NOC
insider transactionsNORTHROP GRUMMAN CORP /DE/ — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 365d
-38.5K
0 buy · 38.5K sell
Net value · 365d
-$26.3M
$0 in · $26.3M out
Sentiment · 365d
Net selling
0% buying · 100% selling
Open-market trades · 365d
43
0 buy · 38.5K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Grant·A
Director
$0
4.0K sh
Own New
-
Grant·A
Director
$0
1.6K sh
Own +10%
-
Grant·A
Director
$192.7K
349 sh · $552.17
Own +28%
-
Grant·A
Director
$192.7K
349 sh · $552.17
Own +8%
-
Grant·A
Director
$192.7K
349 sh · $552.17
Own +5%
-
Grant·A
Director
$192.7K
349 sh · $552.17
Own +2%
-
Grant·A
Director
$192.7K
349 sh · $552.17
Own +3%
-
Grant·A
Director
$192.7K
349 sh · $552.17
Own +28%
-
Grant·A
Director
$192.7K
349 sh · $552.17
Own +15%
-
Grant·A
Director
$192.7K
349 sh · $552.17
Own +485%
-
Grant·A
Director
$192.7K
349 sh · $552.17
Own +3%
-
Sell·S
Director · 10b5-1
$577
1 sh · $577.05
Own -0%
-
Sell·S
Director · 10b5-1
$4.0K
7 sh · $576.38
Own -0%
-
Sell·S
Director · 10b5-1
$2.3K
4 sh · $575.59
Own -0%
-
Sell·S
Director · 10b5-1
$1.1K
2 sh · $574.51
Own -0%
-
Sell·S
Director · 10b5-1
$8.0K
14 sh · $573.51
Own -0%
-
Sell·S
Director · 10b5-1
$3.4K
6 sh · $572.72
Own -0%
-
Sell·S
Director · 10b5-1
$1.7K
3 sh · $571.74
Own -0%
-
Sell·S
Director · 10b5-1
$24.5K
43 sh · $570.47
Own -1%
-
Sell·S
Director · 10b5-1
$5.1K
9 sh · $569.49
Own -0%
-
Sell·S
Director · 10b5-1
$2.8K
5 sh · $568.75
Own -0%
-
Sell·S
Director · 10b5-1
$567
1 sh · $566.60
Own -0%
-
Grant·A
Director
—
434 sh
Own +6%
-
Grant·A
Director
$91.4K
377 sh · $242.39
Own +11%
-
Grant·A
Director
$36.2K
53 sh · $682.24
Own +2%
-
Grant·A
Director
$46.4K
68 sh · $682.24
Own +1%
-
Sell·S
Corp VP & General Counsel · 10b5-1
$650.4K
873 sh · $745.00
Own -100%
-
Sell·S
CVP & Pres. Mission Systems · 10b5-1
$1.3M
1.8K sh · $720.00
Own -43%
-
Sell·S
Corp VP & General Counsel · 10b5-1
$141.2K
194 sh · $727.62
Own -18%
-
Sell·S
CVP & Pres. Mission Systems · 10b5-1
$372.5K
512 sh · $727.62
Own -11%
-
Sell·S
Corp VP, Controller & CAO
$107.7K
147 sh · $732.98
Own -6%
-
Sell·S
CVP & Pres. Defense Systems
$1.6M
2.2K sh · $719.61
Own -94%
-
Exercise·M
Kathy J Warden KEY
Chair, CEO and President
$0
10.8K sh
Own +53%
-
Other·F
Kathy J Warden KEY
Chair, CEO and President
$3.4M
4.9K sh · $701.12
Own -2%
-
Exercise·M
Kathy J Warden KEY
Chair, CEO and President
$0
10.8K sh
Own +6%
-
Exercise·M
Corp VP & General Counsel · 10b5-1
$0
387 sh
Own +8%
-
Sell·S
Corp VP & General Counsel · 10b5-1
$547.3K
779 sh · $702.56
Own -42%
-
Other·F
Corp VP & General Counsel · 10b5-1
$135.3K
193 sh · $701.12
Own -9%
-
Exercise·M
Corp VP & General Counsel · 10b5-1
