Company: MRCY
Filing Date: 2025-09-10
Form Type: DEF 14A
Source: 0001049521-25-000029
Chunk: 44

Company: MERCURY SYSTEMS INC
Filing Date: 2025-09-10
Form: DEF 14A
Chunk 44
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 |     |              |     |                               | 16,135,941 |     |                  |     | 367,694 |
| All non-employee directors as a group                     |     |              |     |                               |  1,614,479 |     |                  |     |  45,696 |
| Employees as a group (excluding named executive officers) |     |              |     |                               | 24,414,243 |     |                  |     | 603,278 |

#### Required Vote
Approval of the 2025 Plan requires the affirmative FOR vote of a majority of the votes cast on the proposal. Unless marked to the contrary, proxies received will be voted FOR approval of the 2025 Plan.

#### Recommendation
<div align='center'>The Board of Directors recommends a vote FOR the 2025 Plan.

35</div>

#### PROPOSAL 4: RATIFICATION OF APPOINTMENT OF

### INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
The Audit Committee of the Board of Directors has appointed KPMG LLP as our independent registered public accounting firm for the fiscal year ending July 3, 2026. We are asking shareholders to ratify this appointment. Although ratification by shareholders is not required by law or by our by-laws, the Audit Committee believes that submission of its selection to shareholders is a matter of good corporate governance. Even if the selection is ratified, the Audit Committee, in its discretion, may select a different independent registered public accounting firm at any time if the Audit Committee believes that such a change would be in the best interests of Mercury and our shareholders. If our shareholders do not ratify the selection of KPMG, the Audit Committee will take that fact into consideration, together with such other factors it deems relevant, in determining its next selection of an independent registered public accounting firm.

Representatives of KPMG will attend the Annual Meeting, where they will have the opportunity to make a statement if they wish to do so and will be available to answer appropriate questions from shareholders.

#### Required Vote
Approval of the ratification of the appointment of KPMG as our independent registered public accounting firm for fiscal 2026 requires the affirmative FOR vote of a majority of the votes cast on the proposal. Unless marked to the contrary, proxies received will be voted FOR approval of the ratification of the appointment.

#### Recommendation
The Board of Directors recommends a vote FOR the ratification of the appointment of KPMG as our independent registered public accounting firm for