{"transactions":[{"id":673546,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-08-27T21:29:08.000Z","date":"2026-08-26","kind":"grant","planned":false,"acquired":true,"shares":4458,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each time-based restricted stock unit (\"RSU\") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents the grant of RSUs under the Issuer's 2019 Equity Incentive Plan, as amended, and the Amended and Restated Non-Employee Director Compensation Policy. 100% of the RSUs granted will vest on the earlier of the one year anniversary of the date of grant (August 26, 2027) and the date of the Issuer's 2027 Annual Meeting of Stockholders, subject to the Reporting Person's continued service as a director of the Issuer on the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each time-based restricted stock unit (\"RSU\") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."}],"balance_after":4458,"derivative":{"underlying":"Common Stock","underlying_shares":4458},"source":{"system":"sec-edgar","filing":"0001639368-26-000004","document":"wk-form4_1787866146.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000163936826000004/wk-form4_1787866146.xml","form_type":"4"}},{"id":677086,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-08-24T21:15:30.000Z","date":"2026-08-20","kind":"exercise","planned":false,"acquired":false,"shares":4111,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each time-based restricted stock unit (\"RSU\") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents the vesting of RSUs granted on August 20, 2025 under the Issuer's 2019 Equity Incentive Plan, as amended, and the Amended and Restated Non-Employee Director Compensation Policy. 100% of these RSUs vested on August 20, 2026, which was the earlier of the one-year anniversary of the date of grant (August 20, 2026) and the date of the Issuer's 2026 Annual Meeting of Stockholders (scheduled to be held on August 26, 2026)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each time-based restricted stock unit (\"RSU\") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":4111},"source":{"system":"sec-edgar","filing":"0001639368-26-000002","document":"wk-form4_1787606127.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000163936826000002/wk-form4_1787606127.xml","form_type":"4"}},{"id":677085,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-08-24T21:15:30.000Z","date":"2026-08-20","kind":"exercise","planned":false,"acquired":true,"shares":4111,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Each time-based restricted stock unit (\"RSU\") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each time-based restricted stock unit (\"RSU\") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."}],"balance_after":24982,"source":{"system":"sec-edgar","filing":"0001639368-26-000002","document":"wk-form4_1787606127.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000163936826000002/wk-form4_1787606127.xml","form_type":"4"}},{"id":964276,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-12-17T22:21:20.000Z","date":"2025-12-15","kind":"sale","planned":true,"acquired":false,"shares":3191,"price":29.01,"value":92570.91,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.83 to $29.33 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Consists of (i) 150,495 shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and (ii) 283,799 unvested restricted stock units awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":434294,"source":{"system":"sec-edgar","filing":"0001470831-25-000427","document":"wk-form4_1766010077.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000427/wk-form4_1766010077.xml","form_type":"4"}},{"id":964275,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-12-17T22:21:20.000Z","date":"2025-12-15","kind":"sale","planned":true,"acquired":false,"shares":3913,"price":29.81,"value":116646.53,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $29.38 to  $30.35 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":437485,"source":{"system":"sec-edgar","filing":"0001470831-25-000427","document":"wk-form4_1766010077.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000427/wk-form4_1766010077.xml","form_type":"4"}},{"id":995151,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2025-11-18T21:12:39.000Z","date":"2025-11-17","kind":"exercise","planned":true,"acquired":false,"shares":28457,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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 and will automatically convert into one share of 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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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 and will automatically convert into one share of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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 and will automatically convert into one share of 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"Consists of 359,184 unvested RSUs awarded under the Issuer's 2015 Stock Incentive Plan, each representing the contingent right to receive one share of Series B Common Stock upon vesting and settlement."}],"balance_after":359184,"derivative":{"underlying":"Series A Common Stock","underlying_shares":28457},"source":{"system":"sec-edgar","filing":"0001470831-25-000338","document":"wk-form4_1763500355.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000338/wk-form4_1763500355.xml","form_type":"4"}},{"id":995150,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2025-11-18T21:12:39.000Z","date":"2025-11-15","kind":"exercise","planned":true,"acquired":false,"shares":22855,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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 and will automatically convert into one share of 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."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents 22,855 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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 and will automatically convert into one share of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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 and will automatically convert into one share of 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."}],"balance_after":387641,"derivative":{"underlying":"Series A Common Stock","underlying_shares":22855},"source":{"system":"sec-edgar","filing":"0001470831-25-000338","document":"wk-form4_1763500355.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000338/wk-form4_1763500355.xml","form_type":"4"}},{"id":995149,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-11-18T21:12:39.000Z","date":"2025-11-17","kind":"sale","planned":true,"acquired":false,"shares":7104,"price":27.39,"value":194578.56,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $26.96 to $27.86 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Consists of (i) 157,599 shares of Series A Common Stock and (ii) 283,799 unvested RSUs awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":441398,"source":{"system":"sec-edgar","filing":"0001470831-25-000338","document":"wk-form4_1763500355.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000338/wk-form4_1763500355.xml","form_type":"4"}},{"id":995148,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-11-18T21:12:39.000Z","date":"2025-11-17","kind":"exercise","planned":true,"acquired":true,"shares":28457,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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 and will automatically convert into one share of 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."}],"balance_after":448502,"source":{"system":"sec-edgar","filing":"0001470831-25-000338","document":"wk-form4_1763500355.