Magnolia Oil & Gas Corp
Ownership
Ownership Structure
Who owns Magnolia Oil & Gas Corp (MGY)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 75.4% of the shares are freely tradable; institutional investors hold 113.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 11.88 | 31,972,219 | +8.4 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 5.70 | 15,341,201 | +18.2 | 06/30/2026 |
| American Century Companies Inc | 4.09 | 11,011,458 | +4.8 | 06/30/2026 |
| State Street Corp | 3.69 | 9,941,466 | +4.7 | 06/30/2026 |
| Vanguard Capital Management, LLC | 2.85 | 7,663,263 | +6.6 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 2.64 | 7,117,449 | +1.3 | 06/30/2026 |
| Jupiter Topco LLC | 2.39 | 6,427,893 | +0.0 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.24 | 14,117,772 | +0.0 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.81 | 7,555,534 | +2.7 | 09/30/2026 |
| Avantis US Small Cap Value ETF | 2.74 | 7,384,856 | +0.2 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Stavros Christopher G | CEO & CHAIRMAN | 898,781 | 23,817,697 $ | Sep 24, 2026 | direct |
| Yang Timothy D. | EVP, CHIEF LEGAL & COMM & SEC | 534,783 | 14,171,750 $ | Sep 24, 2026 | direct |
| Corales Brian | SVP & CHIEF FINANCIAL OFFICER | 191,573 | 5,076,685 $ | Sep 24, 2026 | direct |
| Acosta Arcilia | Director | 134,721 | 3,570,107 $ | Sep 1, 2026 | direct |
| Khani David M. | Director | 30,676 | 812,914 $ | Sep 1, 2026 | direct |
| Ropp Ralph Lewis | Director | 26,007 | 689,186 $ | Aug 7, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 24, 2026 | Corales Brian | SVP & CHIEF FINANCIAL OFFICER | Other | 4,798 | 24.74 | 118,703 |
| Sep 24, 2026 | Corales Brian | SVP & CHIEF FINANCIAL OFFICER | Other | 12,193 | 0.00 | – |
| Sep 24, 2026 | Yang Timothy D. | EVP, CHIEF LEGAL & COMM & SEC | Other | 5,270 | 24.74 | 130,380 |
| Sep 24, 2026 | Yang Timothy D. | EVP, CHIEF LEGAL & COMM & SEC | Other | 13,392 | 0.00 | – |
| Sep 24, 2026 | Stavros Christopher G | CEO & CHAIRMAN | Other | 9,855 | 24.74 | 243,813 |
| Sep 24, 2026 | Stavros Christopher G | CEO & CHAIRMAN | Other | 25,044 | 0.00 | – |
| Sep 1, 2026 | Acosta Arcilia | Director | Other | 80 | 0.00 | – |
| Sep 1, 2026 | Khani David M. | Director | Buy | 54 | 26.78 | 1,446 |
| Aug 7, 2026 | Ropp Ralph Lewis | Director | Buy | 5,000 | 24.63 | 123,125 |
| Aug 7, 2026 | Khani David M. | Director | Buy | 8,000 | 25.00 | 200,000 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.