{"filing":{"accession":"0001470831-26-000868","url":"/filing/0001470831-26-000868","form_type":"4","issuer_cik":"0001835830","issuer_name":"Klaviyo, Inc.","issuer_name_source":null,"issuer_ticker":"KVYO","issuer_url":"/issuer/0001835830","period_of_report":"2026-08-28","filed_date":"2026-09-01","acceptance_dt":"2026-09-01T20:16:27+00:00","acceptance_label":"2026-09-01 20:16 UTC","ingested_at":"2026-09-02T05:26:30.437746+00:00","ingested_label":"2026-09-02 05:26 UTC","schema_version":null,"source":"Layline","parse_status":"parsed","parse_ok":true,"edgar_url":"https://www.sec.gov/Archives/edgar/data/1835830/0001470831-26-000868-index.htm","day_url":"/filings/2026-09-01"},"owners":[{"owner_cik":"0001991399","owner_name":"Edmond Landon","url":"/insider/0001991399","anchor":"owner-0001991399","role":"Officer (Chief Legal Officer)","officer_title":"Chief Legal Officer","is_director":false,"is_officer":true,"is_ten_percent":false,"is_other":false,"filing_anchor":"/filing/0001470831-26-000868#owner-0001991399"}],"line_owners":[{"owner_name":"Edmond Landon","role":"Officer (Chief Legal Officer)"}],"transactions":[{"id":9303436,"accession":"0001470831-26-000868","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001470831-26-000868","line_url":"/filing/0001470831-26-000868#line-1","is_derivative":false,"issuer_cik":"0001835830","issuer_name":"Klaviyo, Inc.","issuer_ticker":"KVYO","issuer_name_source":null,"issuer_url":"/issuer/0001835830","owner_cik":"0001991399","owner_name":"Edmond Landon","owner_display_name":"Edmond Landon","owner_url":"/insider/0001991399","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Series A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":53473.0,"shares_display":"53,473","price_per_share":20.01,"price_display":"20.01","price_state":"stated","total_value":1069994.73,"total_display":"1,069,994.73","total_whole":"1,069,995","shares_owned_after":485969.0,"shares_owned_after_display":"485,969","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-08-28","filed_date":"2026-09-01","scope":"global","indirect_nature":null,"deemed_execution_date":null,"conversion_or_exercise_price":null,"exercise_date":null,"expiration_date":null,"underlying_security_title":null,"underlying_shares":null,"equity_swap_involved":null,"footnote_ids":null},{"id":9303435,"accession":"0001470831-26-000868","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001470831-26-000868","line_url":"/filing/0001470831-26-000868#line-2","is_derivative":false,"issuer_cik":"0001835830","issuer_name":"Klaviyo, Inc.","issuer_ticker":"KVYO","issuer_name_source":null,"issuer_url":"/issuer/0001835830","owner_cik":"0001991399","owner_name":"Edmond Landon","owner_display_name":"Edmond Landon","owner_url":"/insider/0001991399","role":"Officer (Chief Legal Officer)","role_mark":"O","role_mark_label":"Officer (Chief Legal Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Legal Officer","security_title":"Series A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8103.0,"shares_display":"8,103","price_per_share":20.44,"price_display":"20.44","price_state":"stated","total_value":165625.32,"total_display":"165,625.32","total_whole":"165,625","shares_owned_after":477866.0,"shares_owned_after_display":"477,866","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-08-31","filed_date":"2026-09-01","scope":"global","indirect_nature":null,"deemed_execution_date":null,"conversion_or_exercise_price":null,"exercise_date":null,"expiration_date":null,"underlying_security_title":null,"underlying_shares":null,"equity_swap_involved":null,"footnote_ids":null}],"n_transactions":2,"line_constants":{"security_title":"Series A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true},"provenance":{"source_pass":"Layline","parse_status":"parsed","schema_version":null,"retrieved_at":"2026-09-02T05:26:30.437746+00:00","retrieved_label":"2026-09-02 05:26 UTC","primary_document":"https://www.sec.gov/Archives/edgar/data/1835830/0001470831-26-000868-index.htm","accepted_at":"2026-09-01T20:16:27+00:00","accepted_label":"2026-09-01 20:16 UTC"},"related":[],"related_rule":"Other filings held for the same issuer and the same period of report. This is a heuristic match, not an authoritative amendment link: the store holds no 4/A-to-original relation and the catalog does not invent one.","canonical_url":"https://ebomi.com/filing/0001470831-26-000868","retrieved_at":"2026-09-02T08:17:54+00:00","coverage":{"filings":1506293,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-09-01","last_ingest":"2026-09-02T05:26:30.437746+00:00","counts_are":{"filings":"estimate","transactions":"estimate","issuers":"estimate","insiders":"estimate"},"source":"SEC EDGAR Form 4 filings, parsed by ebomi","fault":false},"license":{"underlying_records":"US SEC filings are public records of the United States government and are not subject to copyright. The transactional facts in them are not ours to license.","this_presentation":"The parsing, normalisation, curation, and presentation are ebomi's own work.","grant":"undecided","grant_note":"The open licence for ebomi's own layer is an open owner decision (SPEC-20260731T1159Z open question 3: CC BY 4.0 or CC0 with a citation request). Until it is taken, no grant is asserted here.","citation_request":"Balogh, A. Insider trading. Scientific Data 10, 237 (2023)","url":"https://ebomi.com/license"},"fair_use":{"policy":"These JSON endpoints are open and unauthenticated. Please read them at a human pace, identify your client in the User-Agent header, and use the published dataset for bulk work rather than crawling page by page.","bulk_alternative":"doi:10.1038/s41597-023-02147-6"}}