Magnolia Oil & Gas Corp. Class AMGY
13F holders, Q1 2026 (March 31)406holders +27
67new positions
37sold out
8famous investors
$31.33avg. 13F price*
At the end of Q1 2026, 406 institutions reported holding Magnolia Oil & Gas Corp. Class A (MGY) in their 13F filings, up 27 from Q4 2025. 67 opened new positions and 37 sold out. The largest holders were BlackRock, Inc. ($931.0M), Vanguard Portfolio Management LLC ($409.9M) and American Century Companies Inc. ($331.8M). 8 famous investors held it, including Jim Simons / Peter Brown (0.1% of Renaissance Technologies's portfolio), Steve Cohen (0.0% of Point72 Asset Management's portfolio) and Paul Tudor Jones (0.0% of Tudor Investment Corporation'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 Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 67 | $65.5M |
| Exits | 37 | $203.7M |
All 13F filers, Q4 2025 → Q1 2026: 22,971,313 shares bought and 19,717,494 shares sold, net +3,253,819 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 406 holders
| BlackRock, Inc. | 0.02% | Add +6.6% | 29,491,149 | $931.0M |
| Vanguard Portfolio Management LLC | 0.02% | — | 12,983,395 | $409.9M |
| American Century Companies Inc. | 0.17% | Reduce -4.7% | 10,509,240 | $331.8M |
| State Street Corp. | 0.01% | Add +7.9% | 9,496,275 | $299.8M |
| Vanguard Capital Management LLC | 0.01% | — | 7,188,424 | $226.9M |
| Dimensional Fund Advisors LP | 0.05% | Add +6.0% | 7,028,781 | $221.9M |
| Janus Henderson Group PLC | 0.09% | Add +2.8% | 6,279,636 | $198.2M |
| Arrowstreet Capital, Limited Partnership | 0.11% | Add +790.8% | 6,263,808 | $197.7M |
| T. Rowe Price Investment Management, Inc. | 0.11% | Add +30.2% | 5,193,887 | $164.0M |
| Nomura Asset Management International Inc. | 0.27% | Add +0.3% | 4,972,261 | $157.0M |
| TD Asset Management Inc | 0.13% | Reduce -12.9% | 4,941,979 | $156.0M |
| Geode Capital Management, LLC | 0.01% | Add +2.3% | 4,538,112 | $143.3M |
| Epoch Investment Partners, Inc. | 0.82% | Reduce -19.8% | 4,275,509 | $135.0M |
| Bank of America Corp. | 0.01% | Add +20.5% | 3,877,361 | $122.4M |
| Boston Trust Walden Corp | 0.84% | Reduce -22.6% | 3,227,906 | $101.9M |
| Goldman Sachs Group Inc. | 0.01% | Add +40.7% | 3,131,348 | $98.9M |
| Victory Capital Management Inc. | 0.06% | Reduce -13.9% | 3,091,053 | $97.6M |
| Alliancebernstein L.P. | 0.03% | Reduce -6.2% | 4,451,242 | $97.4M |
| GW&K Investment Management, LLC | 0.86% | Reduce -2.8% | 3,081,264 | $97.3M |
| Morgan Stanley | 0.01% | Add +8.3% | 3,027,975 | $95.6M |
| Systematic Financial Management LP | 2.04% | Reduce -4.3% | 2,813,278 | $88.8M |
| Silvercrest Asset Management Group LLC | 0.61% | Reduce -20.0% | 2,666,648 | $84.2M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +4.8% | 2,613,478 | $82.5M |
| Allspring Global Investments Holdings, LLC | 0.14% | Reduce -7.9% | 2,699,004 | $81.4M |
| Nuveen, LLC | 0.02% | Add +23.8% | 2,253,068 | $71.1M |
| Loomis Sayles & Co. L P | 0.09% | Reduce -6.0% | 2,179,644 | $68.8M |
| Stephens Investment Management Group LLC | 0.94% | Add +0.8% | 2,172,120 | $68.6M |
| Northern Trust Corp. | 0.01% | Add +2.9% | 2,132,100 | $67.3M |
| Bank of New York Mellon Corp | 0.01% | Reduce -1.1% | 1,943,586 | $61.4M |
| Renaissance Technologies | 0.08% | Add +43.7% | 1,701,802 | $53.7M |
| Two Sigma Investments, LP | 0.05% | Add +297.6% | 1,693,795 | $53.5M |
| Westwood Holdings Group Inc. | 0.37% | Reduce -9.7% | 1,590,570 | $50.2M |
| Principal Financial Group Inc. | 0.03% | Reduce -2.4% | 1,544,274 | $48.8M |
| Manufacturers Life Insurance Company, The | 0.04% | Reduce -22.9% | 1,534,372 | $48.4M |
| Bessemer Group Inc. | 0.06% | Add +12.3% | 1,254,441 | $39.6M |
| JPMorgan Chase & Co. | 0.00% | Add +7.7% | 1,200,481 | $38.6M |
| Fred Alger Management, LLC | 0.17% | Add +594.1% | 1,195,380 | $37.7M |
| Vanguard Fiduciary Trust Co. | 0.01% | — | 1,181,924 | $37.3M |
| UBS Group AG | 0.01% | Add +33.8% | 1,170,209 | $36.9M |
| Voloridge Investment Management, LLC | 0.12% | Add +1.5% | 983,876 | $31.1M |
| First Trust Advisors LP | 0.02% | Add +11.6% | 976,356 | $30.8M |
| SIR Capital Management, L.P. | 2.51% | Reduce -15.8% | 851,094 | $26.9M |
