Huygens is a boutique tax advisory firm based in Amsterdam. It advises on Dutch and international tax issues pertaining to transactions, structuring, and transfer pricing. Private equity firms, real estate investors, start-ups, and high-net-worth individuals are clients. It is distinguished in corporate finance mandates. The firm was founded by partners Mark van Casteren, Rutger Hafkenscheid, Quirijn Knab, and Stephan Kraan on January 1, 2022.

The firm prepared transfer pricing valuation analysis in a Dutch tax administration dispute. It also advised a telecommunications client on a transfer pricing dispute pertaining to intra-group financing transactions.