D.E. Shaw & Co
MASI

D.E. Shaw & Co’s Masimo MASI Stock Holding History

D.E. Shaw & Co’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
2024
Q4 		– Sell
-7,900
Closed -$1.05M – 4666
2024
Q3 		$1.05M Hold
7,900
– – ﹤0.01% 3238
2024
Q2 		$995K Hold
7,900
– – ﹤0.01% 3212
2024
Q1 		$1.16M Hold
7,900
– – ﹤0.01% 2995
2023
Q4 		$926K Buy
+7,900
New +$736K ﹤0.01% 3181
2021
Q3 		– Sell
-26,600
Closed -$6.45M – 5109
2021
Q2 		$6.45M Hold
26,600
– – 0.01% 1842
2021
Q1 		$6.11M Buy
+26,600
New +$6.68M 0.01% 1702
2020
Q4 		– Sell
-10,000
Closed -$2.36M – 4052
2020
Q3 		$2.36M Hold
10,000
– – ﹤0.01% 2278
2020
Q2 		$2.28M Buy
+10,000
New +$2.19M ﹤0.01% 2315

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

D.E. Shaw & Co's MASI Position: Q1 2026 in Review

D.E. Shaw & Co reduced its Masimo (MASI) stake by 70% in Q1 2026, selling an estimated $7.26M and leaving 19,789 shares worth $3.52M. The position accounts for ﹤0.01% of the portfolio, ranked #2449.

D.E. Shaw & Co first reported a position in MASI in Q2 2013 and has held it in 41 quarters since. The position peaked at $104M in Q1 2022. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • D.E. Shaw & Co held 19,789 shares of Masimo worth $3.52M as of Q1 2026.
  • D.E. Shaw & Co sold 46,227 Masimo shares in Q1 2026, an estimated $7.26M.
  • Masimo made up ﹤0.01% of D.E. Shaw & Co's portfolio in Q1 2026, its #2449 holding.
  • D.E. Shaw & Co first reported a position in Masimo in Q2 2013 and has held it in 41 quarters since.
  • D.E. Shaw & Co's Masimo position peaked at $104M in Q1 2022.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on D.E. Shaw & Co's 13F filing for Q1 2026, filed 15 May 2026.