Investment trust
IEM Impax Environmental Markets PLC
ISIN GB0031232498London Stock Exchange: IEM
- Investment trusts
- Investment trust
- ISA
- SIPP
Latest close
LSE£4.24
on
As of , at least 15 min delayed
At a glance
As of 13/11/2026, IEM (Impax Environmental Markets PLC, ISIN GB0031232498) closed at £4.24 on the London Stock Exchange. Over the five years to 13/11/2026 its price changed by −24.3% (income paid out is not included), or −40.9% after UK CPIH inflation.
Past returns
- 1 year to 13/11/2026
- +6.9%
- +3.1% after inflation (UK CPIH)
- 3 years to 13/11/2026
- +19.1%
- +7.6% after inflation (UK CPIH)
- 5 years to 13/11/2026
- −24.3%
- −40.9% after inflation (UK CPIH)
£1,000 put in five years ago would have been worth about £757 on 13/11/2026 — about £591 in today’s spending power, once price rises are taken out. Past performance is not a guide to future returns.
Returns: worked out from recorded daily closes. Inflation: UK CPIH, latest month published.
How we work it out:ReturnsReturns after inflationTotal returnReal returnCPIH
Calendar-year and 12-month returns
Calendar-year returns of Impax Environmental Markets PLC in pounds (price only, income paid out not included): 2022 −23.3%, 2023 −4.6%, 2024 −2.7%, 2025 +2.4%; 2026 to 13/11/2026 +6.4%. Returns of Impax Environmental Markets PLC in pounds (price only, income paid out not included) over the 12 months to 30/09/2026: +10.4%; to 30/09/2025: +3.6%; to 30/09/2024: +6.1%; to 30/09/2023: −6.3%; to 30/09/2022: −24.0%.
| Year | Return | After inflation | Return shown as a bar |
|---|---|---|---|
| to | +6.4% | +3.0% | |
| to | +2.4% | −1.1% | |
| to | −2.7% | −6.1% | |
| −4.6% | −8.4% | ||
| −23.3% | −29.8% |
| 12 months to | Return | After inflation |
|---|---|---|
| from | +10.4% | +6.5% |
| from | +3.6% | −0.5% |
| from | +6.1% | +3.4% |
| from | −6.3% | −11.9% |
| from | −24.0% | −30.1% |
As of , inflation: UK CPIH
How we work it out:Calendar-year returnsWhat a calendar-year return isAccumulating and distributing
Risk: volatility and largest fall
Volatility (annualised)
19.8%over 5 years
| 1 year | 19.1% |
|---|---|
| 3 years | 16.9% |
| 5 years | 19.8% |
Annualised from weekly returns. Higher means bumpier.
- Largest fall since November 2021
- −43.4%
- From to
- Lowest 12-month return
- −25.7%
- 12 months to
- Highest 12-month return
- +35.4%
- 12 months to
- Below its highest weekly close since November 2021
- 26.4%
- High of , latest
In words: Volatility of Impax Environmental Markets PLC in pounds, annualised from weekly returns to 13/11/2026: 19.1% over 1 year, 16.9% over 3 years, 19.8% over 5 years. Largest fall in the price of Impax Environmental Markets PLC since November 2021, in pounds: −43.4% from 19/11/2021 to 11/04/2025. The lowest 12-month return of Impax Environmental Markets PLC in pounds (price only, income paid out not included) since January 2021 was −25.7% (12 months to 16/12/2022); the highest was +35.4% (12 months to 10/04/2026). On 13/11/2026 the price of Impax Environmental Markets PLC was 26.4% below its highest weekly close since November 2021 (19/11/2021), in pounds.
As of , price only — income paid out is not included
How we work it out:Risk figuresFallsVolatilityLargest fall
In plain English
Impax Environmental Markets PLC 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.
Key facts
- Ticker
- IEM
- ISIN
- GB0031232498
- 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 usually be held in
- ISA and SIPP
- Check with your platform: each decides which funds it offers.
- Currency hedged
- No
- Price currency
- Pounds (GBP)
- Category
- Investment trusts
Price chart
Over the last year, the closing price went from £3.94 on 14/11/2025 to £4.24 on 13/11/2026 (+7.6%). The lowest close shown was £3.86 on 21/11/2025 and the highest £4.71 on 19/06/2026.
One close a week. Before 31/07/2026 the closes are from the weekly price history for this listing; from then on, the closing prices we have recorded. Price only — income paid out is not included.
As of , at least 15 min delayed
Five years of prices, and after inflation
262 weekly closes, from 12/11/2021 to 13/11/2026. The same history in November 2026 pounds, adjusted with CPIH inflation.
Create a free account to see the 5-year price chart and the after-inflation chart
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How we work it out:Prices and returnsNAV and price
Risk and return in depth
Sharpe, Sortino and Calmar ratios
Sharpe, Sortino and Calmar ratios over 1, 3 and 5 years, from weekly returns in pounds.
With a free accountRolling returns
The full range of 254 rolling 12-month returns since January 2021, and of 150 rolling three-year returns, in pounds, with how often they were above zero.
With a free accountLargest falls and recoveries
The largest fall since November 2021, in pounds, with how many weeks it 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 13/11/2026 (154 weeks).
Pro
Pro — currently by invitation
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 IEM?
The ISIN of IEM is GB0031232498. An ISIN identifies one exact share class of a fund; IEM is its ticker on the London Stock Exchange.
What were IEM’s returns in each of the last five years?
Calendar-year returns of IEM in pounds (price only, income paid out not included): 2022 −23.3%, 2023 −4.6%, 2024 −2.7%, 2025 +2.4%; 2026 to 13/11/2026 +6.4%. Past performance is not a guide to future returns.
How has IEM done after inflation?
Over the five years to 13/11/2026 IEM’s price changed by −24.3% (income paid out is not included), or −40.9% after UK CPIH inflation. Past performance is not a guide to future returns.
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Fund documents and methods
Methodology:ReturnsCategoriesAll methods
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