San Francisco, CA
IRHYTHM HOLDINGS, INC.IRTC— Latest position per institution from SEC 13F filings
15
Institutional holders
47.13M
Total shares held
3.55B
Estimated value
2.36M
Avg. position size
TUDOR INVESTMENT CORP ET AL
CIK 923093
Shares
20M
Value
27.45M
Filed
Sep 30, 2025
VANGUARD GROUP INC
CIK 102909
Shares
3.31M
Value
587.42M
Filed
Dec 31, 2025
BLACKROCK, INC.
CIK 2012383
Shares
2.74M
Value
323.55M
Filed
Mar 31, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
2.50M
Value
269.35M
Filed
Jun 30, 2024
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
1.80M
Value
212.01M
Filed
Mar 31, 2026
SANDS CAPITAL MANAGEMENT, LLC
CIK 1020066
Shares
1.70M
Value
301.59M
Filed
Dec 31, 2025
MILLENNIUM MANAGEMENT LLC
CIK 1273087
Shares
1.67M
Value
197.15M
Filed
Mar 31, 2026
RTW INVESTMENTS, LP
CIK 1493215
Shares
1.67M
Value
196.92M
Filed
Mar 31, 2026
ARTISAN PARTNERS LIMITED PARTNERSHIP
CIK 1466153
Shares
1.45M
Value
171.24M
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.45M
Value
170.62M
Filed
Mar 31, 2026
FMR LLC
CIK 315066
Shares
1.36M
Value
160.73M
Filed
Mar 31, 2026
HOLOCENE ADVISORS, LP
CIK 1700574
Shares
1.25M
Value
147.37M
Filed
Mar 31, 2026
UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC
CIK 861177
Shares
1.05M
Value
123.62M
Filed
Mar 31, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
817.11K
Value
96.45M
Filed
Mar 31, 2026
STATE STREET CORP
CIK 93751
Shares
788.30K
Value
93.04M
Filed
Mar 31, 2026
BNP PARIBAS ASSET MANAGEMENT HOLDING S.A.
CIK 1520354
Shares
762.06K
Value
89.94M
Filed
Mar 31, 2026
EVENTIDE ASSET MANAGEMENT, LLC
CIK 1442891
Shares
760.83K
Value
89.77M
Filed
Mar 31, 2026
JPMORGAN CHASE & CO
CIK 19617
Shares
758.59K
Value
134.60M
Filed
Dec 31, 2025
FULLER & THALER ASSET MANAGEMENT, INC.
CIK 1082327
Shares
674.70K
Value
79.63M
Filed
Mar 31, 2026
BLAIR WILLIAM & CO/IL
CIK 902367
Shares
628.38K
Value
74.16M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | TUDOR INVESTMENT CORP ET AL | 923093 | 20M | 27.45M | Sep 30, 2025 |
| 2 | VANGUARD GROUP INC | 102909 | 3.31M | 587.42M | Dec 31, 2025 |
| 3 | BLACKROCK, INC. | 2012383 | 2.74M | 323.55M | Mar 31, 2026 |
| 4 | BLACKROCK FINANCE, INC. | 1364742 | 2.50M | 269.35M | Jun 30, 2024 |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 1.80M | 212.01M | Mar 31, 2026 |
| 6 | SANDS CAPITAL MANAGEMENT, LLC | 1020066 | 1.70M | 301.59M | Dec 31, 2025 |
| 7 | MILLENNIUM MANAGEMENT LLC | 1273087 | 1.67M | 197.15M | Mar 31, 2026 |
| 8 | RTW INVESTMENTS, LP | 1493215 | 1.67M | 196.92M | Mar 31, 2026 |
| 9 | ARTISAN PARTNERS LIMITED PARTNERSHIP | 1466153 | 1.45M | 171.24M | Mar 31, 2026 |
| 10 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.45M | 170.62M | Mar 31, 2026 |
| 11 | FMR LLC | 315066 | 1.36M | 160.73M | Mar 31, 2026 |
| 12 | HOLOCENE ADVISORS, LP | 1700574 | 1.25M | 147.37M | Mar 31, 2026 |
| 13 | UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC | 861177 | 1.05M | 123.62M | Mar 31, 2026 |
| 14 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 817.11K | 96.45M | Mar 31, 2026 |
| 15 | STATE STREET CORP | 93751 | 788.30K | 93.04M | Mar 31, 2026 |
| 16 | BNP PARIBAS ASSET MANAGEMENT HOLDING S.A. | 1520354 | 762.06K | 89.94M | Mar 31, 2026 |
| 17 | EVENTIDE ASSET MANAGEMENT, LLC | 1442891 | 760.83K | 89.77M | Mar 31, 2026 |
| 18 | JPMORGAN CHASE & CO | 19617 | 758.59K | 134.60M | Dec 31, 2025 |
| 19 | FULLER & THALER ASSET MANAGEMENT, INC. | 1082327 | 674.70K | 79.63M | Mar 31, 2026 |
| 20 | BLAIR WILLIAM & CO/IL | 902367 | 628.38K | 74.16M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.