Nasdaq · CIK 0000854560
GSBC GREAT SOUTHERN BANCORP, INC.
Insider trading from SEC Form 4. Last filing May 26, 2026. Close $76.75 on Oct 9, 2026, +41% from the 52-week low and -6% from the high.
GREAT SOUTHERN BANCORP, INC. (GSBC) has 80 SEC Form 4 filings on file from 13 insiders, the latest filed on May 26, 2026. No insider bought or sold on the open market in the last 90 days; rows filed in that time are grants, exercises, tax withholding and other transactions that carry no view on the price.
22 open-market trades have been scored at GSBC. The newest: Earl A Steinert Jr (director) sold $322k of stock on May 26, 2026, filed May 26, 2026, scored 22 (weak). The largest of the 22 shown: William Turner V (director) sold $410k on May 18, 2026, scored 31 (weak). 2 insiders sold within 14 days of each other around May 26, 2026.
GSBC closed at $76.75 on Oct 9, 2026, 41% above its 52-week low and 6% below its 52-week high.
9 Form 144 notices of planned sales are on file, the latest filed Nov 25, 2025.
Last 90 days
Price and insider trades, last year
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at GREAT SOUTHERN BANCORP, INC., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 22Weak | Earl A Steinert Jr director sell | $322k 4,500 shares | -0% | +32% from low0% from high | |
| 31Weak | William Turner V director sell | $410k 6,000 shares | -3% | +28% from low-2% from high | |
| 40Moderate | Kevin L Baker other sell | $196k 2,800 shares | -100% | +30% from low0% from high | |
| 39Weak | Mark A Maples other sell | $165k 2,387 shares | -100% | +28% from low0% from high | |
| 39Weak | Rex A Copeland Treasurer sell | $202k 2,950 shares | -11% | +28% from low-1% from high | |
| 41Moderate | Joseph W Turner President/CEO sell | $409k 6,000 shares | -4% | +28% from low-1% from high | |
| 39Weak | John M Bugh other sell | $169k 2,500 shares | -58% | +29% from low-2% from high | |
| 32Weak | Rex A Copeland Treasurer sell | $114k 1,797 shares | -7% | +29% from low-4% from high | |
| 36Weak | Thomas J Carlson director sell | $43k 680 shares | -4% | +27% from low-6% from high | |
| 25Weak | Earl A Steinert Jr director sell | $95k 1,500 shares | -0% | +28% from low-5% from high | |
| 45Moderate | Thomas J Carlson director sell | $120k 2,000 shares | -95% | +20% from low-11% from high | |
| 30Weak | William Turner V director sell | $358k 6,000 shares | -3% | +20% from low-11% from high | |
| 40Moderate | Joseph W Turner President/CEO sell | $364k 6,000 shares | -4% | +22% from low-10% from high | |
| 22Weak | Mark A Maples other sell | $87k 1,450 shares | -100% | +21% from low-7% from high | |
| 13Weak | John M Bugh other sell | $101k 1,750 shares | -49% | +16% from low-11% from high | |
| 27Weak | Kevin L Baker other sell | $300k 5,000 shares | -100% | - | |
| 39Weak | Mark A Maples other sell | $165k 2,600 shares | -100% | - | |
| 26Weak | Julie A Brown director sell | $153k 2,500 shares | -7% | - | |
| 31Weak | William Turner V director sell | $378k 6,000 shares | -3% | - | |
| 41Moderate | Rex A Copeland Treasurer sell | $280k 4,200 shares | -16% | - | |
| 39Weak | Mark A Maples other sell | $139k 2,074 shares | -100% | - | |
| 41Moderate | Joseph W Turner President/CEO sell | $400k 6,000 shares | -4% | - |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Nov 25, 2025 | MARK MAPLES Vice President of Subsidiary | 1,450 0.01% of outstanding | $87k | Nov 25, 2025 | none |
| Nov 10, 2025 | JOHN BUGH Vice President of Subsidiary | 1,750 0.02% of outstanding | $101k | Nov 10, 2025 | none |
| Feb 6, 2025 | Baker Kevin L Officer | 5,000 0.04% of outstanding | $300k | Feb 6, 2025 | none |
| Nov 27, 2024 | Maples Mark A Officer | 2,600 0.02% of outstanding | $167k | Nov 27, 2024 | $139k |
| Nov 19, 2024 | BROWN JULIE A Director | 2,500 0.02% of outstanding | $153k | Nov 19, 2024 | none |
| Nov 14, 2024 | TURNER WILLIAM V Director | 6,000 0.05% of outstanding | $380k | Nov 14, 2024 | none |
