Biggest changeThese decreases were partially offset by a $42 million benefit from insurance recoveries in our commercial space business during 2023. -36- NORTHROP GRUMMAN CORPORATION PRODUCT AND SERVICE ANALYSIS The following table presents product and service sales and operating costs and expenses by segment: Year Ended December 31 $ in millions 2024 2023 2022 Segment Information: Sales Operating Costs and Expenses Sales Operating Costs and Expenses Sales Operating Costs and Expenses Aeronautics Systems Product $ 9,064 $ 8,248 $ 8,157 $ 8,942 $ 7,981 $ 7,161 Service 2,723 2,382 2,389 2,099 2,311 2,042 Intersegment eliminations 243 218 240 218 239 212 Total Aeronautics Systems 12,030 10,848 10,786 11,259 10,531 9,415 Defense Systems Product 5,843 5,304 5,282 4,819 4,604 4,163 Service 1,862 1,641 2,231 1,959 2,231 1,985 Intersegment eliminations 855 749 776 682 794 700 Total Defense Systems 8,560 7,694 8,289 7,460 7,629 6,848 Mission Systems Product 8,076 7,000 7,749 6,669 7,376 6,291 Service 2,146 1,805 2,092 1,730 2,005 1,639 Intersegment eliminations 1,177 996 1,054 887 1,015 848 Total Mission Systems 11,399 9,801 10,895 9,286 10,396 8,778 Space Systems Product 9,743 8,711 9,709 8,844 8,561 7,664 Service 1,576 1,398 1,681 1,468 1,533 1,404 Intersegment eliminations 412 368 483 431 476 424 Total Space Systems 11,731 10,477 11,873 10,743 10,570 9,492 Total Product $ 32,726 $ 29,263 $ 30,897 $ 29,274 $ 28,522 $ 25,279 Total Service 8,307 7,226 8,393 7,256 8,080 7,070 Total Segment (1) $ 41,033 $ 36,489 $ 39,290 $ 36,530 $ 36,602 $ 32,349 (1) A reconciliation of segment operating income to total operating income is included in “Segment Operating Results.” Product Sales and Costs 2024 product sales increased $1.8 billion, or 6 percent, due to an increase in product sales at all four sectors.
Biggest changeOperating margin rate increased to 11.0 percent from 10.7 percent principally due to more favorable contract mix. -36- Table of Contents NORTHROP GRUMMAN CORPORATION PRODUCT AND SERVICE ANALYSIS The following table presents product and service sales and operating costs and expenses by segment: Year Ended December 31 $ in millions 2025 2024 2023 Segment Information: Sales Operating Costs and Expenses Sales Operating Costs and Expenses Sales Operating Costs and Expenses Aeronautics Systems Product $ 9,723 $ 9,340 $ 9,211 $ 8,383 $ 8,280 $ 9,053 Service 3,102 2,687 3,053 2,658 2,745 2,399 Intersegment eliminations 167 152 132 119 139 128 Total Aeronautics Systems 12,992 12,179 12,396 11,160 11,164 11,580 Defense Systems Product 6,367 5,682 5,696 5,169 5,159 4,708 Service 1,425 1,263 1,532 1,365 1,875 1,659 Intersegment eliminations 210 186 171 149 151 134 Total Defense Systems 8,002 7,131 7,399 6,683 7,185 6,501 Mission Systems Product 8,854 7,608 8,076 7,000 7,749 6,669 Service 2,218 1,861 2,146 1,805 2,092 1,730 Intersegment eliminations 1,434 1,210 1,177 996 1,054 887 Total Mission Systems 12,506 10,679 11,399 9,801 10,895 9,286 Space Systems Product 8,797 7,827 9,743 8,711 9,709 8,844 Service 1,468 1,309 1,576 1,398 1,681 1,468 Intersegment eliminations 506 452 412 368 483 431 Total Space Systems 10,771 9,588 11,731 10,477 11,873 10,743 Total Product $ 33,741 $ 30,457 $ 32,726 $ 29,263 $ 30,897 $ 29,274 Total Service 8,213 7,120 8,307 7,226 8,393 7,256 Total Segment (1) $ 41,954 $ 37,577 $ 41,033 $ 36,489 $ 39,290 $ 36,530 (1) A reconciliation of segment operating income to total operating income is included in “Segment Operating Results.” Product Sales and Costs 2025 product sales increased $1.0 billion, or 3 percent, primarily due to higher sales on restricted airborne radar, marine systems and international ground-based radar programs at Mission Systems, higher volume on Sentinel, military ammunition programs and the IBCS program portfolio at Defense Systems, and higher sales on the F-35, TACAMO, E-2, and B-21 programs at Aeronautics Systems.
Major products and services include command, control, communications and computers, intelligence, surveillance and reconnaissance (C4ISR) systems; radar, electro-optical/infrared (EO/IR) and acoustic sensors; electronic warfare systems; advanced communications and network systems; advanced microelectronics; navigation and positioning sensors; maritime power, propulsion and payload launch systems; full spectrum cyber solutions; and intelligence processing systems.
Major products and services include radar, electro-optical/infrared (EO/IR) and acoustic sensors; command, control, communications and computers, intelligence, surveillance and reconnaissance (C4ISR) systems; electronic warfare systems; advanced communications and network systems; advanced microelectronics; navigation and positioning sensors; maritime power, propulsion and payload launch systems; full spectrum cyber solutions; and intelligence processing systems.
Due to the inherent uncertainty of this assumption, we consider multiple data points at the measurement date including the plan’s target asset allocation, historical plan asset returns and third-party projection models of expected long-term returns for each of the plans’ strategic asset classes.
Due to the inherent uncertainty of this assumption, we consider multiple data points at the measurement date including the plan’s target asset allocation, third-party projection models of expected long-term returns for each of the plans’ strategic asset classes and historical plan asset returns.
Air Force awarded Northrop Grumman a $13.3 billion contract for the EMD phase of the Sentinel program. In January 2024, the U.S. Air Force provided congressional notification that the Sentinel program was under a Nunn-McCurdy breach review, which is required when total program cost estimates exceed certain defined thresholds.
Sentinel Program In 2020, the U.S. Air Force awarded Northrop Grumman a $13.3 billion contract for the EMD phase of the Sentinel program. In January 2024, the U.S. Air Force provided congressional notification that the Sentinel program was under a Nunn-McCurdy breach review, which is required when total program cost estimates exceed certain defined thresholds.
Interest is credited monthly using the current 30-Year Treasury bond rate. The interest crediting rate is part of the cash balance formula and independent of actual pension investment returns. The cash balance crediting rate tends to move in concert with the discount rate but has an offsetting effect on pension benefit obligations and the related MTM expense (benefit).
Interest is credited monthly using the current 30-Year Treasury bond rate. The interest crediting rate is part of the cash balance formula and independent of actual pension investment returns. In general, the cash balance crediting rate tends to move in concert with the discount rate but has an offsetting effect on pension benefit obligations and the related MTM (benefit) expense.
