US IPO market raised nearly twice the Q1 2025 total in Q1 2026 but deal count halved in April as Iran conflict and oil shock disrupt issuance pipeline
The US IPO (initial public offering) market raised close to double the capital in Q1 2026 compared with the same quarter in 2025, driven by a concentration of large-cap listings. However, deal count in the second half of the quarter fell sharply — dropping from 41 to 20 completed IPOs — as the Iran conflict and the effective closure of the Strait of Hormuz to oil shipping drove an energy price shock that injected severe uncertainty into equity market pricing. Highly anticipated debuts from OpenAI and SpaceX remain in preparation but have not yet launched, with the darkening macro backdrop adding complexity to timing decisions. A rising oil price environment compresses equity multiples for growth stocks, raises the discount rate used in IPO pricing models (the WACC, or weighted average cost of capital), and increases pricing risk for underwriters — all of which create structural pressure to delay or restructure listings. For the London market, the dynamic is directly relevant: the London Stock Exchange (LSE) has been competing aggressively for international listings, and any protracted freeze in US issuance typically redirects some deal flow to alternative venues. The FCA's ongoing reforms to UK listing rules — which eliminated the dual-class share restrictions that deterred several tech listings — are designed precisely to capture this kind of rerouted pipeline. UK and European ECM (equity capital markets — the practice group handling share issuances) teams will be monitoring closely whether the US pause creates an opening.
Why this matters
The collapse in US IPO deal count, even as aggregate capital raised remains elevated, signals a market driven by a small number of mega-listings masking underlying pipeline weakness. For UK ECM practices, the strategic opportunity is real: the FCA's 2024 listing rule reforms removed the premium/standard segment distinction and relaxed dual-class share rules specifically to attract tech and growth company listings to London. The Iran conflict's oil shock — which drives up energy costs, compresses discretionary spending, and increases WACC assumptions — is the proximate 'why now' trigger suppressing deal activity. Underwriting banks and their legal advisers face heightened liability exposure when pricing windows close rapidly after a prospectus is filed, making MAC (material adverse change) clause negotiation and force majeure analysis in underwriting agreements acutely live issues. Firms with strong ECM and structured finance practices in London will see advisory demand from issuers re-evaluating venue and timing.
On the Ground
A trainee on a postponed IPO would assist with verification notes — the process of checking every material statement in the prospectus against primary source documents — and would track and update the pricing supplement as market conditions shift. Coordinating updated comfort letters from reporting accountants ahead of any relaunched filing would also fall within a trainee's scope.
Interview prep
Soundbite
A hollowed-out US IPO pipeline creates a direct window for London's reformed listing rules to win mandates.
Question you might get
“How does a sharp rise in oil prices affect the pricing mechanics of a tech company IPO, and what does that mean for an underwriter's legal obligations under the prospectus regime?”
Full answer
The US IPO market raised nearly twice Q1 2025 capital in Q1 2026 but deal count halved as the Iran conflict's oil shock closed the pricing window for most issuers. OpenAI and SpaceX, the two most anticipated debuts, remain unlaunched. This matters for City ECM teams because the FCA's 2024 listing reforms, stripping dual-class share restrictions, were designed precisely to capture pipeline displaced from a volatile US market. The wider picture is that the Iran conflict has functionally repriced the risk environment for growth equity globally — oil-driven inflation erodes the discount rate assumptions on which growth stock valuations depend. My view is that London will see opportunistic mandates from issuers that can credibly market a UK listing as geopolitically insulated, particularly in the defence and energy transition sectors.
My notes
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