AnswerPool

13F Holders API: List institutional holders of one issuer from the latest 13F period — SEC Form 13F

List institutional holders of one issuer from the latest 13F period — manager, value, shares and put/call, ranked by position size. Query by as-filed issuer name or CUSIP; joins by name/CIK only (no identifier mapping).

$0.02 per call — pay with prepaid card credits (Authorization: Bearer ck_live_…, packs from $1) or with USDC over x402: call it, get 402 with the price, retry signed. Failed calls are never charged.

How do you call it?

GET /v1/sec/13f/holders — product id sec_13f_holders. Over MCP, call answerpool_get with product_id=sec_13f_holders.

curl "https://answerpool.io/v1/sec/13f/holders?issuer=NVIDIA"

# with a prepaid credit key
curl -H "Authorization: Bearer ck_live_..." "https://answerpool.io/v1/sec/13f/holders?issuer=NVIDIA"

Live call: https://answerpool.io/v1/sec/13f/holders?issuer=NVIDIA · JSON sample: /v1/samples/sec_13f_holders

What does the answer look like?

A representative response, the same static sample served at /v1/samples/sec_13f_holders.

as_of2026-08-31T17:00:00Z
periods_held2025-12-31, 2025-09-30
period2025-12-31
count1
refresh_after2026-09-17T11:15:00.000Z

holders

manager_cikmanager_namevalue_usdsharesput_callissuercusipaccession
0001566307Ramiah Investment Group5000004000—NVIDIA CORP67066G1040001566307-26-000071
The same sample as raw JSON
{
 "as_of": "2026-08-31T17:00:00Z",
 "periods_held": [
  "2025-12-31",
  "2025-09-30"
 ],
 "period": "2025-12-31",
 "count": 1,
 "holders": [
  {
   "manager_cik": "0001566307",
   "manager_name": "Ramiah Investment Group",
   "value_usd": 500000,
   "shares": 4000,
   "put_call": null,
   "issuer": "NVIDIA CORP",
   "cusip": "67066G104",
   "accession": "0001566307-26-000071"
  }
 ],
 "refresh_after": "2026-09-17T11:15:00.000Z"
}

How fresh is it, and where does the data come from?

The fastest source behind this answer can change every 15 minutes, so every response carries a refresh_after timestamp — right now it would be 2026-09-17T11:15:00.000Z. Schedule the next call on that value rather than on a guess.

Method version 0.1.0 · serving cache 1 day · every response carries a result_id you can resolve at /v1/provenance.

When should you use it?

Ownership questions per issuer.

What you skip building

When should you not use it?

Real-time ownership — quarterly with a lag; sub-5% retail holders never appear.

Where else can you find this?