---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-25-019221"
form_type: "8-K"
ticker: "PLBC"
cik: "0001168455"
company_name: "PLUMAS BANCORP"
filed_at: "2025-06-03T23:59:59+00:00"
generated_at: "2026-05-20T00:58:58.951619+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Cornerstone shareholders approve merger into Plumas Bancorp; close expected early July 2025

## Summary
- Cornerstone shareholders approved the merger agreement; Plumas has obtained all required bank regulatory approvals.
- Merger expected to close in early July 2025; Plumas shareholder approval not needed.
- Combined company to have ~$2.3B in assets and 19 branches across 11 counties in Northern California and Nevada.
- Cornerstone CEO Matthew Moseley will remain with Plumas following the acquisition.

## SEC filing metadata
- accession: 0001437749-25-019221
- form_type: 8-K
- ticker: PLBC
- cik: 0001168455
- company_name: PLUMAS BANCORP
- filed_at: 2025-06-03T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1168455/000143774925019221/0001437749-25-019221-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1168455/000143774925019221/plbc20250531_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-25-019221
- JSON: https://secwatch.observer/filing/0001437749-25-019221.json
- Plain text: https://secwatch.observer/filing/0001437749-25-019221.txt

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