NEW YORK--(BUSINESS WIRE)--DellaCamera Capital Management, LLC, a beneficial holder of approximately 7.6% of the shares of Enzon Pharmaceuticals, Inc. (“Enzon” or the “Company”) (NASDAQ: ENZN) delivered a letter to the Board of Directors of the Company calling upon Enzon to immediately add former ImClone Systems Incorporated board members Dr. Alexander J. Denner and Professor Richard C. Mulligan to the Board of Directors of Enzon.