Kof-K Kosher Supervision כף-K

Kof-K is a kosher certification agency based in Teaneck, New Jersey, and one of the "Big Five" US agencies. As of 2010 over a third of food sold in the US carried kosher supervision, 80% of it from the Big Five. Its founder and rabbinic administrator was Rabbi Dr. Harvey (Zecharia) Senter, who passed away on April 4, 2021 (the last day of Pesach); it is now headed by two of his sons. It certifies mostly products, and some eateries.