---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-151279"
form_type: "8-K"
ticker: "ZYME"
cik: "0001937653"
company_name: "Zymeworks Inc."
filed_at: "2025-06-27T23:59:59+00:00"
generated_at: "2026-05-18T16:46:32.032567+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Zymeworks removes warrant cap; EcoR1 exercises for 5.1M shares, diluting by ~7%

## Summary
- Removed 19.99% beneficial ownership cap on pre-funded warrants held by EcoR1 Capital.
- EcoR1 net exercised warrants for 5,086,480 shares of common stock at $0.0001 per share on June 26, 2025.
- Outstanding shares increased to 74,844,505 from ~69.8M, representing ~7% dilution.
- Warrants originally issued Dec 2023 at $9.83 each for $50M; exercise provides no new cash.
- Oleg Nodelman and Scott Platshon, both board members, represent EcoR1.

## SEC filing metadata
- accession: 0001193125-25-151279
- form_type: 8-K
- ticker: ZYME
- cik: 0001937653
- company_name: Zymeworks Inc.
- filed_at: 2025-06-27T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 1.01, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1937653/000119312525151279/0001193125-25-151279-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1937653/000119312525151279/d19414d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-151279
- JSON: https://secwatch.observer/filing/0001193125-25-151279.json
- Plain text: https://secwatch.observer/filing/0001193125-25-151279.txt

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