Yes, insider trading is prosecuted as fraud under federal securities law. There is no standalone federal statute that names the offense; instead, Section 10(b) of the Securities Exchange Act of 1934 and SEC Rule 10b-5 — the general anti-fraud provisions — are used to treat trading on confidential corporate information as a deceptive act. Convictions can carry up to 20 years in prison and fines reaching $5 million per person, with civil penalties on top of that.
Why the Law Treats It as Fraud
Section 10(b) makes it illegal to use any deceptive scheme in connection with buying or selling securities. Rule 10b-5, the SEC regulation that enforces Section 10(b), prohibits three things: using any scheme to defraud, making false statements or omitting material facts, and engaging in any practice that operates as a fraud on another person in a securities transaction.1Legal Information Institute (LII) at Cornell Law School. Rule 10b-5
Neither provision mentions insider trading. Congress has never passed a dedicated insider trading statute. Courts and the SEC have spent decades fitting the conduct into these broader anti-fraud rules, and the logic is this: when someone trades while secretly holding information that would move the stock price, their silence is treated as a deceptive omission. Staying quiet, when honesty was required, is the fraud.2Legal Information Institute (LII) at Cornell Law School. Securities Exchange Act of 1934
Three enforcement tracks flow from the same foundation. The SEC brings civil cases seeking penalties and disgorgement. The Department of Justice can pursue criminal charges. Investors who were harmed can file private lawsuits. All three rest on the fraud theory.
The Two Legal Theories That Make a Trade Fraudulent
Because the fraud label depends on deception, prosecutors need to identify who was deceived. Two different theories answer that question, and together they cover almost every scenario.
Classical Theory: Insiders Who Trade Their Own Company’s Stock
The oldest theory targets corporate insiders — officers, directors, and employees — who trade their own company’s stock based on confidential information. These individuals owe a fiduciary duty to shareholders. When they trade without disclosing what they know, they breach that duty, and the breach is what turns an ordinary trade into securities fraud.3Cornell Law School. Classical Theory of Insider Trading
A CEO who sells shares before announcing a failed product launch, or a CFO who buys ahead of a surprise earnings beat, fits the pattern exactly. The insider had a choice between disclosing the information and not trading, and chose neither.
The theory also reaches outside professionals who gain access to confidential information through their work for the company. Attorneys, investment bankers, accountants, and consultants can be treated as temporary or constructive insiders, taking on the same fiduciary obligations as employees for the duration of their engagement.4U.S. Securities and Exchange Commission. Selective Disclosure and Insider Trading An investment banker advising on a merger cannot trade the target’s stock any more than the target’s own CEO could.
Misappropriation Theory: Outsiders Who Steal Confidential Information
The classical theory has a gap. It only reaches people who owe duties to the traded company’s shareholders. What about a lawyer at a firm representing the acquiring side of a takeover, or a printing press worker who reads a draft tender offer? The misappropriation theory fills that gap.
Under this theory, the fraud is committed against the source of the information, not against the shareholders of the traded company. A person who receives confidential information through a relationship of trust and secretly uses it to trade commits fraud against whoever entrusted them with it. They pretended to be loyal while pocketing the profits.
The Supreme Court endorsed this theory in United States v. O’Hagan, a case involving a partner at a Minneapolis law firm who learned his firm’s client was planning a tender offer, then bought options in the target company and made over $4 million.5Cornell Law Institute. United States v James Herman O’Hagan The Court held O’Hagan defrauded his law firm and its client by misappropriating information entrusted to him and using it for personal trading.
This theory matters because it dramatically expands who can be charged. You do not need to be a corporate officer or have any relationship to the traded company. If you received confidential information through any trust-based relationship and traded on it secretly, that is enough.
Tippers and Tippees: How the Fraud Spreads
Insider trading law does not only reach the person who places the trade. It also reaches the chain of information sharing: the insider who leaks the tip and the person who receives it and trades.
The Supreme Court set the framework in Dirks v. SEC (1983). A tippee can be held liable only if two things are true. The tipper must have breached a fiduciary duty by sharing the information, and the tippee must have known, or had reason to know, about that breach. A tippee who genuinely believed the information was public, or who had no reason to suspect a breach, falls outside the fraud framework.
Dirks also answered when a tipper breaches a duty, through what became known as the personal benefit test. The tipper must receive some personal benefit from sharing the information, though it does not have to be cash. The Court said sharing confidential information with a “trading relative or friend” counts, because the tipper gets the personal satisfaction of giving a valuable gift.
The Supreme Court reinforced this in Salman v. United States (2016), holding that a tipper who gives inside information to a close family member does not need to receive any tangible reward. The gift itself is the personal benefit. In practice, casual information sharing at family dinners or between close friends can trigger full liability for both sides, as long as the tippee knew or should have known the information came from a breach of duty.
What the Information and the Trader Must Look Like
Not every trade made with an information edge is fraud. The information must be both material and non-public, and the trader must have acted with a culpable state of mind.
