This book provides a concise and clear overview of the fundamental concepts and essential formulas, tables, and facts from the fields of financial mathematics, actuarial science, and securities analysis. It is specifically tailored to the needs of students in finance and insurance disciplines and serves as an indispensable reference work for practitioners in the finance and insurance sectors. In the third edition, some tables have been newly included or updated (mortality tables). The introductory section on stochastic processes has been elaborated in more detail. Additionally, some corrections and minor additions have been made.