Form 4 Code P / Accumulation

Insider Buying Signals

Insider buying is the cleanest bullish signal when executives use personal capital to buy shares in the open market. InsiderAlpha isolates Code P transactions, compares them against selling pressure, and ranks tickers by live buy volume.

Signal_Model
Measures
Open-market purchases
Strong pattern
CEO/CFO open-market purchase with positive net flow
Weak pattern
Small director buy or option-related activity

Live Insider Buying Board

Revalidates hourly
#01ORCL

ORACLE CORP

Top insider: RUSCKOWSKI STEPHEN H

Buy Volume

$3.5M

NET

-$1.9M

7 insiders
2026.09.29
ModerateAnalyze
#02CRM

SALESFORCE COM INC

Top insider: Kirk David Blair

Buy Volume

$999.5K

NET

+$999K

5 insiders
2026.09.22
ModerateAnalyze
#03CME

CME GROUP INC

Top insider: SHEPARD WILLIAM R

Buy Volume

$78.6K

NET

-$61K

13 insiders
2026.09.25
WatchAnalyze

How to read the signal

  • Start with the Form 4 transaction code, then separate voluntary trades from compensation mechanics.
  • Compare buy volume against sell volume to determine whether capital is entering or leaving the stock.
  • Weight executive rank, transaction size, active insider count, and remaining ownership before drawing conclusions.
  • Use footnotes to identify 10b5-1 plans, tax withholding, gifts, trusts, or non-market transfers.

Insider Buying Signals — Frequently Asked Questions

>Is insider buying bullish?

Open-market insider buying is usually bullish because the insider is voluntarily putting personal capital at risk. The signal is strongest when the buyer is a senior executive and net flow is positive.

>What Form 4 code means insider buying?

Code P on Form 4 usually identifies an open-market purchase. It should be separated from option exercises, grants, and other compensation mechanics.

>What makes an insider buying signal strong?

Large dollar value, multiple active insiders, C-suite participation, and positive net capital flow all make the signal stronger.