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	$1.6M	Sell	341,200 -32,600	-9%	-$176K	0.04%	72
2025 Q4	$2.18M	Buy	373,800 +300,640	+411%	+$2.15M	0.05%	91
2025 Q3	$564K	Buy	73,160 +51,460	+237%	+$209K	0.04%	146
2025 Q2	$11.2K	Hold	21,700	–	–	﹤0.01%	254
2025 Q1	$21.4K	Hold	21,700	–	–	﹤0.01%	323
2024 Q4	$33.6K	Buy	+21,700	New	+$39.3K	﹤0.01%	276
2021 Q4	–	Sell	-10,719	Closed	-$213K	–	376
2021 Q3	$213K	Sell	10,719 -22,216	-67%	-$359K	0.02%	306
2021 Q2	$565K	Buy	+32,935	New	+$566K	0.06%	165

Other funds holding OPEN

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Lennar Corp Miami, Florida $64M AUM

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

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. 359 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.
359 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.