Twin Tree Management
MASI

Twin Tree Management’s Masimo MASI Stock Holding History

Twin Tree 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
2025
Q2 		– Sell
-175
Closed -$29.2K – 1799
2025
Q1 		$29.2K Buy
+175
New +$30.4K ﹤0.01% 1459
2024
Q4 		– Sell
-94,416
Closed -$12.6M – 1776
2024
Q3 		$12.6M Buy
+94,416
New +$11M 0.02% 572
2024
Q1 		– Sell
-112,419
Closed -$14.5M – 1467
2023
Q4 		$13.2M Buy
+112,419
New +$10.5M 0.03% 606
2023
Q3 		– Sell
-1,721
Closed -$283K – 1396
2023
Q2 		$283K Sell
1,721
-1,866
-52% -$325K ﹤0.01% 1095
2023
Q1 		$662K Buy
3,587
+2,387
+199% +$403K ﹤0.01% 1054
2022
Q4 		$178K Buy
+1,200
New +$165K ﹤0.01% 1156
2022
Q2 		– Sell
-22,343
Closed -$3.25M – 1719
2022
Q1 		$3.25M Buy
+22,343
New +$4.29M 0.01% 1047
2021
Q4 		– Sell
-60
Closed -$16K – 1739
2021
Q3 		$16K Buy
60
+21
+54% +$5.69K ﹤0.01% 1496
2021
Q2 		$9K Buy
+39
New +$8.9K ﹤0.01% 1269
2020
Q4 		– Sell
-3,586
Closed -$847K – 1401
2020
Q3 		$847K Sell
3,586
-28,404
-89% -$6.37M ﹤0.01% 916
2020
Q2 		$7.29M Buy
+31,990
New +$7.02M 0.03% 544
2020
Q1 		– Sell
-1,799
Closed -$284K – 1521
2019
Q4 		$284K Sell
1,799
-139
-7% -$20.9K ﹤0.01% 996
2019
Q3 		$288K Sell
1,938
-11,957
-86% -$1.82M ﹤0.01% 955
2019
Q2 		$2.07M Buy
13,895
+1,816
+15% +$249K 0.01% 653
2019
Q1 		$1.67M Buy
+12,079
New +$1.52M 0.01% 716
2018
Q4 		– Sell
-550
Closed -$68K – 1443
2018
Q3 		$68K Buy
+550
New +$61K ﹤0.01% 977
2017
Q3 		– Sell
-502
Closed -$46K – 1088
2017
Q2 		$46K Buy
+502
New +$46.1K ﹤0.01% 879

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
PCM
Politan Capital Management New York $985M AUM 3.12% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 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
Holocene Advisors
Holocene Advisors New York $41.5B AUM 42.97% 1-Year Est. Return
Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $23.8B AUM 49.45% 1-Year Est. Return

Twin Tree Management's MASI Position: Q2 2025 in Review

Twin Tree Management sold out of Masimo (MASI) in Q2 2025, closing a stake of 175 shares — an estimated $29.2K sold.

Twin Tree Management first reported a position in MASI in Q2 2017 and held it in 17 quarters. The position peaked at $13.2M in Q4 2023. 378 funds tracked by Wall St. Rank hold MASI as of Q2 2025.

  • Twin Tree Management reported no remaining Masimo position as of Q2 2025 after selling out during the quarter.
  • Twin Tree Management sold 175 Masimo shares in Q2 2025, an estimated $29.2K.
  • Twin Tree Management first reported a position in Masimo in Q2 2017 and held it in 17 quarters.
  • Twin Tree Management's Masimo position peaked at $13.2M in Q4 2023.
  • 378 funds tracked by Wall St. Rank held Masimo as of Q2 2025.

Based on Twin Tree Management's 13F filing for Q2 2025, filed 28 Jul 2025.