Accelleron Industries AG / CH1169360919

Ad hoc announcements pursuant to Art. 53 LR Accelleron, propelled by high demand and market share gains, reports outstanding half-year results Further gains in market share for turbochargers and strong demand for marine services and power applications Revenues reached USD 608.0 million, +20.3% year-on-year Operational EBITA increased to USD 154.9 million (+20.8%) Net income increased to USD 114.7 million (+29.5%) Expected constant-currency revenue growth of 16-19% in 2025 reaffirmed EBITA margin of 24-25% expected, due to the current tariff situation Baden, Switzerland, August 27, 2025. Accelleron, a global technology leader in turbocharging, fuel injection, and digital solutions in the marine and energy industries, continued on its growth trajectory in the first six months of 2025, achieving high revenue growth and strong profitability. “Our impressive revenue growth was driven by further gains in market share for turbochargers, as well as strong market demand for marine services, especially retrofits, and for backup, balancing and prime power applications. We also saw sustained high demand for fuel injection systems and above-average orders in the rail sector,” said Accelleron CEO Daniel Bischofberger. “The markets have not cooled down in the first half-year despite geopolitical disruptions. We’ve been firing on all cylinders to meet demand and are optimistic about volumes in the second half-year.” Revenues in the first six months of 2025 reached USD 608.0 million, representing a year-on-year increase of 20.3% (20.1% at constant currency, 18.5% organic). Accelleron’s operational EBITA increased by 20.8% compared to the same period of last year, reaching USD 154.9 million. The operational EBITA margin rose by 0.1 percentage points to 25.5%. Net income increased by USD 26.1 million, or 29.5%, to USD 114.7 million. Free cash flow conversion stood at 70.3% (H1 2024: 34.4%). Medium & Low Speed segment Revenues in the Medium & Low Speed segment increased by USD 73.0 million, or 18.9% (16.6% organic), to USD 458.8 million compared to the first half of 2024. Overall, the marine business performed strongly. Accelleron further increased its market share in new-builds, and demand for retrofits and upgrade services picked up significantly. Accelleron also continued to expand full-cover service agreements, reinforcing them as an important strategic pillar to further increase service penetration. Furthermore, demand for fuel injection systems remained high in the first half of 2025, supported by increased capacity in the OMT factories to ensure timely customer delivery. In the power plant market, new-build activity for medium-speed power generation has picked up again. The first projects for larger power plants with Accelleron turbochargers have been contracted. Overall, demand for gas-fired prime power applications increased across multiple regions. Accelleron also received above-average orders for turbochargers used in diesel-electric locomotives. Operational EBITA increased by USD 19.1 million, or 19.7%, to USD 116.2 million, compared to the previous year. The operational EBITA margin increased by 0.1 percentage points to 25.3%. The operating leverage resulting from the additional life-cycle volume was absorbed by strategic investments and was also impacted by additional costs along the value chain. High Speed segment Revenues in the High Speed segment increased by USD 29.5 million, or 24.6% (24.9% organic), to USD 149.2 million compared to the first half of 2024. Accelleron continued to seize opportunities in data center backup and increasingly prime power solutions, particularly in the US, while demand for gas compression remained in line with expectations. Operational EBITA increased by USD 7.6 million, or 24.4%, to USD 38.7 million, compared to the previous year. Due to the fast-growing new business and additional costs along the value chain, the operational EBITA margin decreased by 0.1 percentage points, to 25.9%. Positive outlook despite geopolitical uncertainty “While our full-year outlook for the marine and energy markets remains positive, the new 39% US tariff on Swiss goods poses a challenge with multiple unknowns, especially in the short term. We are determined to secure our growing US business by reviewing our pricing strategy, reconfiguring value chains, and enhancing operational efficiencies to maintain our competitive advantage,” said Bischofberger. Accelleron reaffirms its July revenue guidance, expecting constant-currency revenue growth of 16-19% in 2025. Regarding the operational EBITA margin, due to the current tariff situation, Accelleron is lowering its guidance corridor by one percentage point and now expects an EBITA margin for 2025 of 24-25%. The 2025 half-year report is available on the website at: https://accelleron.com/investors/financial-reports/half-year-report-2025

	Six-month period ended Jun. 30
(USD in millions)	2025	2024	Change in %	Organic[1]
Revenues	608.0	505.5	20.3%	18.5%
Gross profit	265.3	231.3	14.7%
as % of revenues	43.6%	45.8%	(2.2 ppts)
Income from operations	141.9	116.3	22.0%
Operational EBITA1	154.9	128.2	20.8%
as % of revenues	25.5%	25.4%	0.1 ppts
Net income	114.7	88.6	29.5%
as % of revenues	18.9%	17.5%	1.4 ppts
Cash flow from operating activities	105.9	42.5	149.2%
Free cash flow1	80.6	30.5	164.3%
Free cash flow conversion1	70.3%	34.4%	35.9 ppts
Basic earnings per share (USD)	1.17	0.90	30.0%
Net leverage1	0.8	0.9	(11.1%)

Accelleron Industries Ltd (ACLN: SIX Swiss Ex) is accelerating sustainability in the marine and energy industries as a global technology leader in turbocharging, fuel injection, and digital solutions for heavy-duty applications. Building on a heritage of over 100 years as a trusted industry partner, the company serves customers in more than 100 locations in over 50 countries. Accelleron’s 3,000 employees are continuously innovating to deliver best-in-class products, services, and solutions that are mission-critical for the energy transition. Key dates 2026 March 12, 2026: Full-Year Report 2025; Investor and media conferences April 28, 2026: Annual General Meeting Media resources Images and other digital assets are available under Media resources (accelleron.com). For more information please contact: 

Investor Relations Michael Daiber Phone: +41 79 698 60 85 Email: investors@accelleron-industries.com   Media Relations Sandro Hofer Phone: +41 79 644 76 55 Email: media@accelleron-industries.com
Accelleron Industries Ltd Bruggerstrasse 71A 5400 Baden Schweiz

 1 Alternative performance measures In this ad hoc announcement, we use certain non-U.S. GAAP financial measures and alternative performance measures that are not required by, or presented in accordance with, U.S. GAAP. Accelleron presents non-U.S. GAAP financial measures and alternative performance measures because they are used by management in monitoring the business and because Accelleron believes that these non-U.S. GAAP financial measures and similar measures are frequently used by securities analysts, investors, and other interested parties in evaluating companies in its industry. This provides better transparency and year-on-year comparability. A list of the definitions of the non-U.S. GAAP financial measures and alternative performance measures as used by Accelleron in general and in this ad hoc announcement can be found on https://accelleron.com/investors/performance-measures. Disclaimer This announcement includes forward-looking information and statements, including statements concerning the outlook for Accelleron?s businesses. These statements are based on current expectations, estimates and projections about the factors that may affect the company’s future performance, including global economic conditions, and the economic conditions of the regions and industries that are major markets for Accelleron. There are numerous risks, uncertainties, and other factors, many of which are beyond Accelleron?s control, that could cause the company’s actual results to differ materially from the forward-looking information and statements made in this announcement and which could affect the company’s ability to achieve its stated targets. Although Accelleron believes that its expectations reflected in any such forward-looking statement are based upon reasonable assumptions, it can give no assurance that those expectations will be achieved.