SpaceX vs. Rocket Lab: Which One Will Dominate the Next Decade?

SpaceX is reported to be filing for an IPO at a $2 trillion valuation, with 2025 revenue of $18.5 billion and EBITDA of $8 billion, while Rocket Lab posted $602 million in revenue, a $37 billion market cap, and negative EBITDA. The piece argues Rocket Lab may be the better relative buy because SpaceX already trades at roughly 108x sales versus Rocket Lab's 67x, even though SpaceX dominates on scale. The article is largely comparative commentary, but the IPO angle and valuation debate could influence sentiment in space-related stocks.

Analysis

The immediate market takeaway is not that one space company is “better,” but that the listing would likely re-rate the entire private-space complex. A public SpaceX at a triple-digit sales multiple creates a fresh comp for every adjacent asset, which is a mixed blessing: it validates the category, but also raises the bar for any company without either software-like margins or a clearly dominant launch cadence. That is especially relevant for capital-intensive names where valuation is still being justified by backlog rather than free cash flow.

The second-order winner is not necessarily the obvious direct competitor. If SpaceX goes public at that valuation, the scarcity premium shifts toward smaller “pure play” names with cleaner narratives, but only until investors force a profitability filter. That means suppliers with mission-critical exposure and limited customer concentration could outperform the headline competitors, while lower-quality adjacent space names may see their multiples compress once investors realize the market is paying up for a platform, not for launches per se.

The biggest risk is timing: the market may initially treat the IPO as proof that space is a secular winner, but the re-rating can reverse quickly if lockup expiries, secondary sales, or public-market scrutiny expose the difference between growth and durable unit economics. For Rocket Lab specifically, the catalyst window is measured in months, not days: any delay or cost overrun around next-gen launch capability would make its premium valuation much harder to defend versus a public SpaceX benchmark. Conversely, a clean execution cycle could let it trade on scarcity before the public market fully normalizes the comp.

Consensus is probably underestimating how much a successful IPO would change the cost of capital across the sector. The most important effect may be indirect: better-funded competitors can intensify pricing pressure in launch and satellite services, forcing weaker players to choose between margin and share. That creates a classic bifurcation trade—own the names with operating leverage and customer stickiness, avoid the “story stocks” that only work if the market keeps extrapolating growth without demanding cash generation.

Key Decisions for Investors

• Go long RKLB only as a tactical trade into the IPO window, but hedge with a tight stop if the market starts valuing it against SpaceX on a revenue multiple basis; upside is a short-term scarcity rerate, downside is multiple compression if execution slips.
• Avoid chasing any unprofitable small-cap space names for the next 1-2 quarters; use the SpaceX IPO as a filter event and short the weakest balance sheets if they gap higher on sympathy.
• Build a relative-value basket: long high-quality aerospace/space suppliers with recurring content and short second-tier launch/space infrastructure names; the trade works if the IPO pulls capital toward the ecosystem but forces a later profitability reset.
• If SpaceX prices successfully, consider selling upside calls or using put spreads on stretched pure-play space proxies over a 3-6 month horizon; the setup favors volatility normalization after the initial enthusiasm fades.
• Watch for a post-IPO bid in hardware, launch, and satellite service enablers; if the comps expand without corresponding cash flow improvement, fade the move rather than buy it.