If you've set up a company in New Zealand (or you're about to), it's easy to focus on the exciting parts - launching, making sales, hiring your first team members, or raising investment.
But there's one compliance task that quietly sits at the centre of "doing things properly" as a company: keeping your share register accurate and up to date.
A share register is more than just an admin spreadsheet. It's the official record of who owns your company, what they own, and when those ownership changes happened. If it's missing, incorrect, or out of date, you can end up with avoidable disputes, delays when investors come in, and headaches when you're trying to sell the business.
In this guide, we'll break down what a share register is, who needs one, what it should include, and how to keep it up to date as your business grows.
What Is A Share Register (And Why Does It Matter In NZ)?
Your share register is the company's internal record of its shareholders and their shareholdings. In plain terms, it's the document that answers questions like:
- Who owns the company?
- How many shares does each person (or entity) hold?
- What class of shares do they hold (if there's more than one class)?
- When did they become a shareholder?
- Have any shares been transferred, issued, bought back, or cancelled?
This matters because company ownership is not just a "nice-to-have" record - it affects control, voting, profits/dividends, and decision-making. If there's ever a disagreement between founders, a shareholder exits, or an investor asks to see your cap table, your share register is one of the first places everyone will look.
It also becomes critical in high-stakes moments, such as:
- bringing on a new co-founder or early employee shareholder
- raising capital from friends/family or professional investors
- selling your business (or doing due diligence for a buyer)
- restructuring ownership between companies or trusts
- handling a founder departure or dispute
Getting your share register right from day one helps you avoid the classic "we think we agreed to X" situation later - because your company records should show exactly what happened.
Is A Share Register Legally Required For NZ Companies?
In New Zealand, companies are required to keep certain company records - including a share register that records shareholdings and shareholder details.
Exactly what must be recorded (and how it's kept) will depend on your company's circumstances, but as a practical matter:
- Companies need a share register that accurately records the shares on issue and who holds them.
- That register needs to be updated when anything changes (like a share issue or transfer).
- Your internal records should match the legal reality reflected in your approvals and documents.
Even if you're a small company with a single director and a single shareholder, a share register is still important. It's how you prove ownership and track your company's share history over time.
It's also worth keeping in mind that, in addition to maintaining your internal share register, New Zealand companies generally have Companies Office notification obligations for certain changes to shareholdings/shareholder details (so your internal records and your public filings should stay consistent).
And if you ever want to:
- add shareholders,
- allocate shares in a startup,
- or bring in investors,
you'll be very glad you have your register sorted and backed by proper company documents.
It's also worth remembering that you may have other "foundational" corporate documents sitting alongside your share register, such as a Company Constitution and a Shareholders Agreement, which often set the rules for how shares can be issued or transferred in the first place.
What Should A Share Register Include?
A good share register is clear, complete, and easy to rely on. It should be capable of answering: "If someone challenged who owns this company today, could we prove it?"
While the exact format can vary (some companies keep a formal register; some keep a cap table supported by resolutions and share certificates), your share register commonly includes the following details.
1. Shareholder Details
For each shareholder, you'll usually record:
- full legal name (individual or entity)
- address (and sometimes an address for service)
- contact details (practical, even if not strictly required for all purposes)
If the shareholder is a company or a trust, make sure you record the correct legal entity name - not just the trading name.
2. Shareholdings (What They Own)
This section usually includes:
- number of shares held
- share class (if applicable)
- whether shares are fully paid or unpaid/partly paid (if relevant)
Many small businesses start with a single class of ordinary shares. But once you have investors, employee equity, or more complex structures, share classes can become more important (and more technical).
3. Dates And Movements (What Changed, And When)
This is where share registers often fall over - not because people don't know who owns what, but because the "paper trail" isn't kept up to date.
You should track things like:
- date shares were issued
- date shares were transferred
- date shares were cancelled or bought back (if that occurs)
- reference to supporting documents (e.g. director/shareholder resolutions)
If your company has ever had a change in ownership, your share register should tell that story clearly.
4. Supporting Company Records
Your share register doesn't sit in isolation. It should line up with, and be supported by, your key company documentation - for example:
- share issue or transfer documents
- directors? resolutions and/or shareholders? resolutions
- any shareholder entry/exit documents
- your constitution (if you have one)
For example, if you're doing a share transfer, it's common to have the relevant approvals and paperwork in place (and in many companies, there are restrictions and processes that must be followed). If you're not sure whether your internal rules allow a transfer, this is where a share transfer process (and proper advice) becomes important.
When Do You Need To Update Your Share Register?
As a small business owner, the easiest way to think about it is: if ownership changes (or could change), your share register should be checked and updated.
Here are the most common situations where your share register needs attention.
Issuing New Shares
If your company issues new shares - whether to a co-founder, investor, employee, or related entity - your share register should be updated immediately to reflect:
- the new total shares on issue
- the new shareholder (or increased holding of an existing shareholder)
- the issue date and any relevant approvals
This often comes up when founders are working out equity splits or when you're raising capital. If you're doing anything other than a very simple "50/50 between two founders" setup, it's usually worth getting proper documentation in place, including a Founders Agreement to reduce the risk of misunderstandings later.
Transferring Shares Between Shareholders (Or To Someone New)
Share transfers are common when:
- a founder exits
- you bring in an investor by buying shares from an existing shareholder
- ownership is reorganised between family members, trusts, or holding companies
If a transfer happens but the share register doesn't reflect it, you can end up with two different versions of "who owns the company" - which is exactly the kind of thing that derails deals and triggers disputes.
