Washington State Campaign Finance Report History

Washington State's Public Disclosure Commission provides a list of all campaign finance reports, including C3, C4, C5, C6, and LMC forms, filed over the last 10 years. The dataset tracks report amendments and filing history for candidates and political committees, with the reporting period determined by election year or calendar year. It is intended for examining reporting timelines and amendment sequences.

Use Cases

• Track the amendment history of C3, C4, C5, C6, and LMC reports to identify superseded filings for a specific filer.
• Analyze reporting timelines for political committees by examining the calendar year of their reporting periods.
• Examine candidate filing patterns by correlating reports with the year of their election, not the filing date.
• Build a compliance monitoring tool to flag missing reports based on the 10-year history of required filings.

Strengths

• Covers a 10-year history of campaign finance reports, providing longitudinal data.
• Includes multiple report types (C3, C4, C5, C6, LMC) and tracks amendments.
• Sourced from the authoritative Washington State Public Disclosure Commission (PDC).

Limitations

• The dataset may contain incomplete or incorrect information as noted by the PDC's best-effort disclaimer.
• Does not contain the actual financial values from the reports, requiring joins with other datasets.
• Legal definitions and verification require consulting external statutes (RCW 42.17A, WAC Title 390).

Provenance

Source

Washington State Public Disclosure Commission (PDC).

Collection Method

Collected as part of the PDC's statutory campaign finance disclosure requirements.

Time Range

Last 10 years (coverage determined by election year for candidates, calendar year for committees).

Freshness

Updated as of March 22, 2026.

Geography

Washington State, USA.