Company: MRCY
Filing Date: 2025-11-05
Form Type: S-8
Source: 0001049521-25-000070
Chunk: 4

Company: MERCURY SYSTEMS INC
Filing Date: 2025-11-05
Form: S-8
Chunk 4
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2012)                                   |
| 4.5     |     | Articles of Amendment (incorporated herein by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K filed with the Commission on June 30, 2015)                                       |
| 4.6     |     | Articles of Amendment (incorporated herein by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K filed with the Commission on December 29, 2021)                                   |
| 4.7     |     | By-laws, amended and restated effective October 26, 2022 (incorporated herein by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K filed with the Commission on October 28, 2022) |
| 5.1*    |     | Opinion of Dechert LLP                                                                                                                                                                               |
| 23.1*   |     | Consent of KPMG LLP                                                                                                                                                                                  |
| 23.2    |     | Consent of Dechert LLP (contained in the opinion filed as Exhibit 5.1 to this Registration Statement)                                                                                                |
| 24.1    |     | Power of Attorney (included in signature page to this Registration Statement)                                                                                                                        |
| 99.1    |     | Mercury Systems, Inc. 2025 Long Term Incentive Plan (incorporated herein by reference to Appendix A to the Company’s Definitive Proxy Statement on Schedule 14A filed on September 10, 2025)         |
| 107*    |     | Calculation of Filing Fee Table                                                                                                                                                                      |
| *       |     | Filed herewith                                                                                                                                                                                       |

## ITEM 9. UNDERTAKINGS.
(a) The Company hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any