10b5-1 Trading Plans Explained: How Executives Legally Trade Their Own Stock

Corporate executives and directors often hold large amounts of company stock, but they also routinely possess information the public does not have, from unreleased earnings to pending mergers. Trading on that kind of material nonpublic information (MNPI) is illegal insider trading. Yet insiders still need to buy and sell shares for legitimate reasons: covering tax bills tied to vested equity, diversifying a concentrated position, or funding a home purchase. Rule 10b5-1, adopted by the Securities and Exchange Commission under the Securities Exchange Act of 1934, is the mechanism that lets them do this without running afoul of insider-trading law.

What the Rule Actually Does

Rule 10b5-1 provides an affirmative defense, not blanket immunity. If an insider is later accused of trading on MNPI, they can point to a pre-existing written plan as evidence the trade was not based on information they possessed at the time of execution. To qualify, the plan generally must be entered into in good faith, at a time when the insider was not aware of MNPI, and it must either specify the amount, price and dates of trades in advance or delegate trading decisions to a third party (such as a broker) who is also walled off from MNPI.

Once adopted, the plan runs on autopilot. Trades execute according to the formula regardless of what happens at the company afterward, which is the entire point: the insider's later knowledge cannot influence a decision that was already locked in.

Why the SEC Tightened the Rule in 2022

Academic research and enforcement cases over the years raised concerns that some insiders were using 10b5-1 plans opportunistically, adopting or canceling plans, or timing trades within existing plans, in ways that suggested the 'good faith' requirement was not being taken seriously. In December 2022, the SEC adopted amendments (Release No. 33-11138) designed to close these gaps. Key changes include mandatory cooling-off periods before trading can begin under a new or modified plan, a requirement that officers and directors certify they are not aware of MNPI when adopting a plan, restrictions on overlapping or multiple concurrent plans, and limits on the use of single-trade plans.

Key Features of the Current Rule

• Cooling-off period: directors and officers must generally wait the later of 90 days after adoption or two business days following disclosure of financial results in the relevant Form 10-Q or 10-K, capped at 120 days; issuers (the company itself) face a 30-day cooling-off period.
• Good faith requirement: the rule now explicitly states that trades under a plan must be conducted in good faith and not as part of a scheme to evade insider-trading prohibitions.
• Certification: directors and officers must certify at adoption that they are not aware of MNPI and are adopting the plan in good faith.
• No overlapping plans: with limited exceptions, an individual generally cannot have multiple overlapping 10b5-1 plans for open-market trades in the same class of securities.
• One single-trade plan per 12-month period: plans structured as a single transaction are restricted to reduce the risk of opportunistic timing.
• Disclosure: under Item 408 of Regulation S-K, companies must disclose in their quarterly and annual reports whether directors, officers or the company itself adopted, modified or terminated a 10b5-1 plan, along with material terms.
• Form 4 checkbox: insiders reporting a trade must indicate whether it was made pursuant to a 10b5-1 plan, letting investors and researchers track this activity.

What This Means for Investors

For retail investors, 10b5-1 disclosures are a window, not a crystal ball. A cluster of insider selling under a pre-arranged plan is often routine portfolio management, not a red flag. Context matters: the size of the sale relative to the insider's total holdings, whether the plan was adopted recently or well in advance, and whether multiple insiders are selling around the same time. Investors can find these disclosures in a company's proxy statement, its Form 10-K or 10-Q under Item 408, and in individual Form 4 filings on the SEC's EDGAR system.

The Bottom Line

Rule 10b5-1 exists to let corporate insiders manage their personal finances without being locked out of the market simply because they know things the public does not, while giving regulators and investors tools to detect abuse. The 2022 amendments narrowed the room for gaming the system by adding waiting periods, certifications and more granular public disclosure. For everyday investors, understanding how these plans work, and where to find the disclosures, adds one more layer of context when interpreting insider buying and selling activity in the companies they own.