Northrop Grumman Corporation (NOC)
Northrop Grumman is a defense contractor specializing in aircraft, missiles, and space systems.
Industrials stock comparison
NOC vs TDG: which business are you actually underwriting?
Compare Northrop Grumman Corporation with TransDigm Group Incorporated using their business models, SEC classifications, fiscal calendars, current primary filings, and the research questions that matter. This is a thesis framework—not a price target or automatic winner.
- Sector
- Industrials
- Industry
- Different SIC
- Shared themes
- 1
- Updated
- 2026-01-27
NOC vs TDG: quick comparison
| Company fact | NOC | TDG |
|---|---|---|
| Company | Northrop Grumman Corporation | TransDigm Group Incorporated |
| Exchange | NYSE | NYSE |
| SEC industry | Search, Detection, Navigation, Guidance, Aeronautical Sys | Aircraft Parts & Auxiliary Equipment, NEC |
| Fiscal year-end | December 31 | September 30 |
| Latest annual filing | 10-K · 2026-01-27 | 10-K · 2025-11-12 |
NOC vs TDG: audited financials
NOC reported about 4.8× the revenue of TDG in the latest audited fiscal year. On profitability, TDG converted a larger share of revenue into net income (23.5% versus 10.0%). Scale and margin are starting facts for the thesis, not the verdict.
| Metric | NOC | TDG |
|---|---|---|
| Revenue | $42.0B | $8.8B |
| Net income | $4.2B | $2.1B |
| Operating cash flow | $4.8B | $2.0B |
| Diluted EPS | $29.08 | $32.08 |
| Net margin | 10.0% | 23.5% |
NOC: FY ending 2025-12-31 · TDG: FY ending 2025-09-30. Figures as tagged in each issuer's SEC XBRL filing; fiscal calendars may not align.
How the businesses differ
Why this pair belongs in the comparison set
NOC and TDG have different SEC industry classifications, but both map to the maintained Wars & geopolitics research theme inside the Industrials sector. A shared classification or theme makes the pair useful for a defined research question; it does not mean the companies have identical products, economics, or risks.
TransDigm Group Incorporated (TDG)
TransDigm makes proprietary aerospace components used on commercial and military aircraft.
The useful starting point is not which ticker has performed better. It is whether the two companies convert the same economic forces into revenue and cash flow in the same way. NOC is classified by the SEC as Search, Detection, Navigation, Guidance, Aeronautical Sys, while TDG is classified as Aircraft Parts & Auxiliary Equipment, NEC. The different industry codes are a warning against treating sector membership as proof of identical economics.
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The thesis, the numbers behind it, and what would break it. Full access is $15 a month.
Read the full researchWhich thesis does each company fit?
Use the distinction below to decide which filing deserves deeper work. It is a research routing rule, not a recommendation or prediction.
Study NOC when…
- Capital-spending and manufacturing PMIs
- Reshoring and supply-chain reconfiguration
- Defense budgets and geopolitical conflict
- Freight rates and logistics demand
Study TDG when…
- Capital-spending and manufacturing PMIs
- Reshoring and supply-chain reconfiguration
- Defense budgets and geopolitical conflict
- Freight rates and logistics demand
Shared research themes
Wars & geopolitics
SEC filing comparison and disclosure evidence
Start with primary filings because fiscal calendars and accounting presentation can make superficially similar quarters incomparable.NOC's fiscal year ends December 31, while TDG's ends September 30. Normalize the reporting periods before comparing growth, margins, capital intensity, or guidance.
The current verified House and Senate snapshot contains 13matched transaction rows for NOCand 28 for TDG. These delayed, range-based disclosures can identify a filing to inspect; they do not establish motive, conviction, or a real-time trading signal.
NOC primary filings
TDG primary filings
What this comparison cannot tell you
This page does not contain licensed live prices, a valuation model, earnings estimates, portfolio constraints, or a forecast of future returns. SEC classifications can be broad, company descriptions can lag strategic change, and the latest annual filing may predate a material acquisition or divestiture. Read subsequent quarterly and current reports before making a decision.
A stronger business is not automatically the better stock. Starting valuation, expectations, capital structure, cyclicality, dilution, and the probability of each thesis determine the investment outcome. Use this comparison to frame the work, then verify the numbers in the linked filings and current company disclosures.
More comparisons involving NOC or TDG
NOC vs TDG FAQs
Are NOC and TDG direct competitors?
Northrop Grumman Corporation and TransDigm Group Incorporated sit in the same Industrials sector but have different SEC industry classifications. The comparison is most useful for portfolio role and sector exposure, not as a claim that every product competes directly.
Which is better, NOC or TDG?
There is no context-free winner. Compare the operating exposures, filing evidence, valuation, balance sheet, and risks against the specific thesis you are testing. This page deliberately does not turn a static profile into a buy or sell recommendation.
Does this NOC vs TDG comparison include live prices?
No. Yield Theory does not republish unlicensed real-time market data. The financial figures on this page are the audited annual numbers Northrop Grumman Corporation and TransDigm Group Incorporated tagged in their SEC XBRL filings. Use a regulated broker or licensed quote provider for current prices and valuation multiples.
Where does the company information come from?
Company classifications, fiscal year-ends, and filing links come from the SEC EDGAR submissions API snapshot refreshed 2026-09-25. Business summaries and research themes are maintained by Yield Theory.
Data snapshot: SEC EDGAR submissions API, refreshed 2026-09-25. Independent educational research; not investment advice.
A comparison is the setup. The thesis is the call.
NOC vs TDG shows how the businesses differ. Membership is the monthly sourced view of who could benefit, what could break, and what evidence matters next. $15/month or $150/year.
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