$0
387 sh
Own +23%
-
Exercise·M
CVP & Pres. Mission Systems · 10b5-1
$0
2.0K sh
Own +45%
-
Sell·S
CVP & Pres. Mission Systems · 10b5-1
$223.4K
318 sh · $702.56
Own -6%
-
Other·F
CVP & Pres. Mission Systems · 10b5-1
$695.5K
992 sh · $701.12
Own -17%
-
Exercise·M
CVP & Pres. Mission Systems · 10b5-1
$0
2.0K sh
Own +52%
-
Exercise·M
CVP & Pres Aeronautics Systems
$0
2.2K sh
Own +49%
-
Other·F
CVP & Pres Aeronautics Systems
$704.6K
1.0K sh · $701.12
Own -8%
-
Exercise·M
CVP & Pres Aeronautics Systems
$0
2.2K sh
Own +21%
-
Exercise·M
Corp VP, Controller & CAO
$0
538 sh
Own +56%
-
Sell·S
Corp VP, Controller & CAO
$501.6K
716 sh · $700.63
Own -21%
-
Other·F
Corp VP, Controller & CAO
$170.4K
243 sh · $701.12
Own -7%
-
Exercise·M
Corp VP, Controller & CAO
$0
538 sh
Own +17%
-
Exercise·M
CVP and Pres. Space Systems
$0
264 sh
Own +4%
-
Other·F
CVP and Pres. Space Systems
$59.6K
85 sh · $701.12
Own -3%
-
Exercise·M
CVP and Pres. Space Systems
$0
264 sh
Own +11%
-
Exercise·M
CVP & Pres. Defense Systems
$0
274 sh
Own +4%
-
Other·F
CVP & Pres. Defense Systems
$86.2K
123 sh · $701.12
Own -5%
-
Exercise·M
CVP & Pres. Defense Systems
$0
274 sh
Own +13%
-
Sell·S
Corp VP, Controller & CAO
$408
1 sh · $703.21
Own -0%
-
Sell·S
Corp VP, Controller & CAO
$550.0K
783 sh · $702.43
Own -20%
-
Grant·A
Director
$49.3K
71 sh · $695.06
Own New
-
Exercise·M
Corp VP & General Counsel
$0
1.3K sh
Own +13%
-
Grant·A
Corp VP & General Counsel
$0
1.5K sh
Own +36%
-
Grant·A
Corp VP & General Counsel
$0
3.6K sh
Own +40%
-
Other·F
Corp VP & General Counsel
$312.9K
461 sh · $678.83
Own -22%
-
Exercise·M
Corp VP & General Counsel
$0
1.3K sh
Own +171%
-
Exercise·M
Kathy J Warden KEY
Chair, CEO and President
$0
34.5K sh
Own +105%
-
Grant·A
Kathy J Warden KEY
Chair, CEO and President
$0
8.1K sh
Own +24%
-
Grant·A
Kathy J Warden KEY
Chair, CEO and President
$0
28.8K sh
Own +39%
-
Other·F
Kathy J Warden KEY
Chair, CEO and President
$10.4M
15.4K sh · $678.83
Own -7%
-
Exercise·M
Kathy J Warden KEY
Chair, CEO and President
$0
34.5K sh
Own +20%
-
Exercise·M
CVP & Pres. Mission Systems
$0
6.5K sh
Own +84%
-
Grant·A
CVP & Pres. Mission Systems
$0
1.7K sh
Own +25%
-
Grant·A
CVP & Pres. Mission Systems
$0
5.8K sh
Own +39%
-
Other·F
CVP & Pres. Mission Systems
$2.0M
3.0K sh · $678.83
Own -43%
-
Exercise·M
CVP & Pres. Mission Systems
$0
6.5K sh
Own +1603%
-
Exercise·M
CVP & Pres Aeronautics Systems
$0
6.9K sh
Own +95%
-
Grant·A
CVP & Pres Aeronautics Systems
$0
1.7K sh
Own +24%
-
Grant·A
CVP & Pres Aeronautics Systems
$0
5.9K sh
Own +39%
-
Other·F
CVP & Pres Aeronautics Systems
$2.1M
3.1K sh · $678.83
Own -23%
-
Exercise·M
