M&E Maintenance Solutions Limited

What Is Inside Information? Definition & UK Law 2026

what is inside information

When a company’s results, takeover talks or planned dividend are not public, a person with access to those details may face strict rules about how they use or share them. If you are asking what is inside information, the answer depends on context: everyday speech means a tip or useful private knowledge, while UK financial law sets a precise test.

Key Takeaways

  • Inside information covers confidential company details such as unpublished results, takeover plans or dividend decisions.
  • Everyday use of the term refers to any private tip, but UK financial law applies a strict legal test to define it.
  • Anyone with access to non-public company details must follow clear rules on how they use or share that knowledge.
  • The legal definition matters because breaching it can lead to serious consequences under UK market abuse regulations.

That distinction matters. Simply receiving confidential information is not automatically a crime, but trading on it, encouraging someone else to trade or unlawfully disclosing it can carry serious consequences. Here is how the legal definition works and where the line is drawn.

What Is Inside Information? A Plain-English Definition

In everyday language, inside information is a tip, the lowdown or another piece of knowledge not widely available. Under UK Market Abuse Regulation (UK MAR), it means precise, non-public information relating directly or indirectly to an issuer or financial instrument which, if made public, would likely have a significant effect on the price. The legal test is narrower than the everyday expression.

People may describe a private update about a business, a team or an event as “inside information” without making a legal judgment. The phrase can simply mean that someone has a useful tip before others do. In regulated financial markets, though, a hunch, rumour or interesting detail does not automatically qualify. The facts must meet the statutory criteria, and the information must concern a financial instrument or its issuer.

The UK MAR Article 7 Test: Precise, Not Public, Price-Sensitive

UK MAR Article 7 sets four cumulative criteria. The information must be precise, relate directly or indirectly to an issuer or financial instrument, not be public, and be information that a reasonable investor would likely use as part of an investment decision because disclosure could significantly affect price. All four conditions matter. A confidential detail with no likely price effect may fail the test; a market-moving fact already publicly disclosed may fail the non-public criterion.

Inside Information vs Insider Information vs Insider Dealing

“Inside information” is the defined term used in UK MAR. “Insider information” is a common-language variant, not a separate category under Article 7. Insider dealing describes certain conduct involving that information, rather than the information itself. Keeping those terms distinct helps prevent a casual “tip” from being confused with a finding of market abuse or a criminal offence.

Term Meaning UK legal context
Inside information Everyday: a tip or private lowdown. Legal: information meeting the Article 7 criteria. Defined under UK MAR Article 7.
Insider information A commonly used alternative phrase. Not a distinct defined category in Article 7.
Insider dealing Trading or other prohibited conduct involving inside information.

Real Examples of Inside Information and When It Becomes Illegal

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Five Worked Examples: Results, Takeovers, Leadership and Dividends

Whether information qualifies depends on its precision, confidentiality and likely effect on price. These examples show situations that may meet the UK MAR test, depending on the facts:

  1. Unannounced results: Final figures show a substantial earnings shortfall before the company publishes them.
  2. Merger or acquisition talks: Negotiations have reached a sufficiently specific stage and could affect the share price if disclosed.
  3. A CEO departure: A confirmed, undisclosed resignation may be price-sensitive where the executive’s role materially affects the issuer.
  4. A dividend change: A board decision to cut or cancel a dividend may influence investors’ valuation.
  5. A major contract loss: The issuer has reliable confirmation that a significant customer will not renew, before the market is told.

Possession vs Misuse: Insider Dealing Under the Criminal Justice Act 1993

Possessing confidential information is not, by itself, proof of an offence. The risk arises from conduct. UK MAR prohibits insider dealing, recommending or inducing another person to deal, and unlawful disclosure of inside information. Whether a particular case meets the legal test depends on evidence and circumstances.

Penalties Summary: Civil Sanctions and Criminal Offences

The consequences can extend beyond reputational damage. The Financial Conduct Authority can impose civil sanctions for market abuse under UK MAR, and it has levied fines amounting to tens of millions of pounds in recent years.

