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Fundology

ETF · iShares

CUKX iShares Core FTSE 100 UCITS ETF GBP (Acc)

ISIN IE00B53HP851London Stock Exchange: CUKXBlackRock, Inc.

Compare with another fund

Latest close

LSE

£218.40

on

Ongoing charge
0.07% a year
Fund size
£2.4bn

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

At a glance

As of 30/09/2026, CUKX (iShares Core FTSE 100 UCITS ETF GBP (Acc), ISIN IE00B53HP851) closed at £218.40 on the London Stock Exchange. Its ongoing charge is 0.07% a year (about £7 on £10,000). Over the five years to 30/09/2026 its total return was +79.9%, or +40.6% after UK CPIH inflation.

Past returns

Total return: the change in the fund’s value with any income reinvested, after its ongoing charges. Periods to .
1 year to 30/09/2026
+17.9%
+14.2% after inflation
3 years to 30/09/2026
+54.4%
+39.3% after inflation
5 years to 30/09/2026
+79.9%
+40.6% after inflation

£1,000 put in five years ago would have been worth about £1,799 on 30/09/2026 — about £1,406 in today’s spending power, once price rises are taken out. Past performance is not a guide to future returns.

Returns: TradingView (delayed data). 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 iShares Core FTSE 100 UCITS ETF GBP (Acc) in pounds (price, with income reinvested in the fund): 2022 +5.0%, 2023 +7.7%, 2024 +8.7%, 2025 +25.9%; 2026 to 30/09/2026 +9.9%. Returns of iShares Core FTSE 100 UCITS ETF GBP (Acc) in pounds (price, with income reinvested in the fund) over the 12 months to 30/09/2026: +18.0%; to 30/09/2025: +15.3%; to 30/09/2024: +12.9%; to 30/09/2023: +15.0%; to 30/09/2022: +1.5%.

Calendar-year returns of CUKX, in pounds (price, with income reinvested in the fund), to 30/09/2026
YearReturnAfter inflation
to +9.9%+6.8%
+25.9%+21.6%
+8.7%+5.0%
+7.7%+3.4%
+5.0%−3.9%
Returns of CUKX over 12-month periods to 30/09/2026, in pounds (price, with income reinvested in the fund)
12 months toReturnAfter inflation
from +18.0%Not available
from +15.3%+10.8%
from +12.9%+10.1%
from +15.0%+8.1%
from +1.5%−6.7%

Source: Fundology, from recorded closes, 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)

12.1%over 5 years

Volatility, annualised from weekly returns, by period
1 year11.8%
3 years11.0%
5 years12.1%

Annualised from weekly returns. Higher means bumpier.

Largest fall since October 2021
−9.2%
From to
Lowest 12-month return
−1.7%
12 months to
Highest 12-month return
+37.5%
12 months to
Below its highest weekly close since October 2021
2.5%
High of , latest

In words: Volatility of iShares Core FTSE 100 UCITS ETF GBP (Acc) in pounds, annualised from weekly returns to 30/09/2026: 11.8% over 1 year, 11.0% over 3 years, 12.1% over 5 years. Largest fall in the price of iShares Core FTSE 100 UCITS ETF GBP (Acc) since October 2021, in pounds: −9.2% from 08/04/2022 to 14/10/2022. The lowest 12-month return of iShares Core FTSE 100 UCITS ETF GBP (Acc) in pounds (price, with income reinvested in the fund) since July 2021 was −1.7% (12 months to 14/10/2022); the highest was +37.5% (12 months to 10/04/2026). On 30/09/2026 the price of iShares Core FTSE 100 UCITS ETF GBP (Acc) was 2.5% below its highest weekly close since October 2021 (07/08/2026), in pounds.

Source: Fundology, from recorded closes, as of , price, with income reinvested in the fund

How we work it out:Risk figuresFallsVolatilityLargest fall

Charges compared with similar funds

The ongoing charge is taken from the fund’s value every day, so the returns on this page are already after it. Platform and dealing fees are charged separately.
Ongoing charge
0.07%
a year
On £10,000
£7
a year, roughly
Over five years
£35
of £10,000, before growth
Among 32 UK share funds, share classes counted once
  • 6 charge less
  • 1 the same
  • 24 charge more

Ongoing charge of iShares Core FTSE 100 UCITS ETF GBP (Acc) 0.07% a year, as of 01/10/2026: 24 of the 31 other UK share funds charge more, 1 the same and 6 less (share classes counted once).

