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NOCNorthrop Grumman · Insider ownership research

Northrop Grumman insiders sold $26.4M in the past 12 months. How much of their stake is that?

About 10% overall. As a group they ended with more shares than they started with.

Updated Oct 9, 2026 from SEC filings · covers Oct 10, 2025 to Oct 9, 2026
How this comparesMore of their stake sold than at 341 of the 490 other companies we can measure (#150 of 491)See ranking
0
buyers among officers and directors, past 12 months
36%
of sales were under disclosed trading plans, past 12 months
6 of 20
officers and directors sold shares, past 12 months
Recent activity · past 30 days, Sep 10, 2026 to Oct 9, 2026

No officer or director trades were reported for the past 30 days. The most recent before that:

Aug 3, 2026Mark Welsh III sold 95 shares ($52K) under a disclosed trading plan. That is 2.1% of the total stake held that day.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Mark Welsh III
Director
95$547.532.1%4.3KAug 3, 2026Aug 4, 2026

"% of total stake" is the shares in this event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings don't reconcile, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Is this normal? In line with the past 5 years. 6 insiders sold; the average is 8 a year. Year by year
Latest filing: Filed Oct 1 for a stock award on Sep 30. Marianne Brown received an award of 96 shares. Filing
51 SEC ownership filings in the period · See the evidence

What stands out

Three officers sold $16.9M with no disclosed plan: Kathy Warden ($14.2M, 9.9% of holdings), Benjamin Davies ($1.6M) and Michael Hardesty ($1.2M). The filings don't state a reason.Kathy Warden: largest such sale, Feb 6, 2026 · Benjamin Davies: largest such sale, Feb 18, 2026 · Michael Hardesty: largest such sale, Feb 13, 2026
Mark Welsh III sold 382 shares (8.8% of starting holdings), but 412 more vested, so the stake grew (from 4.4K to 4.4K).Largest sale, Nov 24, 2025

Percentages cover 13 of 20 officers and directors. 7 are left out

i
Left out: Michael Hardesty, Kathryn Simpson, Roshan Roeder and Benjamin Davies (most of their shares vested during the period, so a percentage would mislead); Arvind Krishna (holdings couldn't be fully reconciled); John Greene and Christopher Grady (held no vested shares at the start).
Disclosed company stock is not an insider's whole wealth.

Who sold, and how much of their stake

Officers and directors, past 12 months. Each bar is 100% of that person's own stake; not comparable between people. The stake is the vested shares held at the start of the period (Oct 9, 2025); the gold part is what they sold.

SoldRest of starting stake
Kathy Warden
Chair, CEO and President, Director
15% · $20.2M30% planned 70% no plan disclosed
Roshan Roeder
CVP & Pres. Mission Systems
Sold $1.9M (plan status beside the amount). That is 51% of the shares held or received (after tax withholding) during the period†. A share of the starting stake is not shown: most of these shares arrived during the period. Why
$1.9MDisclosed plan
Benjamin Davies
CVP & Pres. Defense Systems
Sold $1.6M (plan status beside the amount). That is 94% of the shares held or received (after tax withholding) during the period†. A share of the starting stake is not shown: most of these shares arrived during the period. Why
$1.6MNo plan disclosed
Kathryn Simpson
Corp VP & General Counsel
Sold $1.3M (plan status beside the amount). That is 99.9% of the shares held or received (after tax withholding) during the period†. A share of the starting stake is not shown: most of these shares arrived during the period. Why
$1.3MDisclosed plan
Michael Hardesty
Corp VP, Controller & CAO
Sold $1.2M (plan status beside the amount). That is 39% of the shares held or received (after tax withholding) during the period†. A share of the starting stake is not shown: most of these shares arrived during the period. Why
$1.2MNo plan disclosed
All 6 sellers

Selling by month

Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

Disclosed planNo plan disclosedOne dollar scale for every month; the tallest bar is labeled
OctNov 2025: $55K under a disclosed planNovDec 2025: $47K under a disclosed planDecJan 2026: $6.0M under a disclosed planJanFeb 2026: $2.6M under a disclosed planFeb 2026: $16.9M no plan disclosed$19.5MFebMar 2026: $650K under a disclosed planMarAprMay 2026: $54K under a disclosed planMayJunJulAug 2026: $52K under a disclosed planAugSepOct

Common questions

Is the Northrop Grumman CEO selling stock?

