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Pursuant to time-based vesting requirements, 100% of the Target RSU Number is scheduled to vest on March 15, 2029, subject to continued service requirements through such date. 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Pursuant to time-based vesting requirements, 100% of the Target RSU Number is scheduled to vest on March 15, 2029, subject to continued service requirements through such date. In addition, the number of shares subject to the RSUs may be decreased by up to 100% or increased by up to 150% of the Target RSU Number or may remain the same, based on the Company's total shareholder return and revenue growth rate over the period of February 1, 2026 through January 31, 2029."}],"balance_after":17329,"derivative":{"expiration_date":"2029-03-15","underlying":"Ordinary Shares","underlying_shares":17329},"source":{"system":"sec-edgar","filing":"0001280263-26-000023","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1280263/000128026326000023/edgardoc.xml","form_type":"4"}},{"id":861112,"issuer":{"id":4248,"kind":"organization","name":"AMBARELLA INC","symbol":"AMBA"},"owners":[{"id":32756,"kind":"person","name":"Ju Chi-Hong","position":1,"cik":"0001882831","reported_name":"Ju Chi-Hong","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior VP, Systems & GM, Asia"}}],"security":"Ordinary Shares","published_at":"2026-03-04T22:38:53.000Z","date":"2026-03-02","kind":"grant","planned":false,"acquired":true,"shares":17329,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The restricted stock units vest at the rate of 1/12 per quarter commencing on March 15, 2026."}],"balance_after":159188,"source":{"system":"sec-edgar","filing":"0001280263-26-000023","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280263/000128026326000023/edgardoc.xml","form_type":"4"}},{"id":861111,"issuer":{"id":4248,"kind":"organization","name":"AMBARELLA INC","symbol":"AMBA"},"owners":[{"id":32757,"kind":"person","name":"Wang Feng-Ming","position":1,"cik":"0001558686","reported_name":"Wang Feng-Ming","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Performance Stock Units","published_at":"2026-03-04T22:36:32.000Z","date":"2026-03-02","kind":"grant","planned":true,"acquired":true,"shares":53203,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F9","text":"Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. 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Pursuant to time-based vesting requirements, 100% of the Target RSU Number is scheduled to vest on March 15, 2029, subject to continued service requirements through such date. In addition, the number of shares subject to the RSUs may be decreased by up to 100% or increased by up to 150% of the Target RSU Number or may remain the same, based on the Company's total shareholder return and revenue growth rate over the period of February 1, 2026 through January 31, 2029."}],"balance_after":53203,"derivative":{"expiration_date":"2029-03-15","underlying":"Ordinary Shares","underlying_shares":53203},"source":{"system":"sec-edgar","filing":"0001280263-26-000022","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1280263/000128026326000022/edgardoc.xml","form_type":"4"}},{"id":861110,"issuer":{"id":4248,"kind":"organization","name":"AMBARELLA INC","symbol":"AMBA"},"owners":[{"id":32757,"kind":"person","name":"Wang Feng-Ming","position":1,"cik":"0001558686","reported_name":"Wang Feng-Ming","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Non-Qualified Stock Option (right to buy)","published_at":"2026-03-04T22:36:32.000Z","date":"2026-03-02","kind":"exercise","planned":true,"acquired":false,"shares":50000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The shares vest at the rate of 1/42 per month commencing on March 15, 2016."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The shares vest at the rate of 1/42 per month commencing on March 15, 2016."}],"balance_after":0,"derivative":{"exercise_price":41.36,"expiration_date":"2026-03-06","underlying":"Ordinary Shares","underlying_shares":50000},"source":{"system":"sec-edgar","filing":"0001280263-26-000022","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1280263/000128026326000022/edgardoc.xml","form_type":"4"}},{"id":861109,"issuer":{"id":4248,"kind":"organization","name":"AMBARELLA INC","symbol":"AMBA"},"owners":[{"id":32757,"kind":"person","name":"Wang Feng-Ming","position":1,"cik":"0001558686","reported_name":"Wang Feng-Ming","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Ordinary Shares","published_at":"2026-03-04T22:36:32.000Z","date":"2026-03-02","kind":"grant","planned":true,"acquired":true,"shares":53203,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F7","text":"The restricted stock units vest at the rate of 1/12 per quarter commencing on March 15, 2026."}],"balance_after":822182,"source":{"system":"sec-edgar","filing":"0001280263-26-000022","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280263/000128026326000022/edgardoc.xml","form_type":"4"}},{"id":861108,"issuer":{"id":4248,"kind":"organization","name":"AMBARELLA INC","symbol":"AMBA"},"owners":[{"id":32757,"kind":"person","name":"Wang Feng-Ming","position":1,"cik":"0001558686","reported_name":"Wang Feng-Ming","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Ordinary Shares","published_at":"2026-03-04T22:36:32.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":12040,"price":61.4236,"value":739540.144,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on October 8, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $61.22 to $$62.2199 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the ranges set forth in this Form 4."}],"balance_after":768979,"source":{"system":"sec-edgar","filing":"0001280263-26-000022","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1280263/000128026326000022/edgardoc.xml","form_type":"4"}},{"id":861107,"issuer":{"id":4248,"kind":"organization","name":"AMBARELLA INC","symbol":"AMBA"},"owners":[{"id":32757,"kind":"person","name":"Wang Feng-Ming","position":1,"cik":"0001558686","reported_name":"Wang Feng-Ming","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Ordinary Shares","published_at":"2026-03-04T22:36:32.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":32460,"price":60.9127,"value":1977226.242,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on October 8, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $60.21 to $$61.2099 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the ranges set forth in this Form 4."}],"balance_after":781019,"source":{"system":"sec-edgar","filing":"0001280263-26-000022","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280263/000128026326000022/edgardoc.xml","form_type":"4"}},{"id":861106,"issuer":{"id":4248,"kind":"organization","name":"AMBARELLA INC","symbol":"AMBA"},"owners":[{"id":32757,"kind":"person","name":"Wang Feng-Ming","position":1,"cik":"0001558686","reported_name":"Wang Feng-Ming","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Ordinary Shares","published_at":"2026-03-04T22:36:32.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":2600,"price":59.5269,"value":154769.94,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on October 8, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $59.16 to $$60.1599 per share. 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