Sonnen Insolvent Despite €1B+ Investment, Restructuring Expert Says
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Ettlingen – October 28, 2026 -- Sonnen has become insolvent after more than €1 billion in investment, a case restructuring specialist Ulrich Kammerer says proves that capital cannot rescue a business model that does not pay its own way.
Kammerer says growth and high revenue do not guarantee survival
Kammerer, co-founder of UKMC eG, says he has accompanied more than 400 companies through restructuring. He argues that a company that spends more than it earns for years may only push its problem into the future when it raises fresh capital. In his view, the deciding question is whether a company can survive long term on its own strength, not how much money has been invested.