Magnolia Oil & Gas Corporation

MGY • NYSE

Magnolia Oil & Gas Corporation is a oil & gas exploration & production company in the energy sector on NYSE, led by Christopher Stavros, with a market cap of $4.2B. As of Q3 2025, 111% of shares are held by 369 institutional investors, with BlackRock, Inc. as the largest holder at 14.81%.

President and Chief Executive OfficerChristopher Stavros

Market Cap$4.2B

Oil & Gas Exploration & Production

Energy

Employees247.0

Websitemagnoliaoilgas.com

Country

United States of America

Overview

Overview of institutional ownership in MGY as of Q3 2025 with a market cap of $4.4B

All Institutions

Institutions: 369
Value Held: $4.9B
Shares Held: 206.1M
Avg Position: $13.3M
Median Position: $809.6K

Hedge Funds

Hedge Funds: 43
Value Held: $317.3M
Shares Held: 13.3M
Avg Position: $7.4M
Median Position: $1.2M

Ownership Breakdown

Institutional (non-HF)

104.07%

$4.6B

Hedge Funds

7.17%

$317.3M

Retail & Other

Based on market cap of $4.4B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in MGY as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
B BlackRock, Inc. Institution	-	$655.1M 0.01% of portfolio	14.81% 27.4M shares	Q3 2018 Held for 7y 2m	$5.67T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$474.4M 0.01% of portfolio	10.73% 19.9M shares	Q3 2018 Held for 7y 2m	$6.69T
A AMERICAN CENTURY COMPANIES INC Institution	-	$283.8M 0.14% of portfolio	6.42% 11.9M shares	Q3 2019 Held for 6y 2m	$195.93B
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$207.1M 0.01% of portfolio	4.68% 8.7M shares	Q3 2018 Held for 7y 2m	$2.88T
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$152.1M 0.03% of portfolio	3.44% 6.4M shares	Q1 2021 Held for 4y 8m	$466.32B
HENDERSON GROUP PLC Institution	Ali Dibadj CEO	$151.7M 0.07% of portfolio	3.43% 6.4M shares	Q3 2021 Held for 4y 2m	$218.74B
T T. Rowe Price Investment Management, Inc. Insurance Manager	John Edward Robison President	$133.1M 0.08% of portfolio	3.01% 5.6M shares	Q3 2022 Held for 3y 2m	$161.58B
M MACQUARIE GROUP LTD Institution	-	$128.5M 0.15% of portfolio	2.90% 5.4M shares	Q2 2020 Held for 5y 5m	$82.9B
WELLINGTON MANAGEMENT CO LLP Long Only Manager	Jean Marie Hynes CEO	$124.7M 0.02% of portfolio	2.82% 5.2M shares	Q1 2018 Held for 7y 8m	$571.21B
ALLIANCEBERNSTEIN L.P. Long Only Manager	Seth Perry Bernstein CEO	$111.2M 0.04% of portfolio	2.51% 4.7M shares	Q3 2018 Held for 7y 2m	$317.45B

Net Capital Flow

Institutional buying and selling activity for MGY in Q3 2025

Traded: −$171.6M
Buyers: 172
Sellers: 188
Total Bought: +$245.6M
Total Sold: −$417.3M
Avg Position: $11.9M

Biggest Buyers

Institution	Net Bought	Current Position
T TD ASSET MANAGEMENT INC Institution	+$38.2M +1.6M shares	$106.9M 4.5M shares
Epoch Investment Partners, Inc. Long Only Manager	+$36.5M +1.5M shares	$98.8M 4.1M shares
ARROWSTREET CAPITAL LIMITED PARTNERSHIP Hedge Fund•Quant	+$22.0M +922.0K shares	$33.4M 1.4M shares
Encompass Capital Advisors LLC Hedge Fund•Long/Short	+$20.3M +852.5K shares	$52.1M 2.2M shares
P Pacer Advisors, Inc. Institution	+$14.9M +622.9K shares	$15.0M 626.7K shares
NORTHERN TRUST CORP Institution	+$9.4M +394.6K shares	$53.2M 2.2M shares
S SIR Capital Management, L.P. Hedge Fund•Long/Short	+$8.3M +349.5K shares	$41.5M 1.7M shares
DIMENSIONAL FUND ADVISORS LP Long Only Manager	+$6.8M +283.4K shares	$152.1M 6.4M shares
H HEARTLAND ADVISORS INC Long Only Manager	+$6.6M +276.3K shares	$13.8M 576.3K shares
UBS Group AG Institution	+$5.8M +242.1K shares	$41.6M 1.7M shares

Biggest Sellers

Institution	Net Sold	Current Position
Woodline Partners LP Hedge Fund•Long/Short	−$39.8M −1.7M shares	$15.4M 643.2K shares
STATE STREET CORP Institution	−$26.8M −1.1M shares	$207.1M 8.7M shares
BANK OF AMERICA CORP /DE/ Institution	−$24.1M −1.0M shares	$77.3M 3.2M shares
GOLDMAN SACHS GROUP INC Institution	−$17.8M −744.7K shares	$74.9M 3.1M shares
HALLMARK CAPITAL MANAGEMENT INC RIA/Wealth	−$16.1M −715.2K shares	Sold Off 0 shares
BARCLAYS PLC Institution	−$16.0M −670.3K shares	$13.3M 556.0K shares
TimesSquare Capital Management, LLC Long Only Manager	−$15.6M −692.0K shares	Sold Off 0 shares
FIRST TRUST ADVISORS LP ETF Provider	−$13.3M −558.8K shares	$36.8M 1.5M shares
Ranger Investment Management, L.P. Long Only Manager	−$12.6M −561.0K shares	Sold Off 0 shares
M MACQUARIE GROUP LTD Institution	−$11.8M −495.4K shares	$128.5M 5.4M shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited MGY in Q3 2025

