MG
MASI

Mather Group’s Masimo MASI Stock Holding History

Mather Group’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
Q4 		– Sell
-6
Closed -$885 – 1245
2025
Q3 		$885 Buy
+6
New +$908 ﹤0.01% 1595
2025
Q2 		– Sell
-6
Closed -$1K – 1273
2025
Q1 		$1K Hold
6
– – ﹤0.01% 1640
2024
Q4 		$992 Hold
6
– – ﹤0.01% 1615
2024
Q3 		$800 Sell
6
-50
-89% -$5.8K ﹤0.01% 1578
2024
Q2 		$8.22K Buy
56
+50
+833% +$6.58K ﹤0.01% 1499
2024
Q1 		$703 Buy
+6
New +$775 ﹤0.01% 1660

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
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
NCMU
NAYA Capital Management (UK) London, United Kingdom $1.18B AUM 13.14% 1-Year Est. Return
Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $23.8B AUM 49.45% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return

Mather Group's MASI Position: Q4 2025 in Review

Mather Group sold out of Masimo (MASI) in Q4 2025, closing a stake of 6 shares — an estimated $885 sold.

Mather Group first reported a position in MASI in Q1 2024 and held it in 6 quarters. The position peaked at $8.22K in Q2 2024. 390 funds tracked by Wall St. Rank hold MASI as of Q4 2025.

  • Mather Group reported no remaining Masimo position as of Q4 2025 after selling out during the quarter.
  • Mather Group sold 6 Masimo shares in Q4 2025, an estimated $885.
  • Mather Group first reported a position in Masimo in Q1 2024 and held it in 6 quarters.
  • Mather Group's Masimo position peaked at $8.22K in Q2 2024.
  • 390 funds tracked by Wall St. Rank held Masimo as of Q4 2025.

Based on Mather Group's 13F filing for Q4 2025, filed 13 Jan 2026.