Who owns MGYWhat MGY owns — n/a

Who owns Magnolia Oil & Gas Corporation?

Institutional ownership of MGY from SEC Form 13F filings across 268 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.

268

13F holders

$3.96B

value, 2026 filers

66.7%

of shares outstanding (158.2M sh)

new positions (2026 filers)

Top institutional holders

ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of MGY's shares outstanding

#	Manager	Shares	Value	% of fund	% of co.	Δ shares QoQ
1	BlackRock, Inc.	32.0M	$817.8M	0.0%	13.5%	+8.4%
2	VANGUARD PORTFOLIO MANAGEMENT LLC	15.3M	$392.4M	0.0%	6.5%	+18.2%
3	AMERICAN CENTURY COMPANIES INC	11.0M	$281.7M	0.1%	4.6%	+4.8%
4	VANGUARD CAPITAL MANAGEMENT LLC	7.7M	$196.0M	0.0%	3.2%	-46.7%
5	Jupiter Topco LLCNEW	6.4M	$164.4M	0.1%	2.7%	new
6	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	5.5M	$139.8M	0.1%	2.3%	-12.8%
7	GEODE CAPITAL MANAGEMENT, LLC	4.8M	$122.9M	0.0%	2%	+5.8%
8	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	4.3M	$110.3M	0.2%	1.8%	-13.3%
9	BANK OF AMERICA CORP /DE/	4.3M	$108.8M	0.0%	1.8%	+9.7%
10	ALLIANCEBERNSTEIN L.P.	4.1M	$130.1M	0.0%	1.7%	-7.4%
11	TD Asset Management Inc	3.9M	$100.6M	0.1%	1.7%	-20.4%
12	MORGAN STANLEY	3.4M	$87.7M	0.0%	1.4%	+13.3%
13	VICTORY CAPITAL MANAGEMENT INC	3.0M	$76.3M	0.0%	1.3%	-3.5%
14	Allspring Global Investments Holdings, LLC	2.7M	$66.6M	0.1%	1.1%	-1.2%
15	WESTWOOD HOLDINGS GROUP INC	2.6M	$67.6M	0.5%	1.1%	+66.1%
16	Sixth Street Partners Management Company, L.P.NEW	2.6M	$67.0M	11.6%	1.1%	new
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	2.6M	$67.0M	0.0%	1.1%	+0.2%
18	SILVERCREST ASSET MANAGEMENT GROUP LLC	2.5M	$64.9M	0.4%	1.1%	-4.8%
19	GOLDMAN SACHS GROUP INC	2.4M	$61.5M	0.0%	1%	-23.2%
20	Nuveen, LLC	2.2M	$57.0M	0.0%	0.9%	-1.1%
21	Bank of New York Mellon Corp	1.9M	$49.7M	0.0%	0.8%	0.0%
22	NORTHERN TRUST CORP	1.9M	$48.5M	0.0%	0.8%	-11.1%
23	MANUFACTURERS LIFE INSURANCE COMPANY, THE	1.9M	$47.5M	0.0%	0.8%	+21.0%
24	PRICE T ROWE ASSOCIATES INC /MD/	1.7M	$43,822	0.0%	0.7%	+601.2%
25	Public Sector Pension Investment Board	1.6M	$40.6M	0.1%	0.7%	+97.9%

Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.