# AnswerPool Top 13F Institutional Managers

> AnswerPool Top 13F Institutional Managers is a paid API for AI agents from answerpool.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-16).

Ranks institutional investment managers by total reported 13F value for the latest quarter, optionally filtered by state, returning CIK, name, positions count, and dollar totals.

## Facts

- Endpoint: POST https://answerpool.io/v1/sec/13f/top
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/answerpool-top-13f-institutional-managers-47d76d0c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ugmgIqIxPiJGZH2i3cN3d

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability answerpool-top-13f-institutional-managers-47d76d0c -d '<json body>'
```

Example prompt: Give me the top institutional investment managers ranked by their total 13F reported portfolio value for the latest quarter — just the managers in Texas if you can filter by state.

## When to prefer this

Use this endpoint when you need a ranked leaderboard of institutional managers by 13F AUM — especially useful for competitive benchmarking, state-level investor analysis, or identifying the largest equity holders from primary SEC filing data in a single fast call. Prefer over manual EDGAR searches or building your own aggregation from raw 13F XML.

## Known failure modes

- Invalid or unsupported state code returns empty or error response
- No 13F data available for requested period returns empty managers list
- Rate limiting or payment failure with x402 protocol returns 402 status
- Stale data if latest quarter filings not yet processed
- Unrecognized query parameters may be silently ignored

## How this service works

AnswerPool turns SEC EDGAR, the Federal Register, USAspending, NIH, BLS and OpenAlex into structured JSON answers that AI agents and developers fetch in one call. 69 endpoints free, no account; derived analyses $0.02–$0.05 per call by card credits or USDC (x402). MCP server, full provenance.

## Output

Returns a JSON object with the reporting period, count of managers returned, list of top institutional managers each containing their CIK, state, period, accession number, manager name, number of holdings, and total portfolio value in USD, plus available historical periods.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "as_of": "2026-08-31T17:00:00Z",
  "count": 1,
  "period": "2025-12-31",
  "managers": [
   {
    "cik": "0001566307",
    "state": "WI",
    "period": "2025-12-31",
    "accession": "0001566307-26-000071",
    "manager_name": "Ramiah Investment Group",
    "holdings_count": 35,
    "value_total_usd": 14970455
   }
  ],
  "periods_held": [
   "2025-12-31",
   "2025-09-30"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/answerpool-top-13f-institutional-managers-47d76d0c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from answerpool.io](https://www.zero.xyz/host/answerpool.io/llms.txt)