
Insider trading is the buying or selling of a security while in possession of non-public information, giving the trader an unfair advantage. In the United States, corporate officers, key employees, directors, or significant shareholders must report their trades to the regulator, usually within a few business days. Insiders are required to file Form 4 with the U.S. Securities and Exchange Commission (SEC) when buying or selling shares of their own companies. While legal insider trading does occur, such as when a CEO buys back shares of their company, illegal insider trading is the infamous use of non-public material information for profit. The SEC actively investigates and prosecutes cases of illegal insider trading, which can result in penalties of up to 3 times the profit or even jail time.
| Characteristics | Values |
|---|---|
| Definition of Insider Trading | Buying or selling a security, in breach of a fiduciary duty or other relationship of trust and confidence, while possessing material, nonpublic information about the security. |
| Who is an "Insider"? | A person who is directly or indirectly the beneficial owner of more than 10% of a company's equity securities. This often includes directors, officers, and principal stockholders who hold high positions at the company. |
| Legal Insider Trading | When company executives, directors, or large shareholders buy or sell their company's stock and follow specific rules, such as filing these transactions with the SEC. |
| Illegal Insider Trading | Occurs when anyone trades based on non-public information, which gives them an unfair advantage over other investors. |
| Penalties | SEC investigations into insider trading can result in penalties of 3X the profit, and even jail. Companies can be fined up to $25 million. |
| Reporting Requirements | Insiders in the United States are required to file Form 4 with the SEC within two business days of buying or selling shares of their own companies. |
| Impact on the Stock Market | Insider trading creates a culture of corruption that hurts the market's liquidity and efficiency, leading to reduced investment and negative consequences for the economy. |
| Enforcement | The SEC actively monitors trading volumes and uses advanced data analytics to spot suspicious activity that may indicate illegal insider trading. |
| Examples of Illegal Insider Trading | A lawyer working on a corporate merger trading on non-public information; a hedge fund manager receiving and acting on non-public information without disclosure; a company executive sharing confidential information with a family member who then trades on it. |
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What You'll Learn

Legal vs illegal insider trading
Insider trading involves buying or selling a company's stock based on access to non-public, material information or by those holding a significant stake in the company. While insider trading has legal forms, such as executives purchasing shares in their own companies, there are also illegal forms.
Legal insider trading happens when company executives, directors, or large shareholders buy or sell their company's stock and follow specific rules, such as filing these transactions with the SEC. For example, if an insider expects to retire after a specific period and has adopted a written binding plan to sell a specific amount of the company's stock every month for two years, trades based on the original plan might not constitute prohibited insider trading. Legal insider trades are transparent, and the information is available in public databases.
Illegal insider trading occurs when anyone trades based on confidential information not yet disclosed to the public, thus gaining an unfair advantage. For instance, if a CEO sells shares after learning of an impending financial loss before that information is made public, this constitutes illegal insider trading. In a major 2024 case, SEC v. Panuwat, Matthew Panuwat, a former Medivation executive, was found guilty of using confidential information about his company's acquisition to trade in Incyte Corporation (INCY) securities, a comparable company in the same industry. Illegal insider trading carries severe penalties, including potential fines, prison time, and other penalties.
In the United States, corporate officers, key employees, directors, or significant shareholders must report their trading to the regulator or publicly disclose it within a few business days of the trade. In these cases, insiders in the US are required to file Form 4 with the US Securities and Exchange Commission (SEC) when buying or selling shares of their own companies. The SEC defines an insider as "an officer, director, 10% stockholder, and anyone who possesses inside information because of his or her relationship with the Company or with an officer, director, or principal stockholder of the Company." Such trading is illegal when it is "the buying or selling of a security, in breach of a fiduciary duty or other relationship of trust and confidence, based on material, nonpublic information about the security."
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Who is considered an insider
Insider trading is a complex issue with rules varying significantly between countries. In the United States, the SEC defines an insider as "an officer, director, 10% stockholder and anyone who possesses inside information because of his or her relationship with the Company or with an officer, director or principal stockholder of the Company".
This definition includes not only high-ranking individuals within a company but also anyone who possesses inside information due to their relationship with the company or its key personnel. This means that even individuals who are not direct employees of the company, such as family members or individuals who reside in the same household as an insider, can be considered insiders if they have access to non-public information.
In addition to this broad definition, the SEC's Rule 10b-5 further expands the scope of who is considered an insider. This rule prohibits corporate officers, directors, and other insider employees from using confidential corporate information for personal gain through trading in the company's stock. It also prohibits the "tipping" of confidential information to third parties.
In the European Union and the United Kingdom, the scope of who is considered an insider is even broader. Under the rubric of market abuse, the EU and UK laws subject trading on non-public information to civil and criminal penalties. Corporate insiders are defined as a company's officers, directors, and any beneficial owners of more than 10% of a class of the company's equity securities.
It is important to note that the definition of an insider is not limited to corporate officials and major shareholders. Even individuals with no direct affiliation to the company, such as spouses or other relatives of insiders, can be considered insiders if they possess and act upon material non-public information.
