AmBase Corporation
    SEC Filings

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    All SEC filings by AmBase Corporation (ABCP) — annual and quarterly reports, current reports, registrations, proxies and ownership forms, updated in real time.

    Financials

    10-QQuarterly reportView DiffAug 12, 2026
    10-QQuarterly reportView DiffMay 11, 2026
    10-KAnnual reportView DiffMar 30, 2026
    10-QQuarterly reportView DiffNov 6, 2025
    10-QQuarterly reportView DiffAug 13, 2025
    10-QQuarterly reportView DiffMay 13, 2025
    10-KAnnual reportView DiffMar 24, 2025
    10-QQuarterly reportView DiffNov 13, 2024
    10-QQuarterly reportView DiffAug 9, 2024
    10-QQuarterly reportView DiffMay 9, 2024

    Events

    8-KCurrent reportJul 31, 2026
    8-KSubmission of Matters to a Vote of Security HoldersMay 29, 2026
    8-KEntry Into a Material Definitive AgreementMar 4, 2026
    8-KEntry Into a Material Definitive AgreementFeb 25, 2026
    8-KEntry Into a Material Definitive AgreementJan 29, 2026
    8-KDeparture of Directors or Certain OfficersJan 21, 2026
    8-KEntry Into a Material Definitive AgreementDec 19, 2025
    8-KEntry Into a Material Definitive AgreementNov 26, 2025
    8-KEntry Into a Material Definitive AgreementSep 29, 2025
    8-KEntry Into a Material Definitive AgreementSep 11, 2025

    Registrations and Prospectuses

    S-8Registration of securities for employeesFeb 28, 1997

    Proxies

    DEF 14ADefinitive proxyView DiffMar 31, 2026
    DEFA14AAdditional proxy soliciting materialsApr 23, 2025
    DEF 14ADefinitive proxyView DiffMar 25, 2025
    DEFA14AAdditional proxy soliciting materialsApr 3, 2024
    DEF 14ADefinitive proxyView DiffApr 3, 2024
    PRE 14APreliminary proxyMar 22, 2024
    DEF 14ADefinitive proxyView DiffMar 30, 2023
    DEF 14ADefinitive proxyView DiffMar 29, 2022
    DEF 14ADefinitive proxyView DiffMar 26, 2021
    DEFA14AAdditional proxy soliciting materialsMay 19, 2020

    Other

    UPLOADLetter from SECJan 30, 2014
    CORRESPCorrespondence with SECJan 17, 2014
    UPLOADLetter from SECDec 16, 2013
    UPLOADLetter from SECJan 18, 2013
    CORRESPCorrespondence with SECJan 4, 2013
    UPLOADLetter from SECDec 20, 2012
    UPLOADLetter from SECJan 22, 2010
    CORRESPCorrespondence with SECDec 18, 2009
    UPLOADLetter from SECDec 4, 2009
    UPLOADLetter from SECMay 10, 2007

    Ownership

    SC 13D/ABeneficial ownership reportMay 1, 2024
    4Barc Investments LlcMay 1, 2024
    4Jerry Y CarnegieMay 1, 2024
    SC 13D/ABeneficial ownership reportApr 1, 2024
    SC 13D/AAmbase CorpMar 26, 2024
    SC 13D/AAmbase CorpMar 13, 2024
    SC 13D/ABeneficial ownership reportMar 8, 2024
    4Barc Investments LlcMar 7, 2024
    SC 13D/AAmbase CorpFeb 23, 2024
    SC 13D/AAmbase CorpFeb 20, 2024