STA
MASI

Summit Trail Advisors’s Masimo MASI Stock Holding History

Summit Trail 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 		$454K Sell
2,551
-9,145
-78% -$1.44M 0.01% 1191
2025
Q4 		$1.52M Buy
11,696
+7,971
+214% +$1.14M 0.03% 579
2025
Q3 		$550K Sell
3,725
-3,435
-48% -$520K 0.01% 1054
2025
Q2 		$1.2M Buy
+7,160
New +$1.14M 0.02% 405
2018
Q1 		– Sell
-29
Closed -$3K – 1160
2017
Q4 		$3K Buy
+29
New +$2.52K ﹤0.01% 1555

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

Summit Trail Advisors's MASI Position: Q1 2026 in Review

Summit Trail Advisors reduced its Masimo (MASI) stake by 78% in Q1 2026, selling an estimated $1.44M and leaving 2,551 shares worth $454K. The position accounts for 0.01% of the portfolio, ranked #1191.

Summit Trail Advisors first reported a position in MASI in Q4 2017 and has held it in 5 quarters since. The position peaked at $1.52M in Q4 2025. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Summit Trail Advisors held 2,551 shares of Masimo worth $454K as of Q1 2026.
  • Summit Trail Advisors sold 9,145 Masimo shares in Q1 2026, an estimated $1.44M.
  • Masimo made up 0.01% of Summit Trail Advisors's portfolio in Q1 2026, its #1191 holding.
  • Summit Trail Advisors first reported a position in Masimo in Q4 2017 and has held it in 5 quarters since.
  • Summit Trail Advisors's Masimo position peaked at $1.52M in Q4 2025.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Summit Trail Advisors's 13F filing for Q1 2026, filed 12 May 2026.