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Mark A. Maples

GSBC
INSIDER · GREAT SOUTHERN BANCORP, INC. · CIK 0001868939
FILING MIX · LIFETIME58%/42%
BUYS
39
SELLS
28
TOTAL VALUE
$3.20M
COMPANIES
1
ACTIVE SINCE
Nov 2021
HOLDINGS NOW
3,587
AVG SELL PX
$60.39
TRADE KIND
SHOWING 67 / 67
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
9 backtested trades · 8 horizons · 9 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Mark A. Maples, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d9+44.44%-0.30%+0.25%-0.55%-0.17%—
14d9+66.67%-1.75%-0.64%-1.11%-1.26%—
30d9+66.67%-1.86%-0.08%-2.53%-1.59%—
60d9+66.67%-2.79%+1.16%-3.95%-6.03%—
90d9(1 pending)+75.00%-5.34%-0.40%-4.94%-6.82%—
180d9(1 pending)+75.00%-5.84%-0.03%-9.16%-11.73%—
1y9(2 pending)+85.71%-7.85%+5.98%-13.82%-19.82%—
2y9(5 pending)+75.00%-7.10%+29.35%-36.45%-40.44%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
GSBC · 3,587 shares · as of May 1, 2026
02,3944,7877,1819,57420222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 39 buys / 28 sellsCOVERAGE · 19 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
1,187$57.98$68.8K1,187May 1, 2026May 4, 2026 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
1,187$57.98$68.8K1,187May 1, 2026May 4, 2026 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
2,387$68.96$164.6K0May 1, 2026May 4, 2026 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
1,200$61.55$73.9K2,387May 1, 2026May 4, 2026 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
1,200$61.55$73.9K3,587May 1, 2026May 4, 2026 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
1,200$53.22$63.9K1,450Nov 25, 2025Dec 1, 2025 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
250$41.74$10.4K0Nov 25, 2025Dec 1, 2025 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
1,200$53.22$63.9K9,574Nov 25, 2025Dec 1, 2025 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
250$41.74$10.4K250Nov 25, 2025Dec 1, 2025 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
1,450$59.93$86.9K0Nov 25, 2025Dec 1, 2025 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$57.29$68.7K2,400Nov 19, 2025Nov 20, 2025 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$57.29$68.7K3,600Nov 19, 2025Nov 20, 2025 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$57.29$68.7K1,200Nov 19, 2025Nov 20, 2025 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$57.29$68.7K4,800Nov 19, 2025Nov 20, 2025 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
1,188$57.98$68.9K1,400Nov 27, 2024Dec 2, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
2,600$63.42$164.9K0Nov 27, 2024Dec 2, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
1,200$61.55$73.9K6,224Nov 27, 2024Dec 2, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
212$60.15$12.8K212Nov 27, 2024Dec 2, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
1,188$57.98$68.9K2,624Nov 27, 2024Dec 2, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
1,200$61.55$73.9K2,600Nov 27, 2024Dec 2, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
212$60.15$12.8K0Nov 27, 2024Dec 2, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$61.79$74.1K2,400Nov 20, 2024Nov 22, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$61.79$74.1K1,200Nov 20, 2024Nov 22, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$61.79$74.1K4,800Nov 20, 2024Nov 22, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$61.79$74.1K3,600Nov 20, 2024Nov 22, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
1,188$57.98$68.9K2,074Nov 6, 2024Nov 8, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
1,188$57.98$68.9K4,024Nov 6, 2024Nov 8, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
212$60.15$12.8K636Nov 6, 2024Nov 8, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
424$55.00$23.3K424Nov 6, 2024Nov 8, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
250$41.74$10.4K886Nov 6, 2024Nov 8, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
212$60.15$12.8K212Nov 6, 2024Nov 8, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
250$41.74$10.4K462Nov 6, 2024Nov 8, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
2,074$67.19$139.3K0Nov 6, 2024Nov 8, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
424$55.00$23.3K0Nov 6, 2024Nov 8, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
250$41.74$10.4K250Jul 22, 2024Jul 22, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
250$61.51$15.4K0Jul 22, 2024Jul 22, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
250$41.74$10.4K500Jul 22, 2024Jul 22, 2024 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$53.22$63.9K3,600Nov 15, 2023Nov 16, 2023 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$53.22$63.9K2,400Nov 15, 2023Nov 16, 2023 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$53.22$63.9K4,800Nov 15, 2023Nov 16, 2023 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$53.22$63.9K1,200Nov 15, 2023Nov 16, 2023 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
213$60.15$12.8K400Nov 25, 2022Nov 28, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
400$62.23$24.9K0Nov 25, 2022Nov 28, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
187$52.20$9.8K0Nov 25, 2022Nov 28, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
187$52.20$9.8K187Nov 25, 2022Nov 28, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
213$60.15$12.8K848Nov 25, 2022Nov 28, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$61.55$73.9K3,600Nov 16, 2022Nov 17, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$61.55$73.9K2,400Nov 16, 2022Nov 17, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$61.55$73.9K1,200Nov 16, 2022Nov 17, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,200$61.55$73.9K4,800Nov 16, 2022Nov 17, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
250$41.74$10.4K1,998Oct 31, 2022Oct 31, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
250$62.26$15.6K0Oct 31, 2022Oct 31, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
250$41.74$10.4K250Oct 31, 2022Oct 31, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
213$55.00$11.7K611Feb 8, 2022Feb 9, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
213$60.15$12.8K613Feb 8, 2022Feb 9, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
187$52.20$9.8K187Feb 8, 2022Feb 9, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
213$55.00$11.7K400Feb 8, 2022Feb 9, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
613$61.23$37.5K0Feb 8, 2022Feb 9, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
213$60.15$12.8K1,248Feb 8, 2022Feb 9, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
187$52.20$9.8K187Feb 8, 2022Feb 9, 2022 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,188$57.98$68.9K1,188Nov 17, 2021Nov 18, 2021 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,187$57.98$68.8K3,563Nov 17, 2021Nov 18, 2021 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,187$57.98$68.8K4,750Nov 17, 2021Nov 18, 2021 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASEGRANT
Stock grant
1,188$57.98$68.9K2,376Nov 17, 2021Nov 18, 2021 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
PURCHASE
187$41.30$7.7K187Nov 5, 2021Nov 5, 2021 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
187$41.30$7.7K0Nov 5, 2021Nov 5, 2021 ↗View →
GSBC
GREAT SOUTHERN BANCORP, INC.
SALE
187$57.64$10.8K0Nov 5, 2021Nov 5, 2021 ↗View →
Other insiders · GSBC
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About this filer
CIK 0001868939
ROLE
Insider
PRIMARY
GSBC
COMPANIES
1
ACTIVE SINCE
Nov 2021
MARKETPEEL · /INSIDER/0001868939DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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One short email. Insider buys, congressional trades, and plain-English analysis.

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