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4BASEBIO UK SOCIETAS (4BB) fair value: what the stock is really worth

As of Nov 10, 2026: fair value (intrinsic value) of 4BASEBIO UK SOCIETAS stock £3.21, price £5.25, that is 38.9% below the price, quality 24 out of 100. Rating: strongly overvalued. The value is an estimate: none of our valuation models currently carries, it draws on revenue and assets compared with similar companies. Updated daily.

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Healthcare GB · ISIN GB00BMCLYF79

4U 4BASEBIO UK SOCIETAS logo Thin data Nov 10, 2026

4BASEBIO UK SOCIETAS

4BB · LSE
Very expensive, weak quality

Our calculation puts a fair price 39% below what the stock costs today.

Expensive Growth (revenue 5y +29.7 %/yr in GBP)
Revenue last quarter 78% below a year ago.
Fair value £3.21 · Strongly overvalued
Quality 24/100
High debt
Negative free cash flow
Trails peers (0/7)
Narrow moat 8/100 · thin data
Thin data
Estimate
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26 valuation models 8 families, DCF to NCAV 37 quality factors margins, balance sheet, cashflow, debt 6 AI factors moat, what no ratio measures 2,000+ data points verified, per stock, median

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Price vs Fair Value

£18.20 £4.00 Fair Value £3.21 Aug 2021 Nov 2026

White line = price, green steps = our fair value per fiscal year. As of Nov 10, 2026.

How to read this chart

60‑month range £4.00 – £18.20 · fair‑value band £2.41 – £4.01 · the £5.25 price screens above the £3.21 fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). As of Nov 10, 2026.

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Company profile

4basebio PLC, together with its subsidiaries, engages in the research, development, manufacturing, and sale of synthetic DNA and RNA products in Europe, the United States, and internationally.

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It offers hpDNA, a double stranded linear DNA for viral and non-viral vector applications; opDNA, a partially opened, linear, double stranded DNA for in vitro transcription processes that produce mRNA for use in vaccines and therapeutics; oeDNA, a linear, double stranded DNA for genome editing; osDNA, a DNA product that incorporates nucleotide modifications within the DNA backbone; and Hermes, a nanoparticle platform.

The company also provides custom pegRNA and sgRNA manufacturing; and nanoparticle formulation services. Its products are used in mRNA vaccines and therapies, viral vectors, gene editing, DNA vaccines, and non-viral delivery applications.

The company was formerly known as 4basebio UK Societas and changed its name to 4basebio PLC in July 2021. 4basebio PLC was founded in 2008 and is headquartered in Cambridge, the United Kingdom.

Stock analysis

4BASEBIO UK SOCIETAS (4BB) currently trades at £5.25, while our estimate is £3.21, 39% below the price, so the stock looks overvalued today.

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Valuation

None of our valuation models currently carries for this company, usually because of losses or heavy investment. The estimate draws on revenue and assets compared with similar companies and is less precise than a model-based fair value.

Scenario range: £2.41 (bear) to £4.01 (bull), the price of £5.25 sits above it. Bear and bull are the same models on cautious and optimistic assumptions, a range, not a price target.

Quality & growth

The Quality Score stands at 24/100 (below-average quality), in the Healthcare sector.

Expensive Growth: The company is growing, but growth may require heavy reinvestment or weak cash conversion.

4BASEBIO UK SOCIETAS reported revenue of £1.7M in FY2025 versus £338K in FY2021, a compound +49.6%/yr. Reported net income was −£16.9M in FY2025.

Key figures

Market cap £81.6M Micro · EPS (TTM) £−1.16 · Return on equity −178% · Return on assets (EBIT) −45.0% (5-year average) · Operating margin −3,386% · Revenue (TTM) £781K · Revenue growth (YoY) −77.7% · Free cash flow −£15.2M.

Competitive moat

Our AI-assisted moat analysis scores the competitive advantage at 8 out of 100 (low confidence).

What moves the price

The share trades about 33% below its 52-week high and 21% above its 52-week low, currently above its 200-day average.

