Which funds own IRTC
Irhythm Holdings Inc in the Q2 2026 filings. At least 2 of the 91 current managers on file reported a position, worth $291m between them. It is among the largest positions of fewer than a fifth of the current managers on file. The quarter went the other way: 4 managers trimmed or sold out against 1 buying.
- Managers holding
- 2
- at least, of 91 current
- Combined value
- $291m
- as reported
- Opened
- 0
- new this quarter
- Added to
- 1
- already held
- Trimmed or sold out
- 4
- 3 sold out entirely
Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.
Managers reporting a position
Largest first. Weight is the share of that manager’s whole reported book, which is the number worth quoting: $400m is a rounding error in one book and a defining bet in another.
| Manager | Value | Weight | Shares | Change on the quarter | Action |
|---|---|---|---|---|---|
| Artisan Partners LP Long-only · $63.1bn book | $198m | 0.3% | 1,660,307 | +$26m+209,400 | Added |
| Holocene Advisors LP Long/short equity · $44.4bn book | $93m | 0.2% | 783,636 | -$54m-465,022 | Trimmed |
Sold out of this quarter
Valued at what the position was worth in the previous filing, because by this one it is gone.
- Point72 Asset Management LP · Multi-strategy$36m held before
- Millennium Management LLC · Multi-strategy$12m held before
- Two Sigma Investments LP · Quantitative$6.2m held before
Ownership through time
At least 5 of the 95 managers whose filings are on file listed IRTC in Q2 2026, against 2 in Q4 2016. 2 managers fewer than in Q1 2026: 2 no longer listed it among the positions read, which can mean a holding below the listed range, a filing that reported no holdings, or a filing not yet made.
Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.
- Q4 2016: 2
- Q1 2017: 1
- Q2 2017: 4
- Q3 2017: 4
- Q4 2017: 4
- Q1 2018: 5
- Q2 2018: 5
- Q3 2018: 7
- Q4 2018: 8
- Q1 2019: 6
- Q2 2019: 8
- Q3 2019: 6
- Q4 2019: 7
- Q1 2020: 6
- Q2 2020: 7
- Q3 2020: 10
- Q4 2020: 11
- Q1 2021: 10
- Q2 2021: 8
- Q3 2021: 5
- Q4 2021: 5
- Q1 2022: 9
- Q2 2022: 9
- Q3 2022: 7
- Q4 2022: 7
- Q1 2023: 10
- Q2 2023: 8
- Q3 2023: 5
- Q4 2023: 9
- Q1 2024: 7
- Q2 2024: 5
- Q3 2024: 5
- Q4 2024: 4
- Q1 2025: 6
- Q2 2025: 10
- Q3 2025: 8
- Q4 2025: 8
- Q1 2026: 7
- Q2 2026: 5
- Q4 2016: $45m
- Q1 2017: $44m
- Q2 2017: $163m
- Q3 2017: $191m
- Q4 2017: $220m
- Q1 2018: $249m
- Q2 2018: $365m
- Q3 2018: $388m
- Q4 2018: $302m
- Q1 2019: $238m
- Q2 2019: $344m
- Q3 2019: $213m
- Q4 2019: $303m
- Q1 2020: $306m
- Q2 2020: $636m
- Q3 2020: $1.4bn
- Q4 2020: $1.7bn
- Q1 2021: $663m
- Q2 2021: $152m
- Q3 2021: $44m
- Q4 2021: $213m
- Q1 2022: $700m
- Q2 2022: $434m
- Q3 2022: $555m
- Q4 2022: $521m
- Q1 2023: $714m
- Q2 2023: $608m
- Q3 2023: $602m
- Q4 2023: $835m
- Q1 2024: $851m
- Q2 2024: $864m
- Q3 2024: $475m
- Q4 2024: $406m
- Q1 2025: $603m
- Q2 2025: $847m
- Q3 2025: $938m
- Q4 2025: $895m
- Q1 2026: $718m
- Q2 2026: $516m
Between the quarter ends of Q1 2026 and Q2 2026. Each change in shares is valued at the Q2 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.
Started in Q2 2026
No manager on file started a position.
Largest increases, by shares
- Artisan Partners LP1,450,907 to 1,660,307 shares+$25m
- Schonfeld Strategic Advisors LLC88,133 to 152,062 shares+$7.6m
Largest decreases, by shares
- Holocene Advisors LP1,248,658 to 783,636 shares-$55m
- Millennium Management LLC1,608,014 to 1,406,454 shares-$24m
- Capital Research Global Investors509,590 to 335,209 shares-$21m
Left it
No manager on file is shown leaving it.
| Manager | Value over time | First listed | Largest | Q2 2026 |
|---|---|---|---|---|
| Artisan Partners LP | Q1 2020 | $442m | $197m | |
| Millennium Management LLC | Q2 2017 | $190m | $167m | |
| Holocene Advisors LP | Q3 2019 | $147m | $93m | |
| Capital Research Global Investors | Q4 2016 | $289m | $40m | |
| Schonfeld Strategic Advisors LLC | Q2 2017 | $18m | $18m | |
| T. Rowe Price Associates Inc | Q2 2020 | $430m | last listed Q1 2021 | |
| AllianceBernstein LP | Q3 2017 | $251m | last listed Q3 2024 | |
| Invesco Ltd | Q3 2020 | $202m | last listed Q4 2020 | |
| Neuberger Berman Group LLC | Q2 2020 | $155m | last listed Q4 2020 | |
| Arrowstreet Capital LP | Q3 2025 | $108m | last listed Q1 2026 | |
| Janus Henderson Group Ltd | Q1 2022 | $75m | last listed Q1 2023 | |
| Point72 Asset Management LP | Q4 2016 | $71m | last listed Q1 2026 | |
| Balyasny Asset Management LLC | Q2 2018 | $47m | last listed Q4 2023 | |
| Man Group PLC | Q2 2019 | $41m | last listed Q3 2025 | |
| Two Sigma Investments LP | Q2 2021 | $32m | last listed Q2 2021 |
What IRTC is worth
Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.
Build the comp set around IRTC →How much of the picture this is
A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.
What to do with a name the funds are buying
Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.
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The holdings, every quarter, and the week between
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