Bialecki Andrew 4

What Happened

• Andrew Bialecki, Klaviyo's Chief Executive Officer, converted Series B common stock into Series A shares and sold 200,000 shares in an open‑market transaction on May 19, 2026. The sales totaled approximately $2,976,000 at a weighted average price of $14.88 per share.
• The Form 4 also shows related derivative conversion activity (conversion/disposition of Series B shares) connected to the share issuance used for the sale.

Key Details

• Transaction date: May 19, 2026.
• Sale: 200,000 shares sold in multiple transactions at prices ranging from $14.68 to $15.41; weighted average $14.88; total proceeds ≈ $2,976,000 (footnote F3).
• Conversion: Series B common stock convertible into Series A common stock (footnote F2). The filing shows conversion entries reflecting that mechanism.
• Plan: Transactions were effected under a Rule 10b5‑1 trading plan adopted May 20, 2025 (footnote F1).
• Trust holdings: Several shares are held in related trusts (footnotes F4–F6); Bialecki disclaims beneficial ownership of those trust shares except to the extent of any pecuniary interest.
• Shares owned after transaction: not specified in the filing.
• Filing: Form 4 filed May 20, 2026 for May 19 transactions — appears timely.

Context

• This was a sale of shares generated by converting Series B into Series A and selling the resulting common shares. Sales executed under a 10b5‑1 plan are pre‑arranged and often represent routine liquidity rather than an immediate personal view on the company. The filing offers to provide a breakdown of how many shares were sold at each price within the reported range upon request (footnote F3).