Bialecki Andrew 4

What Happened

• Andrew Bialecki, CEO of Klaviyo, sold a total of 200,000 shares in two open-market tranches on Feb 24, 2026, generating approximately $3,352,971 in proceeds. The larger tranche was 160,356 shares at a weighted average price of $16.86 (sales ranged $16.535–$17.53) for $2,703,602; the smaller tranche was 39,644 shares at a weighted average price of $16.38 (sales ranged $15.83–$16.53) for $649,369.
• The filing also reports conversion activity on the same date: a 200,000-share conversion of a derivative/Series B holding into common stock (non‑cash conversion per footnote F2) and a related derivative entry reported as disposed at $0. These conversion entries reflect class conversion mechanics disclosed in the filing.

Key Details

• Transaction date: February 24, 2026; Form 4 filed Feb 26, 2026 (reporting period 2026-02-24).
• Open-market sales: 160,356 shares @ weighted avg $16.86 (range $16.535–$17.53) and 39,644 shares @ weighted avg $16.38 (range $15.83–$16.53); total proceeds ≈ $3.35M.
• Conversion: 200,000-share conversion of Series B to Series A common stock (see footnote F2); a related derivative security was reported as disposed at $0.
• Trades were effected under a Rule 10b5-1 trading plan adopted May 20, 2025 (footnote F1).
• Several holdings are held in trusts for which Bialecki is trustee (footnotes F5–F7); he disclaims beneficial ownership of those shares except to the extent of any pecuniary interest.
• Shares owned after the transactions are not specified in the excerpted filing.

Context

• These sales were executed under a pre-established 10b5-1 plan, which typically schedules trades in advance and is commonly used to avoid questions about timing; such sales are often routine and do not necessarily signal a change in insider sentiment.
• The conversion of Series B into Series A is a non-cash corporate/administrative action (per footnote F2) and should not be read as a market purchase.
• No late-filing flag is indicated in the filing; the Form 4 was filed two days after the transaction date.