Upstart Holdings, Inc. [UPST] Securities Class Action Lawsuit Update

• Case Name: Dunn v. Upstart Holdings, Inc., et al.
• Case No.: 3:26-cv-02974
• Jurisdiction: United States District Court, Northern District of California
• Filed on: April 7, 2026
• Class Period: May 14, 2025 through November 4, 2025, inclusive.

Introduction

Upstart Holdings, Inc. (NASDAQ: UPST) faces a newly filed securities class action that turns on a single core allegation: the company’s highly promoted AI underwriting engine, “Model 22,” allegedly did not perform as represented during the May 14, 2025 to November 4, 2025 class period. According to the complaint, investors allege that management repeatedly tied revenue growth, conversion gains, and higher approval rates to Model 22’s enhanced “risk separation,” while omitting that the model was allegedly overreacting to macroeconomic signals and tightening credit too aggressively.

The alleged break came on November 4, 2025, when Upstart disclosed weaker-than-expected Q3 revenue, reduced Q4 guidance, and lowered full-year 2025 expectations, while executives attributed the miss to the model’s own conservatism and “overresponsive[ness]” to macro signals. The market reaction was immediate: UPST fell 9.71% the following day.

“Most UPST shareholders never file or join the class action, which means they miss out on potential recovery funds,” said Attorney Joseph Levi.

Backdrop and Business Context

Upstart’s business model is unusually exposed to the credibility of its algorithms. The company operates a cloud-based AI lending platform spanning unsecured personal loans, auto refinance, auto retail loans, home equity lines, and related products. The complaint alleges that Upstart repeatedly told investors its AI underwriting could approve more qualified borrowers at lower rates than traditional methods.

That promise became sharper in early May 2025 with the launch of Model 22. Management allegedly framed the release as a major technical leap, repeatedly citing stronger neural network architecture, better dynamic macro modeling, and materially improved “separation accuracy.” By August 2025, executives had raised full-year revenue guidance to approximately $1.055 billion and fee revenue to roughly $990 million, explicitly crediting the model for stronger conversions and loan growth.

The business context matters because this is not a generic earnings-miss lawsuit. The alleged misconduct sits inside the company’s core product logic. Because the complaint centers on Upstart’s core underwriting model, the alleged statements about calibration and macro sensitivity are presented as material to investors.

Promises Made vs. Reality

The complaint draws a stark contrast between what Upstart said publicly and what it later admitted.

During AI Day, management told investors that model accuracy directly drove more approvals. The investor materials allegedly highlighted that proprietary AI “drives more approvals,” while executives described Upstart as a “category of one” business and highlighted the claimed advantages of its AI underwriting.

In the August 2025 earnings call, CEO Dave Girouard attributed growth primarily to “model improvements,” specifically saying the quarter’s conversion gains came “first and foremost from Model 22.” CTO Paul Gu then claimed the new architecture increased separation accuracy by 17 percentage points. The Q2 10-Q reinforced the same message, stating that transaction volume and conversion rate gains were “primarily driven” by underwriting model improvements.

Then the story bent.

By the November 4, 2025 call, executives acknowledged that the model had “overreact[ed]” to macroeconomic signals, reducing approvals and conversion rates. More notably, Gu allegedly admitted management had “knowingly” made the model more conservative on credit earlier in the quarter. The complaint uses those statements as the hinge point for falsity and scienter, arguing the same executives who celebrated Model 22’s growth effects were already aware of its revenue-dampening conservatism.

This is where the case becomes less about missed estimates and more about disclosure timing.

Timeline of Alleged Misconduct and Disclosures

The chronology is unusually clean.

The class period opens on May 14, 2025, when Upstart hosted its inaugural AI Day and allegedly emphasized that proprietary model accuracy was translating into superior approval outcomes.

On August 5, 2025, after reporting Q2 results, management raised both quarterly and full-year guidance. Executives again tied the improvement to Model 22’s underwriting gains, higher conversions, and operational leverage.

The corrective disclosure arrived on November 4, 2025. After market close, Upstart reported Q3 revenue of $277 million, below the roughly $280 million guide and below consensus by $2.62 million. It also guided Q4 revenue to only $288 million versus analyst expectations of $303.7 million and cut full-year 2025 revenue guidance to approximately $1.035 billion.

During the call that followed, executives tied the shortfall directly to model conservatism, overreaction to macro signals, and measurement error in the calibration process. By November 5, the stock closed down $4.49 per share, or 9.71%, at $41.75.

The narrative sequence is the complaint’s theory in miniature: promotional statements, raised guidance, concealed model instability, disclosure, repricing.

Investor Harm and Market Reaction

Loss causation in this case is unusually document-driven.

The complaint ties investor harm to a specific corrective event: the November 4 earnings release and accompanying admissions that Model 22 allegedly became more conservative after reacting to macroeconomic signals, reducing approvals and conversion rates. The resulting 9.71% one-day decline anchors the alleged damages theory.

Analyst reactions amplified the market signal. The complaint cites multiple price-target cuts, including Morgan Stanley lowering its target to $45 from $70, Goldman Sachs to $40 from $54, and similar reductions from Citigroup, Bank of America, Needham, and Stephens. The common thread in those reactions was concern over model visibility, responsiveness, and the durability of forecast assumptions.

Beyond the one-day drop, the complaint frames a company-specific disclosure and valuation issue tied to Upstart’s AI underwriting model.

Litigation and Procedural Posture

The complaint, filed in the Northern District of California, asserts claims under Section 10(b) and Rule 10b-5 against Upstart and four senior executives, plus Section 20(a) control-person claims against the individual defendants.

The named executives include CEO Dave Girouard, CFO Sanjay Datta, CTO Paul Gu, and CMO Chantal Rapport. Scienter allegations focus heavily on two themes: contemporaneous executive knowledge of the model’s conservative calibration and insider stock sales during the class period. The complaint alleges Girouard sold 208,335 shares for proceeds exceeding $13.5 million, Datta sold 26,985 shares for more than $1.4 million, and Gu sold 5,000 shares for more than $344,000.

The pleading also leans on Gu’s alleged admission that management had “knowingly” made credit decisions more conservative earlier in Q3, positioning that statement as direct support for scienter.

At this stage, the case is in the complaint phase. The next major litigation milestone will likely be appointment of lead plaintiff and lead counsel, followed by any motion to dismiss centered on falsity, safe harbor, and whether the alleged statements are actionable descriptions of model performance versus protected forward-looking optimism.

SEC Filings & Risk Factors

The SEC-filings section is central because the complaint specifically targets statements in Upstart’s August 5, 2025 Form 10-Q.

That filing allegedly stated transaction volume was driven by AI model improvements and that higher approval rates in smaller-dollar loans reflected underwriting enhancements. It also said conversion rates historically benefited from better risk evaluation accuracy and more automated verification.

The complaint argues those statements omitted a known adverse trend: that Model 22 was allegedly becoming too conservative in response to macro signals and materially reducing approvals, conversions, and revenue visibility. On that basis, plaintiffs also invoke Item 303 of Regulation S-K, alleging the company failed to disclose a known trend or uncertainty reasonably likely to have a material unfavorable effect on revenue.

The complaint also advances an Item 303 theory based on alleged omission of a known adverse trend affecting revenue.

How to Join the Upstart Holdings (UPST) Class Action

• Confirm you purchased UPST shares during the May 14, 2025 to November 4, 2025 class period
• Review eligibility details in the filed complaint and class notice materials, if any
• Click here to check eligibility

Disclaimer: This shareholder alert is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for personalized guidance. No specific outcomes are guaranteed.