$MGY

$26.46 +$0.31 (1.19%) Close

$MGY Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 237.0M shares outstanding

Who owns MGY?

By type of holder

Institutions 86.7% Insiders 0.0% Everyone else 13.3%

Concentration Top 10 holders own 44.1%

BlackRock, Inc. 13.5% · Vanguard Portfolio Management LLC 6.5%

Institutional ownership

86.7%

+0.7 pts vs last qtr

Institutional holders

408

+2 vs last qtr

Net shares bought

+1.5M

by institutions in Q2 2026

New / sold out

58 / 56

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Jupiter Topco LLC NEW +6.4M
BlackRock, Inc. +2.5M

Biggest sellers in Q2 2026

Janus Henderson Group PLC SOLD OUT −6.3M
Fred Alger Management, LLC −1.0M

Who is planning to sell?

Notices of proposed sale, last 12 months

$10.8M

7 notices from 7 people

Shares covered

369.9K

0.16% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Timothy D. Yang Officer $4.38M
Stavros Christopher G Officer $3.51M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2019–FY2025

+11.1%

+1.77% a year

Each share's claim on the business

−10.0%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $108M

over 7 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years69% 3–5 years9% 1–3 years12% Under 1 year10%

Quarterly turnover

11.2%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting MGY on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	32.0M	13.49%	+2.5M (+8.4%)	≤2021	0.0%
Shares held by quarter Peak holding32.0M (Q2'26) Change over 8 quarters+2.8M Share of the company13.490% BlackRock, Inc.'s full portfolio →
VP Vanguard Portfolio Management LLC	15.3M	6.47%	+2.4M (+18.2%)	≤2021	0.0%
Shares held by quarter Peak holding15.3M (Q2'26) Change over 8 quarters+15.3M Share of the company6.470% Vanguard Portfolio Management LLC's full portfolio →

BlackRock, Inc.

32.0M

% of company

13.49%

Change vs last qtr

+2.5M (+8.4%)

Held since

≤2021

Vanguard Portfolio Management LLC

15.3M

% of company

6.47%

Change vs last qtr

+2.4M (+18.2%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Magnolia Oil & Gas Corp, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting MGY on Form N-PORT; together they hold 51.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IC iShares Core S&P Small-Cap ETF iShares Trust	$285M	11.1M	4.70%	0.26%	June 30, 2026
AU Avantis U.S. Small Cap Value ETF American Century ETF Trust	$173M	6.3M	2.67%	0.64%	May 31, 2026

iShares Core S&P Small-Cap ETF

iShares Trust

Position value

$285M

% of company

4.70%

% of the fund

0.26%

As of

June 30, 2026

Avantis U.S. Small Cap Value ETF

American Century ETF Trust

Position value

$173M

% of company

2.67%

% of the fund

0.64%

As of

May 31, 2026

23 more funds behind a free account

See every fund holding Magnolia Oil & Gas Corp and how much of the fund the position is.

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