Magnolia Oil & Gas MGY Institutional Ownership

NYSE MGY

$25.43 -0.03 (-0.12%)

As of: Oct 21, 2026 · 3:59 PM EDT

Institutions by Trading Activity

409 Institutions

Increased 222 54.3%

Unchanged 48 11.7%

Reduced 139 34.0%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

—

13F totals exceed reported shares outstanding

Shares Held by Institutions

205.52Mn

of 183.70Mn outstanding

▲+0.91% QoQ

Shares Outstanding

183.70Mn

Institutional Investors

409

filed 13F for Jun 2026

▲+7 vs prior quarter

Net Shares Added (QoQ)

+1.86Mn

accumulated since last quarter

Value of Holdings

$5.23Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Magnolia Oil & Gas Corp (NYSE:MGY) had 409 institutional holders reporting a position on Form 13F for the quarter ended June 30, 2026.

Total shares held in Magnolia Oil & Gas rose 0.91% from Q1 2026, while the number of holders rose 6.51% from Q2 2025.
Of the 409 holders, 222 added to their positions, 139 reduced their stakes and 48 left their positions unchanged in Q2 2026.
Institutional investors held 205.52Mn shares of Magnolia Oil & Gas in total at the end of Q2 2026, up 1.86Mn from the prior quarter and down 7.4Mn from a year earlier.
BlackRock, Inc. was the top holder of Magnolia Oil & Gas as of June 30, 2026, with 31.97Mn shares.
Among holders that already owned Magnolia Oil & Gas, the biggest buyers in Q2 2026 were BlackRock, Inc. (+2.48Mn shares), Vanguard Portfolio Management LLC (+2.36Mn shares), T. Rowe Price Associates Inc (+1.47Mn shares), Westwood Holdings Group Inc (+1.05Mn shares) and HRT Financial LP (+514.26K shares).
Holders that trimmed the most shares of Magnolia Oil & Gas in Q2 2026 while keeping a position were Fred Alger Management, LLC (-1.02Mn shares), TD Asset Management Inc (-1.01Mn shares), Boston Trust Walden Corp (-843.15K shares), Voloridge Investment Management, LLC (-828.82K shares) and Arrowstreet Capital, Limited Partnership (-800.28K shares).
Per Business Quant, the top 10 investors in MGY for the quarter ended June 30, 2026 were BlackRock, Inc. (31.97Mn shares), Vanguard Portfolio Management LLC (15.34Mn shares), American Century Companies Inc (11.01Mn shares), State Street Corp (9.94Mn shares), Vanguard Capital Management LLC (7.66Mn shares), Dimensional Fund Advisors LP (7.12Mn shares), Jupiter Topco LLC (6.43Mn shares), Arrowstreet Capital, Limited Partnership (5.46Mn shares), T. Rowe Price Investment Management, Inc. (5.18Mn shares) and Geode Capital Management, LLC (4.8Mn shares).

Form 13F Holdings

409 Institutional Holders

Report period 30 Jun, 2026

Total shares held 205.52Mn

Of outstanding —

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	31,972,219	17.40%	▲2,481,070	+8.41%	$817.85Mn
2	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	15,341,201	8.35%	▲2,357,806	+18.16%	$392.43Mn
3	AMERICAN CENTURY COMPANIES INC	0000748054	11,011,458	5.99%	▲502,218	+4.78%	$281.67Mn
4	State Street Corp	0000093751	9,941,466	5.41%	▲445,191	+4.69%	$254.30Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	7,663,263	4.17%	▲474,839	+6.61%	$196.03Mn
6	DIMENSIONAL FUND ADVISORS LP	0000354204	7,117,449	3.87%	▲88,668	+1.26%	$182.07Mn
7	Jupiter Topco LLC	0002146052	6,427,893	3.50%	▲6,427,893	0.00%	$164.43Mn
8	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	5,463,526	2.97%	▼800,282	-12.78%	$139.76Mn
9	T. Rowe Price Investment Management, Inc.	0001897612	5,180,518	2.82%	▼13,369	-0.26%	$132.52K
10	GEODE CAPITAL MANAGEMENT, LLC	0001214717	4,802,973	2.61%	▲264,861	+5.84%	$122.89Mn
11	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	0000921739	4,311,973	2.35%	▼660,288	-13.28%	$110.30Mn
12	Bank Of America Corp /De/	0000070858	4,253,346	2.32%	▲375,985	+9.70%	$108.80Mn
13	ALLIANCEBERNSTEIN L.P.	0001109448	4,122,434	2.24%	▼328,808	-7.39%	$130.15Mn
14	TD ASSET MANAGEMENT INC	0001056053	3,934,160	2.14%	▼1,007,819	-20.39%	$100.64Mn
15	Epoch Investment Partners, Inc.	0001305841	3,569,975	1.94%	▼705,534	-16.50%	$91.32Mn
16	Morgan Stanley	0000895421	3,429,471	1.87%	▲401,496	+13.26%	$87.73Mn
17	VICTORY CAPITAL MANAGEMENT INC	0001040188	2,982,883	1.62%	▼108,170	-3.50%	$76.30Mn
18	GW&K Investment Management, LLC	0001082917	2,917,419	1.59%	▼163,845	-5.32%	$74.63K
19	SYSTEMATIC FINANCIAL MANAGEMENT LP	0001085936	2,777,352	1.51%	▼35,926	-1.28%	$71.04Mn
20	Allspring Global Investments Holdings, LLC	0001890906	2,667,136	1.45%	▼31,868	-1.18%	$66.63Mn

Showing 1 to 20 of 409 holders