0001950047-24-001570.txt : 20240229 0001950047-24-001570.hdr.sgml : 20240229 20240229162845 ACCESSION NUMBER: 0001950047-24-001570 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20240229 DATE AS OF CHANGE: 20240229 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: Klaviyo, Inc. CENTRAL INDEX KEY: 0001835830 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-PREPACKAGED SOFTWARE [7372] ORGANIZATION NAME: 06 Technology IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 001-41806 FILM NUMBER: 24704178 BUSINESS ADDRESS: STREET 1: 125 SUMMER STREET, FLOOR 6 CITY: BOSTON STATE: MA ZIP: 02110 BUSINESS PHONE: 800-338-1744 MAIL ADDRESS: STREET 1: 125 SUMMER STREET, FLOOR 6 CITY: BOSTON STATE: MA ZIP: 02110 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: Weisman Tony CENTRAL INDEX KEY: 0001716921 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: C/O DUNKIN' BRANDS, INC. STREET 2: 130 ROYALL STREET CITY: CANTON STATE: MA ZIP: 02021 144 1 primary_doc.xml 144 0001716921 XXXXXXXX LIVE 0001835830 KLAVIYO, INC. 001-41806 125 Summer Street 6th Floor Boston MA 02110 617-213-1788 TONY G WEISMAN Director Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

33333 865648.01 64329482 02/29/2024 NYSE Common 03/01/2022 Restricted Stock Units Issuer N 33333 03/01/2022 Services Rendered Y 02/29/2024 /s/ Tony G Weisman