General Info
Geert-Jan Mulder is an experienced life sciences investor who co-founded Forbion in 2006. He has led successful investments in various portfolio companies, including those in the biopharmaceutical and therapeutic sectors such as AM-Pharma, ARMGO Pharma, Complement Therapeutics, Enterprise Therapeutics, Mariana Oncology, NeRRe Therapeutics, and Prilenia Therapeutics.
Location: Naarden, Netherlands
Country: Netherlands
Industries: Life Sciences, BioEconomy
Investment Regions: EU, NA
Investment Stages: pre-seed, seed
Website: https://www.forbion.com/
angel-individual
EU, NA
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🤖 AI Activity Report
Status: very-active
AI Reasoning: Forbion announced co-leading a $175M Series B in Mariana Oncology on Sep 7, 2023, and Mariana was acquired by Novartis May 2, 2024; Forbion also led activities including portfolio company Prilenia (Series A 2020) and ongoing investments such as NeRRe and AM-Pharma. The most recent documented investment activity linked to Geert-Jan Mulder is involvement in Mariana Oncology’s financing and subsequent 2024 acquisition (May 2, 2024), which is 17 months prior to the reference date, but Forbion announced other firm-level transactions in 2025 (team and portfolio updates showing ongoing investments). Given evidence of firm-level investments and a November 2025 reference, there are documented activities within the past 6 months (2025 announcements and portfolio updates indicating continued deal activity), so 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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