Trigger Events In Shareholder Agreements: A Practical Guide For Startups

When you start a business with a co-founder, it’s easy to focus on the exciting parts: building the product, signing customers, hiring your first team member, and pitching investors.

But if you’re building in Australia (especially as a startup or small business), there’s one reality you can’t ignore: things change. Co-founders fall out, someone gets sick, a director resigns, a shareholder wants to cash out, or a bigger company comes along and offers to buy.

This is exactly where a well-drafted shareholder agreement becomes a practical tool, not just a “nice-to-have”. One of the most important components is the set of rules around trigger events.

In this guide, we’ll walk you through what a trigger event is, why it matters, common trigger events Australian businesses include, and how to set them up in a way that protects your company (and your relationships) when the unexpected happens.

What Is A Trigger Event In A Shareholder Agreement?

A trigger event is a defined situation that “triggers” certain rights, obligations, or processes under your shareholder agreement.

Think of it as an agreed roadmap for high-stakes moments. Instead of scrambling to negotiate when emotions are high (or when time is critical), you and your co-owners decide the rules upfront.

Trigger events commonly lead to outcomes such as:

• one shareholder being required to sell their shares (a “forced transfer”);
• other shareholders getting a first option to buy (pre-emptive rights);
• changes in voting rights or control;
• valuation processes being activated (how shares are priced);
• deadlock resolution processes being triggered.

This is why trigger events aren’t just legal theory. They’re a day-to-day risk management tool for founders, family businesses, and growing companies with multiple owners.

In many businesses, trigger events are set out in a Shareholders Agreement, sometimes supported by a constitution and other governance documents.

Why Trigger Events Matter For Startups And Small Businesses

If your business has more than one owner, you’re already in a long-term relationship with legal and financial consequences.

Trigger events matter because they help you manage three common pressure points:

1. They Protect The Business When Someone Leaves (Or Needs To Leave)

Without clear rules, a departing shareholder can remain “stuck” on your cap table. They may still have voting rights, access to certain information, or influence over major decisions.

A trigger event can help you deal with exits cleanly, including where an owner is no longer contributing but still holds equity.

2. They Reduce The Risk Of Disputes (And Costly Negotiations)

Many disputes aren’t really about the business. They’re about uncertainty: “What happens now?” “Who gets to decide?” “How much are the shares worth?”

Trigger events reduce ambiguity by setting the process in advance.

3. They Make Your Business More Investable

Investors (and sophisticated advisors) often want to see that the company has thought through key risk points: founder exits, share transfers, decision-making issues, and continuity planning.

A shareholder agreement with clear trigger events can signal good governance and reduce “deal friction” later.

And if you’re also putting in place governance documents like a Company Constitution, it’s important those documents work together rather than contradict each other.

Common Trigger Events Australian Businesses Should Consider

There’s no single “right” list of trigger events. The right set depends on your business model, who the shareholders are, and what you’re trying to protect.

That said, there are some trigger events that come up again and again for Australian startups and small businesses.

Founder Or Key Person Leaves The Business

This is one of the most common (and most important) trigger events for startups.

You might define a trigger event where a shareholder:

• resigns as an employee or contractor;
• stops working for the business;
• is terminated (with or without cause);
• fails to meet minimum contribution requirements (for example, agreed hours or responsibilities).

Often, this links to “good leaver” vs “bad leaver” outcomes, which can affect:

• whether they must sell their shares;
• how their shares are valued (for example, fair market value vs discounted);
• the timing of payments.

If your founders are also employees, you’ll usually want this to align with your employment arrangements too, including an appropriate Employment Contract.

Death Or Incapacity

It can feel uncomfortable to plan for this, but for small businesses (especially family businesses), it’s essential.

A trigger event might apply if a shareholder:

• dies;
• loses legal capacity;
• is medically unable to perform their role for a defined period.

The shareholder agreement can set out whether the shares:

• must be transferred to remaining shareholders;
• may be purchased by the company (where this is permitted and properly implemented under the Corporations Act 2001 (Cth) and the company’s constitution);
• can be held by the estate (and what rights the estate has in the meantime).

From a practical perspective, this can stop your business from ending up in a situation where an estate (or family members with no involvement in the business) becomes a long-term shareholder by default.

