---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-24-049470"
form_type: "8-K"
ticker: "NBTB"
cik: "0000790359"
company_name: "NBT BANCORP INC"
filed_at: "2024-12-13T23:59:59+00:00"
generated_at: "2026-05-29T03:48:22.321677+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# NBT Bancorp supplements merger proxy after eight demand letters and two lawsuits

## Summary
- Evans received 8 demand letters (Oct 30–Dec 9, 2024) and two NY state complaints alleging incomplete proxy disclosures.
- NBT and Evans supplement proxy with revised Piper Sandler peer-group tables and discount-rate methodology (Evans ~10.87%, NBT ~8.87%).
- Company denies allegations and legal necessity but supplements to avoid delay/cost; merger agreement (Sept 9, 2024) remains in effect.
- Supplemental disclosures cover comparable-company analyses, precedent transactions, and net-present-value analyses for the fairness opinion.

## SEC filing metadata
- accession: 0001140361-24-049470
- form_type: 8-K
- ticker: NBTB
- cik: 0000790359
- company_name: NBT BANCORP INC
- filed_at: 2024-12-13T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/790359/000114036124049470/0001140361-24-049470-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/790359/000114036124049470/ef20039973_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-24-049470
- JSON: https://secwatch.observer/filing/0001140361-24-049470.json
- Plain text: https://secwatch.observer/filing/0001140361-24-049470.txt

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