Shareholder agreements: what you actually need

Most co-owned businesses start the same way: two or more people who trust each other, a handshake, and a plan to sort out the details later. “Later” usually arrives as a crisis — a falling-out, a death, an offer to buy, a partner who wants to cash out. A shareholder agreement is what you wish you’d signed before that day.

What it is, and what happens without one

A shareholder agreement is a contract among the owners — and usually the company itself — that governs how you run and eventually leave the business together. Without one, you fall back on the default corporate statute and a bare set of articles nobody really chose. That means the majority can generally have its way, a co-owner can sell their shares to a stranger you’d never have picked, and there’s no clean mechanism to buy out someone who leaves, dies, or simply stops pulling their weight. You inherit a rulebook written for the average company, not yours.

The clauses that earn their keep

A good agreement is mostly a set of answers to “what happens if” questions you’d rather not think about:

• Decision-making and control. What can be done by simple majority, and what needs unanimity or a supermajority — issuing new shares, taking on major debt, changing the business, selling it. This is how a minority owner keeps a seat at the table.
• Share-transfer restrictions and a right of first refusal. No owner can sell to an outsider without first offering the shares to the others. It keeps ownership among the people who built the thing.
• A buy-sell or “shotgun” mechanism. The way out when owners can’t agree: one names a price to buy the other out, and the other can either accept or flip it and buy at that same price. Blunt, but it forces a fair number and a clean break.
• Drag-along and tag-along. If the majority sells, drag-along lets them require the minority to sell too (buyers usually want 100%); tag-along lets the minority join the sale on the same terms. Both matter enormously at exit.
• Leaver provisions. What happens to someone’s shares when they resign, are fired, become disabled, or die — often funded by insurance so the company can actually afford the buyout.
• Valuation. How shares get priced when someone exits — a formula or an independent valuation. Decide the method now, while it’s abstract, not in the middle of a fight when everyone’s doing math in their own favour.
• Deadlock and disputes. A tie-breaker for 50/50 companies and an agreed path (mediation, arbitration) so a disagreement doesn’t become a lawsuit that sinks the business.

Do it while you’re friends

The reasons people skip a shareholder agreement — it feels awkward, it costs money, everyone’s aligned right now — are exactly the reasons it works. You negotiate fair terms precisely when nobody knows whether they’ll be the one leaving or the one staying, buying or selling. Try to write these rules after a falling-out and every clause becomes a battlefield, because by then everyone knows which side they’re on.

It also matters when you sell

A buyer running due diligence wants to see a clean, current shareholder agreement. Ambiguity or open conflict among the owners is a risk they’d rather discount for than inherit — so a solid agreement quietly protects your value at exit, not just your peace along the way.

If you own a business with someone else and you’ve never signed one — or signed one years ago and never looked again — that’s worth a short conversation before you actually need it.