---
schema_version: "secwatch.filing_event.v1"
accession: "0001326732-26-000049"
form_type: "8-K"
ticker: "XNCR"
cik: "0001326732"
company_name: "Xencor Inc"
filed_at: "2026-07-29T20:05:44+00:00"
generated_at: "2026-07-29T20:07:41.226278+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Xencor settles Ultomiris U.S. royalty dispute with Alexion for $105M

## Summary
- Xencor to receive $105M in two equal payments: $52.5M in Aug 2026 and $52.5M in July 2027.
- Alexion has no further obligation to pay U.S. royalties on Ultomiris; ex-U.S. royalties unchanged.
- Cash runway extended through 2028 based on current operating plans.
- Dispute began in March 2026 when Alexion claimed no further U.S. royalties were owed.
- CEO Bassil Dahiyat says resolution provides immediate capital and reflects expected U.S. royalty value.

## SEC filing metadata
- accession: 0001326732-26-000049
- form_type: 8-K
- ticker: XNCR
- cik: 0001326732
- company_name: Xencor Inc
- filed_at: 2026-07-29T20:05:44+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1326732/000132673226000049/0001326732-26-000049-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1326732/000132673226000049/xncr-20260729.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001326732-26-000049
- JSON: https://secwatch.observer/filing/0001326732-26-000049.json
- Plain text: https://secwatch.observer/filing/0001326732-26-000049.txt

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