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000338/wk-form4_1763500355.xml","form_type":"4"}},{"id":995147,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-11-18T21:12:39.000Z","date":"2025-11-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":34326,"price":28.61,"value":982066.86,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents shares of Series A Common Stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs."}],"balance_after":420045,"source":{"system":"sec-edgar","filing":"0001470831-25-000338","document":"wk-form4_1763500355.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000338/wk-form4_1763500355.xml","form_type":"4"}},{"id":995146,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-11-18T21:12:39.000Z","date":"2025-11-15","kind":"exercise","planned":true,"acquired":true,"shares":22855,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents 22,855 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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 and will automatically convert into one share of 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."}],"balance_after":454371,"source":{"system":"sec-edgar","filing":"0001470831-25-000338","document":"wk-form4_1763500355.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000338/wk-form4_1763500355.xml","form_type":"4"}},{"id":1017443,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-10-16T20:11:47.000Z","date":"2025-10-15","kind":"sale","planned":true,"acquired":false,"shares":7105,"price":24.35,"value":173006.75,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $23.87 to $24.85 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Consists of (i) 121,965 shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and (ii) 309,551 unvested restricted stock units awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":431516,"source":{"system":"sec-edgar","filing":"0001470831-25-000262","document":"wk-form4_1760645504.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000262/wk-form4_1760645504.xml","form_type":"4"}},{"id":1037197,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-09-17T20:15:30.000Z","date":"2025-09-15","kind":"sale","planned":true,"acquired":false,"shares":200,"price":31.24,"value":6248.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Consists of (i) 129,070 shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and (ii) 309,551 unvested restricted stock units awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":438621,"source":{"system":"sec-edgar","filing":"0001470831-25-000210","document":"wk-form4_1758140127.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000210/wk-form4_1758140127.xml","form_type":"4"}},{"id":1037196,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-09-17T20:15:30.000Z","date":"2025-09-15","kind":"sale","planned":true,"acquired":false,"shares":6905,"price":31.9,"value":220269.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.43 to $32.27 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":438821,"source":{"system":"sec-edgar","filing":"0001470831-25-000210","document":"wk-form4_1758140127.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000210/wk-form4_1758140127.xml","form_type":"4"}},{"id":1059028,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-08-21T20:07:55.000Z","date":"2025-08-20","kind":"grant","planned":false,"acquired":true,"shares":4111,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents the grant of RSUs. 100% of the RSUs granted will vest on the earlier of the one year anniversary of the date of grant (August 20, 2026) and the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continued service as a director of the Issuer on the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."}],"balance_after":4111,"derivative":{"underlying":"Common Stock","underlying_shares":4111},"source":{"system":"sec-edgar","filing":"0001773383-25-000167","document":"wk-form4_1755806870.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000177338325000167/wk-form4_1755806870.xml","form_type":"4"}},{"id":1059027,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-08-21T20:07:55.000Z","date":"2025-08-20","kind":"exercise","planned":false,"acquired":false,"shares":3981,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"As previously reported on August 27, 2024, these RSUs were granted on August 23, 2024. 100% of the RSUs granted vested on August 20, 2025, which was the earlier of the one year anniversary of the date of grant (August 23, 2025) and the date of the Issuer's 2025 Annual Meeting of Stockholders (which was held on August 20, 2025)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":3981},"source":{"system":"sec-edgar","filing":"0001773383-25-000167","document":"wk-form4_1755806870.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000177338325000167/wk-form4_1755806870.xml","form_type":"4"}},{"id":1059026,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-08-21T20:07:55.000Z","date":"2025-08-20","kind":"exercise","planned":false,"acquired":true,"shares":3981,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."}],"balance_after":20871,"source":{"system":"sec-edgar","filing":"0001773383-25-000167","document":"wk-form4_1755806870.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000177338325000167/wk-form4_1755806870.xml","form_type":"4"}},{"id":1061185,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2025-08-20T00:47:43.000Z","date":"2025-08-18","kind":"exercise","planned":true,"acquired":false,"shares":28457,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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 and will automatically convert into one share of 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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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 and will automatically convert into one share of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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 and will automatically convert into one share of 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"Consists of 410,496 unvested RSUs awarded under the Issuer's 2015 Stock Incentive Plan, each representing the contingent right to receive one share of Series B Common Stock upon vesting and settlement."}],"balance_after":410496,"derivative":{"underlying":"Series A Common Stock","underlying_shares":28457},"source":{"system":"sec-edgar","filing":"0001470831-25-000140","document":"wk-form4_1755650858.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000140/wk-form4_1755650858.xml","form_type":"4"}},{"id":1061184,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2025-08-20T00:47:43.000Z","date":"2025-08-15","kind":"exercise","planned":true,"acquired":false,"shares":22855,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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 and will automatically convert into one share of 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."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents 22,855 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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 and will automatically convert into one share of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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 and will automatically convert into one share of 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."}],"balance_after":438953,"derivative":{"underlying":"Series A Common Stock","underlying_shares":22855},"source":{"system":"sec-edgar","filing":"0001470831-25-000140","document":"wk-form4_1755650858.