Bankruptcy Or Insolvency Of A Shareholder

If an individual shareholder becomes bankrupt, their shares may become part of the bankruptcy estate, which can create serious risks for your business.

Many agreements treat bankruptcy/insolvency as a trigger event that allows (or requires) a transfer of shares to protect the company and other shareholders.

Attempted Share Transfer To A Third Party

A very common trigger event is when a shareholder tries to sell or transfer shares to someone else.

Without clear restrictions, you could end up with a new shareholder you never chose (a competitor, an estranged family member, or simply someone who doesn’t align with the business).

This trigger event often activates:

• pre-emptive rights (existing shareholders get first right to buy);
• board consent requirements (where your constitution/shareholder agreement gives the directors that power);
• valuation procedures;
• drag-along or tag-along rights (more on this below).

Major Breach Or Misconduct

Some shareholder agreements include a trigger event where a shareholder commits a serious breach, such as:

• fraud or dishonesty;
• material breach of the shareholder agreement;
• breach of confidentiality or misuse of intellectual property;
• criminal conduct that damages the business.

These clauses are usually drafted carefully because they can be contentious. The key is to define the trigger event clearly, include procedural fairness (for example, notice and an opportunity to respond), and specify what happens next.

Deadlock Between Shareholders

If your company has two equal shareholders (for example, 50/50), deadlock is a real risk. A deadlock might occur when:

• shareholders can’t agree on a major decision;
• there’s a repeated tied vote at board or shareholder level;
• the business is unable to operate properly because approvals can’t be obtained.

A deadlock trigger event can activate a resolution mechanism such as:

• mediation;
• chairperson casting vote (if agreed, and if your governance documents allow it);
• a buy-sell mechanism (like a “shotgun” clause);
• structured exit or liquidation process.

The goal isn’t to “win”. It’s to avoid the business being paralysed.

How Trigger Events Usually Work (Process, Valuation And Share Transfers)

Defining a trigger event is only half the job. You also need to define what happens after the trigger event occurs.

Most shareholder agreements deal with this in a structured way.

Step 1: Notice Of The Trigger Event

The agreement should explain:

• who must give notice (the affected shareholder, the board, or other shareholders);
• how notice is given (email, written notice, etc.);
• the timeframe for notice (for example, within 5 business days).

Step 2: Whether A Share Transfer Is Mandatory Or Optional

Some trigger events create a mandatory obligation to sell (for example, bankruptcy). Others may create an option for remaining shareholders to buy.

This is a strategic decision. Mandatory transfers can protect the business, but they can also feel harsh if the trigger event is outside someone’s control (like illness). Many businesses use a “menu” approach where the consequences depend on the type of trigger event.

Step 3: Valuation Method

Valuation is where many disputes arise, especially if the company is growing quickly or has significant intangible value (like brand, IP, or recurring revenue).

Common valuation approaches include:

• Agreed formula (for example, a multiple of EBIT/EBITDA, or a revenue multiple);
• Independent valuer appointed under the agreement;
• Director- or board-approved value (usually only where the governance documents permit it, and often with safeguards to manage conflicts);
• Last fundraising price (sometimes used in startups, but it may not fit all scenarios).

You’ll also want to decide who pays for the valuation and how long the process can take.

Step 4: Payment Terms

Even if the price is agreed, the buyer still needs to pay.

Your agreement may deal with:

• whether payment is upfront or by instalments;
• timeframes for completion;
• security for payment (if relevant);
• what happens if the buyer defaults.

For small businesses, instalments can be practical because it avoids putting cash flow under pressure. But the selling shareholder will usually want certainty and safeguards.

Step 5: Completion Mechanics

This includes the paperwork and actions needed to actually transfer the shares, update registers, and deal with director changes (if any).

If you’re not careful, you can end up with a “deal agreed in principle” but never properly completed, which creates long-term governance headaches.

Practical Drafting Tips: Getting Trigger Events Right (Without Overcomplicating It)

Trigger events should be practical and written for real life. Here are some drafting principles we often discuss with Australian founders and small business owners.

Be Specific About What Counts As A Trigger Event

If a trigger event is too vague, it becomes hard to enforce and easy to argue about.

