CP
MASI

CenterBook Partners’s Masimo MASI Stock Holding History

CenterBook Partners’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
Q1 		– Sell
-3,148
Closed -$409K – 720
2025
Q4 		$409K Buy
+3,148
New +$451K 0.02% 502
2024
Q3 		– Sell
-25,293
Closed -$3.19M – 500
2024
Q2 		$3.19M Sell
25,293
-16,020
-39% -$2.11M 0.2% 194
2024
Q1 		$6.07M Buy
41,313
+1,909
+5% +$246K 0.42% 69
2023
Q4 		$4.62M Sell
39,404
-1,772
-4% -$165K 0.56% 40
2023
Q3 		$3.61M Buy
41,176
+11,421
+38% +$1.33M 0.45% 59
2023
Q2 		$4.9M Buy
29,755
+15,245
+105% +$2.65M 0.61% 30
2023
Q1 		$2.68M Buy
14,510
+8,584
+145% +$1.45M 0.38% 86
2022
Q4 		$877K Sell
5,926
-1,117
-16% -$154K 0.14% 216
2022
Q3 		$994K Buy
7,043
+581
+9% +$84.9K 0.19% 176
2022
Q2 		$844K Sell
6,462
-333
-5% -$44.6K 0.18% 195
2022
Q1 		$989K Buy
6,795
+3,995
+143% +$767K 0.35% 89
2021
Q4 		$820K Buy
+2,800
New +$797K 0.48% 61

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 $298B AUM 21.96% 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

CenterBook Partners's MASI Position: Q1 2026 in Review

CenterBook Partners sold out of Masimo (MASI) in Q1 2026, closing a stake of 3,148 shares — an estimated $409K sold.

CenterBook Partners first reported a position in MASI in Q4 2021 and held it in 12 quarters. The position peaked at $6.07M in Q1 2024. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • CenterBook Partners reported no remaining Masimo position as of Q1 2026 after selling out during the quarter.
  • CenterBook Partners sold 3,148 Masimo shares in Q1 2026, an estimated $409K.
  • CenterBook Partners first reported a position in Masimo in Q4 2021 and held it in 12 quarters.
  • CenterBook Partners's Masimo position peaked at $6.07M in Q1 2024.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on CenterBook Partners's 13F filing for Q1 2026, filed 5 May 2026.