Articles or shareholders' agreement: which document does what?
A company often needs both documents, but they perform different jobs. Articles form part of the company's constitution. A shareholders' agreement is a contract between its parties. Consistency matters more than duplicating every clause.
Understand the constitutional layer
Section 33 Companies Act 2006 gives the company's constitution statutory contractual effect between the company and members. Articles regulate matters such as share rights, meetings, directors' powers and transfers. They are filed publicly, so confidential commercial detail may not belong there.
Amending articles requires the proper company-law process, usually a special resolution, subject to relevant restrictions and any entrenched provisions. Changes and resolutions may need filing. A private email agreement between two founders does not automatically update the public constitutional document.
Use the private agreement for the right promises
A shareholders' agreement can address information rights, reserved matters, funding commitments and arrangements between founders or investors. It generally binds those who are parties. New shareholders may need to join through an appropriate accession mechanism.
Example: The shareholders' agreement promises that a founder can block a particular decision, while the articles permit the board to take it without that consent. The consequences can be complex: contractual breach and corporate validity are different questions. A clause saying one document prevails is not a substitute for drafting the documents coherently.
Review the documents as one system
Compare voting thresholds, transfer restrictions, leaver provisions, drag and tag rights, share classes and board arrangements. Check who must consent to amendments and what happens when a shareholder leaves or a new investor joins. Avoid obligations that improperly constrain the company's statutory powers.
Keep the executed shareholders' agreement, current articles and relevant resolutions together. During fundraising, review the final documents against the negotiated term sheet and identify any new rights introduced during drafting. This guide focuses on private companies in England and Wales; specific structures and cross-border arrangements can need additional analysis.
Your next steps
- Allocate constitutional rights and private contractual promises deliberately.
- Check voting, transfers and leaver mechanics for conflicts across documents.
- Complete the proper amendment, accession and filing steps when ownership changes.
Sources and scope
General legal information. The contract, applicable jurisdiction and particular facts can change the outcome. This guide does not replace advice on your individual circumstances.