AQR Capital Management
MASI

AQR Capital Management’s Masimo MASI Stock Holding History

AQR Capital Management’s Portfolio MASI Stock Details MASI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$147M Sell
831,966
-259,360
-24% -$40.7M 0.07% 398
2025
Q4 		$142M Buy
1,091,326
+1,060,292
+3,417% +$152M 0.07% 359
2025
Q3 		$4.44M Sell
31,034
-19,222
-38% -$2.91M ﹤0.01% 1525
2025
Q2 		$8.45M Buy
50,256
+42,114
+517% +$6.73M 0.01% 1036
2025
Q1 		$1.3M Buy
8,142
+4,700
+137% +$816K ﹤0.01% 1855
2024
Q4 		$569K Sell
3,442
-12,774
-79% -$2.02M ﹤0.01% 2182
2024
Q3 		$2.16M Buy
+16,216
New +$1.88M ﹤0.01% 1467
2023
Q3 		– Sell
-5,103
Closed -$840K – 2351
2023
Q2 		$840K Sell
5,103
-8,498
-62% -$1.48M ﹤0.01% 1627
2023
Q1 		$2.46M Buy
+13,601
New +$2.29M 0.01% 1168
2022
Q4 		– Sell
-4,009
Closed -$566K – 2244
2022
Q3 		$566K Sell
4,009
-387,733
-99% -$56.6M ﹤0.01% 1732
2022
Q2 		$51.2M Buy
391,742
+186,366
+91% +$24.9M 0.12% 220
2022
Q1 		$29.9M Buy
205,376
+154,063
+300% +$29.6M 0.06% 403
2021
Q4 		$15M Sell
51,313
-405
-0.8% -$115K 0.03% 578
2021
Q3 		$14M Sell
51,718
-394
-0.8% -$107K 0.03% 578
2021
Q2 		$12.6M Buy
52,112
+554
+1% +$126K 0.02% 636
2021
Q1 		$11.7M Sell
51,558
-1,246
-2% -$313K 0.02% 644
2020
Q4 		$14M Sell
52,804
-2,511
-5% -$626K 0.02% 531
2020
Q3 		$12.8M Sell
55,315
-57,998
-51% -$13M 0.02% 583
2020
Q2 		$25.2M Sell
113,313
-114,983
-50% -$25.2M 0.04% 437
2020
Q1 		$40.4M Sell
228,296
-152,548
-40% -$26.2M 0.07% 320
2019
Q4 		$60.2M Sell
380,844
-138,556
-27% -$20.8M 0.07% 349
2019
Q3 		$76.9M Sell
519,400
-398,108
-43% -$60.5M 0.09% 273
2019
Q2 		$133M Buy
917,508
+83,039
+10% +$11.4M 0.15% 181
2019
Q1 		$114M Buy
834,469
+255,499
+44% +$32.1M 0.12% 202
2018
Q4 		$62.2M Buy
578,970
+159,937
+38% +$17.8M 0.07% 294
2018
Q3 		$52.2M Buy
419,033
+278,630
+198% +$30.9M 0.05% 369
2018
Q2 		$13.7M Sell
140,403
-58,391
-29% -$5.55M 0.01% 689
2018
Q1 		$17.5M Sell
198,794
-82,953
-29% -$7.23M 0.02% 624
2017
Q4 		$23.9M Buy
281,747
+23,011
+9% +$2M 0.03% 564
2017
Q3 		$22.4M Buy
258,736
+86,884
+51% +$7.68M 0.03% 561
2017
Q2 		$15.7M Buy
171,852
+34,157
+25% +$3.14M 0.02% 658
2017
Q1 		$12.8M Buy
137,695
+462
+0.3% +$38K 0.02% 708
2016
Q4 		$9.25M Buy
137,233
+3,352
+3% +$206K 0.01% 792
2016
Q3 		$7.96M Buy
133,881
+24,184
+22% +$1.36M 0.01% 843
2016
Q2 		$5.76M Buy
109,697
+18,722
+21% +$882K 0.01% 862
2016
Q1 		$3.81M Buy
90,975
+30,436
+50% +$1.14M 0.01% 975
2015
Q4 		$2.51M Buy
60,539
+19,050
+46% +$778K ﹤0.01% 1147
2015
Q3 		$1.6M Buy
41,489
+14,942
+56% +$611K ﹤0.01% 1233
2015
Q2 		$1.03M Buy
26,547
+10,247
+63% +$367K ﹤0.01% 1478
2015
Q1 		$538K Sell
16,300
-1,700
-9% -$48.9K ﹤0.01% 1673
2014
Q4 		$474K Buy
+18,000
New +$444K ﹤0.01% 1995

Other funds holding MASI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
PCM
Politan Capital Management New York $985M AUM 3.12% 1-Year Est. Return
PCM
Pentwater Capital Management Naples, Florida $19.3B AUM 58.13% 1-Year Est. Return
Barclays
Barclays London, United Kingdom $416B AUM 33.63% 1-Year Est. Return
HI
HBK Investments Dallas, Texas $9.85B AUM 55.6% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

AQR Capital Management's MASI Position: Q1 2026 in Review

AQR Capital Management reduced its Masimo (MASI) stake by 24% in Q1 2026, selling an estimated $40.7M and leaving 831,966 shares worth $147M. The position accounts for 0.07% of the portfolio, ranked #398.

AQR Capital Management first reported a position in MASI in Q4 2014 and has held it in 41 quarters since. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • AQR Capital Management held 831,966 shares of Masimo worth $147M as of Q1 2026.
  • AQR Capital Management sold 259,360 Masimo shares in Q1 2026, an estimated $40.7M.
  • Masimo made up 0.07% of AQR Capital Management's portfolio in Q1 2026, its #398 holding.
  • AQR Capital Management first reported a position in Masimo in Q4 2014 and has held it in 41 quarters since.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on AQR Capital Management's 13F filing for Q1 2026, filed 15 May 2026.