SCHEDULE 13G

CoastalSouth Bancshares Inc

Common Stock, par value $1.00 per share · CUSIP: 19058X207

Event date: 2025-12-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Fourthstone LLC

  Shares: 959,797.00 · Class: 8.01%

• Fourthstone Master Opportunity Fund Ltd

  Shares: 748,448.00 · Class: 6.25%

• Fourthstone GP LLC

  Shares: 211,349.00 · Class: 1.76%

• Fourthstone QP Opportunity Fund LP

  Shares: 196,246.00 · Class: 1.64%

• Fourthstone Small-Cap Financials Fund LP

  Shares: 15,103.00 · Class: 0.13%

• L. Phillip Stone, IV

  Shares: 959,797.00 · Class: 8.01%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.