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000140/wk-form4_1755650858.xml","form_type":"4"}},{"id":1061183,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-08-20T00:47:43.000Z","date":"2025-08-18","kind":"sale","planned":true,"acquired":false,"shares":7105,"price":31.46,"value":223523.3,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.20 to $31.77 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Consists of (i) 136,175 shares of Series A Common Stock and (ii) 309,551 unvested RSUs awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":445726,"source":{"system":"sec-edgar","filing":"0001470831-25-000140","document":"wk-form4_1755650858.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000140/wk-form4_1755650858.xml","form_type":"4"}},{"id":1061182,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-08-20T00:47:43.000Z","date":"2025-08-18","kind":"exercise","planned":true,"acquired":true,"shares":28457,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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 and will automatically convert into one share of 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."}],"balance_after":452831,"source":{"system":"sec-edgar","filing":"0001470831-25-000140","document":"wk-form4_1755650858.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000140/wk-form4_1755650858.xml","form_type":"4"}},{"id":1061181,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-08-20T00:47:43.000Z","date":"2025-08-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":34326,"price":31.43,"value":1078866.18,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents shares of Series A Common Stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs."}],"balance_after":424374,"source":{"system":"sec-edgar","filing":"0001470831-25-000140","document":"wk-form4_1755650858.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000140/wk-form4_1755650858.xml","form_type":"4"}},{"id":1061180,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-08-20T00:47:43.000Z","date":"2025-08-15","kind":"exercise","planned":true,"acquired":true,"shares":22855,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents 22,855 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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 and will automatically convert into one share of 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."}],"balance_after":458700,"source":{"system":"sec-edgar","filing":"0001470831-25-000140","document":"wk-form4_1755650858.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000140/wk-form4_1755650858.xml","form_type":"4"}},{"id":1086350,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-07-16T21:59:31.000Z","date":"2025-07-15","kind":"sale","planned":true,"acquired":false,"shares":7079,"price":31.56,"value":223413.24,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.22 to $31.96 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Consists of (i) 100,542 shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and (ii) 335,303 unvested restricted stock units awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":435845,"source":{"system":"sec-edgar","filing":"0001470831-25-000093","document":"wk-form4_1752703165.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000147083125000093/wk-form4_1752703165.xml","form_type":"4"}},{"id":1086352,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-07-16T20:14:42.000Z","date":"2025-07-15","kind":"exercise","planned":false,"acquired":false,"shares":431,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"As previously reported on July 19, 2021, these RSUs were granted on July 15, 2021. 25% of the RSUs granted vested on July 15, 2022 and the balance of the RSUs vested in equal quarterly installments thereafter until fully vested on July 15, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":431},"source":{"system":"sec-edgar","filing":"0001773383-25-000144","document":"wk-form4_1752696874.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000177338325000144/wk-form4_1752696874.xml","form_type":"4"}},{"id":1086351,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-07-16T20:14:42.000Z","date":"2025-07-15","kind":"exercise","planned":false,"acquired":true,"shares":431,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs do not expire. They either vest or are cancelled prior to the vesting date."}],"balance_after":16890,"source":{"system":"sec-edgar","filing":"0001773383-25-000144","document":"wk-form4_1752696874.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000177338325000144/wk-form4_1752696874.xml","form_type":"4"}},{"id":1107455,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-06-17T20:33:24.000Z","date":"2025-06-16","kind":"sale","planned":true,"acquired":false,"shares":300,"price":33.82,"value":10146.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $33.81 to $33.85 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Consists of (i) 107,621 shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and (ii) 335,303 unvested restricted stock units awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":442924,"source":{"system":"sec-edgar","filing":"0001835830-25-000072","document":"wk-form4_1750192396.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000072/wk-form4_1750192396.xml","form_type":"4"}},{"id":1107454,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-06-17T20:33:24.000Z","date":"2025-06-16","kind":"sale","planned":true,"acquired":false,"shares":6779,"price":34.59,"value":234485.61,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $33.93 to $34.92 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":443224,"source":{"system":"sec-edgar","filing":"0001835830-25-000072","document":"wk-form4_1750192396.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000072/wk-form4_1750192396.xml","form_type":"4"}},{"id":1144754,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2025-05-17T00:46:13.000Z","date":"2025-05-15","kind":"exercise","planned":true,"acquired":false,"shares":28355,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"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 and will automatically convert into one share of 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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"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 and will automatically convert into one share of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"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 and will automatically convert into one share of 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F9","text":"Consists of 461,808 unvested RSUs awarded under the Issuer's 2015 Stock Incentive Plan, each representing the contingent right to receive one share of Series B Common Stock upon vesting and settlement."}],"balance_after":461808,"derivative":{"underlying":"Series A Common Stock","underlying_shares":28355},"source":{"system":"sec-edgar","filing":"0001835830-25-000057","document":"wk-form4_1747442766.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000057/wk-form4_1747442766.xml","form_type":"4"}},{"id":1144753,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2025-05-17T00:46:13.000Z","date":"2025-05-15","kind":"exercise","planned":true,"acquired":false,"shares":22957,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"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 and will automatically convert into one share of 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."},{"field":"kind","element":"transactionCoding","label":"F4","text":"Represents 22,957 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"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 and will automatically convert into one share of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"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 and will automatically convert into one share of 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."}],"balance_after":490163,"derivative":{"underlying":"Series A Common Stock","underlying_shares":22957},"source":{"system":"sec-edgar","filing":"0001835830-25-000057","document":"wk-form4_1747442766.