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MARPS · Marine Petroleum Trust

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$4.60 +0.24 (+5.45%) At close · Aug 31
Market Cap
$8.72M
Shares
2.00M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 8
Total Value: $273,904
Total Shares: 60,599

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 8 13F filers · Δ vs Mar 31, 2026
Top Holder
59.1%
Sep 2023 → Jun 2026 · range 43.5% – 81.8%
+15.7 pts
Top 5
98.6%
Sep 2023 → Jun 2026 · range 98.1% – 100.0%
−0.2 pts
Top 10
100.0%
Sep 2023 → Jun 2026 · range 100.0% – 100.0%
0.0 pts
HHI
4,603
Sep 2023 → Jun 2026 · range 3,181 – 6,923
Highly concentrated+1,421

Quarterly Activity

vs Mar 31, 2026
New
1
Increased
4
Decreased
2
Sold Out
1
Unchanged
1
Holder count: 0
Institutional value: -17.6%
Shares held: -3.2%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 8 of 8
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 62362 CUSIP 568423107 13F (30d) 6 filings 6 filers Visit website