Magnolia Oil & Gas Corporation
US ˙ NYSE ˙ US5596631094

SecurityMGY / Magnolia Oil & Gas Corporation
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership1,769 shares
Latest Disclosed Value $ 38,723
Parallel Advisors, LLC ownership in MGY / Magnolia Oil & Gas Corporation

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 1,769 shares of Magnolia Oil & Gas Corporation (US:MGY) valued at $38,723 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 984 shares of Magnolia Oil & Gas Corporation. This represents a change in shares of 79.78% during the quarter. The current value of the position is $49,461 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (MGY) 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.

MGY / Magnolia Oil & Gas Corporation 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 MAGNOLIA OIL & GAS CORP CL A Stock 559663109 1,769 785 79.78 39 65.22 0.0007
2025-11-13 2025-09-30 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 984 -49 -4.74 23 0.00 0.0004
2025-07-08 2025-06-30 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 1,033 -1,275 -55.24 23 -60.34 0.0005
2025-04-08 2025-03-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 2,308 1,272 122.78 58 141.67 0.0013
2025-02-10 2024-12-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 1,036 46 4.65 24 0.00 0.0005
2024-11-13 2024-09-30 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 990 -78 -7.30 24 -11.11 0.0006
2024-08-08 2024-06-30 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 1,068 184 20.81 27 22.73 0.0007
2024-05-06 2024-03-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 884 -544 -38.10 23 -26.67 0.0006
2024-02-12 2023-12-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 1,428 229 19.10 30 11.11 0.0009
2024-05-20 2023-09-30 13F/A-1 MAGNOLIA OIL & GAS CORP CL A Stock 559663109 1,199 469 64.25 27 80.00 0.0009
2023-11-14 2023-09-30 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 1,199 469 27 0.0009
2024-05-20 2023-06-30 13F/A-1 MAGNOLIA OIL & GAS CORP CL A Stock 559663109 730 -1,763 -70.72 15 -72.22 0.0005
2023-08-04 2023-06-30 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 730 -1,763 15 0.0005
2024-05-20 2023-03-31 13F/A-1 MAGNOLIA OIL & GAS CORP CL A Stock 559663109 2,493 1,773 246.25 55 237.50 0.0018
2023-04-25 2023-03-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 2,493 1,773 55 0.0018
2023-02-06 2022-12-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 720 28 4.05 17 14.29 0.0007
2022-11-10 2022-09-30 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 692 38 5.81 14 0.00 0.0006
2022-08-01 2022-06-30 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 654 -45 -6.44 14 -17.65 0.0006
2022-04-28 2022-03-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 699 -50 -6.68 17 21.43 0.0007
2022-01-20 2021-12-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 749 45 6.39 14 7.69 0.0005
2021-11-02 2021-09-30 13F/A-1 MAGNOLIA OIL & GAS CORP CL A Stock 559663109 704 107 17.92 13 44.44 0.0005
2021-08-06 2021-06-30 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 597 0 0.00 9 28.57 0.0004
2021-04-23 2021-03-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 597 0 0.00 7 75.00 0.0003
2021-02-02 2020-12-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 597 -277 -31.69 4 -20.00 0.0002
2020-10-27 2020-09-30 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 874 0 0.00 5 0.00 0.0003
2020-07-16 2020-06-30 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 874 314 56.07 5 150.00 0.0003
2020-04-27 2020-03-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 560 -231 -29.20 2 -80.00 0.0002
2020-01-30 2019-12-31 13F MAGNOLIA OIL & GAS CORP CL A Stock 559663109 791 791 10 0.0008
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 MAGNOLIA OIL & GAS CORP CL A Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F MAGNOLIA OIL & GAS CORP CL A Stock Call 597 9 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.