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425 ·Filed Oct 9, 2026

TCBX

Third Coast Bancshares, Inc.
NEUTRAL
Impact 4/10
Horizonmonths Processed17d 15h ago SEC0001193125-26-419159
Rule 425 M&A communications
Actionable Insight • Neutral

The filing is a routine M&A communication with no new financial terms or regulatory updates. Monitor for the S-4 registration statement and shareholder vote timeline; the key catalyst will be regulatory approval and the Q1 2027 close.

DirectionNeutral
Confidencehigh
Horizonmonths
Latest settled — T+5d ⚠ clustered
TCBX ▼ -2.52% at T+5d
NEUTRAL call -2.52% · α vs SPY -1.02% · entry $41.70 → $40.65
Next anchor: T+20d in 10d
Latest observation: T+9 -10.61% FF3 residual α
Entry = T+0 close
Oct 9, 2026
via day close
T+1d
+0.19%
call +0.19% · α +0.20%
$41.78
settled 15d ago
T+5d
-2.52%
call -2.52% · α -1.02%
$40.65
settled 11d ago
T+20d
Pending
in 10d
T+60d
Pending
in 2mo

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Executive Summary

Third Coast Bancshares filed a Rule 425 communication featuring a Houston Business Journal article that provides additional color on the pending $239 million all-stock acquisition of Great Plains Bancshares. The article highlights the strategic rationale (expanding into Oklahoma, doubling branch count to 43, reaching ~$9B in assets) and notes that the deal was delayed by the sudden death of Great Plains' chairman but is now on track for a Q1 2027 close. The filing is promotional in nature and contains no new material financial terms or regulatory updates beyond what was announced on October 7.

Key Financial Metrics

Deal Value
$239.0M
Deal Type
merger

Key Facts

  • Third Coast to acquire Great Plains Bancshares for $239 million in all-stock consideration.
  • Combined institution expected to have approximately $9 billion in total assets and 43 branches across Texas and Oklahoma.
  • Deal expected to close in Q1 2027; talks began in February 2026 and were delayed by the death of Great Plains Chairman Barton Russell Kirchoff.
  • Third Coast projects 14% EPS accretion in 2028 and $17 million in cost savings (20% of Great Plains' non-interest expense base).
  • Third Coast's Houston-area deposits grew 16% YoY as of June 30, 2026.
  • This is Third Coast's third acquisition since 2019 and second in the past 12 months (following Keystone Bancshares in Oct 2025).

Financial Impact

$239 million all-stock deal; combined ~$9B assets; 14% EPS accretion projected for 2028; $17M cost savings (20% of Great Plains' expense base).

assetsdepositsbranchesEPS accretioncost savings

Risk Factors

  • Regulatory approval may be delayed or conditioned, especially given the multi-state expansion.
  • Integration risk from two acquisitions in close succession (Keystone closed Feb 2026, Great Plains pending).
  • Dilution from stock issuance in the all-stock deal could pressure near-term EPS.
  • Death of Great Plains' chairman introduces key-person risk and potential management disruption.

Investment Themes

Traditional Finance

Documents Analyzed

This report is based on 4 SEC documents filed with EDGAR.

DocumentAccession Number
425 Filing (Primary)0001193125-26-419159
Document: 0001193125-26-419159-index-headers.html0001193125-26-419159
Document: 0001193125-26-419159-index.html0001193125-26-419159
Document: 0001193125-26-419159.txt0001193125-26-419159
16 reports for TCBX
Performance horizon
100% Hit rate @ T+1 7 of 7 directional calls Went positive at some point 7 of 7 best @ T+20▲ +6.84%Jul 22, 2026
Filters
Rows
Reports for TCBX — sortable, filterable
TypeNow
Oct 23, 2026
3d ago
425
NEUTRAL ★ 5/10
$39.80awaiting T+1—$40.12 (+0.80%)
Oct 21, 2026
5d ago
425
BEARISH ★ 6/10
$40.00 $39.80▲ +0.50%▼ −0.02%$40.12 (−0.30%)
Oct 21, 2026
5d ago
8-K
MIXED ★ 6/10
$40.00 $39.80▼ −0.50%▲ +0.02%$40.12 (+0.30%)
Oct 13, 2026
13d ago
425
BULLISH ★ 6/10
$41.20 $41.40▲ +0.49%▲ +0.20%$40.12 (−2.62%)
Oct 13, 2026
13d ago
8-K
BULLISH ★ 6/10
$41.20 $41.40▲ +0.49%▲ +0.20%$40.12 (−2.62%)
Oct 9, 2026
17d ago
425
NEUTRAL ★ 4/10
$41.70 $41.78▲ +0.19%▲ +0.20%$40.12 (−3.79%)
Oct 9, 2026
17d ago
425
NEUTRAL ★ 4/10
$41.70 $41.78▲ +0.19%▲ +0.20%$40.12 (−3.79%)
Oct 7, 2026
20d ago
425
BULLISH ★ 6/10
$41.27 $41.77▲ +1.21%▲ +1.63%$40.12 (−2.79%)
Oct 7, 2026
20d ago
8-K
BULLISH ★ 6/10
$41.27 $41.77▲ +1.21%▲ +1.63%$40.12 (−2.79%)
Sep 18, 2026
5w ago
8-K
NEUTRAL ★ 2/10
$44.05 $43.56▼ −1.11%▼ −1.10%$40.12 (−8.92%)
Showing 10 of 16

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Report published Oct 9, 2026