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Transaction Code P

M
Marcus Thorne
Last Updated: January 5, 2026
Plain English Definition

Transaction Code P on Form 4 indicates an open market purchase of securities. This is when an insider buys company stock on a public exchange at market prices, representing one of the strongest bullish signals.

The Trader's Take

The Signal

Transaction Code P purchases are among the most reliable bullish indicators. When insiders buy with their own money at market prices, it demonstrates genuine conviction about the company's future prospects.

The Noise

Small Code P purchases that don't meaningfully increase position size may be routine portfolio management rather than strong conviction signals.

Actionable Insights

  • 1
    Focus on Code P purchases that increase the insider's total position by more than 10%.
  • 2
    Compare Code P purchase prices to recent trading ranges—buying near highs is more significant.
  • 3
    Look for multiple Code P transactions from different insiders (cluster buys).
  • 4
    Distinguish Code P from other transaction codes like grants (Code A) or exercises (Code M).

Regulatory Context & Context

Transaction Code P is one of many transaction codes used on Form 4 filings to categorize different types of insider transactions. The SEC requires specific codes to ensure accurate reporting and analysis of insider trading activity.

Common Misconceptions

Not all purchases are Code P—grants, exercises, and other transaction types use different codes.

Code P specifically means open market purchase, not any purchase transaction.

The transaction code system helps distinguish between different types of insider activity.

Frequently Asked Questions

What does Transaction Code P mean?

Transaction Code P indicates an open market purchase, where an insider buys company stock on a public exchange at current market prices.

Are Code P purchases more significant than other transaction types?

Yes, Code P purchases are generally considered more significant because they represent insiders buying with their own money at market prices, demonstrating conviction.

On This Page

Trader's TakeRegulatory ContextCommon MisconceptionsF.A.Q.

Related Intelligence

Trading Terms
Open Market Purchase
Trading Terms
Transaction Code S
Trading Terms
Transaction Code A
SEC Filings
Form 4

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