Global Economic Environment Over the past several years, the global economic environment has experienced extraordinary challenges, including inflationary pressures; widespread delays and disruptions in supply chains; business slowdowns or shutdowns; workforce challenges and labor shortfalls; and market volatility.
Global Economic Environment Over the past several years, the global economic environment has experienced challenges, including inflationary pressures; widespread delays and disruptions in supply chains; business slowdowns or shutdowns; workforce challenges and labor shortfalls; and market volatility.
We use adjusted free cash flow as a key factor in our planning for, and consideration of, acquisitions, the payment of dividends and stock repurchases.
We use free cash flow as a key factor in our planning for, and consideration of, acquisitions, the payment of dividends and stock repurchases.
In July 2024, the Sentinel program was certified for continuation by the DoD upon completion of the Nunn-McCurdy breach review. In connection with the certification, the DoD directed that the program be restructured, including plans for infrastructure related to the command and launch segment, which was the main driver of the increased cost estimates for the Production and Deployment phases.
In July 2024, the Sentinel program was certified for continuation by the DoW upon completion of the Nunn-McCurdy breach review. In connection with the certification, the DoW directed that the program be restructured, including plans for infrastructure related to the command and launch segment, which was the main driver of the increased cost estimates for the Production and Deployment phases.
Air Force, the U.S. Navy, other U.S. government agencies, and international customers. Major products include strategic long-range strike aircraft; tactical fighter and air dominance aircraft; airborne battle management and command and control systems; and unmanned autonomous aircraft systems, including high-altitude long-endurance (HALE) strategic intelligence, surveillance and reconnaissance (ISR) systems.
Air Force, the U.S. Navy, other U.S. government agencies, and international customers. Major products include strategic long-range strike aircraft; tactical fighter and air dominance aircraft; airborne battle management and command and control systems; and uncrewed autonomous aircraft systems, including high-altitude long-endurance (HALE) strategic intelligence, surveillance and reconnaissance (ISR) systems.
These conflicts have resulted in and may continue to result in increased demand for defense products and services from allies and partner nations, particularly in those areas. For example, we have experienced an increase in demand for certain of our products and services directly and indirectly related to the conflict in Ukraine.
These conflicts have resulted in and may continue to result in increased demand for defense products and services from allies and partner nations, particularly in those regions. For example, we experienced an increase in demand for certain of our products and services directly and indirectly related to the conflict in Ukraine.
Factors that could result in changes to the assessment of probability, range of reasonably estimated costs and environmental accruals include: modification of planned remedial actions; changes in the estimated time required to conduct remedial actions; discovery of more or less extensive (or different) contamination -43- NORTHROP GRUMMAN CORPORATION than anticipated; information regarding the potential causes and effects of contamination; results of efforts to involve other responsible parties; financial capabilities of other responsible parties; changes in laws and regulations, their interpretation or application; contractual obligations affecting remediation or responsibilities; and improvements in remediation technology.
Factors that could result in changes to the assessment of probability, range of reasonably estimated costs and environmental accruals include: modification of planned remedial actions; changes in the estimated time required to conduct remedial actions; discovery of more or less extensive (or different) contamination than anticipated; information regarding the potential causes and effects of contamination; results of efforts to involve other responsible parties; financial capabilities of other responsible parties; changes in laws and regulations, their interpretation or application; contractual obligations affecting remediation or responsibilities; and improvements in remediation technology.
Discount Rate – The discount rate represents the interest rate used to determine the present value of future cash flows currently expected to be required to settle our pension and OPB obligations. The discount rate is generally based on the yield of high-quality corporate fixed-income investments.
Discount Rate – The discount rate represents the interest rate we use to determine the present value of future cash flows currently expected to be required to settle our pension and OPB obligations. The discount rate is generally based on the yield of high-quality corporate fixed-income investments.
Determinations regarding whether to record a reserve and, if so, of what amount, reflect management’s assessment regarding what is likely to occur; they do not necessarily reflect what management believes should occur. The ultimate resolution of any such exposure to us may vary materially from earlier estimates as further facts and circumstances develop or become known to us.
Determinations regarding whether to accrue a loss and, if so, of what amount, reflect management’s assessment regarding what is likely to occur; they do not necessarily reflect what management believes should occur. The ultimate resolution of any such exposure to us may vary materially from earlier estimates as further facts and circumstances develop or become known to us.
We believe our capabilities, particularly in space, C4ISR, missile defense, battle management, advanced weapons, strategic deterrence, and survivable aircraft and mission systems should help our customers in the U.S. and globally defend against current and future threats and, as a result, continue to allow for long-term profitable business growth.
We believe our capabilities, particularly in space, C4ISR, air and missile defense, battle management, advanced weapons, strategic deterrence, survivable aircraft and mission systems should help our customers in the U.S. and globally defend against current and future threats and, as a result, continue to position us for long-term profitable business growth.
Revenue Recognition Due to the long-term nature of our contracts, we generally recognize revenue over time using the cost-to-cost method, which requires us to make reasonably dependable estimates regarding the revenue and cost associated with the design, manufacture and delivery of our products and services.
Revenue Recognition Due to the long-term nature of our contracts, we generally recognize revenue over time using the cost-to-cost method, which requires us to make reasonable estimates regarding the revenue and cost associated with the design, manufacture and delivery of our products and services.
When it is more likely than not that a tax position will be sustained, we record the largest amount of tax benefit with a greater than 50 percent likelihood of being realized upon ultimate settlement with a taxing authority. As of December 31, 2024, we have approximately $1.4 billion in unrecognized tax benefits.
When it is more likely than not that a tax position will be sustained, we record the largest amount of tax benefit with a greater than 50 percent likelihood of being realized upon ultimate settlement with a taxing authority. As of December 31, 2025, we have approximately $1.6 billion in unrecognized tax benefits.
This income valuation method requires management to project sales, operating expenses, working capital, capital -44- NORTHROP GRUMMAN CORPORATION spending and cash flows for the reporting units over a multi-year period, as well as to determine the weighted-average cost of capital (WACC) used as a discount rate and terminal value assumptions.
This income valuation method requires management to project sales, operating expenses, working capital, capital spending and cash flows for the reporting units over a multi-year period, as well as to determine the weighted-average cost of capital (WACC) used as a discount rate and terminal value assumptions.
Estimating liabilities and costs associated with these matters requires judgment based upon the professional knowledge and experience of management. We determine whether to record a reserve and, if so, what amount based on consideration of the facts and circumstances of each matter as then known to us.
Estimating liabilities and costs associated with these matters requires judgment based upon the professional knowledge and experience of management. We determine whether to accrue a loss and, if so, what amount based on consideration of the facts and circumstances of each matter as then known to us.
