Paul Gu Named in Securities Class Action Allegations
Written by Emily J. Thompson, Senior Investment Analyst
Updated: 1 hour ago
0mins
Source: PRnewswire
- Executive Accountability: Paul Gu, co-founder and CTO of Upstart Holdings, is named in a securities class action for failing to disclose flaws in the AI underwriting system between May 14 and November 4, 2025, leading to a 9.71% stock price drop and a loss of $4.49 per share, which undermines investor confidence.
- Stock Trading Activity: During the class period, Gu sold 5,000 shares of Upstart stock, generating proceeds exceeding $344,000, raising questions about his transparency and accountability in corporate governance.
- Technical Oversight Responsibility: As CTO, Gu is alleged to have direct responsibility for the AI model's over-responsiveness and its impact on financial results, with public statements regarding the model's accuracy deemed misleading, potentially causing investor losses.
- Legal Liability Framework: Under Section 20(a) of the Securities Exchange Act of 1934, Gu, as a controlling person, may bear personal liability for the company's violations of securities laws, which could have significant implications for his future career.
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Analyst Views on UPST
Wall Street analysts forecast UPST stock price to rise
13 Analyst Rating
7 Buy
4 Hold
2 Sell
Moderate Buy
Current: 30.290
Low
20.00
Averages
56.73
High
80.00
Current: 30.290
Low
20.00
Averages
56.73
High
80.00
About UPST
Upstart Holdings, Inc. is an artificial intelligence (AI) lending marketplace. The Company’s platform includes personal loans, automotive retail and refinance loans, home equity lines of credit (HELOCs), and small dollar loans. It applies artificial intelligence models and cloud applications to the process of underwriting consumer credit. Its AI marketplace connects consumers with its lending partner. Its consumers can access Upstart-powered loans via Upstart.com, through a lender-branded product on its lending partners’ own websites, and through auto dealerships that use its Upstart Auto Retail software. Its platform enables lenders provide a product their customers want, rather than letting customers seek loans from competitors. Its cloud-based software platform incorporates technologies and software development approaches to allow for development of new features, such as cloud-native technologies, data integrity and security, and configurable multi-tenant architecture, and others.
About the author

Emily J. Thompson
Emily J. Thompson, a Chartered Financial Analyst (CFA) with 12 years in investment research, graduated with honors from the Wharton School. Specializing in industrial and technology stocks, she provides in-depth analysis for Intellectia’s earnings and market brief reports.
- Loan Origination Growth: Upstart's loan originations surged by 61% year-over-year in Q1, with transaction volume increasing by 77%, indicating strong customer attraction and resulting in a 44% revenue growth despite a challenging high-interest-rate environment.
- Bank Charter Application: In March, Upstart announced its application for a national bank charter, which, if approved, would allow the company to accept deposits and fund loans, thereby reducing reliance on third-party funding sources and creating an additional revenue stream.
- Rising Expenses: Despite significant revenue growth, Upstart's expenses soared by 45% year-over-year in Q1, with sales and marketing costs jumping by 76%, leading to a net loss of $7 million, highlighting ongoing profitability challenges.
- Stock Price Volatility: Since the March 10 announcement of the bank charter plan, Upstart's stock has risen about 18%, yet it remains down approximately 26% year-to-date, reflecting market concerns regarding its long-term profitability.
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- Executive Accountability: Paul Gu, co-founder and CTO of Upstart Holdings, is named in a securities class action for failing to disclose flaws in the AI underwriting system between May 14 and November 4, 2025, leading to a 9.71% stock price drop and a loss of $4.49 per share, which undermines investor confidence.
- Stock Trading Activity: During the class period, Gu sold 5,000 shares of Upstart stock, generating proceeds exceeding $344,000, raising questions about his transparency and accountability in corporate governance.
- Technical Oversight Responsibility: As CTO, Gu is alleged to have direct responsibility for the AI model's over-responsiveness and its impact on financial results, with public statements regarding the model's accuracy deemed misleading, potentially causing investor losses.
- Legal Liability Framework: Under Section 20(a) of the Securities Exchange Act of 1934, Gu, as a controlling person, may bear personal liability for the company's violations of securities laws, which could have significant implications for his future career.
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- Lawsuit Background: Bronstein, Gewirtz & Grossman LLC has filed a class action lawsuit against Upstart Holdings, alleging violations of federal securities laws during the period from May 14, 2025, to November 4, 2025, seeking to recover damages for investors.
- Model Errors: The complaint claims that Upstart's AI underwriting model, Model 22, frequently overreacted to negative macroeconomic signals, leading to an overstatement of its accuracy and negatively impacting the company's revenue results.
- Misleading Revenue Guidance: Due to Model 22's overly conservative assessment of credit and macroeconomic conditions, Upstart's previously issued full-year 2025 revenue guidance is deemed unreliable, potentially exposing investors to greater financial risks.
- Investor Rights Protection: The law firm promises to represent investors on a contingency fee basis, meaning they will only charge fees if they successfully recover losses, ensuring that investors' rights are protected throughout the litigation process.
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- Class Action Reminder: The Schall Law Firm has alerted investors about a class action lawsuit against Upstart Holdings for violations of securities laws during the period from May 14, 2025, to November 4, 2025, with a deadline for participation set for June 8, 2026.
- False Statement Allegations: The complaint alleges that Upstart made false and misleading statements regarding its 'Model 22' AI, which poorly reacted to macroeconomic signals, resulting in investor losses when the truth was revealed, indicating significant operational deficiencies.
- Exaggerated Model Accuracy: Upstart is accused of overstating the overall accuracy of its AI models, which negatively impacted its business performance, undermining investor confidence and potentially affecting future financing capabilities.
- Potential Legal Consequences: Until the class action is certified, investors are not represented by an attorney, and those who choose not to act may remain absent class members, risking their rights to recover losses, highlighting the critical implications of legal proceedings on investor rights.
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- Market Performance Comparison: Financial stocks posted a mere 0.65% return in May, significantly lagging behind the S&P 500's 4.84% gain, indicating a cautious market sentiment that could dampen investor confidence in the sector.
- Short Interest Trends: The highest short interest was observed in consumer finance, asset management, payment processing, and financial data stocks, reflecting investor concerns over growth-oriented financial businesses, which may lead to increased financing costs for these firms.
- Insurance Companies' Favorable Outlook: Limited short selling in insurance-related companies and diversified financial holdings suggests a relatively optimistic investor outlook, potentially stabilizing their stock prices amid broader market volatility.
- Short Interest Rankings: As of the end of May, Upstart Holdings had the highest short interest at 27.87%, while Brookfield Wealth Solutions had a mere 0.66%, highlighting the stark differences in market confidence across various financial companies.
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- Significant Stock Drop: Upstart shares fell by $4.49, a 9.71% decline, after the company revealed that its AI model was suppressing loan approvals, directly impacting investor confidence and leading to a pessimistic outlook on future performance.
- Shift in Optimism: During the 'AI Day' in May 2025, Upstart showcased its latest Model 22 and projected full-year revenue of approximately $1.01 billion; however, over time, market confidence in its growth potential gradually diminished.
- Tightening Credit Policies: Despite management maintaining high revenue guidance in Q3 2025, Model 22 was actually tightening credit standards, resulting in reduced loan approvals and increased borrower interest rates, creating a stark contrast with investor expectations.
- Legal Action Risks: Due to management's failure to disclose the model's conservative performance in a timely manner, investors faced significant losses on November 4, 2025, and are currently involved in a securities class action lawsuit, which could impact the company's reputation and future financing capabilities.
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