Picture supply: Rolls-Royce plc
Rolls-Royce (LSE:RR.) shares have risen greater than 1,000% over the past 5 years. Up nearly 87% to date in 2025, too, the FTSE 100 agency’s spectacular bull run is displaying no indicators of slowing.
I can’t assist however really feel, although, that Rolls shares at the moment are trying unreasonably costly. At £10.98 per share, the engine builder trades on a ahead price-to-earnings (P/E) ratio of 38.2 instances.
At these ranges, there’s an opportunity the corporate’s shares might wrestle to rise additional. Moreover, a chunky valuation like this may occasionally immediate a pointy worth correction if the broader inventory market falls or information move begins to underwhelm.
Might Rolls’ share worth now be the FTSE‘s most overpriced share? And the place might the inventory be heading subsequent?
Excellent news
Make no mistake: Rolls’ restoration from the depths of the pandemic is nothing in need of unimaginable.
Because the airline business has recovered, large-engine flying hours have surged, boosting demand for the corporate’s high-margin aftermarket companies, resembling upkeep and spare components. This types the spine of Rolls’ operations.
However that is solely a part of the story. Its shares have risen as traders have wholeheartedly purchased into chief govt Tufan Erginbilgiç’s transformation technique.
Contract negotiations, cost-cutting, and effectivity measures all go away Rolls a extra environment friendly, leaner machine than earlier than the pandemic. It’s anticipating underlying working revenue of £3.1bn to £3.2bn this yr — up from £2.5bn in 2024. Free money move is anticipated to leap from £2.4bn final yr, to between £3bn and £3.1bn in 2025.
There are good causes to count on the enterprise to fulfill these targets and report additional progress subsequent yr. The worldwide journey business stays largely resilient, whereas the outlook for the defence sector continues to enhance. Rolls can be making progress with its small modular reactors (SMRs).
Hazard zone?
Buyers have grown accustomed to fixed excellent news from Rolls. And my concern is that this might create an issue afterward. Any disappointment might puncture that sense of invincibility across the firm, and set off a pointy pullback within the shares.
And be in little doubt that the corporate faces extreme challenges that would derail market condifence.
In November’s newest replace, Rolls flagged up the “continued provide chain challenges” that would drive costs up, injury its aftermarket companies unit, and hamper mission supply.
This isn’t all. It faces extreme competitors throughout every of its markets, and future contracts are certainly not assured. Extra instantly, it might see revenues progress sluggish to a crawl if the worldwide financial system weakens, hitting the airline sector and demand for its engine companies.
Right here’s what I’m doing
At at present’s ranges, the corporate’s ahead P/E ratio is greater than 3 times the broader FTSE 100 common.
I wouldn’t say that Rolls-Royce’s share worth is the Footsie’s most overvalued enterprise at present. There are many high-priced firms with far poorer funding potential at present.
It might effectively proceed to rise in worth. However at at present’s costs, I’m not tempted to purchase the engine builder for my portfolio.