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Reporting insider trading
Insider trading is when an individual buys or sells securities based on material non-public information about a company, in violation of a duty owed to the source of the information. In the United States, trading conducted by corporate officers, key employees, directors, or significant shareholders must be reported to the regulator or publicly disclosed, usually within a few business days of the trade. Insiders in the US are required to file Form 4 with the US Securities and Exchange Commission (SEC) when buying or selling shares of their own companies. The SEC requires insiders to file reports of their trades, which are publicly available. Form 4 is the most commonly used form, filed whenever an insider buys or sells company stock. It must be submitted within two business days of the transaction. Form 5 is used for transactions exempt from Form 4 requirements and is often filed annually.
The process of reporting insider trading as a whistleblower is relatively straightforward. However, proving that someone has performed an illegal trade based on insider information can be difficult. To report insider trading, whistleblowers can submit tips, complaints, and referrals (TCRs) using the SEC's online TCR system and complaint form. To qualify for rewards, a whistleblower must have an attorney represent them in connection with their submission. The SEC Whistleblower Program offers awards and protection to those who report insider trading. Whistleblowers with high-quality original information that leads to a successful enforcement action can receive monetary awards. As of the end of fiscal year 2024, a total of almost $2.2 billion had been awarded to nearly 444 whistleblowers through the SEC Whistleblower Program.
In the European Union and the United Kingdom, all trading on non-public information is, under the rubric of market abuse, subject to civil penalties and possible criminal penalties. The UK's Financial Conduct Authority has the responsibility to investigate and prosecute insider dealing, as defined by the Criminal Justice Act 1993.
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Insider trading laws and their impact
Insider trading is a highly controversial topic among business and legal scholars. Some, like Henry Manne, argue that insider trading should be allowed, claiming that it could benefit markets. Others, like Gurbir S. Grewal, the director of the SEC's Division of Enforcement, argue that "public trust is essential to the fair and efficient operation of our markets. But when public company insiders take advantage of their status for personal gain, the investing public loses confidence that the markets work fairly and for them."
In the United States, several laws and regulations govern insider trading. The U.S. Securities and Exchange Commission (SEC) requires insiders to file reports of their trades, which are publicly available. Insiders must file Form 4 when buying or selling shares of their own companies, and Form 5 for transactions exempt from Form 4 requirements. The SEC has also pursued "shadow trading," which involves using material nonpublic information about one company to trade in the securities of a related company.
The misappropriation theory of insider trading is also accepted in U.S. law. This states that anyone who misappropriates material non-public information and trades on that information may be guilty of insider trading. This includes individuals who are not traditional insiders, such as lawyers or consultants, who obtain confidential information through their work and use it for their own gain.
In addition to federal laws, companies may also implement their own insider trading policies. For example, Global Future City Holding Inc. has adopted the "Window Period" guideline, which covers the purchase or sale of its stock or other securities by insiders. This period opens on the second trading day after the company's quarterly or annual earnings figures are publicly released and remains open for 20 full trading days. Transactions must take place during this period, and directors and officers must obtain pre-clearance for trades even during the Window Period.
Violations of insider trading laws and company policies can result in serious consequences, including civil and criminal charges and dismissal from the company. Therefore, it is essential for investors to understand the rules and regulations to protect themselves and ensure they operate within the bounds of the law.
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Penalties for insider trading
Insider trading is a complex area of federal law and can often result in related criminal charges. In the United States, the Securities and Exchange Commission (SEC) and the U.S. Department of Justice may investigate cases of insider trading. However, only the Attorney General's Office may file criminal charges.
Insider trading is defined as the practice of purchasing or selling a publicly traded company's securities while in possession of material information that is not yet public. An "insider" can include corporate officers, directors, major stockholders, and employees of an entity whose securities are publicly traded.
If found in violation of U.S. securities laws as a result of insider trading, individuals may face a maximum sentence of 20 years in a federal penitentiary. The maximum criminal fine for individuals is $5,000,000, and the maximum fine for "non-natural" persons (such as an entity whose securities are publicly traded) is $25,000,000. Individuals may also become subject to an injunction and may be forced to surrender any profits gained or losses avoided. The civil penalty for a violator is subject to "treble damages", meaning they may be liable for an amount up to three times the profit gained or loss avoided as a result of insider trading.
In addition to civil and criminal penalties, individuals may also face non-punitive collateral consequences, such as a ban from serving as a director, CEO, CFO, or any other officer role responsible for preparing, auditing, or disclosing financial results of any public company. A violation of insider trading laws is also likely to adversely affect any professional licensure held by the individual.
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Frequently asked questions
Insider trading is when someone buys or sells stocks based on non-public information, giving them an unfair advantage over other investors.
An "insider" is typically a company executive, director, large shareholder, or employee with access to non-public information. However, even family members or friends who receive and act on such information can be considered insiders.
In the US, the Securities and Exchange Commission (SEC) regulates insider trading. Insiders must file Form 4 when buying or selling shares of their own company. The SEC monitors trading volumes and investigates suspicious activity. Violations can result in civil and criminal charges, fines, and jail time.
Yes, legal insider trading occurs when insiders buy or sell shares of their company following specific timing guidelines and accurately reporting trades to the SEC. This ensures transparency and helps maintain public trust in the market.
Violating insider trading laws can lead to serious consequences, including civil and criminal charges, fines, and jail time. The SEC may demand penalties of up to three times the profit gained from illegal trades. Companies can be fined up to $25 million, and individuals may face fines up to $5 million and jail time of up to 20 years.






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