The Ultimate Guide to Reading Company Announcements (RNS)
Most of the news that moves a UK share price comes from the company itself, as a regulated announcement published at 7am before the market opens. A trading update, a profit warning, a takeover bid, a director buying shares: it all arrives this way first, and it is free to read. A private investor can read the news at the same moment as a fund manager in the City. But the announcements are written to meet the rules, not to explain the news, and the market is often slow to work out what they mean. That is the opportunity. When we studied UK announcements from 2025 and 2026, some kinds of news were followed by shares beating the market for months, and others by shares falling behind it. This series shows you how to read the announcements, which ones really matter, and how to act on them.
What the Regulatory News Service is
Run by the London Stock Exchange, it is the best known of the services UK-listed companies use to publish their official news, and the place a company's news appears first - before anyone can make a comment on it. Investors often call any regulatory announcement an "RNS", whichever service carried it. The announcements are free to read, on LSEG’s own website or on services that publish them in real time such as Stockopedia.com.
Most are published at 7am, before the market opens at 8am. Between them, they carry the full range of company news: trading statements and results, takeover approaches, contract wins, fundraisings, and directors buying and selling shares. Each type has its own form and its own language, and each tells you something different.
Behind it sits a legal duty. Under the UK Market Abuse Regulation (MAR), a listed company must announce anything likely to move its share price as soon as possible - this levels the playing field so that all investors hear at once and nobody can trade on the news first. It’s also why some announcements come out during the trading day when a company can no longer wait on distributing material news.
Why the RNS matters to private investors
The RNS is the company speaking for itself, before any analyst, journalist or bulletin board has had a say. In the UK this matters more than in other markets - a UK company only has to publish full audited financial figures twice a year, in contrast to the USA where it’s quarterly. In between, the company keeps the market informed with news on contract updates and trading statements - which provide signals investors can learn to read.
Reading RNS is one of the few habits where a savvy private investor can gain an edge on professionals. Everyone sees the announcement at the same moment, but many institutions are slow to act. Brokers may upgrade or downgrade their numbers only in steps, and institutions can only deal their size through time. And on news days many investors make mistakes: banking gains too early after good news, and holding on to losers after bad.
So in spite of news day price movements often being sharp, share prices take months to catch up with reality and private investors that act appropriately can place themselves early in the trend - taking advantage of what academics call post-earnings announcement drift. The drift is strongest in smaller, less-traded, and often neglected shares. Those are the shares big funds struggle to buy in any size, and that is where a private investor, dealing in small amounts, has the advantage.
The catch is that announcements are written for the rules, not for you. A profit warning rarely calls itself one; it usually arrives headed "Trading Update". A director's tax sale goes out under the same headline as a director spending £170,000 of their own money. The key message often sits in a footnote, in the outlook at the bottom, or in a single line of a form.
Reading RNS well is a skill, and that’s what this series aims to teach.
How to act on an RNS: what our research found
We have tested what happens to share prices after each type of announcement, using our own announcement data and daily share prices, measured against the FTSE All-Share.
The series goes into the details but here are some highlights:
Strong good news has tended to keep running. When we tracked every UK trading statement and set of results, the stronger the word in front of "ahead of expectations", the better the shares did in the weeks afterwards. A share price jump on the day can tell you even more. Shares that rose 15% or more on an "ahead" statement went on to beat the market by a further 9% over the next six months. And good news tends to come in streaks. Continuing to hold, and buying on good news pays.
Bad news has tended to keep falling. Profit warnings run the same way in reverse. Across the 208 warnings our analysts flagged from January 2025, the shares fell 13.5% on the day on average. But 40% of the fall over the next nine months came after that day, and a year on only about one in nine was back at its pre-warning level against the market. Holding on has carried a real opportunity cost, and on the evidence, selling has been the better choice.
A takeover bid pays out on the day. The shares we tracked typically jumped 20% on the day a bid became public. Where it began with a firm offer, they added only about 2% more before holders were paid. When a bid failed, most of the premium went, and nearly half the shares were below where they started six months later. Once a firm offer is in, most of the reward is already in the price.
A director buying is worth noticing, but not worth copying on its own. UK studies going back to the late 1980s found that open-market buys by directors were followed by better returns, and that sales told investors much less. The signal was strongest when several directors bought at once and, in our own study, after the largest buys for the size of the company and buys by the chief executive or finance director. But the edge is small - so only use as a confirming factor.
The real job is deciding what to do when news lands on a share you hold. This is hard, because your instincts want to get involved. After good news, the bias is to bank the gain. After a warning, it is to wait for a bounce, or to buy more because the shares look cheap. In a bid, it is to hold out for more. On our evidence, each of these has tended to cost investors money.
Every guide in this series has a section on the instinct its news brings out, and ends with what we would weigh before acting.
The guides in this series
Each guide stands on its own:
How to read a UK trading statement is the place to begin. A trading statement is the company's own account of how its year is going, published months before the full figures. The guide shows the shape they share, the difference between grading the year against "expectations" and giving guidance, what "market expectations" really means, and the order to read one in.
What to do when a company beats expectations is for the morning the news is good. It explains why good news keeps working its way into the price, how to tell a strong beat from a weak one, and whether you've already missed the move. The key message: a big jump on the day is often the start of the move, not the end of it.
What to do on a profit warning is for the morning it isn't. It shows why most of the fall comes on the day, why more usually follows, and the four instincts that will pull you the wrong way. The key message: sell and put the money somewhere better, unless a genuinely high-quality company has been hit by a clear one-off.
How to read a company's annual and interim results covers the full accounts a company publishes twice a year. By results day the headline has often been given away in a trading update, so the guide goes to where the news sits: the profit after every cost, the cash, the dividend and the outlook. Each is read with a real set of results, the way our analysts read them in the daily report. The key message: ask what the results tell you that the last trading update didn't.
How to react to a contract win shows how to size a contract against the company's revenue and profit, read the headline value, and tell the rare win that changes the forecasts from the routine one already in them. The key message: most contract wins are business as usual, but losing a big customer hurts far more than winning one helps.
What to do on a takeover bid takes you through the stages of a bid, how to check the premium, and what a failed bid has cost holders, so you can decide whether to stick or twist. The key message: once a firm, recommended cash offer is in, most of the reward is already in the price.
How to interpret directors' dealings shows how to sort pay, tax and paperwork from real decisions, and why a buy tells you more than a sale. The key message: a director's buy is a reason to look harder, not a reason to act.
We also provide some articles in this series to help investors understand the UK market environment:
Understanding UK Reporting Seasons. An overview article to help you understand which companies report when through a typical calendar year. Understanding the seasonal swells of trading statements and result statements can help you identify when you should put your full attention on the market and when it's okay to stand aside.
Understanding the Main Market, AIM Market, and Aquis. Shares may trade on different exchanges with different rules and regulations. Understanding what these are and what they mean is essential for the savvy private investor who wants to manage risk and find the best opportunities.
We will be adding further articles to this series in future.
Three things to take away
Read the RNS yourself, and read past the headline. It's free, it's first, and the key message is often in a footnote, the outlook or one line of a form.
Follow the news that changes expectations. Strongly worded beats and big jumps have tended to keep running, and warnings to keep falling. In-line news and a firm bid leave the least to play for.
Treat our evidence as the odds, not a forecast. Our research statistics describe averages across many shares. Use them to decide where to look and what to weigh, and set it against everything else you know before you act.
From the Daily Stock Market Report. Every weekday morning Graham Neary and the team read the RNS as it lands, pick out the announcements that matter and set out what has really changed. Read today's report · Sign up to our newsletters