The right of first refusal (ROFR) is the most fundamental restriction: any shareholder who wants to sell shares must first offer them to the existing shareholders on the same terms. Without ROFR, a co-founder can sell their equity stake to a competitor, a stranger, or anyone else without the other shareholders having any right to acquire those shares first. The co-sale right (tag-along) allows minority shareholders to participate in any sale on the same terms. Lock-up periods restrict transfers for a defined period after founding, protecting the company during its most vulnerable early stage.

When a shareholder leaves — voluntarily or involuntarily, for cause or without cause — the agreement must specify how their shares are valued and how that value is paid. The valuation methodology matters enormously: fair market value by independent appraisal produces different outcomes than book value, enterprise value multiples, or formula-based approaches. Payment terms matter equally: a departing co-founder who is owed $500,000 for their equity has very different leverage depending on whether the payment is due immediately, over three years, or contingent on a future liquidity event.

Standard voting rights allocate votes proportional to share ownership. Protective provisions give certain shareholders — typically minority holders or preferred shareholders — the right to approve or veto specific major decisions: issuing new shares, taking on significant debt, selling material assets, or changing the company’s business. For early-stage companies, protective provisions are the mechanism that prevents a majority shareholder from taking actions that materially harm minority shareholders without their consent.

Drag-along rights allow majority shareholders to compel minority shareholders to sell their shares on the same terms in a third-party acquisition. Without drag-along, a minority shareholder can block an acquisition the majority wants to approve, holding the deal hostage to their individual terms. Tag-along rights allow minority shareholders to join a sale initiated by the majority on the same terms rather than being left behind when the controlling shareholders sell out. Both provisions are standard in investor term sheets and are expected by sophisticated acquirers in any due diligence process.

When the company issues new shares — in a fundraising round, an employee equity pool expansion, or a strategic investment — existing shareholders’ percentage ownership is diluted. Anti-dilution provisions protect existing shareholders by giving them the right to purchase new shares at the issuance price before they are offered to outside parties (preemptive rights), or by adjusting the effective conversion price of their shares when new shares are issued at a lower price than they paid (weighted-average or full-ratchet anti-dilution protection).

A 50-50 split between two equal shareholders who cannot agree is a corporate deadlock. Neither can override the other. Neither can force the other out. The company is effectively ungovernable. The deadlock resolution provision establishes a mechanism for breaking the impasse: a buy-sell (Russian roulette) clause where either party can offer to buy the other out at a named price; a mediator with binding authority on specific categories of decision; a casting vote held by a mutually agreed third party; or an escalation process to independent valuation and court-supervised dissolution as a last resort.

Whether shareholder disputes are resolved by arbitration, mediation, or court litigation — and which state’s law governs the agreement — determines the cost, speed, and strategic leverage of any dispute. Delaware corporate law is the most developed body of business entity law in the US and is frequently chosen as governing law regardless of where the company operates. California, New York, and Texas each have distinct standards for shareholder agreements that produce different outcomes on key enforceability questions.