HCA
MASI

Harbor Capital Advisors’s Masimo MASI Stock Holding History

Harbor Capital Advisors’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
-9,599
Closed -$1.25M – 1395
2025
Q4 		$1.25M Sell
9,599
-333
-3% -$47.7K 0.1% 284
2025
Q3 		$1.47M Sell
9,932
-16,480
-62% -$2.49M 0.11% 245
2025
Q2 		$4.44M Buy
+26,412
New +$4.22M 0.19% 182
2023
Q3 		– Sell
-3,466
Closed -$570K – 567
2023
Q2 		$570K Buy
+3,466
New +$603K 0.11% 214
2022
Q2 		– Sell
-3,186
Closed -$464K – 163
2022
Q1 		$464K Sell
3,186
-466
-13% -$89.5K 0.22% 80
2021
Q4 		$1.07M Buy
+3,652
New +$1.04M 0.39% 70

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

Harbor Capital Advisors's MASI Position: Q1 2026 in Review

Harbor Capital Advisors sold out of Masimo (MASI) in Q1 2026, closing a stake of 9,599 shares — an estimated $1.25M sold.

Harbor Capital Advisors first reported a position in MASI in Q4 2021 and held it in 6 quarters. The position peaked at $4.44M in Q2 2025. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Harbor Capital Advisors reported no remaining Masimo position as of Q1 2026 after selling out during the quarter.
  • Harbor Capital Advisors sold 9,599 Masimo shares in Q1 2026, an estimated $1.25M.
  • Harbor Capital Advisors first reported a position in Masimo in Q4 2021 and held it in 6 quarters.
  • Harbor Capital Advisors's Masimo position peaked at $4.44M in Q2 2025.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Harbor Capital Advisors's 13F filing for Q1 2026, filed 28 Apr 2026.