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 1 sale; 305 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 |
|---|---|---|---|---|---|---|
| Artisan Partners Limited Partnership | 13G/A | 6.70%2.20M shares | +1.60 ppfrom 5.10% | Feb 12, 20245 filings | Nov 12, 2026 | SEC |
| 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 |
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
45 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 |
|---|---|---|---|---|---|---|
| Nov 12, 20267:00 AM ET | Artisan Partners Limited Partnershipand 3 others | 13G/A | 6.70%2.20M shares | +1.60 ppfrom 5.10% | Sep 30, 2026 | SEC |
| Oct 13, 20266:02 PM ET | Millennium Management LLCand 2 others | 13G/A | 1.10%349.1K shares | −4.00 ppfrom 5.10%Below 5% | Sep 30, 2026 | SEC |
| 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
24 notices from officers, directors and other affiliates planning to sell iRhythm Holdings, Inc. shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| May 11, 20265:04 PM ET | Abhijit Y TalwalkarDirector | 5.31K | $626.4K | May 11, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Mar 16, 20264:13 PM ET | Mervin SmithOfficer | 2.58K | $295.5K | Mar 16, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 24, 20264:16 PM ET | Mervin SmithOfficer | 732 | $103.1K | Feb 24, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 24, 20264:10 PM ET | Marc RosenbaumOfficer | 280 | $39.5K | Feb 24, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 23, 20264:24 PM ET | Abhijit Y TalwalkarDirector | 5.31K | $774.0K | Feb 23, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 2, 20254:01 PM ET | Chad PattersonOfficer | 280 | $51.8K | Dec 2, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Nov 10, 20254:02 PM ET | Abhijit Y TalwalkarDirector | 5.31K | $925.0K | Nov 10, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Oct 31, 20254:07 PM ET | Daniel WilsonOfficer | 8.00K | $1.66M | Oct 31, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 3, 20254:16 PM ET | Daniel WilsonOfficer | 5.00K | $875.0K | Sep 3, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 22, 20254:02 PM ET | Sumi ShrishrimalOfficer | 653 | $109.1K | Aug 22, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 11, 20254:18 PM ET | Abhijit Y TalwalkarDirector | 5.31K | $839.4K | Aug 11, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 11, 20254:04 PM ET | Marc RosenbaumOfficer | 226 | $35.9K | Aug 11, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 6, 20254:05 PM ET | Chad PattersonOfficer | 2.56K | $406.2K | Aug 6, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 5, 20255:06 PM ET | Quentin BlackfordOfficer · Director | 30.0K | $4.82M | Aug 5, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 5, 20254:51 PM ET | Mark Jeffrey RubashDirector | 15.0K | $2.41M | Aug 5, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jun 23, 20254:36 PM ET | Daniel WilsonOfficer | 3.00K | $450.0K | Jun 23, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jun 23, 20254:13 PM ET | Chad PattersonOfficer | 936 | $140.4K | Jun 23, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jun 10, 20256:06 PM ET | Chad PattersonOfficer | 363 | $54.5K | Jun 10, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 2, 20254:14 PM ET | Daniel WilsonOfficer | 2.00K | $250.0K | May 2, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 2, 20254:13 PM ET | Chad PattersonOfficer | 8.51K | $1.03M | May 2, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 25, 20254:00 PM ET | Chad PattersonOfficer | 461 | $54.8K | Feb 25, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jun 18, 20244:11 PM ET | Mark J DayOfficer | 3.00K | $300.0K | Jun 18, 202410b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 31, 20235:04 PM ET | Cathleen Noel Bairey MerzDirector | 509 | $60.4K | May 31, 202310b5-1 | E*TRADE FINANCIAL CORPORATION | SEC |
| May 16, 20236:37 PM ET | Devine DouglasOfficer | 3.98K | $534.6K | May 16, 2023 | ETRADE FINANCIAL CORPORATION | SEC |