NORTHROP GRUMMAN CORP /DE/

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.

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. Segment operating income includes pension expense allocated to our sectors under FAR and CAS and excludes FAS pension service expense and unallocated corporate items (certain corporate-level expenses, which are not considered allowable or allocable under applicable FAR and CAS requirements, and costs not considered part of management’s evaluation of segment operating performance). These non-GAAP measures may be useful to investors and other users of our financial statements as supplemental measures in evaluating the financial performance and operational trends of our sectors. These measures may not be defined and calculated by other companies in the same manner and should not be considered in isolation or as alternatives to operating results presented in accordance with GAAP.

First quarter 2026 segment operating income increased $504 million, or 89 percent, primarily due to $488 million of higher operating income at Aeronautics Systems and $72 million of higher operating income at Mission Systems, partially offset by $48 million of lower operating income at Space Systems. Segment operating margin rate increased to 10.8 percent from 6.0 percent primarily due to a higher operating margin rate at Aeronautics Systems and Mission Systems, partially offset by a lower operating margin rate at Space Systems.

FAS/CAS Operating Adjustment

The first quarter 2026 FAS/CAS operating adjustment reflects lower CAS pension expense largely driven by favorable plan asset returns in prior years.

Unallocated Corporate Expense

The increase in first quarter 2026 unallocated corporate expense is primarily due to the resolution of a litigation matter as well as higher deferred state tax expense largely related to the repeal of mandatory capitalization of research and development expenditures under IRC Section 174.

Net EAC Adjustments - We record changes in estimated contract earnings at completion (net EAC adjustments) using the cumulative catch-up method of accounting. Net EAC adjustments can have a significant effect on segment operating income and margin rate.

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The aggregate favorable and unfavorable EAC adjustments are presented in the table below:

Net EAC adjustments by segment are presented in the table below:

Sales

First quarter 2026 sales increased $469 million, or 17 percent, primarily due to higher sales on B-21 and other restricted programs as well as increased volume on the E-130J TACAMO program as it ramps up. The higher B-21 sales reflect the company’s first quarter 2026 agreement with the U.S. Air Force to expand production capacity and increase the aircraft production rate, including the sale of a company-owned test asset. The sales increases were partially offset by a decrease on F/A-18 as final production deliveries have completed.

First quarter 2026 operating income increased $488 million and operating margin rate increased to 9.3 percent primarily due to the absence of the prior year B-21 loss provision.

Sales

First quarter 2026 sales increased $94 million, or 5 percent, primarily due to higher volume on Sentinel as that program continues to ramp, as well as higher volume on tactical solid rocket motor programs and across the Integrated Battle Command System (IBCS) portfolio. These increases were partially offset by a $72 million reduction in sales related to the divested training services business.

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First quarter 2026 operating income increased $5 million, or 3 percent, primarily due to higher sales, partially offset by a lower operating margin rate. Operating margin rate decreased to 9.7 percent from 9.9 percent principally due to lower net EAC adjustments.

Sales

First quarter 2026 sales increased $54 million, or 2 percent, primarily due to ramp-up on restricted airborne radar programs and higher volume on marine systems programs, partially offset by lower volume on the Scalable Agile Beam Radar program and airborne electronic warfare programs.

First quarter 2026 operating income increased $72 million, or 20 percent, primarily due to a higher operating margin rate and higher sales. Operating margin rate increased to 15.1 percent from 12.9 percent, primarily due to prior year investments made by the sector in connection with restricted business opportunities, as well as higher net EAC adjustments in the current year.

Sales

First quarter 2026 sales decreased $88 million, or 3 percent, primarily due to wind-down of work on the NGI program, which reduced sales by $98 million, as well as lower sales on the GEM 63XL program related to the unfavorable EAC adjustment described below. These decreases were partially offset by higher volume on Space Development Agency satellite programs driven by ramp-up on the Tranche 3 tracking layer award.

First quarter 2026 operating income decreased $48 million, or 17 percent, due to a lower operating margin rate and lower sales. Operating margin rate decreased to 9.5 percent from 11.0 percent, largely due to lower net EAC adjustments, including a $71 million unfavorable adjustment on GEM 63XL associated with a launch anomaly that occurred during the first quarter.

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