For context, the median of 10 Healthcare peers we cover trades at −7% fair-value upside, at −39%, 4BB screens richer than that median.

Fair Value

Bear £2.41 Fair Value £3.21 Bull £4.01
Price £5.25 · Downside -38.9%
Estimate. None of our valuation models currently carries for this company, usually because of losses or heavy investment. The estimate draws on revenue and assets compared with similar companies and is less precise than a model-based fair value.

Quality Score breakdown

Overall quality 24/100

It rates the business: profits, how they develop, real cash, balance sheet, investing and share count.

Profitability 1
How much profit the company makes from its sales and capital
Quality Growth 54
Are margins and returns getting better?
Cashflow 8
Do the profits arrive as real cash?
Financial strength 41
Debt, balance sheet and risk of trouble
Investment 13
Does it invest with discipline instead of growing at any price?
Low Volatility 65
How calm the share price moves, does not count
Price momentum 39
Price momentum of the last 3 to 12 months, does not count
Near the 52-week high 18
Distance to the 52-week high, does not count
New shares 39
Buys back shares or issues new ones?

Open the full quality analysis →

Revenue & earnings trend

Growth Quality ⓘGrowth is valuable only when reinvestment earns attractive returns (Aswath Damodaran): sustainable growth depends on return on capital, reinvestment and efficiency. Basis: total company revenue over the periods shown on the cards (3Y/5Y/all years), not per share, so a merger can show up as a growth jump; per-share earnings growth is in the value-creation card. 38/100
The company is growing, but growth may require heavy reinvestment or weak cash conversion.
Revenue growth 1 year
+81.5%
Revenue growth 3 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+84.9%
Revenue growth 5 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+29.7%
Start year 2020 (pandemic)
Revenue growth 6 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+42.5%
Profit margin (trend) ⓘOperating margin then vs now, from reported annual statements. A falling margin after a boom year is the classic peak-earnings signal: the growth rate then leans on an inflated base.
−134.6% (2020) → −988.0% (2025)
What shareholders gained per year ⓘWe only publish this rate when it is defensible. Reason: fiscal 2025 is a loss year, no rate is defined from a loss
not computed

4BB screens overvalued: fair value 39% below the price. Compare with Vertex Pharmaceuticals Incorporated →

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Peer GroupⓘHow this stock ranks against its industry: the green marker is this stock, the band is the typical 25–75% peer range, and the tick is the median.Biotechnology · 849 stocks

Beats the industry median on 0/6 measures
Overall it trails its industry peers.
Valuation
Quality Score 24 · Bottom 25%
Fair Value upside −38.9% · Below median
Profitability
Return on assets −57.2% · Bottom 25%
Growth and dividend
Revenue growth (quarter YoY) −77.7% · Bottom 25%
Balance sheet
Debt / equity 1.57× · Highest 25%

Valuation Multiplesvs Biotechnology median · lower = cheaper

P/B 8.07× · Priciest 25%

Strength profile in five axes (Snowflake)

VALUEFUTUREPASTHEALTHDIVIDEND
This stock
VALUEFUTUREPASTHEALTHDIVIDEND
Sector peers
VALUE (fair-value potential)0 · sector 0
FUTURE (revenue growth)0 · sector 0
PAST (return on equity)0 · sector 0
HEALTH (low debt)22 · sector 96
DIVIDEND (yield)0 · sector 20

VALUE 0: the price sits above our fair-value range.

Context: sector, industry, market

Values & ESG

Does this company touch areas you may want to avoid? The classification is inferred from sector and industry.

None of the checked exposures detected

Similar stocks

10 more Biotechnology stocks, each showing price versus our Fair Value estimate.

