Form 4: Amplitude CTO Sells Shares Under 10b5-1 Plan

Amplitude, Inc. CTO Curtis Liu reported the sale of 22,201 shares of Class A Common Stock for approximately $177,700 under a pre-arranged 10b5-1 trading plan.

Summary

• Curtis Liu, Chief Technology Officer (CTO) of Amplitude, Inc., has reported a transaction involving the sale of 22,201 shares of Class A Common Stock.
• The sale occurred on June 1, 2026, with a weighted average sale price of $8.0259 per share, totaling approximately $177,700.
• These shares were sold as part of a Rule 10b5-1 trading plan, which was adopted by Liu on November 26, 2025.
• Following the transaction, Liu beneficially owns 1,004,779 shares of Class A Common Stock, which includes 880,520 restricted stock units.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral filing. While a sale by an executive can be a negative signal, the execution under a 10b5-1 plan mitigates concerns about insider trading and suggests a pre-planned financial strategy.

Positives

• The sale was conducted under a pre-established 10b5-1 trading plan, indicating adherence to insider trading regulations and providing a defense against accusations of insider trading.
• The reporting person, Curtis Liu, retains a significant beneficial ownership of 1,004,779 shares, suggesting continued commitment to the company.

Negatives

• A significant number of shares were sold by a key executive, which could be perceived negatively by the market, despite being executed under a plan.

Risks

• While the sale was executed under a 10b5-1 plan, large sales by executives can sometimes lead to negative market sentiment or investor concern about the executive's confidence in the company's future performance.

Future Outlook

No specific future outlook or guidance is provided in this Form 4 filing, as it solely reports a past transaction.

Management Comments

• The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on November 26, 2025.
• This transaction was executed in multiple trades at prices ranging from $8.0000 to $8.0600. The price reported in Column 4 above reflects the weighted average sale price.
• The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

Industry Context

StockSavvy.ai notes that Form 4 filings are standard disclosures for insider transactions. The use of a 10b5-1 plan by Amplitude's CTO is a common practice to manage personal stock sales in a compliant manner, especially for executives in publicly traded technology companies.

Stakeholder Impact

• Shareholders: May interpret the sale as a sign of reduced confidence, though the 10b5-1 plan provides a mitigating factor.
• Employees: Similar to shareholders, may have concerns, but the planned nature of the sale is important.
• Management: Demonstrates adherence to regulatory requirements for insider trading.

Next Steps

• Monitor future Form 4 filings for any additional transactions by Curtis Liu or other Amplitude executives.
• Observe any market reaction to this reported sale, although the 10b5-1 plan should temper significant negative sentiment.

Key Dates

Keywords

Amplitude Inc, AMPL, Form 4, Insider Trading, Stock Sale, 10b5-1 Plan, Curtis Liu, CTO, Beneficial Ownership, Class A Common Stock