WAM
MASI

Wilson Asset Management’s Masimo MASI Stock Holding History

Wilson Asset 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
2026
Q1 		$11.4M Buy
63,984
+24,547
+62% +$3.85M 3.21% 16
2025
Q4 		$5.13M Buy
39,437
+12,203
+45% +$1.75M 1.32% 23
2025
Q3 		$4.02M Hold
27,234
– – 0.99% 31
2025
Q2 		$4.58M Buy
+27,234
New +$4.35M 1.13% 28

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

Wilson Asset Management's MASI Position: Q1 2026 in Review

Wilson Asset Management increased its Masimo (MASI) stake by 62% in Q1 2026, buying an estimated $3.85M and bringing the position to 63,984 shares worth $11.4M. The position accounts for 3.21% of the portfolio, ranked #16.

Wilson Asset Management first reported a position in MASI in Q2 2025 and has held it in 4 quarters since. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Wilson Asset Management held 63,984 shares of Masimo worth $11.4M as of Q1 2026.
  • Wilson Asset Management bought 24,547 Masimo shares in Q1 2026, an estimated $3.85M.
  • Masimo made up 3.21% of Wilson Asset Management's portfolio in Q1 2026, its #16 holding.
  • Wilson Asset Management first reported a position in Masimo in Q2 2025 and has held it in 4 quarters since.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Wilson Asset Management's 13F filing for Q1 2026, filed 12 May 2026.