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Explore comparable companies, their recorded firm relationships and recurring board connections. Follow companies to see newly detected public records in your private watchlist.

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    SirenOpt

    Manufacturing · United States

    View company and funding history →

    Comparable companies share a recorded industry, sector or firm board link. Suggested firms have high-confidence board links to these companies. Board links do not establish an investment, a warm introduction or willingness to invest. Broad SEC industry categories can include very different businesses. Missing links mean the public record is incomplete.

    Comparable companies

    Ranked by recorded sector, industry and shared firm relationships; geography and raise size help order the results.

    Buckeye Corrugated
    • Same SEC industry: Manufacturing

    $37.7M reported sold · Latest offering Aug 28, 2026

    Blue Frontier
    • Same SEC industry: Manufacturing

    $16.9M reported sold · Latest offering Jan 5, 2024

    Ogee
    • Same SEC industry: Manufacturing

    $11.3M reported sold · Latest offering Feb 17, 2023

    Sparkling Cocktail
    • Same SEC industry: Manufacturing

    $28.7M reported sold · Latest offering Dec 9, 2021

    Green Dot Bioplastics
    • Same SEC industry: Manufacturing

    $11.1M reported sold · Latest offering Nov 10, 2021

    New Primal
    • Same SEC industry: Manufacturing

    $21.2M reported sold · Latest offering Aug 6, 2021

    Calco Holdings
    • Same SEC industry: Manufacturing

    $17.0M reported sold · Latest offering Jan 2, 2020

    Topdown
    • Same SEC industry: Manufacturing

    $18.5M reported sold · Latest offering Jun 7, 2018

    Health-Ade
    • Same SEC industry: Manufacturing

    $34.1M reported sold · Latest offering Nov 6, 2017

    Si Holdings
    • Same SEC industry: Manufacturing

    $73.6M reported sold · Latest offering Jun 15, 2017

    AeroShield Materials
    • Same SEC industry: Manufacturing

    $19.8M reported sold · Latest offering Oct 15, 2026

    Firms to research

    These firms have board links to comparable companies and no recorded board link to SirenOpt. Treat them as research leads; their investment interest is unverified.

    Firms already on record

    High-confidence board links to the selected company.

    No high-confidence firm board links are recorded for this company yet. This does not mean it has no investors.

    Firms appearing together

    Shared company board records involving firms above, across the public graph. A shared record is evidence of a connection, not proof of a shared investment round.

    No shared firm board records are available for these firms yet.