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Particle API maps companies across multiple identifier systems — SEC CIK numbers, Wikidata QIDs, stock tickers, domains, and knowledge graph entities. Every company includes a structured product hierarchy showing business segments, product lines, and individual products with lifecycle tracking. Use any identifier you already have to find a company, then explore its full profile.

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What you can build

  • Company databases — Build comprehensive profiles using cross-referenced identifiers from SEC, Wikidata, and the knowledge graph
  • Competitive analysis — Map product portfolios and track lifecycle changes across launches and discontinuations
  • SEC research — Look up companies by CIK number for regulatory filing workflows
  • Entity resolution — Bridge between ticker symbols, domains, and knowledge graph entities in a single query
  • Product tracking — Monitor when companies announce, launch, or discontinue products

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Key concepts

Companies

Search by name, ticker, domain, CIK, or knowledge graph entity.

Products

Hierarchical product trees with lifecycle status tracking.

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Resource hierarchy

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List companies

curl "https://api.particle.pro/v1/companies?limit=3" \
  -H "X-API-Key: YOUR_API_KEY"

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Response schema

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data
Company[]
required
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has_more
boolean
required
Whether more results exist beyond this page.
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cursor
string
Pass to the next request for the next page.
Example response
{
  "data": [
    {
      "id": "5rKmNxW8pYvQ",
      "name": "Apple Inc.",
      "description": "American multinational technology company",
      "updated_at": "2026-03-04T09:15:00Z",
      "identifiers": {
        "cik": "0000320193",
        "qid": "Q312",
        "entity_id": "Lm0wOWM3dzA",
        "ticker": "AAPL",
        "domain": "apple.com"
      }
    }
  ],
  "has_more": true,
  "cursor": "r.4mGKaJ"
}

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Filtering

Combine any of these query parameters:
ParameterDescriptionExample
qSearch by company name (case-insensitive partial match)?q=Apple
tickerFilter by stock ticker symbol(s), up to 100?ticker=AAPL&ticker=GOOG
domainFilter by company domain(s), up to 100?domain=apple.com
cikFilter by SEC CIK(s), up to 100?cik=0000320193
qidFilter by Wikidata QID(s), up to 100?qid=Q312
entity_idFilter by knowledge graph entity ID(s), up to 100?entity_id=Lm0wOWM3dzA
updated_afterOnly companies updated after this ISO 8601 timestamp?updated_after=2026-01-01T00:00:00Z

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Find by ticker

curl "https://api.particle.pro/v1/companies?ticker=AAPL" \
  -H "X-API-Key: YOUR_API_KEY"

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Search by name

curl "https://api.particle.pro/v1/companies?q=Micro&limit=5" \
  -H "X-API-Key: YOUR_API_KEY"
Returns companies with “Micro” in their name — Microsoft, Micron, etc.

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Incremental sync

Use updated_after to poll for changes since your last sync: 
curl "https://api.particle.pro/v1/companies?updated_after=2026-03-01T00:00:00Z" \
  -H "X-API-Key: YOUR_API_KEY"

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Get a single company

curl "https://api.particle.pro/v1/companies/5rKmNxW8pYvQ" \
  -H "X-API-Key: YOUR_API_KEY"
Returns the same company schema without the pagination wrapper.

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Next steps

Products

Explore a company’s product hierarchy — segments, product lines, and individual products.

Entities

Use entity_id to cross-reference companies with podcast appearances and other content.