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Munro Douglas

Disclosed activity across 1 company

Tapewire entity
20983
SEC CIK
0002011703

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
MERCURY SYSTEMS INCMRCY · Entity 3908SVP, CAOAugust 17, 2026September 15, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

MERCURY SYSTEMS INC

Report date August 17, 2026 · Filed September 15, 2026 · Amendment

Amendment: balances below belong to this corrected disclosure, not necessarily a complete replacement of earlier positions.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect17,015 Reported balance After 2026-08-17 transaction · row 1 Amendment: may correct only part of an earlier disclosure.
1 source row

Row 1 · 2026-08-17 · Grant · Acquired 2,882 · Balance 17,015

F1: Represents restricted stock units that vest in equal annual increments over the three-year period following the grant date.

Common StockSEC Table I · non-derivativeIndirect401K Plan359 Reported balance Holding disclosure · report date 2026-08-17 · row 2 Amendment: may correct only part of an earlier disclosure.
1 source row

Row 2 · Balance 359

Filing footnotes · ownership attribution and instrument terms

F1: Represents restricted stock units that vest in equal annual increments over the three-year period following the grant date.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
August 20, 2026 Filed Aug 21, 2026 20:52 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 109 $97.67 $10,646.40
Disclosure

SEC source: 0001049521-26-000059 · form4.xml · nonDerivative · entry 2

Munro Douglas · CIK 0002011703 · SVP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,982

F1 · shares: Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

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August 19, 2026 Filed Aug 21, 2026 20:52 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 548 $100.31 $54,967.69
Disclosure

SEC source: 0001049521-26-000059 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · SVP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,091

F1 · shares: Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Read SEC document
August 18, 2026 Filed Aug 19, 2026 22:31 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 494 $111.36 $55,010.70
Disclosure

SEC source: 0001049521-26-000054 · form4.xml · nonDerivative · entry 2

Munro Douglas · CIK 0002011703 · SVP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,639

F1 · shares: Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Read SEC document
August 17, 2026 Filed Sep 15, 2026 22:10 UTC Amendment MERCURY SYSTEMS INC MRCY · Entity 3908 GrantCommon Stock 2,882 $0.00 $0.00
Disclosure

SEC source: 0001049521-26-000071 · form4a.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · SVP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,015

F1 · shares: Represents restricted stock units that vest in equal annual increments over the three-year period following the grant date.

Read SEC document
August 17, 2026 Filed Aug 19, 2026 22:31 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 404 $109.95 $44,420.16
Disclosure

SEC source: 0001049521-26-000054 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · SVP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,133

F1 · shares: Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Read SEC document
February 17, 2026 Filed Feb 19, 2026 21:37 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 582 $83.56 $48,629.24
Disclosure

SEC source: 0001049521-26-000008 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · SVP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,328

F1 · shares: Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Read SEC document
November 12, 2025 Filed Nov 13, 2025 22:10 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 1,329 $73.42 $97,569.73
Disclosure

SEC source: 0001049521-25-000072 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · SVP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,678

F1 · price: This transaction was executed in multiple trades at prices ranging from $73.415 to $73.424. The price reported above reflects the weighted average 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.

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September 16, 2025 Filed Sep 17, 2025 21:43 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 67 $73.40 $4,918.08
Disclosure

SEC source: 0001049521-25-000038 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,007

F1 · shares: Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Read SEC document
August 19, 2025 Filed Aug 20, 2025 21:16 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 376 $64.46 $24,238.46
Disclosure

SEC source: 0001127602-25-020798 · form4.xml · nonDerivative · entry 2

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,074

F1 · shares: Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Read SEC document
August 18, 2025 Filed Aug 20, 2025 21:16 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 363 $66.52 $24,145.42
Disclosure

SEC source: 0001127602-25-020798 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,450

F1 · shares: Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 21:50 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 GrantCommon Stock 3,380 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-020734 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,813

F1 · shares: Represents restricted stock units that vest in equal annual increments over the three-year period following the grant date.

Read SEC document
May 14, 2025 Filed May 16, 2025 20:21 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 809 $44.88 $36,307.92
Disclosure

SEC source: 0001127602-25-014693 · form4.xml · nonDerivative · entry 2

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Indirect · 401K Plan

Disclosed balance after: 0

Read SEC document
May 14, 2025 Filed May 16, 2025 20:21 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 1,610 $45.64 $73,480.40
Disclosure

SEC source: 0001127602-25-014693 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,433

Read SEC document
February 18, 2025 Filed Feb 19, 2025 21:56 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 595 $44.12 $26,253.78
Disclosure

SEC source: 0001127602-25-005553 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,572

F1 · shares: Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

F3 · balance_after: Reflects a reduction of 125 excess shares that were re-acquired by the Company at fair market value to correct the number of shares issued to the reporting person under the Company's employee stock purchase plan.

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September 16, 2024 Filed Sep 19, 2024 00:05 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 69 $37.60 $2,594.23
Disclosure

SEC source: 0001127602-24-024188 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,292

F1 · shares: Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Read SEC document
August 19, 2024 Filed Aug 22, 2024 00:59 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 345 $39.49 $13,622.36
Disclosure

SEC source: 0001127602-24-022748 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,361

F1 · shares: Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Read SEC document
August 15, 2024 Filed Aug 19, 2024 22:01 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 GrantCommon Stock 5,364 $0.00 $0.00
Disclosure

SEC source: 0001127602-24-022528 · form4.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,706

F1 · shares: Represents restricted stock units that vest in equal annual increments over the four-year period following the grant date.

Read SEC document
August 15, 2024 Filed Sep 19, 2024 00:03 UTC Amendment MERCURY SYSTEMS INC MRCY · Entity 3908 GrantCommon Stock 5,364 $0.00 $0.00
Disclosure

SEC source: 0001127602-24-024187 · form4a.xml · nonDerivative · entry 1

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,706

F1 · shares: Represents restricted stock units that vest in equal annual increments over the four-year period following the grant date.

Read SEC document
February 16, 2024 Filed Feb 20, 2024 22:33 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 SaleCommon Stock 276 $29.57 $8,161.87
Disclosure

SEC source: 0001127602-24-005832 · form4.xml · nonDerivative · entry 3

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,107

F2 · price: Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Read SEC document
February 15, 2024 Filed Feb 20, 2024 22:33 UTC MERCURY SYSTEMS INC MRCY · Entity 3908 GrantCommon Stock 3,304 $0.00 $0.00
Disclosure

SEC source: 0001127602-24-005832 · form4.xml · nonDerivative · entry 2

Munro Douglas · CIK 0002011703 · VP, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,383

F1 · shares: These shares of restricted stock vest in equal annual increments over the four-year period following the grant date.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.