/Investor DB

Koolen and Partners — Full Portfolio

8 tracked investments · listed companies and verified rows first

Holiduholidu.comSeries A · Jan 2016 · $5M

Munich, DE

Johannes Siebers(Founder)inMichael Siebers(Founder)

Co-investors83NorthBootstrap EuropeClaret Capital PartnerscoparionKey1 CapitalNewtown Partners+6 more

Inncivioinncivio.comin𝕏Pre-Seed · May 2025

Inncivio provides AI-powered in-app guidance for fintech platforms to increase user conversion and retention by helping customers complete financial actions in real time.

AI & Machine LearningFintechSaaS

Ghassen(Co-founder)Anna(Co-founder)Félix(Co-founder)

Co-investorsEntrepreneurs Roundtable Accelerator (ERA)

Mysten Labsmystenlabs.comin𝕏Dec 2021

Mysten Labs builds infrastructure and tools for web3, focusing on making decentralized systems secure, reliable, and ready for mass adoption.

Cloud ComputingCrypto & Web3Deep TechDeveloper ToolsPalo Alto, US

Adeniyi Abiodun(Founder)inKostas Kryptos Chalkias(Founder)inSam Blackshear(Founder)inEvan Cheng(Founder)inGeorge Danezis(Founder)Kostas Chalkias(Founder)

Co-investorsa16z cryptoAlumni VenturesAndreessen HorowitzArrington CapitalBasecamp FundBig Brain Holdings+38 more

Parkbeeparkbee.comSeries B · Mar 2022 · $33M

ParkBee optimizes urban parking by connecting drivers, property owners, and municipalities through a digital platform that finds, books, and manages parking spaces across cities.

B2B MarketplacesMarketplacesMobility & TransportationPropTechAmsterdam, NL

Co-investorsTIIN Capital

Skoonskoon.worldinSeries A · Oct 2023 · $5M

Skoon operates a distributed energy platform that orchestrates flexibility from batteries, EVs, and other distributed assets to relieve grid congestion, reduce renewable curtailment, and shorten grid connection wait times.

CleantechEnergyIoTSaaSNetherlands, NL

Co-investorsBlue Bear Capital PartnersGraduate Entrepreneur

Sympowersympower.netinSeries B · Mar 2021 · $6M

Sympower operates a platform providing demand response and energy flexibility services that help balance national electricity grids across European markets.

AI & Machine LearningCleantechClimate TechEnergyEnterprise Software

Simon Bushell(Founder)inGeorg Rute(Founder)

Co-investorsACTIVATE CAPITAL PARTNERSExpon CapitalKickstart InnovationRockstartStartGreen CapitalACTivate Capital+1 more

Wundermartwundermart.comJul 2021 · $12M

Wundermart provides AI-powered food and beverage solutions for hotels, including automated lobby shops, all-day breakfast options, and unmanned bars with 24/7 grab-and-go purchasing.

AI & Machine LearningFoodTechRetail Tech

Co-investorsSlingshot Ventures

Other

Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.

Florbs

Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.