secwatch.observer — SEC 8-K summary
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Issuer:     Xencor Inc (XNCR)
CIK:        0001326732
Form:       8-K
Filed at:   2026-03-04T23:59:59+00:00
Accession:  0001326732-26-000021
Event type: other_material
Sentiment:  negative
Materiality: 0.85
Item codes: 7.01, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

Alexion refuses further US Ultomiris royalties; Xencor disputes, cuts revenue forecast
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- Alexion informed Xencor it will not pay additional US royalties on Ultomiris and will cease future US payments.
- Xencor previously expected $100-$120M in additional US royalties through 2028; now considers that revenue at risk.
- Ex-US royalty payments from Alexion continue unchanged, per Xencor's CEO.
- Xencor updates 2026 year-end cash guidance to $380-400M; operating runway extended into mid-2028.
- Xencor is actively evaluating options and disagrees with Alexion's position.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1326732/000132673226000021/0001326732-26-000021-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1326732/000132673226000021/xncr-20260304.htm
  HTML page:      https://secwatch.observer/filing/0001326732-26-000021

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer