I think you have to meet private investers and fund managers who have large funds and offcourse they would looking for similar opportunites. what is the investment outlay you are looking for? if you menation this some of the members might have some clues who could help you. Some idead below could help you
Business angels: These are high net worth individuals who invest their own money in startups and early-stage companies. You can find business angels through networks such as the Dutch Business Angel Network (DBAN).
Venture capital firms: These firms invest in startups and early-stage companies in exchange for equity. You can find venture capital firms in the Netherlands through organizations such as the Dutch Venture Capital Association (DVCA).
Crowdfunding platforms: These platforms allow you to raise money from a large number of people, usually via the internet. Some popular Dutch crowdfunding platforms include Symbid, Oneplanetcrowd and Kickstarter
Incubators and accelerators: These organizations provide startups with resources such as office space, mentorship, and funding. Many incubators and accelerators in the Netherlands have a specific focus, such as technology or sustainability, and can be a good way to connect with investors who are interested in your field.
Government grants: The Netherlands Enterprise Agency (RVO) offers various grants and subsidies for entrepreneurs and startups.