Mastech Digital, Inc.

Rule 10b5-1 Trading Plans of Directors and Section 16 Officers

During the fiscal quarter ended June 30, 2025, none

of our directors or officers (as defined in Exchange Act Rule 16a-1(f)) informed us of the adoption, modification or termination of a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as those terms are defined in Regulation S-K, Item 408.

Rule 10b5-1 Trading Plans of the Company

On June 9, 2025, the Company entered into a Rule 10b5-1 and Rule 10b-18 Repurchase Plan (the “10b5-1 Plan”) under our share repurchase program. The 10b5-1 Plan is intended to satisfy the affirmative defense conditions of Exchange Act Rule 10b5-1(c) and authorizes the purchase of up to 406,568 shares of our Common Stock. The 10b5-1 Plan expires on February 8, 2026 if not otherwise terminated or amended. During the three months ended June 30, 2025, we did not purchase any shares of our Common Stock under the

10b5-1

Plan. Future repurchases may be made in the open market, through privately negotiated transactions, through block purchases or other purchase techniques, or by any combination of such methods, The Company has no obligation to repurchase any shares of Common Stock under the

10b5-1

Plan and may suspend or terminate the

10b5-1

Plan at any time.