The Regulatory News Service, or RNS, disseminates regulatory and non-regulatory information on behalf of UK businesses and publicly traded companies. The RNS, which is part of the London Stock Exchange (LSE), provides businesses with information that can assist them in meeting their disclosure obligations.
The RNS replaced the Company News Service, which published full-text reports and was officially launched in 1988. Since then, the RNS has served as the official news outlet for the London stock exchange's regulatory and financial announcements for both UK-listed and AIM-listed companies.

Since its inception, the RNS has grown to become a globally recognized source of regulatory news. This information can be very useful in assisting traders and investors in making informed decisions about the shares of UK companies. This is because the RNS information is typically published on over two million professional terminals, databases, and financial websites worldwide.

A Regulatory News Service (RNS) is a system used primarily in the financial industry to distribute regulatory and compliance information to the public. It ensures that companies listed on stock exchanges comply with their regulatory disclosure obligations by disseminating important corporate news, such as financial results, significant transactions, management changes, and other material events that could impact a company's stock price. The RNS helps maintain market transparency and fairness by providing timely and accurate information to investors and stakeholders. In the UK, for instance, the London Stock Exchange operates its own RNS, playing a critical role in upholding the integrity of the financial markets.