Form 4 for MRCY MERCURY SYSTEMS INC
Accepted 2026-08-27 16:54:31 ET · period of report 2026-08-25 · accession 0001049521-26-000063 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-08-27 16:54 | 2026-08-25+ | MRCY | Ballhaus William L | COB, Pres, CEO, Dir | M - OptEx | $43.00 | +222.2K | 410.9K | +118% | +$9.55M |
| DM | 2026-08-27 16:54 | 2026-08-25+ | MRCY | Ballhaus William L | COB, Pres, CEO, Dir | S - Sale+OE | $87.72 | -160.2K | 361.8K | -31% | -$14.05M |
| DM | 2026-08-27 16:54 | 2026-08-25+ | MRCY | Ballhaus William L | COB, Pres, CEO, Dir | M - OptEx | $0.00 | -222.2K | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-08-25 | M | A | 153,676 | $43.00 | 453,512.33 | D | — | — | (F1) Represents the exercise of a stock option award scheduled to expire on August 17, 2027. |
| 2 | Common | Common Stock | 2026-08-25 | S | D | 107,628 | $87.09 | 345,884.33 | D | — | — | (F2) Represents the sale of shares intended solely to cover the exercise price, applicable withholding taxes and related transaction costs of stock options exercised on the same date. (F3) This transaction was executed in multiple trades at prices ranging from $86.800 to $87.800. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. |
| 3 | Common | Common Stock | 2026-08-25 | S | D | 3,448 | $87.99 | 342,436.33 | D | — | — | (F2) Represents the sale of shares intended solely to cover the exercise price, applicable withholding taxes and related transaction costs of stock options exercised on the same date. (F4) This transaction was executed in multiple trades at prices ranging from $87.820 to $88.325. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. |
| 4 | Common | Common Stock | 2026-08-26 | M | A | 68,476 | $43.00 | 410,912.33 | D | — | — | (F1) Represents the exercise of a stock option award scheduled to expire on August 17, 2027. |
| 5 | Common | Common Stock | 2026-08-26 | S | D | 38,276 | $88.91 | 372,636.33 | D | — | — | (F2) Represents the sale of shares intended solely to cover the exercise price, applicable withholding taxes and related transaction costs of stock options exercised on the same date. (F5) This transaction was executed in multiple trades at prices ranging from $88.500 to $89.435. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. |
| 6 | Common | Common Stock | 2026-08-26 | S | D | 10,814 | $89.74 | 361,822.33 | D | — | — | (F2) Represents the sale of shares intended solely to cover the exercise price, applicable withholding taxes and related transaction costs of stock options exercised on the same date. (F6) This transaction was executed in multiple trades at prices ranging from $89.560 to $89.960. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. |
| 7 | Derivative | Employee Stock Option (Right to Buy) | 2026-08-25 | M | D | 153,676 | $0.00 | 68,476 | D | $43.00 · 2026-08-17 to 2027-08-17 | 153,676 Common Stock | (F1) Represents the exercise of a stock option award scheduled to expire on August 17, 2027. |
| 8 | Derivative | Employee Stock Option (Right to Buy) | 2026-08-26 | M | D | 68,476 | $0.00 | 0 | D | $43.00 · 2026-08-17 to 2027-08-17 | 68,476 Common Stock | (F1) Represents the exercise of a stock option award scheduled to expire on August 17, 2027. |