CVP & Pres Aeronautics Systems
$0
6.9K sh
Own +111%
-
Exercise·M
Corp VP, Controller & CAO
$0
1.7K sh
Own +113%
-
Grant·A
Corp VP, Controller & CAO
$0
379 sh
Own +23%
-
Grant·A
Corp VP, Controller & CAO
$0
1.4K sh
Own +38%
-
Other·F
Corp VP, Controller & CAO
$384.2K
566 sh · $678.83
Own -13%
-
Exercise·M
Corp VP, Controller & CAO
$0
1.7K sh
Own +64%
-
Grant·A
John Greene KEY
CVP & Chief Financial Officer
$0
5.4K sh
Own New
-
Grant·A
John Greene KEY
CVP & Chief Financial Officer
$0
5.0K sh
Own New
-
Exercise·M
CVP and Pres. Space Systems
$0
913 sh
Own +7%
-
Grant·A
CVP and Pres. Space Systems
$0
1.7K sh
Own +34%
-
Grant·A
CVP and Pres. Space Systems
$0
4.0K sh
Own +36%
-
Other·F
CVP and Pres. Space Systems
$203.6K
300 sh · $678.83
Own -11%
-
Exercise·M
CVP and Pres. Space Systems
$0
913 sh
Own +50%
-
Exercise·M
CVP & Pres. Defense Systems
$0
3.2K sh
Own +33%
-
Grant·A
CVP & Pres. Defense Systems
$0
1.7K sh
Own +34%
-
Grant·A
CVP & Pres. Defense Systems
$0
4.7K sh
Own +42%
-
Other·F
CVP & Pres. Defense Systems
$824.1K
1.2K sh · $678.83
Own -36%
-
Exercise·M
CVP & Pres. Defense Systems
$0
3.2K sh
Own +1291%
-
Sell·S
Kathy J Warden KEY
Chair, CEO and President
$928.7K
1.3K sh · $711.14
Own -1%
-
Sell·S
Kathy J Warden KEY
Chair, CEO and President
$2.5M
3.6K sh · $710.36
Own -2%
-
Sell·S
Kathy J Warden KEY
Chair, CEO and President
$4.1M
5.7K sh · $709.49
Own -3%
-
Sell·S
Kathy J Warden KEY
Chair, CEO and President
$1.6M
2.3K sh · $708.63
Own -1%
-
Sell·S
Kathy J Warden KEY
Chair, CEO and President
$3.3M
4.7K sh · $707.45
Own -2%
-
Sell·S
Kathy J Warden KEY
Chair, CEO and President
$1.6M
2.2K sh · $706.65
Own -1%
-
Sell·S
Kathy J Warden KEY
Chair, CEO and President
$151.0K
214 sh · $705.84
Own -0%
-
Sell·S
Director · 10b5-1
$3.4K
5 sh · $689.31
Own -0%
-
Sell·S
Director · 10b5-1
$6.9K
10 sh · $688.51
Own -0%
-
Sell·S
Director · 10b5-1
$5.5K
8 sh · $687.64
Own -0%
-
Sell·S
Director · 10b5-1
$7.6K
11 sh · $686.43
Own -0%
-
Sell·S
Director · 10b5-1
$6.9K
10 sh · $685.33
Own -0%
-
Sell·S
Director · 10b5-1
$4.8K
7 sh · $684.67
Own -0%
-
Sell·S
Director · 10b5-1
$4.1K
6 sh · $683.79
Own -0%
-
Sell·S
Director · 10b5-1
$15.0K
22 sh · $682.47
Own -1%
-
Sell·S
Director · 10b5-1
$5.5K
8 sh · $681.68
Own -0%
-
Sell·S
Director · 10b5-1
$2.7K
4 sh · $680.49
Own -0%
-
Sell·S
Director · 10b5-1
$1.4K
2 sh · $677.43
Own -0%
-
Sell·S
Director · 10b5-1
$1.4K
2 sh · $676.14
Own -0%
-
Sell·S
Kathy J Warden KEY
Chair, CEO and President · 10b5-1
$1.8M
3.0K sh · $615.00
Own -2%
-
Sell·S
Kathy J Warden KEY
Chair, CEO and President · 10b5-1
$4.2M
7.0K sh · $600.00
Own -3%
-
Grant·A
Director
—
394 sh
Own +6%
-
Grant·A
Director
$91.5K
