X0609 4 2026-08-25 0 0000866273 MATRIX SERVICE CO MTRX 0002153371 MILLER DAVID (JAMES) false 15333 JOHN F KENNEDY BOULEVARD SUITE 400 HOUSTON TX 77032 0 1 0 0 VP & General Counsel 0 Common Stock 2026-08-25 4 A 0 5432 0 A 25979 D Common Stock 2026-08-27 4 M 0 1702 A 27681 D Common Stock 2026-08-27 4 D 0 1702 10.91 D 25979 D Common Stock 2026-08-27 4 F 0 669 10.91 D 25310 D Common Stock 2026-08-27 4 M 0 1607 A 26917 D Common Stock 2026-08-27 4 D 0 1607 10.91 D 25310 D Common Stock 2026-08-27 4 F 0 632 10.91 D 24678 D Common Stock 2026-08-29 4 M 0 2370 A 27048 D Common Stock 2026-08-29 4 D 0 2370 10.83 D 24678 D Common Stock 2026-08-29 4 F 0 932 10.83 D 23746 D Common Stock 2026-08-30 4 M 0 967 A 24713 D Common Stock 2026-08-30 4 D 0 967 10.83 D 23746 D Common Stock 2026-08-30 4 F 0 380 10.83 D 23366 D Restricted Stock Units 2026-08-25 4 A 0 5432 0 A 2027-08-25 2029-08-25 Common Stock 5432 5432 D Restricted Stock Units 2026-08-27 4 M 0 1702 0 D 2025-08-27 2028-08-27 Common Stock 1702 3404 D Restricted Stock Units 2026-08-27 4 M 0 1607 0 D 2026-08-27 2029-08-27 Common Stock 1607 4819 D Restricted Stock Units 2026-08-29 4 M 0 2370 0 D 2024-08-29 2027-08-29 Common Stock 2370 2369 D Restricted Stock Units 2026-08-30 4 M 0 967 0 D 2023-08-30 2026-08-30 Common Stock 967 0 D Restricted Stock Unit - each unit will entitle the reporting person to one share of Matrix Service Company Common Stock if and when the conditions of the restriction have been satisfied. For this grant, one-third will vest each year for the next three years on the anniversary dates. Each Restricted Stock Unit is the economic equivalent of one share of Matrix Service Company Common Stock. All Restricted Stock Units are settled solely in Cash when vested. Shares disposed to satisfy tax obligation due on vest date for Stock-Settled Restricted Stock Units. Each unit will entitle the reporting person to the Cash equivalent of one share of Matrix Service Company Common Stock if and when the conditions of the restriction have been satisfied. For this grant, one-third will vest each year for the next three years on the anniversary dates. For this service-based award of Cash-Settled Restricted Stock Units, 25% will vest each year from August 27, 2025 to August 27, 2028. For this service-based award of Cash-Settled Restricted Stock Units, 25% will vest each year from August 27, 2026 to August 27, 2029. For this service-based award of Cash-Settled Restricted Stock Units, 25% will vest each year from August 29, 2024 to August 29, 2027. For this service-based award of Cash-Settled Restricted Stock Units, 25% will vest each year from August 30, 2023 to August 30, 2026. David J. Miller 2026-09-04