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000057/wk-form4_1747442766.xml","form_type":"4"}},{"id":1144752,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-05-17T00:46:13.000Z","date":"2025-05-16","kind":"sale","planned":true,"acquired":false,"shares":7079,"price":34.86,"value":246773.94,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024"},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.50 to $35.37 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F8","text":"Consists of (i) 114,700 shares of Series A Common Stock and (ii) 335,303 unvested RSUs awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":450003,"source":{"system":"sec-edgar","filing":"0001835830-25-000057","document":"wk-form4_1747442766.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000057/wk-form4_1747442766.xml","form_type":"4"}},{"id":1144751,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-05-17T00:46:13.000Z","date":"2025-05-15","kind":"exercise","planned":true,"acquired":true,"shares":28355,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"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 and will automatically convert into one share of 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."}],"balance_after":457082,"source":{"system":"sec-edgar","filing":"0001835830-25-000057","document":"wk-form4_1747442766.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000057/wk-form4_1747442766.xml","form_type":"4"}},{"id":1144750,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-05-17T00:46:13.000Z","date":"2025-05-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":34480,"price":34.9,"value":1203352.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"Represents shares of Series A Common Stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs."}],"balance_after":428727,"source":{"system":"sec-edgar","filing":"0001835830-25-000057","document":"wk-form4_1747442766.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000057/wk-form4_1747442766.xml","form_type":"4"}},{"id":1144749,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-05-17T00:46:13.000Z","date":"2025-05-15","kind":"exercise","planned":true,"acquired":true,"shares":22957,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"Represents 22,957 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"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 and will automatically convert into one share of 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."}],"balance_after":463207,"source":{"system":"sec-edgar","filing":"0001835830-25-000057","document":"wk-form4_1747442766.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000057/wk-form4_1747442766.xml","form_type":"4"}},{"id":1144748,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-05-17T00:46:13.000Z","date":"2025-05-15","kind":"sale","planned":true,"acquired":false,"shares":500,"price":34.19,"value":17095.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024"},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $33.89 to $34.47 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":440250,"source":{"system":"sec-edgar","filing":"0001835830-25-000057","document":"wk-form4_1747442766.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000057/wk-form4_1747442766.xml","form_type":"4"}},{"id":1144747,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-05-17T00:46:13.000Z","date":"2025-05-15","kind":"sale","planned":true,"acquired":false,"shares":6560,"price":35.06,"value":229993.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024"},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.65 to $35.49 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":440750,"source":{"system":"sec-edgar","filing":"0001835830-25-000057","document":"wk-form4_1747442766.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000057/wk-form4_1747442766.xml","form_type":"4"}},{"id":1170837,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-04-16T21:14:49.000Z","date":"2025-04-15","kind":"sale","planned":true,"acquired":false,"shares":7060,"price":26.66,"value":188219.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $26.45 to $27.00 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Consists of (i)  86,255 shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and (ii) 361,055 unvested restricted stock units awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":447310,"source":{"system":"sec-edgar","filing":"0001835830-25-000035","document":"wk-form4_1744838083.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000035/wk-form4_1744838083.xml","form_type":"4"}},{"id":1198571,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-03-18T22:52:03.000Z","date":"2025-03-17","kind":"grant","planned":false,"acquired":true,"shares":208116,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units (\"RSUs\") awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), upon vesting and settlement. The RSUs vest as follows: (i) 50% of the RSUs will vest in eight equal quarterly installments, with the first such installment vesting on May 15, 2025, and (ii) thereafter the remaining 50% of the RSUs will vest in four equal quarterly installments, subject to the Reporting Person's continued service on each such vesting date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 93,315 shares of Series A Common Stock and (ii) 361,055 unvested RSUs awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":454370,"source":{"system":"sec-edgar","filing":"0001835830-25-000030","document":"wk-form4_1742338314.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000030/wk-form4_1742338314.xml","form_type":"4"}},{"id":1216836,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-03-08T00:27:21.000Z","date":"2025-03-07","kind":"sale","planned":true,"acquired":false,"shares":14603,"price":34.24,"value":500006.72,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $33.89 to $34.56 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Consists of (i) 93,315 shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and (ii) 152,939 unvested restricted stock units awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":246254,"source":{"system":"sec-edgar","filing":"0001835830-25-000027","document":"wk-form4_1741393635.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000027/wk-form4_1741393635.xml","form_type":"4"}},{"id":1216835,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-03-08T00:27:21.000Z","date":"2025-03-07","kind":"sale","planned":true,"acquired":false,"shares":11699,"price":34.83,"value":407476.17,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.57 to $35.56 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":260857,"source":{"system":"sec-edgar","filing":"0001835830-25-000027","document":"wk-form4_1741393635.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000027/wk-form4_1741393635.xml","form_type":"4"}},{"id":1216834,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-03-08T00:27:21.000Z","date":"2025-03-07","kind":"sale","planned":true,"acquired":false,"shares":5528,"price":36,"value":199008.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $35.63 to $36.59 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":272556,"source":{"system":"sec-edgar","filing":"0001835830-25-000027","document":"wk-form4_1741393635.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000027/wk-form4_1741393635.xml","form_type":"4"}},{"id":1216833,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-03-08T00:27:21.000Z","date":"2025-03-07","kind":"sale","planned":true,"acquired":false,"shares":4880,"price":37.18,"value":181438.4,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $36.61 to $37.60 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":278084,"source":{"system":"sec-edgar","filing":"0001835830-25-000027","document":"wk-form4_1741393635.