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: “M25 is an early-stage venture firm based in Chicago, investing exclusively in tech startups headquartered in the Midwest.”
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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