UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarter Ended September 30, 2023 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number: 814-00899 BLACKROCK TCP CAPITAL CORP. (Exact Name of Registrant as Specified in Charter) Delaware 56-2594706 (State or Other Jurisdiction of Incorporation) (IRS Employer Identification N ...