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Sting
November 2, 2026

Sting opens aktiebok.io, a free share register for Swedish companies

Our startups kept asking for an easier way to keep their share register, so we built one. Now we are opening aktiebok.io, a free share register and cap table, to every Swedish company.

It is free and always will be. There is no paid tier, and we will never send you newsletters or track what you do on the site. Why? Because we built it for our own startups, and it works too well to keep to ourselves. You can try it now at aktiebok.io.
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"Keeping your share register up to date should take one sentence. That is what we built for our founders, and now every Swedish startup can use it."

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says Emanuel Andersson, CEO of Propel Capital and Sting Holding

How it works

Every Swedish aktiebolag has to keep a share register, and it is easy to fall behind after the first new share issue.

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With aktiebok.io you tell your AI what happened, for example "We issued 12,000 B shares to Granliden Kapital at 84 kr." It drafts the entry with the share numbers and figures, and nothing goes into the register until you confirm it.
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It works with Claude, ChatGPT, Mistral and most other AI apps that can connect to it. aktiebok.io has no AI of its own, so you use the one you already have. You can also do everything in the browser without an AI.

What you can do in it

Every share has a number and every entry has a date. If you make a mistake, you correct or reverse it, and the history shows both. To move from an old register, you give your AI the one you have today and confirm what it enters.

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Before a new round or an exit, you can simulate it and see what it means for each holder. Shareholders can sign in with their own email to see what they own, and the company decides who gets access. You can export everything to Excel, PDF or CSV whenever you like. The full list of features is at aktiebok.io/features.

What happens to your data

Your register is never used to train an AI model, and the site has no advertising cookies. If we ever close the service, users get three months' notice.

Built for our startups. Now open to all.

Since 2002, more than 500 startups have been part of Sting, including Yubico, Sellpy, Airmee, Volumental, TERASi and IPercept. aktiebok.io started as a tool for the startups at Sting, to make life as a founder a little easier. Now it’s open to any startup, inside Sting or not.
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From today, every Swedish startup can use it at aktiebok.io.

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