Great Southern Bancorp, Inc.
US ˙ NasdaqGS ˙ US3909051076

SecurityGSBC / Great Southern Bancorp, Inc.
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership37 shares
Latest Disclosed Value $ 2,278
Parallel Advisors, LLC ownership in GSBC / Great Southern Bancorp, Inc.

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 37 shares of Great Southern Bancorp, Inc. (US:GSBC) valued at $2,278 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 50 shares of Great Southern Bancorp, Inc.. This represents a change in shares of -26.00% during the quarter. The current value of the position is $2,628 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (GSBC) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

GSBC / Great Southern Bancorp, Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-02-11 2025-12-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 37 -13 -26.00 2 -33.33 0.0000
2025-11-13 2025-09-30 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 50 13 35.14 3 50.00 0.0001
2025-07-08 2025-06-30 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 37 -393 -91.40 2 -91.30 0.0000
2025-04-08 2025-03-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 430 369 604.92 24 666.67 0.0005
2025-02-10 2024-12-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 61 0 0.00 4 0.00 0.0001
2024-11-13 2024-09-30 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 61 -29 -32.22 3 -40.00 0.0001
2024-08-08 2024-06-30 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 90 31 52.54 5 66.67 0.0001
2024-05-06 2024-03-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 59 -291 -83.14 3 -85.00 0.0001
2024-02-12 2023-12-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 350 8 2.34 21 25.00 0.0006
2024-05-20 2023-09-30 13F/A-1 GREAT SOUTHN BANCORP INC COM Stock 390905107 342 48 16.33 16 14.29 0.0005
2023-11-14 2023-09-30 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 342 48 16 0.0005
2024-05-20 2023-06-30 13F/A-1 GREAT SOUTHN BANCORP INC COM Stock 390905107 294 230 359.38 15 366.67 0.0005
2023-08-04 2023-06-30 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 294 230 15 0.0005
2024-05-20 2023-03-31 13F/A-1 GREAT SOUTHN BANCORP INC COM Stock 390905107 64 -139 -68.47 3 -75.00 0.0001
2023-04-25 2023-03-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 64 -139 3 0.0001
2023-02-06 2022-12-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 203 -83 -29.02 12 -25.00 0.0005
2022-11-10 2022-09-30 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 286 144 101.41 16 100.00 0.0007
2022-08-01 2022-06-30 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 142 -49 -25.65 8 -27.27 0.0004
2022-04-28 2022-03-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 191 -131 -40.68 11 -42.11 0.0004
2022-01-20 2021-12-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 322 0 0.00 19 5.56 0.0007
2021-11-02 2021-09-30 13F/A-1 GREAT SOUTHN BANCORP INC COM Stock 390905107 322 307 2,046.67 18 1,700.00 0.0007
2021-08-06 2021-06-30 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 15 0 0.00 1 0.00 0.0000
2021-04-23 2021-03-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 15 -7 -31.82 1 0.00 0.0000
2021-02-02 2020-12-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 22 22 1 0.0001
2018-05-08 2018-03-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 0 -86 -100.00 0 -100.00
2018-02-13 2017-12-31 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 86 -55 -39.01 4 -42.86 0.0007
2017-11-15 2017-09-30 13F/A-1 GREAT SOUTHN BANCORP INC COM Stock 390905107 141 0 0.00 7 0.00 0.0012
2017-08-07 2017-06-30 13F GREAT SOUTHN BANCORP INC COM Stock 390905107 141 141 7 0.0013
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F GREAT SOUTHN BANCORP INC COM Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F GREAT SOUTHN BANCORP INC COM Stock Call 15 1 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.