Northrop Grumman Corp (NOC) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Oct 1, 2026.
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- Filings shown
- 4
- Open-market buys
- 0
- Open-market sells
- 10
Counts cover the 4 most recent Form 4 filings Tradune holds for NOC (filed Aug 4 – Oct 1, 2026). No completed check of NOC's Form 4 list on SEC EDGAR is on record yet; the latest NOC filing Tradune holds was filed Oct 1, 2026. This is not guaranteed to be the complete record — see NOC's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 4 filings Tradune holds for NOC filed Aug 4 – Oct 1, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
10 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 0 sales· 0 sh
- checkbox disclosed
- On filings with the box not checked
- 0 sales· 0 sh
- not proof that no plan exists
- Not comparable
- 10 sales· 95 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Mark A. Welsh IIIDirector | 0 | 10 | — | 95 | −$52,015 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at NOC
No open-market insider purchases (Form 4 code P) were reported for NOC in the trailing 90 days. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 75 | $483.48 | 2,837 | +2.7% | Sep 30, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 96 | $483.48 | 11,706 | +0.8% | Sep 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Market Stock Units | 35,910 | — | — | — | Aug 19, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 31 | $547.42 | — | — | Aug 3, 2026 |
| Open-market sale | 10 | $548.32 | — | — | Aug 3, 2026 |
| Open-market sale | 6 | $549.50 | — | — | Aug 3, 2026 |
| Open-market sale | 8 | $544.53 | — | — | Aug 3, 2026 |
| Open-market sale | 2 | $552.95 | — | — | Aug 3, 2026 |
| Open-market sale | 2 | $553.90 | — | — | Aug 3, 2026 |
| Open-market sale | 4 | $554.14 | — | — | Aug 3, 2026 |
| Open-market sale | 2 | $550.68 | — | — | Aug 3, 2026 |
| Open-market sale | 19 | $545.59 | — | — | Aug 3, 2026 |
| Open-market sale | 11 | $546.42 | — | — | Aug 3, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to NOC's (Oct 1, 2026).
Frequently asked about NOC insider activity
How many insiders bought NOC stock in the last 90 days?
No open-market purchases (Form 4 code P) of NOC shares were reported by Northrop Grumman Corp insiders in the trailing 90 days. The 4 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for NOC?
The most recent Form 4 on this page was filed by Marianne Catherine Brown (Director) on Oct 1, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market NOC insider sale shown?
The largest open-market sale among the filings shown was 31 NOC shares at $547.42 (about $16,970) by Mark A. Welsh III (Director) on Aug 3, 2026. Value is shares × the price reported on the Form 4; trades may be made under a prearranged Rule 10b5-1 plan.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track NOC insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.