Clemens provides advice in both national and cross-border M&A transactions that covers every aspect of the deal. One particular focus of his practice is advising financial investors, strategic investors and companies in transactions involving innovative tech enterprises demonstrating strong growth. This has especially included venture capital and growth financing matters.

Some of Clemens' latest venture capital advising matters have been for example Accel's investments in Celonis, Tencent's investments in Scalable Capital, N26 and Lilium, and SE Ventures' investment in Ostrom, as well CMBlu's and ottonova's respective financing rounds. In addition, he advised the French fintech Qonto on the acquisition of its German competitor Penta, as well as the shareholders of the sales intelligence startup Echobot on its merger with Leadfeeder and the simultaneous investment by Great Hill Partners.

In private equity, Clemens most recently advised Silver Lake on its public takeover of Software AG, as well as LANXESS on a joint venture with Advent for high-performance engineering materials.