Limited Power of Attorney for James Nathaniel Powell

James Nathaniel Powell, the Chief Executive Officer of Longeveron Inc., has executed a Limited Power of Attorney (POA) appointing Paul T. Lehr and Lisa A. Locklear as his attorneys-in-fact. The POA grants them the authority to perform various actions on his behalf, including filing Forms 3, 4, and 5 with the SEC, updating EDGAR access codes, and obtaining information on transactions in the company's securities. The POA remains in effect until Powell is no longer required to file these forms or until he revokes it in writing. The document also includes a footnote indicating that Powell's reported shares include Restricted Stock Units (RSUs) subject to future vesting.