Stock Price Fair Value vs Fair Value Compare
Regeneron Pharmaceuticals, Inc REGN $916.06 $1,275 +39% vs 4BB
Samsung Biologics Co 207940 1,468,000 KRW 1,661,000 KRW +13% vs 4BB
Vertex Pharmaceuticals Incorporated VRTX $547.89 $601.80 +10% vs 4BB
Genmab A/S GMAB kr 3,581 kr 3,880 +8% vs 4BB
argenx SE ARGX $971.55 $908.40 −7% vs 4BB
CSL Limited CSL A$201.68 A$181.40 −10% vs 4BB
Moderna, Inc MRNA $250.83 $158.70 −37% vs 4BB
BeOne Medicines AG 6160 HK$252.20 HK$152.80 −39% vs 4BB
Celltrion, Inc 068270 203,000 KRW 74,945 KRW −63% vs 4BB
Royalty Pharma plc RPRX $69.45 $19.01 −73% vs 4BB

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4BASEBIO UK SOCIETAS: fair value per Fair Value Calculator

Cite: Fair Value Calculator (2026). "4BASEBIO UK SOCIETAS Fair Value". https://www.fairvalue-calculator.com/stock/4BB

Frequently asked questions

Is 4BASEBIO UK SOCIETAS (4BB) overvalued or undervalued?
As of Nov 10, 2026, our estimate of fair value is £3.21 versus a price of £5.25, about 39% lower (overvalued).
What is the fair value of 4BB?
Our estimate for 4BASEBIO UK SOCIETAS is £3.21 (as of Nov 10, 2026), built from audited fundamentals. The current price: £5.25.
What is the quality score of 4BB?
4BASEBIO UK SOCIETAS has a Quality Score of 24/100. It measures business quality (profitability, growth, cash flow, balance-sheet strength, investment discipline, share issuance). Market factors such as price momentum and volatility do not enter the number; they are shown separately in the detail view.
What is the price target for 4BASEBIO UK SOCIETAS (4BB)?
Our calculated price target is the estimate of £3.21 (as of Nov 10, 2026). Cautious scenario £2.41, optimistic scenario £4.01. It is an estimate from revenue and assets compared with similar companies, because none of our valuation models currently carries, not an analyst target.
What is the 4BASEBIO UK SOCIETAS stock forecast for 2026?
Our estimate puts fair value at £3.21, about 39% lower versus a price of £5.25 (overvalued). Cautious scenario £2.41, optimistic scenario £4.01. The calculation is refreshed regularly with new filings.
What is the revenue of 4BASEBIO UK SOCIETAS (4BB)?
4BASEBIO UK SOCIETAS reported trailing-twelve-month revenue of about £781K (latest available figure, as of Nov 10, 2026).
What is the intrinsic value of 4BASEBIO UK SOCIETAS (4BB)?
Intrinsic value and fair value mean the same thing: what the business is worth on its numbers, independent of the share price. For 4BASEBIO UK SOCIETAS it is £3.21 per share (as of Nov 10, 2026), against a price of £5.25.
Is 4BASEBIO UK SOCIETAS stock overvalued or undervalued in 2026?
As of Nov 10, 2026, 4BB trades above its calculated fair value: price £5.25, fair value £3.21, a gap of about −39% (overvalued). The calculation is refreshed with each new quarterly report, so the verdict can change during the year.
Is fair value the same as the market price of 4BB?
No. The price is what the market pays today (£5.25); the fair value is what the company's own numbers justify (£3.21). For 4BASEBIO UK SOCIETAS the two are £2.04 per share apart. That gap is exactly why we show both numbers side by side.
How much is 4BASEBIO UK SOCIETAS worth?
The market values 4BASEBIO UK SOCIETAS at about £81.6M (market capitalisation, as of Nov 10, 2026). Per share that is £5.25; our models calculate a fair value of £3.21 per share.
What do the bullish and bearish scenarios say about 4BB?
Our models span a range for 4BASEBIO UK SOCIETAS: cautious scenario £2.41, base £3.21, optimistic £4.01 per share (as of Nov 10, 2026, price £5.25). The range comes from different growth and margin assumptions, not from analyst opinions.
How solid is the balance sheet of 4BASEBIO UK SOCIETAS (4BB)?
Balance-sheet figures for 4BASEBIO UK SOCIETAS (as of Nov 10, 2026): return on equity −178.0%, debt of 1.57 per unit of equity. They feed the Quality Score of 24/100, which measures business quality independently of the share price.
How far is 4BB from its 52-week high?
4BASEBIO UK SOCIETAS trades at £5.25, about 33% below its 52-week high of £7.85 and 21% above the low of £4.35 (as of Nov 10, 2026). Distance from the high says nothing about value: that is what the fair value of £3.21 is for.
Which stocks are comparable to 4BASEBIO UK SOCIETAS?
From the same area (Healthcare) we also value Vertex Pharmaceuticals Incorporated, Moderna, Inc, Regeneron Pharmaceuticals, Inc, CSL Limited, among others. Each of them has its own fair-value calculation on this site using the same models, so the comparison is like for like.
Is 4BASEBIO UK SOCIETAS stock attractive at the current price?
The data as of Nov 10, 2026: price £5.25, calculated fair value £3.21 (−39%), Quality Score 24/100. Whether that fits your horizon and risk tolerance is your call. We provide the calculation, not investment advice.
Is it still worth investing in stocks now?
The global stock market currently sits 15.1% above its aggregate fair value. 4BASEBIO UK SOCIETAS itself currently trades above fair value. An expensive market is no reason to stay out and no reason to buy everything at once: keep a broad savings plan running, buy single stocks only with money you can do without, and hold part of your money liquid while the market is high. The full picture including sectors is on is it worth investing now.
What is the share price of 4BASEBIO UK SOCIETAS (4BB)?
The closing price on Nov 10, 2026 was £5.25. Our estimate is £3.21, about 39% lower (overvalued). We carry closing prices from our data provider, not a live tick.
What should I pay attention to with 4BASEBIO UK SOCIETAS right now?
The price sits above even our optimistic bull case (£4.01). The favourable scenario is already priced in. Weak quality (24/100) and above fair value at the same time, the margin of safety is missing on both counts. The large gap to fair value rests on thin data (low evidence): fewer applicable models and a shorter history. Read it with extra caution.

