld format | – | – | – | SEC |
| Feb 4, 2021 | Wellington Management Group LLP | 13G/AOld format | – | – | – | SEC |
| Jan 29, 20215:23 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 12, 2021 | Sands Capital Management, LLC | 13GOld format | – | New | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell iRhythm Holdings, Inc. shares.
No Form 144 notices for iRhythm Holdings, Inc. are on file.