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 379 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	$605.73M 27,671,647 shares	0.01%	+228.30K(+0.80%)Added	SEC filing ↗ Feb 12, 2026	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$430.03M 19,644,960 shares	0.01%	-230.90K(-1.20%)Reduced	SEC filing ↗ Jan 29, 2026	▾
03	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$241.44M 11,029,847 shares	0.12%	-857.81K(-7.20%)Reduced	SEC filing ↗ Feb 13, 2026	▾
04	STATE STREET CORP CIK 93751 · View history	$192.65M 8,800,807 shares	0.01%	+125.71K(+1.40%)Added	SEC filing ↗ Feb 13, 2026	▾
05	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$145.23M 6,634,362 shares	0.03%	+264.65K(+4.20%)Added	SEC filing ↗ Feb 12, 2026	▾
06	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$133.74M 6,109,462 shares	0.06%	-245.76K(-3.90%)Reduced	SEC filing ↗ Feb 17, 2026	▾
07	TD Asset Management Inc CIK 1056053 · View history	$124.16M 5,671,819 shares	0.10%	+1.19M(+26.60%)Added	SEC filing ↗ Feb 10, 2026	▾
08	Epoch Investment Partners, Inc. CIK 1305841 · View history	$116.68M 5,330,064 shares	0.66%	+1.19M(+28.80%)Added	SEC filing ↗ Feb 13, 2026	▾
09	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$113.97M 5,206,612 shares	0.02%	-18.56K(-0.40%)Reduced	SEC filing ↗ Feb 17, 2026	▾
10	NOMURA ASSET MANAGEMENT INTERNATIONAL INC. CIK 921739 · View history	$108.56M 4,959,218 shares	0.16%	—	SEC filing ↗ Feb 17, 2026	▾
11	ALLIANCEBERNSTEIN L.P. CIK 1109448 · View history	$103.92M 4,747,597 shares	0.03%	+88.93K(+1.90%)Added	SEC filing ↗ Feb 17, 2026	▾
12	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$97.12M 4,435,901 shares	0.01%	-85.08K(-1.90%)Reduced	SEC filing ↗ Feb 9, 2026	▾
13	Boston Trust Walden Corp CIK 1534866 · View history	$91.24M 4,168,085 shares	0.69%	+225.35K(+5.70%)Added	SEC filing ↗ Jan 28, 2026	▾
14	T. Rowe Price Investment Management, Inc. CIK 1897612 · Amended · View history	$87.32M 3,989,190 shares	0.06%	-1.59M(-28.50%)Reduced	SEC filing ↗ Feb 19, 2026	▾
15	VICTORY CAPITAL MANAGEMENT INC CIK 1040188 · View history	$78.63M 3,591,921 shares	0.04%	-366.58K(-9.30%)Reduced	SEC filing ↗ Feb 13, 2026	▾
16	SILVERCREST ASSET MANAGEMENT GROUP LLC CIK 1232395 · View history	$72.96M 3,333,105 shares	0.50%	-257.33K(-7.20%)Reduced	SEC filing ↗ Feb 17, 2026	▾
17	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$70.45M 3,218,349 shares	0.01%	-21.65K(-0.70%)Reduced	SEC filing ↗ Feb 17, 2026	▾
18	GW&K Investment Management, LLC CIK 1082917 · View history	$69.38M 3,169,496 shares	0.60%	+404.40K(+14.60%)Added	SEC filing ↗ Feb 11, 2026	▾
19	Allspring Global Investments Holdings, LLC CIK 1890906 · View history	$65.88M 2,930,693 shares	0.11%	-147.67K(-4.80%)Reduced	SEC filing ↗ Jan 15, 2026	▾
20	SYSTEMATIC FINANCIAL MANAGEMENT LP CIK 1085936 · View history	$64.33M 2,938,904 shares	1.52%	-33.45K(-1.10%)Reduced	SEC filing ↗ Feb 9, 2026	▾

Showing 20 / 379 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

379

Cancelled or null records excluded

Disclosed shares

199,460,180

Not deduplicated across managers

Disclosed value

$4.37B

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 · Q4 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.