As a result, sales tend to fluctuate in concert with costs incurred across our large portfolio of contracts. -29- NORTHROP GRUMMAN CORPORATION Due to the applicable FAR and CAS requirements that govern our U.S. government business, most types of costs are allocable to U.S. government contracts.
As a result, sales tend to fluctuate in concert with costs incurred across our large portfolio of contracts. Due to the applicable FAR and CAS requirements that govern our U.S. government business, most types of costs are allocable to U.S. government contracts.
For further information regarding our pension and OPB plans, see “Risk Factors” and Notes 1 and 12 to the consolidated financial statements. Litigation, Commitments and Contingencies We are subject to a range of claims, disputes, enforcement actions, investigations, lawsuits, overhead cost claims, environmental matters, income tax matters and administrative proceedings that arise in the ordinary course of business.
For further information regarding our pension and OPB plans, see “Risk Factors” and Notes 1 and 12 to the consolidated financial statements. -42- Table of Contents NORTHROP GRUMMAN CORPORATION Litigation, Commitments and Contingencies We are subject to a range of claims, disputes, enforcement actions, investigations, lawsuits, overhead cost claims, environmental matters, income tax matters and administrative proceedings that arise in the ordinary course of business.
Holding all other assumptions constant, an increase or decrease of 25 basis points in the December 31, 2024 cash balance crediting rate assumption would have the following estimated effects on the 2024 pension benefit obligation, which would be reflected in the 2024 MTM (benefit) expense, and 2025 expected pension expense: $ in millions 25 Basis Point Decrease in Rate 25 Basis Point Increase in Rate 2024 pension obligation and MTM (benefit) expense $ (101) $ 104 2025 pension (benefit) expense (9) 9 Expected Long-Term Rate of Return on Plan Assets – The expected long-term rate of return on plan assets (EROA) assumption reflects the average rate of net earnings we expect on current and future benefit plan investments.
Holding all other assumptions constant, an increase or decrease of 25 basis points in the December 31, 2025 cash balance crediting rate assumption would have the following estimated effects on the 2025 pension benefit obligation, which would be reflected in the 2025 MTM (benefit) expense, and 2026 expected pension expense: $ in millions 25 Basis Point Decrease in Rate 25 Basis Point Increase in Rate 2025 pension obligation and MTM (benefit) expense $ (106) $ 110 2026 pension (benefit) expense (9) 10 Expected Long-Term Rate of Return on Plan Assets – The expected long-term rate of return on plan assets (EROA) assumption reflects the average rate of net earnings we expect on current and future benefit plan investments.
We continue to work to address challenges caused by the macroeconomic environment on our business. We have seen positive progress in the supply chain as on-time deliveries and quality have improved. In remaining areas of pressure, we are proactively working with our suppliers to ensure we meet our contract commitments.
We continue to work to address challenges to our business caused by the macroeconomic environment. We have seen progress in the supply chain as on-time deliveries and quality continue to improve. In remaining areas of pressure, we are proactively working with our suppliers to help meet our contract commitments.
Holding all other assumptions constant, an increase or decrease of 25 basis points in our December 31, 2024 EROA assumption would have the following estimated effects on 2025 expected pension and OPB expense: $ in millions 25 Basis Point Decrease 25 Basis Point Increase 2025 pension and OPB expense (benefit) $ 75 $ (75) In addition, holding all other assumptions constant, an increase or decrease of 100 basis points in actual versus expected return on plan assets would have the following estimated effects on our 2025 MTM expense (benefit): $ in millions 100 Basis Point Decrease 100 Basis Point Increase 2025 MTM expense (benefit) $ 300 $ (300) Estimated Fair Market Value of Plan Assets – For certain plan assets where the fair market value is not readily determinable, such as real estate, private equity, hedge funds and opportunistic investments, we develop estimates of fair value using the best information available.
Holding all other assumptions constant, an increase or decrease of 25 basis points in our December 31, 2025 EROA assumption would have the following estimated effects on 2026 expected pension and OPB expense (benefit): $ in millions 25 Basis Point Decrease 25 Basis Point Increase 2026 pension and OPB expense (benefit) $ 79 $ (79) In addition, holding all other assumptions constant, an increase or decrease of 100 basis points in actual versus expected return on plan assets would have the following estimated effects on our 2026 MTM expense (benefit): $ in millions 100 Basis Point Decrease 100 Basis Point Increase 2026 MTM expense (benefit) $ 314 $ (314) Estimated Fair Market Value of Plan Assets – For certain plan assets where the fair market value is not readily determinable, such as private equity, real estate, and other alternative investments, we develop estimates of fair value using the best information available.
LIQUIDITY AND CAPITAL RESOURCES We are focused on the efficient conversion of operating income into cash to provide for the company’s material cash requirements, including working capital needs, satisfaction of contractual commitments, funding of our pension and OPB plans, investment in our business through capital expenditures, and shareholder return through dividend payments and share repurchases.
LIQUIDITY AND CAPITAL RESOURCES We are focused on the efficient conversion of operating income into cash to provide for the company’s material cash requirements, including working capital needs, satisfaction of contractual commitments, investment in our business through capital expenditures, funding of our pension and OPB plans, and shareholder returns.
For determining 2024 FAS expense, we assumed an expected long-term rate of return on pension plan assets of 7.5 percent and an expected long-term rate of return on OPB plan assets of 7.12 percent. For 2025 FAS expense, we have assumed an expected long-term rate of return on pension plan assets of 7.5 percent and 7.08 percent on OPB plans.
For determining 2025 FAS expense, we assumed an expected long-term rate of return on pension plan assets of 7.5 percent and an expected long-term rate of return on OPB plan assets of 7.08 percent. For 2026 FAS expense, we have assumed an expected long-term rate of return of 7.5 percent on pension plan assets and 7.1 percent on OPB plans.
We believe the current global security environment highlights the significant national security threats to the U.S. and its allies, and the need for strong deterrence and robust defense capabilities, and are actively evaluating both opportunities and risks associated with this environment.
We believe the current global security environment, characterized by significant national security threats to the U.S. and its allies, continues to highlight the need for strong deterrence and robust defense capabilities, and we are actively evaluating both opportunities and risks associated with this environment.
Holding all other assumptions constant, an increase or decrease of 25 basis points in the December 31, 2024 discount rate assumption would have the following estimated effects on 2024 pension and OPB obligations, which would be reflected in the 2024 MTM expense (benefit), and 2025 expected pension and OPB expense: $ in millions 25 Basis Point Decrease in Rate 25 Basis Point Increase in Rate 2024 pension and OPB obligation and MTM expense (benefit) $ 785 $ (750) 2025 pension and OPB (benefit) expense (20) 19 Cash Balance Crediting Rate – A portion of the company’s pension obligation and resulting pension expense is based on a cash balance formula, where participants’ hypothetical account balances are accumulated over time with pay-based credits and interest.
