$IRTC

$121.93 +$0.66 (0.54%) Close

$IRTC Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 33.0M shares outstanding

Who owns IRTC?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 46.8%

BlackRock, Inc. 9.1% · RTW Investments, LP 6.6%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

303

-3 vs last qtr

Net shares bought

+33.6K

by institutions in Q2 2026

New / sold out

44 / 47

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

RTW Investments, LP +514.1K
Westfield Capital Management Co LP NEW +288.9K

Biggest sellers in Q2 2026

Holocene Advisors, LP −465.0K
Mackenzie Financial Corp SOLD OUT −371.5K

Who is planning to sell?

Notices of proposed sale, last 12 months

$2.82M

7 notices from 4 people

Shares covered

19.8K

0.06% of the company

Arranged in advance

100%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Abhijit Y Talwalkar Director 10b5-1 $2.33M
Mervin Smith Officer 10b5-1 $399K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2019–FY2025

+26.7%

+4.02% a year

Each share's claim on the business

−21.1%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$25M vs $421M

over 7 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years54% 3–5 years16% 1–3 years18% Under 1 year12%

Quarterly turnover

12.5%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting IRTC on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	3.0M	9.06%	+244.2K (+8.9%)	≤2021	0.0%
Shares held by quarter Peak holding3.0M (Q2'26) Change over 8 quarters+426.0K Share of the company9.060% BlackRock, Inc.'s full portfolio →
RI RTW Investments, LP	2.2M	6.62%	+514.1K (+30.8%)	Q4 '25	2.2%
Shares held by quarter Peak holding2.2M (Q2'26) Change over 8 quarters+2.2M Share of the company6.620% RTW Investments, LP's full portfolio →

BlackRock, Inc.

3.0M

% of company

9.06%

Change vs last qtr

+244.2K (+8.9%)

Held since

≤2021

RTW Investments, LP

2.2M

% of company

6.62%

Change vs last qtr

+514.1K (+30.8%)

Held since

Q4 '25

28 more super investors behind a free account

See every manager holding iRhythm Holdings, Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting IRTC on Form N-PORT; together they hold 42.4% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$122M	1.0M	3.11%	0.01%	June 30, 2026
IR iShares Russell 2000 ETF iShares Trust	$102M	860.2K	2.61%	0.12%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$122M

% of company

3.11%

% of the fund

0.01%

As of

June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$102M

% of company

2.61%

% of the fund

0.12%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding iRhythm Holdings, Inc and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
BQ Blackford Quentin S. Insider	226.0K	0.69%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.690% Blackford Quentin S.'s insider activity →
MP Murphy Patrick Michael Insider	69.7K	0.21%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.210% Murphy Patrick Michael's insider activity →

Blackford Quentin S.

Insider

226.0K

% of company

0.69%

Change vs last qtr

—

Held since

—

Murphy Patrick Michael

Insider

69.7K

% of company

0.21%

Change vs last qtr

—

Held since

—

19 more holders behind a free account

See every insider and 5%+ holder of iRhythm Holdings, Inc.

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