Key figures of 4BASEBIO UK SOCIETAS

How large is the market capitalisation of 4BASEBIO UK SOCIETAS (4BB)?
The market capitalisation of 4BASEBIO UK SOCIETAS is £81.6M. The stock-market value of the whole company: share price times number of shares. It is what the market asks for the entire business today.
What are the earnings per share of 4BASEBIO UK SOCIETAS (4BB)?
Earnings per share at 4BASEBIO UK SOCIETAS are £−1.16. Earnings per share over the last twelve months: total profit spread across every single share.
What is the return on equity of 4BASEBIO UK SOCIETAS (4BB)?
The return on equity (ROE) of 4BASEBIO UK SOCIETAS is −178% (last twelve months). Profit relative to shareholders' equity, how efficiently the company works with its owners' money.
What is the EBIT return on assets of 4BASEBIO UK SOCIETAS (4BB)?
On an EBIT basis the return on assets of 4BASEBIO UK SOCIETAS is −45.0% (avg 5y). Operating profit (EBIT) relative to everything the company owns, as a multi-year average. It describes the business model rather than one good or bad year.
What is the operating margin of 4BASEBIO UK SOCIETAS (4BB)?
The operating margin of 4BASEBIO UK SOCIETAS is −3,386% (last twelve months). Profit from the core business (before interest and taxes) relative to revenue.
How fast is revenue growing at 4BASEBIO UK SOCIETAS (4BB)?
Revenue at 4BASEBIO UK SOCIETAS is growing −77.7% versus a year earlier (3y avg +84.9%). How much revenue grew versus a year earlier (YoY). The 3-year average next to it puts the single year in context.
How much free cash flow does 4BASEBIO UK SOCIETAS (4BB) generate?
The free cash flow of 4BASEBIO UK SOCIETAS is −£15.2M (fiscal year 2025). The cash truly left after running and investing in the business, this is what pays dividends and buybacks.
How much net cash does 4BASEBIO UK SOCIETAS (4BB) hold?
4BASEBIO UK SOCIETAS holds more cash than debt, £1.3M net (fiscal year 2025). The company holds more cash than debt, a safety cushion.
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