Company · Ownership research

Magnolia Oil & Gas Corp MGY

CIK 0001698990 · CUSIP 559663109

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 559663109 (MGY), not CUSIP 559663909 (MGY), CUSIP 559663959 (MGY), and does not merge CUSIPs.

This page lists the top 20 of 385 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$619.74M 27,568,578 shares	0.01%	-298.62K(-1.10%)Reduced	SEC filing ↗ Aug 12, 2025	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$455.40M 20,257,907 shares	0.01%	-149.80K(-0.70%)Reduced	SEC filing ↗ Aug 11, 2025	▾
03	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$266.64M 11,861,231 shares	0.14%	+1.36M(+12.90%)Added	SEC filing ↗ Aug 12, 2025	▾
04	STATE STREET CORP CIK 93751 · View history	$220.25M 9,797,648 shares	0.01%	-60.31K(-0.60%)Reduced	SEC filing ↗ Aug 14, 2025	▾
05	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$145.09M 6,454,104 shares	0.07%	+3.31K(+0.10%)Added	SEC filing ↗ Aug 14, 2025	▾
06	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$136.83M 6,086,269 shares	0.03%	+720.38K(+13.40%)Added	SEC filing ↗ Aug 12, 2025	▾
07	MACQUARIE GROUP LTD CIK 1418333 · View history	$132.12M 5,877,069 shares	0.16%	+105.24K(+1.80%)Added	SEC filing ↗ Aug 14, 2025	▾
08	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$125.80M 5,595,918 shares	0.08%	-1.67M(-22.90%)Reduced	SEC filing ↗ Aug 14, 2025	▾
09	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$114.91M 5,111,710 shares	0.02%	+94.18K(+1.90%)Added	SEC filing ↗ Aug 14, 2025	▾
10	ALLIANCEBERNSTEIN L.P. CIK 1109448 · View history	$107.35M 4,775,378 shares	0.04%	-622.52K(-11.50%)Reduced	SEC filing ↗ Aug 14, 2025	▾
11	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$101.90M 4,531,855 shares	0.01%	+238.36K(+5.60%)Added	SEC filing ↗ Aug 8, 2025	▾
12	VICTORY CAPITAL MANAGEMENT INC CIK 1040188 · View history	$97.55M 4,339,624 shares	0.06%	-42.43K(-1.00%)Reduced	SEC filing ↗ Aug 13, 2025	▾
13	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$95.51M 4,248,698 shares	0.01%	-93.51K(-2.20%)Reduced	SEC filing ↗ Aug 14, 2025	▾
14	Boston Trust Walden Corp CIK 1534866 · View history	$90.00M 4,003,770 shares	0.64%	+825.16K(+26.00%)Added	SEC filing ↗ Jul 28, 2025	▾
15	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$87.31M 3,884,051 shares	0.01%	+2.32M(+148.70%)Added	SEC filing ↗ Aug 14, 2025	▾
16	SILVERCREST ASSET MANAGEMENT GROUP LLC CIK 1232395 · View history	$82.40M 3,665,306 shares	0.55%	-135.99K(-3.60%)Reduced	SEC filing ↗ Aug 14, 2025	▾
17	Allspring Global Investments Holdings, LLC CIK 1890906 · View history	$75.45M 3,307,951 shares	0.13%	+132.56K(+4.20%)Added	SEC filing ↗ Jul 25, 2025	▾
18	MORGAN STANLEY CIK 895421 · View history	$72.08M 3,206,291 shares	0.00%	+230.66K(+7.80%)Added	SEC filing ↗ Aug 14, 2025	▾
19	GW&K Investment Management, LLC CIK 1082917 · View history	$68.64M 3,053,312 shares	0.61%	-371.53K(-10.80%)Reduced	SEC filing ↗ Aug 11, 2025	▾
20	SYSTEMATIC FINANCIAL MANAGEMENT LP CIK 1085936 · View history	$67.75M 3,013,800 shares	1.81%	+24.05K(+0.80%)Added	SEC filing ↗ Aug 13, 2025	▾

Showing 20 / 385 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

385

Cancelled or null records excluded

Disclosed shares

215,789,874

Not deduplicated across managers

Disclosed value

$4.85B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Magnolia Oil & Gas Corp · Q2 2025

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.