What Firefly Aerospace Inc. told the SEC could break it.

Firefly is extremely customer-concentrated — for 2025 its top five customers together accounted for over 86% of revenue, and its top five backlog customers were ~81% of its ~$1.4 billion backlog — so the loss of, delay by, or adverse financial change at any of these few customers (which include U.S. national-security/government buyers such as the U.S. Space Force) could materially reduce its revenue and backlog. (USSF captured as a named customer edge; the broader top-5 concentration is recorded here.)

“For the year ended December 31, 2025, our top five customers together accounted for over 86% of our revenue and our top five backlog customers accounted for approximately 81% of our backlog as of December 31, 2025.”

Firefly obtains certain hardware components, subsystems and other products from a limited group of suppliers and vendors, some of which are sole-source, and it does not have long-term binding agreements with all suppliers obligating continued supply; it manages this with non-binding contracts and buffer stock on long-lead items, but a supplier failure or loss of a sole/single source could disrupt manufacturing of its launch vehicles and space systems.

“We obtain certain of our hardware components, various subsystems and systems and other products and services from a limited group of suppliers and vendors, some of which are sole source suppliers and vendors.”

Although Firefly raised ~$932 million net in its August 2025 IPO, it carries secured debt — $260.0 million outstanding under its Revolving Credit Facility (guaranteed and secured by substantially all of its and certain subsidiaries' assets, with financial covenants) and a prior high-cost Term Loan B whose fixed rate was 13.875% and was set to rise to 19.135% in July 2026 — so as a capital-intensive, scaling launch company it depends on debt covenants/refinancing and continued capital to fund growth.

“As of December 31, 2025, $260.0 million in aggregate borrowings were outstanding under the Revolving Credit Facility.”

Firefly is subject to U.S. tariffs imposed since early 2025 on substantially all trading partners (with potential further tariffs and foreign countermeasures), and to retaliatory measures such as China's ban on rare-earth-mineral exports to the United States, which — together with periodic electronics/raw-material supply shortages and price increases — could raise costs and delay its production and development programs for launch vehicles.

“the impact of tariffs and retaliatory measures taken in response thereto, including controls on the export of rare earth minerals to the United States, such as China's ban on exports of rare earth minerals to the United States.”