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HEARTLAND ADVISORS INC

Position in MGY — Magnolia Oil & Gas Corp

CIK 937394 MILWAUKEE, WI

Position in MGY

as of Jun 30, 2026 · filed Aug 11, 2026
Position Value
$15,743,850
-$4,160,245 QoQ
Shares Held
615,475
-2.4% QoQ
Ownership
0.260%
of shares outstanding
% of Portfolio
0.70%
of 13F equity value
Holder Rank
#48
of 408 holders
Holding Since
Mar 2024
10 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in MGY Over Time

Shares Held

Position Value (USD)

Position in Oil & Gas E&P

Energy · as of Jun 30, 2026

HEARTLAND ADVISORS INC holds $44,002,223 across 3 Oil & Gas E&P names. MGY ranks #2 (35.8% of the industry book) .

# Ticker Company Shares Value (USD) Open
2 MGY
Magnolia Oil & Gas Corp
This page
615,475 $15,743,850

All Filings in MGY

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10 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $15,743,850 615,475
2026-03-31 $19,904,095 630,475
2025-12-31 $14,255,840 651,249
2025-09-30 $13,756,042 576,290
2025-06-30 $6,744,000 300,000
2025-03-31 $7,578,000 300,000
2024-12-31 $7,014,000 300,000
2024-09-30 $7,326,000 300,000
2024-06-30 $7,602,000 300,000
2024-03-31 $7,785,000 300,000