Holding all other assumptions constant, an increase or decrease of 25 basis points in the December 31, 2025 discount rate assumption would have the following estimated effects on 2025 pension and OPB obligations, which would be reflected in the 2025 MTM (benefit) expense, and 2026 expected pension and OPB expense: $ in millions 25 Basis Point Decrease in Rate 25 Basis Point Increase in Rate 2025 pension and OPB obligation and MTM expense (benefit) $ 796 $ (761) 2026 pension and OPB (benefit) expense (22) 21 Cash Balance Crediting Rate – A portion of the company’s pension obligation and resulting pension expense is based on a cash balance formula, where participants’ hypothetical account balances are accumulated over time with pay-based credits and interest.
We employ judgment in making our estimates in consideration of historical experience, currently available information and various other assumptions that we believe to be reasonable under the circumstances. Actual results could differ from our estimates and assumptions, and any such differences could be material to our consolidated financial statements.
We employ judgment in making our estimates in consideration of historical experience, currently available information -39- Table of Contents NORTHROP GRUMMAN CORPORATION and various other assumptions that we believe to be reasonable under the circumstances. Actual results could differ from our estimates and assumptions, and any such differences could be material to our consolidated financial statements.
Since our contracts often span a period of several years, estimation of revenue, cost, and progress toward completion requires the use of judgment.
Since our contracts often span a period of several years, estimation of revenue, cost, and progress toward completion requires significant judgment.
BACKLOG Backlog represents the future sales we expect to recognize on firm orders received by the company and is equivalent to the company’s remaining performance obligations at the end of each period. It comprises both funded backlog (firm orders for which funding is authorized and appropriated) and unfunded backlog.
BACKLOG Backlog represents the future sales we expect to recognize on firm orders received by the company and is equivalent to the company’s remaining performance obligations at the end of each period. It comprises both funded backlog -37- Table of Contents NORTHROP GRUMMAN CORPORATION (firm orders for which funding is authorized and appropriated) and unfunded backlog.
The company has a five-year senior unsecured credit facility in an aggregate principal amount of $2.5 billion, and in April 2024, we renewed our one-year $500 million uncommitted credit facility. At December 31, 2024, there were no borrowings outstanding under these credit facilities.
The company has a five-year senior unsecured credit facility in an aggregate principal amount of $3.0 billion, and in April 2025, we renewed our one-year $500 million uncommitted credit facility. At December 31, 2025, there were no borrowings outstanding under these credit facilities.
These macroeconomic factors have contributed, and in the future could contribute, to increased costs, delays, disruptions and other performance challenges, as well as increased competing demands for limited resources to address such increased costs and other challenges, for our company, our suppliers and partners, and our customers.
These macroeconomic factors can and have contributed, and could continue to contribute, to increased costs, delays, disruptions and other performance challenges, as well as increased competing demands for limited resources to address such increased costs and other challenges, for our company, our suppliers and partners, and our customers.
Current and future requirements related to the conflicts in Ukraine and the Middle East, threats in the Pacific region and other security priorities, as well as the macroeconomic environment, the national debt, and other domestic priorities, among other things, in the U.S. and globally, will continue to impact our customers’ budgets, spending and priorities, and our industry.
Current and future requirements related to the conflict in Ukraine and threats in the Middle East, the Western Pacific and Latin America and other security priorities, as well as the macroeconomic environment, the national debt, and other domestic priorities, among other things, in the U.S. and globally, will continue to impact our customers’ budgets, spending and priorities, and our industry.
As of December 31, 2024, we had cash and cash equivalents of $4.4 billion; $268 million was held outside of the U.S. by foreign subsidiaries.
As of December 31, 2025, we had cash and cash equivalents of $4.4 billion; $265 million was held outside of the U.S. by foreign subsidiaries.
Our average annual rate of return from 1976 to 2024 was approximately 10.5 percent and our 20-year and 30-year rolling average rates of return were approximately 7.5 percent and 8.9 percent, respectively, each determined on an arithmetic basis and net of expenses. Our 2024 return on plan assets, net of expenses, was approximately 4.7 percent.
Our average annual rate of return from 1976 to 2025 was approximately 10.6 percent and our 20-year and 30-year rolling average rates of return were approximately 7.5 percent and 8.3 percent, respectively, each determined on an arithmetic basis and net of expenses. Our 2025 return on plan assets, net of expenses, was approximately 11.3 percent.
We use judgment to evaluate the recoverability of our environmental remediation costs, assessing, among other things, U.S. government regulations, our U.S. government contract mix and past practices. Portions of the company’s environmental liabilities we do not expect to be recoverable have been expensed.
We use judgment to evaluate the recoverability of our environmental remediation costs, assessing, among other things, U.S. government regulations, our U.S. government contract mix and past practices. Portions of the company’s environmental liabilities we do not expect to be recoverable are expensed when the liability is established.
When we determine changes in the assumptions are warranted, or as a result of plan amendments, future pension and OPB expense and our projected benefit obligation could increase or decrease materially.
When we determine changes in the assumptions are warranted, or as a result of plan amendments, future pension and OPB expense and our projected -40- Table of Contents NORTHROP GRUMMAN CORPORATION benefit obligation could increase or decrease materially.
Management's Discussion and Analysis of Financial Condition and Results of Operations” (MD&A) of our Form 10-K for the year ended December 31, 2023 (“2023 Annual Report on Form 10-K”). To the extent the July 1, 2024 SDS realignment impacted the disclosures in the 2023 Annual Report on Form 10-K, we recast those prior year MD&A disclosures herein.
Management's Discussion and Analysis of Financial Condition and Results of Operations” (MD&A) of our Form 10-K for the year ended December 31, 2024 (“2024 Annual Report on Form 10-K”). To the extent the January 1, 2025 SSAS realignment impacted the disclosures in the 2024 Annual Report on Form 10-K, we recast those prior year disclosures herein.
Taking into consideration the factors noted above, our weighted-average composite pension discount rate was 5.73 percent at December 31, 2024 and 5.15 percent at December 31, 2023. -41- NORTHROP GRUMMAN CORPORATION The effects of a hypothetical change in the discount rate may be nonlinear and asymmetrical for future years as the discount rate changes.
Taking into consideration the factors noted above, our weighted-average composite pension discount rate was 5.58 percent at December 31, 2025 and 5.73 percent at December 31, 2024. The effects of a hypothetical change in the discount rate may be nonlinear and asymmetrical for future years as the discount rate changes.
We continue to monitor developments in these regions, but have not experienced, and do not anticipate experiencing, significant adverse financial impacts directly from the conflicts in Ukraine or the Middle East.
We continue to monitor developments in these regions, but have not experienced, and do not anticipate experiencing, significant adverse financial impacts directly from these conflicts.
