Rule 10b5-1 basics

10b5-1 plan rules: what has to be true before trades begin.

A 10b5-1 plan is designed to create an affirmative defense for trades made under a written plan that was adopted before the insider knew material nonpublic information. It is not a permission slip to trade through bad facts. The defense depends on adoption timing, plan terms, good-faith operation, and coordination with issuer policy.

The core requirements

Written plan: The plan should specify the amount, price, and date of trades, or provide a formula or algorithm that determines those terms.
No MNPI at adoption: The insider should not be aware of material nonpublic information when entering the plan.
Good faith: The plan must be entered into and operated in good faith, with no later influence over how, when, or whether trades happen.
Issuer and broker procedures: Most companies and broker platforms add their own forms, trading-window rules, Rule 144 workflows, and pre-clearance steps.

What changed after the SEC amendments

The SEC's 2022 amendments tightened the plan framework. For insiders, the most important practical changes are cooling-off periods, director and officer certifications, restrictions on overlapping plans, limits around single-trade plans, and more disclosure around plan adoptions and terminations.

Cooling-offDirectors and officers generally wait longer before the first trade than other insiders.

CertificationDirectors and officers certify they are not aware of MNPI and are adopting in good faith.

Overlap limitsMultiple plans covering the same securities can undermine the defense, subject to narrow exceptions.

Good-faith operationLater influence, selective cancellation, or opportunistic modification can be a problem.

Financial decisions that are not solved by the rule

The rule does not decide how much stock you should sell, whether to use fixed-share or price-conditional instructions, which tax lots to prioritize, or how quickly to reduce concentration. That is where planning matters.

Position size: A $5M employer-stock position may need a staged sell-down plan, not a token quarterly sale.
Tax lots: Long-term lots, short-term lots, ISO shares, ESPP shares, and RSU shares may produce very different tax outcomes.
Cash needs: Home purchases, estimated tax payments, charitable giving, and liquidity events can change sale timing.
Future grants: RSU and PSU vesting can rebuild concentration even while the plan sells old shares.

Official sources

Primary SEC materials: SEC final rule release 33-11138 and the SEC announcement of the amendments. Read them with counsel before making plan decisions.

Need advisor-side coordination before adoption?

We match executives and concentrated-stock holders with advisors who can model sale cadence, taxes, and diversification before the broker and legal documents are finalized.