Security key
450056106
iRhythm Holdings, Inc. - Common Stock, $0.001 par value (IRTC)
CUSIP: 450056106
Q1 2025 13F Holders as of 31 Mar 2025
- Security type / class
- Equity / Common Stock, $0.001 par value
- Total 13F shares
- 35,983,114
- Total 13F value
- $3,768,006,864
- Share change
- +1,664,347
- Put/Call ratio
- 136%
- SEC-reported price per share
- $104.68
- Number of holders
- 254
- Value change
- +$183,883,851
- Number of buys
- 131
- Number of sells
- 102
- Shares outstanding
- 32,086,538
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2025
Institutions
254
Top holders
10
IRTC full security history
Ownership snapshot
Full 13F holder table
iRhythm Holdings, Inc. SEC filings
iRhythm Holdings, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of IRTC - iRhythm Holdings, Inc. - Common Stock, $0.001 par value (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
SANDS CAPITAL MANAGEMENT,...
Disclosed value leader
SANDS CAPITAL MANAGEMENT,...
Comparable rows
15/15
Latest evidence
31 Dec 2024
13F
Lead comparable stake: 9.9%
Showing 1-6 of 15 holder rows.
Quick read
SANDS CAPITAL MANAGEMENT, LLC leads the comparable SEC ownership view at 9.9%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens SANDS CAPITAL MANAGEMENT, LLC's linked filing trail.
Comparable ownership
Top 5
SANDS CAPITAL MANAGEMENT, LLC
9.9%
VANGUARD GROUP INC
9.8%
MACKENZIE FINANCIAL CORP
8.6%
Artisan Partners Limited Partnership
8.6%
BlackRock, Inc.
8.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| SANDS CAPITAL MANAGEMENT, LLC |
13F
Company
|
9.9%
|
$286,443,219
3,176,702 shares
|
— | 31 Dec 2024 |
| VANGUARD GROUP INC |
13F
Company
|
9.8%
|
$282,806,483
3,136,370 shares
|
— | 31 Dec 2024 |
| MACKENZIE FINANCIAL CORP |
13F
Company
|
8.6%
|
$172,764,426
2,763,884 shares
|
— | 31 Dec 2024 |
| Artisan Partners Limited Partnership |
13F
Company
|
8.6%
|
$249,115,725
2,762,734 shares
|
— | 31 Dec 2024 |
| BlackRock, Inc. |
13F
Company
|
8.5%
|
$246,060,947
2,728,856 shares
|
— | 31 Dec 2024 |
| Capital Research Global Investors |
13F
Company
|
5.1%
|
$147,610,634
1,637,026 shares
|
— | 31 Dec 2024 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
254
Shares
35,983,114
Rows available
254
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2025 vs Q1 2025 Across Filers
Q1 2025 holders
254
Q1 2025 holders
254
Holder diff
0
| Investor | Q1 2025 Shares | Q1 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q1 2025 value | Value change | Value Chg % |
|---|