Yes. Kathy Warden sold 30K shares ($20.2M, 15% of starting holdings) in the past 12 months, 30% of it under a trading plan disclosed in the filings.

Why are Northrop Grumman insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 36% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 64% had no disclosed plan. A trading plan schedules sales in advance.

Are any Northrop Grumman insiders buying?

No. Officers and directors reported no purchases in the past 12 months.

How much of their stake did Northrop Grumman insiders sell?

About 10% overall. As a group they ended with more shares than they started with. That covers the 12 months to Oct 9, 2026 and counts vested shares reported on SEC Forms 3, 4 and 5, which is not an insider's whole wealth.

The evidence

Who sold6 officers and directors: amount, % of holdings, trading plan
Who soldAmount% of holdingsTrading plan
Kathy Warden
Chair, CEO and President, Director
$20.2M
30K shares
15%30% under a disclosed plan 70% no plan disclosed
Roshan Roeder
CVP & Pres. Mission Systems
$1.9M
2.7K shares
51%†
i
† Most of the shares Roshan Roeder sold arrived during the period, so this is shares sold as a share of the 535 held at the start plus the 8.8K received, less 4.1K withheld by the company for taxes.
Disclosed plan
Benjamin Davies
CVP & Pres. Defense Systems
$1.6M
2.2K shares
94%†
i
† Most of the shares Benjamin Davies sold arrived during the period, so this is shares sold as a share of the 245 held at the start plus the 3.4K received, less 1.3K withheld by the company for taxes.
No plan disclosed
Kathryn Simpson
Corp VP & General Counsel
$1.3M
1.8K shares
99.9%†
i
† Most of the shares Kathryn Simpson sold arrived during the period, so this is shares sold as a share of the 779 held at the start plus the 1.7K received, less 654 withheld by the company for taxes.
Disclosed plan
Michael Hardesty
Corp VP, Controller & CAO
$1.2M
1.6K shares
39%†
i
† Most of the shares Michael Hardesty sold arrived during the period, so this is shares sold as a share of the 2.7K held at the start plus the 2.3K received, less 809 withheld by the company for taxes.
No plan disclosed
Mark Welsh III
Director
$226K
382 shares
8.8%Disclosed plan
The full ownership picture19 of 20 insiders fully reconciled · 19 officers and directors

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

InsiderHeld Oct 9, 2025SoldHeld Oct 9, 2026Still held
Kathy Warden
Chair, CEO and President, Director
202K−30K197K98%
Vesting, gifts, unvested awards and holding lines for Kathy Warden
+45Kshares vested or exercised
0gifted (net of own trusts)
−20Kwithheld by the company for taxes
0 → 36Kunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock201,602196,681
Madeleine Kleiner
i
Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Director
21K021Kno sales
Vesting, gifts, unvested awards and holding lines for Madeleine Kleiner
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock21,00221,002

Additional holdings last reported Sep 30, 2011, not confirmed since: 7,295 shares. Not included in any total or percentage on this page.

Thomas Schoewe
i
Minor difference of 211 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change. Exempt acquisition noted in a footnote; amount derived from the balance change. Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Director
16K017Kno sales
Vesting, gifts, unvested awards and holding lines for Thomas Schoewe
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Exempt acquisition noted in a footnote; amount derived from the balance change.
  • Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock16,17716,737

Additional holdings last reported Sep 30, 2011, not confirmed since: 253 shares. Not included in any total or percentage on this page.

