v3.26.1
Variable Interest Entities - Schedule of Financial Assets and Liabilities from Variable Interest Entities (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Variable Interest Entity [Line Items]            
Total assets [1] $ 3,171,273   $ 2,974,805      
Liabilities [1] 2,373,785   2,175,990      
Net Assets 797,488 $ 733,166 798,815 $ 722,010 $ 676,642 $ 633,218
Variable Interest Entity, Primary Beneficiary            
Variable Interest Entity [Line Items]            
Total assets 885,485   915,955      
Liabilities 293,073   167,444      
Net Assets 592,412   748,511      
Variable Interest Entity, Primary Beneficiary | Consolidated securitization            
Variable Interest Entity [Line Items]            
Total assets 40,271   58,275      
Liabilities 32,122   46,542      
Net Assets 8,149   11,733      
Variable Interest Entity, Primary Beneficiary | Consolidated warehouse entities            
Variable Interest Entity [Line Items]            
Total assets 408,695   167,158      
Liabilities 253,191   101,791      
Net Assets 155,504   65,367      
Variable Interest Entity, Primary Beneficiary | Other consolidated VIEs            
Variable Interest Entity [Line Items]            
Total assets 436,519   690,522      
Liabilities 7,760   19,111      
Net Assets 428,759   671,411      
Variable Interest Entity, Not Primary Beneficiary | Securitizations            
Variable Interest Entity [Line Items]            
Total assets 2,477,592   2,016,813      
Liabilities 1,732,126   1,426,987      
Net Assets 745,466   589,826      
Maximum Exposure to Losses $ 121,380   $ 101,670      
[1] The following table presents information on assets and liabilities related to VIEs that are consolidated by Upstart Holdings, Inc. at December 31, 2025 and June 30, 2026, respectively. The liabilities of each VIE can only be settled using the assets of the corresponding VIE and creditors of these entities do not have recourse to the general credit of Upstart Holdings, Inc. The assets and liabilities in the table below exclude intercompany balances that eliminate in consolidation.
December 31,June 30,
20252026
Assets
Cash and cash equivalents
$1,183 $2,850 
Restricted cash89,088 70,555 
Loans (at fair value)819,344 805,564 
Other assets (includes $225 and $104 at fair value as of December 31, 2025 and June 30, 2026, respectively)
6,340 6,516 
Total assets$915,955 $885,485 
Liabilities
Payable to investors$154 $— 
Borrowings97,333 251,758 
Payable to securitization note holders (at fair value)46,542 32,122 
Accrued expenses and other liabilities23,415 9,193 
Total liabilities167,444 293,073 
Total net assets$748,511 $592,412