309 sh · $296.21
Own +10%
-
Grant·A
Director
$36.5K
64 sh · $570.21
Own +3%
-
Grant·A
Director
$46.2K
81 sh · $570.21
Own +1%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| May 26, 2026 | Marianne Catherine Brown | Grant A | 4.0K | $0 |
| May 26, 2026 | Marianne Catherine Brown | Grant A | 1.6K | $0 |
| May 20, 2026 | Mary A Winston | Grant A | 349 | $192.7K |
| May 20, 2026 | Mark A Welsh III | Grant A | 349 | $192.7K |
| May 20, 2026 | James S Turley | Grant A | 349 | $192.7K |
| May 20, 2026 | Thomas M Schoewe | Grant A | 349 | $192.7K |
| May 20, 2026 | Gary Roughead | Grant A | 349 | $192.7K |
| May 20, 2026 | Kimberly A. Ross | Grant A | 349 | $192.7K |
| May 20, 2026 | Arvind Krishna | Grant A | 349 | $192.7K |
| May 20, 2026 | Christopher W. Grady | Grant A | 349 | $192.7K |
| May 20, 2026 | Marianne Catherine Brown | Grant A | 349 | $192.7K |
| May 4, 2026 | Mark A Welsh III 10b5-1 | Sell S | 1 | $577 |
| May 4, 2026 | Mark A Welsh III 10b5-1 | Sell S | 7 | $4.0K |
| May 4, 2026 | Mark A Welsh III 10b5-1 | Sell S | 4 | $2.3K |
| May 4, 2026 | Mark A Welsh III 10b5-1 | Sell S | 2 | $1.1K |
| May 4, 2026 | Mark A Welsh III 10b5-1 | Sell S | 14 | $8.0K |
| May 4, 2026 | Mark A Welsh III 10b5-1 | Sell S | 6 | $3.4K |
| May 4, 2026 | Mark A Welsh III 10b5-1 | Sell S | 3 | $1.7K |
| May 4, 2026 | Mark A Welsh III 10b5-1 | Sell S | 43 | $24.5K |
| May 4, 2026 | Mark A Welsh III 10b5-1 | Sell S | 9 | $5.1K |
| May 4, 2026 | Mark A Welsh III 10b5-1 | Sell S | 5 | $2.8K |
| May 4, 2026 | Mark A Welsh III 10b5-1 | Sell S | 1 | $567 |
| Apr 1, 2026 | Marianne Catherine Brown | Grant A | 434 | — |
| Mar 31, 2026 | Marianne Catherine Brown | Grant A | 377 | $91.4K |
| Mar 31, 2026 | Arvind Krishna | Grant A | 53 | $36.2K |
| Mar 31, 2026 | Marianne Catherine Brown | Grant A | 68 | $46.4K |
| Mar 2, 2026 | Kathryn G Simpson 10b5-1 | Sell S | 873 | $650.4K |
| Feb 27, 2026 | Roshan S Roeder 10b5-1 | Sell S | 1.8K | $1.3M |
| Feb 19, 2026 | Kathryn G Simpson 10b5-1 | Sell S | 194 | $141.2K |
| Feb 19, 2026 | Roshan S Roeder 10b5-1 | Sell S | 512 | $372.5K |
| Feb 19, 2026 | Michael A Hardesty | Sell S | 147 | $107.7K |
| Feb 18, 2026 | Benjamin R. Davies | Sell S | 2.2K | $1.6M |
| Feb 17, 2026 | Kathy J Warden KEY | Exercise M | 10.8K | $0 |
| Feb 17, 2026 | Kathy J Warden KEY | Other F | 4.9K | $3.4M |
| Feb 17, 2026 | Kathy J Warden KEY | Exercise M | 10.8K | $0 |
| Feb 17, 2026 | Kathryn G Simpson 10b5-1 | Exercise M | 387 | $0 |
| Feb 17, 2026 | Kathryn G Simpson 10b5-1 | Sell S | 779 | $547.3K |
| Feb 17, 2026 | Kathryn G Simpson 10b5-1 | Other F | 193 | $135.3K |