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000027/wk-form4_1741393635.xml","form_type":"4"}},{"id":1258599,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2025-02-19T22:49:11.000Z","date":"2025-02-15","kind":"exercise","planned":false,"acquired":false,"shares":28264,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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 and will automatically convert into shares of 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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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 and will automatically convert into shares of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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 and will automatically convert into shares of 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Consists of 513,120 unvested RSUs awarded under the Issuer's 2015 Stock Incentive Plan, each representing the contingent right to receive one share of Series B Common Stock upon vesting and settlement."}],"balance_after":513120,"derivative":{"underlying":"Series A Common Stock","underlying_shares":28264},"source":{"system":"sec-edgar","filing":"0001835830-25-000020","document":"wk-form4_1740005345.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000020/wk-form4_1740005345.xml","form_type":"4"}},{"id":1258598,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2025-02-19T22:49:11.000Z","date":"2025-02-15","kind":"exercise","planned":false,"acquired":false,"shares":23048,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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 and will automatically convert into shares of 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."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents 23,048 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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 and will automatically convert into shares of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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 and will automatically convert into shares of 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."}],"balance_after":541384,"derivative":{"underlying":"Series A Common Stock","underlying_shares":23048},"source":{"system":"sec-edgar","filing":"0001835830-25-000020","document":"wk-form4_1740005345.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000020/wk-form4_1740005345.xml","form_type":"4"}},{"id":1258597,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-02-19T22:49:11.000Z","date":"2025-02-15","kind":"exercise","planned":false,"acquired":true,"shares":28264,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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 and will automatically convert into shares of 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Consists of (i) 130,025 shares of Series A Common Stock and (ii) 152,939 unvested RSUs awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":282964,"source":{"system":"sec-edgar","filing":"0001835830-25-000020","document":"wk-form4_1740005345.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000020/wk-form4_1740005345.xml","form_type":"4"}},{"id":1258596,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-02-19T22:49:11.000Z","date":"2025-02-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":28751,"price":47,"value":1351297.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents shares of Series A Common Stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs."}],"balance_after":254700,"source":{"system":"sec-edgar","filing":"0001835830-25-000020","document":"wk-form4_1740005345.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000020/wk-form4_1740005345.xml","form_type":"4"}},{"id":1258595,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-02-19T22:49:11.000Z","date":"2025-02-15","kind":"exercise","planned":false,"acquired":true,"shares":23048,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents 23,048 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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 and will automatically convert into shares of 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."}],"balance_after":283451,"source":{"system":"sec-edgar","filing":"0001835830-25-000020","document":"wk-form4_1740005345.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000020/wk-form4_1740005345.xml","form_type":"4"}},{"id":1299654,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2025-01-17T21:09:36.000Z","date":"2025-01-15","kind":"exercise","planned":true,"acquired":false,"shares":78154,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Consists of 564,432 unvested RSUs awarded under the Issuer's 2015 Stock Incentive Plan, each representing the contingent right to receive one share of Series B Common Stock upon vesting and settlement."}],"balance_after":564432,"derivative":{"underlying":"Series A Common Stock","underlying_shares":78154},"source":{"system":"sec-edgar","filing":"0001835830-25-000005","document":"wk-form4_1737148168.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000005/wk-form4_1737148168.xml","form_type":"4"}},{"id":1299653,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-01-17T21:09:36.000Z","date":"2025-01-15","kind":"sale","planned":true,"acquired":false,"shares":4536,"price":40.04,"value":181621.44,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $39.53 to $40.48 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Consists of (i) 94,719 shares of Series A Common Stock and (ii) 165,684 unvested restricted stock units (\"RSUs\") awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":260403,"source":{"system":"sec-edgar","filing":"0001835830-25-000005","document":"wk-form4_1737148168.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000005/wk-form4_1737148168.xml","form_type":"4"}},{"id":1299652,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2025-01-17T21:09:36.000Z","date":"2025-01-15","kind":"exercise","planned":true,"acquired":true,"shares":78154,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."}],"balance_after":264939,"source":{"system":"sec-edgar","filing":"0001835830-25-000005","document":"wk-form4_1737148168.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583025000005/wk-form4_1737148168.xml","form_type":"4"}},{"id":1326209,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2024-12-18T21:38:41.000Z","date":"2024-12-16","kind":"exercise","planned":true,"acquired":false,"shares":4536,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."},{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"Consists of (i) 78,154 shares of Series B Common Stock and (ii) 564,432 unvested RSUs awarded under the Issuer's 2015 Stock Incentive Plan, each representing the contingent right to receive one share of Series B Common Stock upon vesting and settlement."}],"balance_after":642586,"derivative":{"underlying":"Series A Common Stock","underlying_shares":4536},"source":{"system":"sec-edgar","filing":"0001835830-24-000122","document":"wk-form4_1734557915.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000122/wk-form4_1734557915.xml","form_type":"4"}},{"id":1326208,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-12-18T21:38:41.000Z","date":"2024-12-16","kind":"sale","planned":true,"acquired":false,"shares":300,"price":39.49,"value":11847.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $39.42 to $39.54 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Consists of (i) 21,101 shares of Series A Common Stock and (ii) 165,684 unvested restricted stock units (\"RSUs\") awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":186785,"source":{"system":"sec-edgar","filing":"0001835830-24-000122","document":"wk-form4_1734557915.