86 institutions reported holding $40.8M of MARINE PRODS CORP (MPX) in SEC 13F filings for 2026-03-31. Largest institutional holders: DIMENSIONAL FUND ADVISORS LP ($5.6M), BlackRock, Inc. ($4.5M), GAMCO INVESTORS, INC. ET AL ($3.7M), VANGUARD CAPITAL MANAGEMENT LLC ($3.3M), DEPRINCE RACE & ZOLLO INC ($3.2M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | DIMENSIONAL FUND ADVISORS LP | $5.6M | 767,510 | Added |
| 2 | BlackRock, Inc. | $4.5M | 625,523 | Trimmed |
| 3 | GAMCO INVESTORS, INC. ET AL | $3.7M | 508,571 | Added |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $3.3M | 450,268 | New |
| 5 | DEPRINCE RACE & ZOLLO INC | $3.2M | 446,447 | Added |
| 6 | Russell Investments Group, Ltd. | $2.8M | 387,577 | Added |
| 7 | De Lisle Partners LLP | $2.6M | 363,696 | Hold |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $1.9M | 260,637 | Added |
| 9 | GABELLI FUNDS LLC | $1.7M | 232,500 | Hold |
| 10 | Teton Advisors, LLC | $1.6M | 223,000 | Trimmed |
| 11 | STATE STREET CORP | $1.3M | 181,372 | Trimmed |
| 12 | Bank of New York Mellon Corp | $1.2M | 158,818 | Added |
| 13 | K2 PRINCIPAL FUND, L.P. | $873,970 | 120,216 | New |
| 14 | NORTHERN TRUST CORP | $624,028 | 85,836 | Trimmed |
| 15 | HANOVER ADVISORS INC | $568,041 | 78,135 | Hold |
| 16 | VANGUARD FIDUCIARY TRUST CO | $523,193 | 71,966 | New |
| 17 | RENAISSANCE TECHNOLOGIES LLC | $479,835 | 66,002 | Trimmed |
| 18 | ABC ARBITRAGE SA | $451,227 | 62,067 | New |
| 19 | AMERICAN CENTURY COMPANIES INC | $395,742 | 54,435 | Trimmed |
| 20 | TRUIST FINANCIAL CORP | $392,580 | 54,000 | Hold |
| 21 | VANGUARD PORTFOLIO MANAGEMENT LLC | $377,342 | 51,904 | New |
| 22 | GOLDMAN SACHS GROUP INC | $315,467 | 43,393 | Trimmed |
| 23 | Virtu Financial LLC | $227,000 | 31,178 | New |
| 24 | MORGAN STANLEY | $223,160 | 30,695 | Trimmed |
| 25 | Pinnacle Financial Partners, Inc. | $222,208 | 30,565 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31