What is a share buyback? A worked example and how to read the announcements

A share buyback is when a company uses its own cash to buy its own shares from shareholders. The shares are then cancelled or held in treasury, so fewer shares are in issue. This post works through the arithmetic and shows how to read a UK buyback announcement. News tone about a buyback is not a share-price forecast.

By MarketFrame · Published 29 October 2026

The short answer: what a share buyback is

In UK law, section 690 of the Companies Act 2006 says a limited company with a share capital "may purchase its own shares". It has to follow the rest of that chapter of the Act and any limits in its own articles. Cash leaves the company and goes to the shareholders who sell. The shares they sold stop counting as ordinary shares held by investors.

A listed company usually buys on the stock exchange. The Act calls this a "market purchase", and section 701 says shareholders must first authorise it by resolution. That resolution must state the maximum number of shares the company may buy and an expiry date no more than five years away. This is why buyback authorities show up in annual general meeting resolutions every year.

A worked example with made-up numbers

Every number in this section is illustrative. It is not a real company and it is not a prediction.

A company has 100 million shares in issue and earns £20 million a year. It spends £10 million buying back its own shares at £2.00 each.

Shares bought: £10 million divided by £2.00 is 5 million shares.
Shares left in issue: 100 million minus 5 million is 95 million.
Earnings per share before: £20 million divided by 100 million is 20p.
Earnings per share after, assuming earnings stay the same: £20 million divided by 95 million is about 21.05p.
A holder with 1 million shares who does not sell: they owned 1.00% of the company before and own about 1.05% after.

The per-share figure went up, but the company did not earn a penny more. Only the number of shares changed. The £10 million has also left the company, and in real life that cash could have been earning interest, paying down debt or funding the business. This simple sum ignores all of that. Use it to understand the mechanics, not to judge whether a buyback was worth doing.

Why companies do it, in the companies' own words

The announcement normally states a purpose, and UK rules shape how that purpose is written. Article 5 of the UK Market Abuse Regulation gives buyback programmes a legal safe harbour only if the programme's "sole purpose" is one of three things:

to reduce the issuer's capital
to meet obligations from debt instruments that can be exchanged into shares
to meet obligations from share option programmes or other share allocations to employees or directors

Commentary often adds its own reasons, such as "returning surplus capital" or "a vote of confidence". Read the purpose line in the company's announcement first. That is what the board has formally stated, and it can differ from what a headline says.

What happens to the bought shares: cancelled or held in treasury

The Companies Act gives two outcomes.

Cancelled. Under section 706, unless the treasury rules apply, purchased shares "are treated as cancelled" and issued share capital is reduced by their nominal value.
Held in treasury. Under section 724, shares bought out of distributable profits can be held by the company as treasury shares. Section 726 says the company cannot exercise any rights on them, including voting, and no dividend may be paid on them. Section 729 lets the company cancel treasury shares at any time.

This affects the arithmetic. The FCA's listing rules require a purchase notice to state how many shares are held in treasury and how many shares are in issue less treasury shares. When you work out per-share figures, use that "in issue less treasury" number.

How a UK listed company announces a buyback

The FCA's UK Listing Rules (UKLR 9.6) set out the steps.

Proposal. UKLR 9.6.4R: the board must notify a regulatory information service (RIS) of any decision to ask shareholders for authority to buy back shares. Renewing an existing authority is exempt.
Programme launch. Under UK MAR Article 5, full details of a programme are disclosed before trading starts.
Purchase notices. UKLR 9.6.6R: purchases must be notified to an RIS "by no later than the end of the 7th daily market session" after the purchase. The notice must give the date, the number of shares, the highest and lowest prices paid, and how many shares are being cancelled and how many are going into treasury.

UKLR 9.6.1R and 9.6.2R add a size test. Purchases of 15% or more of a class of shares under a general authority must be made by a tender offer to all holders of that class, unless shareholders have specifically approved the full terms.

A real example shows what this looks like. On 31 July 2026 Lloyds Banking Group announced a programme "to repurchase up to £1 billion of ordinary shares". It said "the sole purpose of the programme is to reduce the ordinary share capital" and that it intends to cancel the shares. The programme is to end "no later than 27 January 2027". It runs under an authority from the 14 May 2026 AGM, and a broker makes trading decisions independently of the company. Lloyds said it would report each week on the daily buyback activity.

