Magnolia Oil & Gas Corporation
US ˙ NYSE ˙ US5596631094

SecurityMGY / Magnolia Oil & Gas Corporation
InstitutionQUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series
Latest Disclosed Ownership322,962 shares
Latest Disclosed Value $ 7,260,185
QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series reports 9.42% increase in ownership of MGY / Magnolia Oil & Gas Corporation

On August 26, 2025 - QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series filed a NPORT-P form disclosing ownership of 322,962 shares of Magnolia Oil & Gas Corporation (US:MGY) valued at $7,260,186 USD as of June 30, 2025. The entity filed a previous NPORT-P on May 28, 2025 disclosing 295,159 shares of Magnolia Oil & Gas Corporation. This represents a change in shares of 9.42% during the quarter. The current value of the position is $8,884,685 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)
2025-08-26 2025-06-30 NP Magnolia Oil & Gas EC US5596631094 322,962 27,803 9.42 7,260 -2.62 0.1630
2025-05-28 2025-03-31 NP Magnolia Oil & Gas EC US5596631094 295,159 3,133 1.07 7,456 9.20 0.1788
2025-02-25 2024-12-31 NP Magnolia Oil & Gas EC US5596631094 292,026 -49,007 -14.37 6,828 -18.02 0.1491
2024-11-26 2024-09-30 NP Magnolia Oil & Gas EC US5596631094 341,033 5,879 1.75 8,328 -1.93 0.1575
2024-08-26 2024-06-30 NP Magnolia Oil & Gas EC US5596631094 335,154 24,942 8.04 8,493 5.49 0.1730
2024-05-28 2024-03-31 NP Magnolia Oil & Gas EC US5596631094 310,212 -15,654 -4.80 8,050 16.04 0.1680
2024-02-26 2023-12-31 NP Magnolia Oil & Gas EC US5596631094 325,866 14,725 4.73 6,938 -2.68 0.1481
2023-11-28 2023-09-30 NP Magnolia Oil & Gas EC US5596631094 311,141 -6,498 -2.05 7,128 7.38 0.1860
2023-08-25 2023-06-30 NP Magnolia Oil & Gas EC US5596631094 317,639 38,844 13.93 6,639 8.82 0.1574
2023-05-26 2023-03-31 NP Magnolia Oil & Gas EC US5596631094 278,795 11,446 4.28 6,100 -2.70 0.1624
2023-02-24 2022-12-31 NP Magnolia Oil & Gas EC US5596631094 267,349 447 0.17 6,269 18.57 0.1725
2022-11-25 2022-09-30 NP Magnolia Oil & Gas EC US5596631094 266,902 9,101 3.53 5,287 -2.29 0.1515
2022-08-25 2022-06-30 NP Magnolia Oil & Gas EC US5596631094 257,801 33,719 15.05 5,411 2.11 0.1494
2022-05-26 2022-03-31 NP Magnolia Oil & Gas EC US5596631094 224,082 4,736 2.16 5,300 28.03 0.1235
2022-02-25 2021-12-31 NP Magnolia Oil & Gas EC US5596631094 219,346 6,778 3.19 4,139 9.47 0.0898
2021-11-24 2021-09-30 NP Magnolia Oil & Gas EC US5596631094 212,568 0 0.00 3,782 13.82 0.0833
2021-08-26 2021-06-30 NP Magnolia Oil & Gas EC US5596631094 212,568 23,492 12.42 3,322 53.09 0.0713
2021-05-27 2021-03-31 NP Magnolia Oil & Gas EC US5596631094 189,076 -5,426 -2.79 2,171 58.05 0.0492
2021-02-25 2020-12-31 NP Magnolia Oil & Gas EC US5596631094 194,502 0 0.00 1,373 36.62 0.0352
2020-11-25 2020-09-30 NP Magnolia Oil & Gas EC US5596631094 194,502 -21,056 -9.77 1,006 -23.05 0.0323
2020-08-27 2020-06-30 NP Magnolia Oil & Gas EC US5596631094 215,558 50,818 30.85 1,306 98.48 0.0427
2020-06-01 2020-03-31 NP Magnolia Oil & Gas EC US5596631094 164,740 9,602 6.19 659 -66.27 0.0269
2020-02-27 2019-12-31 NP Magnolia Oil & Gas EC 559663109 155,138 1,725 1.12 1,952 14.63 0.0587
2019-11-27 2019-09-30 NP Magnolia Oil & Gas EC US5596631094 153,413 153,413 1,703 0.0563
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.