Executive Summary
TransDigm reported fiscal 2025 net sales of $8,831 million, up 11.2%, with operating margin expanding to 47.2% from 44.5%. Net income reached $2,074 million as strong commercial aftermarket and defense demand offset OEM production headwinds.
What happened
TransDigm generated net sales of $8,831 million in fiscal 2025, an increase of $891 million or 11.2% compared to fiscal 2024. Organic sales contributed $615 million of growth (7.7%), while acquisitions added $276 million (3.5%). The Power & Control segment grew 15.0% to $4,559 million, and Airframe increased 8.0% to $4,112 million. Gross profit reached $5,311 million, representing 60.1% of net sales compared to 58.8% in the prior year. Income from operations increased to $4,165 million (47.2% margin) from $3,531 million (44.5% margin). Net income attributable to TD Group rose to $2,074 million from $1,714 million, while earnings per share increased to $32.08 from $25.62. EBITDA As Defined improved to $4,760 million (53.9% of sales) from $4,173 million (52.6% of sales). The organic growth was primarily driven by increases in defense and commercial aftermarket sales. Commercial aftermarket benefited from strong air travel demand with global air traffic surpassing pre-pandemic levels and passenger load factors reaching record levels in certain markets. Defense sales increased due to continued U.S. Government defense spending outlays. However, commercial OEM sales decreased as aircraft production rates at Boeing and Airbus remained well below pre-pandemic levels due to persistent supply chain struggles, labor challenges, and geopolitical issues. Cost of sales increased $252 million to $3,520 million but decreased as a percentage of net sales to 39.9% from 41.2%. Selling and administrative expenses decreased $35 million to $945 million, primarily due to lower non-cash stock compensation expense resulting from slower stock price appreciation compared to fiscal 2024. Interest expense increased $286 million to $1,572 million driven by higher outstanding borrowings and lower interest income. The weighted average interest rate for cash interest payments remained 6.3%. The effective tax rate improved to 21.1% from 22.6%.
Why it matters for investors
The margin expansion demonstrates the effectiveness of TransDigm's three core value drivers—obtaining profitable new business, improving cost structure, and pricing to reflect value—even as commercial OEM production remains constrained. The 270 basis point improvement in operating margin to 47.2% and gross margin expansion to 60.1% indicate strong pricing power and operational efficiency despite inflationary pressures. The company maintained its highly leveraged capital structure with total debt of $30,015 million while reducing cash to $2,808 million from $6,261 million, reflecting aggressive capital deployment through the $90 special dividend, $500 million in share repurchases, and $413 million in acquisitions. The business mix shift toward commercial aftermarket and defense—both higher-margin, more stable revenue streams—provides resilience against OEM production volatility. With approximately $11,000 million in debt refinancing completed, the company extended maturities and maintained approximately 75% fixed-rate debt exposure, managing interest rate risk. The strong cash flow generation of $2,038 million from operations supports the company's ability to service $1,572 million in annual interest expense while funding strategic acquisitions like the $757 million Simmonds purchase in October 2025. The business model continues to demonstrate pricing discipline in a portfolio concentrated almost exclusively in aerospace and defense, where the top ten customers represent approximately 40% of net sales but no single customer exceeds 10%.
Bullish points
Operating margin expanded 270 basis points to 47.2% and gross margin improved to 60.1%, demonstrating strong pricing power and operational leverage that more than offset inflationary cost pressures and reflect successful execution of the value-driven operating strategy.
Commercial aftermarket sales increased as global air traffic continues to surpass pre-pandemic levels with passenger load factors reaching record levels in certain markets, providing visibility into sustained demand for high-margin aftermarket parts and services.
Defense sales grew year-over-year supported by continued U.S. Government defense spending outlays and recent DOD budget increases driven by geopolitical challenges and military modernization efforts, diversifying revenue beyond commercial exposure.
EBITDA As Defined reached $4,760 million (53.9% margin), up 14.1% from prior year, generating sufficient cash flow to support $1,572 million in interest expense while funding acquisitions, dividends, and share repurchases without compromising operational investments.
Bearish points
Commercial OEM sales decreased as Boeing and Airbus production rates remain well below pre-pandemic levels due to persistent supply chain struggles and labor challenges, with uneven impact across TransDigm's operating units creating near-term revenue headwinds.
Total debt increased to $30,015 million from $24,880 million while cash declined to $2,808 million from $6,261 million, resulting in higher net leverage as the company deployed approximately $11,000 million in debt financing primarily for the $90 special dividend and acquisitions.
Interest expense rose $286 million to $1,572 million (17.8% of sales) due to higher outstanding borrowings, and approximately 25% of gross debt remains variable-rate exposure subject to Term SOFR fluctuations despite hedging arrangements.
