Karman Space & Defense said it has entered into a definitive agreement to acquire Seemann Composites and Materials Sciences (MSC) in a deal valued at $220 million, marking the company’s expansion into the maritime defense market for submarines, autonomous undersea and surface vehicles, and other naval platforms.
Under the terms, Karman will pay $210 million in cash and approximately $10 million in Karman common shares. The transaction is subject to customary closing conditions and regulatory approvals and is expected to close in the first quarter of Karman’s fiscal year 2026. After closing, Seemann and MSC will operate as wholly owned subsidiaries.
Karman, which trades on the NYSE under the ticker KRMN, said the acquisition aligns with its strategy of delivering advanced systems for next-generation propulsion and shielding applications across high-priority national security missions spanning “deep sea to deep space.” The company said it is focused on integrated design, IP-protected products, and vertical integration to accelerate development and production for challenging environments.
Seemann, based in Gulfport, Mississippi, and MSC, based in Horsham, Pennsylvania, provide what Karman described as “bow-to-stern” composite systems, with a combined 95 years in business. Their technologies include sonar, acoustic, and signal mitigation solutions; subsea and surface propulsion systems; and missile and amphibious strategic launch products, with a customer base centered on U.S. Navy programs.
Karman said Seemann and MSC bring proprietary materials and resin formulations along with roughly 240,000 square feet of manufacturing space. The companies also add specialized production and testing capabilities, including advanced resin infusion, automated fiber placement, fabric weaving, fatigue testing, and 3D printing, which Karman said support its concept-through-production approach.
The company expects the acquisition to increase its exposure to multi-decade, funded U.S. Navy programs and to be immediately accretive in 2026 across major financial metrics, including revenue growth, funded backlog, EBITDA, earnings per share, and cash flow. Management also reaffirmed its previously issued fiscal year 2025 revenue and adjusted EBITDA guidance from November 6, 2025.
Karman said the acquisition builds on its earlier purchases of MG Resin and MTI, further expanding its advanced materials intellectual property portfolio and adding a material science team focused on next-generation materials and resin system design that can be leveraged across the company’s end markets.
KEY QUOTES:
“Entering the strategic maritime defense market, which is a critical element of near-peer nation state deterrence, has been on our strategic roadmap for years. The acquisitions of Seemann and MSC represent the natural expansion of the Karman platform into a compelling new market that is poised for decades of sustained growth. With a proven track record of performance, deep expertise in advanced materials, and differentiated manufacturing capabilities, these innovative companies are a natural fit with Karman.” “We look forward to leveraging the combined strength of the Karman, Seemann and MSC teams to continue delivering advanced technologies to the U.S. Navy and to other customers.”
Tony Koblinski, Chief Executive Officer, Karman Space & Defense
“We’ve known and respected the Karman team for nearly a decade, and we are thrilled to start this new chapter of our history as part of Karman. Seemann and MSC deliver specific capabilities in materials, design, testing and manufacturing, which will further enhance Karman’s impressive product lines and ability to rapidly and effectively address the near-peer nation state threats of today and tomorrow. The alignment of culture and capabilities with Karman provides a perfect fit for our team and will add value to our customers and to Karman’s shareholders.”
Sid Charbonnet, Chief Executive Officer, Seemann and MSC
“As the second generation of family leadership at Seemann, I am extremely proud of what we have accomplished. None of this would have been possible without the strong foundation my father, Bill Seemann, established in 1987. Based on his vision for the company to become a critical supplier to the maritime industrial base, Seemann has built a strong, growing position in this high priority defense sector, which will add value and diversity to the Karman strategy. We are excited to continue our legacy of excellence through innovation as part of the Karman team.”
Will Seemann, Chief Financial Officer, Seemann and MSC