Diluted Earnings Per Share The table below reconciles diluted earnings per share to MTM-adjusted EPS: Year Ended December 31 % Change in 2024 2023 2022 2024 2023 Diluted earnings per share $ 28.34 $ 13.53 $ 31.47 109 % (57) % MTM (benefit) expense per share (3.02) 2.78 (7.92) NM NM MTM-related deferred state tax expense (benefit) per share (1) 0.16 (0.14) 0.42 NM NM Federal tax expense (benefit) of items above per share (2) 0.60 (0.56) 1.57 NM NM MTM adjustment per share, net of tax (2.26) 2.08 (5.93) NM NM MTM-adjusted EPS $ 26.08 $ 15.61 $ 25.54 67 % (39) % (1) The deferred state tax impact in each period was calculated using the company’s blended state tax rate of 5.25 percent and is included in Unallocated corporate expense within operating income.
Diluted Earnings Per Share The table below reconciles diluted earnings per share to MTM-adjusted EPS: Year Ended December 31 % Change in 2025 2024 2023 2025 2024 Diluted earnings per share $ 29.08 $ 28.34 $ 13.53 3 % 109 % MTM (benefit) expense per share (3.66) (3.02) 2.78 21 % NM MTM-related deferred state tax expense (benefit) per share (1) 0.19 0.16 (0.14) 19 % NM Federal tax expense (benefit) of items above per share (2) 0.73 0.60 (0.56) 22 % NM MTM adjustment per share, net of tax (2.74) (2.26) 2.08 21 % NM MTM-adjusted EPS $ 26.34 $ 26.08 $ 15.61 1 % 67 % (1) The deferred state tax impact in each period was calculated using the company’s blended state tax rate of 5.25 percent and is included in Unallocated corporate expense within operating income.
Goodwill and Long-Lived Assets Overview – We allocate the purchase price of acquired businesses to the underlying tangible and intangible assets acquired and liabilities assumed based upon their respective fair values, with the excess recorded as goodwill.
Goodwill and Long-Lived Assets Overview – We allocate the purchase price of acquired businesses to the underlying tangible and intangible assets acquired and liabilities assumed based upon their respective fair values, with the excess, as well as any adjustments during the initial measurement period, recorded as goodwill.
Net Earnings The table below reconciles net earnings to MTM-adjusted net earnings: Year Ended December 31 % Change in $ in millions 2024 2023 2022 2024 2023 Net earnings $ 4,174 $ 2,056 $ 4,896 103 % (58) % MTM (benefit) expense (443) 422 (1,232) NM NM MTM-related deferred state tax expense (benefit) (1) 23 (22) 65 NM NM Federal tax expense (benefit) of items above (2) 88 (84) 245 NM NM MTM adjustment, net of tax (332) 316 (922) NM NM MTM-adjusted net earnings $ 3,842 $ 2,372 $ 3,974 62 % (40) % (1) The deferred state tax impact in each period was calculated using the company’s blended state tax rate of 5.25 percent and is included in Unallocated corporate expense within operating income.
Net Earnings The table below reconciles net earnings to MTM-adjusted net earnings: Year Ended December 31 % Change in $ in millions 2025 2024 2023 2025 2024 Net earnings $ 4,182 $ 4,174 $ 2,056 — % 103 % MTM (benefit) expense (527) (443) 422 19 % NM MTM-related deferred state tax expense (benefit) (1) 28 23 (22) 22 % NM Federal tax expense (benefit) of items above (2) 105 88 (84) 19 % NM MTM adjustment, net of tax (394) (332) 316 19 % NM MTM-adjusted net earnings $ 3,788 $ 3,842 $ 2,372 (1) % 62 % (1) The deferred state tax impact in each period was calculated using the company’s blended state tax rate of 5.25 percent and is included in Unallocated corporate expense within operating income.
Mark-to-Market Pension and OPB Benefit/Expense The primary components of pre-tax MTM benefit (expense) are presented in the table below: Year Ended December 31 $ in millions 2024 2023 2022 Actuarial gains (losses) on projected benefit obligation $ 1,314 $ (1,489) $ 9,662 Actuarial (losses) gains on plan assets (871) 1,067 (8,430) MTM benefit (expense) $ 443 $ (422) $ 1,232 The 2024 MTM benefit of $443 million was primarily driven by a 58 basis point increase in the discount rate from year end 2023, partially offset by actual net plan asset returns of 4.7 percent compared to our 7.5 percent asset return assumption.
Mark-to-Market Pension and OPB Benefit/Expense The primary components of pre-tax MTM benefit (expense) are presented in the table below: Year Ended December 31 $ in millions 2025 2024 2023 Actuarial (losses) gains on projected benefit obligation $ (609) $ 1,314 $ (1,489) Actuarial gains (losses) on plan assets 1,136 (871) 1,067 MTM benefit (expense) $ 527 $ 443 $ (422) The 2025 MTM benefit of $527 million was primarily driven by actual net plan asset returns of 11.3 percent compared to our 7.5 percent asset return assumption, partially offset by a 15 basis point decrease in the discount rate from year end 2024.
For further information regarding product and service operating costs and expenses, see “Product and Service Analysis” below.
See “Segment Operating Results” below for further information by segment. For further information regarding product and service operating costs and expenses, see “Product and Service Analysis” below.
In January 2024, we issued $2.5 billion of unsecured senior notes for general corporate purposes, including debt repayment, share repurchases and working capital. The company’s principal contractual commitments include purchase obligations, repayments of long-term debt and related interest, and payments under operating leases. At December 31, 2024, we had $20.5 billion of purchase obligations, approximately half of which is short-term.
In May 2025, we issued $1.0 billion of unsecured senior notes for general corporate purposes, including debt repayment, share repurchases and working capital. The company’s principal contractual commitments include purchase obligations, repayments of long-term debt and related interest, and payments under operating leases. At December 31, 2025, we had $23.9 billion of purchase obligations, approximately half of which are short-term.
(2) The federal tax impact in each period was calculated by subtracting the deferred state tax impact from MTM benefit (expense) and applying the 21 percent federal statutory rate. 2024 diluted earnings per share increased $14.81, or 109 percent, reflecting the 103 percent increase in net earnings described above and a 3 percent reduction in weighted-average diluted shares outstanding.
(2) The federal tax impact in each period was calculated by subtracting the deferred state tax impact from MTM (benefit) expense and applying the 21 percent federal statutory rate. 2025 diluted earnings per share increased $0.74, or 3 percent, reflecting comparable net earnings and a 2 percent reduction in weighted-average diluted shares outstanding.
For a more complete description of each segment’s products and services, see “Business.” Segment Operating Income and Margin Rate Segment operating income, as reconciled in the table below, and segment operating margin rate (segment operating income divided by sales) are non-GAAP measures that reflect the combined operating income of our four segments less the operating income associated with intersegment sales.
This realignment is reflected in the financial information contained in this report. -32- Table of Contents NORTHROP GRUMMAN CORPORATION For a more complete description of each segment’s products and services, see “Business.” Segment Operating Income and Margin Rate Segment operating income, as reconciled in the table below, and segment operating margin rate (segment operating income divided by sales) are non-GAAP measures that reflect the combined operating income of our four segments less the operating income associated with intersegment sales.