| Public Sector Pension Investment Board | 0.08% | Add +5.7% | 801,757 | $25.3M |
| Aberdeen Group plc | 0.04% | Add +56.7% | 768,072 | $24.2M |
| Invesco Ltd. | 0.00% | Reduce -1.5% | 704,724 | $22.2M |
| Point72 Asset Management | 0.04% | Add +129.2% | 692,589 | $21.9M |
| Heartland Advisors Inc. | 1.02% | Reduce -3.2% | 630,475 | $19.9M |
| Millennium Management | 0.01% | Add +61.2% | 599,017 | $18.9M |
| Rhumbline Advisers | 0.02% | Add +1.0% | 577,269 | $18.2M |
| Algert Global LLC | 0.25% | New | 523,620 | $16.5M |
| AQR Capital Management | 0.01% | Add +56.3% | 497,885 | $15.7M |
| Gilder Gagnon Howe & Co. LLC | 0.18% | Reduce -25.6% | 486,526 | $15.4M |
| Sei Investments Co. | 0.01% | Add +93.2% | 455,352 | $14.4M |
| Squarepoint Ops LLC | 0.03% | Add +264.3% | 454,853 | $14.4M |
| Oberweis Asset Management Inc./ | 0.42% | Add +20.8% | 454,466 | $14.3M |
| Creative Planning | 0.01% | Add +121.3% | 430,579 | $13.6M |
| Envestnet Asset Management Inc. | 0.00% | Add +10.9% | 422,086 | $13.3M |
| Neuberger Berman Group LLC | 0.01% | Add +1894.5% | 418,247 | $13.2M |
| California Public Employees Retirement System | 0.01% | Add +8.6% | 413,997 | $13.1M |
| Corigliano Investment Advisers, LLC | 4.91% | Reduce -35.5% | 398,000 | $12.6M |
| State of Wisconsin Investment Board | 0.03% | Reduce -11.6% | 386,531 | $12.2M |
| Legal & General Group Plc | 0.00% | Reduce -11.6% | 385,963 | $12.2M |
| Foster Victor Wealth Advisors, LLC | 0.69% | Add +1.7% | 424,272 | $12.1M |
| Barrow Hanley Mewhinney & Strauss LLC | 0.04% | Add +15.4% | 381,899 | $12.1M |
| Nordea Investment Management AB | 0.01% | Reduce -4.0% | 362,828 | $11.7M |
| Citadel Advisors | 0.01% | Add +4.1% | 364,172 | $11.5M |
| Edgestream Partners, L.P. | 0.37% | Add +45.7% | 352,998 | $11.1M |
| Swiss National Bank | 0.01% | Add +0.4% | 348,300 | $11.0M |
| Diamond Hill Capital Management, LLC (Investment Advisor) | 0.06% | Reduce -21.6% | 325,021 | $10.3M |
| Ameriprise Financial Inc. | 0.00% | Reduce -6.5% | 301,877 | $9.5M |
| Raymond James Financial Inc. | 0.00% | Add +7.0% | 283,586 | $9.0M |
| Jane Street Group, LLC | 0.01% | Reduce -23.2% | 277,770 | $8.8M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.02% | Reduce -5.6% | 275,307 | $8.7M |
| HRT Financial LP | 0.02% | Reduce -13.3% | 273,438 | $8.6M |
| Trexquant Investment LP | 0.06% | Reduce -34.1% | 258,646 | $8.2M |
| BNP Paribas Financial Markets | 0.01% | Add +1099.7% | 251,446 | $7.9M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.02% | Reduce -46.8% | 249,319 | $7.9M |
| T. Rowe Price Associates Inc. | 0.00% | Add +18.9% | 244,319 | $7.7M |
| Rafferty Asset Management, LLC | 0.03% | Add +21.9% | 239,979 | $7.6M |
| Campbell & CO Investment Adviser LLC | 0.43% | Add +351.4% | 237,440 | $7.5M |
| Prudential Financial Inc. | 0.01% | Add +36.6% | 234,640 | $7.4M |
| King Luther Capital Management Corp. | 0.03% | Reduce -7.0% | 232,258 | $7.3M |
| Franklin Resources Inc. | 0.00% | Add +19.0% | 225,326 | $7.1M |
| Deutsche Bank AG | 0.00% | Reduce -14.3% | 220,201 | $7.0M |
| Russell Investments Group, Ltd. | 0.01% | Add +144.5% | 219,103 | $6.9M |
| Clark Capital Management Group, Inc. | 0.04% | New | 213,939 | $6.8M |
| California State Teachers Retirement System | 0.01% | Add +26.3% | 211,468 | $6.7M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +2.9% | 206,813 | $6.5M |
| Man Group plc | 0.01% | Reduce -48.8% | 204,321 | $6.5M |
| Emerald Investment Advisers, LLC | 0.58% | — | 203,524 | $6.4M |
| Phocas Financial Corp. | 0.99% | Reduce -25.1% | 199,397 | $6.3M |
| Moody Aldrich Partners LLC | 1.10% | Add +1.7% | 192,627 | $6.1M |
| Susquehanna International Group, LLP | 0.01% | Add +542.3% | 192,140 | $6.1M |
| Great Lakes Advisors, LLC | 0.05% | Add +19.2% | 186,566 | $5.9M |
| Barclays PLC | 0.00% | Reduce -48.5% | 186,396 | $5.9M |
| Wells Fargo & Company | 0.00% | Reduce -45.1% | 167,815 | $5.3M |
| Y-Intercept (Hong Kong) Ltd | 0.09% | Add +481.9% | 153,445 | $4.8M |
| CANADA LIFE ASSURANCE Co | 0.01% | Reduce -4.2% | 150,009 | $4.7M |
| Seven Grand Managers, LLC | 0.32% | New | 150,000 | $4.7M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | — | 143,874 | $4.5M |
"% 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.