SEC Insider Transactions from WELSH MARK A III.

Last updated: 2026-03-14 11:46 UTC | Total transactions: 119

Mark A. Welsh III, a director at Northrop Grumman Corp ($NOC), made 51 open market sales of company shares over the last year, totaling about $185,000. His most recent sale occurred on February 2, 2026. These NOC insider sales rank him 8,590th out of 11,678 individual insiders, well below the average sale amount of 8.6 million across about 6.4 transactions per insider. He recorded no open market purchases in this period.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 6 $683.79 4,254.0000 143,800,000 0.14% 0.00%
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 7 $684.67 4,247.0000 143,800,000 0.16% 0.00%
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 10 $685.33 4,237.0000 143,800,000 0.24% 0.00%
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 11 $686.43 4,226.0000 143,800,000 0.26% 0.00%
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 8 $687.64 4,218.0000 143,800,000 0.19% 0.00%
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 10 $688.51 4,208.0000 143,800,000 0.24% 0.00%
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 5 $689.31 4,203.0000 143,800,000 0.12% 0.00%
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $676.14 4,296.0000 143,800,000 0.05% 0.00%
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $677.43 4,294.0000 143,800,000 0.05% 0.00%
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 4 $680.49 4,290.0000 143,800,000 0.09% 0.00%
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 8 $681.68 4,282.0000 143,800,000 0.19% 0.00%
Feb. 2, 2026 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 22 $682.47 4,260.0000 143,800,000 0.51% 0.00%
Nov. 24, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $566.15 4,281.0000 144,100,000 0.02% 0.00%
Nov. 24, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 12 $565.31 4,282.0000 144,100,000 0.28% 0.00%
Nov. 24, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 61 $564.36 4,294.0000 144,100,000 1.40% 0.00%
Nov. 24, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 9 $563.62 4,355.0000 144,100,000 0.21% 0.00%
Nov. 24, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 7 $562.52 4,364.0000 144,100,000 0.16% 0.00%
Nov. 24, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 6 $561.51 4,371.0000 144,100,000 0.14% 0.00%
Nov. 24, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $560.39 4,377.0000 144,100,000 0.02% 0.00%
July 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $509.59 4,363.0000 147,300,000 0.02% 0.00%
July 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 5 $508.17 4,364.0000 147,300,000 0.11% 0.00%
July 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $507.25 4,369.0000 147,300,000 0.07% 0.00%
July 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 21 $506.36 4,372.0000 147,300,000 0.48% 0.00%
July 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $505.44 4,393.0000 147,300,000 0.05% 0.00%
July 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $503.59 4,395.0000 147,300,000 0.02% 0.00%
June 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 6 $487.37 4,399.0000 147,300,000 0.14% 0.00%
June 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $486.43 4,405.0000 147,300,000 0.07% 0.00%
June 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $485.67 4,408.0000 147,300,000 0.02% 0.00%
June 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $491.07 4,376.0000 147,300,000 0.02% 0.00%
June 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $490.13 4,377.0000 147,300,000 0.07% 0.00%
June 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $489.26 4,380.0000 147,300,000 0.07% 0.00%
June 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 16 $488.88 4,383.0000 147,300,000 0.36% 0.00%
May 21, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director A Common Stock 385 $473.90 4,409.0000 147,300,000 9.57% 0.00%
May 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $489.64 4,056.0000 147,300,000 0.02% 0.00%
May 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $490.28 4,055.0000 147,300,000 0.02% 0.00%
May 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $491.47 4,052.0000 147,300,000 0.07% 0.00%
May 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $492.79 4,050.0000 147,300,000 0.05% 0.00%
May 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 10 $493.60 4,040.0000 147,300,000 0.25% 0.00%
May 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 13 $494.64 4,027.0000 147,300,000 0.32% 0.00%
May 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $495.53 4,024.0000 147,300,000 0.07% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $481.51 4,067.0000 147,300,000 0.05% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $482.69 4,065.0000 147,300,000 0.05% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 6 $483.42 4,059.0000 147,300,000 0.15% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $484.55 4,058.0000 147,300,000 0.02% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $492.12 4,057.0000 147,300,000 0.02% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $474.60 4,089.0000 147,300,000 0.02% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $475.46 4,088.0000 147,300,000 0.02% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 5 $476.28 4,083.0000 147,300,000 0.12% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $477.49 4,081.0000 147,300,000 0.05% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 4 $478.51 4,077.0000 147,300,000 0.10% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $479.93 4,076.0000 147,300,000 0.02% 0.00%
April 7, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 7 $480.56 4,069.0000 147,300,000 0.17% 0.00%
March 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 4 $476.38 4,076.0000 147,300,000 0.10% 0.00%
March 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $477.39 4,074.0000 147,300,000 0.05% 0.00%
March 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $479.50 4,073.0000 147,300,000 0.02% 0.00%
March 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $467.74 4,104.0000 147,300,000 0.05% 0.00%
March 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $468.10 4,101.0000 147,300,000 0.07% 0.00%
March 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $469.54 4,100.0000 147,300,000 0.02% 0.00%
