---
title: "S-1 dilution filings tracker: answers \"which companies are registering new share"
method: GET
path: "/v1/dilution"
---

# S-1 dilution filings tracker: answers "which companies are registering new share

`GET /v1/dilution`

## Request

- Base URL: `https://api.alphanume.com`
- URL: `https://api.alphanume.com/v1/dilution`
- Auth: one of:
  - API key in header `X-API-Key`
  - HTTP bearer

S-1 dilution filings tracker: answers "which companies are registering new share
supply, and where is each registration in its lifecycle?" One row per S-1
registration event: ticker, company name, filing timestamp, market cap at filing,
whether the filing is dilutive and/or a resale, shares offered, whether/when it
became effective (with days-to-effective), whether/when it was withdrawn, and the
SEC accession number + filing URL for the source document.

Use it to flag dilution overhang on small caps, track time-to-effectiveness, or
build event studies around registration filings. Filters by ticker and filing-date
range (no exact-date parameter on this dataset).

Requires an Alphanume Pro API key. A 403 PRO_SUBSCRIPTION_REQUIRED or
DATE_RANGE_RESTRICTED error means the key's plan does not cover the request --
it does not mean the data is missing.

## Query parameters

- `ticker` string
- `date_gte` string
- `date_lte` string
- `date_gt` string
- `date_lt` string

## Response `200`

Matching rows.

- Envelope
  - `count` integer, required
  - `data` object[], required

## Other responses

- `400`: Invalid or conflicting query parameters.
- `401`: Missing or unrecognized API key.
- `403`: PRO_SUBSCRIPTION_REQUIRED: the key's plan does not include API access; every endpoint requires an active Pro subscription. DATE_RANGE_RESTRICTED: a legacy free-tier key asked for dates outside its window. In both cases the data is not missing.
- `429`: Rate limit exceeded (600/min); the body carries retry_after_seconds.

---

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