Kuehn Law, PLLC, is investigating potential fiduciary duty breaches by officers and directors of Upstart Holdings, Inc. (NASDAQ: UPST). The firm alleges the company misrepresented the performance of its latest AI model, impacting revenue reliability.

The investigation centers on a federal securities lawsuit claiming Upstart failed to disclose that Model 22 frequently overreacted to negative macroeconomic signals during risk-separation processes. According to the suit, this behavior rendered the model's overall accuracy and loan approval rate propensity overstated.

Alleged Impact on Financial Guidance

The lawsuit asserts that Model 22's overly conservative assessment of credit and macroeconomic conditions significantly negatively impacted Upstart's revenue results. Consequently, the firm alleges that the company's previously issued FY2025 revenue guidance was unreliable or unrealistic.

Shareholder Action Details

Shareholders who purchased UPST stock prior to May 14, 2025, are encouraged to contact Sophia Anne Silayan at sophiaanne@kuehn.law or call (833) 672-0814. Kuehn Law states it pays all case costs and does not charge investor clients.

The firm notes that there may be limited time for shareholders to enforce their rights. Kuehn Law emphasizes that shareholder participation contributes to the integrity and fairness of financial markets.

What the Numbers Show

The core allegation links a specific technical failure in Model 22—overreacting to macroeconomic signals—to a material financial outcome: unreliable FY2025 revenue guidance. This suggests the litigation hinges on whether the AI model's conservatism directly caused a divergence between projected and actual revenue capabilities, rather than general market conditions.

Upstart Holdings Inc (NASDAQ: UPST) reported monthly origination volume of $1,342.1 million for August 2026. The AI lending marketplace also released its latest Upstart Macro Index (UMI) reading, which remained unchanged at 1.50.

The company processed these originations over 26.5 effective funding days. This activity resulted in a daily origination average of $50.7 million. These figures represent the total principal amount of loan originations facilitated through the platform during the period.

Macro Risk Assessment

The September 3, 2026 UMI reading of 1.50 matches the previous reading from August 3, 2026. This index estimates the impact of the macroeconomy on credit losses for Upstart-powered loans.

A UMI of 1.50 is approximately 50% above the baseline expected in a normal economy, which is set at 1.0. The index has remained above this baseline since early 2022. However, it stays below the series peak of 1.68 recorded in 2024.

What the Numbers Show

The stability of the UMI at 1.50 suggests that Upstart’s underwriting models continue to price in elevated macroeconomic risk relative to historical norms. While the index indicates sustained default risk pressure compared to the long-run baseline, the fact that it remains below the 2024 peak implies that current risk assumptions are less severe than those observed two years ago. This divergence between the current elevated state and the prior peak provides context for the risk profile embedded in new loan approvals.

Methodology Notes

Originations refer to Transaction Volume Dollars as defined in SEC filings. Origination days are calculated based on a 24-hour funding window ending at approximately 5:00 pm Eastern Time. Weekend days and bank holidays are weighted at 0.55 days to reflect lower application activity.

The data provided is unaudited and preliminary. It is subject to completion of financial closing procedures for quarterly results.