DFCM
MASI

Dark Forest Capital Management’s Masimo MASI Stock Holding History

Dark Forest Capital 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 		– Sell
-16,385
Closed -$2.13M – 996
2025
Q4 		$2.13M Buy
16,385
+6,376
+64% +$913K 0.1% 367
2025
Q3 		$1.48M Buy
+10,009
New +$1.52M 0.06% 592
2023
Q2 		– Sell
-510
Closed -$94.1K – 1243
2023
Q1 		$94.1K Buy
+510
New +$86K 0.02% 674
2022
Q3 		– Sell
-5
Closed -$1K – 1310
2022
Q2 		$1K Buy
+5
New +$669 ﹤0.01% 800
2022
Q1 		– Sell
-93
Closed -$27K – 1566
2021
Q4 		$27K Buy
+93
New +$26.5K 0.01% 584

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

Dark Forest Capital Management's MASI Position: Q1 2026 in Review

Dark Forest Capital Management sold out of Masimo (MASI) in Q1 2026, closing a stake of 16,385 shares — an estimated $2.13M sold.

Dark Forest Capital Management first reported a position in MASI in Q4 2021 and held it in 5 quarters. The position peaked at $2.13M in Q4 2025. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Dark Forest Capital Management reported no remaining Masimo position as of Q1 2026 after selling out during the quarter.
  • Dark Forest Capital Management sold 16,385 Masimo shares in Q1 2026, an estimated $2.13M.
  • Dark Forest Capital Management first reported a position in Masimo in Q4 2021 and held it in 5 quarters.
  • Dark Forest Capital Management's Masimo position peaked at $2.13M in Q4 2025.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Dark Forest Capital Management's 13F filing for Q1 2026, filed 15 May 2026.