iRhythm Technologies, Inc.
iRhythm Technologies, Inc. (IRTC) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · IRTC · as of Sep 30, 2025
Ownership Breakdown
350
Institutional Holders
▲ 31 vs Q2
$5.96B
Total Inst. Value
▲ $520.32M vs Q2
32.86M
Shares Outstanding
freeFloat 93.68%
34.71M
13F Shares Held
▼ 685,244 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
IRTC largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
TUDOR INVESTMENT CORP ET AL surgical & medical instruments & apparatus | 20.00M | 62.17% | 62.17% | $27.45B | Nov 14, 2025 | NEW |
VANGUARD GROUP INC surgical & medical instruments & apparatus | 3.24M | 10.07% | 10.07% | $557.26B | Nov 7, 2025 | ▲ 4.4K |
BLACKROCK, INC. surgical & medical instruments & apparatus | 2.88M | 8.94% | 8.94% | $494.55B | Nov 12, 2025 | ▲ 125.8K |
ARTISAN PARTNERS LIMITED PARTNERSHIP surgical & medical instruments & apparatus | 2.57M | 7.98% | 7.98% | $441.59B | Nov 12, 2025 | ▼ 173.3K |
SANDS CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 2.24M | 6.95% | 6.95% | $384.59B | Nov 13, 2025 | ▼ 679.4K |
CAPITAL RESEARCH GLOBAL INVESTORS surgical & medical instruments & apparatus | 1.18M | 3.68% | 3.68% | $203.59B | Nov 13, 2025 | ▼ 323.1K |
STATE STREET CORP surgical & medical instruments & apparatus | 847.9K | 2.64% | 2.64% | $145.83B | Nov 14, 2025 | ▼ 20.6K |
GEODE CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 790.1K | 2.46% | 2.46% | $135.91B | Nov 12, 2025 | ▲ 22.8K |
BLAIR WILLIAM & CO/IL surgical & medical instruments & apparatus | 740.7K | 2.30% | 2.30% | $127.40B | Nov 12, 2025 | ▲ 1.4K |
EVENTIDE ASSET MANAGEMENT, LLC surgical & medical instruments & apparatus | 691.5K | 2.15% | 2.15% | $118.92B | Nov 14, 2025 | ▼ 61 |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
24
Increased
+2.42M shares1
New Positions
first time holders25
Decreased
−2.67M shares0
Sold Out
fully exitedNet shares change (top 50)
258.2K
+2.42M / −2.67M
Net new holders
+0
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
IRTC insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
8
Buy transactions
7
Sell transactions
1.14
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Turakhia Minang CHIEF MED/SCI OFCR EVP ADVTECH | May 29, 2026 | Award | 137 | $96.81 | $13.3K | 55.0K | Form 4 ↗ |
Patterson Chad CHIEF COMM & PRODUCT OFFICER | May 29, 2026 | Award | 177 | $96.81 | $17.1K | 58.3K | Form 4 ↗ |
Freeman Sean Clinton EVP, Strategy & Corp Devt | May 29, 2026 | Award | 273 | $96.81 | $26.4K | 14.6K | Form 4 ↗ |
Blackford Quentin S. President and CEO | May 29, 2026 | Award | 178 | $96.81 | $17.2K | 204.3K | Form 4 ↗ |
Bairey Merz Cathleen Noel director | May 27, 2026 | Award | 1,573 | — | — | 10.5K | Form 4 ↗ |
Bodaken Bruce G. director | May 27, 2026 | Award | 1,573 | — | — | 14.2K | Form 4 ↗ |
Ling Karen director | May 27, 2026 | Award | 1,573 | — | — | 11.1K | Form 4 ↗ |
MCGINNIS KAREN K director | May 27, 2026 | Award | 1,573 | — | — | 3.6K | Form 4 ↗ |
OBOYLE KEVIN C director | May 27, 2026 | Award | 1,573 | — | — | 3.6K | Form 4 ↗ |
TALWALKAR ABHIJIT Y director | May 27, 2026 | Award | 1,573 | — | — | 21.9K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
iRhythm Technologies, Inc. (IRTC) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 6.32%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of iRhythm Technologies, Inc. is TUDOR INVESTMENT CORP ET AL, holding approximately 20.00 million shares — equal to 62.17% of outstanding shares — as of September 30, 2025.
A total of 350 institutional investors currently hold IRTC stock, with a combined institutional value of approximately $5.96 billion as of the most recent 13F filing period.
Frequently asked questions
IRTC ownershipiRhythm Technologies, Inc. (IRTC) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is TUDOR INVESTMENT CORP ET AL with a 62.17% stake. Company insiders hold 6.32%. Data sourced from SEC Form 13F as of September 30, 2025.