  • UK MAR: Prohibitions and civil enforcement apply to insider dealing and related market abuse.

Insider Lists and Disclosure Duties: UK Compliance in Practice

Who Must Keep an Insider List Under MAR Article 18

UK MAR Article 18 requires issuers, and people acting on their behalf or account, to keep an insider list identifying everyone with access to inside information. That can include employees, directors, advisers and external specialists, depending on who has access to the specific information. A person does not need to be a company director to appear on the list.

Record each person’s identity, the reason for their inclusion, the date and time they gained access, and when access ended. Update the list promptly when circumstances change, and retain it for at least five years after it is drawn up or updated. This is not an administrative exercise to complete after an announcement: an accurate, time-stamped record helps demonstrate that access was controlled.

Disclosing or Delaying: MAR Article 17 and Legitimate Delay

Under UK MAR Article 17, an issuer must disclose inside information to the public as soon as possible. A delay may be permitted if immediate disclosure would prejudice a legitimate interest, the delay is unlikely to mislead the public, and confidentiality can be maintained. These conditions must all be met; a preference to manage headlines or wait for a convenient announcement time is not enough.

Before delaying, document the decision, the legitimate interest at risk, how the other conditions are satisfied, and who authorised the decision. If confidentiality is lost, such as through a leak or rumour that is sufficiently accurate, the issuer may need to disclose the information promptly. Once delayed information is announced, the issuer must notify the Financial Conduct Authority and provide a written explanation for the delay if the FCA requests one.

Practical Compliance Checklist for Issuers and Their Advisers

Good compliance depends on controls that work under pressure, not a policy kept in a folder. Agree in advance who assesses whether information meets the MAR test, who can authorise disclosure or delay, and how advisers report changes in access. Use the following checks when a sensitive matter emerges:

  • Identify access: Record everyone who receives the information, including external advisers, and log when access begins and ends.
  • Control circulation: Share only with people who need the information, using secure channels and clear confidentiality instructions.
  • Assess disclosure: Record the Article 17 decision, its timing and the evidence supporting any delay.
  • Monitor confidentiality: Assign responsibility for tracking leaks, unusual market activity and changes that could require disclosure.
  • Review records: Check insider lists for accuracy, update them promptly and ensure staff know how to escalate concerns.

For issuers and advisers, a clear audit trail is practical protection. If a decision is later examined, contemporaneous records show who knew what, when they knew it, and how the organisation responded.

Beyond the Markets: Inside Information in Sport Betting and Everyday Language

The Gambling Commission's Position on Misuse of Inside Information in Betting

Private information can matter in betting as well as financial markets. A person with confidential knowledge about a sporting event, such as a player’s fitness or a planned team change, may have an unfair advantage if they use it to place a bet or pass it to someone else. Its focus is misuse: having access to information is not, on its own, the same as using it improperly. For clubs, athletes and staff, clear confidentiality rules and a route to report suspicious betting activity help protect sporting integrity.

Synonyms Explained: Lowdown, Tip, Dope, Scoop, Skinny

Outside a legal or regulatory context, the phrase often means useful information that has not yet reached everyone. “Lowdown” suggests the full story; a “tip” is a lead or piece of advice; and “scoop” usually means news obtained ahead of wider publication. “Dope” and “skinny” are informal terms for information or the inside story. These words can fit a conversation or crossword clue, but they do not establish that information meets the legal test in UK MAR. Context determines whether a synonym is merely casual language or a description of confidential facts.

Crossword Answers: LOWDOWN (7), TIP (3), DOPE (4), SCOOP (5)

For a crossword, the answer depends on the number of letters and the crossing entries. LOWDOWN is a common seven-letter fit; the shorter alternatives may suit a different grid. These are everyday-language answers, not legal classifications.

