Magnolia Oil & Gas Corporation
US ˙ NYSE ˙ US5596631094

SecurityMGY / Magnolia Oil & Gas Corporation
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership7,028,781 shares
Latest Disclosed Value $ 221,910,425
Dimensional Fund Advisors Lp reports 5.95% increase in ownership of MGY / Magnolia Oil & Gas Corporation

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 7,028,781 shares of Magnolia Oil & Gas Corporation (US:MGY) valued at $221,898,616 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 6,634,362 shares of Magnolia Oil & Gas Corporation. This represents a change in shares of 5.95% during the quarter. The current value of the position is $193,361,765 USD.

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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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)
2026-05-07 2026-03-31 13F MAGNOLIA OIL & GAS CL A 559663109 7,028,781 394,419 5.95 221,910 52.80 0.0099
2026-02-12 2025-12-31 13F MAGNOLIA OIL & GAS CL A 559663109 6,634,362 264,649 4.15 145,230 -4.49 0.0305
2025-11-12 2025-09-30 13F MAGNOLIA OIL & GAS CL A 559663109 6,369,713 283,444 4.66 152,051 11.13 0.0326
2025-08-12 2025-06-30 13F MAGNOLIA OIL & GAS CL A 559663109 6,086,269 720,377 13.43 136,828 0.95 0.0317
2025-05-13 2025-03-31 13F MAGNOLIA OIL & GAS CL A 559663109 5,365,892 597,845 12.54 135,541 21.59 0.0337
2025-02-13 2024-12-31 13F MAGNOLIA OIL & GAS CL A 559663109 4,768,047 86,166 1.84 111,475 -2.50 0.0268
2024-11-07 2024-09-30 13F MAGNOLIA OIL & GAS CL A 559663109 4,681,881 161,156 3.56 114,329 -0.20 0.0277
2024-08-09 2024-06-30 13F MAGNOLIA OIL & GAS CL A 559663109 4,520,725 627,933 16.13 114,554 13.40 0.0299
2024-05-10 2024-03-31 13F MAGNOLIA OIL & GAS CL A 559663109 3,892,792 386,750 11.03 101,018 35.33 0.0273
2024-02-07 2023-12-31 13F MAGNOLIA OIL & GAS CL A 559663109 3,506,042 257,806 7.94 74,647 0.30 0.0218
2023-11-09 2023-09-30 13F MAGNOLIA OIL & GAS CL A 559663109 3,248,236 170,045 5.52 74,421 15.68 0.0244
2023-08-09 2023-06-30 13F MAGNOLIA OIL & GAS CL A 559663109 3,078,191 447,522 17.01 64,332 11.77 0.0205
2023-05-12 2023-03-31 13F MAGNOLIA OIL & GAS CL A 559663109 2,630,669 154,054 6.22 57,555 99,132.76 0.0194
2023-02-09 2022-12-31 13F MAGNOLIA OIL & GAS CL A 559663109 2,476,615 149,814 6.44 58 -99.87 0.0172
2022-11-10 2022-09-30 13F MAGNOLIA OIL & GAS CL A 559663109 2,326,801 57,049 2.51 46,092 -3.27 0.0177
2022-08-12 2022-06-30 13F MAGNOLIA OIL & GAS CL A 559663109 2,269,752 323,175 16.60 47,651 3.49 0.0171
2022-05-13 2022-03-31 13F MAGNOLIA OIL & GAS CLA 559663109 1,946,577 355,780 22.36 46,044 53.38 0.0142
2022-02-09 2021-12-31 13F MAGNOLIA OIL & GAS CLA 559663109 1,590,797 161,325 11.29 30,019 18.05 0.0091
2021-11-12 2021-09-30 13F MAGNOLIA OIL & GAS CLA 559663109 1,429,472 573,658 67.03 25,429 90.11 0.0082
2021-08-12 2021-06-30 13F MAGNOLIA OIL & GAS CLA 559663109 855,814 498,568 139.56 13,376 226.16 0.0042
2021-05-14 2021-03-31 13F MAGNOLIA OIL & GAS CLA 559663109 357,246 324,375 986.81 4,101 976.38 0.0014
2019-08-13 2019-06-30 13F MAGNOLIA OIL & GAS CLA 559663109 32,871 -102 -0.31 381 -3.79 0.0001
2019-08-12 2019-03-31 13F/A-2 MAGNOLIA OIL & GAS CLA 559663109 32,973 16,791 103.76 396 118.78 0.0002
2019-05-10 2019-03-31 13F MAGNOLIA OIL & GAS CLA 559663109 32,973 16,791 396
2019-02-26 2018-12-31 13F/A-1 MAGNOLIA OIL & GAS CLA 559663109 16,182 16,182 181 0.0001
2019-02-13 2018-12-31 13F MAGNOLIA OIL & GAS CLA 559663109 16,182 181 0.0001
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.