Group One Trading
MASI

Group One Trading’s Masimo MASI Stock Holding History

Group One Trading’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
Q1 		– Sell
-75
Closed -$13K – 8050
2024
Q4 		$12.4K Buy
+75
New +$11.8K ﹤0.01% 5985
2024
Q1 		– Sell
-7,021
Closed -$907K – 7583
2023
Q4 		$823K Buy
7,021
+3,381
+93% +$315K ﹤0.01% 2647
2023
Q3 		$319K Buy
3,640
+3,154
+649% +$367K ﹤0.01% 3373
2023
Q2 		$80K Buy
+486
New +$84.6K ﹤0.01% 4843
2022
Q1 		– Sell
-300
Closed -$88K – 8403
2021
Q4 		$88K Sell
300
-22,057
-99% -$6.28M ﹤0.01% 5845
2021
Q3 		$6.05M Buy
+22,357
New +$6.06M 0.01% 1503
2021
Q2 		– Sell
-329
Closed -$75.1K – 8377
2021
Q1 		$76K Buy
+329
New +$82.6K ﹤0.01% 5894
2020
Q4 		– Sell
-300
Closed -$74.8K – 6783
2020
Q3 		$71K Buy
+300
New +$67.3K ﹤0.01% 4413
2020
Q2 		– Sell
-2,900
Closed -$514K – 6007
2020
Q1 		$514K Buy
+2,900
New +$497K ﹤0.01% 2033
2018
Q3 		– Sell
-628
Closed -$61K – 5431
2018
Q2 		$61K Buy
+628
New +$59.7K ﹤0.01% 3851
2018
Q1 		– Sell
-646
Closed -$55K – 5103
2017
Q4 		$55K Sell
646
-3,700
-85% -$321K ﹤0.01% 3679
2017
Q3 		$376K Sell
4,346
-843
-16% -$74.5K ﹤0.01% 2303
2017
Q2 		$473K Buy
+5,189
New +$476K ﹤0.01% 2004
2014
Q4 		– Sell
-1,100
Closed -$23K – 5109
2014
Q3 		$23K Buy
+1,100
New +$25.1K ﹤0.01% 4032
2014
Q2 		– Sell
-1,041
Closed -$25.8K – 5350
2014
Q1 		$28K Buy
+1,041
New +$29.7K ﹤0.01% 4024

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 $315B AUM 27.84% 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

Group One Trading's MASI Position: Q1 2025 in Review

Group One Trading sold out of Masimo (MASI) in Q1 2025, closing a stake of 75 shares — an estimated $13K sold.

Group One Trading first reported a position in MASI in Q1 2014 and held it in 15 quarters. The position peaked at $6.05M in Q3 2021. 394 funds tracked by Wall St. Rank hold MASI as of Q1 2025.

  • Group One Trading reported no remaining Masimo position as of Q1 2025 after selling out during the quarter.
  • Group One Trading sold 75 Masimo shares in Q1 2025, an estimated $13K.
  • Group One Trading first reported a position in Masimo in Q1 2014 and held it in 15 quarters.
  • Group One Trading's Masimo position peaked at $6.05M in Q3 2021.
  • 394 funds tracked by Wall St. Rank held Masimo as of Q1 2025.

Based on Group One Trading's 13F filing for Q1 2025, filed 14 May 2025.