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000122/wk-form4_1734557915.xml","form_type":"4"}},{"id":1326207,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-12-18T21:38:41.000Z","date":"2024-12-16","kind":"sale","planned":true,"acquired":false,"shares":2800,"price":40.13,"value":112364.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $39.59  to $40.54 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":187085,"source":{"system":"sec-edgar","filing":"0001835830-24-000122","document":"wk-form4_1734557915.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000122/wk-form4_1734557915.xml","form_type":"4"}},{"id":1326206,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-12-18T21:38:41.000Z","date":"2024-12-16","kind":"sale","planned":true,"acquired":false,"shares":1436,"price":41.42,"value":59479.12,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $41.16 to $41.72 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":189885,"source":{"system":"sec-edgar","filing":"0001835830-24-000122","document":"wk-form4_1734557915.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000122/wk-form4_1734557915.xml","form_type":"4"}},{"id":1326205,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-12-18T21:38:41.000Z","date":"2024-12-16","kind":"exercise","planned":true,"acquired":true,"shares":4536,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."}],"balance_after":191321,"source":{"system":"sec-edgar","filing":"0001835830-24-000122","document":"wk-form4_1734557915.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000122/wk-form4_1734557915.xml","form_type":"4"}},{"id":1358333,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2024-11-19T23:12:52.000Z","date":"2024-11-18","kind":"exercise","planned":true,"acquired":false,"shares":4536,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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, 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."},{"field":"kind","element":"transactionCoding","label":"F4","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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, 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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, 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"Consists of (i) 82,690 shares of Series B Common Stock and (ii) 564,432 unvested RSUs awarded under the Issuer's 2015 Stock Incentive Plan, each representing the contingent right to receive one share of Series B Common Stock upon vesting and settlement."}],"balance_after":647122,"derivative":{"underlying":"Series A Common Stock","underlying_shares":4536},"source":{"system":"sec-edgar","filing":"0001835830-24-000114","document":"wk-form4_1732057965.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000114/wk-form4_1732057965.xml","form_type":"4"}},{"id":1358332,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2024-11-19T23:12:52.000Z","date":"2024-11-15","kind":"exercise","planned":true,"acquired":false,"shares":22957,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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, 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."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents 22,957 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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, 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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, 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."}],"balance_after":651658,"derivative":{"underlying":"Series A Common Stock","underlying_shares":22957},"source":{"system":"sec-edgar","filing":"0001835830-24-000114","document":"wk-form4_1732057965.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000114/wk-form4_1732057965.xml","form_type":"4"}},{"id":1358331,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-11-19T23:12:52.000Z","date":"2024-11-18","kind":"sale","planned":true,"acquired":false,"shares":4536,"price":34.56,"value":156764.16,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.21 to $34.88 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Consists of (i) 21,101 shares of Series A Common Stock and (ii) 165,684 unvested RSUs awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":186785,"source":{"system":"sec-edgar","filing":"0001835830-24-000114","document":"wk-form4_1732057965.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000114/wk-form4_1732057965.xml","form_type":"4"}},{"id":1358330,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-11-19T23:12:52.000Z","date":"2024-11-18","kind":"exercise","planned":true,"acquired":true,"shares":4536,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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, 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."}],"balance_after":191321,"source":{"system":"sec-edgar","filing":"0001835830-24-000114","document":"wk-form4_1732057965.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000114/wk-form4_1732057965.xml","form_type":"4"}},{"id":1358329,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-11-19T23:12:52.000Z","date":"2024-11-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":28660,"price":35.16,"value":1007685.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents shares of Series A Common Stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs."}],"balance_after":186785,"source":{"system":"sec-edgar","filing":"0001835830-24-000114","document":"wk-form4_1732057965.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000114/wk-form4_1732057965.xml","form_type":"4"}},{"id":1358328,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-11-19T23:12:52.000Z","date":"2024-11-15","kind":"exercise","planned":true,"acquired":true,"shares":22957,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents 22,957 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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, 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."}],"balance_after":215445,"source":{"system":"sec-edgar","filing":"0001835830-24-000114","document":"wk-form4_1732057965.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000114/wk-form4_1732057965.xml","form_type":"4"}},{"id":1384552,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2024-10-17T20:06:04.000Z","date":"2024-10-15","kind":"exercise","planned":true,"acquired":false,"shares":18114,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."},{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Consists of (i) 58,872 shares of Series B Common Stock and (ii) 615,743 unvested RSUs awarded under the Issuer's 2015 Stock Incentive Plan, each representing the contingent right to receive one share of Series B Common Stock upon vesting and settlement."}],"balance_after":674615,"derivative":{"underlying":"Series A Common Stock","underlying_shares":18114},"source":{"system":"sec-edgar","filing":"0001835830-24-000101","document":"wk-form4_1729195557.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000101/wk-form4_1729195557.xml","form_type":"4"}},{"id":1384551,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-10-17T20:06:04.000Z","date":"2024-10-15","kind":"sale","planned":true,"acquired":false,"shares":2000,"price":36.58,"value":73160.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $36.43 to $36.80 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Consists of (i) 14,059 shares of Series A Common Stock and (ii) 178,429 unvested restricted stock units (\"RSUs\") awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":192488,"source":{"system":"sec-edgar","filing":"0001835830-24-000101","document":"wk-form4_1729195557.