National Grid stock holds at GBP 11.48 as market value reaches GBP 57.7 billion

National Grid plc (GB00BDR05C01) closed at GBP 11.48 on the London Stock Exchange on September 21, 2026, unchanged on the session. The utility's market capitalization stood at GBP 57.7 billion, giving investors a current valuation anchor as of the latest completed trading day.

Stock trades in a defined range

The September 21 session recorded a high of GBP 11.51 and a low of GBP 11.40, while volume reached 6,632,119 shares. The five-day comparison was GBP 11.48 versus GBP 11.575 on September 17, 2026, a decline of GBP 0.095, or 0.82 percent.

The longer comparison is more constructive: the stock stood at GBP 10.385 on September 22, 2025, so the September 21, 2026 close was GBP 1.095 higher, equivalent to a 10.54 percent increase over the one-year period shown in the market data.

Valuation remains the central figure

National Grid's market value of GBP 57.7 billion on September 21, 2026 puts the current share price alongside a one-year reference range that reached GBP 14.29 on September 22, 2025 and GBP 10.385 on the same date. The gap between those two reference points is GBP 3.905, or 37.60 percent of the lower figure.

That range gives the price a more useful frame than the unchanged daily move alone. At GBP 11.48, the stock was GBP 2.81 below the cited high and GBP 1.095 above the cited low, while the latest session's 6.63 million shares traded provided a measurable liquidity signal.

National Grid stock stays measurable

National Grid stock ended at GBP 11.48 on the London Stock Exchange on September 21, 2026. The unchanged daily result, GBP 57.7 billion market capitalization and 10.54 percent year-over-year price increase form the clearest dated snapshot for the company.

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