Opendoor Technologies (NASDAQ: OPEN) shares rallied on Thursday after trading firm Jane Street Group disclosed a significant passive stake in the residential real estate platform.
The move added momentum to a stock that has already posted outsized gains in 2025, fueled by signs of resilience in the US housing market.
Jane Street becomes major shareholder
According to a 13G regulatory filing, Jane Street revealed it had acquired approximately 44 million shares of Opendoor, representing a 5.9% stake in the company.
The position makes the quantitative trading firm Opendoor’s third-largest shareholder, behind CEO Kaz Nejatian and investment giant Vanguard.
The disclosure pushed Opendoor’s stock 8.7% higher on Thursday’s trading session.
The stock is currently trading at $8.77, up by 6.58%.
Investors viewed the move as a strong vote of confidence from a well-known institutional player, reinforcing optimism around the company’s growth prospects.
Jane Street’s stake adds to a year marked by unusually volatile trading in Opendoor’s shares.
The stock has exhibited meme stock-like characteristics, with sharp swings and retail investor enthusiasm driving much of the momentum.
Even so, institutional interest has provided an additional layer of credibility to the rally.
Housing data fuels optimism
The filing came just one day after Opendoor shares jumped more than 16% on the back of strong US housing market data.
Figures released by the Census Bureau and the Department of Housing and Urban Development showed that new single-family home sales surged 20.5% in August compared with the previous month, reaching an annualized rate of 800,000 units.
The report exceeded both July’s revised 664,000 units and analysts’ expectations of 650,000, suggesting resilient demand despite elevated mortgage rates.
Investors interpreted the numbers as a positive signal for Opendoor, whose platform focuses on simplifying the buying and selling of residential real estate.
The upbeat housing data provided a backdrop for the Jane Street disclosure, combining macroeconomic tailwinds with company-specific developments to drive Opendoor shares higher.
One of 2025’s top market movers
Opendoor has been one of the standout performers in US equities this year.
As of Wednesday’s close, the stock had surged more than 400% year-to-date, propelled by both improving housing fundamentals and speculative enthusiasm.
Thursday’s news extended those gains, cementing Opendoor’s position as one of the market’s most closely watched momentum trades.
While the company has yet to shed its reputation for volatility, the latest developments suggest growing institutional interest alongside the retail-driven narrative.
Jane Street’s stake represents a meaningful endorsement and could signal further inflows from other investment firms.
Still, questions remain over how sustainable the rally will be given broader uncertainties in the housing market.
Mortgage rates remain high by historical standards, and potential shifts in US monetary policy could influence demand in the months ahead.
For now, however, investors appear encouraged by both the resilience of the housing sector and the institutional validation provided by Jane Street’s investment.
Together, these factors have reinforced Opendoor’s position as one of the most dynamic and closely followed names in 2025’s stock market.
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