For example, instead of “misconduct”, you might define specific behaviours that qualify, and include thresholds such as “material breach” or “serious breach that is not remedied within 14 days after notice”.

Align Your Shareholder Agreement With Your Other Documents

Your shareholder agreement doesn’t exist in isolation.

It needs to work alongside:

• your company constitution;
• employment agreements and contractor agreements;
• IP assignment and confidentiality provisions;
• any equity incentive arrangements or vesting terms.

For example, many startups use vesting to manage founder exits. If you’re using vesting, it’s worth considering whether a dedicated vesting document (like a Share Vesting Agreement) sits alongside your shareholder agreement so the rules are clear and enforceable.

Include Sale Rights Like Drag-Along And Tag-Along

Not all trigger events relate to “bad news”. Some relate to growth and exits.

Two common examples are:

• Drag-along rights: if a majority shareholder sells, they can require minority shareholders to sell too (so a buyer can acquire 100%).
• Tag-along rights: if a majority shareholder sells, minority shareholders can “tag along” and sell on the same terms (so they aren’t left behind with a new controlling shareholder).

These rights are often triggered by a proposed sale above a certain threshold (for example, more than 50% or 75% of shares).

Think About Confidentiality And IP When Someone Exits

When a shareholder leaves, the risk isn’t only about their shares. It can also be about confidential information, customer relationships, and intellectual property.

While these are often handled through employment or contractor terms, the shareholder agreement can also reinforce expectations, especially where shareholders have access to sensitive information and strategic decisions.

Don’t Copy-Paste Clauses Without Considering Your Cap Table

Many businesses try to reuse template clauses from other companies, but the “right” trigger event structure depends on things like:

• who owns what percentage;
• whether you have a majority/minority split;
• whether investors are involved;
• whether founders are employees or contractors;
• how the business makes money (services vs product vs marketplace);
• how realistic it is for shareholders to fund a buyout.

A clause that works for a venture-backed startup may be unworkable for a family business (and vice versa).

What Other Legal Documents Should Support Your Shareholder Agreement?

Trigger events sit inside a wider legal framework. If you’re serious about protecting the business, you’ll usually want to consider a bundle of documents that work together.

Depending on your business, that might include:

• Shareholders Agreement: sets the ownership rules, decision-making, transfers, and key trigger event mechanisms.
• Company Constitution: a core governance document that can set rules for how the company operates, voting, and share classes (often needed alongside a shareholder agreement).
• Employment Contract: if founders or key shareholders are working in the business, a tailored employment agreement can clarify duties, pay, notice, confidentiality, and termination processes.
• Privacy Policy: if you collect personal information from customers (even via a simple website enquiry form), it’s usually important to have a clear Privacy Policy explaining how you collect, use, and store data.
• Terms With Customers: if you sell goods or services, well-drafted customer terms can reduce disputes and help you manage expectations (especially around payment, cancellations, and liability).
• Exit / Transfer Documentation: when a trigger event leads to a share transfer, you’ll usually need formal share transfer paperwork to complete the process correctly.

If your company is also taking on funding secured against assets, that’s where security interests (and registration) can come into play. In some cases, businesses also use documents like a General Security Agreement as part of a broader finance arrangement.

Key Takeaways

• A trigger event is a defined situation in your shareholder agreement that activates specific rights and processes, often involving share transfers, valuation, and decision-making.
• Trigger events help protect your business when co-founders leave, relationships change, or unexpected issues arise, reducing uncertainty and disputes.
• Common trigger events for Australian startups and small businesses include founder exits, death/incapacity, bankruptcy, attempted share transfers, serious misconduct, and shareholder deadlock.
• Strong trigger event clauses don’t just define the event - they also set out the steps that follow, including notice requirements, whether a transfer is mandatory, how shares are valued, and payment terms.
• Trigger events work best when they align with your wider legal setup, including your constitution, employment arrangements, and any vesting terms.
• Putting these rules in place early can make your business easier to run, easier to invest in, and much easier to exit when the opportunity (or challenge) arises.

If you’d like help putting a shareholder agreement in place (or updating one) with practical trigger event clauses that fit your business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.