---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-275207"
form_type: "8-K/A"
ticker: "CHRS"
cik: "0001512762"
company_name: "Coherus Oncology, Inc."
filed_at: "2023-11-13T23:59:59+00:00"
generated_at: "2026-06-08T05:00:14.107112+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Coherus completes Surface Oncology acquisition, files Surface's financials on 8-K/A

## Summary
- Merger closed Sep 8, 2023; Surface became wholly owned subsidiary after two-step merger.
- Unaudited condensed financial statements of Surface for H1 2023 and 2022 now filed on this amendment.
- Financial statements incorporated from Surface's Q2 2023 10-Q filed Aug 2, 2023.
- Original 8-K filed Sep 8, 2023 reported the closing; this amendment adds required financials.

## SEC filing metadata
- accession: 0001193125-23-275207
- form_type: 8-K/A
- ticker: CHRS
- cik: 0001512762
- company_name: Coherus Oncology, Inc.
- filed_at: 2023-11-13T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1512762/000119312523275207/0001193125-23-275207-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1512762/000119312523275207/d514976d8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-275207
- JSON: https://secwatch.observer/filing/0001193125-23-275207.json
- Plain text: https://secwatch.observer/filing/0001193125-23-275207.txt

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