Initial Statement of Beneficial Ownership

This filing is an Initial Statement of Beneficial Ownership (Form 3) for Francis C. Mahoney, reporting ownership of Blackrock Core Bond Trust (BHK). The report covers the period ending September 8, 2026. Mr. Mahoney is a director of the issuer. The filing indicates that no securities are directly owned by Mr. Mahoney, as noted by "noSecuritiesOwned": "1". The signature date is September 17, 2026, with Gladys Chang acting as Attorney-in-Fact.