General Info
Dr. Marianne Mertens focuses on high-tech start-ups in digital tech, industrial tech, life sciences, chemistry, and related business areas. She has been involved in investments in companies like Memo Therapeutics, BioVersys, ADC Therapeutics, Mariana Oncology, and more. Apollo Health Ventures, where she is a Partner, has recently closed a $180 million fund. Marianne’s investment check size is not specified. Her geographical preference is not explicitly mentioned.
Location:
Country: Germany
Industries:
Investment Regions: EU
Investment Stages: pre-seed, seed
angel-individual
EU
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🤖 AI Activity Report
Status: very-active
AI Reasoning: Apollo Health Ventures site and related news show Marianne Mertens involved in Therini Bio activities and Therini Bio had activity in 2025 (July 2025 AD trial mention). This indicates a recent investment/active involvement less than 6 months prior to the reference date. Therefore tag as very-active.
Angel activity thresholds:
Low Activity – Only known angel investments more than 12 months ago.
Active – Known angel investments between the last 12 and 6 months.
Very Active – Known angel investments in the last 6 months.
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