Bialecki Andrew 4

What Happened
Andrew Bialecki, CEO of Klaviyo (KVYO), converted 212,529 shares of Series B common stock into Series A common stock and sold those 212,529 shares in the open market on May 26, 2026. The sale was reported as a weighted-average price of $14.61 per share for total proceeds of approximately $3,105,049. The filing shows the conversion of the derivative security (Series B) that produced the shares sold.

Key Details

• Transaction date: May 26, 2026; Form 4 filed May 28, 2026 (appears timely).
• Sale: 212,529 shares disposed in open-market transactions at a weighted average price of $14.61; prices ranged from $14.43 to $15.00 per share. Proceeds ≈ $3.11M.
• Conversion: 212,529 Series B shares were converted (derivative conversion) into Series A common stock prior to the sale (see footnote F2 on convertibility).
• Plan note: Transactions were effected under a Rule 10b5-1 trading plan adopted by Bialecki on May 20, 2025 (footnote F1).
• Ownership after transaction: not specified in the information provided in your summary.
• Trusts/disclaimer: Several holdings are reported as held in related trusts (footnotes F4–F6); Bialecki disclaims Section 16 beneficial ownership of those trust-held shares except to the extent of any pecuniary interest.

Context

• The filing shows a conversion of convertible Series B stock into common shares and an immediate market sale; this is a routine way insiders monetize holdings.
• The sale was executed under a pre-established 10b5-1 plan, which is common for scheduled insider sales and reduces concerns about trading on nonpublic information.
• Footnote F3 notes the reported sale price is a weighted average; the filer can provide a per-trade breakdown on request.