Form 4: Amplitude CTO Curtis Liu Sells Shares via 10b5-1 Plan

Amplitude, Inc. Chief Technology Officer Curtis Liu sold 17,586 shares of Class A Common Stock at a weighted average price of $8.1245.

Summary

• Curtis Liu, Chief Technology Officer and 10% owner of Amplitude, Inc., sold 17,586 shares of Class A Common Stock.
• The transaction occurred on May 4, 2026, at a weighted average price of $8.1245 per share.
• The sale was executed pursuant to a Rule 10b5-1 trading plan adopted on November 26, 2025.
• Following the transaction, Liu retains beneficial ownership of 1,067,259 shares, which includes 986,412 restricted stock units.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event, as the sale was executed through a pre-planned 10b5-1 mechanism, which is standard for executive compensation and liquidity management.

Positives

• The sale was conducted under a pre-arranged 10b5-1 trading plan, which typically indicates the transaction is not based on non-public material information.

Negatives

• The sale represents a reduction in the direct equity stake held by a key executive and 10% owner.

Risks

• Continued selling by major insiders or 10% owners can sometimes create downward pressure on the stock price or signal a lack of confidence in near-term appreciation.

Future Outlook

No specific forward-looking guidance regarding company performance was provided in this filing.

Industry Context

StockSavvy.ai notes that insider selling via 10b5-1 plans is a standard practice for executives to manage personal liquidity and is generally viewed as a neutral event rather than a reflection of company-specific operational outlook.

Comparison to Industry Standards

• The use of 10b5-1 plans is the industry standard for corporate insiders to sell shares while avoiding potential accusations of insider trading.
• The volume of shares sold relative to the total holdings of the CTO is relatively minor, consistent with routine portfolio diversification.

Stakeholder Impact

• Minimal impact expected on shareholders as the sale was pre-planned and represents a small portion of the insider's total holdings.

Next Steps

• Monitor future Form 4 filings for additional insider activity.

Key Dates

Keywords

Amplitude, AMPL, Insider Trading, Form 4, Chief Technology Officer, Equity Sale