Walberg & Cie. advises YAXI GmbH and its founders on strategic investment by Ernst REINER GmbH & Co. KG
Munich/Nuremberg, October 16, 2025 – YAXI GmbH (“YAXI”), a start-up in the field of open banking, has gained an experienced investor and strategic partner for digital security and high-quality home banking security solutions in Ernst REINER GmbH & Co. KG (“REINER”). REINER's investment strengthens YAXI's growth and innovative power and marks an important step in its continued positioning as a leading infrastructure provider for modern banking services.
YAXI was founded in 2022 by Dr. Vincent Haupert (CEO), Christopher Schramm (COO), and Andreas Stührk (CTO). YAXI offers a secure and flexible open banking infrastructure that enables companies to offer their users payment and account information services with the highest level of confidentiality. The technology deliberately dispenses with traditional server infrastructures and focuses on easy access, data protection, and user autonomy without imposing regulatory licensing costs on customers. A unique selling point of YAXI is that the technology makes transactions cryptographically secure and traceable, so that neither the company nor its customers ever have access to the login details. As a result, unlike other providers, YAXI does not require a PSD2 license. The white label product is already being used successfully: Flizpay, for example, works with YAXI to enable customers of the neobroker Trade Republic to top up their accounts.
REINER, based in Furtwangen in the Black Forest, is a family-run technology company with over 110 years of history. The REINER Group combines precision, innovation, and manufacturing expertise in the fields of marking and precision technology. The REINER Group includes the subsidiaries REINER SCT and HORRAY. Together, the companies represent a strong network of mechanics, technology, and digitalization. The company is represented worldwide by partners and has stood for quality, innovation, and reliability from the Black Forest since 1913. As a pioneering provider of digital authentication solutions, REINER complements the YAXI ecosystem with its many years of expertise in the areas of authentication and secure data transmission.
As part of the transaction, REINER acquired shares from the founders and invested additional seven-figure capital in YAXI through a capital increase. Following completion of the transaction, REINER holds 55 percent of the shares in YAXI, while the remaining 45 percent remain with the three founders. YAXI will use the additional capital specifically for expansion in Europe and the further development of innovative security and payment solutions. “With Reiner, we have a strong partner at our side who enjoys an excellent reputation as a reliable partner, especially in the banking and security environment,” said Dr. Vincent Haupert, commenting on the transaction. The founders and the entire YAXI team welcome the new partnership as a strategic milestone.
The Walberg & Cie. team led by Dr. Simon Sabel, Dr. Sebastian Binder, and Marc Wiesner, LL.M. (Yale), provided comprehensive legal and tax advice to the founders of YAXI on the transaction. The focus of the advice was on the legal and tax structuring of the investment and the preparation and negotiation of the complete investment documentation, in particular the investment agreement, the share purchase agreement (SPA), and the shareholders' agreement (SHA). The transaction underscores Walberg & Cie.'s expertise in advising on strategic partnerships between technology-oriented start-ups and established family businesses, where the different interests and cultures of both types of companies must be successfully combined in sustainable structures.
