Citadel rebuked New York City Mayor Zohran Mamdani for singling out Chief Executive Officer Ken Griffin in a push for a new pied-à-terre tax, escalating a public dispute over how aggressively New York should target wealthy non-resident homeowners.

In a social media video filmed outside Griffin’s residence at 220 Central Park South and timed to tax day, Mamdani unveiled a proposed levy that would impose an annual surcharge on one- to three-family homes, condominiums and co-ops valued above $5 million when the owner’s primary residence is outside New York City.

Citadel denounced the mayor’s move with Chief Operating Officer Gerald Beeson saying in an internal memo obtained by CNBC that targeting Griffin showed “ignorance and disdain” toward contributors to the city’s economy.

“It is shameful that he used Ken’s name as the example of those who supposedly aren’t carrying their fair share of the burdens associated with New York City’s often costly and wasteful spending,” Beeson wrote. “In doing so, the mayor has once again manifested the ignorance and disdain of the elite political class towards those who have been consistently committed to building one of the greatest cities in the world.”