---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-26-037240"
form_type: "8-K"
ticker: "NBTB"
cik: "0000790359"
company_name: "NBT BANCORP INC"
filed_at: "2026-09-21T20:15:13+00:00"
generated_at: "2026-09-21T20:16:26.239686+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# NBT Bancorp appoints Kimberly A. Boynton to board, effective Oct 1, 2026

## Summary
- Board size increased to 13 directors; Boynton fills newly created vacancy effective Oct 1, 2026.
- Boynton is former CEO of Crouse Health (2014-2023); currently real estate agent at Cushman & Wakefield | Pyramid.
- Expected to serve on Audit, Compensation & Benefits, and Risk Management committees.
- No related-party transactions; only standard director compensation and prorated RSUs/retainers.
- Board determined she meets Nasdaq independence standards.

## SEC filing metadata
- accession: 0001140361-26-037240
- form_type: 8-K
- ticker: NBTB
- cik: 0000790359
- company_name: NBT BANCORP INC
- filed_at: 2026-09-21T20:15:13+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/790359/000114036126037240/0001140361-26-037240-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/790359/000114036126037240/ef20082455_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-26-037240
- JSON: https://secwatch.observer/filing/0001140361-26-037240.json
- Plain text: https://secwatch.observer/filing/0001140361-26-037240.txt

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