| Nov 6, 2024 | COPELAND REX A Officer | 4,200 0.04% of outstanding | $277k | Nov 6, 2024 | none |
| Nov 6, 2024 | TURNER JOSEPH W Officer | 6,000 0.05% of outstanding | $400k | Nov 6, 2024 | none |
| Nov 6, 2024 | Maples Mark A Officer | 2,074 0.02% of outstanding | $118k | Nov 6, 2024 | none |
Transactions
The newest 50 of 247 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| May 26, 2026 | Earl A Steinert Jr director | MOption exercise Common stock | +2,000 | $60.15 | $120k | 941,596 | May 26, 2026 |
| May 26, 2026 | Earl A Steinert Jr director | MOption exercise Common stock | +1,500 | $57.98 | $87k | 943,096 | May 26, 2026 |
| May 26, 2026 | Earl A Steinert Jr director | MOption exercise Common stock | +1,000 | $61.55 | $62k | 944,096 | May 26, 2026 |
| May 26, 2026 | Earl A Steinert Jr director | SOpen-market sale Common stock | -4,500 | $71.62 | $322k | 939,596 | May 26, 2026 |
| May 26, 2026 | Earl A Steinert Jr director | MOption exercise Option to purchasederivative | -2,000 | $60.15 | $120k | 0 | May 26, 2026 |
| May 26, 2026 | Earl A Steinert Jr director | MOption exercise Option to purchasederivative | -1,500 | $57.98 | $87k | 500 | May 26, 2026 |
| May 26, 2026 | Earl A Steinert Jr director | MOption exercise Option to purchasederivative | -1,000 | $61.55 | $62k | 1,500 | May 26, 2026 |
| Apr 14, 2026 | Debra Mallonee Hart director | JOther Common Stock | +13 | $67.28 | $875 | 2,013 | May 20, 2026 |
| May 18, 2026 | William Turner V director | MOption exercise Common stock | +6,000 | $52.20 | $313k | 205,112 | May 19, 2026 |
| May 18, 2026 | William Turner V director | SOpen-market sale Common stock | -6,000 | $68.35 | $410k | 199,112 | May 19, 2026 |
| May 18, 2026 | William Turner V director | MOption exercise Option to purchasederivative | -6,000 | $52.20 | $313k | 0 | May 19, 2026 |
| Apr 14, 2026 | Steven D Edwards director | JOther Common stock | +26 | $67.97 | $1,767 | 4,108 | May 14, 2026 |
| Apr 14, 2026 | Douglas M Pitt director | JOther Common stock | +54 | $67.28 | $3,633 | 11,593 | May 14, 2026 |
| Apr 14, 2026 | Julie A Brown director | JOther Common stockindirect: Children's Accounts | +50 | $67.56 | $3,378 | 7,860 | May 14, 2026 |
| Apr 14, 2026 | Thomas J Carlson director | JOther Common stockindirect: Spouse | +109 | $67.57 | $7,366 | 17,315 | May 14, 2026 |
| May 6, 2026 | Kevin L Baker other | MOption exercise Common Stock | +2,800 | $52.20 | $146k | 2,814 | May 6, 2026 |
| May 6, 2026 | Kevin L Baker other | SOpen-market sale Common Stock | -2,800 | $69.96 | $196k | 14 | May 6, 2026 |
| May 6, 2026 | Kevin L Baker other | MOption exercise Option to purchasederivative | -2,800 | $52.20 | $146k | 0 | May 6, 2026 |
| May 1, 2026 | Mark A Maples other | MOption exercise Common Stock | +1,187 | $57.98 | $69k | 1,187 | May 4, 2026 |
| May 1, 2026 | Mark A Maples other | MOption exercise Common Stock | +1,200 | $61.55 | $74k | 2,387 | May 4, 2026 |
| May 1, 2026 | Mark A Maples other | SOpen-market sale Common Stock | -2,387 | $68.96 | $165k | 0 | May 4, 2026 |
| May 1, 2026 | Mark A Maples other | MOption exercise Option to purchasederivative | -1,187 | $57.98 | $69k | 1,187 | May 4, 2026 |
| May 1, 2026 | Mark A Maples other | MOption exercise Option to purchasederivative | -1,200 | $61.55 | $74k | 3,587 | May 4, 2026 |
| Apr 30, 2026 | Rex A Copeland Treasurer | MOption exercise Common stock | +2,036 | $52.20 | $106k | 26,707 | May 1, 2026 |
| Apr 30, 2026 | Joseph W Turner President/CEO | MOption exercise Common stock | +6,000 | $52.20 | $313k | 142,182 | May 1, 2026 |
| Apr 30, 2026 | Rex A Copeland Treasurer | SOpen-market sale Common stock | -2,036 | $68.25 | $139k | 24,671 | May 1, 2026 |
| Apr 30, 2026 | Joseph W Turner President/CEO | SOpen-market sale Common stock | -6,000 | $68.16 | $409k | 136,182 | May 1, 2026 |
| May 1, 2026 | Rex A Copeland Treasurer | MOption exercise Common stock | +1,250 | $52.20 | $65k | 25,921 | May 1, 2026 |
| Apr 14, 2026 | Joseph W Turner President/CEO | JOther Common stockindirect: Children's Trust | +17 | $67.57 | $1,149 | 11,395 | May 1, 2026 |
