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Our ADSs and Ordinary Shares are fully fungible. For purposes of this Form 4, we are reporting this in terms of ADSs."},{"field":"shares","element":"transactionShares","label":"F2","text":"ADSs acquired upon vesting of Restricted Share Units (\"RSUs\")."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Each RSU represents a contingent right to receive one ADS."}],"balance_after":35257,"source":{"system":"sec-edgar","filing":"0000905148-26-001543","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1704292/000090514826001543/form4.xml","form_type":"4"}},{"id":815497,"issuer":{"id":4271,"kind":"organization","name":"Zai Lab Ltd","symbol":"ZLAB"},"owners":[{"id":20729,"kind":"person","name":"Chen Yajing","position":1,"cik":"0001985694","reported_name":"Chen Yajing","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"American Depositary Shares","published_at":"2026-04-03T21:57:53.000Z","date":"2026-04-01","kind":"exercise","planned":false,"acquired":true,"shares":1500,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Each American Depositary Share (\"ADS\") represents ten Ordinary Shares of the issuer. Our ADSs and Ordinary Shares are fully fungible. For purposes of this Form 4, we are reporting this in terms of ADSs."},{"field":"shares","element":"transactionShares","label":"F2","text":"ADSs acquired upon vesting of Restricted Share Units (\"RSUs\")."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Each RSU represents a contingent right to receive one ADS."}],"balance_after":21499,"source":{"system":"sec-edgar","filing":"0000905148-26-001543","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1704292/000090514826001543/form4.xml","form_type":"4"}},{"id":816329,"issuer":{"id":4271,"kind":"organization","name":"Zai Lab Ltd","symbol":"ZLAB"},"owners":[{"id":53247,"kind":"person","name":"Amado Rafael","position":1,"cik":"0001662119","reported_name":"Amado Rafael","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Restricted Share Units","published_at":"2026-04-03T21:57:35.000Z","date":"2026-04-02","kind":"exercise","planned":false,"acquired":false,"shares":5391,"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 ADS."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The RSUs vest in equal annual installments over four years beginning on 04/03/2024, the first anniversary of the date of grant, subject to continuous service. Vested shares will be delivered in the form of ADSs to the reporting person following vesting."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The RSUs vest in equal annual installments over four years beginning on 04/03/2024, the first anniversary of the date of grant, subject to continuous service. Vested shares will be delivered in the form of ADSs to the reporting person following vesting."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"Each American Depositary Share (\"ADS\") represents ten Ordinary Shares of the issuer. Our ADSs and Ordinary Shares are fully fungible. For purposes of this Form 4, we are reporting this in terms of ADSs."}],"balance_after":5391,"derivative":{"underlying":"American Depositary Shares","underlying_shares":5391},"source":{"system":"sec-edgar","filing":"0000905148-26-001542","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1662119/000090514826001542/form4.xml","form_type":"4"}},{"id":816328,"issuer":{"id":4271,"kind":"organization","name":"Zai Lab Ltd","symbol":"ZLAB"},"owners":[{"id":53247,"kind":"person","name":"Amado Rafael","position":1,"cik":"0001662119","reported_name":"Amado Rafael","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Restricted Share Units","published_at":"2026-04-03T21:57:35.000Z","date":"2026-04-01","kind":"exercise","planned":false,"acquired":false,"shares":19523,"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 ADS."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The RSUs vest in equal annual installments over four years beginning on 04/01/2025, the first anniversary of the date of grant, subject to continuous service. Vested shares will be delivered in the form of ADSs to the reporting person following vesting."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The RSUs vest in equal annual installments over four years beginning on 04/01/2025, the first anniversary of the date of grant, subject to continuous service. Vested shares will be delivered in the form of ADSs to the reporting person following vesting."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"Each American Depositary Share (\"ADS\") represents ten Ordinary Shares of the issuer. Our ADSs and Ordinary Shares are fully fungible. For purposes of this Form 4, we are reporting this in terms of ADSs."}],"balance_after":39046,"derivative":{"underlying":"American Depositary Shares","underlying_shares":19523},"source":{"system":"sec-edgar","filing":"0000905148-26-001542","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1662119/000090514826001542/form4.xml","form_type":"4"}},{"id":816327,"issuer":{"id":4271,"kind":"organization","name":"Zai Lab Ltd","symbol":"ZLAB"},"owners":[{"id":53247,"kind":"person","name":"Amado Rafael","position":1,"cik":"0001662119","reported_name":"Amado Rafael","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Performance-Based Share Units","published_at":"2026-04-03T21:57:35.000Z","date":"2026-03-04","kind":"grant","planned":false,"acquired":true,"shares":14905,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Each performance-based share unit (\"PSU\") represents a contingent right to receive one ADS."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The reporting person was granted PSUs on March 12, 2025 based on the satisfaction of specified performance criteria between January 1, 2025 through December 31, 2025. On March 4, 2026, the performance-based vesting conditions were confirmed for PSUs representing 14,905 ADSs. The PSUs vest in full on March 12, 2028, the third anniversary of the date of grant, subject to continuous service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The reporting person was granted PSUs on March 12, 2025 based on the satisfaction of specified performance criteria between January 1, 2025 through December 31, 2025. On March 4, 2026, the performance-based vesting conditions were confirmed for PSUs representing 14,905 ADSs. The PSUs vest in full on March 12, 2028, the third anniversary of the date of grant, subject to continuous service."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"Each American Depositary Share (\"ADS\") represents ten Ordinary Shares of the issuer. Our ADSs and Ordinary Shares are fully fungible. For purposes of this Form 4, we are reporting this in terms of ADSs."}],"balance_after":14905,"derivative":{"underlying":"American Depositary Shares","underlying_shares":14905},"source":{"system":"sec-edgar","filing":"0000905148-26-001542","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1662119/000090514826001542/form4.xml","form_type":"4"}}],"next_cursor":"2026-04-03T21:57:35.000000Z,816327"}