X0306 4 2020-06-05 0 0001437226 Mastech Digital, Inc. MHH 0001668313 Gupta Vivek C/O MASTECH DIGITAL, INC. 1305 CHERRINGTON PKWY, BLDG 210, STE 400 MOON TOWNSHIP PA 15108 1 1 0 0 President and CEO Common Stock 2020-06-05 4 M 0 28495 3.63 A 28495 D Common Stock 2020-06-05 4 S 0 28495 20.6956 D 0 D Common Stock 2020-06-08 4 M 0 8599 3.63 A 8599 D Common Stock 2020-06-08 4 S 0 8599 21.1824 D 0 D Common Stock 2020-06-08 4 M 0 200 3.63 A 200 D Common Stock 2020-06-08 4 S 0 200 21.9703 D 0 D Employee Stock Option (Right to Buy) 3.63 2020-06-05 4 M 0 28495 0.00 D 2026-03-01 Common Stock 28495 308982 D Employee Stock Option (Right to Buy) 3.63 2020-06-08 4 M 0 8599 0.00 D 2026-03-01 Common Stock 8599 300383 D Employee Stock Option (Right to Buy) 3.63 2020-06-08 4 M 0 200 0.00 D 2026-03-01 Common Stock 200 300183 D The prices reported in Column 4 are weighted average prices. These shares were sold in multiple transactions at prices ranging from $20.17 to $21.06 inclusive. The reporting person undertakes to provide to Mastech Digital, Inc., any security holder of Mastech Digital, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4. The prices reported in Column 4 are weighted average prices. These shares were sold in multiple transactions at prices ranging from $20.90 to $21.69 inclusive. The reporting person undertakes to provide to Mastech Digital, Inc., any security holder of Mastech Digital, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form 4. The prices reported in Column 4 are weighted average prices. These shares were sold in multiple transactions at prices ranging from $21.94 to $22.00 inclusive. The reporting person undertakes to provide to Mastech Digital, Inc., any security holder of Mastech Digital, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (3) to this Form 4. 50,000 shares vested on March 1, 2017 and thereafter vest in equal 50,000 share installments through July 26, 2021. This amount has been adjusted pursuant to a stock split declared by Mastech Digital, Inc. on July 24, 2018. /s/ James J. Barnes, attorney in fact 2020-06-09