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SpaceX (Nasdaq: SPCX) and Rocket Lab (Nasdaq: RKLB) are both publicly traded space companies, but they sit at opposite ends of the risk-and-scale spectrum: a freshly listed ~$2 trillion giant versus an established, still-scaling small-cap with a transformational acquisition in progress. This is a financial comparison, not a technical one; see our vehicle-and-operations comparison for the launch-vehicle side of the story.
| Metric | SpaceX (SPCX) | Rocket Lab (RKLB) |
|---|---|---|
| Ticker / Exchange | SPCX · Nasdaq | RKLB · Nasdaq |
| Listed Since | June 12, 2026 (IPO) | August 2021 (SPAC merger) |
| IPO / Debut Pricing | $135/share, priced at ~$1.78T; debut-day market cap ~$2.1T: largest IPO in history | N/A (SPAC, Vector Acquisition Corp) |
| Market Cap (Aug 2026) | ~$1.92T | ~$46.2B |
| Most Recent Quarterly Revenue | ~$15.5B (FY2025 run-rate, incl. Starlink) | $234M (Q2 2026, +62% YoY) |
| Revenue Mix | ~60% Starlink, ~40% launch services | Launch + space systems, moving toward global satcom post-Iridium |
| Backlog | $30B+ | $2.36B across 90+ contracted missions |
| Public Float / Liquidity | Limited: recently listed, still building trading history and analyst coverage | Established: 4+ years of public trading history, broad institutional ownership |
| Primary Growth Vehicle | Starship: 13 suborbital test flights, then the first orbital flight (Flight 14, Sep 28, 2026, 26 Starlink V3 satellites deployed, per SpaceX) | Neutron: pad delivery targeted Q4 2026; first flight NET late 2026 (slipped from mid-2026) |
| Pending Corporate Action | None disclosed | Definitive agreement to acquire Iridium (IRDM) for ~$8B ($54/share cash-and-stock); expected to close mid-2027 |
| Profitability | Not disclosed publicly at per-segment level; overall business reported profitable pre-IPO | Approaching breakeven; Neutron development spend still pressures near-term margins |
| Key Bull Case | Starlink recurring revenue + Starship cost curve could make SpaceX the default heavy-lift and broadband provider for a generation | Neutron success + Iridium integration would transform RKLB from a launch company into a diversified space-systems and satcom operator |
| Key Bear Case | Priced for perfection at ~$2T; any Starship setback or Starlink competitive pressure (Kuiper) hits the thesis hard | Neutron has already slipped once; Iridium deal adds financing and integration risk ahead of a mid-2027 close |
Figures as of Sep 28, 2026 (auto-updated daily from company profiles).
SpaceX went public on Nasdaq on June 12, 2026, pricing at $135/share for a ~$1.78 trillion valuation and closing its debut day around ~$2.1 trillion: the largest IPO in history. It has held roughly that level since, making it the single largest space-industry equity by an enormous margin. Rocket Lab, by contrast, has traded publicly since its 2021 SPAC merger and sits around a $46.2B market cap as of August 2026, still a small-cap next to SpaceX, but up substantially on record quarterly revenue and the Iridium deal announcement.
That scale gap shapes everything else about the comparison. SpaceX is a mega-cap with a trading history measured in weeks; Rocket Lab is a small-cap with more than four years of quarterly reports, analyst coverage, and price history for investors to underwrite.
SpaceX's revenue run-rate is estimated above $15 billion annually, split roughly 60% Starlink subscription revenue and 40% launch services. That mix is what separates SpaceX from a pure launch company: Starlink is recurring, high-margin, and growing independent of launch cadence. The company also carries a launch and Starlink backlog north of $30 billion.
Rocket Lab posted record Q2 2026 revenue of $234 million, up 62% year-over-year, against a launch-and-space-systems backlog of $2.36 billion across more than 90 contracted missions. Growth is real and accelerating, but the company is still investing heavily in Neutron and is not yet consistently profitable: the opposite financial profile of SpaceX's reported pre-IPO profitability.
Starship's first 13 test flights were suborbital, including Flight 13 (July 24, 2026), which released 20 Starlink V3 satellites on a suborbital path where they reentered by design. On Flight 14, September 28, 2026, Starship reached orbit for the first time and deployed 26 Starlink V3 satellites into the constellation, SpaceX reported. If its launch cadence and reuse economics improve from here, that supports the bull case behind the ~$2T valuation. The risk is the flip side: any high-profile Starship setback, or faster-than-expected Kuiper/OneWeb competitive inroads against Starlink, would hit a stock priced for continued dominance.
Rocket Lab has two major catalysts running in parallel. Neutron (its medium-lift, partially reusable rocket) is targeting pad delivery in Q4 2026 with more than 400 Archimedes engine hot-fires completed, but first flight has already slipped from a mid-2026 target to no earlier than late 2026. Separately, Rocket Lab has a definitive agreement to acquire satellite operator Iridium Communications (Nasdaq: IRDM) for roughly $8 billion in cash and stock ($54/share), expected to close mid-2027. If both land, Rocket Lab becomes a fundamentally different company: launch provider, space-systems manufacturer, and global satcom operator in one. If either slips further or falls through, the stock likely gives back some of its 2026 re-rating.
SPCX and RKLB aren't really substitutes for each other. SpaceX is a mega-cap bet on the entire space economy consolidating around one vertically integrated operator, priced accordingly. Rocket Lab is a smaller, higher-beta bet on execution risk paying off twice over: Neutron reaching orbit and the Iridium acquisition closing on schedule. Investors weighing space-sector exposure should treat this as a barbell, not a coin flip: SPCX for scale and Starlink's recurring-revenue moat, RKLB for a more leveraged, binary-catalyst play on the next 12-18 months.
Track live SPCX and RKLB prices alongside every other public space stock
This page does not say, and nothing on SpaceNexus is investment advice. It lays out what each company earns, how each is valued and what each is betting on (SpaceX on Starlink and Starship, Rocket Lab on Neutron and its space-systems business), so you can bring an informed question to a licensed adviser.
Roughly two orders of magnitude by market value (about $2 trillion against roughly $12 billion) and more than twenty times by revenue. Rocket Lab is a real launch and satellite-components company; SpaceX is a telecom that also runs the world's launch market.
It has grown revenue quickly (about $436 million in 2024) while still investing heavily in Neutron; check its latest quarterly filing for the current profit picture. SpaceX reported a net loss in Q2 2026 on $7.8 billion of revenue because of Starship and constellation spending.
Neutron's first flight, targeted for late 2026: it is the company's entry into the medium-launch market Falcon 9 dominates. For SPCX the equivalent is Starship reaching routine reuse and Starlink's subscriber growth.