Opendoor Investor Presentation Deck

Non-GAAP references $ IN MILLIONS GAAP Gross Profit Gross Margin Adjustments: Inventory Valuation Adjustment - Current Period Inventory Valuation Adjustment - Prior Period Adjusted Gross Profit (Loss) Adjusted Gross Margin Direct Selling Costs Holding Costs on Sales - Current Period Holding Costs on Sales - Prior Period Contribution Profit (Loss) Contribution Margin Old Book $112 3.0% Nine Months Ended September 30, 2023 $12 ($447) ($323) (8.7%) ($103) ($24) ($60) ($510) (13.7%) New Book $303 12.9% $12 ($3) $312 13.2% ($68) ($17) ($5) $222 9.4% Total $415 6.8% $24 ($450) ($11) (0.2%) ($171) ($41) ($65) ($288) (4.7%) Appendix 38

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