> ## Documentation Index
> Fetch the complete documentation index at: https://docs.topograph.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Connecticut (US)

> Country-specific identifiers, data sources, and implementation details for the State of Connecticut.

<Warning>
  This guide is outdated and will be removed on 1 November 2026. The up-to-date Connecticut (US) reference is on the [Connecticut (US) country page](https://www.topograph.co/countries/us-ct).
</Warning>

## Table of Contents

* [Data Sources](#data-sources)
* [Company Identifiers](#company-identifiers)
* [Search Capabilities](#search-capabilities)
* [Data Availability](#data-availability)
* [Quirks & Gotchas](#quirks--gotchas)
* [Example API Responses](#example-api-responses)

## Data Sources

Connecticut is served from two independent channels published by the **Connecticut Secretary of the State**.

* **Open data**, refreshed nightly. Covers every domestic and foreign entity registered with the state: stock and non-stock corporations, limited liability companies, limited partnerships, limited liability partnerships, statutory trusts, and chartered variants. Includes the entity record, principals (officers, directors, members, managers, partners), statutory registered agent, filing history, and previous names. Drives the prefill profile and the search index.
* **Public business records search** at <a href="https://service.ct.gov/business/s/onlinebusinesssearch">service.ct.gov/business</a>. The authoritative live face of the register. Drives the verification profile and the Trade Register Extract.

The two channels are wired into two independent profile blocks. Topograph does not merge attributes across them.

## Company Identifiers

The primary identifier is the **seven-digit account number** assigned by the Connecticut Secretary of the State. Leading zeros are part of the number (`0668349`, `3453337`). It is exposed in two forms: the bare number, and that same number carrying its register prefix, the **Administrative Legal Entity Identifier (ALEI)**:

* **Composite form**: `US-CT.BER:0668349` (the form shown on the Business Records Search portal, returned as `identifiers.alei`).
* **Bare form**: `0668349` (the seven-digit account number, returned as `company.id` and `identifiers.accountNumber`).

Both forms resolve to the same entity. The API accepts either as the `id` parameter and as the search query, and also accepts the number without its leading zeros (`668349`).

### Legal Entity Identifier (LEI)

GLEIF is the supplementary data source for this identifier.

`company.identifiers.lei` is returned when `accountNumber` has a unique match against Connecticut registration or validation references in GLEIF.

The LEI is a separate global identifier from Connecticut's ALEI (`company.identifiers.alei`).

An [LEI (Legal Entity Identifier)](https://www.gleif.org/en/about-lei/introducing-the-legal-entity-identifier-lei) has 20 uppercase letters and digits, ending in two check digits.

Coverage varies by entity. The field is omitted when no unambiguous match is available. Lapsed or retired LEIs may be returned; annulled records are excluded.

## Search Capabilities

Search by name and search by account number are both supported; the composite ALEI is accepted as a search query too. Previous names recorded against the entity are indexed so legacy names continue to match.

### Active companies only

Search can return companies that are no longer active. Each result carries the register's status, so [`activeOnly=true`](/essentials/search#active-companies-only) removes the inactive ones.

## Data Availability

| Datapoint | Prefill | Verification |
| - | - | - |
| `company` | ✅ | ✅ (no legal form, no NAICS) |
| `legalRepresentatives` | ✅ | ✅ (top 3 principals) |
| `otherKeyPersons` (agent) | ✅ | ✅ |
| `activityCodes` (NAICS) | ✅ | ❌ (prefill only) |
| `tradeRegisterExtract` | ✅ | ✅ |
| `shareholders` | ❌ | ❌ |
| `ultimateBeneficialOwners` | ❌ | ❌ |
| Certified documents | ❌ | ❌ |

The two modes return slightly different field sets. The prefill profile is the richer of the two: it includes the legal form, NAICS classification, and the full principal list from the nightly open data. The verification profile is read live from the public business records search and returns the name, status, principal address, top three principals, and the statutory registered agent. Use the prefill mode when you need the richer field set and can tolerate up to a day of staleness; use verification when you need the authoritative live state of the register.

The Trade Register Extract is a printable PDF of the live entity card, bundled with the company-data block at no extra charge.

Shareholder lists are not collected by the Connecticut Secretary of the State for any entity type. Connecticut maintains no state-level beneficial-ownership register.

## Quirks & Gotchas

### One identifier, two public forms

The composite `US-CT.BER:0668349` and the bare `0668349` are accepted interchangeably by the API. Topograph normalises both forms and returns the bare account number as `company.id`; the composite is always available under `identifiers.alei`.

### Status vocabulary

Twenty distinct status values appear across the register. Only `Active` indicates an entity in good standing. Every other label (`Forfeited`, `Dissolved`, `Withdrawn`, `Revoked`, `Cancelled`, `Merged`, and others) marks an entity that is no longer transacting business in Connecticut.

### Connecticut publishes principals, including LLC members

Unlike many US states that hide LLC membership, Connecticut publishes officers, directors, members, managers, and partners for every entity type. Where a principal holds more than one role, Topograph emits a separate `legalRepresentatives` record per role.

### NAICS classification is included

Each entity carries an NAICS classification on the formation survey. Both the six-digit code and the descriptive label are returned under `company.activities.NAICS`.

**Main activity:** the register publishes exactly one NAICS code per entity, so it is by definition the company's main activity. The NAICS entry carries `isMainActivity: true`, and codes derived from it inherit the flag.

## Example API Responses

```bash theme={null}
topo api profile US-CT US-CT.BER:0668349
```

```json theme={null}
{
  "company": {
    "id": "0668349",
    "countryCode": "US-CT",
    "legalName": "AETNA INC.",
    "identifiers": {
      "alei": "US-CT.BER:0668349",
      "accountNumber": "0668349"
    },
    "legalForm": {
      "localName": "Stock Corporation",
      "englishTranslation": "Stock Corporation",
      "standardized": "Corporation"
    },
    "status": { "localName": "Active", "active": true },
    "legalAddress": {
      "addressLine1": "151 Farmington Avenue",
      "city": "Hartford",
      "region": "CT",
      "postalCode": "06156",
      "countryCode": "US"
    },
    "registrationDate": "2000-12-13",
    "activities": {
      "NAICS": [
        {
          "code": "551112",
          "description": "Offices of Other Holding Companies",
          "isMainActivity": true
        }
      ]
    }
  }
}
```


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