Marianne Catherine Brown

Sits on 4 boards. Last updated September 28, 2026

Time on boards

Boards served
4
Current seats
4
Board service
14 years
Director since
2023

14 years of board service in total across 4 boards, counting each seat separately. Longest: Northrop Grumman Corporation, 3 years.

3 years ยท Since 2023
3 years ยท Since 2023
3 years ยท Since 2023
2 years ยท Since 2023

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Date Company Transaction Shares Price Value
Jun 30, 2026 Northrop Grumman Corporation Grant or award +91 $509.31 $46,347
May 26, 2026 The Charles Schwab Corporation Grant or award +1,602 โ€” โ€”
May 20, 2026 Northrop Grumman Corporation Grant or award +349 $552.17 $192,707
Mar 31, 2026 Northrop Grumman Corporation Grant or award +68 $682.24 $46,392
Dec 31, 2025 Northrop Grumman Corporation Grant or award +81 $570.21 $46,187
Sep 30, 2025 Northrop Grumman Corporation Grant or award +76 $609.32 $46,308
Jun 30, 2025 Northrop Grumman Corporation Grant or award +93 $499.98 $46,498
May 27, 2025 The Charles Schwab Corporation Grant or award +1,462 โ€” โ€”
May 21, 2025 Northrop Grumman Corporation Grant or award +385 $473.90 $182,452
Mar 31, 2025 Northrop Grumman Corporation Grant or award +90 $512.01 $46,081
Dec 31, 2024 Northrop Grumman Corporation Grant or award +99 $469.29 $46,460
Sep 30, 2024 Northrop Grumman Corporation Grant or award +88 $528.07 $46,470
Jul 31, 2024 Northrop Grumman Corporation Grant or award +377 $484.32 $182,589
Jul 31, 2024 Northrop Grumman Corporation Grant or award +94 $484.32 $45,526
May 28, 2024 The Charles Schwab Corporation Grant or award +1,809 โ€” โ€”

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