Magnolia Oil & Gas Corp. Class AMGY
13F holders, Q3 2025 (September 30)373holders −11
34new positions
43sold out
6famous investors
$23.87avg. 13F price*
At the end of Q3 2025, 373 institutions reported holding Magnolia Oil & Gas Corp. Class A (MGY) in their 13F filings, down 11 from Q2 2025. 34 opened new positions and 43 sold out. The largest holders were BlackRock, Inc. ($655.1M), Vanguard Group Inc. ($474.4M) and American Century Companies Inc. ($283.8M). 6 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Joel Greenblatt (0.0% of Gotham Asset Management's portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Magnolia Oil & Gas Corp. Class A
- CUSIP
- 559663109
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 34 | $20.2M |
| Exits | 43 | $80.6M |
All 13F filers, Q2 2025 → Q3 2025: 10,181,174 shares bought and 19,638,776 shares sold, net −9,457,602 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 373 holders
| BlackRock, Inc. | 0.01% | Reduce -0.5% | 27,443,348 | $655.1M |
| Vanguard Group Inc. | 0.01% | Reduce -1.9% | 19,875,856 | $474.4M |
| American Century Companies Inc. | 0.14% | Add +0.2% | 11,887,655 | $283.8M |
| State Street Corp. | 0.01% | Reduce -11.5% | 8,675,100 | $207.1M |
| Dimensional Fund Advisors LP | 0.03% | Add +4.7% | 6,369,713 | $152.1M |
| Janus Henderson Group PLC | 0.07% | Reduce -1.5% | 6,355,219 | $151.7M |
| T. Rowe Price Investment Management, Inc. | 0.08% | Reduce -0.3% | 5,576,462 | $133.1M |
| Macquarie Group Ltd. | 0.15% | Reduce -8.4% | 5,381,675 | $128.5M |
| Wellington Management Group LLP | 0.02% | Add +2.2% | 5,225,168 | $124.7M |
| Alliancebernstein L.P. | 0.04% | Reduce -2.4% | 4,658,667 | $111.2M |
| Geode Capital Management, LLC | 0.01% | Reduce -0.2% | 4,520,985 | $107.9M |
| TD Asset Management Inc | 0.09% | Add +55.7% | 4,478,361 | $106.9M |
| Epoch Investment Partners, Inc. | 0.54% | Add +58.7% | 4,138,626 | $98.8M |
| Victory Capital Management Inc. | 0.06% | Reduce -8.8% | 3,958,502 | $94.5M |
| Boston Trust Walden Corp | 0.69% | Reduce -1.5% | 3,942,736 | $94.1M |
| Silvercrest Asset Management Group LLC | 0.57% | Reduce -2.0% | 3,590,433 | $85.7M |
| Bank of America Corp. | 0.01% | Reduce -23.7% | 3,240,001 | $77.3M |
| Goldman Sachs Group Inc. | 0.01% | Reduce -19.2% | 3,139,382 | $74.9M |
| Allspring Global Investments Holdings, LLC | 0.12% | Reduce -6.9% | 3,078,366 | $73.8M |
| Systematic Financial Management LP | 1.73% | Reduce -1.4% | 2,972,351 | $71.0M |
| Morgan Stanley | 0.00% | Reduce -13.3% | 2,778,633 | $66.3M |
| GW&K Investment Management, LLC | 0.58% | Reduce -9.4% | 2,765,094 | $66.0M |
| Loomis Sayles & Co. L P | 0.07% | Reduce -2.9% | 2,505,136 | $59.8M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +4.8% | 2,433,827 | $58.1M |
| Northern Trust Corp. | 0.01% | Add +21.5% | 2,229,193 | $53.2M |
| Encompass Capital Advisors LLC | 2.34% | Add +64.1% | 2,182,088 | $52.1M |
| Stephens Investment Management Group LLC | 0.67% | Reduce -6.0% | 2,157,166 | $51.5M |
| Principal Financial Group Inc. | 0.03% | Reduce -4.4% | 2,142,155 | $51.1M |
| EnerVest, Ltd. | 100.00% | No change | 2,099,403 | $50.1M |
| Manufacturers Life Insurance Company, The | 0.04% | Reduce -12.8% | 2,057,354 | $49.1M |
| Nuveen, LLC | 0.01% | Add +5.3% | 1,926,705 | $46.0M |
| Balyasny Asset Management L.P. | 0.09% | Reduce -20.3% | 1,777,149 | $42.4M |
| Bank of New York Mellon Corp | 0.01% | Add +2.0% | 1,773,130 | $42.3M |
| UBS Group AG | 0.01% | Add +16.1% | 1,743,421 | $41.6M |
| SIR Capital Management, L.P. | 3.73% | Add +25.1% | 1,740,161 | $41.5M |
| First Trust Advisors LP | 0.03% | Reduce -26.6% | 1,540,551 | $36.8M |
| Arrowstreet Capital, Limited Partnership | 0.02% | Add +192.3% | 1,401,279 | $33.4M |
| Renaissance Technologies | 0.04% | Add +1.8% | 1,116,311 | $26.6M |
| Bessemer Group Inc. | 0.03% | Add +4.4% | 912,526 | $21.8M |
| JPMorgan Chase & Co. | 0.00% | Add +34.8% | 858,972 | $20.5M |
| Public Sector Pension Investment Board | 0.07% | Add +10.9% | 804,492 | $19.2M |
| Brandywine Global Investment Management, LLC | 0.13% | Reduce -5.9% | 758,213 | $18.1M |
| Invesco Ltd. | 0.00% | Reduce -22.4% | 758,009 | $18.1M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.05% | Reduce -9.5% | 714,225 | $17.0M |
