Geoffrey Michael Wolterstorff (also known as Geoff Wolterstorff), a stockbroker based in Eau Claire, Wisconsin, and associated with Lifemark Securities Corp., has been sanctioned by the United States Securities and Exchange Commission (SEC). In the Matter of Geoffrey Wolterstorff, Administrative Proceeding File No. 3-21983 (July 29, 2024). According to the Order, between 2020 and 2022,…