{"cik":"0001877939","ticker":"CTM","name":"Castellum, Inc.","sic_code":"8742","sic_description":"Services-Management Consulting Services","exchange":"NYSE","state_of_incorporation":"NV","fiscal_year_end":"1231","first_filing_date":"2026-05-13","last_filing_date":"2026-07-02","url":"/sec/cik-0001877939","insider_summary":{"total_transactions":5,"unique_insiders":4,"latest_transaction":"2026-07-01"},"recent_filings":[{"accession_number":"0001877939-26-000089","form_type":"8-K","form_type_family":"current","doc_date":"2026-10-13","title":"8-K — Castellum, Inc. — 2026-10-13","url_slug":"/sec/cik-0001877939/8-k/0001877939-26-000089","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000089-index.html"},{"accession_number":"0001877939-26-000086","form_type":"4","form_type_family":"insider","doc_date":"2026-10-01","title":"4 — Castellum, Inc. — 2026-10-01","url_slug":"/sec/cik-0001877939/4/0001877939-26-000086","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000086-index.html"},{"accession_number":"0001877939-26-000085","form_type":"4","form_type_family":"insider","doc_date":"2026-10-01","title":"4 — Castellum, Inc. — 2026-10-01","url_slug":"/sec/cik-0001877939/4/0001877939-26-000085","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000085-index.html"},{"accession_number":"0001877939-26-000084","form_type":"4","form_type_family":"insider","doc_date":"2026-10-01","title":"4 — Castellum, Inc. — 2026-10-01","url_slug":"/sec/cik-0001877939/4/0001877939-26-000084","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000084-index.html"},{"accession_number":"0001877939-26-000078","form_type":"8-K","form_type_family":"current","doc_date":"2026-09-09","title":"8-K — Castellum, Inc. — 2026-09-09","url_slug":"/sec/cik-0001877939/8-k/0001877939-26-000078","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000078-index.html"},{"accession_number":"0001877939-26-000079","form_type":"4","form_type_family":"insider","doc_date":"2026-09-09","title":"4 — Castellum, Inc. — 2026-09-09","url_slug":"/sec/cik-0001877939/4/0001877939-26-000079","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000079-index.html"},{"accession_number":"0001877939-26-000075","form_type":"8-K","form_type_family":"current","doc_date":"2026-08-31","title":"8-K — Castellum, Inc. — 2026-08-31","url_slug":"/sec/cik-0001877939/8-k/0001877939-26-000075","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000075-index.html"},{"accession_number":"0001877939-26-000073","form_type":"8-K","form_type_family":"current","doc_date":"2026-08-07","title":"8-K — Castellum, Inc. — 2026-08-07","url_slug":"/sec/cik-0001877939/8-k/0001877939-26-000073","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000073-index.html"},{"accession_number":"0001877939-26-000070","form_type":"10-Q","form_type_family":"quarterly","doc_date":"2026-08-06","title":"10-Q — Castellum, Inc. — 2026-08-06","url_slug":"/sec/cik-0001877939/10-q/0001877939-26-000070","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000070-index.html"},{"accession_number":"0001877939-26-000065","form_type":"8-K","form_type_family":"current","doc_date":"2026-07-31","title":"8-K — Castellum, Inc. — 2026-07-31","url_slug":"/sec/cik-0001877939/8-k/0001877939-26-000065","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000065-index.html"},{"accession_number":"0001877939-26-000057","form_type":"8-K","form_type_family":"current","doc_date":"2026-07-02","title":"8-K — Castellum, Inc. — 2026-07-02","url_slug":"/sec/cik-0001877939/8-k/0001877939-26-000057","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000057-index.html"},{"accession_number":"0001877939-26-000061","form_type":"4","form_type_family":"insider","doc_date":"2026-07-02","title":"4 — Castellum, Inc. — 2026-07-02","url_slug":"/sec/cik-0001877939/4/0001877939-26-000061","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000061-index.html"},{"accession_number":"0001877939-26-000060","form_type":"4","form_type_family":"insider","doc_date":"2026-07-02","title":"4 — Castellum, Inc. — 2026-07-02","url_slug":"/sec/cik-0001877939/4/0001877939-26-000060","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000060-index.html"},{"accession_number":"0001877939-26-000058","form_type":"4","form_type_family":"insider","doc_date":"2026-07-02","title":"4 — Castellum, Inc. — 2026-07-02","url_slug":"/sec/cik-0001877939/4/0001877939-26-000058","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000058-index.html"},{"accession_number":"0001877939-26-000052","form_type":"8-K","form_type_family":"current","doc_date":"2026-06-24","title":"8-K — Castellum, Inc. — 2026-06-24","url_slug":"/sec/cik-0001877939/8-k/0001877939-26-000052","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000052-index.html"},{"accession_number":"0001877939-26-000047","form_type":"S-8","form_type_family":"other","doc_date":"2026-06-01","title":"S-8 — Castellum, Inc. — 2026-06-01","url_slug":"/sec/cik-0001877939/s-8/0001877939-26-000047","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000047-index.html"},{"accession_number":"0001877939-26-000044","form_type":"8-K","form_type_family":"current","doc_date":"2026-05-20","title":"8-K — Castellum, Inc. — 2026-05-20","url_slug":"/sec/cik-0001877939/8-k/0001877939-26-000044","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000044-index.html"},{"accession_number":"0001877939-26-000036","form_type":"8-K","form_type_family":"current","doc_date":"2026-05-13","title":"8-K — Castellum, Inc. — 2026-05-13","url_slug":"/sec/cik-0001877939/8-k/0001877939-26-000036","edgar_url":"https://www.sec.gov/Archives/edgar/data/1877939/0001877939-26-000036-index.html"}],"related_endpoints":{"profile":"/sec/CTM/profile","timeline":"/sec/CTM/timeline","peers":"/sec/CTM/peers","insider_pulse":"/sec/CTM/insider-pulse","insider_summary":"/sec/CTM/insider-summary","insider_transactions":"/sec/CTM/insider-transactions","form144":"/sec/CTM/form144","holdings_as_filer":"/sec/CTM/holdings","financial_facts":"/sec/CTM/financial-facts","derivatives":"/sec/CTM/derivatives","officers":"/sec/CTM/officers","insider_network":"/sec/CTM/insider-network","risk_flags":"/sec/CTM/risk-flags","filings":"/sec/CTM/filings","cross_topic_dossier":"/api/v1/dossier?ticker=CTM"}}