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000101/wk-form4_1729195557.xml","form_type":"4"}},{"id":1384550,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-10-17T20:06:04.000Z","date":"2024-10-15","kind":"sale","planned":true,"acquired":false,"shares":16114,"price":37.27,"value":600568.78,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $36.81 to $37.80 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":194488,"source":{"system":"sec-edgar","filing":"0001835830-24-000101","document":"wk-form4_1729195557.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000101/wk-form4_1729195557.xml","form_type":"4"}},{"id":1384549,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-10-17T20:06:04.000Z","date":"2024-10-15","kind":"exercise","planned":true,"acquired":true,"shares":18114,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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 Common Stock, par value $0.001 per share (\"Series A Common Stock\"), and will automatically convert into shares of 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."}],"balance_after":210602,"source":{"system":"sec-edgar","filing":"0001835830-24-000101","document":"wk-form4_1729195557.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000101/wk-form4_1729195557.xml","form_type":"4"}},{"id":1403151,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2024-09-18T21:39:21.000Z","date":"2024-09-16","kind":"exercise","planned":true,"acquired":false,"shares":18114,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each share of 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, par value $0.001 per share (\"Series A Common Stock\"), of the Issuer, and will automatically convert into shares of 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."},{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each share of 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, par value $0.001 per share (\"Series A Common Stock\"), of the Issuer, and will automatically convert into shares of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each share of 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, par value $0.001 per share (\"Series A Common Stock\"), of the Issuer, and will automatically convert into shares of 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Consists of (i) 76,986 shares of Series B Common Stock and (ii) 615,743 unvested RSUs awarded under the Issuer's 2015 Stock Incentive Plan, each representing the contingent right to receive one share of Series B Common Stock upon vesting and settlement."}],"balance_after":692729,"derivative":{"underlying":"Series A Common Stock","underlying_shares":18114},"source":{"system":"sec-edgar","filing":"0001835830-24-000094","document":"wk-form4_1726695553.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000094/wk-form4_1726695553.xml","form_type":"4"}},{"id":1403150,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-09-18T21:39:21.000Z","date":"2024-09-16","kind":"sale","planned":true,"acquired":false,"shares":18114,"price":31.24,"value":565881.36,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $30.65 to $31.57 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Consists of (i) 14,059 shares of Series A Common Stock and (ii) 178,429 unvested restricted stock units (\"RSUs\") awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":192488,"source":{"system":"sec-edgar","filing":"0001835830-24-000094","document":"wk-form4_1726695553.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000094/wk-form4_1726695553.xml","form_type":"4"}},{"id":1403149,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-09-18T21:39:21.000Z","date":"2024-09-16","kind":"exercise","planned":true,"acquired":true,"shares":18114,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Each share of 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, par value $0.001 per share (\"Series A Common Stock\"), of the Issuer, and will automatically convert into shares of 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."}],"balance_after":210602,"source":{"system":"sec-edgar","filing":"0001835830-24-000094","document":"wk-form4_1726695553.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000094/wk-form4_1726695553.xml","form_type":"4"}},{"id":1421560,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-08-27T21:26:11.000Z","date":"2024-08-23","kind":"grant","planned":false,"acquired":true,"shares":3981,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Consists of Restricted Stock Units (\"RSUs\") granted on August 23, 2024 under the Dynatrace, Inc. 2019 Equity Incentive Plan and the Non-Employee Director Compensation Policy. Each RSU represents the right to receive one share of Common Stock on the earlier of the one-year anniversary of the date of grant or the date of the 2025 Annual Meeting of Stockholders."}],"balance_after":20871,"source":{"system":"sec-edgar","filing":"0001773383-24-000172","document":"wk-form4_1724793897.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000177338324000172/wk-form4_1724793897.xml","form_type":"4"}},{"id":1430884,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2024-08-16T23:46:18.000Z","date":"2024-08-16","kind":"exercise","planned":true,"acquired":false,"shares":18114,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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, and will automatically convert into shares of 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."},{"field":"kind","element":"transactionCoding","label":"F4","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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, and will automatically convert into shares of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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, and will automatically convert into shares of 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"Consists of (i) 95,100 shares of Series B Common Stock and (ii) 615,743 unvested RSUs awarded under the Issuer's 2015 Stock Incentive Plan, each representing the contingent right to receive one share of Series B Common Stock upon vesting and settlement."}],"balance_after":710843,"derivative":{"underlying":"Series A Common Stock","underlying_shares":18114},"source":{"system":"sec-edgar","filing":"0001835830-24-000086","document":"wk-form4_1723851972.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000086/wk-form4_1723851972.xml","form_type":"4"}},{"id":1430883,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series B Common Stock","published_at":"2024-08-16T23:46:18.000Z","date":"2024-08-15","kind":"exercise","planned":true,"acquired":false,"shares":92033,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"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, and will automatically convert into shares of 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."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents 92,033 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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, and will automatically convert into shares of 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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"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, and will automatically convert into shares of 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."}],"balance_after":728957,"derivative":{"underlying":"Series A Common Stock","underlying_shares":92033},"source":{"system":"sec-edgar","filing":"0001835830-24-000086","document":"wk-form4_1723851972.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000086/wk-form4_1723851972.xml","form_type":"4"}},{"id":1430882,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-08-16T23:46:18.000Z","date":"2024-08-16","kind":"sale","planned":true,"acquired":false,"shares":18114,"price":31.67,"value":573670.38,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.42 to $31.82 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Consists of (i) 14,059 shares of Series A Common Stock and (ii) 178,429 unvested RSUs awarded under the Issuer's 2023 Stock Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":192488,"source":{"system":"sec-edgar","filing":"0001835830-24-000086","document":"wk-form4_1723851972.