X0508 4 2026-01-29 false 0001835830 Klaviyo, Inc. KVYO 0001993562 Shopify Strategic Holdings 3 LLC 103 FOULK ROAD, SUITE 218-A WILMINGTON DE 19803 false false true false 0001594805 SHOPIFY INC. 151 O'CONNOR STREET GROUND FLOOR OTTAWA A6 K2P 2L8 ONTARIO, CANADA false false true false false Warrants to Purchase Series B Common Stock (Right to Buy) 0.01 2026-01-29 4 X false 344383 0 D 2032-07-28 Series B Common Stock 344383 2066293 D Series B Common Stock 2026-01-29 4 X false 344383 0.01 A Series A Common Stock 344383 16628727 D 25% of the shares subject to the warrants vested on July 28, 2022, and the remaining shares vest quarterly in equal amounts through July 28, 2027. Notwithstanding the foregoing, in connection with the Issuer's initial public offering ("IPO"), 25% of the total number of shares subject to the warrants vested immediately prior to the completion of the IPO. Reflects securities held directly by Shopify Strategic Holdings 3 LLC, a wholly-owned subsidiary of Shopify Inc. ("Shopify"). Shopify is an indirect beneficial owner and disclaims beneficial ownership except to the extent of its pecuniary interest therein. Each share of Series B Common Stock is convertible at any time at the option of the holder into one share of Series A Common Stock of the Issuer, 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. SHOPIFY STRATEGIC HOLDINGS 3 LLC, By: /s/ Jason Kilpela, Director 2026-01-30 SHOPIFY INC, By: /s/ Michael L. Johnson, Corporate Secretary 2026-01-30