{"data":[{"accessionNo":"0000315066-26-001939","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"AMPLITUDE INC","ticker":"AMPL","cusip":"03213A104","securityClass":"CLASS A COMMON STOCK","eventDate":"2026-06-30","reportingPerson":"Abigail P. Johnson","reportingCik":null,"personType":"IN","sharesOwned":5979436.49,"percentOfClass":5.8,"filedAt":"2026-08-06","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0000315066-26-001939","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"AMPLITUDE INC","ticker":"AMPL","cusip":"03213A104","securityClass":"CLASS A COMMON STOCK","eventDate":"2026-06-30","reportingPerson":"FMR LLC","reportingCik":null,"personType":"HC","sharesOwned":5979436.49,"percentOfClass":5.8,"filedAt":"2026-08-06","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0002012383-26-002177","formType":"SCHEDULE 13G/A","amendmentNo":1,"issuerCik":"0001866692","issuerName":"Amplitude, Inc.","ticker":"AMPL","cusip":"03213A104","securityClass":"Class A Stock","eventDate":"2026-06-30","reportingPerson":"BlackRock, Inc.","reportingCik":null,"personType":"HC","sharesOwned":7935962,"percentOfClass":7.6,"filedAt":"2026-07-27","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0001109448-26-000165","formType":"SCHEDULE 13G/A","amendmentNo":1,"issuerCik":"0001866692","issuerName":"Amplitude Inc","ticker":"AMPL","cusip":"03213A104","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"AllianceBernstein L.P.","reportingCik":null,"personType":"IA","sharesOwned":317618,"percentOfClass":0.3,"filedAt":"2026-05-18","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0002100121-26-000110","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"Amplitude Inc","ticker":"AMPL","cusip":"03213A104","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"Vanguard Portfolio Management","reportingCik":null,"personType":"IA","sharesOwned":6250377,"percentOfClass":6,"filedAt":"2026-04-28","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0000902219-26-000115","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"Amplitude, Inc.","ticker":"AMPL","cusip":"03213A104","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"Wellington Management Group LLP","reportingCik":null,"personType":"HC","sharesOwned":11154556,"percentOfClass":10.7,"filedAt":"2026-04-07","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0000902219-26-000114","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"Amplitude, Inc.","ticker":"AMPL","cusip":"03213A104","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"Wellington Management Group LLP","reportingCik":null,"personType":"HC","sharesOwned":11154556,"percentOfClass":10.7,"filedAt":"2026-04-07","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0000902219-26-000114","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"Amplitude, Inc.","ticker":"AMPL","cusip":"03213A104","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"Wellington Group Holdings LLP","reportingCik":null,"personType":"HC","sharesOwned":11154556,"percentOfClass":10.7,"filedAt":"2026-04-07","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0000902219-26-000114","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"Amplitude, Inc.","ticker":"AMPL","cusip":"03213A104","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"Wellington Investment Advisors Holdings LLP","reportingCik":null,"personType":"HC","sharesOwned":11154556,"percentOfClass":10.7,"filedAt":"2026-04-07","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0000902219-26-000115","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"Amplitude, Inc.","ticker":"AMPL","cusip":"03213A104","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"Wellington Group Holdings LLP","reportingCik":null,"personType":"HC","sharesOwned":11154556,"percentOfClass":10.7,"filedAt":"2026-04-07","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0000902219-26-000115","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"Amplitude, Inc.","ticker":"AMPL","cusip":"03213A104","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"Wellington Investment Advisors Holdings LLP","reportingCik":null,"personType":"HC","sharesOwned":11154556,"percentOfClass":10.7,"filedAt":"2026-04-07","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0000902219-26-000114","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"Amplitude, Inc.","ticker":"AMPL","cusip":"03213A104","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"Wellington Management Company LLP","reportingCik":null,"personType":"IA","sharesOwned":11154556,"percentOfClass":8.8,"filedAt":"2026-04-07","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0000902219-26-000115","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"Amplitude, Inc.","ticker":"AMPL","cusip":"03213A104","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"Wellington Management Company LLP","reportingCik":null,"personType":"IA","sharesOwned":11154556,"percentOfClass":8.8,"filedAt":"2026-04-07","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0000102909-26-000600","formType":"SCHEDULE 13G/A","amendmentNo":4,"issuerCik":"0001866692","issuerName":"Amplitude Inc","ticker":"AMPL","cusip":"03213A104","securityClass":"Common Stock","eventDate":"2026-03-13","reportingPerson":"The Vanguard Group","reportingCik":null,"personType":"IA","sharesOwned":0,"percentOfClass":0,"filedAt":"2026-03-26","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0001897612-26-000287","formType":"SCHEDULE 13G/A","amendmentNo":4,"issuerCik":"0001866692","issuerName":"AMPLITUDE INC-CLASS A","ticker":"AMPL","cusip":null,"securityClass":"COMMON STOCK","eventDate":"2025-12-31","reportingPerson":"T. Rowe Price Investment Management, Inc.","reportingCik":null,"personType":"IA","sharesOwned":441,"percentOfClass":0,"filedAt":"2026-02-17","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0000102909-26-000018","formType":"SCHEDULE 13G/A","amendmentNo":3,"issuerCik":"0001866692","issuerName":"Amplitude Inc","ticker":"AMPL","cusip":null,"securityClass":"Common Stock","eventDate":"2025-12-31","reportingPerson":"The Vanguard Group","reportingCik":null,"personType":"IA","sharesOwned":10825568,"percentOfClass":10.44,"filedAt":"2026-01-07","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0001109448-25-000126","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001866692","issuerName":"Amplitude Inc","ticker":"AMPL","cusip":null,"securityClass":"Common Stock","eventDate":"2025-09-30","reportingPerson":"AllianceBernstein L.P.","reportingCik":null,"personType":"IA","sharesOwned":6025390,"percentOfClass":5.9,"filedAt":"2025-11-14","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"},{"accessionNo":"0001897612-25-000551","formType":"SCHEDULE 13G/A","amendmentNo":3,"issuerCik":"0001866692","issuerName":"AMPLITUDE INC-CLASS A","ticker":"AMPL","cusip":null,"securityClass":"COMMON STOCK","eventDate":"2025-09-30","reportingPerson":"T. Rowe Price Investment Management, Inc.","reportingCik":null,"personType":"IA","sharesOwned":5071834,"percentOfClass":5,"filedAt":"2025-11-14","canonicalUrl":"https://xoomar.com/markets/stocks/ampl"}],"updatedAt":"2026-11-04T01:22:33.658Z","source":"xoomar.com","docs":"https://xoomar.com/markets/api","license":"https://xoomar.com/terms","attribution":"Credit XOOMAR with a link to the dataset page on xoomar.com when you republish this data","canonicalUrl":"https://xoomar.com/markets/stocks/ampl","meta":{"source":"SEC","sourceAttribution":"Schedule 13D and 13G data: SEC.","notice":"10 requests a minute without a key, 30 with a free key. Get a free key at https://xoomar.com/signup?utm_source=api, register your app at https://xoomar.com/developers/register?utm_source=api, and credit the data as \"Data: XOOMAR\" together with the sourceAttribution line."}}