Tiven buys Sonnen from Shell, capping a billion-euro loss for the oil major

What's the deal? Munich investment firm Tiven, the family office of AureliusDealroom has a profile for this one. Try Dealroom → founder Gert PurkertDealroom has a profile for this one. Try Dealroom →, is acquiring battery storage maker Sonnen from oil major ShellDealroom has a profile for this one. Try Dealroom →. Founded in 2010, Sonnen will now be restructured and prepared for resale.

The price: The purchase price could be in the low triple-digit millions, according to insiders cited by Handelsblatt . Shell reportedly paid around €500 million for the company in 2019, meaning the sale marks a billion-euro loss for the oil major.

Why now? Sonnen had been in crisis mode in 2026. Shell is offloading a business that never delivered on its clean-energy ambitions.

What's the endgame? Tiven plans to turn the company around and sell it on. The strategy mirrors the restructuring playbook associated with Purkert's Aurelius background.

The signal: The deal underscores how large oil companies are retreating from earlier bets on the energy transition, handing distressed clean-tech assets to specialist investors willing to bet on a rebuild.

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