How many institutions held MGY - Magnolia Oil & Gas Corp - Class A Common Stock, par value $0.0001 in Q1 2026?

406 institutional investors reported MGY - Magnolia Oil & Gas Corp - Class A Common Stock, par value $0.0001 for Q1 2026. Use the holders table for investor-level position and value details.

Magnolia Oil & Gas Corp - Class A Common Stock, par value $0.0001 (MGY)

Q: What does CUSIP 559663109 represent in this 13F holders report?

CUSIP 559663109 is the security identifier for MGY - Magnolia Oil & Gas Corp - Class A Common Stock, par value $0.0001 used to aggregate holder disclosures.

CUSIP: 559663109

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Class A Common Stock, par value $0.0001
Total 13F shares: 203,793,749
Total 13F value: $6,385,853,701
Share change: +2,786,594
Put/Call ratio: 160%
SEC-reported price per share: $31.57
Number of holders: 406
Value change: +$182,991,778
Number of buys: 214
Number of sells: 178
Shares outstanding: 269,255,853

Security key

559663109

Report period

Q1 2026

Institutions

406

Top holders

MGY full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 Magnolia Oil & Gas Corp SEC filings Magnolia Oil & Gas Corp company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 559663109

Newer quarter: Q3 2026

Recent filing periods:

Q3 2026

Ownership snapshot

Top reported holders of MGY - Magnolia Oil & Gas Corp - Class A Common Stock, par value $0.0001 (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

BlackRock, Inc.

Disclosed value leader

BlackRock, Inc.

Comparable rows

15/15

Latest evidence

31 Mar 2026

13F 13D/G Lead comparable stake: 14% 13D/G row: BlackRock, Inc. Showing 1-6 of 15 holder rows.

Quick read

BlackRock, Inc. leads the comparable SEC ownership view at 14%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens BlackRock, Inc.'s linked filing trail.

Comparable ownership Top 5

BlackRock, Inc. 14%

STATE STREET CORP 5.1%

FIRST TRUST PORTFOLIOS LP 1.8%

VANGUARD GROUP INC 7.3%

AMERICAN CENTURY COMPANIES INC 4.1%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
BlackRock, Inc.	13F 13D/G Company 13F 13D/G	14% from 13D/G	$605,732,341 27,671,647 shares	—	31 Dec 2025
STATE STREET CORP	13D/G 13F STATE STREET CORPORATION · Company 13D/G 13F	5.1%	$281,944,405 9,496,275 shares	+$24,380,686	31 Mar 2026
FIRST TRUST PORTFOLIOS LP	13D/G First Trust Portfolios L.P. 13D/G	1.8%	$73,923,001 3,411,306 shares	-$335,308,470	31 Mar 2025
VANGUARD GROUP INC	13F Company 13F	7.3%	$430,028,174 19,644,960 shares	—	31 Dec 2025
AMERICAN CENTURY COMPANIES INC	13F Company 13F	4.1%	$241,443,413 11,029,847 shares	—	31 Dec 2025
DIMENSIONAL FUND ADVISORS LP	13F Company 13F	2.5%	$145,229,795 6,634,362 shares	—	31 Dec 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

406

203,793,749

Rows available

406

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

406

Q1 2026 holders

406

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend