Solidarity in the context of work and employment relations traditionally was perceived within organised labour and class politics. However, this limitation has been criticized by scholars for being exclusionary with regards to questions e.g. of gender, precarious work and non-organized working sectors (Liedmann 2020). Likewise, transnationalisation and globalization affect employment relations massively. It is, hence, necessary to scrutinize places as well as motives for acts of transnational solidarity at work in Europe. In our project, we link the traditional organised labour perspective with a transnational employment relations context in order to uncover acts of transnational solidarity.