Marine Products Corporation
US ˙ NYSE ˙ US5684271084
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT

SecurityMPX / Marine Products Corporation
InstitutionVanguard Group Inc
Latest Disclosed Ownership584,071 shares
Latest Disclosed Value $ 5,116,461
Vanguard Group Inc reports 1.35% increase in ownership of MPX / Marine Products Corporation

On January 29, 2026 - Vanguard Group Inc filed a 13F-HR form disclosing ownership of 584,071 shares of Marine Products Corporation (US:MPX) valued at $5,116,462 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 7, 2025 disclosing 576,299 shares of Marine Products Corporation. This represents a change in shares of 1.35% during the quarter. The current value of the position is $0 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-01-29 2025-12-31 13F MARINE PRODS COM 568427108 584,071 7,772 1.35 5,116 0.10 0.0001
2025-11-07 2025-09-30 13F MARINE PRODS COM 568427108 576,299 9,219 1.63 5,112 5.93 0.0001
2025-08-11 2025-06-30 13F MARINE PRODS COM 568427108 567,080 4,735 0.84 4,826 2.27 0.0001
2025-05-09 2025-03-31 13F MARINE PRODS COM 568427108 562,345 16,511 3.02 4,718 -5.73 0.0001
2025-02-11 2024-12-31 13F MARINE PRODS COM 568427108 545,834 1,428 0.26 5,005 -5.12 0.0001
2024-11-13 2024-09-30 13F MARINE PRODS COM 568427108 544,406 22,613 4.33 5,275 0.09 0.0001
2024-08-13 2024-06-30 13F MARINE PRODS COM 568427108 521,793 30,593 6.23 5,270 -8.68 0.0001
2024-05-10 2024-03-31 13F MARINE PRODS COM 568427108 491,200 -2,012 -0.41 5,772 2.65 0.0001
2024-03-11 2023-12-31 13F/A-1 MARINE PRODS COM 568427108 493,212 31,227 6.76 5,623 -14.35 0.0001
2024-02-14 2023-12-31 13F MARINE PRODS COM 568427108 493,212 31,227 5,623 0.0001
2023-12-18 2023-09-30 13F/A-1 MARINE PRODS COM 568427108 461,985 8,880 1.96 6,565 -14.07 0.0002
2023-11-14 2023-09-30 13F MARINE PRODS COM 568427108 461,985 8,880 6,565 0.0000
2023-08-14 2023-06-30 13F MARINE PRODS COM 568427108 453,105 -154 -0.03 7,639 27.79 0.0002
2023-07-14 2023-03-31 13F/A-1 MARINE PRODS COM 568427108 453,259 2,259 0.50 5,978 12.62 0.0002
2023-05-15 2023-03-31 13F MARINE PRODS COM 568427108 453,259 2,259 5,978 0.0000
2023-02-10 2022-12-31 13F MARINE PRODS COM 568427108 451,000 1,283 0.29 5,308 39.54 0.0001
2022-11-14 2022-09-30 13F MARINE PRODS COM 568427108 449,717 -1,566 -0.35 3,804 -11.35 0.0001
2022-08-12 2022-06-30 13F MARINE PRODS COM 568427108 451,283 -3,196 -0.70 4,291 -18.27 0.0001
2022-05-13 2022-03-31 13F MARINE PRODS COM 568427108 454,479 -1,056 -0.23 5,250 -7.80 0.0001
2022-02-14 2021-12-31 13F MARINE PRODS COM 568427108 455,535 47,754 11.71 5,694 11.63 0.0001
2021-11-12 2021-09-30 13F MARINE PRODS COM 568427108 407,781 -300,254 -42.41 5,101 -53.34 0.0001
2021-08-13 2021-06-30 13F MARINE PRODS COM 568427108 708,035 12,199 1.75 10,932 -3.44 0.0003
2021-05-14 2021-03-31 13F MARINE PRODS COM 568427108 695,836 21,230 3.15 11,321 15.41 0.0003
2021-02-12 2020-12-31 13F MARINE PRODS COM 568427108 674,606 37,334 5.86 9,809 -1.60 0.0003
2020-11-16 2020-09-30 13F MARINE PRODS COM 568427108 637,272 265,443 71.39 9,968 93.59 0.0003
