CR Energy AG is a Germany-based investment holding company focused on acquiring, founding, developing, and selling stakes in technology-driven companies in sustainable technologies, affordable housing, and wealth creation sectors. Incorporated in 2008 and headquartered in Kleinmachnow near Berlin, the company operates primarily in Germany through subsidiaries including Terrabau GmbH, a general contractor specializing in cost-efficient residential construction in eastern Germany cities such as Berlin and Leipzig with over 300 units in the pipeline emphasizing social and middle-class housing; Solartec, a provider of renewable energy solutions like rooftop solar systems, heat pumps, infrared heating, hydrogen storage, and energy optimization for residential and commercial buildings to meet green building standards and reduce emissions; and CR Opportunities, an asset manager offering development financing, bonds such as an €8 million 9.5% coupon issue for retail investors, and funds including a planned European Long-Term Investment Fund (ELTIF) targeting €100 million to invest in refurbishment properties leveraging synergies with Terrabau and Solartec. The company generates revenue from real estate rental (approximately €68.6 million in 2023), investment management, and property sales, with a workforce of five at the holding level and a historical net asset value compound annual growth rate of around 30% through 2023 driven by portfolio revaluations and dividends. Recent developments include increased ownership in Solartec to 100% via contribution-in-kind shares in 2023, the issuance of scrip dividend shares increasing the share count, plans for annual €200 million growth in assets under management at CR Opportunities through duplex and flat acquisitions, and a strategic shift toward 24/7 sustainable energy integration across projects; however, in May 2025 the company announced plans to file for insolvency proceedings due to lender reluctance to extend working capital loans and adverse market conditions, with proceedings opened in September 2025, though subsidiary projects were expected to continue unaffected amid ongoing investor talks for equity or debt.