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TransDigm Is Buying Stellant Systems—And The Synergies Are Eye-Popping!

TransDigm Group Incorporated has made headlines with its latest move to acquire Stellant Systems for approximately $960 million in cash. This acquisition, disclosed on December 31, 2025, continues TransDigm’s aggressive capital allocation strategy, which has already seen $7 billion deployed over fiscal 2025 through M&A and shareholder returns. The Stellant deal follows recent acquisitions like Servotronics and Simmonds Precision, reinforcing TransDigm’s strategic focus on acquiring proprietary aerospace businesses with strong aftermarket potential. Coming off a robust FY2025, where the company posted 11% organic growth in Q4 and full-year EBITDA margins of 54.2%, TransDigm also reaffirmed its disciplined approach to M&A and shareholder value creation. With Stellant Systems specializing in critical RF and microwave subsystems primarily for defense and space applications, the proposed acquisition fits squarely into TransDigm’s model of targeting niche, high-margin aerospace components.