Introduction
A Rule 10b5-1 plan only protects an insider's trades if every condition holds, from the day it is adopted to the quarter it is disclosed. This guide walks each stage and shows where the defense is won or lost.
A Rule 10b5-1 plan lets an insider trade on a schedule fixed in advance and, if the plan meets the rule's conditions, rely on an affirmative defense to insider trading liability for those trades. It is how a director can sell during a blackout, or an officer can diversify on a schedule, without each sale being judged on what they knew that week. Since the SEC's December 2022 amendments, running plans has also become an ongoing program for the legal team rather than a document a lawyer drafts once. This guide follows a plan from the decision to use one through adoption, cooling-off, execution, modification and disclosure. Three companion pieces go deeper: one on the 2022 amendments, one on Item 408 disclosure, and one on day-to-day plan administration.
What the defense covers, and what it doesn't
Rule 10b5-1(c) provides an affirmative defense: a trade made under a qualifying plan is treated as not made "on the basis of" material nonpublic information (MNPI), because the decision to trade was fixed before the person had that information. It does not protect a plan entered in bad faith, a plan that misses a condition, or a trade outside the plan's terms. Miss one condition and the defense falls away, leaving the trade to be judged on what the person knew when it executed, not on the plan that authorized it. A plan is a defense you earn by passing every gate, not a shield you get by signing a document.
Plan or pre-clearance?
Not every insider needs a plan. One earns its overhead when someone trades regularly, holds a large position they need to diversify, or wants to trade at times when the window would otherwise be closed. For an insider who trades rarely and only in open windows, ordinary pre-clearance may be enough, and a plan would add administration for a defense they will seldom use. Make the choice deliberately, with counsel, based on each person's trading pattern and risk tolerance.
Gate 1: adoption
A plan can only be adopted when the person is not aware of MNPI. In practice, that means adopting during an open trading window and clearing the adoption just as you would clear a trade.
Directors and officers must also include two representations in the plan itself: that they are not aware of MNPI about the company or its securities, and that they are adopting the plan in good faith and not as part of a scheme to evade the rule. These certifications are signed into the plan at adoption, not collected afterward. Keep them with the adoption record so you can produce them on request, because a representation you can't find is a gap in the defense.
Each plan must set the amount, price and timing of trades, or a formula or written instructions the broker follows, and the insider must keep no discretion over the trades. Good faith also has to last the life of the plan, not just the day it is signed. A plan adopted honestly but later manipulated, for example by influencing when the company releases news so that it benefits a scheduled sale, can lose the defense.
Gate 2: cooling-off
Trading cannot start the moment a plan is signed. For directors and officers, the first trade under a new or modified plan must wait until the later of 90 days after adoption or modification, or two business days after the company files the Form 10-Q or 10-K for the fiscal quarter in which the plan was adopted, with the wait capped at 120 days. Other insiders wait 30 days. The company's own plans carry no cooling-off period.
Here is how that plays out. A director at a calendar-year company adopts a plan on Thursday, May 13, 2027. Ninety days later is Wednesday, August 11. If the second-quarter 10-Q is filed on Wednesday, August 4, two business days later is Friday, August 6, so the later date, August 11, governs and that is the first day the plan can trade. If the 10-Q slips to Friday, August 20, the first trade moves to Tuesday, August 24. And if the director changes the number of shares to be sold in July, the count starts again from the date of that change.
Because a modification can reset the clock, adoption and modification dates are facts the defense depends on, not administrative detail. The full cooling-off mechanics and the other 2022 conditions are set out in Rule 10b5-1 after the 2022 amendments.
Gate 3: one plan at a time
With limited exceptions, an insider may not hold more than one open-market Rule 10b5-1 plan at once, and a single-trade plan (one designed to execute as a single transaction) qualifies for the defense only once in any 12-month period. Both limits apply across everything the person has adopted, not within a single plan. Before approving a new plan, then, check every other plan that person holds or has held in the past year. Review a plan in isolation and a second, prohibited plan can get through.
