{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-23-024454","form_type":"8-K","ticker":"ZLAB","cik":"0001704292","company_name":"Zai Lab Ltd","filed_at":"2023-07-06T23:59:59+00:00","discovered_at":"2026-05-14T18:03:34.918638+00:00","generated_at":"2026-06-13T11:58:50.207110+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"Zai Lab promotes Yajing Chen to CFO, replacing Billy Cho effective July 7","bullets":["Yajing Chen promoted to CFO effective July 7, 2023; she was previously Deputy CFO.","William Cho steps down to pursue private equity opportunity; no disagreements with Company.","Chen receives $450,000 base salary, 40% target bonus, option for 20,000 ADSs, and 5,000 RSUs.","Cho gets pro-rated bonus, low six-figure severance, and continued RSU vesting through July 2024 with a three-month trading lock-up."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-23-024454","json":"https://secwatch.observer/filing/0001628280-23-024454.json","markdown":"https://secwatch.observer/filing/0001628280-23-024454.md","text":"https://secwatch.observer/filing/0001628280-23-024454.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1704292/000162828023024454/0001628280-23-024454-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1704292/000162828023024454/zlab-20230706.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-13T11:58:50.207110+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"02e4881ac4","claim":"William Cho departed as Chief Financial Officer at Zai Lab Ltd.","evidence_excerpt":"Also on July 6, the Company announced that Dr. Chen will be succeeding William Cho, who is stepping down from his role as Chief Financial Officer, effective July 7, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1704292/000162828023024454/0001628280-23-024454-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"stepping down"},{"label":"Role","value":"Chief Financial Officer"}],"fact_type":"executive_change"},{"claim_id":"f89e681d8e","claim":"Yajing Chen was appointed as Chief Financial Officer at Zai Lab Ltd.","evidence_excerpt":"On July 6, 2023, Zai Lab Limited (the “Company”) announced that it has appointed Dr. Yajing Chen as its Chief Financial Officer, effective July 7, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1704292/000162828023024454/0001628280-23-024454-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chief Financial Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}