Stock-Based Compensation	12 Months Ended
Jun. 30, 2025
Share-Based Payment Arrangement [Abstract]
Share-Based Payment Arrangement	Stock-Based Compensation Total stock-based compensation expense for the fiscal years ended June 30, 2025, June 30, 2024, and June 30, 2023 was $8.9 million, $7.7 million and $6.8 million, respectively. Measured but unrecognized stock-based compensation expense at 2025 was $7.8 million, all of which related to nonvested restricted stock units which are expected to be recognized as expense over a weighted average period of 1.6 years. We recognized excess tax expense (benefit) of $1.1 million, $(0.1) million, and $1.2 million related to stock-based compensation vesting for the fiscal years ended June 30, 2025, 2024, and 2023, respectively. Plan Information In November 2020, our stockholders approved the Matrix Service Company 2020 Stock and Incentive Compensation Plan (the "2020 Plan", which provides stock-based and cash-based incentives for officers, directors and other key employees. Stock options, restricted stock, restricted stock units, stock appreciation rights, performance shares and cash-based awards can be issued under this plan. Upon approval of the 2020 Plan, the 2018 Stock and Incentive Compensation Plan ("2018 Plan") was frozen with the exception of normal vesting and other activity associated with awards previously granted under the 2018 Plan. Shares awarded under the 2018 Plan that are subsequently forfeited or net settled for tax withholding purposes are returned to the treasury share pool and become available for grant under the 2020 Plan. The 2020 Plan was amended in November 2023 to increase the maximum authorized shares under the plan by 1,625,000 shares, increasing the total authorized shares under the 2020 Plan from 2,350,000 to 3,975,000 shares. Awards totaling 3,975,000 shares have been authorized under the 2020 Plan, as amended. There were 2,090,258 shares available for grant under the amended 2020 Plan as of June 30, 2025. Equity-settled Restricted Stock Units We have issued equity-settled restricted stock units under the following types of arrangements: •Time-based awards—Employee awards generally vest in four equal annual installments beginning one year after the grant date. The award agreements contain a provision that accelerates the vesting for retirement eligible participants and participants that become retirement eligible during the vesting period and who elect to retire more than one year after the date of the award. The award is forfeited if retirement occurs before the first anniversary of the award. Settlement still occurs on the normal vesting schedules. Director awards vest one year after the grant date. •Market-based awards—These awards are in the form of performance units which vest 3 years after the grant date only if our common stock achieves certain levels of total shareholder return when compared to the total shareholder return of a peer group of companies as selected by the Compensation Committee of the Board of Directors. The payout can range from zero to 200% of the original award depending on the Company's relative total shareholder return during the performance period. All awards under the 2020 Plan vest upon the death or disability of the participant or upon a change of control of the Company, provided that the successor company fails to assume or replace the awards in connection with that change of control event. If the successor company does assume the awards, then vesting of the awards will be accelerated in the event of an involuntary termination or other material adverse event that occurs in connection with or following the change of control. All awards prior to the 2020 Plan vest upon the death or disability of the participant or upon a change of control of the Company.

Total stock-based compensation expense for the fiscal years ended June 30, 2025, June 30, 2024, and June 30, 2023 was $8.9 million, $7.7 million and $6.8 million, respectively. Measured but unrecognized stock-based compensation expense at 2025 was $7.8 million, all of which related to nonvested restricted stock units which are expected to be recognized as expense over a weighted average period of 1.6 years. We recognized excess tax expense (benefit) of $1.1 million, $(0.1) million, and $1.2 million related to stock-based compensation vesting for the fiscal years ended June 30, 2025, 2024, and 2023, respectively.

In November 2020, our stockholders approved the Matrix Service Company 2020 Stock and Incentive Compensation Plan (the "2020 Plan", which provides stock-based and cash-based incentives for officers, directors and other key employees. Stock options, restricted stock, restricted stock units, stock appreciation rights, performance shares and cash-based awards can be issued under this plan. Upon approval of the 2020 Plan, the 2018 Stock and Incentive Compensation Plan ("2018 Plan") was frozen with the exception of normal vesting and other activity associated with awards previously granted under the 2018 Plan. Shares awarded under the 2018 Plan that are subsequently forfeited or net settled for tax withholding purposes are returned to the treasury share pool and become available for grant under the 2020 Plan. The 2020 Plan was amended in November 2023 to increase the maximum authorized shares under the plan by 1,625,000 shares, increasing the total authorized shares under the 2020 Plan from 2,350,000 to 3,975,000 shares.

•Time-based awards—Employee awards generally vest in four equal annual installments beginning one year after the grant date. The award agreements contain a provision that accelerates the vesting for retirement eligible participants and participants that become retirement eligible during the vesting period and who elect to retire more than one year after the date of the award. The award is forfeited if retirement occurs before the first anniversary of the award. Settlement still occurs on the normal vesting schedules. Director awards vest one year after the grant date.

•Market-based awards—These awards are in the form of performance units which vest 3 years after the grant date only if our common stock achieves certain levels of total shareholder return when compared to the total shareholder return of a peer group of companies as selected by the Compensation Committee of the Board of Directors. The payout can range from zero to 200% of the original award depending on the Company's relative total shareholder return during the performance period.

All awards under the 2020 Plan vest upon the death or disability of the participant or upon a change of control of the Company, provided that the successor company fails to assume or replace the awards in connection with that change of control event. If the successor company does assume the awards, then vesting of the awards will be accelerated in the event of an involuntary termination or other material adverse event that occurs in connection with or following the change of control. All awards prior to the 2020 Plan vest upon the death or disability of the participant or upon a change of control of the Company.