Rights issues and open offers explained

If a company you hold shares in offers you the right to buy more shares, usually at a discount, you do not have to take it up. You can buy all, some or none of the new shares, sell the rights themselves if the offer allows it, or do nothing and let them lapse. Here is what each choice means.

Rights issues and open offers explained
Short answer

A rights issue is when a company offers its existing shareholders the chance to buy additional newly issued shares, usually at a discount to the market price1. The more shares you already hold, the more new shares you have the right to buy2. You are not obliged to buy them1.

A rights issue is when a company offers its existing shareholders the chance to buy additional newly issued shares, usually at a discount to the market price1. The more shares you already hold, the more new shares you have the right to buy2. You are not obliged to buy them1.

The offer is made in proportion to your existing holding, so a shareholder with more shares gets more rights. In a typical example, shareholders receive 3 rights for every 5 shares held, so someone owning 15,000 shares gets 9,000 rights3. Those rights can then be used to buy new shares, sold on if the offer allows it, or left to lapse.

An open offer, also called an entitlement issue, works in a similar way: it offers existing shareholders the right to buy new shares at a discount to the market price4. The important difference is what happens if you do nothing. In a rights issue you may receive lapsed proceeds; in an open offer you will not receive a lapsed payment4.

What is a rights issue?

A rights issue is a corporate action in which existing shareholders are offered the chance to buy additional newly issued shares, usually at a discount to the market price1. The company is raising money, and it goes to the people who already own it first. Shareholders have the option to purchase additional shares at a discounted price6.

The allocation is proportional. The more shares you already hold, the more new shares you will have the right to buy2. That is what makes it a "right": it is attached to your existing holding, not sold to the general public.

A rights issue is considered to be a type of option, since it gives a company's stockholders the right, but not the obligation, to buy new shares2. That is the same structure as an employee share option scheme, where an employee can buy shares but does not have to7. The difference is who the offer goes to and how the entitlement is worked out.

Because the new shares are issued at a discount, taking up your rights means buying shares for less than the market price. Not taking them up means no shares are lost, but your holding becomes more diluted, because the company now has more shares in issue and your slice of it is smaller8.

An open offer, also known as an entitlement issue, is a close relative: like a rights issue, it offers existing shareholders the right to buy new shares at a discount to the market price4. The mechanics are similar, but the consequences of doing nothing are not.

How many new shares you can buy: a worked example

The number of new shares you can buy depends on the ratio the company sets and the size of your holding. In one worked example, shareholders receive 3 rights for every 5 shares held on 30 January. If you own 15,000 shares on that date, you get 9,000 rights, which is 3 for every 5 shares3.

Those 9,000 rights can then be exercised. In the same example, exercising all of them produces 18,000 new shares from 9,000 rights3. So each right does not necessarily buy one share: the terms of the offer set how many rights are needed per new share. In a different example, you can use 39 rights to receive 1 new share9.

The two numbers to look for in the offer document are therefore the ratio of rights to existing shares, and the number of rights needed for each new share. Together they tell you how much cash you would need to take up the offer in full.

How a 3 for 5 rights issue converts an existing holding into rights, and then into new shares.

Your four options when you get a rights offer

There are four standard choices, and they are the same whichever provider holds your shares: take up rights, meaning buy the shares; sell rights to another investor; take up a part of the rights; or take no action1.

Take up all your rights. You buy every new share you are entitled to, at the offer price. This keeps your proportional stake in the company roughly where it was, and it is the option that requires the most cash.

Take up part of your rights. You buy some of the new shares and let the rest go. You spend less, but your holding is diluted by the portion you declined.

Sell your rights. Where the offer allows it, you can sell the rights themselves rather than the shares, and keep the cash. This is covered below.

Do nothing. Your rights lapse. What happens to their value then depends on the type of offer, and is covered further down.

The choice is yours and there is no penalty for declining. Shareholders are not obliged to buy the new shares1. What you are deciding is whether to put more money into this company at the offer price, or to let your stake shrink.

Selling your rights as nil paid shares

Where the offer allows it, holders of the stock are issued nil paid rights, which each represent a right to buy a new share, and these are tradable on the stock market6. They are traded on the market as nil paid shares5. The company gives you nil-paid rights based on how many shares you already own3.

"Sold as nil paid" means the buyer is acquiring the entitlement without having paid for the underlying new shares yet. The buyer then pays the offer price to the company when the rights are exercised. The value of a nil paid right reflects the gap between the discounted offer price and the market price of the shares.

Not all rights issues allow rights trading3. Where trading is not permitted, selling your rights is not one of your options, and the choice narrows to taking them up, taking them up in part, or letting them lapse. The offer document for the particular rights issue is what settles this.

Nil paid rights can appear as their own tradable line alongside the ordinary shares.

If you do nothing: lapsed rights and proceeds

Doing nothing is a real option, and in a rights issue it often has a cash outcome rather than simply losing the entitlement. Your rights will be sold in the market at the best available price, and the proceeds, after charges, paid to you. These are known as lapsed proceeds5.

Some offers work differently. Your rights will simply expire, sometimes with a lapsed rights payment depending on the terms3. So the phrase to look for is whether the offer provides for a lapsed rights payment or for the sale of lapsed rights, and on what terms.

There is a tax point for anyone who holds employee share options rather than ordinary shares. If you do not exercise an option and it lapses, you do not make an allowable loss for CGT purposes10. That is about employee options, not rights issues, but it is the same underlying structure of a right that can be allowed to expire.

