MASSACHUSETTS FINANCIAL SERVICES CO /MA/

Position in IRTC — iRhythm Holdings, Inc.

CIK 912938 Boston, MA

Position in IRTC

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$19,666,497

-$6,999,895 QoQ

Shares Held

166,637

+10.9% QoQ

Ownership

0.507%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

7 quarters on record

Voting authority Sole 98.47692889334301.ToString("F0")% Shared 1.5230711066569849.ToString("F0")% None 0.ToString("F0")%

Healthcare · as of Mar 31, 2026

MASSACHUSETTS FINANCIAL SERVICES CO /MA/ holds $6,029,179,529 across 17 Medical Devices names. IRTC ranks #14 (0.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MDT	Medtronic plc	21,437,599	$1,857,567,950
2	ABT	Abbott Laboratories	15,499,870	$1,591,371,647
3	STE	STERIS plc	4,010,349	$886,808,469
4	BSX	Boston Scientific Corp	10,996,572	$690,034,889
5	MASI	Masimo Corp	2,342,790	$416,712,054
6	DXCM	Dexcom Inc	1,934,452	$121,483,582
7	BIO	Bio-Rad Laboratories, Inc.	396,150	$110,426,810
8	GEHC	GE HealthCare Technologies Inc.	1,260,998	$89,757,836

7 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$19,666,497	166,637	+10.9%	Shares	Sole	2026-05-14
2025-12-31	$26,666,392	150,284	-6.4%	Shares	Sole	2026-01-22
2025-09-30	$27,612,994	160,550	+27.0%	Shares	Sole	2025-10-29
2025-06-30	$19,469,011	126,455	+12.8%	Shares	Sole	2025-08-08
2020-09-30	$26,693,083	112,104	-43.1%	Shares	Sole	2020-11-12
2020-06-30	$22,833,343	197,026	-2.4%	Shares	Sole	2020-11-20
2020-03-31	$16,417,568	201,814	—	Shares	Sole	2020-11-20
No filing history on record for this holder in this stock.