“Boom” is a strong word in financial markets, but the FTSE 100’s trajectory in 2026 has come close to earning it. London’s Blue-Chip benchmark broke 10,000 points for the first time at the start of 2026, according to Yahoo Finance and Morningstar UK. Trading Economics data shows the index trading around 10,297 on 13 May 2026, with subsequent sessions pushing higher. Forecast Ordinary Dividends could reach £88bn (AJ Bell). That is a market that, by recent standards, looks unusually energetic.

The question is which FTSE 100 shares investors should be watching most closely. This article highlights five names dominating UK investor conversations — chosen to span income, growth and re-rating themes — alongside the wider context of London’s 2026 surge.

Key takeaways

  • FTSE 100 hit 10,000 for first time in 2026; trading around 10,300 in mid-May 2026 (Yahoo Finance, Trading Economics).
  • Five FTSE 100 shares on UK investor radar: HSBC, Shell, AstraZeneca, Rolls-Royce, Legal & General.
  • Miners (Antofagasta, Anglo American, Rio Tinto, Glencore) have been top recent risers per Hargreaves Lansdown daily data.
  • FTSE 100 forecast £88bn ordinary dividends in 2026, with HSBC alone at around £10.7bn (AJ Bell).
  • Risks include Commodity Volatility, sterling moves, political shifts and concentration.

Stocks mentioned in this article

HSBC (HSBA), Shell (SHEL), AstraZeneca (AZN), Rolls-Royce (RR.), Legal & General (LGEN), BP (BP.), GSK (GSK), Unilever (ULVR), Diageo (DGE), Rio Tinto (RIO), Glencore (GLEN), Anglo American (AAL), Antofagasta (ANTO), Barclays (BARC), Lloyds (LLOY), NatWest (NWG), Standard Chartered (STAN), BAE Systems (BA.), Tesco (TSCO), Sainsbury’s (SBRY), RELX (REL), LSEG, National Grid (NG.), Aviva (AV.).

Is the UK stock market really in a boom?

A boom needs more than a rally. It usually involves strong fundamentals, robust Capital flows and improving sentiment. The FTSE 100 in 2026 has elements of all three: record ordinary Dividend forecasts (£88bn per AJ Bell), a 3.4% forward Yield, a rerating from previously discounted multiples, fresh interest from global investors and rising momentum in defence, Mining and selected industrials.

But UK equities are not without macro caveats. The Office for National Statistics has reported modest growth, while Bank of England rate decisions and UK political volatility — including news flow around Prime Minister Keir Starmer’s Leadership in mid-May 2026 — have at times unsettled markets.

So is it a boom? Many investors are using the word cautiously. The data is supportive, but the rally has been driven by several themes rather than one dominant force, which makes it both broader and more vulnerable to individual shocks.

Five FTSE 100 shares on the radar

1. HSBC (HSBA)

HSBC is the FTSE 100’s largest forecast dividend payer in 2026, with around £10.7bn projected (AJ Bell). Strong Asian exposure, continued Buybacks and resilient capital ratios have underpinned the bank’s rerating. Recent Yahoo Finance coverage noted the share gaining more than 1% in a mid-May session as banks rebounded.

Risks: Credit cycles, sterling-dollar moves and any tightening of regulatory regimes in Hong Kong or the UK.

2. Shell (SHEL)

Shell is forecast to pay around £6.3bn in dividends in 2026 (AJ Bell), second only to HSBC, with continued quarterly distributions. The group’s integrated gas and Upstream divisions remain core income engines. Commodity volatility is the main risk.

3. AstraZeneca (AZN)

AstraZeneca is one of the FTSE 100’s largest companies by market cap and continues to invest heavily across oncology, cardiovascular and rare diseases, per its latest Annual Report. The group has been a meaningful driver of FTSE 100 Earnings growth, with healthcare offering defensive characteristics in volatile markets.

Risks: pipeline disappointments, drug pricing reforms and Patent expiries.

4. Rolls-Royce (RR.)

Rolls-Royce Holdings has been one of the FTSE 100’s most prominent re-ratings. Management has flagged improving free Cash Flow across civil aerospace, defence and power systems in its updates. The share has rerated significantly from Pandemic lows, which is itself a risk if results disappoint.

5. Legal & General (LGEN)

Legal & General’s forward yield has been quoted around 9% (indieinvestor.co.uk), among the highest in the FTSE 100. The group recently completed the $2.3bn sale of its US protection Business to Meiji Yasuda. The company remains focused on UK retirement, pension risk transfer and asset management.

Risks: longevity assumptions, capital market volatility and dividend sustainability.

Beyond the headline five

A full radar list should arguably include BAE Systems for defence exposure, RELX and LSEG for data and analytics, and Antofagasta or Rio Tinto for commodity-driven upside. Tesco and Unilever offer defensive consumer staples; Aviva and National Grid add additional income.

What this means for UK investors

The FTSE 100 in 2026 offers a relatively rare combination: meaningful yield, sector breadth and pockets of structural growth. UK investors using Stocks and Shares ISAs or SIPPs can hold blue chips with favourable tax treatment within HMRC allowances. Tax rules can change.

For investors building a UK-focused portfolio, blending a handful of FTSE 100 shares with a broad tracker is a common approach to balance concentration risk. Individual circumstances and goals should drive any decision.

Risks to watch

  • Commodity cycle: Miners and energy stocks remain cyclical.
  • Political and fiscal risk: UK politics has dominated headlines in 2026.
  • Sterling moves: A stronger pound could weigh on overseas earnings translation.
  • Concentration: A few sectors drive much of the index’s performance.
  • Rerating risk: Names like Rolls-Royce could give back gains if results disappoint.
  • Dividend cuts: Forecast distributions are not guaranteed.