Company · Ownership research

iRhythm Holdings, Inc. IRTC

CIK 0001388658 · CUSIP 450056106

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 450056106 (IRTC), not CUSIP 450056956 (IRTC), CUSIP 450056906 (IRTC), and does not merge CUSIPs.

This page lists the top 20 of 114 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$97.82M 860,507 shares	0.01%	-21.39K(-2.40%)Reduced	SEC filing ↗ Nov 6, 2026	▾
02	Allspring Global Investments Holdings, LLC CIK 1890906 · View history	$29.97M 269,894 shares	0.05%	-30.16K(-10.10%)Reduced	SEC filing ↗ Nov 4, 2026	▾
03	BARCLAYS PLC CIK 312069 · View history	$28.83M 253,690 shares	0.01%	+61.89K(+32.30%)Added	SEC filing ↗ Nov 6, 2026	▾
04	DEUTSCHE BANK AG\ CIK 948046 · View history	$28.53M 251,008 shares	0.01%	+12.81K(+5.40%)Added	SEC filing ↗ Nov 6, 2026	▾
05	CITIGROUP INC CIK 831001 · View history	$26.94M 237,058 shares	0.01%	-12.35K(-5.00%)Reduced	SEC filing ↗ Nov 4, 2026	▾
06	TimesSquare Capital Management, LLC CIK 1313816 · View history	$16.78M 147,596 shares	0.27%	+10.29K(+7.50%)Added	SEC filing ↗ Nov 3, 2026	▾
07	Bank of New York Mellon Corp CIK 1390777 · View history	$14.30M 125,791 shares	0.00%	+7.02K(+5.90%)Added	SEC filing ↗ Nov 5, 2026	▾
08	M&G PLC CIK 1802539 · View history	$13.90M 121,972 shares	0.07%	+121.97KNew	SEC filing ↗ Nov 4, 2026	▾
09	Russell Investments Group, Ltd. CIK 1692234 · View history	$12.67M 111,451 shares	0.01%	+88.46K(+384.70%)Added	SEC filing ↗ Nov 6, 2026	▾
10	C WorldWide Group Holding A/S CIK 1625244 · View history	$9.09M 80,000 shares	0.23%	0(0.00%)Unchanged	SEC filing ↗ Nov 4, 2026	▾
11	Jefferies Financial Group Inc. CIK 96223 · View history	$6.51M 57,260 shares	0.09%	+57.26KNew	SEC filing ↗ Nov 5, 2026	▾
12	Amundi CIK 1330387 · View history	$6.41M 56,418 shares	0.00%	-116(-0.20%)Reduced	SEC filing ↗ Nov 6, 2026	▾
13	GREAT LAKES ADVISORS, LLC CIK 1078013 · View history	$2.44M 21,461 shares	0.02%	+21.46KNew	SEC filing ↗ Nov 6, 2026	▾
14	Knights of Columbus Asset Advisors LLC CIK 1688666 · View history	$2.40M 21,099 shares	0.12%	+21.10KNew	SEC filing ↗ Nov 5, 2026	▾
15	Kampmann Melissa S. CIK 1999898 · View history	$2.37M 20,872 shares	1.85%	-140(-0.70%)Reduced	SEC filing ↗ Oct 28, 2026	▾
16	Assenagon Asset Management S.A. CIK 1546007 · View history	$2.36M 20,726 shares	0.00%	-1.44K(-6.50%)Reduced	SEC filing ↗ Oct 15, 2026	▾
17	MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC CIK 922127 · View history	$2.25M 19,778 shares	0.02%	-289(-1.40%)Reduced	SEC filing ↗ Oct 23, 2026	▾
18	Creative Planning CIK 1540235 · View history	$2.17M 19,063 shares	0.00%	+9.49K(+99.20%)Added	SEC filing ↗ Nov 2, 2026	▾
19	BANQUE PICTET & CIE SA CIK 1535602 · View history	$2.11M 18,602 shares	0.02%	-3.24K(-14.80%)Reduced	SEC filing ↗ Oct 16, 2026	▾
20	ABN AMRO INVESTMENT SOLUTIONS CIK 2080520 · View history	$1.82M 16,045 shares	0.01%	+4.54K(+39.50%)Added	SEC filing ↗ Oct 21, 2026	▾

Showing 20 / 114 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

114

Cancelled or null records excluded

Disclosed shares

2,943,016

Not deduplicated across managers

Disclosed value

$333.85M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

iRhythm Holdings, Inc. · Q3 2026

Explore all 114 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.