Two Sigma Investments
MASI

Two Sigma Investments’s Masimo MASI Stock Holding History

Two Sigma Investments’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
2025
Q3 		– Sell
-15,465
Closed -$2.6M – 3812
2025
Q2 		$2.6M Sell
15,465
-9,700
-39% -$1.55M ﹤0.01% 1649
2025
Q1 		$4.19M Sell
25,165
-14,724
-37% -$2.55M 0.01% 1231
2024
Q4 		$6.59M Sell
39,889
-302,938
-88% -$47.8M 0.01% 949
2024
Q3 		$45.7M Buy
342,827
+91,871
+37% +$10.7M 0.1% 250
2024
Q2 		$31.6M Buy
+250,956
New +$33M 0.07% 321
2023
Q4 		– Sell
-8,587
Closed -$753K – 3278
2023
Q3 		$753K Sell
8,587
-16,773
-66% -$1.95M ﹤0.01% 2087
2023
Q2 		$4.17M Buy
25,360
+13,500
+114% +$2.35M 0.01% 1010
2023
Q1 		$2.19M Sell
11,860
-55,948
-83% -$9.44M 0.01% 1333
2022
Q4 		$10M Buy
67,808
+4,948
+8% +$681K 0.03% 556
2022
Q3 		$8.87M Sell
62,860
-121,135
-66% -$17.7M 0.03% 528
2022
Q2 		$24M Sell
183,995
-411,323
-69% -$55M 0.08% 285
2022
Q1 		$86.6M Buy
595,318
+481,999
+425% +$92.5M 0.26% 97
2021
Q4 		$33.2M Buy
113,319
+66,747
+143% +$19M 0.07% 323
2021
Q3 		$12.6M Buy
46,572
+39,612
+569% +$10.7M 0.03% 660
2021
Q2 		$1.69M Sell
6,960
-54,776
-89% -$12.5M ﹤0.01% 2012
2021
Q1 		$14.2M Buy
+61,736
New +$15.5M 0.04% 566
2020
Q3 		– Sell
-21,123
Closed -$4.74M – 3372
2020
Q2 		$4.82M Buy
21,123
+18,576
+729% +$4.08M 0.02% 656
2020
Q1 		$451K Sell
2,547
-11,892
-82% -$2.04M ﹤0.01% 2014
2019
Q4 		$2.28M Buy
14,439
+5,696
+65% +$856K 0.01% 1479
2019
Q3 		$1.3M Sell
8,743
-74,583
-90% -$11.3M ﹤0.01% 1763
2019
Q2 		$12.4M Sell
83,326
-158,081
-65% -$21.7M 0.04% 505
2019
Q1 		$33.4M Buy
241,407
+85,162
+55% +$10.7M 0.11% 240
2018
Q4 		$16.8M Sell
156,245
-122,096
-44% -$13.6M 0.07% 372
2018
Q3 		$34.7M Sell
278,341
-67,726
-20% -$7.51M 0.09% 278
2018
Q2 		$33.8M Buy
346,067
+211,660
+157% +$20.1M 0.1% 269
2018
Q1 		$11.8M Buy
+134,407
New +$11.7M 0.04% 521
2017
Q4 		– Sell
-60,240
Closed -$5.21M – 3308
2017
Q3 		$5.21M Sell
60,240
-195,977
-76% -$17.3M 0.02% 782
2017
Q2 		$23.4M Sell
256,217
-441,327
-63% -$40.5M 0.08% 288
2017
Q1 		$65.1M Buy
697,544
+557,652
+399% +$45.9M 0.22% 108
2016
Q4 		$9.43M Sell
139,892
-57,331
-29% -$3.52M 0.04% 556
2016
Q3 		$11.7M Sell
197,223
-59,536
-23% -$3.36M 0.04% 478
2016
Q2 		$13.5M Buy
256,759
+182,082
+244% +$8.58M 0.06% 388
2016
Q1 		$3.12M Buy
74,677
+69,609
+1,374% +$2.62M 0.01% 923
2015
Q4 		$210K Sell
5,068
-3,849
-43% -$157K ﹤0.01% 2443
2015
Q3 		$344K Buy
+8,917
New +$364K ﹤0.01% 1724
2015
Q2 		– Sell
-10,390
Closed -$343K – 2969
2015
Q1 		$343K Sell
10,390
-199,450
-95% -$5.73M ﹤0.01% 2193
2014
Q4 		$5.53M Buy
209,840
+76,626
+58% +$1.89M 0.03% 615
2014
Q3 		$2.83M Sell
133,214
-144,288
-52% -$3.29M 0.01% 776
2014
Q2 		$6.55M Buy
+277,502
New +$6.88M 0.03% 621

Other funds holding MASI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
PCM
Politan Capital Management New York $985M AUM 3.12% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $23.8B AUM 49.45% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return

Two Sigma Investments's MASI Position: Q3 2025 in Review

Two Sigma Investments sold out of Masimo (MASI) in Q3 2025, closing a stake of 15,465 shares — an estimated $2.6M sold.

Two Sigma Investments first reported a position in MASI in Q2 2014 and held it in 39 quarters. The position peaked at $86.6M in Q1 2022. 358 funds tracked by Wall St. Rank hold MASI as of Q3 2025.

  • Two Sigma Investments reported no remaining Masimo position as of Q3 2025 after selling out during the quarter.
  • Two Sigma Investments sold 15,465 Masimo shares in Q3 2025, an estimated $2.6M.
  • Two Sigma Investments first reported a position in Masimo in Q2 2014 and held it in 39 quarters.
  • Two Sigma Investments's Masimo position peaked at $86.6M in Q1 2022.
  • 358 funds tracked by Wall St. Rank held Masimo as of Q3 2025.

Based on Two Sigma Investments's 13F filing for Q3 2025, filed 14 Nov 2025.