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

SecurityMPX / Marine Products Corporation
InstitutionMorgan Stanley
Latest Disclosed Ownership30,695 shares
Latest Disclosed Value $ 223,160
Morgan Stanley reports 68.19% decrease in ownership of MPX / Marine Products Corporation

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 30,695 shares of Marine Products Corporation (US:MPX) valued at $223,153 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 96,487 shares of Marine Products Corporation. This represents a change in shares of -68.19% 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)
2026-05-15 2026-03-31 13F MARINE PRODS COM 568427108 30,695 -65,792 -68.19 223 -73.61 0.0000
2026-05-27 2025-12-31 13F/A-1 MARINE PRODS COM 568427108 96,487 19,942 26.05 845 24.63 0.0001
2026-02-13 2025-12-31 13F MARINE PRODS COM 568427108 96,487 19,942 845 0.0001
2026-05-27 2025-09-30 13F/A-1 MARINE PRODS COM 568427108 76,545 2,305 3.10 679 7.45 0.0000
2025-11-14 2025-09-30 13F MARINE PRODS COM 568427108 76,545 2,305 679 0.0000
2025-08-15 2025-06-30 13F MARINE PRODS COM 568427108 74,240 21,804 41.58 632 43.74 0.0000
2025-05-15 2025-03-31 13F MARINE PRODS COM 568427108 52,436 863 1.67 440 -6.99 0.0000
2025-05-15 2024-12-31 13F/A-1 MARINE PRODS COM 568427108 51,573 7,157 16.11 473 9.77 0.0000
2025-02-14 2024-12-31 13F MARINE PRODS COM 568427108 51,573 7,157 473 0.0000
2025-05-14 2024-09-30 13F/A-2 MARINE PRODS COM 568427108 44,416 -103,805 -70.03 430 -71.28 0.0000
2025-02-14 2024-09-30 13F/A-1 MARINE PRODS COM 568427108 44,416 -103,805 430 0.0000
2024-11-14 2024-09-30 13F MARINE PRODS COM 568427108 44,416 -103,805 430 0.0000
2025-05-14 2024-06-30 13F/A-2 MARINE PRODS COM 568427108 148,221 -50,100 -25.26 1,497 -35.75 0.0001
2024-10-17 2024-06-30 13F/A-1 MARINE PRODS COM 568427108 148,221 -50,100 1,497 0.0001
2024-08-14 2024-06-30 13F MARINE PRODS COM 568427108 148,221 -50,100 1,497 0.0001
2024-10-17 2024-03-31 13F/A-2 MARINE PRODS COM 568427108 198,321 139,042 234.56 2,330 245.19 0.0002
2024-08-16 2024-03-31 13F/A-1 MARINE PRODS COM 568427108 198,321 139,042 2,330 0.0000
2024-05-15 2024-03-31 13F MARINE PRODS COM 568427108 198,321 139,042 2,330 0.0002
2024-08-16 2023-12-31 13F/A-1 MARINE PRODS COM 568427108 59,279 27,331 85.55 676 49.01 0.0001
2024-02-13 2023-12-31 13F MARINE PRODS COM 568427108 59,279 27,331 676 0.0001
2023-11-15 2023-09-30 13F MARINE PRODS COM 568427108 31,948 -526 -1.62 454 -17.18 0.0000
2023-08-14 2023-06-30 13F MARINE PRODS COM 568427108 32,474 4,306 15.29 548 47.44 0.0001
2023-05-15 2023-03-31 13F MARINE PRODS COM 568427108 28,168 4,278 17.91 372 32.03 0.0000
2023-02-14 2022-12-31 13F MARINE PRODS COM 568427108 23,890 -2,926 -10.91 281 23.25 0.0000
2022-11-14 2022-09-30 13F MARINE PRODS COM 568427108 26,816 -4,974 -15.65 228 -24.75 0.0000
2022-10-27 2022-06-30 13F/A-1 MARINE PRODS COM 568427108 31,790 27,302 608.33 303 482.69 0.0000
2022-08-15 2022-06-30 13F MARINE PRODS COM 568427108 31,790 27,302 303 0.0000
2022-10-27 2022-03-31 13F/A-1 MARINE PRODS COM 568427108 4,488 482 12.03 52 1.96 0.0000
2022-05-13 2022-03-31 13F MARINE PRODS COM 568427108 4,488 482 52 0.0000
2022-02-14 2021-12-31 13F MARINE PRODS COM 568427108 4,006 -686,918 -99.42 51 -99.41 0.0000
2021-11-15 2021-09-30 13F MARINE PRODS COM 568427108 690,924 480,843 228.88 8,644 166.46 0.0012
2021-08-23 2021-06-30 13F/A-1 MARINE PRODS COM 568427108 210,081 11,053 5.55 3,244 0.19 0.0004
