On December 29, 2021, Mastech Digital, Inc. entered into a Fourth Amendment to its Credit Agreement, dated as of July 13, 2017, and amended by that certain First Amendment, dated as of November 14, 2017, and Second Amendment, dated as of April 20, 2018 and Third Amendment dated October 1, 2020, by and among the Company, certain of its subsidiaries, PNC Bank, National Association, as administrative agent, swing loan lender and issuing lender, PNC Capital Markets LLC, as sole lead arranger and sole bookrunner, and certain financial institutions party thereto as lenders. The Fourth Amendment amends the Credit Agreement by, among other things, increasing the aggregate commitment amount of the revolving credit facility to the Company Entities (the Revolving Credit Facility) to $40 million, extending the maturity date of the term loan previously provided to the Company Entities pursuant to the Credit Agreement to October 1, 2024, extending the maturity date of the Revolving Credit Facility to December 29, 2026, changing the benchmark interest rate from LIBOR to the Bloomberg Short-Term Bank Yield Index (BSBY); and adding the ability to borrow in Euros and Pound Sterling under the Revolving Credit Facility.