Insider Selling Signals
Insider selling is useful only after filtering out noise. InsiderAlpha separates voluntary Code S sales from tax withholding, grants, option exercises, and plan-based liquidity to show where real selling pressure is concentrated.
- Measures
- Open-market sales
- Strong pattern
- Large discretionary sale that meaningfully reduces ownership
- Weak pattern
- 10b5-1 sale, tax withholding, or small diversification trade
Live Insider Selling Board
Revalidates hourlyAMAZON COM INC
Top insider: BEZOS JEFFREY P
$347.7M
-$347.7M
GENERAL MTRS CO
Top insider: Barra Mary T
$49.0M
-$49.0M
MICRON TECHNOLOGY INC
Top insider: MEHROTRA SANJAY
$38.2M
-$38.2M
VISA INC
Top insider: MAHON TULLIER KELLY
$20.9M
-$20.9M
NETFLIX INC
Top insider: SARANDOS THEODORE A
$13.0M
-$13.0M
ADVANCED MICRO DEVICES
Top insider: GRASBY PAUL DARREN
$11.4M
-$11.4M
MICROSOFT CORP
Top insider: Althoff Judson
$7.3M
-$7.3M
MARVELL TECHNOLOGY GROU
Top insider: Koopmans Chris
$3.6M
-$3.6M
CLEAN HARBORS INC
Top insider: GERSTENBERG ERIC W
$1.1M
-$1.1M
QUALCOMM INC
Top insider: ACE HEATHER S
$878.7K
-$879K
DELL INC
Top insider: Radakovich Lynn Vojvodich
$836.6K
-$837K
SANDISK CORP
Top insider: Shek Bernard
$697.3K
-$697K
APPLE INC
Top insider: Newstead Jennifer
$442.9K
-$443K
GOOGL
Top insider: Saraci Marsida
$176.9K
-$177K
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.
Related concepts
Insider Selling Signals — Frequently Asked Questions
>Is insider selling bearish?
Not always. Planned 10b5-1 sales, tax withholding, and small diversification sales are weaker signals than large discretionary open-market sales.
>What Form 4 code means insider selling?
Code S usually identifies an open-market sale. Analysts should still read footnotes to check whether the sale was planned under Rule 10b5-1.
>What makes an insider selling signal strong?
The signal is stronger when a senior executive sells a large percentage of remaining ownership, when multiple executives sell, and when selling exceeds buying volume.