--- title: What Is a Rule 10b5-1 Trading Plan? type: learn slug: what-is-a-10b5-1-trading-plan canonical_url: https://13finsight.com/learn/what-is-a-10b5-1-trading-plan published_at: 2026-05-16T19:49:44.606Z updated_at: 2026-05-16T19:51:17.465Z author: Sarah Mitchell author_title: Education Editor author_url: https://13finsight.com/authors/sarah-mitchell word_count: 1103 locale: en source: 13F Insight --- # What Is a Rule 10b5-1 Trading Plan? > A Rule 10b5-1 trading plan lets corporate insiders sell shares on a prearranged schedule without violating insider trading rules. Understanding how these plans work helps investors correctly interpret insider Form 4 filings and separate mechanical selling from discretionary conviction shifts. The Problem a 10b5-1 Plan Solves Corporate executives and directors know information about their companies that the public does not. Under SEC Rule 10b-5, it is illegal to trade on that "material non-public information" (MNPI). But executives also have legitimate reasons to sell stock — diversifying a concentrated equity position, paying taxes, funding personal expenditures — that have nothing to do with what they know about the business. Rule 10b5-1, adopted in 2000 as a safe harbor under Rule 10b-5, addresses this tension by allowing insiders to prearrange trades in advance, before they possess MNPI, and then execute those trades mechanically on a predetermined schedule regardless of what they learn afterward. In practical terms: a CEO who wants to sell 500,000 shares over the next 18 months can establish a 10b5-1 plan during a trading window (typically after a quarterly earnings release), specify the price, volume, and date parameters for the sales, and then hand execution to a broker. The CEO no longer makes daily decisions about when to sell — the algorithm does. This is why observing CEO Form 4 filings showing small, equal-lot sales at minor price increments on consecutive days is a hallmark of plan execution, not a series of discretionary trades. For example, CrowdStrike CEO George Kurtz has sold shares in lots of 26, 54, 50, 91, 106, 115, 39, and 63 shares in a single day — a pattern mechanically inconsistent with human market-timing. How to Recognize a 10b5-1 Plan in Form 4 Filings Form 4 filings do not always explicitly label transactions as plan sales, but several signals in the filing indicate prearranged execution. First, look at transaction code: Form 4 uses code "S" for open-market sales, but the footnotes often state something like "Sold pursuant to a Rule 10b5-1 trading plan adopted [date]." Second, look at lot sizes: equal lots (e.g., five sales of exactly 10,000 shares each) or micro-lots (26, 54, 50 shares) are algorithmically generated, not human decisions. Third, look at price clustering: plan sales often occur within a 1-2% price band across a single day's executions, reflecting a VWAP or limit-order strategy. You can explore insider filing patterns directly on profiles like Roku's Anthony Wood to see these patterns in practice. Starting in 2023, the SEC tightened the 10b5-1 rules under amendments effective February 2023. Key changes: insiders who are officers or directors must now wait at least 90 days (or until the next open trading window, whichever is later) between establishing a plan and executing the first trade. This "cooling-off period" is designed to prevent insiders from setting up a plan right before negative news. The amendments also limit insiders to a single active plan at a time and restrict single-trade plans to one per year. What a Plan Sale Does NOT Mean When an insider sells under a 10b5-1 plan, the sale is not a signal that the insider believes the stock is about to decline. The decision to sell was made in the past, under different information conditions, and the execution is mechanical. Investors who interpret every plan sale as a bearish signal misread the instrument. The more meaningful behavioral signals to watch for are: Plan modifications or terminations. If an insider modifies the price, volume, or duration of an existing plan, or terminates it before completion, that action itself must be disclosed. A plan modification is potentially more informative than routine execution, because it reflects a decision made when the insider may possess current information about business conditions. Plan establishment timing. When was the plan set up? A plan established at the depths of a stock's trading range (implying the insider was willing to sell at those low prices) signals different things than a plan established near recent highs. The original plan-adoption date is disclosed in the Form 4 footnotes. Off-plan transactions. If an insider with an active plan also makes discretionary purchases (Form 4 code "P") outside the plan, that is a true behavioral signal — the insider chose to buy voluntarily, which 10b5-1 plans typically cannot mandate. How Form 4 Links to Beneficial Ownership Form 4 reports transactions and post-transaction holdings — but only for the shares covered by the filing. Insiders often hold shares via multiple entities (trusts, LLCs, family entities) that appear separately in Form 4 Table I and Table II. For a complete picture of an insider's economic interest, cross-reference the Form 4 history with the 13D and 13G filings visible on the insider profile