{"cik":"0001662579","ticker":"CCCC","name":"C4 Therapeutics, Inc.","sic_code":"2836","sic_description":"Biological Products, (No Diagnostic Substances)","exchange":"Nasdaq","state_of_incorporation":"DE","fiscal_year_end":"1231","first_filing_date":"2026-05-12","last_filing_date":"2026-08-11","url":"/sec/cik-0001662579","insider_summary":{"total_transactions":14,"unique_insiders":9,"latest_transaction":"2026-07-10"},"recent_filings":[{"accession_number":"0001470831-26-000925","form_type":"4","form_type_family":"insider","doc_date":"2026-10-02","title":"4 — C4 Therapeutics, Inc. — 2026-10-02","url_slug":"/sec/cik-0001662579/4/0001470831-26-000925","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000925-index.html"},{"accession_number":"0001470831-26-000924","form_type":"4","form_type_family":"insider","doc_date":"2026-10-02","title":"4 — C4 Therapeutics, Inc. — 2026-10-02","url_slug":"/sec/cik-0001662579/4/0001470831-26-000924","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000924-index.html"},{"accession_number":"0001628280-26-063497","form_type":"8-K","form_type_family":"current","doc_date":"2026-09-25","title":"8-K — C4 Therapeutics, Inc. — 2026-09-25","url_slug":"/sec/cik-0001662579/8-k/0001628280-26-063497","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001628280-26-063497-index.html"},{"accession_number":"0001470831-26-000895","form_type":"4","form_type_family":"insider","doc_date":"2026-09-21","title":"4 — C4 Therapeutics, Inc. — 2026-09-21","url_slug":"/sec/cik-0001662579/4/0001470831-26-000895","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000895-index.html"},{"accession_number":"0002050709-26-000022","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-14","title":"SCHEDULE 13G/A — C4 Therapeutics, Inc. — 2026-08-14","url_slug":"/sec/cik-0001662579/schedule-13g-a/0002050709-26-000022","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0002050709-26-000022-index.html"},{"accession_number":"0000902664-26-003524","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-14","title":"SCHEDULE 13G/A — C4 Therapeutics, Inc. — 2026-08-14","url_slug":"/sec/cik-0001662579/schedule-13g-a/0000902664-26-003524","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0000902664-26-003524-index.html"},{"accession_number":"0001950047-26-008193","form_type":"144","form_type_family":"other","doc_date":"2026-08-14","title":"144 — C4 Therapeutics, Inc. — 2026-08-14","url_slug":"/sec/cik-0001662579/144/0001950047-26-008193","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001950047-26-008193-index.html"},{"accession_number":"0001950047-26-008065","form_type":"144","form_type_family":"other","doc_date":"2026-08-13","title":"144 — C4 Therapeutics, Inc. — 2026-08-13","url_slug":"/sec/cik-0001662579/144/0001950047-26-008065","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001950047-26-008065-index.html"},{"accession_number":"0000895421-26-000231","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-12","title":"SCHEDULE 13G/A — C4 Therapeutics, Inc. — 2026-08-12","url_slug":"/sec/cik-0001662579/schedule-13g-a/0000895421-26-000231","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0000895421-26-000231-index.html"},{"accession_number":"0001950047-26-008039","form_type":"144","form_type_family":"other","doc_date":"2026-08-12","title":"144 — C4 Therapeutics, Inc. — 2026-08-12","url_slug":"/sec/cik-0001662579/144/0001950047-26-008039","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001950047-26-008039-index.html"},{"accession_number":"0001628280-26-055490","form_type":"8-K","form_type_family":"current","doc_date":"2026-08-11","title":"8-K — C4 Therapeutics, Inc. — 2026-08-11","url_slug":"/sec/cik-0001662579/8-k/0001628280-26-055490","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001628280-26-055490-index.html"},{"accession_number":"0001628280-26-055494","form_type":"10-Q","form_type_family":"quarterly","doc_date":"2026-08-11","title":"10-Q — C4 Therapeutics, Inc. — 2026-08-11","url_slug":"/sec/cik-0001662579/10-q/0001628280-26-055494","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001628280-26-055494-index.html"},{"accession_number":"0002012383-26-002217","form_type":"SCHEDULE 13G","form_type_family":"other","doc_date":"2026-07-27","title":"SCHEDULE 13G — C4 Therapeutics, Inc. — 