San Francisco, CA
IRHYTHM HOLDINGS, INC.IRTC— Latest position per institution from SEC 13F filings
15
Institutional holders
28.33M
Total shares held
3.63B
Estimated value
1.42M
Avg. position size
VANGUARD GROUP INC
CIK 102909
Shares
3.31M
Value
587.42M
Filed
Dec 31, 2025
BLACKROCK, INC.
CIK 2012383
Shares
2.99M
Value
355.15M
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
2.50M
Value
269.35M
Filed
Jun 30, 2024
RTW INVESTMENTS, LP
CIK 1493215
Shares
2.18M
Value
259.62M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
1.91M
Value
227.67M
Filed
Jun 30, 2026
SANDS CAPITAL MANAGEMENT, LLC
CIK 1020066
Shares
1.70M
Value
301.59M
Filed
Dec 31, 2025
ARTISAN PARTNERS LIMITED PARTNERSHIP
CIK 1466153
Shares
1.66M
Value
197.49M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.46M
Value
174.05M
Filed
Jun 30, 2026
MILLENNIUM MANAGEMENT LLC
CIK 1273087
Shares
1.41M
Value
167.30M
Filed
Jun 30, 2026
FMR LLC
CIK 315066
Shares
1.19M
Value
141.79M
Filed
Jun 30, 2026
UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC
CIK 861177
Shares
944.52K
Value
112.35M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
881.90K
Value
104.92M
Filed
Jun 30, 2026
EVENTIDE ASSET MANAGEMENT, LLC
CIK 1442891
Shares
880.34K
Value
104.71M
Filed
Jun 30, 2026
BNP PARIBAS ASSET MANAGEMENT HOLDING S.A.
CIK 1520354
Shares
866.53K
Value
103.07M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
856.52K
Value
101.88M
Filed
Jun 30, 2026
HOLOCENE ADVISORS, LP
CIK 1700574
Shares
783.64K
Value
93.21M
Filed
Jun 30, 2026
JPMORGAN CHASE & CO
CIK 19617
Shares
766.22K
Value
90.92M
Filed
Jun 30, 2026
STEPHENS INVESTMENT MANAGEMENT GROUP LLC
CIK 1314440
Shares
693.44K
Value
82.48M
Filed
Jun 30, 2026
FULLER & THALER ASSET MANAGEMENT, INC.
CIK 1082327
Shares
685.50K
Value
81.54M
Filed
Jun 30, 2026
BRAIDWELL LP
CIK 1920938
Shares
654.26K
Value
77.82M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | 102909 | 3.31M | 587.42M | Dec 31, 2025 |
| 2 | BLACKROCK, INC. | 2012383 | 2.99M | 355.15M | Jun 30, 2026 |
| 3 | BLACKROCK FINANCE, INC. | 1364742 | 2.50M | 269.35M | Jun 30, 2024 |
| 4 | RTW INVESTMENTS, LP | 1493215 | 2.18M | 259.62M | Jun 30, 2026 |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 1.91M | 227.67M | Jun 30, 2026 |
| 6 | SANDS CAPITAL MANAGEMENT, LLC | 1020066 | 1.70M | 301.59M | Dec 31, 2025 |
| 7 | ARTISAN PARTNERS LIMITED PARTNERSHIP | 1466153 | 1.66M | 197.49M | Jun 30, 2026 |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.46M | 174.05M | Jun 30, 2026 |
| 9 | MILLENNIUM MANAGEMENT LLC | 1273087 | 1.41M | 167.30M | Jun 30, 2026 |
| 10 | FMR LLC | 315066 | 1.19M | 141.79M | Jun 30, 2026 |
| 11 | UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC | 861177 | 944.52K | 112.35M | Jun 30, 2026 |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 881.90K | 104.92M | Jun 30, 2026 |
| 13 | EVENTIDE ASSET MANAGEMENT, LLC | 1442891 | 880.34K | 104.71M | Jun 30, 2026 |
| 14 | BNP PARIBAS ASSET MANAGEMENT HOLDING S.A. | 1520354 | 866.53K | 103.07M | Jun 30, 2026 |
| 15 | STATE STREET CORP | 93751 | 856.52K | 101.88M | Jun 30, 2026 |
| 16 | HOLOCENE ADVISORS, LP | 1700574 | 783.64K | 93.21M | Jun 30, 2026 |
| 17 | JPMORGAN CHASE & CO | 19617 | 766.22K | 90.92M | Jun 30, 2026 |
| 18 | STEPHENS INVESTMENT MANAGEMENT GROUP LLC | 1314440 | 693.44K | 82.48M | Jun 30, 2026 |
| 19 | FULLER & THALER ASSET MANAGEMENT, INC. | 1082327 | 685.50K | 81.54M | Jun 30, 2026 |
| 20 | BRAIDWELL LP | 1920938 | 654.26K | 77.82M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.