| May 1, 2026 | Rex A Copeland Treasurer | MOption exercise Common stock | +914 | $52.20 | $48k | 26,835 | May 1, 2026 |
| May 1, 2026 | Rex A Copeland Treasurer | SOpen-market sale Common stock | -914 | $68.77 | $63k | 25,921 | May 1, 2026 |
| Apr 30, 2026 | Rex A Copeland Treasurer | MOption exercise Option to purchasederivative | -2,036 | $52.20 | $106k | 2,164 | May 1, 2026 |
| May 1, 2026 | Rex A Copeland Treasurer | MOption exercise Option to purchasederivative | -1,250 | $52.20 | $65k | 914 | May 1, 2026 |
| Apr 30, 2026 | Joseph W Turner President/CEO | MOption exercise Option to purchasederivative | -6,000 | $52.20 | $313k | 0 | May 1, 2026 |
| May 1, 2026 | Rex A Copeland Treasurer | MOption exercise Option to purchasederivative | -914 | $52.20 | $48k | 0 | May 1, 2026 |
| Apr 20, 2026 | John M Bugh other | MOption exercise Common stock | +2,500 | $41.30 | $103k | 4,290 | Apr 21, 2026 |
| Apr 20, 2026 | John M Bugh other | SOpen-market sale Common stock | -2,500 | $67.59 | $169k | 1,790 | Apr 21, 2026 |
| Apr 20, 2026 | John M Bugh other | MOption exercise Common stockderivative | -2,500 | $41.30 | $103k | 0 | Apr 21, 2026 |
| Feb 23, 2026 | Kevin R Ausburn director | MOption exercise Common Stock | +5,000 | $51.40 | $257k | 6,300 | Feb 24, 2026 |
| Feb 23, 2026 | Joseph W Turner President/CEO | GGift Common stock | -1,200 | $61.82 | $74k | 136,182 | Feb 24, 2026 |
| Feb 23, 2026 | Kevin R Ausburn director | MOption exercise Common Stock | +2,000 | $52.20 | $104k | 8,300 | Feb 24, 2026 |
| Feb 23, 2026 | Kevin R Ausburn director | MOption exercise Option to purchasederivative | -5,000 | $51.40 | $257k | 0 | Feb 24, 2026 |
| Feb 23, 2026 | Kevin R Ausburn director | MOption exercise Option to purchasederivative | -2,000 | $52.20 | $104k | 0 | Feb 24, 2026 |
| Jan 13, 2026 | Douglas M Pitt director | JOther Common stock | +58 | $62.29 | $3,613 | 11,539 | Feb 17, 2026 |
| Jan 13, 2026 | Debra Mallonee Hart director | JOther Common Stock | +13 | $62.29 | $810 | 2,000 | Feb 17, 2026 |
| Jan 13, 2026 | Steven D Edwards director | JOther Common stock | +28 | $62.79 | $1,758 | 4,082 | Feb 17, 2026 |
| Jan 13, 2026 | Julie A Brown director | JOther Common stockindirect: Children's Accounts | +53 | $62.37 | $3,306 | 7,810 | Feb 17, 2026 |
| Feb 6, 2026 | Rex A Copeland Treasurer | MOption exercise Common stock | +1,797 | $41.30 | $74k | 26,468 | Feb 6, 2026 |
| Feb 6, 2026 | Rex A Copeland Treasurer | SOpen-market sale Common stock | -1,797 | $63.67 | $114k | 24,671 | Feb 6, 2026 |
| Feb 6, 2026 | Rex A Copeland Treasurer | MOption exercise Option to purchasederivative | -1,797 | $41.30 | $74k | 0 | Feb 6, 2026 |
Insiders
Everyone who has filed a Form 4 here.
- Kevin R Ausburndirector
- Julie A Browndirector
- Kevin L Bakerother
- John M Bughother
- Thomas J Carlsondirector
- Rex A CopelandTreasurer
- Steven D Edwardsdirector
- Debra Mallonee Hartdirector
- Mark A Maplesother
- Douglas M Pittdirector
- Earl A Steinert Jrdirector
- Joseph W TurnerPresident/CEO
- William Turner Vdirector
Questions about GSBC
Answered from the filings on this page, as of the latest one.
Are insiders buying GSBC?
No. In the last 90 days no insider at GREAT SOUTHERN BANCORP, INC. bought or sold shares on the open market according to SEC Form 4 filings. The rows on file from that period are grants, exercises, tax withholding or other transactions, which carry no view on the price.
Who was the last insider to trade GSBC on the open market?
Earl A Steinert Jr (director) sold $322k of GSBC on May 26, 2026 and filed the Form 4 on May 26, 2026. InsiderTell scored 22 (weak), with 2 insiders on the same side within 14 days.
How many insiders file Form 4 at GREAT SOUTHERN BANCORP, INC.?
13 people have filed a Form 4 at GREAT SOUTHERN BANCORP, INC., among them Kevin R Ausburn (director), Julie A Brown (director), Kevin L Baker (insider). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.