Dilution happens when a company issues new shares — through offerings, warrants, convertible notes, or employee stock plans. Each new share spreads the same earnings, votes, and asset claims across a larger pool, lowering the value of every existing share.
For micro-cap and small-cap stocks, dilution can be the single biggest driver of price action. A company that prints 30% more shares in a quarter often sees its stock follow that math down.
The math, in one example
Imagine a company with 10M shares earning $1M a year — $0.10 EPS. It raises cash by selling 3M new shares at $2 each. Earnings don't change overnight, but EPS drops to $1M / 13M = $0.077, a 23% haircut.
If the stock was trading at 20× earnings ($2.00), the same multiple now implies $1.54. That gap is why offerings so often gap the chart down on announcement.
Dilutive vs accretive
Not every share issuance is bad. Issuing stock to acquire a business that adds more EPS than the new share count costs is accretive — your slice shrinks, but the pie grows faster.
Predatory dilution is the opposite: cash raised funds operating losses, executive comp, or debt service with no return on that capital. Small-caps below $5 are overwhelmingly the second kind.
What to track
Shares outstanding, float, and authorized share count are the three numbers that matter. Authorized is the ceiling, outstanding is what exists, float is what trades freely.
Also watch the diluted share count in the 10-Q — it includes the impact of warrants, options, and convertibles 'as if' exercised. A 20M float with 60M diluted shares is a warning, not a green light.
Use Stocks Leak's share-count history chart on any ticker page to see the trend at a glance.
Common mistakes
Looking only at market cap. A $50M company with 50M shares is very different from a $50M company with 500M shares about to do a reverse split.
Ignoring the S-3 shelf. If the shelf is in place, dilution can hit any morning with no warning beyond a 424B5 filing.