Reconciliation: minor difference of 211 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Gary Roughead
i
Minor difference of 190 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change. Exempt acquisition noted in a footnote; amount derived from the balance change.
Director
12K012Kno sales
Vesting, gifts, unvested awards and holding lines for Gary Roughead
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Exempt acquisition noted in a footnote; amount derived from the balance change.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock11,67112,210

Reconciliation: minor difference of 190 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Marianne Brown
i
Minor difference of 185 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change. Exempt acquisition noted in a footnote; amount derived from the balance change.
Director
11K012Kno sales
Vesting, gifts, unvested awards and holding lines for Marianne Brown
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Exempt acquisition noted in a footnote; amount derived from the balance change.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock10,83611,706

Reconciliation: minor difference of 185 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

James Turley
i
Minor difference of 92 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change. Exempt acquisition noted in a footnote; amount derived from the balance change.
Director
6.3K06.7Kno sales
Vesting, gifts, unvested awards and holding lines for James Turley
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Exempt acquisition noted in a footnote; amount derived from the balance change.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock6,2976,738

Reconciliation: minor difference of 92 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Thomas Jones
CVP & Pres Aeronautics Systems
6.2K011Kno sales
Vesting, gifts, unvested awards and holding lines for Thomas Jones
+9.1Kshares vested or exercised
0gifted (net of own trusts)
−4.1Kwithheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock6,20711,205
Ann Fudge
Director
5.8K05.8Kno sales
Vesting, gifts, unvested awards and holding lines for Ann Fudge
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock5,7925,792
Mark Welsh III
i
Minor difference of 63 shares. Unexplained small increases, consistent with stock unit vesting or reinvested dividends. Unexplained small increases, consistent with stock unit vesting or reinvested dividends.
Director
4.4K−3824.4K+0.7%
Vesting, gifts, unvested awards and holding lines for Mark Welsh III
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Unexplained small increases, consistent with stock unit vesting or reinvested dividends.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock4,3634,393

Reconciliation: minor difference of 63 shares. Unexplained small increases, consistent with stock unit vesting or reinvested dividends.

Michael Hardesty
Corp VP, Controller & CAO
2.7K−1.6K2.5Knot meaningful
Vesting, gifts, unvested awards and holding lines for Michael Hardesty
+2.3Kshares vested or exercised
0gifted (net of own trusts)
−809withheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock2,7162,525
David Abney
i
Minor difference of 7 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change. Exempt acquisition noted in a footnote; amount derived from the balance change.
Director
2.5K02.8Kno sales
Vesting, gifts, unvested awards and holding lines for David Abney
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Exempt acquisition noted in a footnote; amount derived from the balance change.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock2,4682,824

Reconciliation: minor difference of 7 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Arvind Krishna
!
Holdings couldn't be fully reconciled. Balance changed without a matching transaction, and the footnote does not state the amount: +13 shares on Sep 30, 2026 (Direct). See the filing Sales and other transactions for Arvind Krishna are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Arvind Krishna
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end

Holdings couldn't be fully reconciled. Balance changed without a matching transaction, and the footnote does not state the amount: +13 shares on Sep 30, 2026 (Direct). The balances below are as reported, not verified totals.

Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock2,1842,837
Robert Fleming
CVP and Pres. Space Systems
1.8K02.6Kno sales
Vesting, gifts, unvested awards and holding lines for Robert Fleming
+1.2Kshares vested or exercised
0gifted (net of own trusts)
−385withheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock1,8272,619
Mary Winston
i
Minor difference of 19 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change. Exempt acquisition noted in a footnote; amount derived from the balance change.
Director
1.3K01.6Kno sales
Vesting, gifts, unvested awards and holding lines for Mary Winston
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Exempt acquisition noted in a footnote; amount derived from the balance change.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock1,2411,609
Held in IRACommon Stock99

Reconciliation: minor difference of 19 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Kimberly Ross
i
Minor difference of 21 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change. Exempt acquisition noted in a footnote; amount derived from the balance change.
Director
1.2K01.6Kno sales
Vesting, gifts, unvested awards and holding lines for Kimberly Ross
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Exempt acquisition noted in a footnote; amount derived from the balance change.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock1,2421,612

