How many institutions held IRTC - iRhythm Holdings, Inc. - Common Stock, par value $0.001 per share in Q4 2023?

222 institutional investors reported IRTC - iRhythm Holdings, Inc. - Common Stock, par value $0.001 per share for Q4 2023. Use the holders table for investor-level position and value details.

iRhythm Holdings, Inc. - Common Stock, par value $0.001 per share (IRTC)

Q: What does CUSIP 450056106 represent in this 13F holders report?

CUSIP 450056106 is the security identifier for IRTC - iRhythm Holdings, Inc. - Common Stock, par value $0.001 per share used to aggregate holder disclosures.

CUSIP: 450056106

Q4 2023 13F Holders as of 31 Dec 2023

Security type / class: Equity / Common Stock, par value $0.001 per share
Total 13F shares: 32,945,986
Total 13F value: $3,526,898,502
Share change: -287,248
Put/Call ratio: 95%
SEC-reported price per share: $107.04
Number of holders: 222
Value change: -$20,629,057
Number of buys: 114
Number of sells: 102
Shares outstanding: 31,735,182

Security key

450056106

Report period

Q4 2023

Institutions

222

Top holders

IRTC full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 iRhythm Holdings, Inc. SEC filings iRhythm Holdings, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 450056106

Newer quarter: Q3 2026

Recent filing periods:

Q3 2026

Ownership snapshot

Top reported holders of IRTC - iRhythm Holdings, Inc. - Common Stock, par value $0.001 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

VANGUARD GROUP INC

Disclosed value leader

VANGUARD GROUP INC

Comparable rows

0/15

Latest evidence

30 Sep 2023

13F Highest disclosed value: $278,797,421 15 rows are not safely comparable across share classes. Showing 1-6 of 15 holder rows.

Quick read

VANGUARD GROUP INC has the largest disclosed position value at $278.8M.

0 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens VANGUARD GROUP INC's linked filing trail.

Disclosed position value Top 5

VANGUARD GROUP INC $278.8M

Capital Research Global Investors $223.77M

SANDS CAPITAL MANAGEMENT, LLC $221.48M

BlackRock Finance, Inc. $219.84M

Artisan Partners Limited Partnership $185M

Value bars compare disclosed positions; verify each figure against the linked filing evidence.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
VANGUARD GROUP INC	13F Company 13F	— denominator unverified	$278,797,421 2,957,749 shares	—	30 Sep 2023
Capital Research Global Investors	13F Company 13F	— denominator unverified	$223,765,416 2,373,917 shares	—	30 Sep 2023
SANDS CAPITAL MANAGEMENT, LLC	13F Company 13F	— denominator unverified	$221,484,607 2,349,720 shares	—	30 Sep 2023
BlackRock Finance, Inc.	13F Company 13F	— denominator unverified	$219,840,053 2,332,273 shares	—	30 Sep 2023
Artisan Partners Limited Partnership	13F Company 13F	— denominator unverified	$184,997,033 1,962,625 shares	—	30 Sep 2023
ALLIANCEBERNSTEIN L.P.	13F Company 13F	— denominator unverified	$129,685,642 1,375,829 shares	—	30 Sep 2023

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q4 2023

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

222

32,945,986

Rows available

222

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q4 2023 vs Q3 2023 Across Filers

Q3 2023 holders

223

Q4 2023 holders

222

Holder diff

-1

Investor	Q3 2023 Shares	Q4 2023 Shares	Share Diff	Share Chg %	Q3 2023 value	Q4 2023 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend