# Equity research on UK-listed companies: what changes from the US

> UK companies report twice a year, trade in pence, pay 0.5% on every share purchase and are bought under a takeover code with no US equivalent. What changes for an analyst covering London, and how Matterfact's agent keeps the UK's rules current.

London looks like the easiest market for a US model to cover. The filings are in English, the accounting is close enough to US GAAP for most purposes, and many of the largest companies also trade in New York. Most of what differs raises no error. A UK company reports twice a year, not four times. Its shares are priced in pence, and its earnings are often in dollars. Every purchase of its shares pays a 0.5% tax. A bid for it runs under a takeover code with its own deadlines and disclosure rules.

Two of those rules changed in the past year. Since July 13, 2026, the FCA no longer names individual short sellers; it publishes one anonymous total per company. And shares in companies newly listed on the Main Market since November 27, 2025 pay no stamp duty for their first three years, so two stocks on the same exchange can now cost different amounts to buy.

Matterfact's agent works from a written rulebook for the UK, as it does for [Japan, Korea and Taiwan](/blog/japan-korea-taiwan-equity-research): the reporting calendar, units, taxes, takeover rules and sector structures, each dated and checked against current sources, which every analysis loads before it builds a model.

![A quiet research floor high in the City of London, with analysts at walnut desks and the dome of St Paul's Cathedral through the windows](/assets/images/blog/uk-equity-research/research-floor-city.webp)

## TL;DR

- **A UK company reports twice a year, and the stock often moves on a trading update in between.** Half-year and full-year results are required; first- and third-quarter updates are voluntary, unaudited and often revenue only.
- **Prices are in pence, and many of the largest companies report in dollars.** Shell, HSBC, BP, AstraZeneca and Rio Tinto trade in pence and report in US dollars, so a ratio built from the raw numbers is off by more than a hundredfold.
- **Every purchase of a UK share pays 0.5% stamp duty, and dividends pay no withholding tax.** At 400% annual turnover that is 2% of the portfolio a year, more than Korea or Taiwan charge; AIM shares and new listings are exempt.
- **A UK bid runs on its own clock.** A named bidder has 28 days to make a firm offer or walk away, a 30% stake forces a cash offer, and every 1% holder discloses each dealing by 3.30pm the next business day.
- **Banks, insurers, utilities and REITs each need their own approach.** Ring-fenced banks, Lloyd's insurers and networks earning a real return on an indexed asset base have no exact US template.

## Reporting: two results a year, and a trading update in between

UK companies must publish full-year and half-year results. Quarterly reporting was required only from 2007 to 2014. Most large companies still publish a short trading update after the first and third quarters, but it is voluntary, unaudited and often covers revenue alone (Exhibit 1).

Exhibit 1\
**A UK company files two reports a year where a US company files four, and the full-year event comes weeks before the annual report.**

| | United States | United Kingdom |
|---|---|---|
| Where results are published | EDGAR | The Regulatory News Service (RNS), stored on the FCA's National Storage Mechanism; statutory accounts at Companies House |
| Required reports a year | Four: the 10-K and three 10-Qs | Two: full-year and half-year results |
| Between them | Nothing further required | Voluntary first- and third-quarter trading updates: unaudited, usually revenue, a few operating figures and a line on the full year |
| The full-year event | The earnings release, with the 10-K | The preliminary results, weeks before the annual report |
| Large shareholders | 13F each quarter; 13D or 13G from 5% | A notice at 3%, and at each 1% above it, published through RNS |

*Source: FCA Disclosure Guidance and Transparency Rules; Matterfact UK reference*

- **The trading update is often the event.** For half the year it is the only primary source. The line that moves the stock is usually whether management expects the full year to be in line with, ahead of or below market expectations, and many UK companies publish the company-compiled consensus they are measuring against.
- **Fiscal years vary more than in the US or continental Europe.** Banks and insurers mostly close in December and many other companies in March; Diageo closes in June, Compass and Sage in September. Tesco's 2024/25 year was the 52 weeks to February 22, 2025, and its preliminary results came out on April 10.
- **Results arrive at 7am, before London opens.** The stock reacts in London hours, so a reaction window measured on the ADR in New York starts hours late.
- **A trailing twelve months has only two data points.** With half-year reporting, a TTM figure moves twice a year, so the agent compares full year with full year and half with half, and leans on forward consensus rather than quarterly trends.
- **A 53-week year flatters growth.** Retailers that report in 52-week years add a 53rd week every five or six years, which lifts reported annual growth by about 2%. The agent restates to 52 weeks before comparing.

![Bank junction in the City of London, with the Bank of England on the left and the Royal Exchange on the right](/assets/images/blog/uk-equity-research/city-bank-junction.webp)

## Prices are in pence, and many of the largest companies report in dollars

The London Stock Exchange quotes most shares in pence: a price of 2,450 means £24.50. Data feeds tag the currency as GBp or GBX, one letter away from GBP. Many of the largest companies then report in US dollars, so the share price, the dividend and the earnings can sit in three different units (Exhibit 2).

Exhibit 2\
**Five places where a US default goes wrong in London.**

| A US default assumes | What the agent applies in the UK | Where it is filed |
| --- | --- | --- |
| Share prices are in the currency's main unit | **Pence.** Most London prices are in pence. A market value or yield computed from a pence price without dividing by 100 is a hundred times too large. | Price feeds tagged GBp or GBX |
| A company reports in the currency its shares trade in | **Shell, HSBC, BP, AstraZeneca, Rio Tinto.** They report in US dollars and trade in pence. A P/E or a yield needs the price converted to dollars first, at a stated rate. | The reporting currency in the annual report |
| One company, one listed line | **Rio Tinto.** Rio Tinto plc in London and Rio Tinto Limited in Sydney are two listed companies with one set of results. Market value adds both lines, each at its own price. | The dual-listed company structure |
| One ADR is one share | **ADR ratios.** One BP ADR is six ordinary shares, one HSBC ADR five and one Diageo ADR four. AstraZeneca ended its ADR programme in February 2026 and now lists its ordinary shares directly on the NYSE, so its US price history breaks at the switch. | The depositary bank's terms, and the company's NYSE listing notice |
| Growth compares like periods | **52- and 53-week years.** A retailer's 53-week year adds about 2% to reported growth. Growth is restated to 52 weeks before it is compared. | The period length stated in the results |

*Source: London Stock Exchange; company annual reports and depositary terms; Matterfact UK reference, October 2026*

## Every purchase pays 0.5%, and dividends pay nothing at source

The UK charges stamp duty, or its electronic form, stamp duty reserve tax (SDRT), at 0.5% on every purchase of UK shares, and the buyer pays it. It charges no withholding tax on ordinary dividends, so a foreign investor receives a UK dividend in full, where Japan withholds 10% from a US investor and Taiwan 21%.

Because the tax is on purchases, it compounds with turnover faster than any trading tax in Asia. A portfolio that turns over four times a year pays 2% of its value a year in the UK, against 1.2% in Taiwan, 0.8% in Korea and nothing in Japan or the US (Exhibit 3).

Exhibit 3\
**At 400% annual turnover, UK stamp duty costs more than any trading tax in Asia.**

**Trading tax on a portfolio at 400% annual turnover, % of value a year**
Shares held directly, as of October 31, 2026

| Label | Value |
| --- | --- |
| UK | 2% |
| Taiwan | 1.2% |
| Korea | 0.8% |
| Japan | 0% |
| US | 0% |

*Note: UK: 0.5% on each purchase of Main Market shares. Korea and Taiwan tax each sale, at 0.20% and 0.3%. AIM shares, new UK listings and positions held through swaps or CFDs usually pay no UK stamp duty. The US has no tax on share trades. The 400% turnover is an illustration, not an average.*\
*Source: HMRC; national tax rules; Matterfact analysis*[^uk]

**The buyer pays, so a short sale opens free.** Korea and Taiwan tax the seller; the UK taxes the buyer, so the cost lands when a short is covered. Most hedge funds hold UK shares through swaps or contracts for difference for this reason: the dealer on the other side usually claims intermediary relief, and the 0.5% is not paid.

**AIM shares and new listings are exempt.** Shares traded only on AIM have paid no stamp duty since April 2014. Companies newly admitted to the Main Market's Official List on or after November 27, 2025 are exempt for their first three years; a company that was listed before that date is not.

**REITs are the exception on dividends.** A UK REIT's property income distributions are withheld at 20%, rising to 22% from April 2027, and a foreign holder reclaims the difference to its treaty rate, often 15%. Its other dividends are paid gross like any UK company's.

Dividends and buybacks run on their own conventions too (Exhibit 4).

Exhibit 4\
**A UK company usually pays twice a year, goes ex-dividend on a Thursday and pays stamp duty on its own buybacks.**

| | United States | United Kingdom |
|---|---|---|
| How often dividends are paid | Quarterly | Usually twice: an interim and a larger final, approved at the AGM; a few of the largest pay quarterly |
| Ex-dividend day | Any business day | Almost always a Thursday |
| How policy is described | Payout ratio and buyback authorisation | A "progressive" dividend, raised each year; dividend cover is earnings divided by the dividend |
| Shares instead of cash | Rare | Common: a scrip dividend option |
| Tax on buybacks | 1% excise on net repurchases | 0.5% stamp duty on the purchase |
| Buyback authority | Set by the board | Granted by shareholders at each AGM, usually up to 10% of the shares |
| Legal test for paying out | Board discretion and state law | Distributable reserves under the Companies Act |

*Source: London Stock Exchange dividend timetable; Companies Act 2006; Matterfact UK reference*

## A UK bid runs on a clock the US does not have

The Takeover Code, enforced by the Takeover Panel, governs bids for UK public companies, including those on AIM. Its rules set deadlines, force disclosure and fix what a bidder may and may not do (Exhibit 5).

Exhibit 5\
**A UK bid has deadlines, a mandatory-offer trigger and daily public disclosure that a US deal does not.**

| | United States | United Kingdom |
|---|---|---|
| After a leak or an approach | No obligation to name a bidder | The target announces; a named bidder has 28 days to make a firm offer or walk away, and then cannot bid for six months |
| The firm offer | Financing can be conditional | The cash must be certain when the offer is announced, confirmed by the bidder's financial adviser |
| Mandatory bid | None | Crossing 30% of the votes forces a cash offer to all shareholders at the highest price paid in the past 12 months; so does any increase between 30% and 50% |
| Route to 100% | Tender offer, then a merger vote | A scheme of arrangement (75% by value and a majority by number of those voting, then court sanction), or an offer with squeeze-out at 90% |
| Dealing disclosure during a bid | 13D from 5% | Anyone holding 1% discloses every dealing by 3.30pm the next business day |
| Competition and security review | HSR filing required above thresholds; CFIUS | CMA review voluntary; National Security and Investment Act notice required in 17 sectors |

*Source: The Takeover Code; Companies Act 2006; Matterfact UK Takeover Code reference, re-checked October 2026*[^uk]

**The 28-day deadline sets the spread.** Once a possible bidder is named, the Panel normally gives it 28 days to "put up or shut up". Extensions are common when the target's board agrees, and a bidder that walks away is barred for six months, so the deadline and every extension are dates a merger-arb model has to carry.

**Most recommended deals use a scheme.** A scheme of arrangement binds every shareholder once it passes and pays no stamp duty, which on a £10 billion deal saves £50 million. It also gives a holder of just over 25% by value a veto at the court meeting.

**Every 1% holder is visible during a bid.** From the start of an offer period, anyone with 1% or more of the target or a share-paying bidder publishes every dealing, so the arbitrage and activist positioning in a UK deal is public in close to real time.

**Short positions are no longer public by name.** From July 13, 2026, the FCA publishes one anonymous aggregate net short position for each company, built from the private notifications it receives at 0.2% and above. Individual disclosures at 0.5%, which funds used to track who was short, have ended.

**A large acquisition no longer needs a shareholder vote.** Since the Listing Rules were rewritten in July 2024, a listed company buying something worth 25% or more of its size announces it in detail but does not ask shareholders, unless it is a reverse takeover.

![Canary Wharf seen across the River Thames](/assets/images/blog/uk-equity-research/canary-wharf.webp)

## Banks, insurers, utilities and REITs each need their own approach

UK companies report under IFRS, and most also report an adjusted or "underlying" profit that strips out items management considers one-off. The two can differ widely, and the market usually trades on the adjusted figure while the statutory one carries the dividend test. IFRS 16 also puts leases on the balance sheet and lifts EBITDA, so an EV/EBITDA multiple against a US GAAP peer is compared only after the leases are treated the same way on both sides.

- **The "street" earnings figure depends on the sector.** UK banks are judged on underlying earnings and tangible book value, BP on replacement-cost profit, AstraZeneca and GSK on core earnings, REITs on EPRA measures. The surprise is scored against the figure the market uses.
- **A pension surplus is not cash.** UK defined-benefit schemes are large enough to move the enterprise-value bridge at companies such as BT, BAE Systems and Rolls-Royce, and a surplus that trustees control may never be returned to the company. Subtracting it from enterprise value overstates the equity.

The bigger differences are in the kinds of company the UK has (Exhibit 6).

Exhibit 6\
**Six common kinds of UK company, and how each is valued.**

| Kind of company | Examples | How the analysis differs |
|---|---|---|
| Ring-fenced bank | Lloyds, NatWest, Barclays | UK retail deposits sit in a ring-fenced bank with its own capital; net interest income leans on a structural hedge of deposits, whose rollover drives margins for years |
| Lloyd's insurer | Beazley, Hiscox, Lancashire | Underwrites through Lloyd's syndicates; combined ratio, reserve releases and capital held at Lloyd's, which is not free to pay out |
| Life insurer | Legal & General, Aviva, Phoenix | Solvency coverage ratio and cash generation under the UK's own solvency regime, alongside IFRS 17 profit |
| Price-controlled network | National Grid, SSE, Severn Trent, United Utilities | Revenue set by Ofgem or Ofwat in five-year controls; valued on an inflation-indexed regulated asset value; allowed returns are set in real terms, so they cannot be compared with a US nominal allowed ROE; Ofgem's RIIO-3 controls began in April 2026 |
| REIT | Landsec, British Land, Segro | Valued on EPRA net tangible assets rather than US-style FFO; must distribute at least 90% of its tax-exempt property profits, split into withheld and unwithheld dividends |
| Government outsourcer | Serco, Capita, Babcock | Most revenue from UK public-sector contracts; backlog, rebids and contract margins, usually lower than US peers |

*Source: Company reports; Ofgem; Matterfact UK reference, October 2026*

## The rules live in one place, with the date they were checked

The agent reads the market from the ticker: the suffix .L is London. It loads the UK rulebook alongside the industry analysis, and when a target is subject to the Takeover Code, the merger-arbitrage, M&A, LBO and pair-trade analyses all consult the same UK Code reference for its deadlines, thresholds and disclosure rules.

The rulebook needs dating because the rules move. Checking ours against current sources for this article found eight that had changed or were wrong:

- The Listing Rules no longer have a "premium" segment, and large acquisitions no longer need a shareholder vote.
- Short positions are no longer published by name, so a crowding measure that counted the funds on the FCA's register has to be rebuilt on the new aggregate figure.
- Dealing disclosures during a bid are due by 3.30pm, not noon.
- Rule 9 is triggered by any increase in a holding between 30% and 50%, not only by 1% a year.
- A company may hold bought-back shares in treasury without the old 10% cap.
- First- and third-quarter updates are voluntary trading updates; the required "interim management statements" ended in 2014.
- Ofgem's RIIO-3 controls were still described as under review; they began in April 2026.
- AstraZeneca was still listed with a two-for-one ADR after it moved to a direct NYSE listing.

Each is corrected in the one place it lives, and every analysis picks up the change on its next run.

More changes are coming. Short-selling disclosure changed in July, PID withholding rises in April 2027, and UK shares move to settlement one day after the trade, rather than two, from October 11, 2027.

## What to ask of any agent that covers UK companies

Research heads and technology leads can test any agent with five questions:

1. **Which report is this, and what period does it cover?** Full-year, half-year or a trading update; 52 or 53 weeks?
2. **What unit is the price in, and what currency are the earnings in?** Pence or pounds; dollars or sterling?
3. **Which taxes did it apply?** 0.5% on purchases unless the stock is exempt, nothing on ordinary dividends, 20% on REIT property income distributions.
4. **Is the company in an offer period?** Which route, which deadline, and who has disclosed dealings?
5. **What kind of company is it?** A ring-fenced bank, a Lloyd's insurer, a price-controlled network and a REIT each need their own approach.

