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Klaviyo, Inc.·4

May 28, 8:08 PM ET

Bialecki Andrew 4

4 · Klaviyo, Inc. · Filed May 28, 2026

Research Summary

AI-generated summary of this filing

Updated

Klaviyo (KVYO) CEO Andrew Bialecki Sells 212,529 Shares

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.

Insider Transaction Report

Form 4
Period: 2026-05-26
Klaviyo, Inc.KVYO
Bialecki Andrew
DirectorCo-Chief Executive Officer10% Owner
Transactions
  • Conversion

    Series A Common Stock

    [F1][F2]
    2026-05-26+212,529→ 212,529 total
  • Sale

    Series A Common Stock

    [F1][F3]
    2026-05-26$14.61/sh−212,529$3,105,049→ 0 total
  • Conversion

    Series B Common Stock

    [F2][F1]
    2026-05-26−212,529→ 66,731,589 total
    → Series A Common Stock (212,529 underlying)
Holdings

  • Series B Common Stock

    [F2][F4]
    (indirect: By Trust)
    → Series A Common Stock (7,517,410 underlying)
    7,517,410

  • Series B Common Stock

    [F2][F5]
    (indirect: By Trust)
    → Series A Common Stock (517,006 underlying)
    517,006

  • Series B Common Stock

    [F2][F6]
    (indirect: By Trust)
    → Series A Common Stock (517,006 underlying)
    517,006

  • Series B Common Stock

    [F2]
    (indirect: By Spouse)
    → Series A Common Stock (43,218 underlying)
    43,218
Footnotes (6)
  • [F1]These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 20, 2025.
  • [F2]Each share of the Issuer's Series B Common Stock, par value $0.001 per share ("Series B Common Stock"), is convertible at any time at the option of the holder into one share of the Issuer's Series A Common Stock, par value $0.001 per share ("Series A Common Stock"), and will automatically convert into one share of Series A Common Stock upon the occurrence of certain events as set forth in the Issuer's certificate of incorporation. The Series B Common Stock has no expiration date.
  • [F3]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $14.43 to $15.00 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
  • [F4]Shares held by the Andrew P. Bialecki Grantor Retained Annuity Trust I of 2023, of which the Reporting Person serves as trustee. The Reporting Person disclaims Section 16 beneficial ownership of such shares except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed to be an admission that he has beneficial ownership of such shares for Section 16 or any other purpose.
  • [F5]Shares held by the Elizabeth L. Bialecki Irrevocable GST Trust of 2023, of which the Reporting Person serves as a trustee. The Reporting Person disclaims Section 16 beneficial ownership of such shares except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed to be an admission that he has beneficial ownership of such shares for Section 16 or any other purpose.
  • [F6]Shares held by the Andrew P. Bialecki Irrevocable GST Trust of 2023, of which the Reporting Person's spouse serves as a trustee. The Reporting Person disclaims Section 16 beneficial ownership of such shares except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed to be an admission that he has beneficial ownership of such shares for Section 16 or any other purpose.
Signature
/s/ Landon Edmond, Attorney-in-Fact|2026-05-28

Documents

1 file
  • 4
    wk-form4_1780013281.xmlPrimary

    FORM 4