New Positions: 14
New Value: $4.7M
Exited Positions: 44
Exited Value: $93.0M

New Positions

Institution	Position Value
Kingsview Wealth Management, LLC RIA/Wealth	$3.2M 135.7K shares
I INCEPTIONR LLC Hedge Fund•Quant	$684.0K 28.7K shares
Sequoia Financial Advisors, LLC RIA/Wealth	$477.4K 20.0K shares
A AXQ CAPITAL, LP Hedge Fund•Market Neutral	$205.2K 8.6K shares
FIRST HORIZON NATIONAL CORP RIA/Wealth	$17.4K 727.0 shares
S Salomon & Ludwin, LLC Institution	$15.1K 584.0 shares
R Root Financial Partners, LLC RIA/Wealth	$11.4K 479.0 shares
Wall Street Access Asset Management, LLC RIA/Wealth	$8.9K 373.0 shares
Sontag Advisory, LLC RIA/Wealth	$7.8K 328.0 shares
Halbert, Hargrove/Russell LLC RIA/Wealth	$6.2K 261.0 shares

Exited Positions

Institution	Previous Position
HALLMARK CAPITAL MANAGEMENT INC RIA/Wealth	$16.1M 715.2K shares
TimesSquare Capital Management, LLC Long Only Manager	$15.6M 692.0K shares
Ranger Investment Management, L.P. Long Only Manager	$12.6M 561.0K shares
Kingstone Capital Partners Texas, LLC RIA/Wealth	$9.8M 434.3K shares
S Squarepoint Ops LLC Hedge Fund•Quant	$7.8M 349.2K shares
WASATCH ADVISORS INC Long Only Manager	$5.4M 238.3K shares
C Capitolis Liquid Global Markets LLC Private Equity	$4.9M 216.1K shares
ALGERT COLDIRON INVESTORS LLC Hedge Fund•Quant	$3.9M 173.3K shares
T TEXAS PERMANENT SCHOOL FUND Institution	$2.7M 120.3K shares
D Dynamic Technology Lab Private Ltd Institution	$1.8M 78.4K shares

Options Activity

Institutions with the largest Call and Put options positions in MGY as of Q3 2025

Call Positions: 7
Call Value: $25.4M
Put Positions: 2
Put Value: $799.6K

Call Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$11.0M 4.6K contracts
Caption Management, LLC Hedge Fund•Long/Short	$10.6M 4.5K contracts
P PEAK6 LLC Institution	$2.1M 899.0 contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$1.1M 481.0 contracts
W WOLVERINE TRADING, LLC Institution	$285.3K 118.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$159.9K 67.0 contracts
WOLVERINE ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$2.4K 1.0 contracts

Put Positions

Institution	Position Value
WOLVERINE ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$799.6K 335.0 contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	- - contracts

Most Committed Institutions

Institutions with MGY as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
E EnerVest, Ltd. Institution	-	100.00% $50.1M	1.13% 2.1M shares	Q4 2018 Held for 6y 11m	$50.1M
S SIR Capital Management, L.P. Hedge Fund•Long/Short	Mirco Ronald Elias CFO	3.73% $41.5M	0.94% 1.7M shares	Q2 2024 Held for 1y 5m	$1.1B
Corigliano Investment Advisers, LLC Hedge Fund•Sector	Mark E Corigliano CEO	3.44% $10.6M	0.24% 445.0K shares	Q2 2025 Held for 5 months	$308.5M
Encompass Capital Advisors LLC Hedge Fund•Long/Short	Todd Jason Kantor Managing Partner	2.33% $52.1M	1.18% 2.2M shares	Q1 2025 Held for 8 months	$2.2B
SYSTEMATIC FINANCIAL MANAGEMENT LP Long Only Manager	Kenneth Burgess CIO	1.73% $71.0M	1.60% 3.0M shares	Q3 2018 Held for 7y 2m	$4.1B
A ALBERT D MASON INC Institution	-	1.13% $1.5M	0.03% 61.7K shares	Q1 2019 Held for 6y 8m	$130.1M
MOODY ALDRICH PARTNERS LLC Long Only Manager	Daniel Brook Wanzenberg CIO	0.92% $4.9M	0.11% 204.3K shares	Q2 2024 Held for 1y 5m	$527.2M
Phocas Financial Corp. Long Only Manager	William Franz Kim Schaff CEO	0.83% $6.4M	0.14% 266.8K shares	Q1 2021 Held for 4y 8m	$771.4M
Bosman Wealth Management, LLC RIA/Wealth	Michael Lee Bosman Managing Partner	0.80% $1.0M	0.02% 43.0K shares	Q4 2024 Held for 11 months	$129.0M
M Mitsubishi UFJ Asset Management Ltd. Institution	-	0.78% $1.6M	0.04% 68.0K shares	Q4 2024 Held for 11 months	$206.8M