Gate 4: execution and the broker
Once cooling-off ends, the broker the insider named trades according to the plan, and two things need watching. First, the broker's instructions must match the plan your compliance team holds, because a gap between what was executed and what was recorded is exactly what an enforcement review looks for. Second, each execution comes back as a broker notice that feeds Section 16 reporting, and the same trade can arrive more than once.
Every execution needs a Form 4 by the end of the second business day, with the box checked to show the trade was made under a plan intended to satisfy Rule 10b5-1(c). Deduplicating broker notices as they come in is what stops a plan trade from being reported twice, or not at all.
Modification and termination
Your most important day-to-day call is deciding whether a change counts as a modification, which restarts the cooling-off clock, or an administrative change, which does not. Any change to the amount, price or timing of trades is treated as terminating the plan and adopting a new one, so the clock restarts. Changes that leave those terms alone generally do not. Classify each change and record why, so the decision can be reviewed later rather than assumed.
Terminations matter too. Repeatedly adopting and canceling plans can undermine a claim of good faith, so record each termination and be ready to explain it, rather than quietly deleting the plan.
Disclosure
Item 408 of Regulation S-K, added by the 2022 amendments, turns the plan record into a reporting obligation. Item 408(a) requires the company to disclose each quarter, in its 10-Q or 10-K, whenever a director or officer adopted or terminated a Rule 10b5-1 plan or a "non-Rule 10b5-1 trading arrangement". The disclosure must give the material terms: the person's name and title, the date, the plan's duration and the aggregate number of securities to be traded, though not the price. A modification of amount, price or timing counts as a termination and a new adoption, so it is disclosed as well. Item 408(b) separately requires annual disclosure of the company's insider trading policies.
Together with the Form 4 checkbox, this means you need to be able to say at any quarter-end what was adopted, changed or ended, by whom, and on what terms. Closing the quarter as a review rather than a scramble is covered in The Item 408 disclosure workflow.
One record for the whole sequence
Every gate above depends on sequence. The adoption date decides the cooling-off; whether a change was a modification decides whether the clock restarted; whether a second plan overlapped decides whether either one qualifies. If that history is scattered across drafts, email threads and broker portals, so are the answers. 10b5-1 plan administration for legal teams sets out what that record has to do across many reporting persons and multiple brokers.
Many people, many brokers
At any real scale, a program runs plans for many reporting persons through more than one broker, and that is where managing one plan at a time breaks down. The overlap and single-trade limits apply per person but need checking across the whole program, executions arrive from different brokers in different formats, and the disclosure obligation pulls everyone together each quarter. A program-wide view (every person's plans, the status of every open plan, every execution matched to its plan) is what makes the per-person rules enforceable and turns quarter-end into a review rather than a search. Without it, a second prohibited plan or an unreported termination reaches the quarter unnoticed.
Where the program stops
Two limits are worth stating plainly. Form 144, the notice of a proposed sale of restricted or control securities, remains a decision for a person, not a system: a program can coordinate the applicability review, hand off to your filing provider and record the outcome, but it does not make the legal call or submit the form. And a plan is a defense, not a guarantee. It protects trades that meet every condition and does nothing for those that don't.
InsiderList keeps a 10b5-1 program in one register. It records adoptions, modifications and terminations, with each director's and officer's representations stored against the adoption they belong to. It calculates cooling-off dates and records any exceptions your policy authorizes, flags overlapping and single-trade plans across each person's full history, and takes in broker execution notices without duplicates, so each plan trade flows into Section 16 preparation exactly once. Your filing provider still files and your counsel still reviews, while InsiderList applies the cooling-off and overlap rules that the rule and your policy set, and keeps the sequence the defense depends on.
See every plan's lifecycle on one record, from adoption to execution.
InsiderList is insider trading compliance software used by companies in the UK, Europe, the USA and the UAE. This article is for general information and does not constitute legal advice. For advice on your situation, consult qualified US securities counsel.
