Security key
450056106
iRhythm Holdings, Inc. - Common Stock, $0.001 par value (IRTC)
CUSIP: 450056106
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock, $0.001 par value
- Total 13F shares
- 35,179,951
- Total 13F value
- $6,241,813,053
- Share change
- +550,640
- Put/Call ratio
- 267%
- SEC-reported price per share
- $177.44
- Number of holders
- 336
- Value change
- +$101,371,006
- Number of buys
- 142
- Number of sells
- 163
- 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
Q4 2025
Institutions
336
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
Artisan Partners Limited ...
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
15/15
Latest evidence
30 Sep 2025
13F
13D/G
3/4/5
Lead comparable stake: 4.7%
13D/G row: Artisan Partners Limited Partnership
Showing 1-6 of 15 holder rows.
Quick read
Artisan Partners Limited Partnership leads the comparable SEC ownership view at 4.7%.
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 Artisan Partners Limited Partnership's linked filing trail.
Comparable ownership
Top 5
Artisan Partners Limited Partnership
4.7%
Capital Research Global Investors
4.7%
Mark J. Rubash
0.04%
Ralph Snyderman
0.04%
VANGUARD GROUP INC
10%
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 |
|---|---|---|---|---|---|
| Artisan Partners Limited Partnership |
13F
13D/G
Company · Artisan Partners Asset Management Inc.
|
4.7%
from 13D/G
|
$441,586,561
2,567,513 shares
|
— | 30 Sep 2025 |
| Capital Research Global Investors |
13D/G
13F
Company
|
4.7%
|
$204,843,092
1,506,864 shares
|
-$94,581,343 | 30 Jun 2025 |
| Mark J. Rubash |
3/4/5
Director
|
0.04%
|
$1,470,352
13,788 shares
|
— | 28 May 2025 |
| Ralph Snyderman |
3/4/5
Director
|
0.04%
|
$1,417,032
13,288 shares
|
— | 28 May 2025 |
| VANGUARD GROUP INC |
13F
Company
|
10%
|
$557,264,627
3,240,099 shares
|
— | 30 Sep 2025 |
| BlackRock, Inc. |
13F
Company
|
9%
|
$494,553,075
2,875,476 shares
|
— | 30 Sep 2025 |
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 Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
336
Shares
35,179,951
Rows available
336
| 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 Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
335
Q4 2025 holders
336
Holder diff
1
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|