| Two Sigma Investments, LP | 0.03% | Add +23.1% | 704,870 | $16.8M |
| Gilder Gagnon Howe & Co. LLC | 0.17% | Reduce -7.0% | 691,325 | $16.5M |
| Woodline Partners LP | 0.07% | Reduce -72.2% | 643,184 | $15.4M |
| Pacer Advisors, Inc. | 0.04% | Add +16251.3% | 626,745 | $15.0M |
| Jane Street Group, LLC | 0.02% | Reduce -17.4% | 589,025 | $14.1M |
| Rhumbline Advisers | 0.01% | Reduce -1.0% | 578,365 | $13.8M |
| Heartland Advisors Inc. | 0.73% | Add +92.1% | 576,290 | $13.8M |
| Barclays PLC | 0.01% | Reduce -54.7% | 555,950 | $13.3M |
| Two Sigma Advisers, LP | 0.03% | Reduce -34.2% | 554,500 | $13.2M |
| Aberdeen Group plc | 0.02% | Reduce -5.7% | 515,209 | $12.5M |
| Barrow Hanley Mewhinney & Strauss LLC | 0.04% | Reduce -1.7% | 518,354 | $12.4M |
| Man Group plc | 0.02% | Add +42.3% | 473,332 | $11.3M |
| Legal & General Group Plc | 0.00% | Reduce -4.2% | 463,187 | $11.1M |
| Osterweis Capital Management Inc. | 0.63% | Reduce -21.8% | 449,967 | $10.7M |
| Nordea Investment Management AB | 0.01% | Add +0.5% | 446,662 | $10.7M |
| Voloridge Investment Management, LLC | 0.04% | Add +14.1% | 448,028 | $10.7M |
| Corigliano Investment Advisers, LLC | 3.44% | Add +26.1% | 445,000 | $10.6M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -0.6% | 414,556 | $9.9M |
| Aventail Capital Group, LP | 0.45% | Add +0.0% | 400,928 | $9.6M |
| State of Wisconsin Investment Board | 0.02% | Add +1.0% | 394,339 | $9.4M |
| Foster Victor Wealth Advisors, LLC | 0.56% | Add +5.2% | 381,969 | $9.0M |
| Oberweis Asset Management Inc./ | 0.34% | No change | 376,300 | $9.0M |
| California Public Employees Retirement System | 0.01% | Add +14.1% | 366,012 | $8.7M |
| Ameriprise Financial Inc. | 0.00% | Reduce -4.2% | 365,171 | $8.7M |
| Raymond James Financial Inc. | 0.00% | Add +0.6% | 349,285 | $8.3M |
| Swiss National Bank | 0.00% | Add +0.6% | 344,400 | $8.2M |
| Wells Fargo & Company | 0.00% | Add +4.5% | 313,892 | $7.5M |
| AQR Capital Management | 0.00% | Add +30.2% | 278,488 | $6.6M |
| Phocas Financial Corp. | 0.83% | Add +40.9% | 266,754 | $6.4M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.01% | Add +1.6% | 258,554 | $6.2M |
| King Luther Capital Management Corp. | 0.03% | Reduce -0.2% | 252,915 | $6.0M |
| Dark Forest Capital Management LP | 0.22% | Reduce -51.7% | 239,863 | $5.7M |
| Illinois Municipal Retirement Fund | 0.07% | Add +40.1% | 236,168 | $5.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -67.3% | 226,283 | $5.4M |
| Prudential Financial Inc. | 0.01% | Add +11.0% | 216,062 | $5.2M |
| F/m Investments LLC | 0.19% | Reduce -1.8% | 211,104 | $5.0M |
| Moody Aldrich Partners LLC | 0.93% | Reduce -16.9% | 204,279 | $4.9M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -54.6% | 200,939 | $4.8M |
| Deutsche Bank AG | 0.00% | Add +9.8% | 200,382 | $4.8M |
| Citigroup Inc. | 0.00% | Reduce -43.8% | 196,804 | $4.7M |
| HITE Hedge Asset Management LLC | 0.25% | New | 190,981 | $4.6M |
| Sei Investments Co. | 0.00% | Add +6.6% | 190,750 | $4.6M |
| Royal Bank of Canada | 0.00% | Reduce -38.9% | 187,335 | $4.5M |
| Creative Planning | 0.00% | Add +144.9% | 186,742 | $4.5M |
| Rafferty Asset Management, LLC | 0.01% | Reduce -20.0% | 179,677 | $4.3M |
| Bridgeway Capital Management, LLC | 0.09% | Add +37.7% | 174,650 | $4.2M |
| Fred Alger Management, LLC | 0.02% | No change | 172,261 | $4.1M |
| California State Teachers Retirement System | 0.00% | Add +2.9% | 170,350 | $4.1M |
| Nicholas Investment Partners, LP | 0.35% | Add +6.2% | 165,899 | $4.0M |
| Verition Fund Management LLC | 0.02% | Add +19.9% | 163,485 | $3.9M |
| Lazard Asset Management LLC | 0.01% | Reduce -2.2% | 163,392 | $3.9M |
| Gotham Asset Management | 0.02% | Add +33.0% | 161,273 | $3.8M |
| CANADA LIFE ASSURANCE Co | 0.01% | Reduce -0.1% | 156,211 | $3.8M |
| STRS Ohio | 0.01% | Add +5.4% | 152,100 | $3.6M |
| Franklin Resources Inc. | 0.00% | Add +38.8% | 151,332 | $3.6M |
| State Board of Administration of Florida Retirement System | 0.01% | Add +44.4% | 149,150 | $3.6M |
"% of holder's portfolio" is MGY's weight in each manager's 13F, not the share of Magnolia Oil & Gas Corp. Class A the manager owns.