SEC Form 4
Great Southern Bancorp Inc (GSBC) insider trading
In the 12 months to Oct 24, 2026, 9 GSBC insiders reported open-market sales of $3.2M across 16 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $3.2M
- 16 filings · 9 insiders
- Open-market purchases
- $0
- 0 filings
Who traded GSBC, and when
- Sale
GSBC daily close from Oct 24, 2025 to Oct 23, 2026, between $55.67 and $82.02, last $80.93. 16 sale and 0 purchase filings by 9 insiders, marked at their filing dates. Joseph W. Turner, President/CEO: sold $773.4K across 2 filings, first filed Jan 27, 2026, last May 1, 2026. William V. Turner, Director: sold $768.3K across 2 filings, first filed Jan 29, 2026, last May 19, 2026. Earl A. Steinert Jr., Director: sold $417.5K across 2 filings, first filed Feb 4, 2026, last May 26, 2026. Rex A. Copeland, Treasurer: sold $316.2K across 2 filings, first filed Feb 6, 2026, last May 1, 2026. John M. Bugh, Other: sold $270.0K across 2 filings, first filed Nov 12, 2025, last Apr 21, 2026. Mark A. Maples, Other: sold $251.5K across 2 filings, first filed Dec 1, 2025, last May 4, 2026. 3 others: sold $427.6K across 4 filings, first filed Jan 29, 2026, last Aug 20, 2026.
Largest mark · tap a row for others
William V. Turner · Director
Sale $410,104
6,000 shares at $68.35 avg
Filed May 19, 2026 · traded May 18
Close on filing date $68.46
Joseph W. Turner · President/CEO
President/CEO
$773.4K soldWilliam V. Turner · Director
Director
$768.3K soldEarl A. Steinert Jr. · Director
Director
$417.5K soldRex A. Copeland · Treasurer
Treasurer
$316.2K soldJohn M. Bugh · Other
Other
$270.0K soldMark A. Maples · Other
Other
$251.5K sold3 others
Combined, one mark per week
$427.6K soldHas Great Southern Bancorp Inc's CEO sold stock?
Yes. Joseph W. Turner (CEO) sold 12,000 shares ($773.4K) between Jan 2026 and May 2026.
Open-market trades
16 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Joseph W. Turner | President/CEO | $773.4K | — | 2 | — | |
| William V. Turner | Director | $768.3K | — | 2 | — | |
| Earl A. Steinert Jr. | Director | $417.5K | — | 2 | — | |
| Rex A. Copeland | Treasurer | $316.2K | — | 2 | — | |
| John M. Bugh | Other | $270.0K | — | 2 | — | |
| Mark A. Maples | Other | $251.5K | — | 2 | — | |
| Kevin L. Baker | Other | $195.9K | — | 1 | — | |
| Thomas J. Carlson | Director | $162.7K | — | 2 | — | |
| Julie A. Brown | Director | $68.9K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Julie A. Brown Director | Sale | 851 | $81.00 | $68.9K | 7,052 | |
traded | Earl A. Steinert Jr. Director | Sale | 4,500 | $71.62 | $322.3K | 939,596 | |
traded | William V. Turner Director | Sale | 6,000 | $68.35 | $410.1K | 199,112 | |
traded | Kevin L. Baker Other | Sale | 2,800 | $69.96 | $195.9K | 14 | |
traded | Mark A. Maples Other | Sale | 2,387 | $68.96 | $164.6K | 0 | |
traded | Joseph W. Turner President/CEO | Sale | 6,000 | $68.16 | $409.0K | 136,182 | |
traded | Rex A. Copeland Treasurer | Sale | 2,950 | $68.41 | $201.8K | 25,921 | |
traded | John M. Bugh Other | Sale | 2,500 | $67.59 | $169.0K | 1,790 | |
traded | Rex A. Copeland Treasurer | Sale | 1,797 | $63.67 | $114.4K | 24,671 | |
traded | Thomas J. Carlson Director | Sale | 680 | $63.17 | $43.0K | 17,206 | |
traded | Earl A. Steinert Jr. Director | Sale | 1,500 | $63.49 | $95.2K | 939,596 | |
traded | William V. Turner Director | Sale | 6,000 | $59.70 | $358.2K | 199,112 | |
traded | Thomas J. Carlson Director | Sale | 2,000 | $59.89 | $119.8K | 100 | |
traded | Joseph W. Turner President/CEO | Sale | 6,000 | $60.74 | $364.4K | 137,382 | |
traded | Mark A. Maples Other | Sale | 1,450 | $59.93 | $86.9K | 0 | |
traded | John M. Bugh Other | Sale | 1,750 | $57.72 | $101.0K | 1,790 |
GET /stocks/filings/vX/form-4?tickers=GSBC&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"GSBC"
],
"issuer_cik": "0000854560",
"owner_cik": "0001179760",
"accession_number": "0001214659-26-010653",
"form_type": "4",
"filing_date": "2026-08-20",
"period_of_report": "2026-08-17",
"issuer_name": "GREAT SOUTHERN BANCORP, INC.",
"issuer_trading_symbol": "GSBC",
"owner_name": "BROWN JULIE A",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-08-17",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 851,
"transaction_price_per_share": 81,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 7052,
"transaction_value": 68931,
"direct_or_indirect": "I",
"nature_of_ownership": "Children's Accounts"
},
{
"tickers": [
"GSBC"
],
"issuer_cik": "0000854560",
"owner_cik": "0001284362",
"accession_number": "0001214659-26-006741",
"form_type": "4",
"filing_date": "2026-05-26",
"period_of_report": "2026-05-26",
"issuer_name": "GREAT SOUTHERN BANCORP, INC.",
"issuer_trading_symbol": "GSBC",
"owner_name": "STEINERT EARL A JR",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-05-26",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 4500,
"transaction_price_per_share": 71.6157,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 939596,
"transaction_value": 322270.65,
"direct_or_indirect": "D"
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 49 records
- Option exercises23 records
- Gifts2 records
- Other24 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for GSBC every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.