Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$4.91M Buy
27,600
+22,500
+441% +$3.53M ﹤0.01% 4367
2025
Q4
$663K Sell
5,100
-5,700
-53% -$816K ﹤0.01% 8328
2025
Q3
$1.59M Buy
10,800
+3,100
+40% +$469K ﹤0.01% 6529
2025
Q2
$1.3M Hold
7,700
﹤0.01% 6544
2025
Q1
$1.28M Sell
7,700
-3,300
-30% -$573K ﹤0.01% 6402
2024
Q4
$1.82M Sell
11,000
-18,800
-63% -$2.97M ﹤0.01% 5834
2024
Q3
$3.97M Buy
29,800
+4,600
+18% +$534K ﹤0.01% 4326
2024
Q2
$3.17M Sell
25,200
-6,500
-21% -$856K ﹤0.01% 4481
2024
Q1
$4.66M Sell
31,700
-199,400
-86% -$25.7M ﹤0.01% 4055
2023
Q4
$27.1M Sell
231,100
-338,100
-59% -$31.5M 0.01% 1715
2023
Q3
$49.9M Buy
569,200
+543,400
+2,106% +$63.2M 0.01% 1078
2023
Q2
$4.25M Sell
25,800
-11,900
-32% -$2.07M ﹤0.01% 3906
2023
Q1
$6.96M Buy
37,700
+12,100
+47% +$2.04M ﹤0.01% 3292
2022
Q4
$3.79M Buy
25,600
+17,100
+201% +$2.35M ﹤0.01% 4345
2022
Q3
$1.2M Sell
8,500
-1,400
-14% -$205K ﹤0.01% 6594
2022
Q2
$1.29M Sell
9,900
-12,000
-55% -$1.61M ﹤0.01% 6440
2022
Q1
$3.19M Buy
21,900
+10,700
+96% +$2.05M ﹤0.01% 5040
2021
Q4
$3.28M Sell
11,200
-4,900
-30% -$1.4M ﹤0.01% 5160
2021
Q3
$4.36M Sell
16,100
-5,700
-26% -$1.55M ﹤0.01% 4577
2021
Q2
$5.29M Buy
21,800
+3,400
+18% +$776K ﹤0.01% 4315
2021
Q1
$4.23M Buy
18,400
+10,500
+133% +$2.64M ﹤0.01% 4649
2020
Q4
$2.12M Sell
7,900
-21,900
-73% -$5.46M ﹤0.01% 5241
2020
Q3
$7.04M Buy
29,800
+3,100
+12% +$695K ﹤0.01% 2695
2020
Q2
$6.09M Buy
26,700
+14,400
+117% +$3.16M ﹤0.01% 2816
2020
Q1
$2.18M Buy
12,300
+3,000
+32% +$515K ﹤0.01% 4005
2019
Q4
$1.47M Sell
9,300
-2,600
-22% -$391K ﹤0.01% 4909
2019
Q3
$1.77M Buy
11,900
+3,600
+43% +$547K ﹤0.01% 4673
2019
Q2
$1.24M Sell
8,300
-11,900
-59% -$1.63M ﹤0.01% 5352
2019
Q1
$2.79M Buy
20,200
+1,600
+9% +$201K ﹤0.01% 3886
2018
Q4
$2M Sell
18,600
-6,600
-26% -$736K ﹤0.01% 4153
2018
Q3
$3.14M Buy
25,200
+14,800
+142% +$1.64M ﹤0.01% 3654
2018
Q2
$1.02M Sell
10,400
-500
-5% -$47.5K ﹤0.01% 5183
2018
Q1
$959K Sell
10,900
-4,900
-31% -$427K ﹤0.01% 4872
2017
Q4
$1.34M Buy
15,800
+3,800
+32% +$330K ﹤0.01% 4210
2017
Q3
$1.04M Sell
12,000
-8,400
-41% -$743K ﹤0.01% 4276
2017
Q2
$1.86M Buy
20,400
+10,000
+96% +$918K ﹤0.01% 3262
2017
Q1
$970K Buy
+10,400
New +$856K ﹤0.01% 4043
2016
Q3
Sell
-7,200
Closed -$378K 7535
2016
Q2
$378K Buy
7,200
+1,200
+20% +$56.5K ﹤0.01% 4880
2016
Q1
$251K Buy
6,000
+3,300
+122% +$124K ﹤0.01% 5325
2015
Q4
$112K Sell
2,700
-7,000
-72% -$286K ﹤0.01% 6563
2015
Q3
$374K Buy
9,700
+600
+7% +$24.5K ﹤0.01% 5234
2015
Q2
$353K Buy
9,100
+5,300
+139% +$190K ﹤0.01% 5509
2015
Q1
$125K Buy
3,800
+2,400
+171% +$69K ﹤0.01% 6656
2014
Q4
$37K Sell
1,400
-1,100
-44% -$27.1K ﹤0.01% 7409
2014
Q3
$53K Buy
2,500
+2,000
+400% +$45.7K ﹤0.01% 6866
2014
Q2
$12K Sell
500
-4,800
-91% -$119K ﹤0.01% 7519
2014
Q1
$145K Buy
5,300
+1,400
+36% +$39.9K ﹤0.01% 5832
2013
Q4
$114K Buy
3,900
+1,900
+95% +$53.2K ﹤0.01% 5505
2013
Q3
$53K Sell
2,000
-900
-31% -$22.2K ﹤0.01% 5763
2013
Q2
$61K Buy
+2,900
New +$61K ﹤0.01% 5557

Other funds holding MASI

Citadel Advisors's MASI Position: Q1 2026 in Review

Citadel Advisors increased its Masimo (MASI) stake by 554% in Q1 2026, buying an estimated $37.4M and bringing the position to 281,366 shares worth $50M. The position accounts for 0.01% of the portfolio, ranked #1359.

Citadel Advisors first reported a position in MASI in Q2 2013 and has held it in 50 quarters since. The position peaked at $198M in Q1 2024. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Citadel Advisors held 281,366 shares of Masimo worth $50M as of Q1 2026.
  • Citadel Advisors bought 238,314 Masimo shares in Q1 2026, an estimated $37.4M.
  • Masimo made up 0.01% of Citadel Advisors's portfolio in Q1 2026, its #1359 holding.
  • Citadel Advisors first reported a position in Masimo in Q2 2013 and has held it in 50 quarters since.
  • Citadel Advisors's Masimo position peaked at $198M in Q1 2024.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.