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Free · no sign-up · Q2 2026

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.

ManagerValueWeightSharesChange on the quarterAction
Artisan Partners LP
Long-only · $63.1bn book
$198m0.3%1,660,307+$26m+209,400Added
Holocene Advisors LP
Long/short equity · $44.4bn book
$93m0.2%783,636-$54m-465,022Trimmed

Sold out of this quarter

Valued at what the position was worth in the previous filing, because by this one it is gone.

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.

Managers on file listing it
0611Q4 2016: 2Q1 2017: 117Q2 2017: 4Q3 2017: 4Q4 2017: 4Q1 2018: 518Q2 2018: 5Q3 2018: 7Q4 2018: 8Q1 2019: 619Q2 2019: 8Q3 2019: 6Q4 2019: 7Q1 2020: 620Q2 2020: 7Q3 2020: 10Q4 2020: 11Q1 2021: 1021Q2 2021: 8Q3 2021: 5Q4 2021: 5Q1 2022: 922Q2 2022: 9Q3 2022: 7Q4 2022: 7Q1 2023: 1023Q2 2023: 8Q3 2023: 5Q4 2023: 9Q1 2024: 724Q2 2024: 5Q3 2024: 5Q4 2024: 4Q1 2025: 625Q2 2025: 10Q3 2025: 8Q4 2025: 8Q1 2026: 726Q2 2026: 5
  • 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
Their combined reported value
$0$850m$2bnQ4 2016: $45mQ1 2017: $44m17Q2 2017: $163mQ3 2017: $191mQ4 2017: $220mQ1 2018: $249m18Q2 2018: $365mQ3 2018: $388mQ4 2018: $302mQ1 2019: $238m19Q2 2019: $344mQ3 2019: $213mQ4 2019: $303mQ1 2020: $306m20Q2 2020: $636mQ3 2020: $1.4bnQ4 2020: $1.7bnQ1 2021: $663m21Q2 2021: $152mQ3 2021: $44mQ4 2021: $213mQ1 2022: $700m22Q2 2022: $434mQ3 2022: $555mQ4 2022: $521mQ1 2023: $714m23Q2 2023: $608mQ3 2023: $602mQ4 2023: $835mQ1 2024: $851m24Q2 2024: $864mQ3 2024: $475mQ4 2024: $406mQ1 2025: $603m25Q2 2025: $847mQ3 2025: $938mQ4 2025: $895mQ1 2026: $718m26Q2 2026: $516m
  • 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

Largest decreases, by shares

Left it

No manager on file is shown leaving it.

ManagerValue over timeFirst listedLargestQ2 2026
Artisan Partners LPQ1 2020$442m$197m
Millennium Management LLCQ2 2017$190m$167m
Holocene Advisors LPQ3 2019$147m$93m
Capital Research Global InvestorsQ4 2016$289m$40m
Schonfeld Strategic Advisors LLCQ2 2017$18m$18m
T. Rowe Price Associates IncQ2 2020$430mlast listed Q1 2021
AllianceBernstein LPQ3 2017$251mlast listed Q3 2024
Invesco LtdQ3 2020$202mlast listed Q4 2020
Neuberger Berman Group LLCQ2 2020$155mlast listed Q4 2020
Arrowstreet Capital LPQ3 2025$108mlast listed Q1 2026
Janus Henderson Group LtdQ1 2022$75mlast listed Q1 2023
Point72 Asset Management LPQ4 2016$71mlast listed Q1 2026
Balyasny Asset Management LLCQ2 2018$47mlast listed Q4 2023
Man Group PLCQ2 2019$41mlast listed Q3 2025
Two Sigma Investments LPQ2 2021$32mlast 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

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The holdings, every quarter, and the week between

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