What Prologis offered, and why Segro said no
Prologis proposed an all-share combination that would value Segro at 925p per share, according to a London Stock Exchange regulatory notice published on 24 June. That represents a premium of roughly 25 per cent to Segro's closing price of 742p on the previous trading day.
Under the terms, Segro shareholders would own approximately 10.5 per cent of the enlarged entity. Prologis, which commands a market capitalisation of around $100bn, argued the merger would "unlock embedded opportunities for investment" that Segro would be "unable to unlock standalone due to structural constraints, including its balance sheet capacity and trading discount", according to its public statement.
Segro's board rejected the proposal "unequivocally" on 23 June, according to the same filing. The company has not published a detailed rebuttal, but the speed and tone of the rejection suggest the board regards the offer as materially below intrinsic value.
The gap between market price and underlying asset worth is central to the dispute. Segro manages £22bn in total assets, according to its most recent disclosures. At 742p, the shares traded at a significant discount to the company's reported net asset value. Prologis's 925p bid narrows that discount but does not close it, implying the American group was seeking to acquire the portfolio at less than the board's own assessment of what the properties are worth.
For context, Segro's full-year results for the last calendar year showed an 8.3 per cent rise in profit to £509m, as reported by City AM. The business has been growing rental income steadily, supported by tight vacancy rates across its UK and European logistics parks.
The data-centre land bank behind the premium
Behind the headline numbers sits an asset that neither the share price nor the bid fully captures: Segro's growing portfolio of land earmarked for data-centre development, much of it in urban locations where planning consent and power connections are scarce.
David Sleath, Segro's chief executive, told City AM in February that the rollout of data centres in UK urban hubs was "critical" for developments including AI-guided surgery. That comment underscores the board's view that the land bank's optionality, the right to develop high-value facilities on sites currently used for lower-intensity logistics, is worth considerably more than the market currently implies.
Data-centre demand across Europe has surged as hyperscale cloud operators and AI infrastructure builders compete for powered, connected sites. Logistics landlords that already control suitable plots in metropolitan areas hold a structural advantage: they can repurpose existing industrial land without navigating greenfield planning battles.
Prologis itself is active in data-centre development globally, which makes Segro's portfolio doubly attractive. Acquiring the UK group would hand Prologis a ready-made pipeline of urban sites in London, the South East, and key European cities. The board's rejection signals a belief that Segro can capture that value independently, without ceding control to a foreign parent whose capital-allocation priorities may differ.
Implications for tenants and operators
For the businesses that lease warehouse, logistics, or data-centre space from Segro, the identity of the landlord matters. A change of ownership could alter development timelines, rental strategies, and capital-expenditure priorities. Operators planning expansions on Segro-managed parks will be watching the next four weeks closely. An independent Segro is likely to continue its current pipeline; a Prologis-owned Segro might accelerate data-centre conversion at the expense of traditional logistics lettings, or vice versa.
London's valuation discount and the foreign bid wave
Segro is not an isolated case. The approach follows a wave of foreign bids for London-listed companies that has prompted alarm among City figures and policymakers.
Tate & Lyle was acquired by US rival Ingredion for £2.7bn. Blue-chip insurer Beazley and wealth manager Schroders were also taken off the market following overseas-led takeovers. The combined value of firms targeted or lost from the London Stock Exchange has reached an estimated £43bn, according to City AM reporting.
The pattern is consistent: overseas acquirers identify UK-listed businesses trading below the valuations their assets would command on other exchanges, then offer a premium that looks generous relative to the depressed share price but modest relative to net asset value. Boards face the uncomfortable choice of accepting a bid that crystallises a discount or rejecting it and hoping the market eventually corrects.
Segro's rejection is notable precisely because the board chose the second path. In doing so, it is implicitly arguing that the London discount is temporary, or at least that the company's own development programme will generate more value than the Prologis offer. Whether shareholders agree may depend on how long the discount persists.
European REIT peers trading on tighter discounts to NAV, or even premiums, offer a benchmark. If Segro's shares continue to languish well below book value while continental equivalents trade closer to par, pressure on the board to engage with Prologis, or another bidder, will intensify.
What happens next: the Takeover Code timetable
Under the UK Takeover Code, Prologis's decision to go public with its rejected proposal triggers a formal clock. The American group now has until 5pm on 22 July to either announce a firm intention to make an offer or withdraw, according to the regulatory filing. If it withdraws, it is barred from making another approach for at least six months.
Prologis chose to publicise the bid rather than walk away quietly, a tactic designed to bring Segro's shareholders into the conversation. By making the terms public, Prologis is inviting institutional holders to pressure the board into negotiations. The 10.5 per cent stake that Segro shareholders would hold in the combined group raises governance questions for UK institutions: many would find themselves holding a small minority position in a US-listed vehicle, with limited influence over strategy and reduced index weighting in UK benchmarks.
That index issue is not trivial. Segro is a constituent of the FTSE 100. Its removal would force tracker funds and index-linked pension portfolios to sell, potentially redirecting capital away from UK real-asset exposure. For institutional holders already concerned about the shrinking London market, this is an unwelcome consideration.
The next four weeks will determine whether Prologis raises its offer, whether Segro's board entertains a higher price, or whether the American group retreats. In the meantime, Segro's share price will serve as a real-time referendum on whether the market believes the board's defence, or the bidder's arithmetic.
