---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-26-001845"
form_type: "8-K"
ticker: "ABCP"
cik: "0000020639"
company_name: "AmBase Corp"
filed_at: "2026-01-21T23:59:59+00:00"
generated_at: "2026-05-16T09:22:17.852818+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "medium"
source: SEC EDGAR
---

# AmBase: Joseph R. Bianco ceased as employee effective Jan 1, 2026

## Summary
- Joseph R. Bianco left the company effective January 1, 2026; no reason or replacement given.
- Item 5.02 filing indicates departure of a director or principal officer, but title not specified.
- No exhibit filed; limited information available on circumstances or succession.

## SEC filing metadata
- accession: 0001140361-26-001845
- form_type: 8-K
- ticker: ABCP
- cik: 0000020639
- company_name: AmBase Corp
- filed_at: 2026-01-21T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: medium
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/20639/000114036126001845/0001140361-26-001845-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/20639/000114036126001845/ef20063015_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-26-001845
- JSON: https://secwatch.observer/filing/0001140361-26-001845.json
- Plain text: https://secwatch.observer/filing/0001140361-26-001845.txt

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