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000086/wk-form4_1723851972.xml","form_type":"4"}},{"id":1430881,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-08-16T23:46:18.000Z","date":"2024-08-16","kind":"exercise","planned":true,"acquired":true,"shares":18114,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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, and will automatically convert into shares of 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."}],"balance_after":210602,"source":{"system":"sec-edgar","filing":"0001835830-24-000086","document":"wk-form4_1723851972.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000086/wk-form4_1723851972.xml","form_type":"4"}},{"id":1430880,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-08-16T23:46:18.000Z","date":"2024-08-15","kind":"tax_withholding","planned":true,"acquired":false,"shares":97748,"price":31.83,"value":3111318.84,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents shares of Series A Common Stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs."}],"balance_after":192488,"source":{"system":"sec-edgar","filing":"0001835830-24-000086","document":"wk-form4_1723851972.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000086/wk-form4_1723851972.xml","form_type":"4"}},{"id":1430879,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-08-16T23:46:18.000Z","date":"2024-08-15","kind":"exercise","planned":true,"acquired":true,"shares":92033,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents 92,033 shares of the Issuer's Series B Common Stock, par value $0.001 per share (\"Series B Common Stock\"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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, and will automatically convert into shares of 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."}],"balance_after":290236,"source":{"system":"sec-edgar","filing":"0001835830-24-000086","document":"wk-form4_1723851972.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000086/wk-form4_1723851972.xml","form_type":"4"}},{"id":1510437,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-05-17T20:36:59.000Z","date":"2024-05-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":5715,"price":24.8,"value":141732.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents 5,715 shares of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of restricted stock units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of (i) 7,029 shares of Series A Common Stock and (ii) 191,174 unvested RSUs awarded under the Issuer's 2023 Stock Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement."}],"balance_after":198203,"source":{"system":"sec-edgar","filing":"0001835830-24-000059","document":"wk-form4_1715978177.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000059/wk-form4_1715978177.xml","form_type":"4"}},{"id":1539700,"issuer":{"id":3775,"kind":"organization","name":"Klaviyo, Inc.","symbol":"KVYO"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Series A Common Stock","published_at":"2024-04-17T20:21:28.000Z","date":"2024-04-15","kind":"grant","planned":false,"acquired":true,"shares":203918,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units (\"RSUs\") awarded under the Issuer's 2023 Stock Incentive Plan, each representing the contingent right to receive one share of the Issuer's Series A Common Stock, par value $0.001 per share (\"Series A Common Stock\"), upon vesting and settlement. The RSUs vest as follows: (i) 50% of the RSUs will vest in eight equal quarterly installments, with the first such installment vesting on May 15, 2024, and (ii) thereafter the remaining 50% of the RSUs will vest in four equal quarterly installments, subject to the Reporting Person's continued service on each such vesting date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Consists of 203,918 unvested RSUs awarded under the Issuer's 2023 Stock Incentive Plan."}],"balance_after":203918,"source":{"system":"sec-edgar","filing":"0001835830-24-000034","document":"wk-form4_1713385279.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000183583024000034/wk-form4_1713385279.xml","form_type":"4"}},{"id":1795997,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-08-25T20:16:21.000Z","date":"2023-08-23","kind":"grant","planned":false,"acquired":true,"shares":4290,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Consists of Restricted Stock Units (\"RSUs\") granted on August 23, 2023 under the Dynatrace, Inc. 2019 Equity Incentive Plan and the Non-Employee Director Compensation Policy. Each RSU represents the right to receive one share of Common Stock on the earlier of the one-year anniversary of the date of grant or the date of the 2024 Annual Meeting of Stockholders."}],"balance_after":16890,"source":{"system":"sec-edgar","filing":"0001773383-23-000160","document":"wf-form4_169299455960774.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000177338323000160/wf-form4_169299455960774.xml","form_type":"4"}},{"id":2172601,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-08-26T20:25:01.000Z","date":"2022-08-24","kind":"grant","acquired":true,"shares":5190,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Consists of Restricted Stock Units (\"RSUs\") granted on August 24, 2022 under the Dynatrace, Inc. 2019 Equity Incentive Plan and the Non-Employee Director Compensation Policy.  Each RSU represents the right to receive one share of Common Stock on the earlier of the one-year anniversary of the date of grant or on the date of the 2023 Annual Meeting of Stockholders."}],"balance_after":12600,"source":{"system":"sec-edgar","filing":"0001773383-22-000106","document":"wf-form4_166154548334934.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000177338322000106/wf-form4_166154548334934.xml","form_type":"4"}},{"id":2586181,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-08-30T20:18:52.000Z","date":"2021-08-26","kind":"grant","acquired":true,"shares":510,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Consists of Restricted Stock Units (\"RSUs\") granted on August 26, 2021 under the Dynatrace, Inc. 2019 Equity Incentive Plan and the Non-Employee Director Compensation Policy.  Each RSU represents the right to receive one share of Common Stock on the earlier of the one-year anniversary of the date of grant or on the date of the 2022 Annual Meeting of Stockholders."}],"balance_after":7410,"source":{"system":"sec-edgar","filing":"0001773383-21-000099","document":"wf-form4_163035471210477.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000177338321000099/wf-form4_163035471210477.xml","form_type":"4"}},{"id":2629998,"issuer":{"id":697,"kind":"organization","name":"Dynatrace, Inc.","symbol":"DT"},"owners":[{"id":19001,"kind":"person","name":"Rowland Stephen Eric","position":1,"cik":"0001639368","reported_name":"Rowland Stephen Eric","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-07-19T21:23:12.000Z","date":"2021-07-15","kind":"grant","acquired":true,"shares":6900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Consists of Restricted Stock Units (\"RSUs\")  granted under the Dynatrace, Inc. 2019 Equity Incentive Plan on July 15, 2021. Each RSU represents the right to receive one share of Common Stock, 25% of which shall vest on July 15, 2022, with the remainder vesting in 12 equal quarterly installments thereafter."}],"balance_after":6900,"source":{"system":"sec-edgar","filing":"0001773383-21-000078","document":"wf-form4_162672977142945.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1639368/000177338321000078/wf-form4_162672977142945.xml","form_type":"4"}}]}