| Feb 17, 2026 | Kathryn G Simpson 10b5-1 | Exercise M | 387 | $0 |
| Feb 17, 2026 | Roshan S Roeder 10b5-1 | Exercise M | 2.0K | $0 |
| Feb 17, 2026 | Roshan S Roeder 10b5-1 | Sell S | 318 | $223.4K |
| Feb 17, 2026 | Roshan S Roeder 10b5-1 | Other F | 992 | $695.5K |
| Feb 17, 2026 | Roshan S Roeder 10b5-1 | Exercise M | 2.0K | $0 |
| Feb 17, 2026 | Thomas H Jones | Exercise M | 2.2K | $0 |
| Feb 17, 2026 | Thomas H Jones | Other F | 1.0K | $704.6K |
| Feb 17, 2026 | Thomas H Jones | Exercise M | 2.2K | $0 |
| Feb 17, 2026 | Michael A Hardesty | Exercise M | 538 | $0 |
| Feb 17, 2026 | Michael A Hardesty | Sell S | 716 | $501.6K |
| Feb 17, 2026 | Michael A Hardesty | Other F | 243 | $170.4K |
| Feb 17, 2026 | Michael A Hardesty | Exercise M | 538 | $0 |
| Feb 17, 2026 | Robert J. Fleming | Exercise M | 264 | $0 |
| Feb 17, 2026 | Robert J. Fleming | Other F | 85 | $59.6K |
| Feb 17, 2026 | Robert J. Fleming | Exercise M | 264 | $0 |
| Feb 17, 2026 | Benjamin R. Davies | Exercise M | 274 | $0 |
| Feb 17, 2026 | Benjamin R. Davies | Other F | 123 | $86.2K |
| Feb 17, 2026 | Benjamin R. Davies | Exercise M | 274 | $0 |
| Feb 13, 2026 | Michael A Hardesty | Sell S | 1 | $408 |
| Feb 13, 2026 | Michael A Hardesty | Sell S | 783 | $550.0K |
| Feb 12, 2026 | Christopher W. Grady | Grant A | 71 | $49.3K |
| Feb 11, 2026 | Kathryn G Simpson | Exercise M | 1.3K | $0 |
| Feb 11, 2026 | Kathryn G Simpson | Grant A | 1.5K | $0 |
| Feb 11, 2026 | Kathryn G Simpson | Grant A | 3.6K | $0 |
| Feb 11, 2026 | Kathryn G Simpson | Other F | 461 | $312.9K |
| Feb 11, 2026 | Kathryn G Simpson | Exercise M | 1.3K | $0 |
| Feb 11, 2026 | Kathy J Warden KEY | Exercise M | 34.5K | $0 |
| Feb 11, 2026 | Kathy J Warden KEY | Grant A | 8.1K | $0 |
| Feb 11, 2026 | Kathy J Warden KEY | Grant A | 28.8K | $0 |
| Feb 11, 2026 | Kathy J Warden KEY | Other F | 15.4K | $10.4M |
| Feb 11, 2026 | Kathy J Warden KEY | Exercise M | 34.5K | $0 |
| Feb 11, 2026 | Roshan S Roeder | Exercise M | 6.5K | $0 |
| Feb 11, 2026 | Roshan S Roeder | Grant A | 1.7K | $0 |
| Feb 11, 2026 | Roshan S Roeder | Grant A | 5.8K | $0 |
| Feb 11, 2026 | Roshan S Roeder | Other F | 3.0K | $2.0M |
| Feb 11, 2026 | Roshan S Roeder | Exercise M | 6.5K | $0 |
| Feb 11, 2026 | Thomas H Jones | Exercise M | 6.9K | $0 |
| Feb 11, 2026 | Thomas H Jones | Grant A | 1.7K | $0 |
| Feb 11, 2026 | Thomas H Jones | Grant A | 5.9K | $0 |
| Feb 11, 2026 | Thomas H Jones | Other F | 3.1K | $2.1M |
| Feb 11, 2026 | Thomas H Jones | Exercise M | 6.9K | $0 |
| Feb 11, 2026 | Michael A Hardesty | Exercise M | 1.7K | $0 |
| Feb 11, 2026 | Michael A Hardesty | Grant A | 379 | $0 |
