Share Dilution

Share dilution is the drop in existing owners' percentage stake when a company issues new shares.

Part of the Growth & Capital Returns course · Lesson 8 of 26

Formula

(New Shares Issued / Total Shares Before Issuance) x 100%

What it is

Share dilution happens when a company creates new shares, spreading ownership across a larger total. Common causes are stock-based compensation, secondary offerings, and the conversion of options or convertible bonds. Each existing share then represents a smaller slice of the company.

Why it matters

Dilution reduces existing shareholders' claim on earnings, dividends, and votes, and it can quietly erode per-share value even when the business grows. Watching the share count over time, not just headline profit, reveals whether growth is reaching shareholders or being offset by new issuance.

How it's calculated

Measure it as the percentage change in shares outstanding over a period; the gap between basic and diluted EPS also shows the potential dilution embedded in outstanding options and convertibles.

How Quintarthai uses it

Quinn flags rising share counts in its analysis, and the trend in shares outstanding is tracked on each company page alongside diluted EPS on the Ratios tab. Open a company page in the app to review it.

Cross-border note. Both US (EDGAR) and Canadian (SEDAR+) issuers must disclose new share issuance, but Canadian financings sometimes use flow-through shares or private placements that have no direct US equivalent.

FAQ

Is all dilution bad?

Not necessarily. If newly issued shares fund investments that grow profit faster than the share count rises, per-share value can still increase; dilution is only harmful when growth doesn't keep up.

How can I spot dilution on a company's filings?

Track the shares-outstanding figure across several years; a steadily rising count, especially without buybacks to offset it, indicates ongoing dilution.

See Share Dilution on a real company

Open any stock in Quintarthai and explore it live across the screener and company pages.

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