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IRTC in the 13F filings

Irhythm Technologies Inc · CUSIP 450056106

Sector · Medical devices and instrumentsTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Surgical, medical and electromedical devices
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
29
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 7 listed it in both
Shares listed
7,971,479
combined, among listed positions
Reported value
$948m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 13 buyers (opened or added shares) and 17 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,408,690.

Managers listing IRTC in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

29 of 29 holders

ActionFiling
Artisan Partners LP1,660,307$197m0.31%Added+209,40013 Aug 2026 (the filing on sec.gov)
Millennium Management LLC1,406,454$167m0.06%Trimmed-201,56014 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)1,191,982$142munder 0.1%Trimmed-169,93713 Aug 2026 (the filing on sec.gov)
Holocene Advisors LP783,636$93m0.21%Trimmed-465,02214 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.629,686$75munder 0.1%Added+75,42014 Aug 2026 (the filing on sec.gov)
Arrowstreet Capital LP450,865$54munder 0.1%Trimmed-132,01413 Aug 2026 (the filing on sec.gov)
Capital Research Global Investors335,209$40munder 0.1%Trimmed-174,38112 Aug 2026 (the filing on sec.gov)
Jane Street Group LLC275,262$33munder 0.1%Added+162,39814 Aug 2026 (the filing on sec.gov)
Point72 Asset Management LP273,162$32munder 0.1%Trimmed-326,24314 Aug 2026 (the filing on sec.gov)
MFS Investment Management165,998$20munder 0.1%Trimmed-6393 Aug 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC152,062$18m0.06%Added+63,92914 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC95,931$11munder 0.1%Trimmed-17,6692 Sep 2026 (the filing on sec.gov)
Wellington Management Group LLP88,257$10munder 0.1%Trimmed-2,20314 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC71,862$8.5munder 0.1%Added+65,69814 Aug 2026 (the filing on sec.gov)
Neuberger Berman Group LLC63,343$7.5munder 0.1%Added+61,50327 Oct 2026 (the filing on sec.gov)
Verition Fund Management LLC55,987$6.7munder 0.1%Added+21,42214 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc44,239$5.3munder 0.1%Added+8,55214 Aug 2026 (the filing on sec.gov)
Man Group PLC43,362$5.2munder 0.1%Trimmed-44,84814 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP42,595$5.0munder 0.1%Added+6,29614 Aug 2026 (the filing on sec.gov)
Renaissance Technologies LLC38,500$4.6munder 0.1%Trimmed-15,30013 Aug 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP23,847$2.8munder 0.1%Added+7,06014 Aug 2026 (the filing on sec.gov)
Invesco Ltd22,146$2.6munder 0.1%Trimmed-275,30614 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP18,015$2.1munder 0.1%Trimmed-6,13614 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC17,681$2.1munder 0.1%Trimmed-16,90914 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd13,856$1.6munder 0.1%Held014 Aug 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (3)

Exited (2)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
5 in Q3 2024 to 5 in Q2 2026

Tracked managers listing it, at least.

0510152017201820192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
IRTC by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20162$45mn.a.n.a.
Q1 20171$44mn.a.n.a.
Q2 20174$163mn.a.n.a.
Q3 20174$191mn.a.n.a.
Q4 20174$220mn.a.n.a.
Q1 20185$249mn.a.n.a.
Q2 20185$365mn.a.n.a.
Q3 20187$388mn.a.n.a.
Q4 20188$302mn.a.n.a.
Q1 20196$238mn.a.n.a.
Q2 20198$344mn.a.n.a.
Q3 20196$213mn.a.n.a.
Q4 20197$303mn.a.n.a.
Q1 20206$306mn.a.n.a.
Q2 20207$636mn.a.n.a.
Q3 202010$1.4bnn.a.n.a.
Q4 202011$1.7bnn.a.n.a.
Q1 202110$663mn.a.n.a.
Q2 20218$152mn.a.n.a.
Q3 20215$44mn.a.n.a.
Q4 20215$213mn.a.n.a.
Q1 20229$700mn.a.n.a.
Q2 20229$434mn.a.n.a.
Q3 20227$555mn.a.n.a.
Q4 20227$521mn.a.n.a.
Q1 202310$714mn.a.n.a.
Q2 20238$608mn.a.n.a.
Q3 20235$602mn.a.n.a.
Q4 20239$835m81
Q1 20247$851m34
Q2 20245$864m42
Q3 20245$475m14
Q4 20244$406m03
Q1 20256$603m60
Q2 202510$847m64
Q3 20258$938m53
Q4 20258$895m2112
Q1 20267$718m1419
Q2 20265$516m1317

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

IRTC and LLY →IRTC and JNJ →IRTC and VRTX →Choose a stock to compare with IRTC →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own IRTC, latest filings →Back to the 13F Explorer →