The receipt is the revenue line. In its annual report filed February 26, 2026, Rocket Lab reported full-year 2025 revenue of $601.8 million — up from $436.2 million in 2024, $244.6 million in 2023, $211.0 million in 2022 and $62.2 million in 2021. That is roughly a tenfold expansion in four years, a curve that few hardware companies of any vintage can show. The figures come straight from the company's FY2025 Form 10-K, the canonical record, surfaced via SEC filings's SEC filing index. The 2025 step alone added $165.6 million, a 38% year-over-year increase — more than double the company's entire 2021 revenue, added in a single year.

The instinct is to read this as a launch story. It mostly is not. Rocket Lab's revenue ramp has been carried by its Space Systems segment — satellite components, spacecraft and bundled products-and-services work — not by the Electron launch cadence that gets the headlines. The 10-K's 2025 revenue bridge makes the split explicit: Space Systems revenue was $402.8 million, up $91.9 million (30%), "primarily due to spacecraft manufacturing growth," while Launch Services revenue was $199.0 million, up $73.7 million (59%). Space Systems is now roughly two-thirds of total revenue. When a launch company's largest and core line is spacecraft and components, the equity story is quietly becoming a systems story.

The launch line is not standing still, though — 2025 was its strongest year yet. The filing reports 21 Electron launch missions completed in 2025 versus 16 in 2024, and credits the 59% launch-revenue gain to that higher cadence plus "higher revenue per launch" and over-time recognition on Electron missions. So the right framing is not "launch is dead, systems is everything" but "both grew, and systems grew off a larger base." The $7.9 million net downward cumulative catch-up adjustment the filing discloses on Space Systems — tied to higher estimated costs to complete an individual contract — is the reminder that percentage-of-completion accounting on spacecraft programs can move the line in either direction.

That distinction matters for how you value the next quarter. Launch revenue is lumpy and mission-timed; recognized systems revenue tracks production and program milestones, which smooth the line and lift the recognized base. The interim trend confirms it: Q1 2026 revenue was $200.3 million, up from $122.6 million in the same quarter of 2025, per the Q1 2026 Form 10-Q. A single quarter now does what an entire early year used to — Q1 2026 alone exceeded Rocket Lab's entire 2022 revenue.

Profitability moved with the mix. Gross profit reached $207.2 million in 2025, a 34.4% gross margin, up sharply from 26.6% in 2024 and 21.0% in 2023 — three straight years of expansion as scale and a richer systems mix lifted the margin. That is the leverage story underneath the revenue ramp: cost of revenues grew 23% while revenue grew 38%. The bottom line, however, stayed red: the 10-K reports a 2025 net loss of $198.2 million, roughly flat with $190.2 million in 2024, because research-and-development spend — $270.7 million, 45% of revenue — is funding the next vehicle rather than dropping to the bottom line. The gross-margin trend says the existing business is scaling; the net loss says management is reinvesting all of it and more.

The forward order book backs the ramp. Backlog grew from $1,067.0 million at the end of 2024 to $1,847.3 million at the end of 2025 — a 73% increase, with approximately 37% expected to convert to revenue within twelve months. A backlog nearly equal to three years of current revenue, growing faster than revenue itself, is the clearest evidence the ramp is contracted rather than speculative. As of December 31, 2025 the company also reported flight hardware on over 1,800 missions and more than 200 spacecraft deployed for customers — the installed base that feeds the recurring components and services work.

The customer base under that backlog is heavily institutional, which is part of why it is contracted years out. The 10-K notes that since its first launch in 2017 the company has delivered over 200 spacecraft across 75 successful missions for commercial and government customers, naming the U.S. Department of War, NASA, DARPA, and the National Reconnaissance Office among them. Those are multi-year, milestone-paying programs rather than spot purchases, which is exactly why a $1.85 billion backlog can sit on a $602 million revenue base — the systems business books long-dated government and constellation work that recognizes over time. The August 2025 acquisition of GEOST, a payload and optical-systems supplier, extended that vertical integration further up the spacecraft stack, consistent with a strategy of owning more of the satellite rather than just launching it.

The discipline this desk insists on: a revenue ramp is recognized revenue, not bookings, and not the Neutron narrative. None of these figures price the still-pre-revenue Neutron launch vehicle, the larger rocket absorbing much of that $270.7 million R&D line; they price the business Rocket Lab already runs. The cadence question is real, but the filing says the systems business — backed by a $1.85 billion backlog and an expanding gross margin — is what got RKLB from $62 million to $602 million. That is the line to watch when the next 10-Q lands — recognized systems revenue, gross margin, and backlog conversion, with the Neutron program treated as the optionality it is rather than revenue it is not. Filing data via SEC filings.