Answer Letters Typical sense
LOWDOWN 7 The full story or private details
TIP 3 A useful piece of information
DOPE 4 Informal word for information
SCOOP 5 News obtained before wider release

Confidentiality on Client Sites: A Facilities Management Perspective

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How Commercially Sensitive Building Data Compares to Financial Inside Information

On a client site, engineers may encounter floor plans, access arrangements, security systems, plant locations, operating schedules or contract terms. That information can be sensitive and must be handled carefully, but confidentiality alone does not make it inside information under UK MAR. The financial definition has specific requirements, including a connection to an issuer or financial instrument and likely price significance. Site data can still create security, safety or commercial risks if disclosed, so access should be limited to people who need it to complete their work.

The MEMS Standard: Handling Client Information Right First Time

At MEMS, our engineers work in occupied commercial buildings where trust is part of doing the job properly. We expect information to remain within the authorised project team, records to be stored and shared through approved channels, and concerns about accidental disclosure to be raised promptly. That discipline protects clients’ premises and operations, just as sound maintenance protects their equipment. If you are asking what is inside information in a facilities setting, the practical answer is to identify what could expose a client, restrict access and follow the agreed confidentiality procedure.

Frequently Asked Questions About Inside Information

Is it “inside information” or “insider information”? In UK MAR, “inside information” is the defined term. “Insider information” is often used in everyday speech, but it is not a separate Article 7 category.

Is insider information illegal? Possession alone is not automatically unlawful.

What is an insider list? Under UK MAR Article 18, it is a record of people with access to inside information, maintained by issuers and people acting on their behalf or account.

Frequently Asked Questions

Is it illegal to trade on insider information?

Yes, trading on insider information is illegal in the UK when the details meet the UK MAR definition of inside information.

What does 'insider information' mean?

'Insider information' is a common-language variant of 'inside information', which under UK MAR means precise, non-public information relating to an issuer or financial instrument that would likely have a significant effect on the price if made public. It is not a separate legal category under Article 7.

What counts as an insider?

An insider is anyone with access to inside information, not just directors or senior executives. Employees, advisers and external specialists can all qualify, which is why issuers must keep insider lists under UK MAR Article 18 recording who had access and when.

What are examples of insider information?

Common examples include unannounced earnings figures showing a substantial shortfall, merger or acquisition talks at a sufficiently advanced stage, a confirmed but undisclosed CEO departure, a board decision to cut a dividend, and confirmation that a major customer will not renew a contract.

What is the legal test for inside information under UK MAR?

The UK MAR Article 7 test has four cumulative criteria: the information must be precise, relate directly or indirectly to an issuer or financial instrument, not be public, and be something a reasonable investor would likely use in an investment decision because disclosure could significantly affect the price.

Is simply receiving inside information a criminal offence?

No, possessing confidential information is not by itself proof of an offence. The legal risk arises from conduct, such as trading while in possession of the information, encouraging someone else to deal, or unlawfully disclosing the details to others.

Who has to keep an insider list and for how long?

Issuers, and people acting on their behalf or account, must keep an insider list under UK MAR Article 18. The list must record each person's identity, the reason for their inclusion, when access began and ended, and must be retained for at least five years.

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About Stuart Butcher

Founder & Managing Director | M&E Maintenance Solutions

Stuart Butcher is the Founder and Managing Director of M&E Maintenance Solutions. A "boots-on-the-ground" leader, Stuart began his career as an apprentice combustion engineer, spending over 24 years mastering the trade before building a premier maintenance firm. He operates at the intersection of technical engineering precision and commercial asset management.

Driven by the philosophy that maintenance is cheaper than repair, Stuart works with Facility Managers and Building Owners across Birmingham, the Midlands, and the UK to ensure 24/7/365 compliance and uptime. He established M&E Maintenance Solutions to provide the technical capability of a large corporate provider while maintaining the personal accountability of a family-run business.

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Last reviewed: September 30, 2026 by the M&E Maintenance Solutions Limited Team

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