Its notice dated 11 September 2026, headed "Transaction in Own Shares", has a table with these columns: date of purchase, aggregate number of shares purchased, highest price, lowest price and volume weighted average price. The notice also links to a schedule of individual trades. That week it was also still buying under an earlier programme, so the notice has two tables. The newer £1 billion programme shows zero shares bought on all five days. A programme of "up to" £1 billion had been announced, but nothing had been spent under it that week.

On the cost side, a company buying back its own shares files form SH03 with Companies House. The form says stamp duty of 0.5% is payable where the consideration is over £1,000, rounded up to the nearest £5. In the illustrative example above, that would be £50,000 on £10 million.

Three common misreadings of a buyback headline

"Buyback" read as "payout to all shareholders". A dividend reaches every holder on the record date. In a buyback, cash only goes to the people who sell.

"Up to £X" read as "will spend £X". "Up to" is a maximum. The Lloyds notice above shows a live programme buying nothing for a week. The purchase notices show what was actually spent. Look for a completion notice too: Lloyds' notice of 25 September 2026 said its £1.75 billion programme had bought 1,712,662,647 shares between 30 January and 24 September 2026.

"Fewer shares" read as "higher price". The worked example shows per-share figures rising when the share count falls. Buyers and sellers set the market price, and nothing about the share count fixes where it goes.

Buyback versus dividend: what is the same and what is different

What is the same: in both cases company cash goes to shareholders, and both are announced through regulatory news.

What is different:

Who gets cash. With a dividend, every holder on the record date. With a buyback, only those who sell.
What non-sellers end up with. With a dividend, cash, or more shares if they reinvest (see dividend reinvestment plans explained). With a buyback, no cash, but a slightly larger share of a company with fewer shares in issue.
Tax. HMRC treats a dividend and a payment for shares bought back by the company under different rules. The HMRC manuals listed in the sources cover this. This post does not give tax advice.

How to read a buyback story: questions to ask

Is the figure an "up to" maximum, and by what date must the programme end?
What is the stated sole purpose?
Will the shares be cancelled or held in treasury?
What do the purchase notices show was actually bought, and at what range of prices?
How big is the programme compared with the company's total shares in issue?
Is the story based on the company's own announcement, or on commentary about it?

Where buyback news appears on MarketFrame

Every morning, MarketFrame reads the UK business news about each FTSE 100 company. It checks which stories are really about that company and scores the coverage on a tone score from -10 (clearly bad news for the company) to +10 (clearly good). It is free to read on the daily FTSE news hub, with an archive from 30 September 2026. Accounts and alerts are not open yet.

A buyback story can lift a company's score because the coverage reads well. You can see how that looks on a company page such as Lloyds Banking Group's news history or the banks sector page. The tone score describes how the news reads. It is not a share-price forecast and says nothing about what the shares will do. For how the index itself is put together, see what is the FTSE 100 index.

Questions people ask

How does a buyback of shares work?

The company pays cash to buy its own shares. Under the Companies Act 2006 the shares are then cancelled or, if bought out of distributable profits, can be held in treasury. A UK listed company announces the programme and then reports its purchases to a regulatory news service no later than the end of the 7th trading session after each purchase.

Are share buybacks a good thing?

There is no single answer. It depends on the price paid, what else the cash could have been used for and the company's own circumstances. This post is general information, not advice on whether a buyback is good for any particular shareholder.

What happens to share prices after a buyback?

Nobody can say in advance. A buyback reduces the number of shares in issue, but the market price is set by buyers and sellers and depends on many things. The tone of news about a buyback is not a share-price forecast.

Is a buyback the same as a dividend?

No. A dividend is paid to everyone who holds the shares on the record date. In a buyback, cash goes only to the shareholders who sell. Shareholders who keep their shares get no cash but end up owning a slightly larger share of a company with fewer shares in issue.

Do I have to sell my shares in a buyback?

No. In an on-market programme the company buys shares on the exchange, and holders who do not want to sell carry on holding. In a tender offer the company invites all holders of a class to offer shares, and each holder decides whether to take part. HMRC's manuals cover how a payment for a company's purchase of its own shares is taxed. The answer depends on the facts, so check HMRC guidance or take professional advice instead of relying on this post.

Sources

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