Sector Watch: BA vs LMT vs RTX — Which Defense Giant Offers the Best Risk-Reward as Global Rearmament Accelerates
The United States and Israel launched joint military strikes on Iran on February 28, 2026 — an escalation that sent defense stocks surging and forced investors to reassess the sector's long-term trajectory. Boeing (BA), Lockheed Martin (LMT), and RTX Corporation (RTX) — the three largest U.S. defense contractors — each rallied on the news, but the question facing investors is no longer whether defense spending will grow, but which of these three giants offers the best combination of upside, profitability, and risk management in a world that is rapidly rearming. The macro backdrop is unambiguous. NATO allies are increasing defense spending to 2% or more of GDP, the UK just approved a £1 billion defense helicopter deal, and the geopolitical environment — from the Middle East to Eastern Europe to the Indo-Pacific — has never looked more favorable for defense contractors since the Cold War. All three stocks are trading near or at 52-week highs, with RTX leading the pack as the [largest by market cap at $272 billion](/article/sector-watch-why-defense-stocks-are-surging-geopolitical-catalysts-nato-spending-and-the-sectors-investors-are-watching). But these are very different businesses with very different risk profiles. Boeing is a turnaround story with a [negative tangible book value and massive debt](/article/ba-analysis-boeings-182-billion-turnaround-bet-why-the-aerospace-giant-still-loses-money-operationally-despite-90-billion-in-revenue). Lockheed Martin is a pure-play defense compounder [trading near its 52-week high of $669.75](/article/lmt-analysis-lockheed-martin-touches-a-52-week-high-as-global-rearmament-reshapes-the-defense-sector-is-the-rally-priced-in). RTX is a diversified powerhouse straddling both commercial aerospace and defense. Understanding these differences is critical before deploying capital into the sector.