Reconciliation: minor difference of 21 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Kathryn Simpson
Corp VP & General Counsel
779−1.8K1not meaningful
Vesting, gifts, unvested awards and holding lines for Kathryn Simpson
+1.7Kshares vested or exercised
0gifted (net of own trusts)
−654withheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock7791
Roshan Roeder
i
Minor difference of 3 shares. Difference is under 0.5% of holdings.
CVP & Pres. Mission Systems
535−2.7K2.6Knot meaningful
Vesting, gifts, unvested awards and holding lines for Roshan Roeder
+8.8Kshares vested or exercised
0gifted (net of own trusts)
−4.1Kwithheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock3192,353
Held in Northrop Grumman Savings PlanCommon Stock113117
Held in Northrop Grumman Saving PlanCommon Stock100100
SpouseCommon Stock33

Reconciliation: minor difference of 3 shares. Difference is under 0.5% of holdings.

Benjamin Davies
CVP & Pres. Defense Systems
245−2.2K151not meaningful
Vesting, gifts, unvested awards and holding lines for Benjamin Davies
+3.4Kshares vested or exercised
0gifted (net of own trusts)
−1.3Kwithheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock245151
Held in Northrop Grumman Savings PlanCommon Stock00
Christopher Grady
i
Minor difference of 1 share. Footnote reports an exempt acquisition without its size; amount derived from the balance change. Exempt acquisition noted in a footnote; amount derived from the balance change. Started reporting during the period; starting holdings are from the Form 3.
Director
00421no sales
Vesting, gifts, unvested awards and holding lines for Christopher Grady
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Exempt acquisition noted in a footnote; amount derived from the balance change.
  • Started reporting during the period; starting holdings are from the Form 3.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock0421

Reconciliation: minor difference of 1 share. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

19 of 20 insiders fully reconciled: starting holdings plus reported transactions match ending holdings (9 exactly, 10 with a minor or footnoted difference). For 1 we show sales but not holdings; the ! icon on that row explains why. Percentages cover 13 of 20 officers and directors. Left out: Michael Hardesty, Kathryn Simpson, Roshan Roeder and Benjamin Davies (most of their shares vested during the period, so a percentage would mislead); Arvind Krishna (holdings couldn't be fully reconciled); John Greene and Christopher Grady (held no vested shares at the start). "Still held" compares ending with starting vested shares; a plus sign means the holding grew.

What explains the selling$26.4M of sales by plan status, purpose, seller and month

Officer and director open-market sales: $26.4M across 38,732 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

The lighter segment is sales with no plan disclosed in the filing ($16.9M), including tax-related sales outside a plan.

No plan disclosed · $16.9M

Sales with no 10b5-1 plan and no tax reference in the filing. $14.2M of it is Kathy Warden. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Kathy Warden, Feb 6, 2026

Taxes

31,596 shares ($21.6M) were withheld by the company for taxes, which isn't a market sale.

SellerShares soldProceedsUnder a disclosed planShare of totalSales dates
Kathy Warden
Chair, CEO and President, Director
30K$20.2M30%77%Jan 5, 2026 to Feb 6, 2026
Roshan Roeder
CVP & Pres. Mission Systems
2.7K$1.9M100%7%Dec 9, 2025 to Feb 27, 2026
Benjamin Davies
CVP & Pres. Defense Systems
2.2K$1.6M0%6%Feb 18, 2026 to Feb 18, 2026
Kathryn Simpson
Corp VP & General Counsel
1.8K$1.3M100%5%Feb 17, 2026 to Mar 2, 2026
Michael Hardesty
Corp VP, Controller & CAO
1.6K$1.2M0%4%Feb 13, 2026 to Feb 19, 2026
Mark Welsh III
Director
382$226K100%0.9%Nov 24, 2025 to Aug 3, 2026

