Walleye Trading
MASI

Walleye Trading’s Masimo MASI Stock Holding History

Walleye 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
2026
Q2 		– Sell
-362,600
Closed -$64.5M – 4274
2026
Q1 		$64.5M Buy
+362,600
New +$56.9M 0.11% 193
2024
Q2 		– Sell
-1,800
Closed -$264K – 4655
2024
Q1 		$264K Sell
1,800
-2,300
-56% -$297K ﹤0.01% 3265
2023
Q4 		$481K Buy
4,100
+2,200
+116% +$205K ﹤0.01% 3108
2023
Q3 		$167K Buy
+1,900
New +$221K ﹤0.01% 3723
2023
Q1 		– Sell
-2,600
Closed -$385K – 5149
2022
Q4 		$385K Hold
2,600
– – ﹤0.01% 3025
2022
Q3 		$367K Buy
+2,600
New +$380K ﹤0.01% 3175
2021
Q2 		– Sell
-900
Closed -$207K – 5383
2021
Q1 		$207K Sell
900
-200
-18% -$50.2K ﹤0.01% 3578
2020
Q4 		$295K Sell
1,100
-2,900
-73% -$723K ﹤0.01% 3152
2020
Q3 		$944K Buy
4,000
+1,000
+33% +$224K 0.01% 1692
2020
Q2 		$684K Buy
+3,000
New +$658K ﹤0.01% 1996
2020
Q1 		– Sell
-100
Closed -$16K – 4315
2019
Q4 		$16K Buy
+100
New +$15K ﹤0.01% 4017
2019
Q3 		– Sell
-4,200
Closed -$625K – 4252
2019
Q2 		$625K Buy
4,200
+1,700
+68% +$233K 0.01% 2001
2019
Q1 		$346K Sell
2,500
-4,400
-64% -$552K ﹤0.01% 2579
2018
Q4 		$741K Buy
+6,900
New +$769K 0.01% 2049

Other funds holding MASI

IA
IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return
HNB
Huntington National Bank Columbus, Ohio $20.6B AUM 34.61% 1-Year Est. Return

Walleye Trading's MASI Position: Q2 2026 in Review

Walleye Trading sold out of Masimo (MASI) in Q2 2026, closing a stake of 1,100 shares — an estimated $196K sold.

Walleye Trading first reported a position in MASI in Q2 2015 and held it in 16 quarters. The position peaked at $753K in Q4 2023. 2 funds tracked by Wall St. Rank hold MASI as of Q2 2026.

  • Walleye Trading reported no remaining Masimo position as of Q2 2026 after selling out during the quarter.
  • Walleye Trading sold 1,100 Masimo shares in Q2 2026, an estimated $196K.
  • Walleye Trading first reported a position in Masimo in Q2 2015 and held it in 16 quarters.
  • Walleye Trading's Masimo position peaked at $753K in Q4 2023.
  • 2 funds tracked by Wall St. Rank held Masimo as of Q2 2026.

Based on Walleye Trading's 13F filing for Q2 2026, filed 3 Aug 2026.