X0609 4 2026-08-27 0 0000866273 MATRIX SERVICE CO MTRX 0001409823 Cavanah Kevin S false 15333 JOHN F KENNEDY BOULEVARD SUITE 400 HOUSTON TX 77032 0 1 0 0 VP Finance & CFO 0 Common Stock 2026-08-27 4 M 0 4307 A 91420 D Common Stock 2026-08-27 4 D 0 4307 10.91 D 87113 D Common Stock 2026-08-27 4 F 0 1485 10.91 D 85628 D Common Stock 2026-08-27 4 M 0 3009 A 88637 D Common Stock 2026-08-27 4 D 0 3009 10.91 D 85628 D Common Stock 2026-08-27 4 F 0 1108 10.91 D 84520 D Common Stock 2026-08-29 4 M 0 6176 A 90696 D Common Stock 2026-08-29 4 D 0 6176 10.83 D 84520 D Common Stock 2026-08-29 4 F 0 2130 10.83 D 82390 D Common Stock 2026-08-30 4 M 0 4569 A 86959 D Common Stock 2026-08-30 4 D 0 4569 10.83 D 82390 D Common Stock 2026-08-30 4 F 0 1576 10.83 D 80814 D Restricted Stock Units 2026-08-27 4 M 0 4307 0 D 2025-08-27 2028-08-27 Common Stock 4307 8614 D Restricted Stock Units 2026-08-27 4 M 0 3009 0 D 2026-08-27 2029-08-27 Common Stock 3009 9026 D Restricted Stock Units 2026-08-29 4 M 0 6176 0 D 2024-08-29 2027-08-29 Common Stock 6176 6175 D Restricted Stock Units 2026-08-30 4 M 0 4569 0 D 2023-08-30 2026-08-30 Common Stock 4569 0 D 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. 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. Kevin S. Cavanah 2026-08-31