The Company Type code informs on the legal declaration of the company.
These declarations can be classified on the basis of the following criteria :

• Liability & Capital Structure: Does the entity limit the liability of its owners via shares, via guarantees, or not at all (unlimited)? Is it permitted to offer shares to the general public?
• Governance Model (Corporate vs. Partnership): Is the entity structured around directors and shareholders, or is it governed by partners working together under a partnership agreement?
• Primary Purpose (For-Profit vs. Social/Charitable/Mutual): Was the entity formed primarily to generate private profit, or is it legally locked into serving a community, charitable, educational, or mutual/co-operative purpose?
• Regulatory & Jurisdictional Nature: Is the entity a specialized financial vehicle (regulated by the FCA), a foreign/cross-border entity, a regulatory registrant, or a historical administrative status?

Private Limited Companies

The standard, most common for-profit UK business structure where owners’ liability is limited to the capital they invested in shares, and shares cannot be offered to the general public. (Note: Differ from Guarantee companies because of their commercial share-capital structure)

• Private Limited Company

Public Limited Companies

Entities permitted to raise capital by offering shares to the general public, subject to stricter regulatory and minimum capital requirements. This includes historical transitional forms (Old Public Company) and European/post-Brexit public corporate frameworks (European Public Limited-Liability Company (SE) and United Kingdom Societas).

• J – Public Limited Company
• S – Old Public Company
• T – European Public Limited-Liability Company (SE)
• AB – United Kingdom Societas

Limited by Guarantee, Non-Profit & Social Enterprises

Entities designed for social, charitable, community, or non-profit objectives. Instead of shareholders looking for financial returns, they typically have “guarantors” or trustees, asset locks (Community Interest Company), charitable commission oversight (Charitable Incorporated Organisation and  Scottish Charitable Incorporated Organisation), or specific exemptions from using the word “Limited” due to their benevolent nature (PRI/LBG/NSC and  PRIV LTD SECT).

• B – PRI/LTD BY GUAR/NSC (Private, limited by guarantee, no share capital)
• E – PRI/LBG/NSC (Private, Limited by guarantee, no share capital, use of ‘Limited’ exemption)
• F – Charitable Incorporated Organisation
• G – Community Interest Company
• K – Scottish Charitable Incorporated Organisation
• U – PRIV LTD SECT. 30 (Private limited company, section 30 of the Companies Act)

Partnerships & Joint Collaborations

Businesses owned and run by partners rather than shareholders and directors. This includes LLPs (Limited Liability Partnership), traditional/limited partnerships (Limited Partnership and  Scottish Partnership), and UK Economic Interest Groupings, which function similarly to partnerships to facilitate cross-business collaboration.

• C – Limited Partnership
• D – Limited Liability Partnership
• O – Scottish Partnership
• AA – United Kingdom Economic Interest Grouping

Mutuals & Co-operative Societies

Member-owned organizations (co-operatives, credit unions, community benefit societies) registered under the Co-operative and Community Benefit Societies Act 2014 (formerly Industrial and Provident Societies). They operate for the mutual benefit of their members rather than external investors.

• I – Registered Society
• P – Industrial and Provident Society

Investment & Financial Vehicles

Specialized corporate structures regulated by the Financial Conduct Authority (FCA) used exclusively for collective investment schemes (open-ended investment funds) and insurance/risk-segregation vehicles (Protected Cell Company).

• N – Investment Company with Variable Capital
• R – Investment Company with Variable Capital(Umbrella)
• V – Investment Company with Variable Capital (Securities)
• X – Protected Cell Company

Unlimited Liability Companies

Incorporated companies where shareholders/members have no limit on their liability for the company’s debts if it enters formal liquidation. Often used for specific tax planning, privacy (exemptions from filing public accounts), or group structuring.

• L – Private Unlimited Company
• Q – Private Unlimited

Public Sector & Royal Charter Bodies

Prestige, educational, or quasi-public institutions created either by a grant from the Monarch (Royal Charter Company — e.g., BBC, Bank of England, older universities) or by statutory educational legislation (Further Education and Sixth Form College Corps).

• M – Royal Charter Company
• Y – Further Education and Sixth Form College Corps

Overseas, Regulatory & Miscellaneous

Non-standard UK corporate records. This groups foreign entities owning UK property (Overseas Entity), regulated anti-money-laundering filing agents (Authorised Company Service Provider), historical/closed records (Converted/Closed), and uncategorized categories (Other company type).

• H and W – Other company type
• Z – Converted/Closed
• AC – Overseas Entity
• AD – Authorised Company Service Provider