Latest Period
Q1 2026
Security Snapshot
Magnolia Oil & Gas Corp - COMMON STOCK (MGY) Institutional Ownership
CUSIP: 559663109
13F Institutional Holders and Ownership History from Q2 2018 to Q1 2026
Institutions Reporting
402
Shares (Excl. Options)
203,781,303
Price
$31.57
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- Security type / class
- Equity / COMMON STOCK
- Symbol
- MGY on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 203,781,303
- Total 13F value
- $6,385,467,884
- Portfolio coverage rank
- 0%
- Share change
- +2,775,875
- Value change
- +$188,350,022
- Number of holders
- 402
- Shares outstanding
- 186,201,471
- SEC-reported price per share
- $28.64
- Insider filing price
- $28.64
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- MGY - Magnolia Oil & Gas Corp - COMMON STOCK is tracked under CUSIP 559663109.
- 402 institutions reported positions in Q1 2026.
- 4 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 377 to 402 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $4,368,396,915 to $6,385,467,884.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 402 institutions filings for Q1 2026.
Security key
559663109
Latest holder period
Q1 2026
13F holders
402
13D/G owners
4
CIK / CUSIP context first
Open Q1 2026 holders
MGY full holder history
Magnolia Oil & Gas Corp SEC filings
Magnolia Oil & Gas Corp company facts
Magnolia Oil & Gas Corp insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 559663109:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
4
Security
MGY
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 14% | $589,581,498 | 27,207,268 | BlackRock, Inc. | 31 Mar 2025 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7% | $412,639,095 | 13,070,608 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| STATE STREET CORP | 5.1% | +8% | $281,944,405 | +$24,380,686 | 9,496,275 | +9.5% | STATE STREET CORPORATION | 31 Mar 2026 |
| FIRST TRUST PORTFOLIOS LP | 1.8% | -82% | $73,923,001 | -$335,308,470 | 3,411,306 | -82% | First Trust Portfolios L.P. | 31 Mar 2025 |
As of 31 Mar 2026, 402 institutional investors reported holding 203,781,303 shares of Magnolia Oil & Gas Corp - COMMON STOCK (MGY). This represents 109% of the company’s total 186,201,471 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
81%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 16% | 29,491,149 | +6.6% | 0.02% | $931,035,564 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7% | 12,983,395 | 0% | 0.02% | $409,885,780 |
| AMERICAN CENTURY COMPANIES INC | 5.6% | 10,509,240 | -4.7% | 0.17% | $331,776,745 |
| STATE STREET CORP | 5.1% | 9,496,275 | +7.9% | 0.01% | $299,797,402 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.9% | 7,188,424 | 0% | 0.01% | $226,938,546 |
| DIMENSIONAL FUND ADVISORS LP | 3.8% | 7,028,781 | +5.9% | 0.05% | $221,910,425 |
| JANUS HENDERSON GROUP PLC | 3.4% | 6,279,636 | +2.8% | 0.09% | $198,247,716 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 3.4% | 6,263,808 | +791% | 0.11% | $197,748,419 |
| T. Rowe Price Investment Management, Inc. | 2.8% | 5,193,887 | +30% | 0.11% | $163,972,000 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 2.7% | 4,972,261 | +0.26% | 0.27% | $156,974,000 |
