Ryufin research

Open data

The tables behind our studies, built from what companies file with the SEC. Free to use, share and adapt under CC BY 4.0: credit Ryufin and link the study the data comes from.

  • Share of US-listed companies held by the 300 largest US ETFs, 2026

    For each company: the share of its shares held by the 300 largest US-listed ETFs, the number of funds holding it, the dollars, the biggest stake and the Vanguard and big-three shares, from the funds' Form N-PORT filings.

    2,598 companies · JSON · CC BY 4.0 · the study

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  • Restatements, late filings, auditor changes and impairments, three years to 2026

    The latest date of each SEC filing flag per company: 8-K item 4.02 restatements, NT 10-K and NT 10-Q late filings, 8-K item 4.01 auditor changes and 8-K item 2.06 impairments.

    2,832 companies · JSON · CC BY 4.0 · the study

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  • Five-year change in share counts, 2026

    Diluted weighted-average shares, split-adjusted, in the latest fiscal year and five years before, with the change, for US-GAAP filers worth $2B or more.

    1,276 companies · JSON · CC BY 4.0 · the study

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  • Effective tax rates of US companies, three fiscal years to 2026

    Income tax expense over pretax income over three fiscal years, with the current (non-deferred) rate, for profitable US-GAAP filers worth $2B or more; REITs and partnerships left out.

    1,168 companies · JSON · CC BY 4.0 · the study

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  • Where the cash went, 2026

    Each company's latest fiscal year of operating cash flow, capital spending, dividends and buybacks, from its SEC cash flow statement. Non-financial US-listed companies worth $2B or more.

    1,173 companies · JSON · CC BY 4.0 · the study

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  • Insider buying and selling, twelve months to October 2026

    Open-market purchases and sales by directors, officers and 10% owners from Form 4 filings, with the number of buyers and sellers and the share of selling under 10b5-1 plans.

    1,713 companies · JSON · CC BY 4.0 · the study

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  • Earnings-day stock moves, 2023 to 2026

    The two-day price move around each of a company's last twelve earnings releases (8-K item 2.02), its ordinary two-day move, the ratio of the two and how often the price rose.

    1,536 companies, 17,998 reports · JSON · CC BY 4.0 · the study

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  • Major customers of US-listed companies, 2026

    Every customer behind 10% or more of revenue that a company discloses in its latest 10-K, 20-F or 40-F, with the share of revenue and a link to the filing.

    3,049 annual reports · CSV · CC BY 4.0 · the study

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Programs and assistants can also query company data directly through the Ryufin MCP server.