---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-028925"
form_type: "8-K"
ticker: "FISI"
cik: "0000862831"
company_name: "FINANCIAL INSTITUTIONS INC"
filed_at: "2024-03-11T23:59:59+00:00"
generated_at: "2026-06-05T00:15:42.747169+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Financial Institutions, Inc. estimates up to $18.9M loss from customer deposit fraud

## Summary
- Fraudulent deposit transactions occurred over several days ending early March 2024 by a single business customer.
- Company currently estimates potential pre-tax exposure of up to $18.9M ($14.1M net of taxes).
- Bank says incident is isolated to a single deposit-only business relationship; remains well-capitalized.
- Bank is working with law enforcement and pursuing all available recovery to mitigate loss.

## SEC filing metadata
- accession: 0000950170-24-028925
- form_type: 8-K
- ticker: FISI
- cik: 0000862831
- company_name: FINANCIAL INSTITUTIONS INC
- filed_at: 2024-03-11T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/862831/000095017024028925/0000950170-24-028925-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/862831/000095017024028925/fisi-20240311.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-028925
- JSON: https://secwatch.observer/filing/0000950170-24-028925.json
- Plain text: https://secwatch.observer/filing/0000950170-24-028925.txt

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