Transaction · 0001470831-26-000022

Bialecki Andrew

Bialecki Andrew, CEO, reported a transaction classified as C at Klaviyo, Inc. involving 16649.000000 shares. Reported holdings after the transaction were 16649.000000 shares. The stored filing text includes a detected 10b5-1 reference.

CSEC transaction code CCEO

KVYOKlaviyo, Inc.

Filing timeJan 08

Trade dateJan 07, 2026

Filing · SECView on SEC

InsiderProfile

% of reported position tradedUnavailableCalculated only for code-P purchases and code-S sales.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows

Price at filing

$29.32

Pre-filing

1mo ago -4.0%1w ago -4.0%1d ago +0.0%

Returns since

7d +0.0%30d -23.1%90d -33.7%180d -41.3%1y

KVYO price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards

KVYO since 2026-01-08Filed 262 days ago · 30 days of pre-filing context shaded

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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative

Type: C
Identifier: 0001470831-26-000022
Transaction date: Jan 07, 2026
Shares: 16.6k sh
Estimated value: —
Holdings after: 16.6k sh

Filing warnings

Notes recorded with this filing

1 warning

missing priceThe filing did not provide a usable price per share.

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M

Direct Ownership Large Holdings Increase 10b5-1 Detected

-8score

Filing-only score

-8

Compact filing score computed from stored Form 4 facts. Version v1.

Mixed or weak signal

This filing has a negative filing-only score. It may be less informative as an insider-activity signal and needs extra context.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Co-Chief Executive Officer

Officer YesDirector Yes10% YesOther No

Footnotes & amended

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 C…
F3
The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.545 to $29.54 per share. The Reporting Person undertakes to provide…
F4
The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.42 to $28.54 per share. The Reporting Person undertakes to provide…
F5
The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $30.00 to $30.06 per share. The Reporting Person undertakes to provid…
F6
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…
F7
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…
F8
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…

Original filing · 0001470831-26-000022

Related transactions

0 other filings

Same reporting owner

Recent company activity

0 recent txs

KVYO