Company: MRCY
Filing Date: 2025-09-10
Form Type: DEF 14A
Source: 0001049521-25-000029
Chunk: 30

Company: MERCURY SYSTEMS INC
Filing Date: 2025-09-10
Form: DEF 14A
Chunk 30
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 |                                                | 4,832 |
| Barry R. Nearhos    |     |                                                | 4,832 |
| Scott Ostfeld (1)   |     |                                                |     — |
| Debora A. Plunkett  |     |                                                | 4,832 |

(1) Mr. Ostfeld assigns all of the compensation related to his service on our Board of Directors to JANA. As of June 27, 2025, the unvested deferred share unit awards held by JANA related to Mr. Ostfeld's service on the Board were for 4,832 shares.

#### Fiscal 2026
The Human Capital and Compensation Committee, with the assistance of the Committee's independent compensation consultant, performed its annual review of the Company's compensation for non-employee directors. Based on market data, including data for our peer group, the Committee recommended, and the Board of Directors approved, the following changes to the compensation for non-employee directors for fiscal 2026: (i) an increase in the annual cash retainer by $10,000; (ii) an increase in the cash retainer for the Lead Independent Director by $5,000; and (iii) an increase in the amount of the annual equity award by $10,000.

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### EQUITY COMPENSATION PLANS
The following table sets forth information as of June 27, 2025 with respect to existing compensation plans under which our equity securities are authorized for issuance.

| Plan Category                                          |     | Number ofSecurities to beIssuedupon Exercise ofOutstandingOptions,Warrants andRights(1) |         |     | Weighted-Average  
 Exercise Price of 
 Outstanding       
 Options, Warrants 
 and Rights        |       |     | Number of Securities Remaining Available for Future Issuance under Equity Compensation Plans (excluding securities reflected in the first column) |           |
|:-------------------------------------------------------|:----|:----------------------------------------------------------------------------------------|--------:|:----|:------------------|------:|:----|:--------------------------------------------------------------------------------------------------------------------------------------------------|----------:|
| Equity compensation plans approved by shareholders (2) |     |                                                                                         | 934,000 |     | $                 | 45.00 |     |                                                                                                                                                   | 3,810,001 |
| Equity compensation plans not approved by shareholders |     |                                                                                         |       — |     |                   |     — |     |                                                                                                                                                   |         — |
| TOTAL                                                  |