No observed cheques in the sources we track. That is a limit of our coverage, not a finding about this organisation.
From their own site: “The Chicago Booth Angels Network of Chicago and New York (CBAN Chicago & New York) is a nonprofit, affinity organization founded and run by alumni of the University of Chicago Booth School of Business.”
An announcement gives the size of the round, not the size of this investor's cheque. The only rounds that imply a cheque are those where they were the sole named investor.
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