Morgan Stanley
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Morgan Stanley’s iRhythm Holdings IRTC Stock Holding History

Morgan Stanley’s Portfolio IRTC Stock Details IRTC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$28.1M Buy
237,799
+67,808
+40% +$9.79M ﹤0.01% 2630
2025
Q4 		$30.2M Buy
169,991
+15,120
+10% +$2.68M ﹤0.01% 2557
2025
Q3 		$26.6M Sell
154,871
-23,027
-13% -$3.66M ﹤0.01% 2608
2025
Q2 		$27.4M Sell
177,898
-54,771
-24% -$7.08M ﹤0.01% 2494
2025
Q1 		$24.4M Sell
232,669
-19,095
-8% -$2.02M ﹤0.01% 2493
2024
Q4 		$22.7M Sell
251,764
-56,859
-18% -$4.47M ﹤0.01% 2625
2024
Q3 		$22.9M Sell
308,623
-45,883
-13% -$3.65M ﹤0.01% 2670
2024
Q2 		$38.2M Buy
354,506
+169,409
+92% +$17.3M ﹤0.01% 2005
2024
Q1 		$21.5M Sell
185,097
-390,391
-68% -$43.9M ﹤0.01% 2617
2023
Q4 		$61.6M Buy
575,488
+414,547
+258% +$36.1M ﹤0.01% 2225
2023
Q3 		$15.2M Buy
160,941
+8,307
+5% +$845K ﹤0.01% 2739
2023
Q2 		$15.9M Sell
152,634
-58,296
-28% -$7M ﹤0.01% 2709
2023
Q1 		$26.2M Buy
210,930
+59,484
+39% +$6.45M ﹤0.01% 2142
2022
Q4 		$14.2M Buy
151,446
+63,496
+72% +$6.91M ﹤0.01% 2702
2022
Q3 		$11M Sell
87,950
-181,837
-67% -$26.3M ﹤0.01% 2857
2022
Q2 		$29.1M Buy
269,787
+166,646
+162% +$22.1M ﹤0.01% 1873
2022
Q1 		$16.2M Buy
103,141
+25,545
+33% +$3.28M ﹤0.01% 2348
2021
Q4 		$9.13M Sell
77,596
-113,082
-59% -$10.4M ﹤0.01% 3040
2021
Q3 		$11.2M Sell
190,678
-32,160
-14% -$1.7M ﹤0.01% 2761
2021
Q2 		$14.8M Buy
222,838
+105,154
+89% +$8.33M ﹤0.01% 2519
2021
Q1 		$16.3M Buy
117,684
+33,329
+40% +$5.97M ﹤0.01% 2135
2020
Q4 		$20M Buy
84,355
+21,702
+35% +$4.95M ﹤0.01% 1808
2020
Q3 		$14.9M Sell
62,653
-317,924
-84% -$56.2M ﹤0.01% 1690
2020
Q2 		$44.1M Buy
380,577
+88,239
+30% +$9.73M 0.01% 898
2020
Q1 		$23.8M Buy
292,338
+81,895
+39% +$6.79M 0.01% 1165
2019
Q4 		$14.3M Sell
210,443
-66,644
-24% -$4.52M ﹤0.01% 1997
2019
Q3 		$20.5M Buy
277,087
+199,655
+258% +$15.5M 0.01% 1470
2019
Q2 		$6.12M Sell
77,432
-140,542
-64% -$10.2M ﹤0.01% 2706
2019
Q1 		$16.3M Buy
217,974
+148,109
+212% +$12.7M ﹤0.01% 1601
2018
Q4 		$4.85M Sell
69,865
-223,646
-76% -$17M ﹤0.01% 2940
2018
Q3 		$27.8M Buy
293,511
+65,801
+29% +$5.73M 0.01% 1388
2018
Q2 		$18.5M Buy
227,710
+170,649
+299% +$11.9M 0.01% 1713
2018
Q1 		$3.59M Sell
57,061
-3,626
-6% -$224K ﹤0.01% 3408
2017
Q4 		$3.4M Buy
60,687
+30,409
+100% +$1.59M ﹤0.01% 3509
2017
Q3 		$1.57M Sell
30,278
-32,689
-52% -$1.48M ﹤0.01% 4092
2017
Q2 		$2.67M Buy
62,967
+47,017
+295% +$1.71M ﹤0.01% 3522
2017
Q1 		$600K Sell
15,950
-7,329
-31% -$252K ﹤0.01% 4727
2016
Q4 		$698K Buy
+23,279
New +$627K ﹤0.01% 4714

Other funds holding IRTC

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
RI
RTW Investments New York $10B AUM 135.35% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Holocene Advisors
Holocene Advisors New York $41.5B AUM 42.97% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $481B AUM 26.39% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Morgan Stanley's IRTC Position: Q1 2026 in Review

Morgan Stanley increased its iRhythm Holdings (IRTC) stake by 40% in Q1 2026, buying an estimated $9.79M and bringing the position to 237,799 shares worth $28.1M. The position accounts for ﹤0.01% of the portfolio, ranked #2630.

Morgan Stanley first reported a position in IRTC in Q4 2016 and has held it in 38 quarters since. The position peaked at $61.6M in Q4 2023. 304 funds tracked by Wall St. Rank hold IRTC as of Q1 2026.

  • Morgan Stanley held 237,799 shares of iRhythm Holdings worth $28.1M as of Q1 2026.
  • Morgan Stanley bought 67,808 iRhythm Holdings shares in Q1 2026, an estimated $9.79M.
  • iRhythm Holdings made up ﹤0.01% of Morgan Stanley's portfolio in Q1 2026, its #2630 holding.
  • Morgan Stanley first reported a position in iRhythm Holdings in Q4 2016 and has held it in 38 quarters since.
  • Morgan Stanley's iRhythm Holdings position peaked at $61.6M in Q4 2023.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q1 2026.

Based on Morgan Stanley's 13F filing for Q1 2026, filed 15 May 2026.