Exhibit 99.1 BLACKROCK TCP CAPITAL CORP. ANNOUNCES 2023 FINANCIAL RESULTS INCLUDING FOURTH QUARTER NET INVESTMENT INCOME OF $0.44 PER SHARE; DECLARES FIRST QUARTER DIVIDEND OF $0.34 PER SHARE; 47 CONSECUTIVE QUARTERS OF DIVIDEND COVERAGE SANTA MONICA, Calif., February 29, 2024 - BlackRock TCP Capital Corp. (“we,” “us,” “our,” “TCPC” or the “Company”), a business development company (NASDAQ: TCPC), today announced its financial results for the fourth quarter and year ended December 31, 2023 and filed its For ...