BLACKROCK CALIFORNIA MUNICIPAL SERIES TRUST
    SEC Filings

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    All SEC filings by BLACKROCK CALIFORNIA MUNICIPAL SERIES TRUST — annual and quarterly reports, current reports, registrations, proxies and ownership forms, updated in real time.

    Financials

    N-CENAnnual report (registered investment company)Aug 13, 2026
    N-CSRCertified annual shareholder report (management investment company)Aug 7, 2026
    N-CSRSCertified semi-annual shareholder report (management investment company)Feb 4, 2026
    N-CENAnnual report (registered investment company)Aug 12, 2025
    N-CSRCertified annual shareholder report (management investment company)Aug 5, 2025
    N-CSRSCertified semi-annual shareholder report (management investment company)Feb 4, 2025
    N-CENAnnual report (registered investment company)Aug 9, 2024
    N-CSRCertified annual shareholder report (management investment company)Aug 7, 2024
    N-CSRSCertified semi-annual shareholder report (management investment company)Feb 1, 2024
    N-CENAnnual report (registered investment company)Aug 4, 2023

    Events

    No results found.

    Registrations and Prospectuses

    40-APP/AApplication for exemptive order (Investment Company Act)Sep 30, 2025
    40-APP/AApplication for exemptive order (Investment Company Act)Jun 23, 2025
    40-APP/AApplication for exemptive order (Investment Company Act)Apr 15, 2025
    40-APP/AApplication for exemptive order (Investment Company Act)Aug 5, 2016
    40-APP/AApplication for exemptive order (Investment Company Act)May 13, 2016
    40-APP/AApplication for exemptive order (Investment Company Act)Nov 20, 2015
    40-APPApplication for exemptive order (Investment Company Act)Jun 26, 2015
    40-APPApplication for exemptive order (Investment Company Act)Jun 17, 2010
    AWWithdrawal of amendmentSep 18, 2006
    N-14/ARegistration statement for investment companies business combinationMar 27, 2001

    Proxies

    N-PXAnnual report of proxy voting recordAug 26, 2026
    N-PXAnnual report of proxy voting recordAug 27, 2025
    N-PXAnnual report of proxy voting recordAug 27, 2024
    DEF 14ADefinitive proxySep 18, 2023
    N-PXAnnual report of proxy voting recordAug 25, 2023
    N-PXAnnual report of proxy voting recordAug 25, 2022
    N-PXAnnual report of proxy voting recordAug 27, 2021
    N-PXAnnual report of proxy voting recordAug 27, 2020
    N-PXAnnual report of proxy voting recordAug 29, 2019
    DEF 14ADefinitive proxyOct 3, 2018

    Other

    CORRESPCorrespondence with SECJan 26, 2015
    CORRESPCorrespondence with SECJan 29, 2013
    CORRESPCorrespondence with SECDec 7, 2012

    Ownership

    NPORT-PBlackrock California Municipal Opportunities Fund (may 2026 Report)Jul 24, 2026
    NPORT-PBlackrock California Municipal Opportunities Fund (feb 2026 Report)Apr 23, 2026
    NPORT-PBlackrock California Municipal Opportunities Fund (nov 2025 Report)Jan 23, 2026
    NPORT-PBlackrock California Municipal Opportunities Fund (aug 2025 Report)Oct 27, 2025
    NPORT-PBlackrock California Municipal Opportunities Fund (may 2025 Report)Jul 25, 2025
    NPORT-PBlackrock California Municipal Opportunities Fund (feb 2025 Report)Apr 24, 2025
    NPORT-PBlackrock California Municipal Opportunities Fund (nov 2024 Report)Jan 24, 2025
    NPORT-PBlackrock California Municipal Opportunities Fund (aug 2024 Report)Oct 25, 2024
    NPORT-PBlackrock California Municipal Opportunities Fund (may 2024 Report)Jul 26, 2024
    NPORT-PBlackrock California Municipal Opportunities Fund (feb 2024 Report)Apr 24, 2024