What it returns
The reverse of a 13F lookup: give a CUSIP or issuer name and get every institutional manager that reported it on Form 13F-HR for a quarter. The source is the SEC's official Form 13F data sets.
Per manager and position: manager name and CIK, shares, value in USD, put/call, share type, filing date, form (13F-HR or 13F-HR/A), accession number, and each holder's share of all reported shares. Turn on `includeChange` for previous-quarter shares, share change and a new-position flag.
Common uses
Institutional ownership and crowding for any stock. New and exited positions quarter over quarter. Put and call holders by fund.
Request
POST https://api.pushbuild.com/sec-13f-holders/run with a JSON body. Send your key in the X-API-Key header.
| Field | Type | Description |
|---|---|---|
cusips | list of strings | Nine-character CUSIPs, e.g. 037833100 (Apple). |
issuerName | string | Alternative to CUSIPs, e.g. GAMESTOP. Matches the issuer name as filed. |
period | string | YYYY-MM-DD quarter end (e.g. 2026-06-30), or 'latest'. Default: "latest". |
positionType | string: all, shares, options | Filter by put/call. Default: "all". |
includeChange | boolean | Adds previous shares, share change and a new-position flag. Slower. Default: false. |
minValueUsd | integer | Only positions worth at least this much. |
sortBy | string: value, shares, change, manager | Sort order. Default: "value". |
maxItems | integer | Maximum items to return (1-500). Default: 100. |
Example
curl -X POST https://api.pushbuild.com/sec-13f-holders/run \
-H "X-API-Key: YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{"cusips": ["037833100"], "maxItems": 20}'Response
{"count": 20, "truncated": false, "seconds": 1.4, "items": [ { ... } ]}Each call returns up to 500 items. Records that fail validation or are not found are flagged in the items and not charged.
Pricing
Pay only for results returned: $0.24 per 1,000 holders. No charge for errors or empty searches.
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