DEFENSE SYSTEMS Defense Systems is a leader in the design, engineering, development, integration and production of strategic deterrent systems, advanced tactical weapons, and missile defense solutions, and a provider of sustainment, modernization and training services for manned and unmanned aircraft and electronics systems for the U.S. military and a broad range of international customers.
DEFENSE SYSTEMS Defense Systems is a leader in the design, engineering, development, integration and production of strategic deterrent systems, advanced tactical weapons, and missile defense solutions for the U.S. military and a broad range of international customers.
The minimum cash balance crediting rate allowed under the plan is 2.25 percent. The cash balance crediting rate assumption has been set to its current level of 4.78 percent as of December 31, 2024, increasing to 4.90 percent by 2030.
The minimum cash balance crediting rate allowed under the plan is 2.25 percent. The cash balance crediting rate assumption has been set to its current level of 4.84 percent as of December 31, 2025, increasing to 5.26 percent by 2031.
If our estimated cost to complete the aircraft changes or our assumptions regarding contract performance, quantities, supplier negotiations, or funding to mitigate the impact of macroeconomic disruptions are resolved more or less favorably than what we have estimated, our financial position, results of operations and/or cash flows could be materially affected. Sentinel Program In 2020, the U.S.
If our estimated cost to complete the aircraft changes, if we reach an agreement with the customer regarding an accelerated production rate, or if our assumptions regarding contract performance, quantities, supplier negotiations, or funding to mitigate the impact of macroeconomic disruptions are resolved more or less favorably than what we have estimated, our financial position, results of operations and/or cash flows could be materially affected.
As such, after considering the information released by the RPEC in October 2021 as well as the company’s recent mortality experience, we adopted the full MP-2021 projection scale while continuing to use the Pri-2012 White Collar table, supplemented with 50% of the Gradual Wear-Off illustration as outlined in the RPEC’s 2022 Mortality Improvement Update paper to reflect the future impacts of COVID-19, to develop our mortality assumptions used in calculating our pension and OPB obligations recognized at December 31, 2024, and the amounts estimated for our 2025 pension and OPB expense.
As such, after considering the information released by the RPEC in October 2021 as well as the company’s recent mortality experience, we adopted the full MP-2021 projection scale while continuing to use the Pri-2012 White Collar table, supplemented with 50% of the Gradual Wear-Off illustration as outlined in the RPEC’s 2022 Mortality Improvement Update paper to reflect the future impacts of COVID-19.
As of December 31, 2024, we expect approximately 93 percent of the company’s environmental remediation costs to be recoverable; however, to the extent our judgments on the recoverability of our environmental remediation costs change or the unallowable portion of our environmental remediation costs otherwise increase, there could be a significant impact on our consolidated financial position, annual results of operations and/or cash flows.
To the extent our judgments on the recoverability of our environmental remediation costs change or the unallowable portion of our environmental remediation costs otherwise increase, there could be a significant impact on our consolidated financial position, annual results of operations and/or cash flows.
For example, we have included in our EACs management’s best estimate of the impact inflation and disruptions in the supply chain have had and may continue to have on our contracts.
We also consider the impact of macroeconomic factors on our estimates, in particular on contract EACs that span several years. For example, we have included in our EACs management’s best estimate of the impact inflation and disruptions in the supply chain have had and may continue to have on our contracts.
During 2024, the Investment Committee of the company’s benefit plans reviewed the plans’ major asset class allocations and approved an update to increase the target fixed-income asset allocation from 43% to 45%. The actual asset allocation as of December 31, 2024 was approximately 41% fixed-income, 29% public equities, 23% alternatives, 6% private credit and 1% cash.
During 2025, the Investment Committee of the company’s benefit plans reviewed the plans’ major asset class allocations and approved an update to increase the target fixed-income asset allocation from 45% to 48%. The actual -41- Table of Contents NORTHROP GRUMMAN CORPORATION asset allocation as of December 31, 2025 was approximately 43% fixed-income, 28% public equities, 27% alternatives, and 2% cash.
See Note 15 to the consolidated financial statements for information regarding the company’s sales by customer type, contract type and geographic region for each of our segments.
See “Segment Operating Results” below for further information by segment and “Product and Service Analysis” for product and service detail. See Note 15 to the consolidated financial statements for information regarding the company’s sales by customer type, contract type and geographic region for each of our segments.
CONSOLIDATED OPERATING RESULTS For purposes of the operating results discussion below, we assess our performance using certain financial measures that are not calculated in accordance with accounting principles generally accepted in the United States of America (“GAAP” or “FAS”).
CONSOLIDATED OPERATING RESULTS Non-GAAP Financial Measures For purposes of the operating results discussion below, we assess our performance using certain financial measures that are not calculated in accordance with accounting principles generally accepted in the United States of America (“GAAP” or “FAS”), as follows: • Organic sales is defined as total sales excluding sales attributable to the company's former training services business.
Purchase obligations are largely comprised of open purchase -38- NORTHROP GRUMMAN CORPORATION order commitments to suppliers and subcontractors under U.S. government contracts. In most circumstances, our risk associated with the purchase obligations on our U.S. government contracts is limited to the termination liability provisions within those contracts.
Purchase obligations are largely comprised of open purchase order commitments to suppliers and subcontractors under U.S. government contracts. In most circumstances, our risk associated with the purchase obligations on our U.S. government contracts is limited by the termination liability provisions within those contracts. As such, we do not believe they represent a material liquidity risk to the company.
Economic tensions and changes in international trade policies, including higher tariffs on imported goods and materials, the imposition of retaliatory tariffs or other trade protection measures and renegotiation of free trade agreements, could also further impact the global market for defense products, services and solutions. U.S.
Economic tensions and changes in international trade policies, including, for example, the widespread tariffs announced since last year by the U.S. on its major trading partners, higher tariffs on imported goods and materials and actions taken in response (such as retaliatory tariffs or other trade protectionist measures or the renegotiation of free trade agreements), could also further impact the global market for defense products, services and solutions.
Factors considered in these estimates include our historical performance, the availability, productivity and cost of labor, the nature and complexity of work to be performed, the effect of change orders, availability and cost of materials, components and subcontracts, the effect of any delays in performance and the level of indirect cost allocations. -40- NORTHROP GRUMMAN CORPORATION We also consider the impact of macroeconomic factors on our estimates, in particular on contract EACs that span several years.
Factors considered in these estimates include our historical performance, the availability, productivity and cost of labor, the nature and complexity of work to be performed, the effect of change orders, availability and cost of materials, components and subcontracts, the effect of any delays in performance and the level of indirect cost allocations.
