---
schema_version: "secwatch.filing_event.v1"
accession: "0001846253-26-000042"
form_type: "8-K"
ticker: "OABI"
cik: "0001846253"
company_name: "OmniAb, Inc."
filed_at: "2026-07-13T12:06:34+00:00"
generated_at: "2026-07-13T12:10:03.825654+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# OmniAb appoints Amechi Nwachuku as COO effective July 13, 2026

## Summary
- Amechi Nwachuku appointed COO, effective July 13, 2026; most recently VP at Thermo Fisher Scientific.
- Initial annual base salary of $445,000; eligible for annual target bonus of 45% of base salary.
- Received $20,000 signing bonus; granted stock options to purchase 800,000 shares vesting over 4 years.
- Options vest 12.5% at six-month anniversary, then monthly; exercise price equals closing price on grant date.
- Eligible for severance under OmniAb Severance Plan and change-in-control agreement with enhanced benefits.

## SEC filing metadata
- accession: 0001846253-26-000042
- form_type: 8-K
- ticker: OABI
- cik: 0001846253
- company_name: OmniAb, Inc.
- filed_at: 2026-07-13T12:06:34+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1846253/000184625326000042/0001846253-26-000042-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1846253/000184625326000042/oabi-20260713.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001846253-26-000042
- JSON: https://secwatch.observer/filing/0001846253-26-000042.json
- Plain text: https://secwatch.observer/filing/0001846253-26-000042.txt

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