Share Buybacks Or Cancellations
These are more complex and usually involve stricter processes and legal checks. But from a record-keeping point of view, the register must show what happened to the shares and when they stopped being on issue.
Changing Shareholder Details
Sometimes ownership doesn't change, but shareholder information does - for example, a shareholder changes address or their legal name changes.
It's still important to keep this accurate. It helps with notice requirements, shareholder communications, and due diligence later on.
When You're Preparing For Investment Or A Sale
If you're about to raise investment or sell the business, you should treat your share register as a "must-check" item early - not something you scramble to fix later.
Buyers and investors will often want to understand your ownership structure quickly, and a messy or incomplete share register can raise red flags. If you're preparing for a transaction, you may also be looking at documents like a Business Sale Agreement and getting your legal foundations organised so due diligence doesn't stall the deal.
Common Share Register Mistakes (And How To Avoid Them)
Most share register problems happen for totally understandable reasons: you're busy running the business, you made decisions quickly early on, and you assumed you could "tidy it up later".
The issue is that "later" often arrives when money is on the table - and at that point, fixing records can become stressful and expensive.
Mistake 1: Treating The Share Register As Optional Admin
Your share register is evidence of ownership. If there's ever a dispute between founders, or confusion about who holds voting rights, dividends, or control, your share register matters.
How to avoid it: Build share register updates into your process whenever you change ownership or issue shares. Make it part of your "close the loop" checklist.
Mistake 2: Not Matching The Share Register To The Legal Paperwork
A share register should reflect the legal reality, supported by proper approvals and documentation. If you have a share register that says someone owns 30%, but you can't produce the resolutions or issue documents, it can create uncertainty.
How to avoid it: Keep the supporting documents together (digitally and/or in a company records folder), and update them at the same time.
Mistake 3: Handshake Deals On Equity
It's common for founders to agree to equity splits informally (especially when you're moving fast early on). The problem is that memory and expectations can drift - particularly if someone contributes more time or money later, or if the business changes direction.
How to avoid it: Document the deal properly. If equity is subject to milestones or time, a Share Vesting Agreement can help align ownership with actual contribution.
Mistake 4: Forgetting About Shareholder Rights And Restrictions
Many companies have rules about:
- when shares can be transferred
- who must approve a transfer
- rights of first refusal (existing shareholders get first option)
- drag-along or tag-along rights when selling
These rules often live in your constitution or shareholders agreement. If you ignore them, you can end up with a transfer that is disputed or ineffective.
How to avoid it: Before changing ownership, check your governing documents and get advice if you're unsure.
Mistake 5: Not Thinking Ahead To Growth
Even if your business is small today, your ownership structure might not stay simple. If you plan to:
- bring on investors,
- offer equity incentives,
- sell the business,
- or restructure,
your share register needs to be reliable.
How to avoid it: Keep your share register "deal-ready" as you go, not just when a deal appears.
How To Keep Your Share Register Up To Date (A Practical Checklist)
You don't need an overly complicated system to maintain a good share register - you just need a consistent one.
Here's a practical checklist many small businesses follow.
1. Decide Where Your Share Register Will Live
Choose a central "source of truth" and stick to it. For many small companies, this is:
- a formal share register document stored in your company records folder, and/or
- a cap table spreadsheet backed by signed resolutions and issue/transfer documents
Whatever you choose, make sure it's secure, backed up, and accessible to the people responsible for maintaining it.
Don't leave it for later. Update it as soon as you:
- issue shares
- transfer shares
- cancel or buy back shares
- change shareholder details
This habit alone prevents most share register problems.
3. Keep Supporting Documents Together
Your share register is strongest when it's supported by clear paperwork. Depending on what's happening, this might include:
- board/shareholder approvals and resolutions
- signed agreements about share rights, vesting, or restrictions
- transaction documents if you're buying/selling shares
If the ownership change is tied to a broader business arrangement (for example, a contractor or employee receiving equity), it's also smart to make sure your other documents are aligned - like your Employment Contract and any confidentiality/IP protections.
4. Do A Regular "Company Records Health Check"
Set a reminder (quarterly or twice a year) to review:
- your share register
- your constitution and shareholders agreement (if you have them)
- director/shareholder details and key registers
This is especially helpful if you've had lots of changes in the business over a short period.
5. Get Advice Before Complex Changes
Share changes can have tax, governance, and legal consequences - and those consequences don't always show up immediately. This article is general information only and isn't legal, financial, or tax advice.
If you're planning something like an investor round, a founder exit, or an ownership restructure, it's usually worth getting tailored advice before documents are signed.
Key Takeaways
- A share register is your company's record of who owns shares, what they own, and how ownership has changed over time.
- Keeping your share register accurate is essential for good governance, reducing disputes, and being "deal-ready" for investment or a sale.
- Your share register should clearly record shareholder details, shareholdings (including share classes), and key dates for share issues and transfers.
- You should update your share register whenever shares are issued, transferred, bought back/cancelled, or when shareholder details change.
- Most share register problems come from not keeping records aligned with the supporting documents - so keep approvals, agreements, and share paperwork together.
- If you're planning an equity restructure, bringing on investors, or changing founder ownership, getting legal advice early can save you major time and cost later.
If you'd like help getting your share register sorted, updating your company records, or documenting a share issue/transfer properly, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.
