A Form 4 filed on August 18, 2026 with the U.S. Securities and Exchange Commission discloses a change in beneficial ownership of common stock by Thomas J. Carlson, a director of Great Southern Bancorp, Inc. (NASDAQ:GSBC), with the earliest reported transaction dated July 14, 2026.

Key Highlights

  • Reporting person: Thomas J. Carlson, identified as a Director of Great Southern Bancorp, Inc.
  • Transaction type: 96 shares of common stock acquired (code J) on July 14, 2026 at a price of $77.84 per share, held indirectly through spouse.
  • Voluntary disclosure: The filing notes the acquisition was a DRIP (dividend reinvestment plan) acquisition "exempt from Section 16 reporting being reported voluntarily."
  • Post-transaction indirect holdings: 17,411 shares of common stock beneficially owned indirectly through spouse following the reported transaction.
  • Options held directly: 18,000 total options to purchase common stock are listed across nine tranches, with exercise prices ranging from $41.74 to $61.79.
  • Filing signed: Matt Snyder, by Power of Attorney from Thomas J. Carlson, signed the filing on August 18, 2026.

Carlson's DRIP Acquisition and Options Portfolio at Great Southern Bancorp

According to the filing, Thomas J. Carlson, a director at Great Southern Bancorp, Inc. (NASDAQ:GSBC), acquired 96 shares of common stock on July 14, 2026 at $77.84 per share via a dividend reinvestment plan. The filing states this acquisition is "exempt from Section 16 reporting being reported voluntarily." Following the transaction, Carlson beneficially owns 17,411 shares indirectly through his spouse. The filing also reflects an unspecified disposition of 100 shares with no transaction date or price listed in the source document.

In Table II, the filing lists nine series of options to purchase common stock held directly by Carlson, totaling 18,000 options. The exercise prices for these tranches range from $41.74 to $61.79, with expiration dates spanning November 2027 through November 2035. Each tranche covers 2,000 shares of common stock, and each vests in four annual installments of 500 shares. For example, the most recent tranche carries an exercise price of $57.29 and an expiration date of November 19, 2035, with 500 shares vesting on each of November 19, 2027, 2028, 2029, and 2030, according to the filing.

The Form 4 was signed by Matt Snyder under a Power of Attorney from Thomas J. Carlson and filed on August 18, 2026. No transaction code checkbox indicating a Rule 10b5-1 plan was selected, according to the filing.

What Was Disclosed

The filing reports a voluntary disclosure of a DRIP acquisition of 96 shares of Great Southern Bancorp common stock by director Thomas J. Carlson at $77.84 per share on July 14, 2026, along with an inventory of 18,000 directly held stock options across nine tranches.