Cash returned to shareholders through share repurchases and dividends totaled $3.7 billion in 2024 and $2.6 billion in 2023. CRITICAL ACCOUNTING POLICIES AND ESTIMATES Our consolidated financial statements are prepared in conformity with GAAP, which requires us to make estimates and assumptions about future events that affect the amounts reported in our consolidated financial statements.
CRITICAL ACCOUNTING POLICIES AND ESTIMATES Our consolidated financial statements are prepared in conformity with GAAP, which requires us to make estimates and assumptions about future events that affect the amounts reported in our consolidated financial statements.
In addition, an overall increase in interest rates in recent years has raised the cost of borrowing for governments, and if rates further increase, it could impact government spending priorities (in the U.S. and allied countries, in particular), including their demand for defense products.
In addition, although interest rates have declined over the past year, they remain elevated compared to recent years and have raised the cost of borrowing for governments. If rates increase or remain elevated, it could impact government spending priorities (in the U.S. and allied countries, in particular), including the demand for defense products.
The Sentinel EAC incorporates our best estimate of costs to complete the restructured EMD effort; however, if the outcome is more or less favorable than what we have estimated, our financial position, results of operations and/or cash flows could be materially affected.
If our estimated cost to complete the restructured EMD effort or our expectations for achieving contract incentives are more or less favorable than what we have estimated, our financial position, results of operations and/or cash flows could be materially affected.
Consistent with our past practice, we obtained long-term capital market forecasting models from several third parties and, using our target asset allocation, developed an expected rate of return on plan assets from each model.
Consistent with our past practice, we obtained long-term capital market forecasting models from several third parties and, using our target asset allocation, developed an expected rate of return on plan assets from each model. We considered not only the specific returns projected by those third-party models, but also changes in the models year-to-year when developing our EROA.
SEGMENT OPERATING RESULTS Basis of Presentation The company is aligned in four operating sectors, which also comprise our reportable segments: Aeronautics Systems, Defense Systems, Mission Systems and Space Systems. Effective July 1, 2024, the company realigned the Strategic Deterrent Systems (SDS) division, which includes the Ground-Based Strategic Deterrent (“Sentinel”) program, from Space Systems to Defense Systems.
SEGMENT OPERATING RESULTS Basis of Presentation The company is aligned in four operating sectors, which also comprise our reportable segments: Aeronautics Systems, Defense Systems, Mission Systems and Space Systems. Effective January 1, 2025, the company realigned the Strike and Surveillance Aircraft Solutions (SSAS) business unit from Defense Systems to Aeronautics Systems.
Operating margin rate decreased to 10.0 percent from 10.2 percent, primarily due to lower net EAC adjustments. MISSION SYSTEMS Mission Systems is a leader in advanced mission solutions and multifunction systems, primarily for the U.S. defense and intelligence community, and international customers.
Operating margin rate increased to 10.9 percent from 9.7 percent primarily due to higher net EAC adjustments, including a $76 million favorable EAC adjustment on the Sentinel program during the second quarter of 2025. MISSION SYSTEMS Mission Systems is a leader in advanced mission solutions and multifunction systems, primarily for the U.S. defense and intelligence community, and international customers.
FAS/CAS Operating Adjustment The 2024 FAS/CAS operating adjustment reflects higher CAS pension expense largely driven by plan asset returns in prior years and changes in certain CAS actuarial assumptions as of December 31, 2023.
FAS/CAS Operating Adjustment The 2025 FAS/CAS operating adjustment reflects higher CAS pension expense largely driven by plan asset returns in prior years and changes in certain CAS actuarial assumptions as of December 31, 2024. Unallocated Corporate Expense The decrease in 2025 unallocated corporate expense is primarily due to a $231 million gain on the sale of our training services business.
The table below reconciles net cash provided by operating activities to adjusted free cash flow: Year Ended December 31 % Change in $ in millions 2024 2023 2022 2024 2023 Net cash provided by operating activities $ 4,388 $ 3,875 $ 2,901 13 % 34 % Capital expenditures (1,767) (1,775) (1,435) — % 24 % Proceeds from sale of equipment to a customer — — 155 NM (100) % Adjusted free cash flow $ 2,621 $ 2,100 $ 1,621 25 % 30 % 2024 adjusted free cash flow increased $521 million, or 25 percent, principally due to higher net cash provided by operating activities.
The table below reconciles net cash provided by operating activities to free cash flow: Year Ended December 31 % Change in $ in millions 2025 2024 2023 2025 2024 Net cash provided by operating activities $ 4,757 $ 4,388 $ 3,875 8 % 13 % Capital expenditures (1,450) (1,767) (1,775) (18) % — % Free cash flow $ 3,307 $ 2,621 $ 2,100 26 % 25 % 2025 free cash flow increased $686 million, or 26 percent, due to higher net cash provided by operating activities as well as lower capital expenditures.
The same is true for our suppliers and other business partners. The conflicts in Ukraine and the Middle East and threats elsewhere, particularly in the Pacific region, have increased global tensions and instability and highlighted security requirements globally, including in Europe, the Middle East and the Pacific region, as well as the U.S.
The ongoing conflict in Ukraine, recent events in Venezuela and threats elsewhere, particularly in the Middle East and the Western Pacific region, have increased global tensions and instability and highlighted security requirements globally, including in Europe, the Middle East, the Pacific region and Latin America, as well as the U.S.
(2) The federal tax impact in each period was calculated by subtracting the deferred state tax impact from MTM benefit (expense) and applying the 21 percent federal statutory rate. 2024 net earnings increased $2.1 billion, or 103 percent, primarily due to $1.8 billion of higher operating income, an $865 million increase in our MTM benefit (expense), and a $126 million increase in the non-operating FAS pension benefit.
(2) The federal tax impact in each period was calculated by subtracting the deferred state tax impact from MTM (benefit) expense and applying the 21 percent federal statutory rate. 2025 net earnings were comparable to the prior year and reflect the $141 million increase in operating income described above and an $84 million increase in our MTM benefit, partially offset by a $115 million decrease in the non-operating FAS pension benefit, $44 million of higher interest expense and a $44 million increase in income tax expense.
Air Force have established not to exceed (NTE) pricing for additional aircraft up to unit 40. The average NTE value for these subsequent lots is above the average unit price of the five LRIP lots, and the NTE lots include an economic price adjustment clause to help protect against certain inflationary pressures.
The average NTE value for these subsequent lots is above the average unit price of the five LRIP lots, and the NTE lots include an economic price adjustment clause to help protect against certain inflationary pressures. Final terms, quantity, and pricing for these subsequent lots are not fully negotiated. We are in discussions with the U.S.
