• Divestment or spin-off could raise shares by 40%, says source
• Siemens Energy: values constructive input on creating value
• Wind unit recovering after quality crisis from two years ago

FRANKFURT, Dec 9 (Reuters) - U.S.-based investor Ananym Capital has taken a stake in German power equipment manufacturer Siemens Energy (ENR1n.DE) , opens new tab and is asking the group's management to review its struggling wind division, a person familiar with the matter said on Tuesday.

According to Ananym, a divestment or spin-off of the business could raise Siemens Energy's shares by around 40%, the person said.

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The source did not disclose the size of the stake.

Ananym was not immediately available for comment outside business hours.

Siemens Energy said in a statement on Tuesday that it "values constructive input for creating sustainable value for shareholders, employees, customers and partners," and that it addressed the development of its wind unit at a recent capital markets day.

WIND BUSINESS IS STRUGGLING

Ananym was founded last year by Charlie Penner, the architect of a massive three-board-seat victory at Exxon Mobil (XOM.N) , opens new tab in 2021, and former P2 partner Alex Silver.

Siemens Gamesa, Siemens Energy's wind division, is still recovering from a quality crisis from two years ago, and posted an operating loss of 1.36 billion euros ($1.58 billion) in the fiscal year ended September.

The unit's ongoing losses have repeatedly driven calls by investors to review or even sell the business, but Siemens Energy has so far committed to turning the business around, touting the long-term prospects for wind energy overall.

The Financial Times first reported Ananym's engagement. ($1 = 0.8587 euros)

https://www.reuters.com/business/energy/ananym-capital-builds-stake-siemens-energy-launches-activist-campaign-ft-reports-2025-12-09/