An agent that cannot answer these is applying US rules to UK companies and hoping they hold. Matterfact's agent applies the UK's own rules alongside the [industry-specific models](/blog/industry-specific-financial-models) it builds for every company.

## FAQ

**Do UK companies report quarterly?**

No. UK listed companies must publish full-year and half-year results. Quarterly reporting was required only from 2007 to 2014. Many large companies still publish voluntary first- and third-quarter trading updates, which are unaudited and often cover revenue only.

**Is there withholding tax on UK dividends?**

Not on ordinary dividends: the UK withholds nothing, so a foreign investor receives the dividend in full. The exception is a UK REIT's property income distributions, which are withheld at 20%, rising to 22% from April 2027; a foreign holder can usually reclaim the difference to its treaty rate.

**What is stamp duty on UK shares?**

A 0.5% tax on purchases of UK shares, paid by the buyer, as stamp duty or stamp duty reserve tax. Shares traded only on AIM are exempt, as are shares of companies newly listed on the Main Market since November 27, 2025, for three years. Positions held through swaps or contracts for difference usually pay none.

**What does "put up or shut up" mean in a UK takeover?**

Once a possible bidder is publicly named, the Takeover Panel normally gives it 28 days to announce a firm offer or say it will not bid. A bidder that walks away cannot bid again for six months. The deadline can be extended, usually at the target board's request.

**Why are London share prices quoted in pence?**

By long-standing convention, the London Stock Exchange quotes most shares in pence, so a price of 2,450 means £24.50. Data feeds tag these prices GBp or GBX. A calculation that treats a pence price as pounds is a hundred times too large.

[^uk]: Checked on October 31, 2026. Dealing disclosures by 3.30pm on the next business day: [The Takeover Panel, Rule 8 summary](https://thetakeoverpanel.org.uk/download-links/rule-8-summary-docx). Rule 9 mandatory offers: [LexisNexis, mandatory offer (Rule 9 bid)](https://www.lexisnexis.com/en-gb/legal/glossary/mandatory-offer-rule-9-bid). Short-selling regime from July 13, 2026: [HSF Kramer, "FCA publishes new rules on short selling"](https://www.hsfkramer.com/notes/corporate/2026-posts/fca-publishes-new-rules-on-short-selling). Stamp duty relief for new listings: [HM Government, SDRT UK listing relief](https://www.gov.uk/government/publications/stamp-duty-reserve-tax-relief-changes/stamp-duty-reserve-tax-uk-listing-relief). UK dividend and PID withholding: [PwC, United Kingdom withholding taxes](https://taxsummaries.pwc.com/United-Kingdom/Corporate/Withholding-taxes); PID rate from April 2027: [Greenberg Traurig, UK REITs and private equity real estate funds](https://www.gtlaw.com/-/media/files/insights/alerts/2026/05/gt-advisory_uk-reits-and-private-equity-real-estate-funds-structuring-considerations.ashx?rev=-1). Listing Rules reform: [Davis Polk, "FCA publishes final UK Listing Rules"](https://www.davispolk.com/insights/client-update/fca-publishes-final-uk-listing-rules). AstraZeneca's NYSE listing: [AstraZeneca, direct listing on the NYSE](https://www.astrazeneca.com/media-centre/press-releases/2026/astrazeneca-to-complete-direct-listing-on-NYSE.html). RIIO-3: [Ofgem, RIIO-3 final determinations](https://www.ofgem.gov.uk/decision/riio-3-final-determinations-electricity-transmission-gas-distribution-and-gas-transmission-sectors). T+1 settlement: [HM Government, move to T+1](https://www.gov.uk/government/news/chancellor-goes-further-and-faster-to-drive-growth-by-speeding-up-securities-trades). Tesco's 2024/25 results: [Tesco, preliminary results 2024/25](https://data.fca.org.uk/artefacts/NSM/RNS/5611605.html).

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