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The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001562180-22-000049","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000156218022000049/primarydocument.xml","form_type":"4"}},{"id":2455146,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2022-01-03T20:17:27.000Z","date":"2021-12-30","kind":"sale","acquired":false,"shares":8154,"price":55.4308,"value":451982.7432,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"This transaction was executed in multiple trades in prices ranging from $55.0100 to $56.0099, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":2344,"source":{"system":"sec-edgar","filing":"0001562180-22-000049","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000156218022000049/primarydocument.xml","form_type":"4"}},{"id":2455145,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2022-01-03T20:17:27.000Z","date":"2021-12-30","kind":"sale","acquired":false,"shares":9245,"price":54.572,"value":504518.14,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades in prices ranging from $53.00 to $53.99, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades in prices ranging from $54.01 to $55.0099, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":10498,"source":{"system":"sec-edgar","filing":"0001562180-22-000049","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000156218022000049/primarydocument.xml","form_type":"4"}},{"id":2455144,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2022-01-03T20:17:27.000Z","date":"2021-12-30","kind":"sale","acquired":false,"shares":5100,"price":53.3817,"value":272246.67,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades in prices ranging from $52.87 to $53.87, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":19743,"source":{"system":"sec-edgar","filing":"0001562180-22-000049","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000156218022000049/primarydocument.xml","form_type":"4"}},{"id":2455143,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2022-01-03T20:17:27.000Z","date":"2021-12-30","kind":"exercise","acquired":true,"shares":24843,"price":4.19,"value":104092.17,"ownership":{"direct":true},"balance_after":24843,"source":{"system":"sec-edgar","filing":"0001562180-22-000049","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000156218022000049/primarydocument.xml","form_type":"4"}},{"id":2455142,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2022-01-03T20:17:27.000Z","date":"2021-12-22","kind":"sale","acquired":false,"shares":36721,"price":54.2655,"value":1992683.4255,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades in prices ranging from $54.00 to $54.99, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001562180-22-000049","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000156218022000049/primarydocument.xml","form_type":"4"}},{"id":2455141,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2022-01-03T20:17:27.000Z","date":"2021-12-22","kind":"sale","acquired":false,"shares":12966,"price":53.6414,"value":695514.3924,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades in prices ranging from $53.00 to $53.99, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":36721,"source":{"system":"sec-edgar","filing":"0001562180-22-000049","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000156218022000049/primarydocument.xml","form_type":"4"}},{"id":2455140,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common 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The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-21-038730","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000089924321038730/doc4.xml","form_type":"4"}},{"id":2555198,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2021-10-01T21:30:14.000Z","date":"2021-10-01","kind":"sale","acquired":false,"shares":14882,"price":53.2761,"value":792854.9202,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades in prices ranging from $52.75 to $53.74, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":32615,"source":{"system":"sec-edgar","filing":"0000899243-21-038730","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000089924321038730/doc4.xml","form_type":"4"}},{"id":2555197,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2021-10-01T21:30:14.000Z","date":"2021-10-01","kind":"sale","acquired":false,"shares":16804,"price":51.9414,"value":872823.2856,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades in prices ranging from $51.69 to $52.68, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":47497,"source":{"system":"sec-edgar","filing":"0000899243-21-038730","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000089924321038730/doc4.xml","form_type":"4"}},{"id":2555196,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2021-10-01T21:30:14.000Z","date":"2021-10-01","kind":"sale","acquired":false,"shares":16472,"price":50.9872,"value":839861.1584,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades in prices ranging from $50.61 to $51.60, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":64301,"source":{"system":"sec-edgar","filing":"0000899243-21-038730","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000089924321038730/doc4.xml","form_type":"4"}},{"id":2555195,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2021-10-01T21:30:14.000Z","date":"2021-10-01","kind":"exercise","acquired":true,"shares":80773,"price":4.19,"value":338438.87,"ownership":{"direct":true},"balance_after":80773,"source":{"system":"sec-edgar","filing":"0000899243-21-038730","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000089924321038730/doc4.xml","form_type":"4"}},{"id":2555194,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2021-10-01T21:30:14.000Z","date":"2021-09-30","kind":"sale","acquired":false,"shares":233077,"price":53.918,"value":12567045.686,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades in prices ranging from $53.41 to $54.39, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-21-038730","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000089924321038730/doc4.xml","form_type":"4"}},{"id":2555193,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2021-10-01T21:30:14.000Z","date":"2021-09-30","kind":"sale","acquired":false,"shares":17400,"price":52.9286,"value":920957.64,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades in prices ranging from $52.41 to $53.36, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."}],"balance_after":233077,"source":{"system":"sec-edgar","filing":"0000899243-21-038730","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000089924321038730/doc4.xml","form_type":"4"}},{"id":2555192,"issuer":{"id":4566,"kind":"organization","name":"Amplitude, Inc.","symbol":"AMPL"},"owners":[{"id":131870,"kind":"person","name":"Johnson Jennifer L.","position":1,"cik":"0001882998","reported_name":"Johnson Jennifer L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Class A Common Stock","published_at":"2021-10-01T21:30:14.000Z","date":"2021-09-30","kind":"exercise","acquired":true,"shares":250477,"price":4.19,"value":1049498.63,"ownership":{"direct":true},"balance_after":250477,"source":{"system":"sec-edgar","filing":"0000899243-21-038730","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1882998/000089924321038730/doc4.xml","form_type":"4"}}]}