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Daily Market Cap provides the daily market capitalisation series for a listed security. Each observation is one symbol on one date, in that listing’s own currency. It is served by the same endpoint as daily prices, selected with series=market_cap, and rows are returned newest date first.
Plan: Professional and above · Credits: 1 per call

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What You Can Use Daily Market Cap For

Track how a company’s size changed over time. Distinguish a stock split from a real decline: a split halves the price but leaves market cap unchanged, so market cap is the reliable check. Build size bands for a universe on a given date.

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Daily Market Cap Coverage

History starts 2025-07-14 — about one year, the same window as daily prices. There is nothing before that date.

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One Row Per Symbol Per Date

Like prices, a company with more than one listing returns one row per symbol per date, each naming its symbol. Choose the listing you mean.

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Daily Market Cap Currency

Values are in the row’s own currency and are not converted to US dollars. Note the asymmetry with the company registry, where the profile’s market_cap is denominated in market_cap_currency rather than in the listing’s price currency — for London names, GBP against a GBp price. To compare sizes across countries, use Company Screening, which converts to US dollars.

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Daily Market Cap Sources

Market cap is a vendor-supplied daily figure for the listing.

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Query Daily Market Cap

Use the market data endpoint with series=market_cap.
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string
required
A ticker with its market suffix for non-US listings, a company_id, a CIK or an ISIN.
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string
required
Set to market_cap for this dataset.
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string
Earliest date, YYYY-MM-DD. date_lte sets the ceiling.
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integer
default:"100"
Rows per page, between 1 and 1000. Page through with cursor.
See also Daily Prices, Corporate Events for splits, Company Screening for USD-converted size filters, and Financial Metrics for valuation ratios.