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 Mar 31, 2025
Ownership Breakdown
269
Institutional Holders
▲ 23 vs Q4
$3.77B
Total Inst. Value
▲ $673.18M vs Q4
32.86M
Shares Outstanding
freeFloat 93.68%
35.98M
13F Shares Held
▲ 1.65M vs Q4
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
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC surgical & medical instruments & apparatus | 3.11M | 9.84% | 9.84% | $325.37B | May 9, 2025 | ▼ 28.2K |
SANDS CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 3.02M | 9.55% | 9.55% | $315.74B | May 14, 2025 | ▼ 160.5K |
ARTISAN PARTNERS LIMITED PARTNERSHIP surgical & medical instruments & apparatus | 2.81M | 8.91% | 8.91% | $294.60B | May 14, 2025 | ▲ 51.5K |
BLACKROCK, INC. surgical & medical instruments & apparatus | 2.70M | 8.56% | 8.56% | $282.99B | May 2, 2025 | ▼ 25.5K |
CAPITAL RESEARCH GLOBAL INVESTORS surgical & medical instruments & apparatus | 2.20M | 6.97% | 6.97% | $230.57B | May 12, 2025 | ▲ 565.6K |
MACKENZIE FINANCIAL CORP surgical & medical instruments & apparatus | 1.16M | 3.66% | 3.66% | $121.01B | May 7, 2025 | ▼ 226.0K |
STATE STREET CORP surgical & medical instruments & apparatus | 917.7K | 2.90% | 2.90% | $96.06B | May 15, 2025 | ▼ 31.1K |
UBS ASSET MANAGEMENT AMERICAS INC surgical & medical instruments & apparatus | 903.1K | 2.86% | 2.86% | $94.53B | May 19, 2025 | ▲ 568.3K |
BNP PARIBAS ASSET MANAGEMENT HOLDING S.A. surgical & medical instruments & apparatus | 879.8K | 2.79% | 2.79% | $92.10B | May 14, 2025 | ▼ 20.3K |
CHAMPLAIN INVESTMENT PARTNERS, LLC surgical & medical instruments & apparatus | 822.8K | 2.60% | 2.60% | $86.13B | May 14, 2025 | ▲ 96.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
20
Increased
+2.72M shares4
New Positions
first time holders25
Decreased
−1.85M shares0
Sold Out
fully exitedNet shares change (top 50)
+877.1K
+2.72M / −1.85M
Net new holders
-1
4 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 VANGUARD GROUP INC, holding approximately 3.11 million shares — equal to 9.84% of outstanding shares — as of March 31, 2025.
A total of 269 institutional investors currently hold IRTC stock, with a combined institutional value of approximately $3.77 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 VANGUARD GROUP INC with a 9.84% stake. Company insiders hold 6.32%. Data sourced from SEC Form 13F as of March 31, 2025.