March 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $470.90 4,098.0000 147,300,000 0.05% 0.00%
March 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $471.21 4,095.0000 147,300,000 0.07% 0.00%
March 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $473.50 4,094.0000 147,300,000 0.02% 0.00%
March 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 14 $475.19 4,080.0000 147,300,000 0.34% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $480.06 4,122.0000 147,300,000 0.02% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $474.83 4,136.0000 147,300,000 0.07% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $475.66 4,133.0000 147,300,000 0.07% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $476.40 4,130.0000 147,300,000 0.07% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $477.50 4,128.0000 147,300,000 0.05% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $478.33 4,125.0000 147,300,000 0.07% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $479.55 4,123.0000 147,300,000 0.05% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $481.34 4,120.0000 147,300,000 0.05% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 4 $482.21 4,116.0000 147,300,000 0.10% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 4 $483.48 4,112.0000 147,300,000 0.10% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 5 $484.37 4,107.0000 147,300,000 0.12% 0.00%
Feb. 5, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $485.43 4,106.0000 147,300,000 0.02% 0.00%
Jan. 6, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 14 $454.26 4,158.0000 147,300,000 0.34% 0.00%
Jan. 6, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $463.99 4,139.0000 147,300,000 0.02% 0.00%
Jan. 6, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $460.21 4,140.0000 147,300,000 0.05% 0.00%
Jan. 6, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 4 $459.34 4,142.0000 147,300,000 0.10% 0.00%
Jan. 6, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 5 $458.60 4,146.0000 147,300,000 0.12% 0.00%
Jan. 6, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $457.54 4,151.0000 147,300,000 0.07% 0.00%
Jan. 6, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $456.65 4,154.0000 147,300,000 0.07% 0.00%
Jan. 6, 2025 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $455.31 4,157.0000 147,300,000 0.02% 0.00%
Dec. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $482.70 4,158.0000 147,800,000 0.05% 0.00%
Dec. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $478.59 4,187.0000 147,800,000 0.02% 0.00%
Dec. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 4 $479.56 4,183.0000 147,800,000 0.10% 0.00%
Dec. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 5 $480.54 4,178.0000 147,800,000 0.12% 0.00%
Dec. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 18 $481.67 4,160.0000 147,800,000 0.43% 0.00%
Dec. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $483.62 4,155.0000 147,800,000 0.07% 0.00%
Nov. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 9 $509.57 4,203.0000 147,800,000 0.21% 0.00%
Nov. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $506.62 4,219.0000 147,800,000 0.02% 0.00%
Nov. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $505.94 4,220.0000 147,800,000 0.02% 0.00%
Nov. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $510.27 4,202.0000 147,800,000 0.02% 0.00%
Nov. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 7 $512.04 4,188.0000 147,800,000 0.17% 0.00%
Nov. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 7 $511.84 4,195.0000 147,800,000 0.17% 0.00%
Nov. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $507.48 4,216.0000 147,800,000 0.07% 0.00%
Nov. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 4 $508.70 4,212.0000 147,800,000 0.09% 0.00%
Oct. 7, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 5 $534.45 4,246.0000 147,800,000 0.12% 0.00%
Oct. 7, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $532.69 4,253.0000 147,800,000 0.02% 0.00%
Oct. 7, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $533.56 4,251.0000 147,800,000 0.05% 0.00%
Oct. 7, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 5 $535.65 4,241.0000 147,800,000 0.12% 0.00%
Oct. 7, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 19 $536.18 4,222.0000 147,800,000 0.45% 0.00%
Oct. 7, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $537.15 4,221.0000 147,800,000 0.02% 0.00%
Sept. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $516.93 4,271.0000 152,000,000 0.02% 0.00%
Sept. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $525.00 4,239.0000 152,000,000 0.05% 0.00%
Sept. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $523.56 4,241.0000 152,000,000 0.02% 0.00%
Sept. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $522.45 4,242.0000 152,000,000 0.02% 0.00%
Sept. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 1 $521.47 4,243.0000 152,000,000 0.02% 0.00%
Sept. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 5 $520.60 4,244.0000 152,000,000 0.12% 0.00%
Sept. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 9 $519.59 4,249.0000 152,000,000 0.21% 0.00%
Sept. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 10 $518.42 4,258.0000 152,000,000 0.23% 0.00%
Sept. 5, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 3 $517.82 4,268.0000 152,000,000 0.07% 0.00%
Aug. 29, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 8 $518.57 4,272.0000 152,000,000 0.19% 0.00%
Aug. 29, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 5 $517.51 4,280.0000 152,000,000 0.12% 0.00%
Aug. 29, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 8 $516.77 4,285.0000 152,000,000 0.19% 0.00%
Aug. 29, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 9 $513.36 4,295.0000 152,000,000 0.21% 0.00%
Aug. 29, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $512.22 4,304.0000 152,000,000 0.05% 0.00%
Aug. 29, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director S Common Stock 2 $515.50 4,293.0000 152,000,000 0.05% 0.00%
July 31, 2024 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director A Common Stock 377 $484.32 4,306.0000 152,000,000 9.60% 0.00%
May 17, 2023 NORTHROP GRUMMAN CORP /DE/ $NOC WELSH MARK A III Director A Common Stock 392 $447.34 3,849.0000 155,600,000 11.34% 0.00%