Northrop Grumman builds things that very few companies in the world can build: stealth bombers, missile defense systems, satellites, and the radars that protect warships from incoming threats. Almost all of its $42 billion in annual revenue comes from long-term contracts with the U.S. government and its allies. The company wins a contract, spends years engineering and building the product, and gets paid as work is completed. Four divisions handle different slices of that work: Aeronautics Systems makes military aircraft and drones, Defense Systems makes missiles and ammunition, Mission Systems makes radars and sensors, and Space Systems builds satellites and rocket motors. The diagram below traces where the money goes.

Five years of financial data tell a clear story. Revenue climbed steadily from $35.7 billion in 2021 to $42.0 billion in 2025. Operating cash flow improved even more noticeably, rising from $3.6 billion in 2021 to $4.8 billion in 2025. Free cash flow, which is what remains after the company pays for equipment and facilities, grew from $2.2 billion to $3.3 billion over the same period. That trajectory points toward a business generating more real cash each year.

One number shows just how far forward the work is already booked. At the end of 2025, the company held $95.7 billion in backlog, meaning contracts already won but not yet finished. That is more than two full years of revenue sitting in the queue before a single new contract is needed.

But not every number points upward. Gross margin wobbled across the five years, ranging from a low of about 16.7 percent in 2023 to roughly 20.4 percent in 2022 and 2024. The reason is the B-21 Raider stealth bomber program. In the fourth quarter of 2023, Northrop recognized a $1.56 billion projected loss across five early production lots of the B-21. Then in the first quarter of 2025, it recognized another $477 million loss on the same program. These are real cash costs absorbed by the company, not passed on to the Air Force.

The B-21 losses are a direct result of fixed-price contract risk. Northrop agreed to build the first production aircraft at locked-in prices, and then inflation, supply chain problems, and rising labor costs pushed actual costs above those locked-in numbers. The company cannot go back to the Air Force and ask for more money on those early lots. That said, later aircraft batches, called NTE lots, include a clause that adjusts prices for certain inflation, which is a meaningful structural improvement over the early production terms.

A second program to watch is Sentinel, which is the replacement for America's land-based nuclear missiles. In January 2024, the Air Force notified Congress that Sentinel had breached cost thresholds under a law called the Nunn-McCurdy Act. This triggered a formal review and a requirement to either fix the program or cancel it. In July 2024, the program was certified to continue, but it is being restructured, and the production pricing has not yet been negotiated. The outcome of those negotiations will shape Northrop's financial results for years.

Despite the program-level turbulence, net debt has stayed in a range of $9.2 billion to $10.8 billion across the five years, without a dramatic deterioration. The company is not shrinking its debt load aggressively, but it is also not letting it balloon. Cash from operations has been sufficient to keep the business stable while absorbing large loss provisions.

The risks here are specific and documented. The U.S. government accounted for 84 percent of Northrop's 2025 sales. That means Congress, budget fights, government shutdowns, and debt ceiling debates are not abstract political noise for this company. They directly affect when the company gets paid and whether programs continue. The U.S. government briefly shut down in October 2025 and did not pass a full budget for 2026 before the year ended. Northrop was operating under a temporary spending extension at the time of its annual filing.

Supply chain is a second documented pressure point. The company flagged shortages of microelectronics and specialized materials. So far these have not materially disrupted operations, but the filing makes clear that the risk remains active. And roughly half of all sales come from fixed-price contracts, meaning any future cost surprises, whether from tariffs, inflation, or labor, land on Northrop's books rather than the customer's.