Walleye Capital's Chief Strategy Officer Jonathan Brenner is leaving the firm, the latest in a string of senior exits at the $9.4 billion hedge fund. Brenner, who joined in 2018 in a marketing and investor relations role and was promoted to partner in 2022, will exit the firm after a transition that will last through the first quarter of 2026, according to a quarterly investor update sent last month. A copy of the letter was seen by Business Insider.
According to Bloomberg, del Castano wrote articles for the Spanish-language news website The Objective containing strong rebukes against Trump and Spanish Prime Minister Pedro Sánchez. In one post, he criticized the president's "poor manners, his self-centeredness, his apparent lack of scruples, and his morally questionable nature," Bloomberg reported. When the publication went to Goldman for comment, the bank said it had not been aware of the articles, which The Objective then deleted.