Multiple 10b5-1 Plans: The Single-Plan-at-a-Time Rule and Its Exceptions

An executive wants to sell a scheduled RSU-vesting tranche each quarter (a sell-to-cover-plus-diversification arrangement) while also positioning a one-off sale ahead of a charitable-giving commitment. Under the pre-2023 rules, two separate plans were permissible: the two had different triggers and purposes, and many executives maintained multiple overlapping plans. Post-2023, Rule 10b5-1(c)(1)(ii)(D) prohibits overlapping plans except in narrow circumstances, and executives who try to maintain two plans risk losing the affirmative defense entirely.

This article walks through what the single-plan rule actually prohibits, the explicit exceptions, and plan-design strategies that accomplish the same goals within one plan.

The prohibition

Rule 10b5-1(c)(1)(ii)(D) says that if a person has adopted more than one 10b5-1 plan for trades in the same class of securities, they cannot rely on the affirmative defense for any of the plans. The single-plan-at-a-time rule applies at the individual level, not at the security level.

What counts as a plan

Any written trading arrangement that satisfies the elements of Rule 10b5-1(c)(1)(i): specifies amount/price/date or delegates discretion to a broker within pre-set parameters, is entered into in good faith without MNPI, and is not a scheme to evade.

What “same class of securities” means

Common stock at a single issuer is one class. ADRs, preferred shares, convertible notes, options, and warrants are potentially different classes, but most 10b5-1 plans at public companies cover common stock.

Why the rule exists

The SEC observed that executives sometimes adopted overlapping plans with different terms, then selectively executed the one most favorable at any given moment. This effectively let insiders trade on MNPI while maintaining a defensive cover.

The three explicit exceptions

Exception 1: sell-to-cover plans for tax withholding

A plan that sells just enough shares to cover taxes owed upon the vesting of an equity award (RSUs, PSUs, share-settled options) is not counted against the single-plan limit.

Requirements:

The plan must not permit the insider to exercise any influence over the amount, price, or timing of the sale
Sales are triggered by and limited to the amount needed to satisfy tax obligations on vest
The broker has no discretion beyond executing the sell-to-cover

This is the most-used exception. Most executives maintain a standing sell-to-cover arrangement through the company’s stock-administration service or a designated broker; this arrangement runs alongside any discretionary diversification plan.

Exception 2: replacement plans after end of existing plan

Adoption of a new plan after the previous plan has fully executed or been terminated. The new plan starts a fresh cooling-off period. The two plans cannot overlap in execution.

Timing:

Existing plan completes its last trade (or is terminated) on day 0
New plan adopted on day 0 or later
New plan’s cooling-off period begins at adoption (90 days for Section 16, 30 for others)
First trade of new plan is at earliest day 90 for officers

Exception 3: single-trade plans (once every 12 months)

A single-trade plan executes one transaction and terminates. Executives can use one single-trade plan per 12-month period and still rely on the affirmative defense.

Example: a CEO wants to sell 10,000 shares on a specific future date. A single-trade plan works. After the sale, the CEO can adopt a multi-trade plan. Another single-trade plan within 12 months is not protected.

What the rule does not prohibit

Plans covering different securities classes

Separate plans for common stock and employee stock options (as a class) may coexist. In practice, this split is rare because most insiders sell the underlying stock.

Plans at different issuers

An executive who holds equity at two different companies (e.g., serves on two boards) can have one 10b5-1 plan at each. The rule applies per-issuer.

Non-10b5-1 trading arrangements

Trading that does not rely on the 10b5-1 affirmative defense is not a “plan” for purposes of the rule. Executives can trade outside the window based on other defenses (lack of materiality, lack of scienter, etc.), though this is rarely advisable.

Design strategies within one plan

The single-plan rule pushes executives to consolidate trading programs into one well-designed plan. Common structures:

Tiered scheduling

One plan with multiple layers:

Monthly sell-to-cover for vesting (exception; parallel)
Quarterly diversification sales at specified dates or limit prices
Event-driven single-trade carved out as a separate single-trade plan used once per 12 months

Limit-price windows

Plan sets up multiple trade windows, each with its own limit price and volume cap. If price hits the limit during the window, the trade executes. If not, the window closes without a trade.

