Form 4: Klaviyo CEO Andrew Bialecki Executes Stock Sale

Klaviyo Co-CEO Andrew Bialecki sold 200,000 shares of Series A Common Stock pursuant to a pre-established Rule 10b5-1 trading plan.

Summary

• Co-CEO Andrew Bialecki converted 200,000 shares of Series B Common Stock into Series A Common Stock.
• The converted shares were subsequently sold in two tranches on May 12, 2026.
• The first tranche of 58,684 shares was sold at a weighted average price of $14.97.
• The second tranche of 141,316 shares was sold at a weighted average price of $14.46.
• The transactions were executed under a Rule 10b5-1 trading plan adopted on May 20, 2025.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event, as the sale was executed through a pre-planned, automated trading program rather than a discretionary market move.

Positives

• The sale was conducted via a pre-planned Rule 10b5-1 trading plan, which is a standard mechanism for executives to sell stock without triggering insider trading concerns.

Negatives

• The transaction represents a reduction in the direct beneficial ownership of the Co-CEO.

Risks

• Continued selling by major insiders could potentially exert downward pressure on the stock price.

Future Outlook

No specific forward-looking guidance regarding company operations was provided in this filing, as it is a standard disclosure of insider transaction activity.

Industry Context

StockSavvy.ai notes that insider selling via 10b5-1 plans is a common practice for executives at publicly traded technology companies to manage personal liquidity and tax obligations, and it generally does not signal a lack of confidence in the company's long-term prospects.

Comparison to Industry Standards

• The use of Rule 10b5-1 plans is the industry standard for corporate executives to ensure compliance with SEC regulations while liquidating equity positions.

Related Party Transactions

• The reporting person maintains beneficial ownership of shares held in various family trusts and by his spouse.

Stakeholder Impact

• Minimal impact expected as the sale was pre-planned and disclosed in accordance with regulatory requirements.

Next Steps

• Continued monitoring of future Form 4 filings for further insider activity.

Key Dates

Keywords

Klaviyo, KVYO, Insider Trading, Form 4, Andrew Bialecki, Stock Sale, Rule 10b5-1