Irhythm Holdings Inc. (irtc 1.5 09/01/29)
13F holders, Q1 2026 (March 31)At the end of Q1 2026, 10 institutions reported holding Irhythm Holdings Inc. (irtc 1.5 09/01/29) in their 13F filings, unchanged from Q4 2025. 4 opened new positions and 4 sold out. The largest holders were Tudor Investment Corporation ($22.0M), Ssi Investment Management LLC ($5.1M) and Balyasny Asset Management L.P. ($3.3M). One famous investor held it Paul Tudor Jones (0.1% of Tudor Investment Corporation's portfolio).
- Company
- Irhythm Holdings Inc. (irtc 1.5 09/01/29)
- CUSIP
- 450056AB2
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 4 | $30.3M |
| Exits | 4 | $3.9M |
All 13F filers, Q4 2025 → Q1 2026: 27,647,000 shares bought and 60,940 shares sold, net +27,586,060 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 10 holders
| Tudor Investment Corporation | 0.12% | New | 20,000,000 | $22.0M |
| Ssi Investment Management LLC | 0.42% | New | 4,636,000 | $5.1M |
| Balyasny Asset Management L.P. | 0.01% | New | 3,000,000 | $3.3M |
| State of Wisconsin Investment Board | 0.01% | No change | 3,000,000 | $3.3M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.00% | No change | 2,500,000 | $2.7M |
| Sei Investments Co. | 0.00% | No change | 269,000 | $293K |
| Bank of New York Mellon Corp | 0.00% | No change | 200,000 | $219K |
| Oppenheimer Asset Management Inc. | 0.00% | Reduce -1.4% | 70,000 | $76K |
| Stephens Inc. | 0.00% | No change | 21,000 | $23K |
| Boussard & Gavaudan Investment Management LLP | 0.00% | New | 11,000 | $12K |
"% of holder's portfolio" is IRHYTHM HOLDINGS INC (IRTC 1.5 09/01/29)'s weight in each manager's 13F, not the share of Irhythm Holdings Inc. (irtc 1.5 09/01/29) the manager owns.