London Stock Exchange (LSE) · AIM and the LSE small-cap segments · below €300M
UK Microcap Stocks Screener
Screen UK microcap stocks below roughly €300M (about £250M) on the London Stock Exchange: AIM growth companies and Main Market small caps that most screeners skip.
What makes UK microcaps worth screening
- London has one of the largest populations of small listed companies in Europe, and many have zero to two analysts, so prices lean on information that screening can surface early
- UK-resident investors can hold qualifying AIM shares in an ISA, and some AIM shares qualify for Business Property Relief, which creates steady domestic demand for the segment
- The sector mix differs from the FTSE 100: mining and exploration, specialist healthcare and biotech, software, and niche industrials and services make up much of the small-cap end
- Liquidity is the main risk: bid-ask spreads on the smallest names can be several percent, so market cap and volume filters matter as much as valuation filters
Where UK microcaps are listed
AIM and the LSE small-cap segments
Part of London Stock Exchange (LSE). Most UK companies below €300M market cap are listed on this alternative or growth segment — lighter listing requirements, same exchange oversight, and GBP-denominated trading.
Exchange code in ScreenerHero: LSE
How to screen UK microcap stocks
1. Set exchange + market cap
Select LSE in the exchange filter. Set market cap maximum to €300M (or the GBP equivalent — equivalent in your target range). Sort by market cap ascending to start from the smallest names.
2. Apply quality filters
Add ROE > 8% and positive profit margin to filter the profitable subset of the microcap universe. Debt/equity below 1.5 removes overleveraged names. This combination narrows the universe to companies worth deeper analysis.
3. Find the cheapest
Sort by P/E or EV/EBITDA ascending within your quality-filtered list. Click any result to open the full instrument page — price history, fundamentals breakdown, and upcoming events.
Screen UK microcap stocks now
Filter by P/E, ROE, EV/EBITDA, margins, beta, and dividend yield across all London Stock Exchange (LSE) listings below €300M. Free, no account needed.
Common questions
How many UK microcap stocks can I screen?
Roughly 590 of the 1,300+ active LSE instruments in ScreenerHero have a market cap below €300M. The count moves with prices and listings, so treat it as an order of magnitude.
What sectors are UK microcaps concentrated in?
Mining and resources, healthcare and biotech, technology and software, and specialist financial and industrial services. Pre-revenue exploration and biotech names will fail most fundamental filters, which is why profitability and balance-sheet filters are a useful first pass.
How do I screen UK microcap stocks in ScreenerHero?
Select LSE in the exchange filter and set the market cap maximum to €300M. Then add quality filters such as positive ROE, debt/equity below 1 and a minimum revenue. Prices are in pence (GBp), so compare ratios rather than raw prices.
Can I screen UK microcaps alongside other European markets?
Yes — the ScreenerHero screener lets you select multiple exchanges simultaneously. Combine LSE with other European exchanges and apply the same market cap maximum to run cross-country microcap screens with identical fundamental filters.
Related screeners
Other country microcap screeners:
UK microcaps. Screened in seconds.
The London Stock Exchange (LSE) companies below €300M that major screeners miss. Dense tables, fast filters, all active listings — including the ones with no analyst coverage. Free, no account needed. Lifetime access is a one-time payment — no subscription.