2021-08-16 2021-06-30 13F MARINE PRODS COM 568427108 210,081 11,053 3,244 0.0001
2021-05-17 2021-03-31 13F MARINE PRODS COM 568427108 199,028 192,547 2,970.95 3,238 3,344.68 0.0005
2021-02-16 2020-12-31 13F MARINE PRODS COM 568427108 6,481 4,126 175.20 94 154.05 0.0000
2020-11-13 2020-09-30 13F MARINE PRODS COM 568427108 2,355 -127 -5.12 37 8.82 0.0000
2020-08-14 2020-06-30 13F MARINE PRODS COM 568427108 2,482 -1,226 -33.06 34 13.33 0.0000
2020-05-26 2020-03-31 13F/A-1 MARINE PRODS COM 568427108 3,708 -8,912 -70.62 30 -83.33 0.0000
2020-05-15 2020-03-31 13F MARINE PRODS COM 568427108 3,708 -8,912 30 2.3046
2020-02-14 2019-12-31 13F MARINE PRODS COM 568427108 12,620 10,405 469.75 180 480.65 0.0000
2019-11-14 2019-09-30 13F MARINE PRODS COM 568427108 2,215 -3,728 -62.73 31 -66.30 0.0000
2019-08-14 2019-06-30 13F MARINE PRODS COM 568427108 5,943 -12,966 -68.57 92 -63.92 0.0000
2019-05-15 2019-03-31 13F MARINE PRODS COM 568427108 18,909 -35,715 -65.38 255 -72.40 0.0001
2019-02-14 2018-12-31 13F MARINE PRODS COM 568427108 54,624 10,746 24.49 924 -8.06 0.0003
2019-04-23 2018-09-30 13F/A-2 MARINE PRODS COM 568427108 43,878 -8,286 -15.88 1,005 8.41 0.0003
2018-11-20 2018-09-30 13F/A-1 MARINE PRODS COM 568427108 43,878 0 1,005 0.0003
2018-11-14 2018-09-30 13F MARINE PRODS COM 568427108 43,878 -8,286 1,005
2019-04-23 2018-06-30 13F/A-1 MARINE PRODS COM 568427108 52,164 -9,649 -15.61 927 7.04 0.0003
2018-08-14 2018-06-30 13F MARINE PRODS COM 568427108 52,164 -9,649 927
2019-04-23 2018-03-31 13F/A-1 MARINE PRODS COM 568427108 61,813 -39,897 -39.23 866 -33.13 0.0002
2018-05-14 2018-03-31 13F MARINE PRODS COM 568427108 61,813 -39,897 866
2019-04-23 2017-12-31 13F/A-1 MARINE PRODS COM 568427108 101,710 -56,446 -35.69 1,295 -49.02 0.0004
2018-02-14 2017-12-31 13F MARINE PRODS COM 568427108 101,710 -56,446 1,295
2017-11-14 2017-09-30 13F MARINE PRODS COM 568427108 158,156 -4,721 -2.90 2,540 -0.12 0.0008
2017-08-11 2017-06-30 13F MARINE PRODS COM 568427108 162,877 9,558 6.23 2,543 52.55 0.0008
2017-05-22 2017-03-31 13F/A-1 MARINE PRODS COM 568427108 153,319 -24,574 -13.81 1,667 -32.46 0.0005
2017-05-12 2017-03-31 13F MARINE PRODS COM 568427108 153,319 1,667
2017-02-22 2016-12-31 13F/A-1 MARINE PRODS COM 568427108 177,893 46,877 35.78 2,468 110.04 0.0008
2017-02-13 2016-12-31 13F MARINE PRODS COM 568427108 177,893 2,468
2016-11-10 2016-09-30 13F MARINE PRODS COM 568427108 131,016 53,657 69.36 1,175 79.66 0.0004
2016-08-12 2016-06-30 13F MARINE PRODS COM 568427108 77,359 3,828 5.21 654 17.20 0.0002
2016-05-12 2016-03-31 13F MARINE PRODS COM 568427108 73,531 -7,607 -9.38 558 13.88 0.0002
2016-02-09 2015-12-31 13F MARINE PRODS COM 568427108 81,138 -13,148 -13.94 490 -25.08 0.0002
2016-02-08 2015-09-30 13F/A-1 MARINE PRODS COM 568427108 94,286 67,010 245.67 654 284.71 0.0002
2015-11-09 2015-09-30 13F MARINE PRODS COM 568427108 94,286 654
2015-08-12 2015-06-30 13F MARINE PRODS COM 568427108 27,276 27,276 -71.07 170 -74.01 0.0001
2015-05-14 2015-03-31 13F MARINE PRODS COM 568427108 0 -4,410 -100.00 0 -100.00
2015-02-13 2014-12-31 13F MARINE PRODS COM 568427108 4,410 1,386 45.83 37 54.17 0.0000
2014-12-16 2014-09-30 13F/A-1 MARINE PRODS COM 568427108 3,024 398 15.16 24 20.00 0.0000
2014-11-14 2014-09-30 13F MARINE PRODS COM 568427108 3,024 24
2014-05-13 2014-03-31 13F MARINE PRODS COM 568427108 2,626 2,439 1,304.28 20 900.00 0.0000
2014-02-13 2013-12-31 13F MARINE PRODS COM 568427108 187 187 2 0.0000
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.