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Marathon Trading Investment Management’s Opendoor OPEN Stock Holding History

Marathon Trading Investment Management’s Portfolio OPEN Stock Details OPEN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-100
Closed -$583 – 357
2025
Q4 		$583 Sell
100
-11,163
-99% -$80K ﹤0.01% 343
2025
Q3 		$86.9K Buy
+11,263
New +$45.7K 0.01% 242

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Jane Street
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American Century Companies
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LC
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Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Renaissance Technologies
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D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

Marathon Trading Investment Management's OPEN Position: Q1 2026 in Review

Marathon Trading Investment Management reduced its Opendoor (OPEN) stake by 8.7% in Q1 2026, selling an estimated $176K and leaving 341,200 shares worth $1.6M. The position accounts for 0.04% of the portfolio, ranked #72.

Marathon Trading Investment Management first reported a position in OPEN in Q2 2021 and has held it in 8 quarters since. The position peaked at $2.18M in Q4 2025. 360 funds tracked by Wall St. Rank hold OPEN as of Q1 2026.

  • Marathon Trading Investment Management held 341,200 shares of Opendoor worth $1.6M as of Q1 2026.
  • Marathon Trading Investment Management sold 32,600 Opendoor shares in Q1 2026, an estimated $176K.
  • Opendoor made up 0.04% of Marathon Trading Investment Management's portfolio in Q1 2026, its #72 holding.
  • Marathon Trading Investment Management first reported a position in Opendoor in Q2 2021 and has held it in 8 quarters since.
  • Marathon Trading Investment Management's Opendoor position peaked at $2.18M in Q4 2025.
  • 360 funds tracked by Wall St. Rank held Opendoor as of Q1 2026.

Based on Marathon Trading Investment Management's 13F filing for Q1 2026, filed 14 May 2026.