HI
MASI

Harbour Investments’s Masimo MASI Stock Holding History

Harbour Investments’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 		$5.51K Buy
31
+22
+244% +$3.45K ﹤0.01% 3554
2025
Q4 		$1.17K Hold
9
– – ﹤0.01% 3422
2025
Q3 		$1.33K Hold
9
– – ﹤0.01% 3368
2025
Q2 		$1.51K Sell
9
-10
-53% -$1.6K ﹤0.01% 3204
2025
Q1 		$3.17K Sell
19
-183
-91% -$31.8K ﹤0.01% 2974
2024
Q4 		$33.4K Hold
202
– – ﹤0.01% 1902
2024
Q3 		$26.9K Hold
202
– – ﹤0.01% 1924
2024
Q2 		$25.4K Sell
202
-1
-0.5% -$132 ﹤0.01% 1850
2024
Q1 		$29.8K Sell
203
-16
-7% -$2.07K ﹤0.01% 1769
2023
Q4 		$25.7K Buy
219
+21
+11% +$1.96K ﹤0.01% 1753
2023
Q3 		$17.4K Buy
198
+15
+8% +$1.75K ﹤0.01% 1805
2023
Q2 		$30.1K Hold
183
– – ﹤0.01% 1591
2023
Q1 		$33.8K Hold
183
– – ﹤0.01% 1517
2022
Q4 		$27.1K Hold
183
– – ﹤0.01% 1547
2022
Q3 		$24K Hold
183
– – ﹤0.01% 1561
2022
Q2 		$24K Buy
+183
New +$24.5K ﹤0.01% 1561
2021
Q4 		$68K Sell
231
-26
-10% -$7.4K ﹤0.01% 1123
2021
Q3 		$70K Sell
257
-4
-2% -$1.08K ﹤0.01% 1568
2021
Q2 		$63K Buy
261
+1
+0.4% +$228 ﹤0.01% 1675
2021
Q1 		$60K Buy
+260
New +$65.3K ﹤0.01% 1583

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

Harbour Investments's MASI Position: Q1 2026 in Review

Harbour Investments increased its Masimo (MASI) stake by 244% in Q1 2026, buying an estimated $3.45K and bringing the position to 31 shares worth $5.51K. The position accounts for ﹤0.01% of the portfolio, ranked #3554.

Harbour Investments first reported a position in MASI in Q1 2021 and has held it in 20 quarters since. The position peaked at $70K in Q3 2021. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Harbour Investments held 31 shares of Masimo worth $5.51K as of Q1 2026.
  • Harbour Investments bought 22 Masimo shares in Q1 2026, an estimated $3.45K.
  • Masimo made up ﹤0.01% of Harbour Investments's portfolio in Q1 2026, its #3554 holding.
  • Harbour Investments first reported a position in Masimo in Q1 2021 and has held it in 20 quarters since.
  • Harbour Investments's Masimo position peaked at $70K in Q3 2021.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Harbour Investments's 13F filing for Q1 2026, filed 15 May 2026.