| Feb 11, 2026 | Michael A Hardesty | Grant A | 1.4K | $0 |
| Feb 11, 2026 | Michael A Hardesty | Other F | 566 | $384.2K |
| Feb 11, 2026 | Michael A Hardesty | Exercise M | 1.7K | $0 |
| Feb 11, 2026 | John Greene KEY | Grant A | 5.4K | $0 |
| Feb 11, 2026 | John Greene KEY | Grant A | 5.0K | $0 |
| Feb 11, 2026 | Robert J. Fleming | Exercise M | 913 | $0 |
| Feb 11, 2026 | Robert J. Fleming | Grant A | 1.7K | $0 |
| Feb 11, 2026 | Robert J. Fleming | Grant A | 4.0K | $0 |
| Feb 11, 2026 | Robert J. Fleming | Other F | 300 | $203.6K |
| Feb 11, 2026 | Robert J. Fleming | Exercise M | 913 | $0 |
| Feb 11, 2026 | Benjamin R. Davies | Exercise M | 3.2K | $0 |
| Feb 11, 2026 | Benjamin R. Davies | Grant A | 1.7K | $0 |
| Feb 11, 2026 | Benjamin R. Davies | Grant A | 4.7K | $0 |
| Feb 11, 2026 | Benjamin R. Davies | Other F | 1.2K | $824.1K |
| Feb 11, 2026 | Benjamin R. Davies | Exercise M | 3.2K | $0 |
| Feb 6, 2026 | Kathy J Warden KEY | Sell S | 1.3K | $928.7K |
| Feb 6, 2026 | Kathy J Warden KEY | Sell S | 3.6K | $2.5M |
| Feb 6, 2026 | Kathy J Warden KEY | Sell S | 5.7K | $4.1M |
| Feb 6, 2026 | Kathy J Warden KEY | Sell S | 2.3K | $1.6M |
| Feb 6, 2026 | Kathy J Warden KEY | Sell S | 4.7K | $3.3M |
| Feb 6, 2026 | Kathy J Warden KEY | Sell S | 2.2K | $1.6M |
| Feb 6, 2026 | Kathy J Warden KEY | Sell S | 214 | $151.0K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 5 | $3.4K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 10 | $6.9K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 8 | $5.5K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 11 | $7.6K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 10 | $6.9K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 7 | $4.8K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 6 | $4.1K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 22 | $15.0K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 8 | $5.5K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 4 | $2.7K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 2 | $1.4K |
| Feb 2, 2026 | Mark A Welsh III 10b5-1 | Sell S | 2 | $1.4K |
| Jan 6, 2026 | Kathy J Warden KEY 10b5-1 | Sell S | 3.0K | $1.8M |
| Jan 5, 2026 | Kathy J Warden KEY 10b5-1 | Sell S | 7.0K | $4.2M |
| Jan 2, 2026 | Marianne Catherine Brown | Grant A | 394 | — |
| Dec 31, 2025 | Marianne Catherine Brown | Grant A | 309 | $91.5K |
| Dec 31, 2025 | Arvind Krishna | Grant A | 64 | $36.5K |
| Dec 31, 2025 | Marianne Catherine Brown | Grant A | 81 | $46.2K |
About NOC insider trading
This page tracks insider transactions for NORTHROP GRUMMAN CORP /DE/ (NOC) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.