page. A 13G filing from an insider indicates ownership above 5% of a class of shares, disclosed on a separate annual schedule. These beneficial ownership filings persist even as individual Form 4 transactions reduce the reported position, because the 13G discloses the threshold crossing while the Form 4s track the intra-year changes. For insider data, 13F Insight pulls Form 4 filings in real time as they are submitted to the SEC, and matches them against institutional holder data from quarterly 13F filings. This makes it possible to see whether an insider's plan-driven selling is occurring while major institutional holders are simultaneously building or maintaining positions — which is one of the most useful cross-checks available to retail investors trying to separate mechanical supply from conviction-driven accumulation. Visit the filer directory to find the institutional side of any company's ownership picture. Common Misconceptions About 10b5-1 Plans Several misconceptions persist about these plans. One: that all insider sales are 10b5-1 plan sales. They are not — some sales are discretionary transactions outside any plan, executed during open trading windows. The presence of a plan footnote in the Form 4 is the only reliable indicator. Two: that 10b5-1 plans guarantee legal protection. They create a presumption that the insider was not trading on MNPI at the time of plan establishment, but the SEC can still investigate whether the plan was set up in bad faith (e.g., with knowledge of imminent negative news). Three: that a long-running plan signals insider confidence. Plans are typically established for 12-24 months; a CEO selling in month 18 of a plan may be doing so entirely because the plan says so, not because they have any view on the current price. For investors tracking these filings systematically, the signals feed on 13F Insight surfaces Form 4 filings in real time alongside institutional position data, allowing you to see plan execution in the context of who is buying and holding on the institutional side. The activist filings tracker complements this with 13D schedule data that identifies when a large holder is seeking influence over the company's direction — often a more meaningful signal than any insider plan sale. ## FAQ ### What is a 10b5-1 trading plan? A Rule 10b5-1 trading plan is a prearranged schedule that allows corporate insiders to sell company stock on a predetermined basis without violating insider trading rules. The plan must be established during a period when the insider does not possess material non-public information (MNPI), and execution is mechanical — the broker follows the plan parameters regardless of what the insider learns later. ### How can you tell if an insider sale was part of a 10b5-1 plan? Look at the Form 4 footnotes: plan sales typically include language like 'sold pursuant to a Rule 10b5-1 plan adopted [date].' You can also spot plan execution by the transaction pattern — equal lot sizes, micro-lots (e.g., 26, 54, 50 shares), or price clustering within a 1-2% band across multiple same-day executions are algorithmically generated signatures rather than human market-timing decisions. ### Does a 10b5-1 plan sale mean the insider thinks the stock will go down? No. A plan sale is a mechanical execution of a decision made in the past, under different information conditions. The insider is not making a current market judgment — they are fulfilling a contractual schedule. The more meaningful signals to watch are plan modifications or early terminations, which reflect current decisions, or off-plan purchases, which reflect voluntary conviction buys outside the plan's scope. ### What are the 2023 SEC rule changes to 10b5-1 plans? The SEC tightened 10b5-1 rules effective February 2023. Officers and directors now face a mandatory 90-day (or next open trading window, whichever is later) cooling-off period between plan establishment and first execution. Insiders are also limited to one active single-trade plan per year and generally cannot run multiple overlapping plans simultaneously. These changes were designed to close loopholes where insiders set up plans while possessing knowledge of imminent news. ### Can a 10b5-1 plan be modified or cancelled? Yes, but any modification or early termination must be disclosed. If an insider changes the plan's price, volume, or schedule — or cancels it — that action reflects a current decision with whatever information they now hold. A plan running on its original schedule without modification is itself a neutral-to-positive signal; an insider expecting a sharp decline would have incentive to accelerate execution within the plan's terms. ### How do 10b5-1 plans relate to blackout windows? Public companies prohibit insiders from trading during 'blackout windows' around earnings and other material events. 10b5-1 plans are exempt from these restrictions because the trades were pre-programmed before any material event was known. This is why Form 4 filings often execute during periods when discretionary trading would be prohibited — the plan was established before the blackout period began. --- Source: 13F Insight — https://13finsight.com/learn/what-is-a-10b5-1-trading-plan Author: Sarah Mitchell — https://13finsight.com/authors/sarah-mitchell Last updated: 2026-05-16T19:51:17.465Z