2020-08-14 2020-06-30 13F MARINE PRODS COM 568427108 371,829 -2,529 -0.68 5,149 70.21 0.0002
2020-05-15 2020-03-31 13F MARINE PRODS COM 568427108 374,358 384 0.10 3,025 -43.83 0.0001
2020-02-14 2019-12-31 13F MARINE PRODS COM 568427108 373,974 -2,108 -0.56 5,385 1.13 0.0002
2019-11-14 2019-09-30 13F MARINE PRODS COM 568427108 376,082 625 0.17 5,325 -8.14 0.0002
2019-08-14 2019-06-30 13F MARINE PRODS COM 568427108 375,457 -416 -0.11 5,797 14.50 0.0002
2019-05-15 2019-03-31 13F MARINE PRODS COM 568427108 375,873 6,847 1.86 5,063 -18.86 0.0002
2019-02-14 2018-12-31 13F MARINE PRODS COM 568427108 369,026 -5,210 -1.39 6,240 -27.15 0.0003
2018-12-13 2018-09-30 13F/A-2 MARINE PRODS COM 568427108 374,236 1,159 0.31 8,566 29.14 0.0003
2018-11-23 2018-09-30 13F/A-1 MARINE PRODS COM 568427108 374,236 0 8,566 0.0003
2018-11-14 2018-09-30 13F MARINE PRODS COM 568427108 374,236 1,159 8,566
2018-08-14 2018-06-30 13F MARINE PRODS COM 568427108 373,077 -17,601 -4.51 6,633 21.17 0.0003
2018-05-15 2018-03-31 13F MARINE PRODS COM 568427108 390,678 -5,373 -1.36 5,474 8.48 0.0002
2018-02-14 2017-12-31 13F MARINE PRODS COM 568427108 396,051 6,654 1.71 5,046 -19.26 0.0002
2017-11-14 2017-09-30 13F MARINE PRODS COM 568427108 389,397 -3,984 -1.01 6,250 1.77 0.0003
2017-08-24 2017-06-30 13F/A-1 MARINE PRODS COM 568427108 393,381 6,385 1.65 6,141 45.97 0.0003
2017-08-11 2017-06-30 13F MARINE PRODS COM 568427108 393,381 6,385 6,141
2017-05-12 2017-03-31 13F MARINE PRODS COM 568427108 386,996 73,090 23.28 4,207 -3.38 0.0002
2017-02-14 2016-12-31 13F MARINE PRODS COM 568427108 313,906 -214,689 -40.62 4,354 -8.16 0.0002
2016-11-14 2016-09-30 13F MARINE PRODS COM 568427108 528,595 -31,766 -5.67 4,741 0.00 0.0003
2016-08-10 2016-06-30 13F MARINE PRODS COM 568427108 560,361 -38,449 -6.42 4,741 4.31 0.0003
2016-05-13 2016-03-31 13F MARINE PRODS COM 568427108 598,810 4,624 0.78 4,545 26.67 0.0003
2016-02-08 2015-12-31 13F MARINE PRODS COM 568427108 594,186 10,511 1.80 3,588 -11.43 0.0002
2015-11-12 2015-09-30 13F/A-1 MARINE PRODS COM 568427108 583,675 25,315 4.53 4,051 16.27 0.0002
2015-11-12 2015-09-30 13F/A-1 MARINE PRODS COM 568427108 583,675 25,315 4,051 0.0002
2015-08-13 2015-06-30 13F MARINE PRODS COM 568427108 558,360 10,803 1.97 3,484 -25.75 0.0002
2015-05-15 2015-03-31 13F/A-1 MARINE PRODS COM 568427108 547,557 27,516 5.29 4,692 6.90 0.0003
2015-05-14 2015-03-31 13F MARINE PRODS COM 568427108 547,557 4,692
2015-02-12 2014-12-31 13F MARINE PRODS COM 568427108 520,041 5,914 1.15 4,389 8.21 0.0003
2014-11-12 2014-09-30 13F MARINE PRODS COM 568427108 514,127 4,924 0.97 4,056 -4.02 0.0003
2014-08-11 2014-06-30 13F MARINE PRODS COM 568427108 509,203 8,838 1.77 4,226 12.30 0.0003
2014-05-13 2014-03-31 13F MARINE PRODS COM 568427108 500,365 8,989 1.83 3,763 -23.81 0.0003
2014-02-12 2013-12-31 13F MARINE PRODS COM 568427108 491,376 23,126 4.94 4,939 16.16 0.0004
2013-11-07 2013-09-30 13F MARINE PRODS COM 568427108 468,250 7,997 1.74 4,252 15.20 0.0004
2013-08-13 2013-06-30 13F MARINE PRODS COM 568427108 460,253 460,253 3,691 0.0004
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.