Source: Fund ongoing charges via TradingView, as of

A lower charge is not a promise of a higher return: what the fund holds matters more. Charges are the fund’s own published ongoing charges figure.

Read more:Ongoing charge (OCF)OCF and TERFee dragHow charges add up

In plain English

iShares Core FTSE 100 UCITS ETF GBP (Acc) is an exchange-traded fund (ETF) from iShares, launched in 2010.

It tracks the FTSE 100 — the 100 largest companies listed on the London Stock Exchange.

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

Its ongoing charge is 0.07% a year — about £7 a year on every £10,000 invested, taken from the fund's value rather than billed to you.

Income from its investments is reinvested inside the fund, so it shows up as a rising price rather than cash paid to you.

UK shares: Companies listed in the UK, such as those in the FTSE 100 and FTSE 250.

Terms:ETFIndex fundUCITSAccumulating or incomeShare classISIN

Key facts

Ticker
CUKX
ISIN
IE00B53HP851
Provider
iShares
Tracks
FTSE 100
Structure
ETF
An exchange-traded fund: bought and sold on the stock exchange through the day, like a share.
Income
Accumulating
Income is reinvested inside the fund, so it shows up as a rising price rather than cash paid to you.
Ongoing charge
0.07% a year · about £7 on £10,000
Fund size
£2.4bn
Launched
Domicile
Ireland
Can be held in
ISA and SIPP
Currency hedged
No
Price currency
Pounds (GBP)
Category
UK shares

Price chart

Closing price
£218.40+16.1% over 1 year · closing price
CUKX closing price: £188.12 on 05/10/2025, £218.40 on 30/09/2026 (+16.1%); low £186.82, high £223.95.

Over the last year, the closing price went from £188.12 on 05/10/2025 to £218.40 on 30/09/2026 (+16.1%). The lowest close shown was £186.82 on 12/10/2025 and the highest £223.95 on 07/08/2026.

Chart: closing prices we have recorded since 05/10/2025. Points up to mid-2026 have income reinvested; later ones are the price as traded, so the line is not measured the same way throughout.

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

Five years of prices, and after inflation

256 weekly closes, from 26/09/2021 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

What it holds

The ten largest holdings make up 49.4% of the fund, as of .

Top 10 holdings

Top holdings of CUKX: the ten largest, as a percentage of the whole fund, as of 29/09/2026
Rank#HoldingWeight as a percentage of the fund
1HSBCHSBA10.18%
2ShellSHEL8.25%
3AstraZenecaAZN7.32%
4Rolls-RoyceRR.4.88%
5UnileverULVR3.77%
6BPBP.3.39%
7British American Tobacco p.l.cBATS3.30%
8GSKGSK2.91%
9Rio TintoRIO2.88%
10Lloyds Banking GroupLLOY2.47%

Source: iShares, holdings as published, as of , company pages by TradingView

Where it invests

The portfolio by sector, country and type of asset, as a share of the whole fund. Bonds, cash and positions the source does not classify are shown as they come, not guessed.

By sector

  1. Financials28.0%
  2. Industrials13.7%
  3. Consumer Staples13.3%
  4. Health Care11.9%
  5. Energy11.9%
  6. Materials8.0%
  7. Utilities4.4%
  8. Consumer Discretionary4.1%
  9. Other sectors4.8%
As published by iShares, as of 29/09/2026.

By type of asset

  1. Equity99.3%
  2. Cash and money market0.7%
Added up from the holdings iShares publishes, as of 29/09/2026.

104 holdings are listed for this fund. All 104 holdings of CUKX, with the full split by sector, country and type of asset.

More of the portfolio

The fund publishes 104 holdings; the ten largest make up 49.4% of it. The fund's portfolio is also split by currency.

Create a free account to see the full holdings list and the currency, maturity and credit-quality breakdowns

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Holdings:Compare what it holds with another fundHoldings overlapHow overlap is measured

Funds tracking the same index

13 funds track FTSE 100, this one included and share classes counted once; their ongoing charges range from 0.07% to 0.30% a year (30/09/2026).

