# IRHYTHM TECHNOLOGIES INC COM

IRHYTHM TECHNOLOGIES INC COM is a security (CUSIP 450056106) tracked across SEC portfolio filings. 312 institutional managers reported $4.3B on Form 13F as of 2026-06-30; 33 registered fund positions totaling $252.6M via N-PORT as of 2026-05-31.

## Summary

- Issuer: IRHYTHM TECHNOLOGIES INC
- Class: COM
- CUSIP: 450056106
- Asset category: EC
- 13F holders: 312
- 13F value: $4.3B
- 13F period: 2026-06-30
- N-PORT fund positions: 33
- N-PORT value: $252.6M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 312 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $587.4M | 3,310,519 |
| BlackRock, Inc. | New York, NY | $323.6M | 2,741,505 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $197.2M | 1,608,014 |
| [RTW INVESTMENTS, LP](https://search.stillhousedata.com/firm/153232) | NEW YORK, NY | $196.9M | 1,668,500 |
| [Artisan Partners Limited Partnership](https://search.stillhousedata.com/firm/150114) | Milwaukee, WI | $171.2M | 1,450,907 |
| FMR LLC | BOSTON, MA | $160.7M | 1,361,919 |
| [Holocene Advisors, LP](https://search.stillhousedata.com/firm/287999) | New York, NY | $147.4M | 1,248,658 |
| UBS ASSET MANAGEMENT AMERICAS INC | CHICAGO, IL | $123.6M | 1,047,452 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $96.5M | 817,110 |
| STATE STREET CORP | BOSTON, MA | $93.0M | 788,302 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Paris, I0 | $89.9M | 762,062 |
| EVENTIDE ASSET MANAGEMENT, LLC | Boston, MA | $89.8M | 760,825 |
| [Stephens Investment Management Group LLC](https://search.stillhousedata.com/firm/136369) | LITTLE ROCK, AR | $82.5M | 693,437 |
| JPMORGAN CHASE & CO | NEW YORK, NY | $81.6M | 714,896 |
| FULLER & THALER ASSET MANAGEMENT, INC. | San Mateo, CA | $79.6M | 674,698 |

## Top fund holders (N-PORT)

_Showing 15 of 33 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD EXPLORER FUND](https://search.stillhousedata.com/fund/S000002578) | VANGUARD EXPLORER FUND | $59.2M | 27.21% |
| [SMALLCAP World Fund Inc](https://search.stillhousedata.com/fund/S000009599) | SMALLCAP World Fund Inc | $54.7M | 6.75% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $42.5M | 5.21% |
| [Columbia Acorn Fund](https://search.stillhousedata.com/fund/S000009184) | COLUMBIA ACORN TRUST | $20.0M | 89.24% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $18.7M | 10.64% |
| [VANGUARD STRATEGIC EQUITY FUND](https://search.stillhousedata.com/fund/S000002593) | VANGUARD HORIZON FUNDS | $14.5M | 14.33% |
| [Fidelity Advisor Health Care Fund](https://search.stillhousedata.com/fund/S000005329) | Fidelity Advisor Series VII | $11.0M | 38.03% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $6.2M | 12.81% |
| [HARTFORD SMALL CAP GROWTH HLS FUND](https://search.stillhousedata.com/fund/S000004108) | HARTFORD HLS SERIES FUND II INC | $5.7M | 74.42% |
| Liberty All-Star Growth Fund | LIBERTY ALL STAR GROWTH FUND INC. | $3.9M | 114.99% |
| [Small Cap Growth Fund](https://search.stillhousedata.com/fund/S000008021) | VALIC Co II | $3.0M | 101.36% |
| [Optimum Small-Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002424) | Optimum Fund Trust | $2.5M | 33.05% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $2.1M | 0.36% |
| [Embark Small Cap Equity Fund](https://search.stillhousedata.com/fund/S000083503) | Harbor Funds II | $2.0M | 35.11% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $1.8M | 0.60% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/450056106.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.