Is NGG a Buy or a Sell? The Bull and Bear Case (2026)

That depends on which case you find more convincing, and both are on this page. The bull case rests on RIIO-T3 and the UK transmission build, with revenue (fy to mar 2026) at ~£17.7 billion (~$23.6 billion). The bear case rests on regulation is the core risk. Analysts covering it are spread from $71.00 to $98.00, which is itself a signal that this is genuinely contested. If you believe the thesis, the real questions become sizing and overlap rather than timing. Walnut is not an investment adviser and this is not a recommendation.

Nobody can answer that for you, and the honest version of the question is narrower: has anything changed in the reason you bought it? The bear case on this page is the place to check. Regulation is the core risk. If that risk is what you were worried about and it is now playing out, that is a real signal. If the price simply fell while the thesis held, that is a different situation entirely. The most pessimistic published target is $71.00, -13.2% from the $81.77 price, which is one analyst's downside case rather than a floor. Walnut is not an investment adviser.

RIIO-T3 and the UK transmission build. The single largest driver is UK Electricity Transmission, where Ofgem's RIIO-T3 price control began in April 2026 and runs for five years. The most optimistic analyst target on NGG is $98.00, +19.8% from the $81.77 price. That figure is only reachable if this thesis works close to its best case.

Regulation is the core risk. Ofgem and US state commissions set allowed returns, and political pressure on household bills in both the UK and New York can squeeze outcomes, as the March 2026 FERC order cutting New England transmission returns showed. Pending decisions on Massachusetts Gas and the downstate New York gas utilities could disappoint. Funding is the second risk: net debt was ~£44.2 billion and FFO to net debt slipped to 13.0%, with regulatory gearing guided to rise from 61% toward the high 60s by 2030/31. The 2024 rights issue raised ~£7 billion and diluted holders, and the scrip dividend keeps adding shares. Higher interest rates raise financing costs and lower the value placed on long-dated utility cash flows. Delivery risk is real on a £70 billion program that depends on supply chains, planning consent and skilled labor. Operational incidents also matter: the March 2025 fire at a substation that shut Heathrow drew scrutiny, and US law firms have announced investor investigations, though no filed class action was found. Storms add costs. For US holders, sterling moves change the dollar value of earnings and dividends, and UK dividends are paid in pounds and converted. The most pessimistic published target is $71.00, -13.2% from the current price, which is roughly what the stock is worth if these risks bite rather than the drivers.

National Grid plc owns and operates regulated electricity and gas networks in the UK and the US Northeast.

Decide that in advance, because it is far harder to think clearly once a position is moving against you. The concrete tripwires here: the driver behind the bull case (RIIO-T3 and the UK transmission build) stalling in the reported numbers rather than in the narrative, the risk above (regulation is the core risk) turning from a possibility into a reported fact, or the position growing large enough that a bad outcome would matter to your whole portfolio regardless of who is right.

NGG is the New York Stock Exchange ticker for American Depositary Receipts of National Grid plc, a FTSE 100 company headquartered in London. One NGG ADR represents five ordinary shares that trade in London under the symbol NG. National Grid owns regulated energy networks: electricity transmission in England and Wales, electricity distribution in the Midlands, South West England and South Wales, and electric and gas utilities in upstate New York, New York City and Long Island, and Massachusetts. It earns money mainly from tariffs set by regulators, which allow it to recover costs and earn a return on the assets it builds. That makes revenue more predictable than at most companies, but also ties profit growth closely to how much it invests and what regulators allow it to earn on that investment.

Each NGG ADR represents five National Grid ordinary shares, held by a US depositary bank on behalf of ADR holders. The ADR price therefore tracks roughly five times the London share price converted into dollars. In late October 2026 the London shares traded near 1,222p and sterling was around $1.33, which works out to about $81.60, close to the ~$82 NGG price. Because of this link, NGG moves with both the underlying share price and the pound against the dollar. ADR holders receive dividends in dollars after conversion, and depositary banks can charge small per-ADR fees, typically deducted from dividends. Voting and other shareholder rights pass through the depositary rather than directly.

In results for the year to 31 March 2026, released 14 May 2026, National Grid reported underlying operating profit of ~£5.68 billion and underlying EPS of 78.0p, up 8% at constant currency, with statutory EPS of 65.5p. Record capital investment of ~£11.6 billion drove asset growth of 10.9%. Profit growth came from UK Electricity Transmission (up 18%) and New York (up 25%), partly offset by divestments, storm costs, a larger share count and a FERC order cutting New England transmission returns. In an October 2026 trading update, management said it expects 2026/27 underlying EPS growth to land slightly above its 13-15% guidance range. Half-year results are scheduled for 5 November 2026.