In partnership with management, Arlington strengthened Stellant’s storied heritage through major investments in manufacturing infrastructure, new product development and human capital

Arlington Capital Partners, a Washington, D.C.-area private investment firm specializing in government regulated industries, today announced it has agreed to sell Stellant Systems, Inc (“Stellant” or “the Company”), a premier designer and manufacturer of radio frequency (“RF”) and microwave amplification products, to TransDigm Group Incorporated ("TransDigm Group") (NYSE: TDG), a leading global designer, producer and supplier of highly engineered aircraft components, for $960 million.

Headquartered in Torrance, CA, Stellant designs and manufactures vacuum electron devices, solid state power amplifiers and related RF components for the defense, space, medical and industrial markets. The Company supports critical space, radar, missile and secure communications platforms for the Department of War and allied militaries globally. Stellant operates across four U.S. facilities, totaling more than 700,000 square feet of advanced manufacturing space, and employs approximately 950 people.

Peter Manos, a Managing Partner at Arlington Capital Partners, said: “Stellant is another example of an IP-rich strategic carve out creating an Arlington platform company where organic and inorganic investment in people, research and development, product expansion and manufacturing capability and capacity has created a highly sought-after asset. It has been a remarkable journey working alongside Keith and the broader Stellant management team as we scaled an important manufacturer with what we hope will be a multi-generation legacy. TransDigm Group is the perfect long-term home for Stellant, and its interest in partnering with the Company is a testament to Stellant’s strength and its role as a valued partner to its customers.”

“I am incredibly proud of what Stellant has been able to accomplish for its customers and the broader defense ecosystem,” said Keith Barclay, CEO of Stellant Systems. “With significant improvements in operational efficiency and an exciting pipeline of new products, Stellant has never been stronger than it is today. On behalf of the entire Stellant team, I am sincerely grateful for Arlington’s partnership, and we are confident that TransDigm Group is the right partner for our next phase of growth.”

Ben Ramundo, a Managing Director at Arlington Capital Partners, added: “Throughout the course of Arlington’s stewardship, Stellant significantly improved on-time delivery and created an employee-centric culture with an added focus on high-quality customer outcomes. Our investment in Stellant is consistent with Arlington’s long-term, growth-oriented philosophy and deepens our expertise in defense electronics and related technologies, where we see a significant opportunity to build industry-leading platforms that deliver innovation and solve supply chain bottlenecks for the national security community.”

Harris Williams served as exclusive financial advisor and Kirkland & Ellis served as legal counsel to Arlington and Stellant during the transaction.

The transaction is expected to close in 2026, subject to customary regulatory approvals and closing conditions.

About Stellant Systems, Inc.

Stellant Systems is a premier manufacturer of critical spectrum RF/Microwave power amplification products to the space, defense, medical, science, and industrial markets for both domestic and international customers. Stellant has four domestic manufacturing facilities and approximately 950 employees.

About Arlington Capital Partners

Arlington Capital Partners is a Washington, D.C.-area private investment firm specializing in government-regulated industries. Focused on the aerospace and defense, government services and technology, and healthcare sectors, the Firm partners with founders and entrepreneurs to build platforms of strategic importance to national priorities. Operating in markets with high barriers to entry, Arlington looks to partner with organizations within these industries that save lives, improve effectiveness, and reduce costs. Since inception in 1999, Arlington has invested in approximately 200 companies and raised over $14 billion in committed capital. For more information, visit Arlington’s website at http://www.arlingtoncap.com and follow Arlington on LinkedIn.

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