Bialecki Andrew - 14 May 2025 Form 4 Insider Report for Klaviyo, Inc. (KVYO)

Reporting relationship: Chief Executive Officer, Director, 10%+ Owner
Issuer ticker: KVYO
Reported as of: 14 May 2025
Net transaction value: -$360,559,956
SEC form: 4
Accepted by SEC: 16 May 2025, 20:59:46 UTC
Prior SEC filing: 20 Sep 2023
Next SEC filing: 11 Jun 2025
Source filing: View source filing
Reporting owner signature: /s/ Landon Edmond, Attorney-in-Fact

Key filing fact

Bialecki Andrew filed Form 4 for Klaviyo, Inc. (KVYO) on 16 May 2025.

Key facts

This page summarizes Bialecki Andrew's Form 4 filing for Klaviyo, Inc. (KVYO).
6 reported transactions and 8 derivative rows are listed below.
Accepted by SEC: 16 May 2025, 20:59.

Change

Previous filing in this sequence was filed on 20 Sep 2023.
Current net transaction value: -$360,559,956.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001991099 Primary reporting owner

Bialecki Andrew

Relationship: Chief Executive Officer, Director, 10%+ Owner
Address: C/O KLAVIYO, INC., 125 SUMMER STREET, 6TH FLOOR, BOSTON
Signature: /s/ Landon Edmond, Attorney-in-Fact
Signature date: 16 May 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

KVYO transaction

Series A Common Stock

Conversion of derivative security

Transaction value: $0
Shares: +10,969,078
Change %
Price: $0.000000
Shares after: 10,969,078
Date: 14 May 2025
Ownership: Direct

KVYO transaction

Series A Common Stock

Sale

Transaction value: $360,827,821
Shares: -10,969,078
Change %: -100%
Price: $32.90
Shares after: 0
Date: 16 May 2025
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

KVYO transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value: $0
Shares: -15,829,184
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 14 May 2025
Ownership: Direct
Underlying class: Series B Common Stock
Underlying amount: 15,829,184
Exercise price: $0.0125
Footnotes: F2

KVYO transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value: $0
Shares: -5,600,000
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 14 May 2025
Ownership: Direct
Underlying class: Series B Common Stock
Underlying amount: 5,600,000
Exercise price: $0.0125
Footnotes: F2

KVYO transaction Derivative

Series B Common Stock

Options Exercise

Transaction value: $267,865
Shares: +21,429,184
Change %: +33%
Price: $0.0125
Shares after: 85,842,354
Date: 14 May 2025
Ownership: Direct
Underlying class: Series A Common Stock
Underlying amount: 21,429,184
Exercise price
Footnotes: F3, F4

KVYO transaction Derivative

Series B Common Stock

Conversion of derivative security

Transaction value: $0
Shares: -10,969,078
Change %: -13%
Price: $0.000000
Shares after: 74,873,276
Date: 14 May 2025
Ownership: Direct
Underlying class: Series A Common Stock
Underlying amount: 10,969,078
Exercise price
Footnotes: F3

KVYO holding Derivative

Series B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 11,945,830
Date: 14 May 2025
Ownership: By The Andrew P. Bialecki Grantor Retained Annuity Trust I of 2023
Underlying class: Series A Common Stock
Underlying amount: 11,945,830
Exercise price
Footnotes: F3, F4, F5

KVYO holding Derivative

Series B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 517,006
Date: 14 May 2025
Ownership: By The Elizabeth L. Bialecki Irrevocable GST Trust of 2023
Underlying class: Series A Common Stock
Underlying amount: 517,006
Exercise price
Footnotes: F3, F6

KVYO holding Derivative

Series B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 517,006
Date: 14 May 2025
Ownership: By The Andrew P. Bialecki Irrevocable GST Trust of 2023
Underlying class: Series A Common Stock
Underlying amount: 517,006
Exercise price
Footnotes: F3, F7

KVYO holding Derivative

Series B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 43,218
Date: 14 May 2025
Ownership: By spouse
Underlying class: Series A Common Stock
Underlying amount: 43,218
Exercise price
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 7 footnotes

Footnote F1

Represents shares of the Issuer's Series A Common Stock, par value $0.001 per share ("Series A Common Stock"), sold in an underwritten registered offering, the proceeds of which were used to satisfy taxes incurred in connection with stock option exercises.

Footnote F2

The shares underlying this option were fully vested and exercisable by the Reporting Person as of the date exercised.

Footnote F3

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 Series A Common Stock and will automatically convert into 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.

Footnote F4

Reflects 4,054,170 shares of Series B Common Stock previously transferred from the Andrew P. Bialecki Grantor Retained Annuity Trust I of 2023 to the Reporting Person.

Footnote F5

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.

Footnote F6

Shares held by the Elizabeth L. Bialecki Irrevocable GST Trust 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.

Footnote F7

Shares held by the Andrew P. Bialecki Irrevocable GST Trust of 2023, of which the Reporting Person's spouse 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.