13 funds that track the FTSE 100, listed by name. Returns are the data vendor’s, in pounds, with income reinvested unless marked “price”.
Fund1 year5 years
HSBC FTSE 100 UCITS ETFDistributing · 0.08% a year+17.9%+80.0%
Invesco FTSE 100 UCITS ETFAccumulating · 0.09% a year+19.0%+81.1%
iShares Core FTSE 100 UCITS ETF GBP (Acc)This fundAccumulating · 0.07% a year+17.9%+79.9%
iShares Core FTSE 100 UCITS ETF GBP (Dist)Distributing · 0.07% a year+17.9%+80.0%
iShares Core FTSE 100 UCITS ETF Accum Hedged USDAccumulating · Currency hedged · 0.20% a year+19.0%+85.7%
Multi Units LU - Amundi FTSE 100Accumulating · 0.14% a year+18.0%+79.7%
Multi Units LU - Amundi FTSE 100Distributing · 0.14% a year+18.0%+79.7%
Multi Units LU - Amundi FTSE 100Accumulating · 0.30% a year+12.9%+62.3%
UBS (Lux) Fund Solutions - UBS FTSE 100 UCITS ETF -GBP dis- DistributionDistributing · 0.20% a year+17.8%+78.7%
Vanguard FTSE 100 UCITS ETFDistributing · 0.09% a year+17.9%+79.9%
Vanguard FTSE 100 UCITS ETF AccumGBPAccumulating · 0.09% a year+17.9%+79.9%
Xtrackers FTSE 100 Income UCITS ETFDistributing · 0.09% a year+17.9%+79.7%
Xtrackers FTSE 100 UCITS ETF (DR) Capitalisation 1CAccumulating · 0.09% a year+17.9%+79.7%

Source: TradingView reported returns and fund ongoing charges, as of

Read more:Index fundsTracking differenceHow funds are compared

Other versions of this fund

iShares’s other share classes and funds on the FTSE 100. They can differ in how income is paid, currency hedging and charge.

Read more:Share classesAccumulating or incomeCurrency hedging

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 220 rolling 12-month returns since July 2021, and of 116 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

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  • Rank among similar funds

    Rank by total return over 1, 3 and 5 years among up to 26 UK share funds, not currency-hedged, highest first.

    Pro

Pro — currently by invitation

Pro includes the rank among similar funds

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 ongoing charge of CUKX?

The ongoing charge of CUKX is 0.07% a year — about £7 a year on every £10,000 invested, taken from the fund’s value rather than billed to you. Platform and dealing fees are charged separately. Ongoing charge of iShares Core FTSE 100 UCITS ETF GBP (Acc) 0.07% a year, as of 01/10/2026: 24 of the 31 other UK share funds charge more, 1 the same and 6 less (share classes counted once).

What does CUKX track?

CUKX tracks the FTSE 100 — the 100 largest companies listed on the London Stock Exchange.

Is CUKX accumulating or distributing?

CUKX is accumulating: income is reinvested inside the fund, so it shows up as a rising price rather than cash paid to you.

What is the ISIN of CUKX?

The ISIN of CUKX is IE00B53HP851. An ISIN identifies one exact share class of a fund; CUKX is its ticker on the London Stock Exchange.

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

Calendar-year returns of CUKX in pounds (price, with income reinvested in the fund): 2022 +5.0%, 2023 +7.7%, 2024 +8.7%, 2025 +25.9%; 2026 to 30/09/2026 +9.9%. Past performance is not a guide to future returns.

How has CUKX done after inflation?

Over the five years to 30/09/2026 CUKX’s total return was +79.9%, or +40.6% after UK CPIH inflation. Past performance is not a guide to future returns.

Similar funds

More UK share funds, largest first. Size is a fact, not a verdict.
All UK share fundsEvery fund we cover

Sources and dates

Prices
London Stock Exchange closes via TradingView, at least 15 minutes delayed, latest
Returns
TradingView reported returns (net asset value with income reinvested where available)
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
Charges
The fund’s ongoing charges figure, via TradingView
Holdings
iShares, as published,
Identity
FCA Financial Instruments Reference Data System (FIRDS) and the issuer
Fund size
TradingView, converted to pounds at the latest ECB reference rate

Methodology:Data sourcesReturnsCategoriesAll methods

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