Shareholder Agreement
A shareholder agreement is a private contract among a corporation's shareholders governing share transfers, board elections, and shareholder votes on major decisions. Sometimes called a stockholders' agreement, it often includes the corporation itself as a party and supplements the bylaws with contractual obligations that bind only the signing parties. Provisions typically cover transfer restrictions, drag-along and tag-along rights, board representation, voting agreements, information rights, preemptive rights, and dispute resolution. Unlike bylaws, which govern the corporation and apply to all shareholders by default, a shareholder agreement is a contract that binds only the parties that sign it.
The major provisions typically included: transfer restrictions (when and how shares can be sold, including right of first refusal, company approval, and lockup periods), drag-along rights (majority shareholders can force minority to join a sale), tag-along rights (minority shareholders can join majority sales), board representation (who has the right to appoint or nominate directors, often tied to ownership thresholds), voting agreements (shareholders agree to vote together on specified matters; common for founder voting agreements that bind founders to vote together), information rights (which shareholders get financial statements, board minutes, cap table updates and on what cadence), preemptive rights / pro-rata rights (rights to participate in future financings to maintain ownership percentage), and dispute resolution (mediation, arbitration, and venue selection). Common contexts where shareholder agreements show up: at incorporation alongside founder stock issuance (typically called a founders' agreement; covers founder vesting, transfer restrictions, voting agreements), at each priced financing round (the Investor Rights Agreement, Right of First Refusal and Co-Sale Agreement, and Voting Agreement are three of the standard NVCA financing documents that collectively function as a shareholder agreement), and at acquisition (acquirer often requires updated shareholder agreement provisions before close).
Ryan's Take
Shareholder agreements are the contracts that govern the actual relationships among shareholders, separate from the bylaws that govern the corporation. The interesting work happens in the shareholder agreement: who controls the board, who can sell shares to whom, what triggers drag-along, what triggers tag-along. The founders who don't read these documents carefully end up signing away control they didn't realize they were signing away. The Series A financing round will typically introduce a 50-page Investor Rights Agreement; read it, negotiate the provisions that matter (board composition, drag-along thresholds, information rights), and don't accept "this is standard" as the answer to "can we change this."
What founders get wrong: Not negotiating shareholder agreement provisions because their lawyer says they're "standard." Standard provisions are the baseline; the negotiated version is what protects you. Drag-along thresholds, board composition, founder protections, and information rights are all routinely negotiated, and the standard version typically favors the investor more than the founder.
Related: Bylaws · Operating Agreement · Founders Agreement · Drag-Along Rights · Tag-Along Rights
FAQ
What is a shareholder agreement?
A private contract among a corporation's shareholders (and often the corporation itself), governing how shares can be transferred, how the board will be elected, how shareholders will vote on major decisions, and what rights and restrictions apply to each shareholder. Supplements the bylaws with contractual obligations that bind only the signing parties.
What's the difference between bylaws and a shareholder agreement?
Bylaws govern the corporation and apply to all shareholders by default. A shareholder agreement is a private contract that binds only the parties that sign it. Bylaws are amendable by board or shareholder vote per the bylaws themselves; a shareholder agreement is amendable only by all signing parties.
What provisions typically appear in a shareholder agreement?
Transfer restrictions, drag-along rights, tag-along rights, board representation, voting agreements, information rights, preemptive/pro-rata rights, and dispute resolution. At priced venture financings, these are typically split across three documents: Investor Rights Agreement, Right of First Refusal and Co-Sale Agreement, and Voting Agreement (the standard NVCA financing documents).
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