RTX Corporation is the product of one of the most consequential mergers in the history of the global aerospace and defense industry. The modern conglomerate was formed in 2020 when Raytheon Company (a pure-play defense contractor famous for its missiles and radar systems) merged with United Technologies Corporation (UTC). Prior to the merger, UTC executed a significant corporate simplification, spinning off its commercial businesses, Otis (elevators) and Carrier (HVAC systems), into independent companies, leaving only its aerospace divisions: Pratt & Whitney (jet engines) and Collins Aerospace (avionics and flight systems). The combination of Raytheon and the remains of UTC created a vertically integrated aerospace leader, recently rebranded simply as RTX.
The Commercial Aerospace Moat
RTX's commercial division is defined by the severe, capital-intensive economics of building jet engines. Pratt & Whitney, alongside GE Aerospace and Rolls-Royce, operates in a global oligopoly. Developing a new commercial jet engine (like the Geared Turbofan, or GTF) requires billions of dollars in R&D and over a decade of testing. New engines are often sold at low or negative margins. The company only achieves profitability years later by selling lucrative, multi-decade aftermarket maintenance and spare parts contracts. Meanwhile, Collins Aerospace provides the critical, less glamorous "guts" of the airplane, everything from the landing gear and oxygen systems to the advanced cockpit avionics, making RTX an indispensable supplier to both Boeing and Airbus.
The Defense and Missile Dominance
The Raytheon side of RTX operates in a different economic reality. As a prime contractor for the US Department of Defense and its allies, Raytheon does not take the upfront capital risks of the commercial aviation market. Defense contracts mix cost-plus and fixed-price structures, though the process is bureaucratic and subject to the whims of Congressional budgeting. Raytheon's core dominance lies in precision weapons and missile defense. The company manufactures the ubiquitous Tomahawk cruise missile, the Javelin anti-tank missile (in a joint venture with Lockheed Martin), and the Patriot air defense system. As geopolitical tensions rise globally, demand for these advanced, combat-proven systems provides RTX with a stable, visible revenue backlog.
The Synergy and the Hedge
The strategic logic behind the 2020 megamerger was the creation of an extensive corporate hedge. The commercial aviation industry is cyclical (as devastatingly proven by the COVID-19 pandemic, which grounded global fleets and decimated new aircraft orders). The defense industry, however, is generally counter-cyclical or insulated from commercial economic downturns. By combining the two under the RTX umbrella, management created a diversified conglomerate where the steady, government-funded cash flow of the defense division can subsidize the major capital requirements and cyclical volatility of the commercial jet engine business.
The Geared Turbofan Crisis
Despite its scale, RTX has been managing a multi-billion dollar crisis within its Pratt & Whitney division. The company discovered a rare manufacturing flaw involving contaminated powdered metal used to forge critical engine parts (turbine disks) in hundreds of its flagship Geared Turbofan (GTF) engines. The crisis forced airlines globally to ground hundreds of Airbus A320neo aircraft for time-consuming, unscheduled engine inspections and replacements. RTX took a charge of about $3 billion in 2023 for compensation and repairs. Even so, sales reached $88.6 billion in 2025 and backlog hit $289 billion by mid-2026.
