---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-21-119820"
form_type: "8-K"
ticker: "OABI"
cik: "0001846253"
company_name: "OmniAb, Inc."
filed_at: "2021-09-27T23:59:59+00:00"
generated_at: "2026-06-29T01:21:23.304985+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Avista Public Acquisition Corp. II units separate into AHPA and AHPAW on Sept 30

## Summary
- Holders of 23,000,000 units can elect to separately trade Class A ordinary shares (AHPA) and warrants (AHPAW) starting Sept 30, 2021.
- Separated shares trade as AHPA, warrants as AHPAW; units continue as AHPAU on Nasdaq.
- No fractional warrants will be issued; only whole warrants will trade upon separation.

## SEC filing metadata
- accession: 0001104659-21-119820
- form_type: 8-K
- ticker: OABI
- cik: 0001846253
- company_name: OmniAb, Inc.
- filed_at: 2021-09-27T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1846253/000110465921119820/0001104659-21-119820-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1846253/000110465921119820/tm2128432d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-21-119820
- JSON: https://secwatch.observer/filing/0001104659-21-119820.json
- Plain text: https://secwatch.observer/filing/0001104659-21-119820.txt

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