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Dataset catalog

Explore 23 datasets from SEC filings, congressional disclosures and official releases. Each catalog entry lists its source, coverage, update cadence, access and available interfaces.

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1.8B+ rows under management and 409 GiB of structured data (all tables, one copy, including intermediate tables; uncompressed) · 410M+ rows in the serving tables (per replica, including projections) · measured 2026-09-25

13F since Q2 2013 · Form 4 since 2006 · Congress since 2014 · FTD since 2017 · counts measured Sep 24, 2026 · How the data is built

23 datasets: 22 available, 1 in development

Ownership and insiders

Who owns what, and who is buying or selling their own stock, from SEC ownership filings.

6

Corporate and governance

Buybacks, fundamentals, large beneficial ownership stakes and executive pay.

4

Market structure and government

Congressional trades, settlement failures and Reg SHO threshold lists.

4

Macro and economic

Rates, the curve, the Fed balance sheet, inflation, positioning, banks and energy.

9

Row counts as of Sep 24, 2026, measured in production: a dated snapshot, not live totals. Coverage start dates measured Jun 3, 2026; open-ended windows run to the latest release. Live samples are real responses from https://api.ko.io. Signed-out requests use the keyless demo, which covers Free-plan endpoints only.

How the data is built

Each dataset is parsed from a public filing or release, normalized, and tested before it is published.

  1. Source
    EDGAR filing
    The original SEC document
  2. Identifier
    Form, period, filer
    Which filing a row came from
  3. Structure
    Parsed row
    Normalized, linked fields
  4. Delivery
    Web · REST · MCP
    Same row everywhere
Data is normalized from the filings; lookup endpoints locate the source documents.
Source-traced
SEC datasets are parsed from public EDGAR filings. 13F, Form 4 and similar rows don't carry accession numbers; the filings endpoints return each filer's source documents. Reported values and calculated measures are labeled separately.
Normalized
Share classes (GOOGL + GOOG) are consolidated, and a manager's linked filing entities are combined into one continuous portfolio where the mapping exists.
13F publication checks
400+ automated data tests are defined across the datasets. For 13F serving tables a failed test blocks the publish, so the API keeps serving the last good version; 13F holdings are also reconciled to each filing's cover totals.
One source of truth
The Terminal, the REST API and the MCP server read the same tables, so a number matches wherever you see it.

Query it yourself

Every available dataset has a REST endpoint; most have an MCP tool. Start on the Free plan.

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