Marine Products Corporation (MPX)

Accumulating

Institutional accumulation: ownership increased +1.19% quarter-over-quarter.

Data as of Q1 2026

Institutional Ownership

16.37%

QoQ Change

+1.19%

Total Value

$40.3B

Shares Outstanding

34.2M

Crowding AnalysisCrowded

Holders74of 5,944

Avg: 68

Uncrowded85th percentileCrowded

Institutional Activity

Buy/Sell Ratio0.76x

61th percentile

32 buying42 selling

+14

New

-12

Closed

+258K

Net shares

Holding Period Distribution

estimate

Median: 4 QAvg: 4.7 QHolders: 74

Ownership Concentration

Top 5: 49.9%Top 10: 76.1%

DIMENSIONAL FUND ADVISORS13.7%

BlackRock,11.2%

GAMCO INVESTORS, INC. ET AL9.1%

VANGUARD CAPITAL MANAGEMENT8.0%

DEPRINCE RACE & ZOLLO8.0%

Others (69)50.1%

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Conviction-Weighted Ownership

Median weight: 0.01%Avg weight: 0.16%Max: 1.14%High conviction (>1%): 1

DIMENSIONAL FUND ADVISORS

BlackRock,

GAMCO INVESTORS, INC. ET AL

VANGUARD CAPITAL MANAGEMENT

DEPRINCE RACE & ZOLLO

Russell Investments Group,

De Lisle Partners LLP

GEODE CAPITAL MANAGEMENT,

GABELLI FUNDS

Teton Advisors,

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Whale Moves Timeline (8 Quarters)

Biggest dollar-value position changes among top 10 holders

NEWVANGUARD CAPITAL MANAGEMENT$3M450K shr

BOUGHTRussell Investments Group$569K78K shr

BOUGHTDEPRINCE RACE & ZOLLO$219K30K shr

BOUGHTDIMENSIONAL FUND ADVISORS$153K21K shr

BOUGHTGEODE CAPITAL MANAGEMENT$79K11K shr

NEWGABELLI FUNDS$2M233K shr

BOUGHTDEPRINCE RACE & ZOLLO$901K103K shr

BOUGHTRussell Investments Group$420K48K shr

SOLDTeton Advisors$171K20K shr

BOUGHTVANGUARD GROUP$68K8K shr

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Institutional Trends (8 Quarters)

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Institutional Holders

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