The simplest plan. Sell $100,000 worth of stock on the 15th of each month. The algorithm is deterministic; no discretion.

Combination plan

Most executive plans combine:

A regular monthly or quarterly diversification component
Limit-price windows for opportunistic execution
A carve-out for events (vesting, taxes, etc.)

All of these can live within a single plan document. The key is that the plan is comprehensive and contemplates the executive’s full trading intent for the coming year.

Modifications and the plan-identity question

If an executive modifies an existing plan, is the modified plan “the same plan” or a “new plan”?

Material modifications reset

Changes to amount, price, timing algorithm, or duration are material modifications. The modified plan is treated as a new plan for cooling-off and certification purposes. Fresh 90-day cooling-off applies.

Administrative changes do not reset

Correcting a broker’s contact information, updating personal address, or clarifying non-substantive terms do not trigger modification treatment.

Partial executions are not modifications

If the plan specifies monthly sales of $50,000 and the broker executes each month, each sale is part of the same plan. No restart.

The practical workflow

For a Section 16 officer adopting a comprehensive plan:

Step 1: inventory trading intent

List all planned sales, vesting events, tax obligations, and potential events for the next 12-24 months.

Step 2: identify which elements qualify for exceptions

Sell-to-cover on vesting uses the sell-to-cover exception. Other sales must fit within the single-plan.

Step 3: draft a comprehensive plan document

Cover all intended diversification, limit-price execution, and scheduled sales. Include algorithm, price floors, date windows, and volume caps.

Step 4: run good-faith certification

Confirm no MNPI. Sign certification. File plan with broker.

Step 5: observe cooling-off

90 days for Section 16, 30 days for others, per the 2023 amendments.

Step 6: let the plan execute

Avoid subsequent modifications unless truly needed. Each modification restarts cooling-off.

Common mistakes

Maintaining a “backup” plan

Some executives adopt a secondary plan thinking they can abandon it if unused. The SEC’s view: both plans exist simultaneously, both are 10b5-1 arrangements, and the affirmative defense is lost for both.

Treating the sell-to-cover as a second plan

The exception covers only genuine sell-to-cover. If the “sell-to-cover” plan actually allows broader sales beyond tax obligations, it is a second plan and the exception does not apply.

Multiple single-trade plans

Using the single-trade exception more than once per 12 months loses the defense for the excess plans.

Overlapping via broker confusion

If one executive has plans with two different brokers, both are 10b5-1 plans and both are counted. Consolidate at one broker or terminate one before the other begins.

Frequently asked

Can my spouse have a separate plan?

Yes. The rule applies per-person. A spouse’s plan is separate unless the spouse trades attributed to the executive under Section 16(a) rules.

What about a family trust?

Plans at a separate legal entity (family trust) with an independent trustee can be separate, though attribution under Section 16 may still apply. Counsel carefully.

Can I have a plan and also trade outside of the plan during open windows?

Yes. Rule 10b5-1 does not prohibit other trades; it just doesn’t extend the affirmative defense to them. Non-plan trades during open windows need standard MNPI clearance from general counsel.

Does the rule apply to private companies?

Rule 10b5-1 is an SEC rule for securities registered or in registration. Private companies don’t directly come under it, but pre-IPO companies preparing for registration sometimes adopt equivalent policies.

Do non-officers face the same single-plan rule?

Yes, but the stakes are lower. Non-officers aren’t subject to Section 16 reporting or most Item 408(a) public disclosure. The rule still applies if they want to claim the 10b5-1 defense.

Can I set up a new plan while the old one is still running?

No. The new plan cannot be adopted during the old plan’s execution window. Terminate the old plan first, wait out cooling-off, then execute the new plan.

Next step

If you have an existing 10b5-1 plan or are considering one, ensure your full trading program for the next 12-24 months can fit inside a single comprehensive document with only the narrow exceptions (sell-to-cover, one single-trade). Work with your general counsel and broker to design the plan once, certify properly, and avoid modifications. Every modification costs another 90 days of execution delay; fewer, better plans beat many fragmented ones.