You can write your own shareholder agreement the same way you can set your own broken arm. Technically possible. Inadvisable in ways that will become obvious at the worst possible moment.
This question comes up constantly, and the people asking it are not naive. They are founders who have already built something real, who understand that a shareholders agreement is necessary, and who are trying to decide whether hiring an attorney to draft one is worth the cost or whether a downloaded template will do the job. That is a reasonable question. The answer is not what most people want to hear.
A Shareholders Agreement Is Not a Formality. It Is the Rulebook for Every Conflict You Haven't Had Yet
Most founders sign a shareholders agreement when the company is young, the relationships are good, and nobody can imagine a scenario where things go wrong. That is precisely the wrong mindset to bring to the document. A shareholders agreement is not a celebration of your current partnership. It is a legally binding contract that will govern your company when someone wants out, when someone stops performing, when someone dies, when someone gets divorced, or when someone decides they disagree with the direction of the business and wants to make your life difficult.
The document has to be written for the worst version of your future, not the best. That requires a specific kind of drafting discipline that is very hard to apply when you are the person who is also excited about the business and optimistic about your co-founders. An attorney is not emotionally invested in your company. That is not a limitation. That is the point.
Under Delaware General Corporation Law § 141, the board of directors holds the default authority to manage the business and affairs of a corporation. A shareholders agreement can restrict or modify that authority, but only within limits the law recognizes. The Delaware Supreme Court's January 2026 decision in Moelis & Company v. West Palm Beach Firefighters' Pension Fund clarified exactly where those limits sit, distinguishing between governance provisions that are void outright and those that are merely voidable. A provision is more likely voidable if the corporation could accomplish the same governance arrangement through some other lawful means. It is void only when no lawful means exists. The practical consequence is that a poorly drafted shareholders agreement may not be unenforceable in the way you expect. It may be enforceable in the way you did not intend.
That distinction matters enormously for founders who draft their own agreements without understanding the statutory framework underneath. You can write a provision that you believe restricts a co-founder's ability to sell shares without board approval, and discover later that the provision is voidable rather than void, which means someone with standing can challenge it on a timeline that accrues from the moment the act was taken. If you did not know that, you did not know what you were drafting.
California adds its own layer. The California Corporations Code imposes requirements on shareholder agreements for close corporations that differ from Delaware's framework, and many California founders are operating under the wrong set of rules entirely because they used a Delaware-form template without understanding that California has its own statutory scheme. The document is not the strategy. The jurisdiction is part of the strategy.
What a Shareholders Agreement Actually Needs to Do (And Why Templates Fail at This)
A functional shareholders agreement does several things at once, and each of them requires specific drafting choices that a template cannot make for you because a template does not know your company.
It establishes how decisions get made. That means specifying which decisions require unanimous consent, which require a supermajority, and which the board can make unilaterally. If you leave this vague, you have created a permanent argument. Founders disagree about what "major decisions" means approximately 100% of the time when money is involved.
It controls what happens to shares when someone leaves. A well-drafted shareholders agreement includes vesting schedules, repurchase rights, and right-of-first-refusal provisions that tell you exactly what happens when a co-founder walks out the door voluntarily, is removed for cause, or simply stops showing up. Without this, a departed co-founder can hold equity in your company indefinitely while contributing nothing and blocking transactions. This is not a hypothetical. It is one of the most common shareholder disputes in early-stage companies, and it is almost entirely preventable with proper drafting.
It addresses what happens when someone dies or gets divorced. A co-founder's spouse is not someone you chose as a business partner. Without a proper transfer restriction and buy-sell provision, a divorce proceeding or probate process can result in a third party holding a material stake in your company. California is a community property state. That is not an abstraction. Under California Family Code § 760, property acquired during marriage is presumptively community property, which means your co-founder's shares may be subject to division in a divorce unless your agreement addresses this directly.
It sets the rules for a buyout. A buy-sell provision, sometimes called a shotgun clause, establishes a mechanism for one shareholder to buy out another when the relationship has broken down. Without one, a deadlocked company can become a litigation event. With a poorly drafted one, you may trigger a buyout obligation at a valuation that destroys the company's ability to operate. The drafting of buy-sell provisions is a specific skill. There are multiple structures, each with different incentive effects, and choosing the wrong one for your ownership structure is a meaningful mistake.
Templates cannot make these choices because these choices depend on who owns what percentage, what the company does, how it is financed, what state it is organized in, and what the founders' exit intentions actually are. A template gives you blanks to fill in. What you need is someone who understands what goes in the blanks and why.
Yes, You Can Write Your Own. Here Is What That Decision Will Actually Cost You
The honest answer to the question is yes. You can write your own shareholders agreement. There is no law that requires an attorney to draft one. You can download a form, fill in the names, adjust the percentages, and sign it. That document will exist. It will look like a shareholders agreement. It will not function like one when it is tested.
The cost of a DIY shareholders agreement is not the cost of drafting it. It is the cost of litigating it. Shareholder disputes in California regularly generate legal fees in the six figures before they resolve, and that is when the agreement is reasonably well-drafted. When the agreement is ambiguous, contradictory, or missing provisions entirely, the litigation becomes longer and more expensive because there is more to argue about. A shareholders agreement drafted by an attorney costs a few thousand dollars. A shareholder dispute costs multiples of that, minimum, and that is before you account for the distraction, the damage to the business, and the personal toll of litigating against someone you used to trust.
There is also the question of what you do not know you do not know. The founders who write their own shareholders agreements are not writing bad agreements because they are careless. They are writing bad agreements because they do not know what questions to ask. They do not know that their drag-along provision needs to address minority shareholder protections. They do not know that their right-of-first-refusal clause needs a valuation mechanism or it is unenforceable as written. They do not know that their non-compete provision may be void under California Business and Professions Code § 16600, which prohibits most non-compete agreements in California with limited exceptions. They fill in the blanks and believe they have covered it. They have not.
The founders who get this right are the ones who treat the shareholders agreement as a founding document with the same seriousness they give to their cap table. Because it governs the cap table. It governs everything.
The Moment the Agreement Gets Tested Is the Moment You Find Out What It Was Worth
Every shareholders agreement looks fine until it doesn't. The test comes when a co-founder wants to leave and disputes the repurchase price. It comes when an investor wants to see clean governance documents before wiring money. It comes when a potential acquirer's legal team does due diligence and finds provisions that are inconsistent with the company's actual operating history. It comes when someone dies and the family has different ideas about what the shares are worth.
The agreement you signed in year one governs the crisis in year five. By the time you know you need it to work, it is too late to fix it without the other party's consent, and the other party has no incentive to consent to revisions that disadvantage them.
This is not a hypothetical risk. It is the predictable consequence of treating a foundational legal document as an administrative task rather than a strategic one. The founders who call me after a dispute has already started are not calling because they were negligent. They are calling because they did not understand what the document was supposed to do, so they did not understand what was missing from it.
A shareholders agreement drafted correctly protects every person who signs it, including the co-founder you are currently on good terms with. That is the version of the document you want. Not the version that protects no one because it was never designed to be tested.
Shareholder disputes are among the most expensive, most emotionally destructive, and most preventable business crises Delina handles.
If you are forming a company with partners, restructuring your ownership, or looking at an agreement you signed years ago and wondering whether it actually does what you think it does, book a paid intake with Delina. This is not a free call. It is a focused, strategic session with an attorney who has read everything above and has specific opinions about your situation.
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