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13F Institutional Holdings provides quarterly equity positions reported by US institutional investment managers on SEC Form 13F. Each observation is associated with a filing manager, a held security, and a report period ending on a calendar quarter end. Holdings are available by manager and by security through the FocusAlpha API and MCP.
Plan: Professional and above · Credits: 1 per call

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What You Can Use 13F Holdings For

Reconstruct a manager’s disclosed equity portfolio for a quarter, and difference two quarters to see what it bought and sold. List every institution holding a given company, ranked by position value. Measure how concentrated a manager’s book is. Compare what a manager says it does in its Form ADV brochure against what its 13F book actually holds.

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13F Holdings Coverage

Coverage is US Form 13F filers: institutional investment managers exercising discretion over more than $100 million in 13F-reportable US-listed equities. Managers below that threshold do not file and are absent. Up to eight quarters of history are served per manager.
A 13F is a partial picture of a manager by law, not by omission. It reports long positions in 13F-reportable securities only. Short positions, bonds, cash, commodities, non-US listings and most derivatives are not reportable and therefore never appear. A portfolio reconstructed from 13F data is the reportable slice, not the fund.

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Two Ways to Read 13F Holdings

The dataset is queried in one of two mutually exclusive modes, and exactly one identifier must be supplied. Passing filer_cik returns one manager’s whole portfolio. This is the mode for “what does this manager own”. Passing ticker returns every institution holding that security, largest position first. This is the mode for “who owns this company”. Passing both, or neither, returns a 400.
Querying by filer_cik with no report period returns only the most recent quarter, not the manager’s history. To read history, pass report_period for one quarter or report_period_gte and report_period_lte for a range. The same applies to ticker mode: bounds are what produce a holder history across quarters.

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Key 13F Holdings Fields

ticker, name_of_issuer and cusip identify the held security as the manager reported it. title_of_class is the share class. put_call is populated on option positions and null on ordinary long stock. report_period is the quarter end the position is as of. filing_date is when the manager filed. form_type distinguishes an original 13F-HR from an amendment. accession_number identifies the filing on EDGAR.

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13F Holdings Date Convention

report_period is the quarter end the positions are stated as of — always a calendar quarter end such as 2026-03-31. It is the date to filter and group on. filing_date is when the manager submitted the form, and it is typically about 45 days after the report period. The gap matters: a position dated 31 March only becomes public in mid-May, so 13F data is never a current picture of a portfolio.

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13F Holdings Sources

Positions are read from the managers’ own Form 13F filings on SEC EDGAR. Nothing is estimated, and an amendment is kept as its own filing rather than overwriting the original.

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Query 13F Holdings

Use the institutional holdings endpoint to retrieve 13F positions. Supply exactly one of filer_cik or ticker to choose the mode.
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string
The manager’s SEC CIK. Returns that manager’s portfolio. Exactly one of filer_cik or ticker is required.
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string
The held security’s ticker. Returns every institution holding it. Exactly one of filer_cik or ticker is required.
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string
Exact quarter end, YYYY-MM-DD, for example 2026-03-31. Required to read anything other than the most recent quarter.
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string
Quarter-end lower bound, inclusive. report_period_lte, report_period_gt and report_period_lt work the same way.
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integer
default:"1000"
Maximum rows in the response. There is no hard cap. This bounds the whole response, not the rows per quarter, so a multi-quarter request needs a much larger value than a single-quarter one — around 5,000 for a complete eight-quarter holder history on a mega-cap. Leaving it at the default silently truncates such a request to the most recent quarters.
These routes return a bare wrapper key rather than the standard envelope, use limit-only paging, and return the flat { error, message } error body. See Pagination and Errors. See also Form ADV Adviser Directory for who these managers are, Form ADV Part 2A Brochure Data for what they say they do, Adviser Screening to find managers whose declared style disagrees with their book, Insider Trades for transactions by company officers, and Proxy Ownership for beneficial ownership as the company reports it.