MASSACHUSETTS FINANCIAL SERVICES CO /MA/
Position in IRTC — iRhythm Holdings, Inc.
CIK 912938
Boston, MA
Position in IRTC
as of Jun 30, 2026
· filed Aug 3, 2026
Position Value
$19,745,461
+$78,964 QoQ
Shares Held
165,998
-0.4% QoQ
Ownership
0.504%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#49
of 304 holders
Holding Since
Mar 2020
8 quarters on record
Voting authority
Sole 99%
Shared 1%
None 0%
Common Shares in IRTC Over Time
Shares Held
Position Value (USD)
Position in Medical Devices
Healthcare · as of Jun 30, 2026MASSACHUSETTS FINANCIAL SERVICES CO /MA/ holds $5,155,670,910 across 15 Medical Devices names. IRTC ranks #10 (0.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MDT |
Medtronic plc
|
19,872,600 | $1,554,633,495 | |
| 2 | ABT |
Abbott Laboratories
|
13,359,956 | $1,212,282,403 | |
| 3 | BSX |
Boston Scientific Corp
|
24,859,191 | $1,060,990,269 | |
| 4 | STE |
STERIS plc
|
3,801,077 | $800,392,779 | |
| 5 | DXCM |
Dexcom Inc
|
3,560,621 | $239,807,820 | |
| 6 | ITGR |
Integer Holdings Corp
|
788,214 | $73,658,598 | |
| 7 | SYK |
Stryker Corp
|
195,835 | $61,656,688 | |
| 8 | UFPT |
Ufp Technologies Inc
|
223,474 | $59,249,661 |
All Filings in IRTC
Export CSV
8 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $19,745,461 | 165,998 | Shares | Sole | 2026-08-03 | |
| 2026-03-31 | $19,666,497 | 166,637 | Shares | Sole | 2026-05-14 | |
| 2025-12-31 | $26,666,392 | 150,284 | Shares | Sole | 2026-01-22 | |
| 2025-09-30 | $27,612,994 | 160,550 | Shares | Sole | 2025-10-29 | |
| 2025-06-30 | $19,469,011 | 126,455 | Shares | Sole | 2025-08-08 | |
| 2020-09-30 | $26,693,083 | 112,104 | Shares | Sole | 2020-11-12 | |
| 2020-06-30 | $22,833,343 | 197,026 | 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. | ||||||