---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-042836"
form_type: "8-K"
ticker: "XOMA"
cik: "0000791908"
company_name: "XOMA Royalty Corp"
filed_at: "2026-02-09T23:59:59+00:00"
generated_at: "2026-05-16T03:59:12.691661+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# XOMA Royalty closes acquisition of Generation Bio for $4.2913/share plus CVR

## Summary
- Completed tender offer; 4,722,533 shares (approx. 70%) tendered, all accepted.
- Acquisition closed Feb 9, 2026; Generation Bio becomes wholly owned subsidiary.
- CVRs entitle holders to 70-100% of Net Cash Excess and tiered shares of Legacy Assets and Moderna Collaboration proceeds.
- Binney Lease arrangement allocates up to $30M for future lease payments; excess may flow to CVR holders.
- Legacy Assets Transaction Proceeds range from 70% (Year 1-2) to 30% (Year 7-10) of Net Proceeds.

## SEC filing metadata
- accession: 0001193125-26-042836
- form_type: 8-K
- ticker: XOMA
- cik: 0000791908
- company_name: XOMA Royalty Corp
- filed_at: 2026-02-09T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/791908/000119312526042836/0001193125-26-042836-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/791908/000119312526042836/d59988d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-042836
- JSON: https://secwatch.observer/filing/0001193125-26-042836.json
- Plain text: https://secwatch.observer/filing/0001193125-26-042836.txt

## Source-grounded claims
- claim_id: 7282aa842ffc999b9289a26e2e3095e9849171cd
  claim: XOMA Royalty Corp completed an acquisition involving Generation Bio Co. for $4.2913 per Company Share, payable in cash, plus one non-tradeable contingent value right per Company Share (closed 2026-02-09).
  evidence_excerpt: offer to acquire all of Generation Bio’s issued and outstanding shares (the “ Company Shares ”) of common stock, par value $0.0001 per share (the “ Common Stock ”), for (i) $4.2913 per Company Share, payable in cash, without interest and less any applicable tax withholding (such amount, the “ Cash Amount ”), plus (ii) one non-tradeable contingent value right
  evidence_url: https://www.sec.gov/Archives/edgar/data/791908/000119312526042836/0001193125-26-042836-index.htm

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