Due to the many variables inherent in developing the estimates used in our impairment analyses, differences in assumptions may have a material effect on the results of those impairment analyses. -45- NORTHROP GRUMMAN CORPORATION
Impairment assessment inherently involves management judgments as to assumptions about expected future cash flows and the impact of market conditions on those assumptions. Due to the many variables inherent in developing the estimates used in our impairment analyses, differences in assumptions may have a material effect on the results of those impairment analyses. -44- Table of Contents NORTHROP GRUMMAN CORPORATION
Year Ended December 31 % Change in $ in millions 2024 2023 2022 2024 2023 Sales $ 11,731 $ 11,873 $ 10,570 (1) % 12 % Operating income 1,254 1,130 1,078 11 % 5 % Operating margin rate 10.7 % 9.5 % 10.2 % Sales 2024 sales decreased $142 million, or 1 percent, primarily due to wind-down of work on the restricted space and NGI programs, which reduced sales by $595 million.
Year Ended December 31 % Change in $ in millions 2025 2024 2023 2025 2024 Sales $ 10,771 $ 11,731 $ 11,873 (8) % (1) % Operating income 1,183 1,254 1,130 (6) % 11 % Operating margin rate 11.0 % 10.7 % 9.5 % Sales 2025 sales decreased $960 million, or 8 percent, primarily due to wind-down of work on the restricted space and NGI programs, which reduced sales by $738 million, as well as a $172 million decrease for the SDA satellite programs due to the timing of materials and a $102 million decrease driven by lower volume on the SLS Booster program.
Net EAC adjustments can have a significant effect on reported sales and operating income and the aggregate amounts are presented in the table below: Year Ended December 31 $ in millions 2024 2023 2022 Favorable EAC adjustments $ 1,461 $ 1,314 $ 1,337 Unfavorable EAC adjustments (1,111) (1,230) (977) Net EAC adjustments $ 350 $ 84 $ 360 -33- NORTHROP GRUMMAN CORPORATION Net EAC adjustments by segment are presented in the table below: Year Ended December 31 $ in millions 2024 2023 2022 Aeronautics Systems $ 151 $ (44) $ 174 Defense Systems 96 91 104 Mission Systems 59 149 138 Space Systems 42 (101) (31) Eliminations 2 (11) (25) Net EAC adjustments $ 350 $ 84 $ 360 AERONAUTICS SYSTEMS Aeronautics Systems is a leader in the design, development, production, integration, sustainment and modernization of military aircraft systems for the U.S.
The aggregate favorable and unfavorable EAC adjustments are presented in the table below: Year Ended December 31 $ in millions 2025 2024 2023 Favorable EAC adjustments $ 1,696 $ 1,461 $ 1,314 Unfavorable EAC adjustments (1,487) (1,111) (1,230) Net EAC adjustments $ 209 $ 350 $ 84 Net EAC adjustments by segment are presented in the table below: Year Ended December 31 $ in millions 2025 2024 2023 Aeronautics Systems $ (186) $ 157 $ (38) Defense Systems 168 90 82 Mission Systems 192 59 149 Space Systems 47 42 (101) Eliminations (12) 2 (8) Net EAC adjustments $ 209 $ 350 $ 84 AERONAUTICS SYSTEMS Aeronautics Systems is a leader in the design, development, production, integration, sustainment and modernization of military aircraft systems for the U.S.
Refer to the respective notes to the consolidated financial statements for further information about our share repurchase programs (Note 2), commercial paper, credit facilities and long-term debt (Note 9), standby letters of credit and guarantees (Note 11), future minimum contributions for the company’s pension and OPB plans (Note 12), and lease payment obligations (Note 14).
Refer to the respective notes to the consolidated financial statements for further information about our share repurchase programs (Note 2), commercial paper, credit facilities and long-term debt (Note 9), standby letters of credit and guarantees (Note 11), future minimum contributions for the company’s pension and OPB plans (Note 12), and lease payment obligations (Note 14). -38- Table of Contents NORTHROP GRUMMAN CORPORATION Cash Flow Measures In addition to our cash position, we consider various cash flow measures in capital deployment decision-making, including cash provided by operating activities and free cash flow, a non-GAAP measure described in more detail below.
However, the cost of PP&E utilized in support of our commercial business, including approximately $575 million of PP&E used in our commercial space business, is not allocable to government contracts and is therefore subject to greater recoverability risk. Impairment Testing – We test for impairment of goodwill annually at each of our reporting units, which comprise our operating segments.
However, the cost of PP&E utilized in support of our commercial business, including approximately $600 million of PP&E used in our -43- Table of Contents NORTHROP GRUMMAN CORPORATION commercial space business, is not allocable to government contracts and is therefore subject to greater recoverability risk.
We anticipate that issues related to budgetary priorities and defense spending levels, the debt ceiling, and the spending caps imposed by the Fiscal Responsibility Act of 2023 (FRA), particularly with respect to discretionary spending, will continue to be a subject of considerable debate, with a potentially significant impact on our programs and the company.
The U.S. political environment may also impact defense budgets and priorities, issues related to the national debt, and government spending more broadly. We anticipate that issues related to budgetary priorities, defense spending levels and the debt ceiling will continue to be subjects of considerable debate, with a potentially significant impact on our programs and the company.
Year Ended December 31 % Change in $ in millions 2024 2023 2022 2024 2023 Sales $ 11,399 $ 10,895 $ 10,396 5 % 5 % Operating income 1,598 1,609 1,618 (1) % (1) % Operating margin rate 14.0 % 14.8 % 15.6 % Sales 2024 sales increased $504 million, or 5 percent, primarily due to higher volume on restricted advanced microelectronics and technology programs, increased marine systems sales due, in part, to the timing of materials, and higher Ground/Air Task Oriented Radar (G/ATOR) volume due to continued ramp-up on full-rate production (FRP) awards.
Year Ended December 31 % Change in $ in millions 2025 2024 2023 2025 2024 Sales $ 12,506 $ 11,399 $ 10,895 10 % 5 % Operating income 1,827 1,598 1,609 14 % (1) % Operating margin rate 14.6 % 14.0 % 14.8 % Sales 2025 sales increased $1.1 billion, or 10 percent, primarily due to continued ramp-up on restricted airborne radar programs, as well as higher sales of $161 million on marine systems programs, $141 million on international ground-based radar programs and $105 million on communications programs, as several programs ramp up following new awards.
We also had provisions for uncertain tax positions of $1.4 billion, some or all of which could result in future cash payments to various taxing authorities. At this time, we are unable to estimate the timing and amount of any future cash outflows related to these uncertain tax positions.
At this time, we are unable to estimate the timing and amount of any future cash outflows related to these uncertain tax positions.
The results of those debates could have material impacts on defense spending broadly and the company’s programs in particular. B-21 Program In 2015, the U.S. Air Force awarded Northrop Grumman the B-21 contract, which includes a base contract for engineering and manufacturing development (EMD) and five low-rate initial production (LRIP) options for a baseline total of 21 aircraft.
Air Force awarded Northrop Grumman the B-21 contract, which includes a base contract for engineering and manufacturing development (EMD) and five low-rate initial production (LRIP) options for a baseline total of 21 aircraft. The EMD phase of the program is largely cost type and began at contract award.