---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-21-151148"
form_type: "8-K"
ticker: "DWSN"
cik: "0000799165"
company_name: "DAWSON GEOPHYSICAL CO"
filed_at: "2021-12-17T23:59:59+00:00"
generated_at: "2026-06-28T00:19:51.050339+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Dawson Geophysical amends merger agreement with Wilks Brothers, adds two-step tender offer extension

## Summary
- Amendment signed Dec 14, 2021 to Agreement and Plan of Merger with Wilks Brothers LLC and WB Acquisitions Inc.
- If 65%-80% of shares tendered in initial 20-day period, offer extended by 10 then 14 business days to reach 80% minimum.
- All other terms of the original Oct 25, 2021 Merger Agreement remain unchanged.
- Extension provisions designed to increase likelihood of satisfying the 80% minimum condition for closing.

## SEC filing metadata
- accession: 0001104659-21-151148
- form_type: 8-K
- ticker: DWSN
- cik: 0000799165
- company_name: DAWSON GEOPHYSICAL CO
- filed_at: 2021-12-17T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/799165/000110465921151148/0001104659-21-151148-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/799165/000110465921151148/tm2135573d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-21-151148
- JSON: https://secwatch.observer/filing/0001104659-21-151148.json
- Plain text: https://secwatch.observer/filing/0001104659-21-151148.txt

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