SCHEDULE 13D/A

Tectonic Financial, Inc.

Common Stock, par value $0.01 per share · CUSIP: 87877Q109

Event date: 2026-01-05

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

• A. Haag ShermanReported CIK 0001283832

  Shares: 2,101,000.00 · Class: 39.78%

• Sherman Tectonic FLP LP

  Shares: 370,000.00 · Class: 7.01%

• The Sherman 2018 Irrevocable Trust

  Shares: 1,719,000.00 · Class: 32.55%

• George L. Ball

  Shares: 208,457.00 · Class: 3.95%

• Darrell W. Cain

  Shares: 213,100.00 · Class: 4.04%

• Michelle Baird

  Shares: 67,740.00 · Class: 1.27%

• The Bolt Family Irrevocable Trust

  Shares: 349,417.00 · Class: 6.62%

• IF Holdings, LLC

  Shares: 123,030.00 · Class: 2.33%

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