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Fundology

Investment trust

GCL Geiger Counter Limited

ISIN GB00B15FW330London Stock Exchange: GCL

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Latest close

LSE

£0.55

on

Source: TradingView, as of , at least 15 min delayed

At a glance

As of 30/09/2026, GCL (Geiger Counter Limited, ISIN GB00B15FW330) closed at £0.55 on the London Stock Exchange. Over the five years to 30/09/2026 its price changed by +10.0% (income paid out is not included), or −13.0% after UK CPIH inflation.

Past returns

Change in the fund’s price, after its ongoing charges. Any income paid out is not included. Periods to .
1 year to 30/09/2026
−13.2%
−15.6% after inflation
3 years to 30/09/2026
+20.2%
+9.2% after inflation
5 years to 30/09/2026
+10.0%
−13.0% after inflation

£1,000 put in five years ago would have been worth about £1,100 on 30/09/2026 — about £870 in today’s spending power, once price rises are taken out. Past performance is not a guide to future returns.

Returns: Fundology, from recorded daily closes. Inflation: ONS CPIH, latest month published.

How we work it out:ReturnsReturns after inflationTotal returnReal returnCPIH

Calendar-year and 12-month returns

Calendar-year returns of Geiger Counter Limited in pounds (price only, income paid out not included): 2022 −19.3%, 2023 +26.3%, 2024 −13.9%, 2025 +20.4%; 2026 to 30/09/2026 −1.8%. Returns of Geiger Counter Limited in pounds (price only, income paid out not included) over the 12 months to 30/09/2026: −6.8%; to 30/09/2025: +29.7%; to 30/09/2024: −12.5%; to 30/09/2023: +13.0%; to 30/09/2022: −9.8%.

Calendar-year returns of GCL, in pounds (price only — income paid out is not included), to 30/09/2026
YearReturnAfter inflation
to −1.8%−4.5%
+20.4%+16.3%
−13.9%−16.8%
+26.3%+21.3%
−19.3%−26.2%
Returns of GCL over 12-month periods to 30/09/2026, in pounds (price only — income paid out is not included)
12 months toReturnAfter inflation
from −6.8%Not available
from +29.7%+24.6%
from −12.5%−14.7%
from +13.0%+6.3%
from −9.8%−17.1%

Source: Fundology, from recorded closes and the data vendor’s weekly price history, as of , inflation: ONS CPIH

How we work it out:Calendar-year returnsWhat a calendar-year return isAccumulating and distributing

Risk: volatility and largest fall

How far the price has swung and fallen. The same record the returns come from, in pounds.

Volatility (annualised)

50.5%over 5 years

Volatility, annualised from weekly returns, by period
1 year47.6%
3 years43.6%
5 years50.5%

Annualised from weekly returns. Higher means bumpier.

Largest fall since October 2021
−60.0%
From to
Lowest 12-month return
−50.0%
12 months to
Highest 12-month return
+141.8%
12 months to
Below its highest weekly close since October 2021
34.9%
High of , latest

In words: Volatility of Geiger Counter Limited in pounds, annualised from weekly returns to 30/09/2026: 47.6% over 1 year, 43.6% over 3 years, 50.5% over 5 years. Largest fall in the price of Geiger Counter Limited since October 2021, in pounds: −60.0% from 15/04/2022 to 04/04/2025. The lowest 12-month return of Geiger Counter Limited in pounds (price only, income paid out not included) since January 2021 was −50.0% (12 months to 14/04/2023); the highest was +141.8% (12 months to 17/04/2026). On 30/09/2026 the price of Geiger Counter Limited was 34.9% below its highest weekly close since October 2021 (23/01/2026), in pounds.

Source: Fundology, from recorded closes and the data vendor’s weekly price history, as of , price only — income paid out is not included

How we work it out:Risk figuresFallsVolatilityLargest fall

In plain English

Geiger Counter Limited is an investment trust.

You buy and sell it through a share-dealing account or platform during stock-market hours, like a share.

Investment trusts: Companies on the stock exchange that invest in other assets. Their share price can be above or below the value of what they own.

Terms:Investment trustShare classISIN

Key facts

Ticker
GCL
ISIN
GB00B15FW330
Structure
Investment trust
A company listed on the stock exchange that invests in other assets; its price can differ from the value of what it holds.
Domicile
United Kingdom
Can be held in
ISA and SIPP
Currency hedged
No
Price currency
Pounds (GBP)
Category
Investment trusts

Price chart

Closing price
£0.55+0.0% since 31/07/2026 · closing price
GCL closing price: £0.55 on 31/07/2026, £0.55 on 30/09/2026 (+0.0%); low £0.55, high £0.67.

Since 31/07/2026, the closing price went from £0.55 on 31/07/2026 to £0.55 on 30/09/2026 (0.0%). The lowest close shown was £0.55 on 31/07/2026 and the highest £0.673 on 28/08/2026.

Chart: closing prices we have recorded since 31/07/2026. Price only — income paid out is not included, so the line can end below the total return above.

Source: TradingView, as of , at least 15 min delayed

Five years of prices, and after inflation

10 weekly closes, from 31/07/2026 to 30/09/2026. The same history in September 2026 pounds, adjusted with ONS CPIH inflation.

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How we work it out:Prices and returnsNAV and price

Risk and return in depth

Ratios that weigh return against its ups and downs, every rolling period rather than a few fixed ones, and each large fall with how long it took to recover.

  • Sharpe, Sortino and Calmar ratios

    Sharpe, Sortino and Calmar ratios over 1, 3 and 5 years, from weekly returns in pounds.

    With a free account

  • Rolling returns

    The full range of 248 rolling 12-month returns since January 2021, and of 144 rolling three-year returns, in pounds, with how often they were above zero.

    With a free account

  • Largest falls and recoveries

    The 3 largest falls since October 2021, in pounds, with how many weeks each took to reach its low and to recover.

    With a free account

Create a free account to see the risk ratios, every rolling return and each large fall and its recovery

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  • Moves compared with a similar fund

    Correlation and beta of weekly returns in pounds against iShares Core MSCI World UCITS ETF, over the three years to 30/09/2026 (151 weeks).

    Pro

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Pro includes moves against a comparable fund

Pro is open by invitation while it is being built. There is nothing to buy. To ask about access, email [email protected].

Questions people ask

What is the ISIN of GCL?

The ISIN of GCL is GB00B15FW330. An ISIN identifies one exact share class of a fund; GCL is its ticker on the London Stock Exchange.

What were GCL’s returns in each of the last five years?

Calendar-year returns of GCL in pounds (price only, income paid out not included): 2022 −19.3%, 2023 +26.3%, 2024 −13.9%, 2025 +20.4%; 2026 to 30/09/2026 −1.8%. Past performance is not a guide to future returns.

How has GCL done after inflation?

Over the five years to 30/09/2026 GCL’s price changed by +10.0% (income paid out is not included), or −13.0% after UK CPIH inflation. Past performance is not a guide to future returns.

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Sources and dates

Prices
London Stock Exchange closes via TradingView, at least 15 minutes delayed, latest
Returns
Fundology, from recorded closes
Calendar years, risk
Fundology, from recorded closes (weekly history from the data vendor where our record is short)
Inflation
ONS CPIH, latest month used August 2026
Identity
FCA Financial Instruments Reference Data System (FIRDS) and the issuer

Methodology:Data sourcesReturnsCategoriesAll methods

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