Who owns MGYWhat MGY owns — n/a

Who owns Magnolia Oil & Gas Corp?

Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.

Institutional ownership of MGY from SEC Form 13F filings across 411 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.

As of the 2026-06-30 reporting period, 411 institutions disclosed 205.5M shares of Magnolia Oil & Gas Corp worth $5.28B — about 111.4% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.

411

13F holders

$5.28B

value, 2026 filers

111.4%

of shares outstanding (205.5M 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%	17.3%	+8.4%
2	VANGUARD PORTFOLIO MANAGEMENT LLC	15.3M	$392.4M	0.0%	8.3%	+18.2%
3	AMERICAN CENTURY COMPANIES INC	11.0M	$281.7M	0.1%	6%	+4.8%
4	STATE STREET CORP	9.9M	$254.3M	0.0%	5.4%	+4.7%
5	VANGUARD CAPITAL MANAGEMENT LLC	7.7M	$196.0M	0.0%	4.2%	+6.6%
6	DIMENSIONAL FUND ADVISORS LP	7.1M	$182.1M	0.0%	3.9%	+1.3%
7	Jupiter Topco LLCNEW	6.4M	$164.4M	0.1%	3.5%	new
8	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	5.5M	$139.8M	0.1%	3%	-12.8%
9	T. Rowe Price Investment Management, Inc.	5.2M	$132.5M	0.1%	2.8%	-0.3%
10	GEODE CAPITAL MANAGEMENT, LLC	4.8M	$122.9M	0.0%	2.6%	+5.8%
11	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	4.3M	$110.3M	0.2%	2.3%	-13.3%
12	BANK OF AMERICA CORP /DE/	4.3M	$108.8M	0.0%	2.3%	+9.7%
13	ALLIANCEBERNSTEIN L.P.	4.1M	$130.1M	0.0%	2.2%	-7.4%
14	TD Asset Management Inc	3.9M	$100.6M	0.1%	2.1%	-20.4%
15	Epoch Investment Partners, Inc.	3.6M	$91.3M	0.5%	1.9%	-16.5%
16	MORGAN STANLEY	3.4M	$87.7M	0.0%	1.9%	+13.3%
17	VICTORY CAPITAL MANAGEMENT INC	3.0M	$76.3M	0.0%	1.6%	-3.5%
18	GW&K Investment Management, LLC	2.9M	$74.6M	0.6%	1.6%	-5.3%
19	SYSTEMATIC FINANCIAL MANAGEMENT LP	2.8M	$71.0M	1.4%	1.5%	-1.3%
20	Allspring Global Investments Holdings, LLC	2.7M	$66.6M	0.1%	1.4%	-1.2%
21	WESTWOOD HOLDINGS GROUP INC	2.6M	$67.6M	0.5%	1.4%	+66.1%
22	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	2.6M	$67.0M	0.0%	1.4%	+0.2%
23	SILVERCREST ASSET MANAGEMENT GROUP LLC	2.5M	$64.9M	0.4%	1.4%	-4.8%
24	GOLDMAN SACHS GROUP INC	2.4M	$61.5M	0.0%	1.3%	-23.2%
25	Boston Trust Walden Corp	2.4M	$61.0M	0.5%	1.3%	-26.1%

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.