# `POST /ownership/institutional-holdings/managers`

**Purpose:** Find 13F managers by name or CIK: managers whose latest name starts with `query` (under 3 characters) or contains it (3 characters or more), case-insensitive, and, when `query` is all digits, the manager with that CIK. Up to 8, largest latest portfolio first.

**Request:**

| Field | Type | Default | Notes |
|---|---|---|---|
| `query` | string | — | **Required.** 1–64 characters. A blank `query` returns no managers and is not charged. |

**Response:** `managers` (up to 8 of `{cik, name, latest_quarter, latest_total_value}`; `latest_quarter` is the `YYYYQn` label of the manager's latest quarter, or `null`) and `credits_used`.

**Credits:** **10.**

**Errors:** `422 VALIDATION_ERROR`, `402 CREDITS_INSUFFICIENT`.

**Example Request:**

```json
{
  "query": "berkshire"
}
```

**Example Response:**

```json
{
  "managers": [
    {"cik": "1067983", "name": "BERKSHIRE HATHAWAY INC", "latest_quarter": "2025Q4", "latest_total_value": 274160000000.0}
  ],
  "credits_used": 10
}
```