The business remains concentrated almost exclusively in aerospace and defense with top ten customers representing approximately 40% of net sales, creating vulnerability to industry-specific disruptions, customer production changes, or defense budget reductions.
The company operates with stockholders' deficit of $9,686 million reflecting the highly leveraged capital structure and aggressive special dividend policy, limiting financial flexibility in the event of significant market disruption or prolonged industry downturn.
Key highlights
TransDigm operates as a leading global designer, producer and supplier of highly engineered proprietary aerospace components with significant aftermarket content. The company focuses on developing highly customized products and differentiates based on engineering, service and manufacturing capabilities. The fiscal 2025 organic sales growth of 7.7% was primarily driven by increases in defense and commercial aftermarket, while commercial OEM decreased due to production rate constraints at Boeing and Airbus. The company completed approximately $413 million in acquisitions during fiscal 2025, including Servotronics for approximately $133 million in July 2025, and subsequently acquired Simmonds for approximately $757 million in October 2025 using existing cash on hand. TransDigm refinanced approximately $11,000 million in debt during fiscal 2025, including issuing $2,650 million in 6.375% senior subordinated notes due 2033 to redeem the 5.500% 2027 notes, increasing the Securitization Facility from $650 million to $725 million, and completing $5,000 million in new debt issuances in August 2025 comprising $500 million in 6.250% 2034 Secured Notes, $2,000 million in 6.750% 2034 subordinated notes, and $2,500 million in Tranche M term loans at Term SOFR plus 2.50%. The Board authorized and declared an $90.00 per share special dividend in August 2025, paid in September 2025 with total cash payments of approximately $5,232 million funded by the new debt issuances and existing cash. The company repurchased 401,036 shares for $500 million during fiscal 2025 at an average price of $1,246.71 per share, and an additional 79,959 shares for $100 million in October 2025. In November 2025, the Board authorized an additional $5,000 million in share repurchases. As of September 30, 2025, the company had $2,808 million in cash and $857 million available on its revolving credit facility for total liquidity of $3,665 million. There is no maturity on any tranche of term loans or notes until August 2028. The company estimates capital expenditures in fiscal 2026 to be approximately 2.50% to 3.25% of net sales, funded using existing cash on hand for projects supporting the three core value-driven operating strategy.
Management commentary
Management stated that demand for air travel remained strong both domestically and internationally in fiscal 2025, with commercial aftermarket sales increasing primarily due to overall demand for air travel resulting in higher flight hours and utilization of passenger and freight aircraft as global air traffic continues to surpass pre-pandemic levels. Management noted that in recent months, international air traffic growth has been outpacing domestic growth and passenger load factors remain strong and have reached record levels in recent months in certain markets. Regarding commercial OEM, management indicated that airline demand for new aircraft remains high and the OEMs are working to increase aircraft production, but aircraft production rates remain well below pre-pandemic levels as the struggles in the OEM supply chain and labor challenges persist, along with geopolitical challenges, though progress continues to be made in the build rates. Management noted that Airbus has also encountered difficulties in ramping up production, and for fiscal 2025, the impact across TransDigm's operating units was uneven and varied. On defense, management stated the business fluctuates from year-to-year and is dependent on government budget constraints, timing of orders, macro and micro dynamics with respect to DOD procurement policy and the extent of global conflicts. Management noted that for a variety of reasons, the military spending outlook is very uncertain, though recent DOD budgets have trended upwards due to recent geopolitical challenge and conflicts and current military modernization efforts. Management indicated that tariffs did not have a significant impact on fiscal 2025 operating results and the company does not expect tariffs to have a significant impact on fiscal 2026 operating results, noting that TransDigm is primarily a domestic manufacturer. Management stated their belief that efforts to apply the three core value-driven operating strategy will continue to generate strong margins and provide sufficient cash provided by operating activities to meet interest obligations and liquidity needs. Management expressed belief that cash provided by operating activities and available borrowing capacity will enable the company to make strategic business acquisitions, pay dividends to shareholders and make opportunistic investments in its own stock, subject to restrictions in the Credit Agreement and market conditions.
What to watch next
Investors should monitor:
Commercial OEM production rate trajectory at Boeing and Airbus as supply chain constraints ease and labor challenges are resolved, which management indicated has been uneven across operating units and remains well below pre-pandemic levels.
Progression of U.S. Government defense spending given management's comment that the military spending outlook is very uncertain despite recent upward trends driven by geopolitical challenges and modernization efforts.
Commercial aftermarket demand sustainability as global air traffic growth continues, with management noting international growth is outpacing domestic and passenger load factors have reached record levels in certain markets.
Capital allocation priorities between acquisitions, special dividends, and share repurchases given the November 2025 authorization of an additional $5,000 million in share repurchases and the company's stated prioritization framework.
This summary is based solely on excerpts from the company's Form 10-K filing.