---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-23-016803"
form_type: "8-K"
ticker: "ZLAB"
cik: "0001704292"
company_name: "Zai Lab Ltd"
filed_at: "2023-05-09T23:59:59+00:00"
generated_at: "2026-06-15T09:28:22.277794+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Zai Lab Q1 product revenue $62.8M, up 36% YoY; net loss narrows to $49.1M

## Summary
- Product revenue $62.8M (+36% YoY); ZEJULA $42.7M (+44% YoY); Optune $13.3M; QINLOCK $1.3M; NUZYRA $5.5M.
- Net loss $49.1M ($0.05 per share) vs $82.4M loss ($0.09 per share) in Q1 2022.
- Cash $931.4M at March 31, 2023; R&D expense $48.5M, SG&A $62.5M.
- Josh Smiley promoted to President and COO effective April 1, 2023.
- Entered global license with MediLink for DLL3 ADC (ZL-1310) to expand lung cancer and oncology pipeline.

## SEC filing metadata
- accession: 0001628280-23-016803
- form_type: 8-K
- ticker: ZLAB
- cik: 0001704292
- company_name: Zai Lab Ltd
- filed_at: 2023-05-09T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1704292/000162828023016803/0001628280-23-016803-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1704292/000162828023016803/zlab-20230509.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-23-016803
- JSON: https://secwatch.observer/filing/0001628280-23-016803.json
- Plain text: https://secwatch.observer/filing/0001628280-23-016803.txt

## Key facts
- Earnings Releases
  Zai Lab Ltd reported the first quarter of 2023 results: revenue $62.8 million.
  - Period: the first quarter of 2023
  - Revenue: $62.8 million
  - Result: reported results
  source text: Total product revenue of $62.8 million for the first quarter of 2023
  evidence_url: https://www.sec.gov/Archives/edgar/data/1704292/000162828023016803/0001628280-23-016803-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.