Why it matters
Smaller companies with room to grow ($0.3–2bn). Benchmark collections are a clean way to compare market leaders, index heavyweights and size segments without building a screen from scratch.
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Small Caps
Smaller companies with room to grow ($0.3–2bn).
Small-caps offer the highest growth potential and the highest risk — under-researched, more volatile, and periodically the source of the market’s biggest winners. This collection covers investable names between $300m and $2bn.
What to check next
Compare sector mix, valuation, quality and risk across the group rather than assuming larger companies are automatically safer.
Main risk
Large benchmark names can become crowded, expensive or overly exposed to one macro factor despite appearing diversified at first glance.
Showing the 40 largest of 3227 — sort or filter to explore the rest.
- RewardRiskYield1.1%
- RewardRiskYield4.9%
- RewardRiskYield0.0%
- RewardRisk
- RewardRiskYield0.0%
- RewardRisk
- RewardRiskYield0.0%
- RewardRiskYield2.6%
- RewardRisk
- RewardRiskYield4.7%
- RewardRisk
- RewardRiskYield1.2%
- RewardRisk
- RewardRisk
- RewardRiskYield8.1%
- RewardRiskYield3.8%
- RewardRisk
- RewardRiskYield0.3%
- RewardRiskYield12.4%
- RewardRiskYield4.8%
- RewardRisk
- RewardRiskYield3.0%
- RewardRiskYield7.9%
- RewardRiskYield1.4%
- RewardRiskYield2.8%
- RewardRiskYield0.0%
- RewardRisk
- RewardRisk
- RewardRiskYield1.6%
- RewardRiskYield9.0%
- RewardRiskYield2.3%
- RewardRisk
- RewardRiskYield0.0%
- RewardRiskYield0.0%
- RewardRiskYield0.0%
- RewardRiskYield9.6%
- RewardRisk
- RewardRiskYield1.9%
- RewardRisk
- RewardRisk
Related collections
Frequently asked questions
What is the Small Caps collection?
Smaller companies with room to grow ($0.3–2bn). It currently holds 3227 stocks, each rated by Openbook's Reward and Risk scores. Small-caps offer the highest growth potential and the highest risk — under-researched, more volatile, and periodically the source of the market’s biggest winners.
How are Small Caps stocks selected?
Constituents are chosen by a rules-based screen over the full UK and US common-stock universe, then ranked by market capitalisation.
How often is the Small Caps list updated?
It is rebuilt from live market data, so the constituents and their rankings update as prices and company fundamentals change — there is no fixed, hand-edited list.
How should I use the Reward and Risk ratings?
Openbook's Reward rating combines a stock's growth, momentum, profitability and valuation into a single 0–100 score, and the Risk rating scores financial strength, volatility and size. Use them to compare names within this theme — broadly, a higher Reward alongside a lower Risk is more attractive. They are quantitative research signals, not investment advice.
Openbook Reward and Risk ratings and factor scores are quantitative signals for research, not investment advice. Data may be delayed. Some US-listed names carry partial factor coverage.