Material non-public information (MNPI) sits at the heart of securities law and fair market regulation. Understanding what it is and how to handle it when you encounter it is essential for anyone working in or around financial markets.
Introduction to Material Non-Public Information (MNPI)
Material non-public information (MNPI) refers to any information about a publicly traded company that has not been released to the general public and that a reasonable investor would consider important enough to influence their trading decisions. In short, it’s insider knowledge that, if acted upon, gives one investor an unfair advantage over everyone else in the market.
The concept of MNPI is central to securities regulation in the United States. The SEC enforces rules designed to ensure that all investors operate on a level playing field. When someone trades on MNPI, they undermine market integrity and erode public trust in financial systems. This is why MNPI is so tightly regulated and why the consequences for misusing it can be severe.
Core Concepts of MNPI
MNPI comprises two distinct but equally important components: materiality and non-public status. Both must be present for information to qualify as MNPI.
Material Information
Information is considered material if there is a substantial likelihood that a reasonable investor would view it as significantly altering the total mix of available information when making an investment decision. Put simply, if learning the information would likely cause an investor to buy, sell, or hold a security differently, it’s material.
Material information typically includes:
- Changes in earnings or revenue projections
- Pending mergers, acquisitions, or divestitures
- Major executive leadership changes
- Significant litigation outcomes
- New product launches or regulatory approvals
- Changes in dividend policy
The SEC does not provide a definitive checklist of what counts as material — it is assessed on a case-by-case basis, with the central question always being whether the information would meaningfully affect an investor’s decision.
Non-Public Information
Information is non-public when it has not been broadly disseminated to the investing public through recognized channels. Once a company files a report with the SEC, issues a press release, or discloses information on an earnings call, that information generally transitions from non-public to public.
Information does not become public simply because a few people know it. If a company’s CFO tells a friend about an upcoming earnings miss before the official announcement, that information is still non-public, even though it is no longer a secret shared by just one person. For information to be considered public, it must have been released through channels that give all investors a reasonable opportunity to act on it.
The Difference Between Material and Non-Public Information
While the two concepts are intertwined in MNPI, they are legally distinct. Material information concerns the significance of the information, whether it would move a reasonable investor to act. Non-public information concerns its accessibility: whether the general investing public has had a fair chance to learn it and respond.
Both elements must be present simultaneously for information to be classified as MNPI. Highly significant information already publicly disclosed is not MNPI. Equally, obscure, non-material information that happens to be private is also not MNPI.
Examples of Material Non-Public Information
The following are common documents and scenarios that are likely to constitute MNPI:
- Unannounced earnings reports or estimates — Internal projections showing a company will significantly beat or miss analyst expectations before the official release.
- Merger and acquisition agreements — Draft contracts or board-level discussions about an upcoming deal that has not been publicly announced.
- Dividend announcements — Decisions to initiate, increase, cut, or suspend a dividend before the official press release.
- Regulatory decisions — Knowledge that a drug has received (or been denied) FDA approval before public disclosure.
- Executive changes — Advance knowledge of a CEO resignation, firing, or hire before it is announced.
- Litigation outcomes — Pre-announcement knowledge of a major lawsuit settlement or adverse judgment.
- Sales and revenue results — Internal sales data showing results materially different from public guidance.
- Cybersecurity incidents — Awareness of a significant data breach before it is publicly disclosed.
This list is illustrative, not exhaustive. Any information that a reasonable investor would likely find significant — and that has not yet been made public — can qualify as MNPI.
Legal Implications of MNPI
Insider Trading Laws
Trading on MNPI is the defining element of insider trading, which is illegal under U.S. federal securities law. The SEC enforces insider trading prohibitions primarily through the Securities Exchange Act of 1934 and Rule 10b-5, which broadly prohibit fraud and deception in connection with the purchase or sale of securities.
Critically, you do not need to be a company executive or board member to violate insider trading laws. The misappropriation theory holds that anyone who trades on material non-public information obtained through a breach of a duty of trust or confidence can be held liable — including lawyers, accountants, financial advisors, and even friends or family members who receive tips from insiders.
Is it legal to trade stock if you have material non-public information? No. Trading on MNPI, or tipping someone else who then trades, is illegal, regardless of how you obtained the information. The fact that you did not work for the company is not a defense if you knew the information was confidential and non-public.
Consequences of Violating MNPI Regulations
The penalties for insider trading are substantial and can include both civil and criminal consequences:
- Civil penalties — The SEC can pursue disgorgement of profits plus interest, as well as civil fines of up to three times the profit gained or loss avoided.
- Criminal prosecution — The Department of Justice can bring criminal charges, with penalties including fines of up to $5 million and up to 20 years in prison for individuals.
- Reputational damage — Enforcement actions are public, and the professional and personal reputations of those involved are often permanently damaged.
- Industry bars — Individuals found liable may be barred from serving as officers or directors of public companies.
Common Mistakes and Tips Regarding MNPI
Common misconceptions:
- “I didn’t trade myself, so I’m not liable.” Tipping someone else who then trades on MNPI can expose the tipper to the same liability as the trader.
- “The information was already floating around.” Widespread rumors do not make information public. Only formal, broad dissemination through recognized channels does.
- “It only applies to public companies.” While MNPI most directly applies to publicly traded securities, private company information can become relevant when a private company is involved in a transaction with a public company.
Best practices for compliance:
- Maintain clear information barriers (commonly called “Chinese walls”) between departments that handle sensitive data and those involved in trading.
- Implement and follow a pre-clearance process before trading in any security about which employees might have non-public information.
- Train employees regularly on MNPI policies and document compliance efforts.
- When in doubt, do not trade — and consult your compliance team or legal counsel.
Frequently Asked Questions
What is considered material non-public information (MNPI)? MNPI is any information that has not been publicly released and that a reasonable investor would likely consider significant enough to influence a decision to buy, sell, or hold a security.
What is the difference between material and non-public information? Material information refers to how significant the information is to investors. Non-public information refers to whether the information has been broadly disseminated. Both qualities must exist together for information to be classified as MNPI.
Which documents are likely to be considered MNPI? Unannounced earnings reports, merger agreements, dividend decisions, regulatory approvals, executive change notifications, litigation outcomes, and internal sales results are all commonly considered MNPI.
Is it legal to trade stock if you have non-public material information? No. Trading on MNPI is illegal under U.S. securities law and constitutes insider trading, regardless of whether you are a company insider or obtained the information secondhand.