2026-07-27","url_slug":"/sec/cik-0001662579/schedule-13g/0002012383-26-002217","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0002012383-26-002217-index.html"},{"accession_number":"0001470831-26-000689","form_type":"4","form_type_family":"insider","doc_date":"2026-07-02","title":"4 — C4 Therapeutics, Inc. — 2026-07-02","url_slug":"/sec/cik-0001662579/4/0001470831-26-000689","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000689-index.html"},{"accession_number":"0001470831-26-000688","form_type":"4","form_type_family":"insider","doc_date":"2026-07-02","title":"4 — C4 Therapeutics, Inc. — 2026-07-02","url_slug":"/sec/cik-0001662579/4/0001470831-26-000688","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000688-index.html"},{"accession_number":"0001470831-26-000667","form_type":"4","form_type_family":"insider","doc_date":"2026-06-26","title":"4 — C4 Therapeutics, Inc. — 2026-06-26","url_slug":"/sec/cik-0001662579/4/0001470831-26-000667","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000667-index.html"},{"accession_number":"0001470831-26-000665","form_type":"4","form_type_family":"insider","doc_date":"2026-06-26","title":"4 — C4 Therapeutics, Inc. — 2026-06-26","url_slug":"/sec/cik-0001662579/4/0001470831-26-000665","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000665-index.html"},{"accession_number":"0001470831-26-000663","form_type":"4","form_type_family":"insider","doc_date":"2026-06-26","title":"4 — C4 Therapeutics, Inc. — 2026-06-26","url_slug":"/sec/cik-0001662579/4/0001470831-26-000663","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000663-index.html"},{"accession_number":"0001470831-26-000661","form_type":"4","form_type_family":"insider","doc_date":"2026-06-26","title":"4 — C4 Therapeutics, Inc. — 2026-06-26","url_slug":"/sec/cik-0001662579/4/0001470831-26-000661","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000661-index.html"},{"accession_number":"0001470831-26-000659","form_type":"4","form_type_family":"insider","doc_date":"2026-06-26","title":"4 — C4 Therapeutics, Inc. — 2026-06-26","url_slug":"/sec/cik-0001662579/4/0001470831-26-000659","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000659-index.html"},{"accession_number":"0001470831-26-000657","form_type":"4","form_type_family":"insider","doc_date":"2026-06-26","title":"4 — C4 Therapeutics, Inc. — 2026-06-26","url_slug":"/sec/cik-0001662579/4/0001470831-26-000657","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000657-index.html"},{"accession_number":"0001628280-26-045194","form_type":"8-K","form_type_family":"current","doc_date":"2026-06-24","title":"8-K — C4 Therapeutics, Inc. — 2026-06-24","url_slug":"/sec/cik-0001662579/8-k/0001628280-26-045194","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001628280-26-045194-index.html"},{"accession_number":"0001628280-26-042365","form_type":"8-K","form_type_family":"current","doc_date":"2026-06-11","title":"8-K — C4 Therapeutics, Inc. — 2026-06-11","url_slug":"/sec/cik-0001662579/8-k/0001628280-26-042365","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001628280-26-042365-index.html"},{"accession_number":"0001470831-26-000504","form_type":"4","form_type_family":"insider","doc_date":"2026-06-04","title":"4 — C4 Therapeutics, Inc. — 2026-06-04","url_slug":"/sec/cik-0001662579/4/0001470831-26-000504","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0001470831-26-000504-index.html"},{"accession_number":"0002050709-26-000018","form_type":"SCHEDULE 13G","form_type_family":"other","doc_date":"2026-05-19","title":"SCHEDULE 13G — C4 Therapeutics, Inc. — 2026-05-19","url_slug":"/sec/cik-0001662579/schedule-13g/0002050709-26-000018","edgar_url":"https://www.sec.gov/Archives/edgar/data/1662579/0002050709-26-000018-index.html"}],"related_endpoints":{"profile":"/sec/CCCC/profile","timeline":"/sec/CCCC/timeline","peers":"/sec/CCCC/peers","insider_pulse":"/sec/CCCC/insider-pulse","insider_summary":"/sec/CCCC/insider-summary","insider_transactions":"/sec/CCCC/insider-transactions","form144":"/sec/CCCC/form144","holdings_as_filer":"/sec/CCCC/holdings","financial_facts":"/sec/CCCC/financial-facts","derivatives":"/sec/CCCC/derivatives","officers":"/sec/CCCC/officers","insider_network":"/sec/CCCC/insider-network","risk_flags":"/sec/CCCC/risk-flags","filings":"/sec/CCCC/filings","cross_topic_dossier":"/api/v1/dossier?ticker=CCCC"}}