Costs: no dealing charges or stamp duty on taking up shares

Taking up rights is cheaper than buying the same shares in the market. There are no dealing charges or stamp duty payable when you take up shares in a rights issue5. The same is true of an open offer: there are no dealing charges or stamp duty payable when you take up shares in an open offer5.

That matters because stamp duty normally applies to share purchases. Taking up shares in a rights issue carries no dealing charges and no stamp duty1. The same applies to an open offer: there are no dealing charges or stamp duty payable when you take up shares in an open offer1.

You still pay the offer price for the new shares themselves, and that is the main cost of taking up your rights. If you sell the rights instead, the sale happens in the market and normal dealing charges and stamp duty rules for that sale apply. If you do nothing and the rights are sold for you, the proceeds are paid to you after charges5.

Rights issues compared with open offers

FeatureRights issueOpen offer
Who can buyExisting shareholders, in proportion to their holding1Existing shareholders4
PriceUsually at a discount to the market price1At a discount to the market price4
Other nameRights issueEntitlement issue4
If you do nothingRights typically sold, proceeds after charges paid to you5No lapsed payment4
Costs on taking upNo dealing charges or stamp duty5No dealing charges or stamp duty5

Both are ways for a company to raise money from the people who already own it. The practical difference for a shareholder deciding what to do is the default outcome: a rights issue can produce a cash payment if you take no action, while an open offer will not4.

Where to get help and what protects you

A rights issue is a corporate action, and the terms come from the company and are administered by your platform or broker. If you hold shares through a platform, the offer will reach you through that platform, and the deadlines and dealing instructions are theirs. If you are unsure what a particular offer requires, the offer document and your provider's corporate actions team are the places to ask.

For the wider picture on how shares, dealing and platform charges work, see what shares are and how they work, how to buy and sell shares, dealing charges and stamp duty on shares. If you hold shares through a platform, dividends, corporate actions and voting when you invest through a platform explains how these events reach you. For the tax treatment of what you receive, see how investments are taxed.

Rights issues sit alongside other events that can change what you hold, such as takeovers, mergers and share reorganisations and compulsory acquisition. If a company you hold is in difficulty, the terms of any fundraising it proposes are worth reading closely before you decide.

Sources10 cited
  1. Shares and corporate actions Fidelity International, 2026
  2. Rights issue AJ Bell, 2026
  3. Rights issue Interactive Investor, 2026
  4. Open offer AJ Bell, 2026
  5. What are the different types of corporate actions that may affect me? AJ Bell, 2026
  6. Corporate actions Scottish Widows, 2026
  7. Tax on employee share schemes GOV.UK, 2026
  8. What is a corporate action? Halifax, 2026
  9. Employee share and security schemes and capital gains tax (HS287) GOV.UK, 2026
  10. Share incentive plans and your entitlement to benefits (IR177) GOV.UK, 2025

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What are shares and how do they work?
How Shares WorkWhat owning a share in a company means and how share prices move.
How to buy and sell shares
Buying and Selling SharesThe practical steps for buying and selling shares through a platform, share dealing service or stockbroker.
Dealing charges for buying and selling investments
Dealing ChargesWhat it costs to place a trade, including commission, spreads and foreign exchange fees.
How investments are taxed
How Investments Are TaxedHow capital gains tax, dividend tax and income tax apply to investments held outside tax wrappers, with the allowances that apply each tax year.

Frequently asked questions

Do I have to buy shares in a rights issue?

No. A rights issue gives you the right, not the obligation, to buy the new shares. You can take up all of your rights, take up only some of them, sell the rights themselves if the offer allows rights trading, or take no action at all. Doing nothing does not cost you money, but your existing holding becomes a smaller share of a larger company.

Why are rights issue shares sold at a discount?

The new shares are usually offered at a discount to the market price to make the offer attractive enough that shareholders take it up. The discount is what gives the rights themselves a value: a right to buy a share below the market price is worth something, and that value is what you give up if you let the rights lapse.

Can I take up only some of my rights?

Yes. Taking up part of your rights is one of the standard options. You buy some of the new shares you are entitled to and let the rest go. The shares you do not take up are not bought by you, so your holding is diluted by the portion you declined, and any value in those rights may be lost unless the offer allows them to be sold.

What happens to my rights if I ignore the offer?

In a rights issue, if you do nothing your rights are typically sold in the market at the best available price and the proceeds, after charges, are paid to you. These are known as lapsed proceeds. Some offers instead let the rights simply expire, sometimes with a lapsed rights payment depending on the terms. An open offer works differently: if you do nothing, you will not receive a lapsed payment.

Is a rights issue a type of option?

Yes. A rights issue is considered to be a type of option, because it gives shareholders the right, but not the obligation, to buy new shares. That is the same structure as an employee share option, where the employee can buy shares but does not have to. The difference is that a rights issue is offered to existing shareholders in proportion to what they already hold.

Can I sell my rights to another investor?

Often, but not always. Where the offer allows it, holders are issued nil paid rights, which each represent a right to buy a new share, and these are tradable on the stock market. Not all rights issues allow rights trading, so the terms of the particular offer decide whether you can sell. If you can, the rights are sold as nil paid shares.

Do I pay stamp duty when I take up rights issue shares?

No. There are no dealing charges or stamp duty payable when you take up shares in a rights issue. The same applies to an open offer. Stamp duty of 50p per £100 normally applies when you buy shares in the market, so taking up rights avoids that cost, though you still pay the offer price for the new shares themselves.