10b5-1 Plans: Why Pre-Scheduled Insider Trades Are Different

What is a 10b5-1 plan?

A 10b5-1 plan is a pre-arranged trading agreement between a corporate insider and their broker. Under SEC Rule 10b5-1, insiders can set up a plan — specifying the amount, price, and timing of future stock sales — before they come into possession of material non-public information (MNPI).

Once the plan is established, trades execute automatically according to the schedule, without the insider making any further decisions. This structure is designed to give insiders a legal defense: because the trade was pre-planned, it cannot be motivated by information they received after the plan was set up.

Why 10b5-1 sales should be treated differently

Discretionary insider buying — an executive deciding to spend personal money on company stock today — is a meaningful signal. The insider has a view of the company's future and is backing it with cash.

A 10b5-1 sale is different. It was scheduled 30, 60, or 90 days earlier. The insider is not reacting to current conditions. They may be selling to diversify their portfolio, fund a home purchase, or pay taxes on restricted stock vesting — none of which says anything about their view of the company's prospects.

This is why experienced investors routinely discard 10b5-1 plan transactions when analyzing insider selling. The informational content is much lower than a discretionary sale.

How to identify 10b5-1 transactions in Form 4 filings

Form 4 filings include a field called the "nature of indirect beneficial ownership" and footnotes that typically disclose whether a transaction was executed under a 10b5-1 plan. Look for:

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  Footnote disclosure: Most filings that involve 10b5-1 plans include a footnote like "This sale was made pursuant to a Rule 10b5-1 trading plan adopted on [date]."
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  Transaction code "S": Open-market sales use code "S." Whether it's 10b5-1 or discretionary must be inferred from the footnotes.
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  Regular, recurring patterns: Automated plan sales often appear in regular intervals — the same day each month, or specific price thresholds — which look different from one-off discretionary sales.

The 2023 SEC rule changes

In February 2023, the SEC tightened 10b5-1 plan rules in response to research showing that some insiders were abusing the structure — adopting plans shortly before negative news, or canceling plans when they received positive information.

The updated rules require a 90-day cooling-off period between plan adoption and the first trade (120 days for CEOs and CFOs). This reduces the ability to time plan adoption around known upcoming information.

The change made 10b5-1 sales somewhat more reliable as non-informative — but the core point remains: a scheduled sale is not the same as an executive actively choosing to reduce their position today.

What actually matters: the signal asymmetry

The most important practical takeaway is the asymmetry between buying and selling:

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  Insider buying: Almost always discretionary. There are very few reasons to buy company stock other than genuine conviction it will go up. This is the signal that carries the most weight.
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  Insider selling (non-plan): Worth paying attention to when it's large, sudden, and outside any pre-announced plan. Multiple insiders selling without plan disclosure in a short window is a meaningful signal.
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  10b5-1 selling: Largely noise. Ignore it unless the plan was recently adopted (suggesting opportunistic timing) or cancelled mid-execution (which sometimes precedes positive news).

How InsiderAct handles 10b5-1 data

InsiderAct focuses on open-market purchase signals — cluster buys, large insider purchases, and buying-the-dip events. These are all discretionary buying transactions, which means they carry higher informational weight than pre-scheduled plan sales.

Transaction records include the raw Form 4 data so you can review footnotes and identify plan-related sales if you're analyzing insider selling patterns on a specific company.