Key facts
- This page summarizes William L. Ballhaus's Form 4 filing for MERCURY SYSTEMS INC (MRCY).
- 8 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 27 Aug 2026, 16:54.
William L. Ballhaus - 25 Aug 2026 Form 4 Insider Report for MERCURY SYSTEMS INC (MRCY)
- Reporting relationship
- Chairman, President & CEO, Director
- Issuer ticker
- MRCY
- Reported as of
- 25 Aug 2026
- Net transaction value
- -$14,050,340
- SEC form
- 4
- Accepted by SEC
- 27 Aug 2026, 16:54:31 UTC
- Prior SEC filing
- 25 Aug 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Douglas Munro, attorney-in-fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
William L. Ballhaus filed Form 4 for MERCURY SYSTEMS INC (MRCY) on 27 Aug 2026.
Change
- Previous filing in this sequence was filed on 25 Aug 2026.
- Current net transaction value: -$14,050,340.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001436044
Primary reporting owner
Ballhaus William L
- Relationship
- Chairman, President & CEO, Director
- Address
- 50 MINUTEMAN ROAD, ANDOVER
- Signature
- /s/ Douglas Munro, attorney-in-fact
- Signature date
- 27 Aug 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
MRCY
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +153,676
- Change %
- +51%
- Price
- $43.00*
- Shares after
- 453,512
- Date
- 25 Aug 2026
- Ownership
- Direct
- Footnotes
- F1
MRCY
transaction
Common Stock
Sale
- Transaction value
- $9,373,215
- Shares
- -107,628
- Change %
- -24%
- Price
- $87.09
- Shares after
- 345,884
- Date
- 25 Aug 2026
- Ownership
- Direct
- Footnotes
- F2, F3
MRCY
transaction
Common Stock
Sale
- Transaction value
- $303,400
- Shares
- -3,448
- Change %
- -1%
- Price
- $87.99
- Shares after
- 342,436
- Date
- 25 Aug 2026
- Ownership
- Direct
- Footnotes
- F2, F4
MRCY
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +68,476
- Change %
- +20%
- Price
- $43.00*
- Shares after
- 410,912
- Date
- 26 Aug 2026
- Ownership
- Direct
- Footnotes
- F1
MRCY
transaction
Common Stock
Sale
- Transaction value
- $3,403,234
- Shares
- -38,276
- Change %
- -9.3%
- Price
- $88.91
- Shares after
- 372,636
- Date
- 26 Aug 2026
- Ownership
- Direct
- Footnotes
- F2, F5
MRCY
transaction
Common Stock
Sale
- Transaction value
- $970,492
- Shares
- -10,814
- Change %
- -2.9%
- Price
- $89.74
- Shares after
- 361,822
- Date
- 26 Aug 2026
- Ownership
- Direct
- Footnotes
- F2, F6
MRCY
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,403
- Date
- 25 Aug 2026
- Ownership
- 401K Plan
MRCY
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 7,066
- Date
- 25 Aug 2026
- Ownership
- By Milestone Road Holdings, LLC
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
MRCY
transaction
Derivative
Employee Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -153,676
- Change %
- -69%
- Price
- $0.000000*
- Shares after
- 68,476
- Date
- 25 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 153,676
- Exercise price
- $43.00
- Footnotes
- F1
MRCY
transaction
Derivative
Employee Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -68,476
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 26 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 68,476
- Exercise price
- $43.00
- Footnotes
- F1
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 6 footnotes
Footnote F1
Represents the exercise of a stock option award scheduled to expire on August 17, 2027.
Footnote 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.
Footnote 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.
Footnote 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.
Footnote 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.
Footnote 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.