Lockheed Martin vs. RTX: Which Defense Stock Is a Better Buy in 2026?

Lockheed Martin reported FY 2025 revenue of $75.1B and free cash flow of $6.9B, while RTX generated $88.6B of revenue and $7.94B of free cash flow. The article favors Lockheed on valuation, citing a 17x forward P/E and 1.6x P/S versus RTX at 26.7x and 2.8x, but flags Lockheed’s higher leverage and litigation risk and RTX’s supply chain, compliance, and powder metal issues. Overall, the piece is a valuation-driven comparison in a defense-heavy geopolitical backdrop, with modest investor relevance rather than a direct catalyst.

Analysis

The market is effectively choosing between two different defense exposures: LMT is a concentrated program asset with lower multiple risk, while RTX is a higher-quality industrial complex with more operational complexity. In the near term, RTX’s mix is better positioned for earnings resilience because commercial aftermarket and defense spending can offset each other, but that same mix also means more moving parts, more execution variance, and slower multiple expansion until engine-related issues are fully contained.

The second-order winner is likely the broader aerospace supply chain rather than either prime. If Pratt & Whitney’s inspection burden persists through 2026, it creates incremental demand for replacement parts, maintenance, and capacity at third-party MROs and select component suppliers, while also tightening engine availability for narrowbody fleets. That dynamic is mildly negative for airline utilization and OEM delivery schedules, but it can support pricing power across maintenance ecosystems.

LMT’s discount looks justified only if you believe its concentration risk is capped; otherwise the market is underpricing a regime shift where procurement timing, litigation, or program slippage becomes the dominant driver of sentiment for months at a time. The F-35 visibility is a structural advantage, but it also makes incremental upside harder to monetize because the durability of the cash stream is already well understood. By contrast, RTX has more room for operational beats, but the path to rerating likely requires several clean quarters rather than one headline quarter.

The contrarian view is that the cheaper stock may not be the better value if multiple compression reflects lower optionality, not mispricing. In a world where geopolitical budgets remain supportive for years, the better trade may be to own the company with the more credible compounding engine and hedge the execution tail with a smaller short in the less transparent operator. The key question is not who wins the next quarter, but which balance sheet and operating structure can absorb a multi-year defense upcycle without recurring surprises.

Key Decisions for Investors

• Long LMT / short RTX in a 1:1 pair for 6-12 months: express preference for simpler cash-flow visibility and lower execution noise; downside is capped if RTX resolves engine issues faster than expected and rerates on one or two clean quarters.
• If entering RTX, use staged accumulation over 2-3 months rather than a full position now: risk/reward improves only after the market confirms that inspection costs and supply-chain friction are peaking, not just stabilizing.
• Buy upside in LMT via 9-12 month call spreads instead of stock: the name screens cheap, but the cleanest catalyst is a defense-budget or geopolitical upside shock; defined-risk structures avoid paying for a low-beta carry trade.
• Pair long RTX with a short basket of airlines or narrowbody-exposed lessors for a 6-18 month horizon: engine constraints can tighten fleet availability and support aftermarket economics while pressuring operators.
• Avoid chasing the industrial-defense ETF trade outright; prefer single-name exposure. The spread between LMT and RTX is a stock-selection market, not a sector beta market, so mispricing should be captured idiosyncratically.