Sales by month

MonthSale proceedsDisclosed planTo cover taxesNo plan disclosed
Oct 2025$0$0$0$0
Nov 2025$55K$55K$0$0
Dec 2025$47K$47K$0$0
Jan 2026$6.0M$6.0M$0$0
Feb 2026$19.5M$2.6M$0$16.9M
Mar 2026$650K$650K$0$0
Apr 2026$0$0$0$0
May 2026$54K$54K$0$0
Jun 2026$0$0$0$0
Jul 2026$0$0$0$0
Aug 2026$52K$52K$0$0
Sep 2026$0$0$0$0
Oct 2026$0$0$0$0
Is this normal? Selling year by year5 earlier years to compare with

In line with the past 5 years. 6 insiders sold; the average is 8 a year.

12 months endingShares soldInsiders who soldProceeds
Oct 9, 2026
Latest 12 months
39K6$26.4M
Oct 9, 2025
1 year earlier
28K8$13.7M
Oct 9, 2024
2 years earlier
14K6$6.6M
Oct 10, 2023
3 years earlier
19K8$8.9M
Oct 10, 2022
4 years earlier
34K9$15.0M
Oct 10, 2021
5 years earlier
42K11$13.8M

Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.

Known gaps and uncertainty1 insider whose holdings couldn't be fully reconciled

Arvind Krishna: holdings couldn't be fully reconciled (difference of 41 shares). Balance changed without a matching transaction, and the footnote does not state the amount: +13 shares on Sep 30, 2026 (Direct). Filing, Sep 30, 2026

Footnote: "Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3. | Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11."

Thomas Schoewe: minor difference of 211 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Gary Roughead: minor difference of 190 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Marianne Brown: minor difference of 185 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

James Turley: minor difference of 92 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Mark Welsh III: minor difference of 63 shares. Unexplained small increases, consistent with stock unit vesting or reinvested dividends.

David Abney: minor difference of 7 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Mary Winston: minor difference of 19 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Kimberly Ross: minor difference of 21 shares. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Roshan Roeder: minor difference of 3 shares. Difference is under 0.5% of holdings.

Christopher Grady: minor difference of 1 share. Footnote reports an exempt acquisition without its size; amount derived from the balance change.

Inferred rename: "Trustee: Peters Family Trust" is treated as the same holder as "Held in the Peters Family Trust", because the old name was never reported again and the new one opened with the same balance (12,475 shares). Old name, new name

Inferred rename: "Trustee: The Coleman FamilyTrust" is treated as the same holder as "Trustee: The Coleman Family Trust", because the old name was never reported again and the new one opened with the same balance (2,746 shares). Old name, new name

Inferred rename: "Trustee: WG&NF Bush FamilyTrust" is treated as the same holder as "Trustee: WG&NF Bush Family Trust", because the old name was never reported again and the new one opened with the same balance (7,711 shares). Old name, new name

Inferred rename: "Trustee: WG&NF Bush Family Trust" is treated as the same holder as "Held in WG&NF Bush Family Trust", because the old name was never reported again and the new one opened with the same balance (212,733 shares). Old name, new name

Inferred rename: "Trustee: Linda Anne Mills Living Trust U/A 3/27/00" is treated as the same holder as "Linda Anne Mills Living Trust", because the old name was never reported again and the new one opened with the same balance (43,871 shares). Old name, new name

Inferred typo: the share class "Common Sock" is treated as the same class as "Common Stock" on 1 holding line, because the two spellings are nearly identical and each balance carried over exactly. Example (Wesley Bush, 327,129 shares): old title, new title

Inferred typo: the share class "Common tock" is treated as the same class as "Common Stock" on 1 holding line, because the two spellings are nearly identical and each balance carried over exactly. Example (Ronald Sugar, 148,100 shares): old title, new title

External context: we only cite outside events when a documented connection exists. None is shown for this period.

Sources and methodology2,080 filings from SEC EDGAR, and how we read them

All 2,080 Forms 3, 4 and 5 filed for Northrop Grumman (SEC CIK 1133421) from May 23, 2001 to Oct 1, 2026, retrieved from SEC EDGAR on Oct 9, 2026. Prices are the ones reported in each filing, often weighted averages. 42 filings were left out because Northrop Grumman filed them as an owner of another company's stock. 1 older filing exists only on paper and could not be read.