Material and Non-Public
Information is material if a reasonable investor would consider it important when deciding whether to buy or sell. The Supreme Court’s formulation asks whether there is a substantial likelihood the information would significantly alter the total mix of available data. There is no bright-line list, but certain categories almost always qualify: pending mergers or acquisitions, major litigation, unexpected earnings results, significant leadership changes, and regulatory actions that could reshape the company’s prospects.
The information must also be non-public, meaning it has not been broadly disseminated through press releases, SEC filings, or other recognized channels. Sharing information with a handful of analysts does not make it public. Even after a company issues a press release, the information is not instantly public for trading purposes — the market needs a reasonable window to receive and process the news, typically at least a full trading session.
Intent
Because insider trading is prosecuted as fraud, the government must prove the defendant’s mental state, called scienter. Accidental trading on information you did not realize was confidential is not fraud. Prosecutors must show intent to deceive, or at least a reckless disregard for whether the information was inside information. Most federal appeals courts accept severe recklessness, provided it has a subjective dimension, such as deliberately avoiding the truth about where the information came from.
The SEC also settled a related question in Rule 10b5-1: if you traded while aware of material non-public information, you traded “on the basis of” it, even if you cannot be shown to have consciously used it in the decision.6SEC.gov. Selective Disclosure and Insider Trading The reasoning is practical: a trader who holds inside information at the moment of trading inevitably uses it. To offset the harshness of that standard, the SEC built in affirmative defenses, most importantly the pre-arranged trading plan.7eCFR. 17 CFR 240.10b5-1 – Trading on the Basis of Material Nonpublic Information in Insider Trading Cases
Penalties for a Fraud Conviction
Insider trading violations carry both criminal and civil consequences, and in serious cases the government pursues both at once.
Criminal
Under 15 U.S.C. § 78ff, anyone who willfully violates the Securities Exchange Act’s anti-fraud rules faces up to 20 years in prison and a fine of up to $5 million. For entities, the maximum fine rises to $25 million.8Office of the Law Revision Counsel. 15 USC 78ff Penalties The statute includes one narrow escape: a person cannot be imprisoned for violating a rule if they prove they had no knowledge the rule existed. In practice this rarely succeeds in insider trading cases, where awareness of confidentiality is usually central to the government’s case.
Civil
The SEC pursues civil enforcement independently of any criminal case. Under 15 U.S.C. § 78u-1, the SEC can seek a civil penalty of up to three times the profit gained or loss avoided, on top of disgorgement of the actual profits.9Office of the Law Revision Counsel. 15 USC 78u-1 – Civil Penalties for Insider Trading A trader who made $1 million illegally could face disgorgement of $1 million plus a penalty of up to $3 million.
People who controlled the insider trader, such as supervisors who failed to prevent the trading, face their own penalties: the greater of $1,000,000 or three times the controlled person’s profit.
Private Lawsuits
Investors who traded at the same time as the insider trader can also sue for damages under Section 20A of the Exchange Act. Total damages in these private actions cannot exceed the insider’s profit gained or loss avoided, and any amount already paid in SEC disgorgement offsets the private damages.10Office of the Law Revision Counsel. 15 US Code 78t-1 – Liability to Contemporaneous Traders
The Main Shield: Rule 10b5-1 Trading Plans
Corporate insiders who routinely possess confidential information need some lawful way to sell their own stock. Rule 10b5-1 trading plans provide it. If an insider sets up a written plan to buy or sell at a time when they do not possess material non-public information, trades executed under that plan are protected by an affirmative defense, even if the insider later learns confidential information before a scheduled trade.
The SEC tightened these plans in amendments that took effect in 2023. Directors and officers must now observe a cooling-off period before trading — the later of 90 days after adopting or modifying the plan, or two business days after the company discloses financial results for the quarter of adoption, capped at 120 days.11SEC.gov. Rule 10b5-1 Insider Trading Arrangements and Related Disclosure Plans must be adopted in good faith and not as part of a scheme to evade the rules.7eCFR. 17 CFR 240.10b5-1 – Trading on the Basis of Material Nonpublic Information in Insider Trading Cases Directors and officers must certify in writing, at adoption, that they are not aware of material non-public information. A person can only use the defense for one single-trade plan in any twelve-month period, and overlapping plans for the same class of securities are restricted.12U.S. Securities and Exchange Commission. SEC Adopts Amendments to Modernize Rule 10b5-1 Insider Trading Plans and Related Disclosures
These changes addressed what the SEC viewed as widespread abuse: insiders adopting plans just before announcements, modifying plans to time trades, or running overlapping plans to cherry-pick favorable execution dates.
How Long the Government Has to Charge
Time limits depend on whether the action is civil or criminal. The SEC must bring civil penalty actions within five years of when the claim first arose.13Office of the Law Revision Counsel. 28 US Code 2462 – Time for Commencing Proceedings Criminal securities fraud prosecutions also generally carry a five-year limitations period, though schemes affecting financial institutions can extend to ten years.
These deadlines can be more generous in practice than they look. Schemes that unfold over months or years may reset the clock with each new trade, and concealment can delay when the clock starts. Five years from discovery of a complex insider trading ring can mean prosecution arriving a decade after the first trade.