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 Methuselah Funds, LLC (M Fund) is designed to accelerate results in the longevity field, extending the healthy human lifespan. Our success is measured by financial return on investments and furthering the mission.”
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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