Probable 2-for-1 stock split on or before Aug 25, 2004 (first filing that shows post-split balances). Splits aren't reported as transactions; 30 holding lines changed by exactly this ratio, so earlier share counts are restated.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology

Former or inactive filers (78)No filing in 18 months; last reported balances, not in any total
NameLast filedLast reported balance
Graham RobinsonApr 1, 20251,984 shares, last reported balance as of Mar 31, 2025
Kenneth CrewsFeb 20, 20252,729 shares, last reported balance as of Feb 18, 2025
Mark CaylorFeb 23, 202416,546 shares, last reported balance as of Feb 21, 2024
David KefferFeb 21, 202416,640 shares, last reported balance as of Feb 16, 2024
Matthew BrombergMay 8, 20231,585 shares, last reported balance as of May 4, 2023
Karl KrapekApr 4, 202337,110 shares, last reported balance as of Mar 31, 2023
David PerryMar 8, 20239,367 shares, last reported balance as of Mar 6, 2023
Lucy RyanMar 6, 20234,144 shares, last reported balance as of Mar 2, 2023
Sheila ChestonFeb 23, 202327,058 shares, last reported balance as of Feb 21, 2023
Lesley KalanFeb 21, 202317,958 shares, last reported balance as of Feb 16, 2023
Ann AddisonFeb 21, 202312,508 shares, last reported balance as of Feb 16, 2023
Mary PetryszynFeb 21, 202312,592 shares, last reported balance as of Feb 16, 2023
Thomas Wilson Jr.Feb 21, 20233,000 shares, last reported balance as of Feb 16, 2023
Stephen O'BryanFeb 21, 2023No balance on record
Donald FelsingerMay 19, 202257,703 shares, last reported balance as of May 18, 2022
William HernandezMay 19, 20227,585 shares, last reported balance as of May 18, 2022
Shawn PurvisFeb 17, 202213,281 shares, last reported balance as of Feb 15, 2022
Blake LarsonJan 4, 202214,843 shares, last reported balance as of Dec 31, 2021
Janis PamiljansFeb 24, 202114,767 shares, last reported balance as of Feb 22, 2021
Bruce GordonMay 22, 202025,752 shares, last reported balance as of May 20, 2020
Kenneth BedingfieldFeb 14, 202041,896 shares, last reported balance as of Feb 12, 2020
Marianne BrownJan 3, 20205,367 shares, last reported balance as of Dec 31, 2019
Christopher JonesAug 21, 201964,822 shares, last reported balance as of Aug 19, 2019
Wesley BushMay 28, 2019492,401 shares, last reported balance as of May 23, 2019
Patrick AntkowiakMay 22, 20195,208 shares, last reported balance as of May 20, 2019
Denise PeppardMar 5, 201914,513 shares, last reported balance as of Mar 1, 2019
Lisa DavisFeb 22, 20182,070 shares, last reported balance as of Feb 18, 2018
Gloria FlachNov 15, 201771,259 shares, last reported balance as of Nov 13, 2017
Sid AshworthOct 31, 201787,132 shares, last reported balance as of Oct 27, 2017
Vic FazioMay 19, 201761,760 shares, last reported balance as of May 17, 2017
Thomas ViceMay 12, 201772,453 shares, last reported balance as of May 10, 2017
Richard MyersJan 4, 201731,386 shares, last reported balance as of Dec 8, 2016
Darryl FraserFeb 23, 201672,853 shares, last reported balance as of Feb 20, 2016
Darryl FraserFeb 23, 20163,000 shares, last reported balance as of Feb 20, 2016
Kevin SharerApr 2, 201569,730 shares, last reported balance as of Mar 31, 2015
James PalmerMar 11, 2015222,074 shares, last reported balance as of Mar 9, 2015
Linda MillsDec 5, 2014160,851 shares, last reported balance as of Dec 4, 2014