| TD Asset Management Inc | 2.7% | 4,941,979 | -13% | 0.13% | $156,018,277 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 4,538,112 | +2.3% | 0.01% | $143,303,408 |
| ALLIANCEBERNSTEIN L.P. | 2.4% | 4,451,242 | -6.2% | 0.03% | $97,437,687 |
| Epoch Investment Partners, Inc. | 2.3% | 4,275,509 | -20% | 0.82% | $134,977,819 |
| BANK OF AMERICA CORP /DE/ | 2.1% | 3,877,361 | +20% | 0.01% | $122,408,283 |
| Boston Trust Walden Corp | 1.7% | 3,227,906 | -23% | 0.84% | $101,904,992 |
| GOLDMAN SACHS GROUP INC | 1.7% | 3,131,348 | +41% | 0.01% | $98,856,642 |
| VICTORY CAPITAL MANAGEMENT INC | 1.7% | 3,091,053 | -14% | 0.06% | $97,584,544 |
| GW&K Investment Management, LLC | 1.7% | 3,081,264 | -2.8% | 0.86% | $97,276,000 |
| MORGAN STANLEY | 1.6% | 3,027,975 | +8.3% | 0.01% | $95,593,190 |
| SYSTEMATIC FINANCIAL MANAGEMENT LP | 1.5% | 2,813,278 | -4.3% | 2% | $88,815,210 |
| Allspring Global Investments Holdings, LLC | 1.4% | 2,699,004 | -7.9% | 0.14% | $81,428,956 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | 1.4% | 2,666,648 | -20% | 0.61% | $84,186,142 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.4% | 2,613,478 | +4.8% | 0.01% | $82,507,500 |
| Nuveen, LLC | 1.2% | 2,253,068 | +24% | 0.02% | $71,129,356 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
32
Latest
Q1 2026
Rows shown
1-25 of 32
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 203,781,303 | $6,385,467,884 | +$188,350,022 | $31.57 | 402 |
| 2025 Q4 | 199,458,511 | $4,368,396,915 | -$227,369,483 | $21.89 | 377 |
| 2025 Q3 | 206,135,836 | $4,920,930,206 | -$224,803,628 | $23.87 | 370 |
| 2025 Q2 | 215,861,849 | $4,854,938,422 | -$54,932,193 | $22.48 | 383 |
| 2025 Q1 | 218,110,272 | $5,507,771,915 | -$46,450,645 | $25.26 | 405 |
| 2024 Q4 | 220,096,327 | $5,148,510,013 | -$75,415,520 | $23.38 | 381 |
| 2024 Q3 | 222,505,962 | $5,435,336,507 | +$37,225,141 | $24.42 | 365 |
| 2024 Q2 | 220,880,533 | $5,597,593,861 | -$28,819,580 | $25.34 | 344 |
| 2024 Q1 | 222,730,960 | $5,778,914,554 | +$698,644,961 | $25.95 | 322 |
| 2023 Q4 | 196,802,406 | $4,191,458,298 | +$90,269,529 | $21.29 | 294 |
| 2023 Q3 | 192,221,395 | $4,405,495,370 | -$137,915,292 | $22.91 | 287 |
| 2023 Q2 | 198,150,169 | $4,141,407,611 | -$32,609,394 | $20.90 | 278 |
| 2023 Q1 | 199,712,268 | $4,369,557,710 | +$118,575,344 | $21.88 | 272 |
| 2022 Q4 | 194,730,823 | $4,566,050,509 | +$54,079,784 | $23.45 | 291 |
| 2022 Q3 | 193,273,415 | $3,828,674,932 | -$398,040,849 | $19.81 | 273 |
| 2022 Q2 | 197,339,370 | $4,143,564,800 | +$199,308,095 | $20.99 | 273 |
| 2022 Q1 | 189,020,463 | $4,472,219,389 | +$35,077,659 | $23.65 | 243 |
| 2021 Q4 | 187,930,864 | $3,546,224,428 | +$32,547,837 | $18.87 | 227 |
| 2021 Q3 | 181,395,785 | $3,227,396,703 | +$18,816,498 | $17.79 | 235 |
| 2021 Q2 | 180,478,579 | $2,819,994,590 | +$30,552,184 | $15.63 | 203 |
| 2021 Q1 | 180,082,550 | $2,067,269,372 | +$77,051,237 | $11.48 | 187 |
| 2020 Q4 | 177,129,033 | $1,250,600,458 | +$12,882,730 | $7.06 | 169 |
| 2020 Q3 | 175,169,573 | $905,937,397 | +$4,387,772 | $5.17 | 170 |
| 2020 Q2 | 173,885,044 | $1,054,009,520 | -$1,632,850 | $6.06 | 170 |
| 2020 Q1 | 180,365,757 | $721,453,712 | -$24,684,280 | $4.00 | 153 |