Rocket Lab Pushes Neutron Rocket's Debut Launch From 2026 to 2027

Rocket Lab Corporation announced on October 14, 2026, that it is adjusting the development schedule for Neutron, its next reusable medium-lift rocket, moving the inaugural launch target from the fourth quarter of 2026 to sometime in 2027, according to a company statement reported by Yahoo Finance and an investor-relations presentation and video update posted the same day.

What caused the delay

According to a report by Securities.io, the schedule change traces to the first stage's forward propellant tank dome, a large carbon-composite structure. Inspections found voids — tiny air pockets between layers of carbon fiber — in a newly cured version of the dome.

The report said the voids originated from design changes made after an earlier version of the tank had already been qualified. Those changes increased the thickness of the carbon composite in certain areas, creating conditions that allowed voids to form during the curing process. Rocket Lab said it had reproduced the defect in testing and was adding manufacturing-process changes to prevent it from recurring.

Beck also described Neutron's propellant dome as part of what he called the largest pressurized structure ever made from carbon composite, according to Securities.io, and said Rocket Lab had developed custom out-of-autoclave curing processes because industrial autoclaves large enough for the component do not exist.

Securities.io reported that three steps remain before the dome is ready: building a new forward dome, curing and testing it, and then assembling the stage for hydrostatic and cryogenic test campaigns. The company said it expects that work to be completed within the first quarter of 2027, which would place the actual debut launch later in the year.

How investors reacted

Rocket Lab's stock fell after the announcement. Yahoo Finance reported shares dropped 7.85% to $59.18, while Investing.com put the decline at 7.80% on the same day.

The reaction followed a broader pullback in the stock. A report by The Motley Fool, published two days before the delay announcement, said Rocket Lab shares were trading roughly 55% below the record of about $150 the stock reached in late May 2026.

The Motley Fool report also linked part of the decline to the company's cash position, citing second-quarter free cash flow of negative $110 million, compared with negative $55 million a year earlier, and dilution from equity sales — $1.94 billion raised by mid-September 2026 through the sale of 29.3 million shares.

Despite the stock's drop from its peak, The Motley Fool reported that Cathie Wood's ARK Invest continued buying Rocket Lab shares, acquiring roughly 1.3 million shares across three transactions between August 31 and October 1, 2026 — worth more than $85 million at the time of purchase — bringing ARK's three funds to a combined holding of about 3.2 million shares, valued at roughly $220 million.

Neutron's customer manifest

Even before the October 14 update, The Motley Fool reported that Rocket Lab's own management had acknowledged the window for a Neutron launch before the end of 2026 was shrinking. The same report said Neutron's first confirmed customer mission, for Kepler Communications, was not scheduled until 2028, and that the company described its broader launch manifest as approaching full capacity through the end of the decade.

What is Neutron

Neutron is Rocket Lab's in-development reusable medium-lift launch vehicle, intended to carry larger payloads than the company's existing Electron rocket and to compete for national-security and commercial satellite-constellation launch contracts. Rocket Lab currently flies the smaller Electron and the suborbital HASTE vehicle for commercial, government and defense customers, according to Investing.com.

Neither Investing.com nor Yahoo Finance reported additional financial guidance tied specifically to the delay, and Rocket Lab's own statement, as summarized by Yahoo Finance, did not include a specific reason for the schedule change, with fuller detail provided instead through the investor presentation and video referenced by Securities.io.