Aulana PetersMay 23, 201440,589 shares, last reported balance as of May 21, 2014
Stephen FrankMay 23, 201432,151 shares, last reported balance as of May 21, 2014
Lewis ColemanDec 4, 201279,380 shares, last reported balance as of Nov 30, 2012
Gary ErvinSep 4, 201217,072 shares, last reported balance as of Feb 22, 2012
James PittsAug 20, 20122,829 shares, last reported balance as of Aug 17, 2012
Alexander LivanosFeb 16, 201299,229 shares, last reported balance as of Feb 14, 2012
Kenneth HeintzMay 20, 201178,170 shares, last reported balance as of May 19, 2011
Mark RabinowitzMay 9, 201137,778 shares, last reported balance as of May 6, 2011
Michael PettersFeb 23, 2011123,183 shares, last reported balance as of Feb 15, 2011
Thomas FargoJan 4, 20115,870 shares, last reported balance as of Dec 31, 2010
Stephen YslasMar 15, 201094,121 shares, last reported balance as of Mar 12, 2010
Robert HelmFeb 18, 2010104,793 shares, last reported balance as of Feb 16, 2010
Ian ZiskinFeb 18, 201054,715 shares, last reported balance as of Feb 16, 2010
James CameronFeb 18, 201085,697 shares, last reported balance as of Feb 16, 2010
Ronald SugarNov 16, 2009864,517 shares, last reported balance as of Nov 13, 2009
Philip TeelMay 1, 200973,457 shares, last reported balance as of Apr 30, 2009
Charles LarsonApr 1, 20093,919 shares, last reported balance as of Mar 31, 2009
Phillip FrostApr 1, 200991,556 shares, last reported balance as of Mar 31, 2009
Philip OdeenMar 31, 200839,018 shares, last reported balance as of Mar 31, 2008
Brien OMar 6, 200819,011 shares, last reported balance as of Mar 4, 2008
Burks TerryMar 6, 2008140,167 shares, last reported balance as of Mar 4, 2008
Jerry AgeeFeb 29, 200881,106 shares, last reported balance as of Feb 27, 2008
Scott SeymourFeb 27, 2008125,372 shares, last reported balance as of Feb 25, 2008
Neill OFeb 27, 200870,773 shares, last reported balance as of Feb 25, 2008
John Chain Jr.Apr 2, 200712,452 shares, last reported balance as of Mar 30, 2007
James SanfordFeb 23, 200748,850 shares, last reported balance as of Feb 21, 2007
John SlaughterJun 30, 20064,165 shares, last reported balance as of Jun 30, 2006
Michael HateleyFeb 23, 200624,004 shares, last reported balance as of Feb 22, 2006
John MullanFeb 22, 200649,097 shares, last reported balance as of Feb 21, 2006
Albert MyersFeb 17, 200669,335 shares, last reported balance as of Feb 15, 2006
Philip DurDec 13, 200568,093 shares, last reported balance as of Dec 12, 2005
Donald WinterNov 14, 200590,000 shares, last reported balance as of Nov 11, 2005
Robert IorizzoJun 1, 200582,164 shares, last reported balance as of May 31, 2005
Sandra WrightMar 1, 200527,941 shares, last reported balance as of Feb 28, 2005
Charles NoskiJan 26, 2005106,901 shares, last reported balance as of Jan 24, 2005
Michael CookJan 26, 20052,376 shares, last reported balance as of Jan 24, 2005
Thomas SchievelbeinJun 15, 200481,384 shares, last reported balance as of Feb 17, 2004
Jay NussbaumMay 21, 20041,824 shares, last reported balance as of Feb 9, 2004
Herbert AndersonFeb 19, 2004108,986 shares, last reported balance as of Feb 17, 2004
Richard Waugh Jr.Nov 24, 2003168,372 shares, last reported balance as of Nov 22, 2003
Kent KresaNov 24, 20031,211,777 shares, last reported balance as of Nov 22, 2003

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