ISE CEO Gary Katz, who calls the ISE the original “ice” exchange, took the ALS Ice Bucket Challenge today in front of a throng of ISE employees.  Three employees won a drawing to pour a bucket of ice cold water over his head.

Katz called out KCG’s Daniel Coleman, OCC’s Michael Cahill and CBOE’s Ed Tilly to take the challenge.

Here is Katz taking the challenge:

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