Where did Lockheed Martin's margin go in a quarter its sales rose 11.3%?

Sales grew faster than profit, and cash grew faster than both

In the third quarter of 2026 Lockheed Martin, the US defence and aerospace group behind fighter jets, missiles and space systems, took USD 20.7bn in revenue, up 11.3% from USD 18.6bn in the same quarter of 2025. Operating profit, the profit from running the business before interest and tax, rose only 7.1%, to USD 2.4bn. Over the same twelve months its cash balance went from USD 3.5bn to USD 6.0bn, an increase of 71.8%. The figures cover the whole group, in US dollars, under US GAAP, the American accounting rules.

Three lines, three speeds. Sales grew, profit from operations grew more slowly, and cash grew far faster than either. The operating margin, the share of each dollar of sales left after running costs, slipped from 12.3% to 11.8%, a change of -0.5 pp.

These two movements deserve different weight. A cash balance is a picture of one day, the last day of the quarter. For a contractor paid in large instalments by governments, that picture can change with the timing of a single payment. The margin is different. It describes how much the group keeps on the work it is doing now, and that work runs for years. If one of the two numbers tells you something about next year, it is the margin.

The extra revenue carried a lower margin than the old

Start with the arithmetic. Revenue rose by USD 2.1bn year on year. Operating profit rose by USD 163m. The new dollars of sales therefore brought in far less profit per dollar than the business already earned on its existing work. That is the whole reason the average margin fell while both revenue and profit went up.

In a defence contractor the usual explanation is the life cycle of a programme. Contracts are priced years before production, and early production runs cost more per unit than mature ones, because the factory has not yet learned to build the product cheaply. When a new programme ramps up, it adds revenue quickly and profit slowly. The second common cause is mix: more of the quarter's sales came from a part of the business that always earns less, so the average falls even though no single contract went wrong.

The accounts do not split operating profit by programme, so they do not show which of the two applies here. The figure that would settle it is the operating margin by business segment, set against the same quarter a year earlier. A ramp-up should improve as volumes mature. A mix shift stays until the mix changes back.

Below the operating line the quarter looks better. Net profit rose 14.0% to USD 1.8bn, faster than operating profit, and the net margin edged up from 8.7% to 8.9%. Interest, tax and pension items sit between the two lines, and they move for reasons unrelated to how well the production lines run. I would not read much into one quarter's net margin.

A thicker equity cushion, built from inside

The balance sheet moved more than the income statement. Total assets grew from USD 60.3bn to USD 64.5bn. Over the same year equity rose by USD 3.9bn, to USD 10.1bn, an increase of 62.8%. Put those side by side and the larger balance sheet was paid for mostly by the owners' stake rather than by new debt. The equity ratio, equity as a share of total assets, rose from 10.3% to 15.6%, up 5.3 pp.

To a reader used to European mid-sized firms, an equity ratio this low looks thin. Among large US companies it is normal. They return much of their profit to shareholders through dividends and share buybacks, which keeps equity low by design.

Two explanations for the rise are most likely. The first is that the group kept more of its profit than it paid out over the year, through smaller buybacks or simply higher earnings. The second is pensions: defence groups carry large pension obligations on the balance sheet, and a change in interest rates or in the value of the pension fund can move equity by billions without any change in the business. The quarterly accounts do not separate the two, so they cannot settle which one drove the increase. The same caution applies to the cash. Until the full-year cash flow statement shows how much came from operations, from borrowing and from lower payouts, the higher balance remains a fact about one date.

What to check in your own company

The lesson here is not about defence. It is about the margin on growth, and any company that is growing can measure it in half an hour.

Take the same quarter or year in two consecutive periods. Subtract last period's revenue from this period's, and do the same for operating profit. Divide the extra operating profit by the extra revenue. That is your incremental margin: what you actually kept on the new business. Then compare it with your overall operating margin. If it is lower, growth is diluting you, and the average will keep sliding as new work becomes a larger share of the whole.

Next, ask your finance team which contracts or customers produced the extra revenue, and what margin each one carries. If the answer is a large contract priced to win, ask when its margin is expected to reach your average, and what happens if it never does. If the answer is a change in mix, ask whether that mix is temporary or the new normal.

Finally, before you celebrate a higher cash balance, put it next to your profit for the same period. If cash grew much faster than profit, find out why before you plan to spend it. A customer who paid early this quarter is a customer who will not pay next quarter.

Lockheed Martin ends the third quarter of 2026 with more cash and a thicker equity cushion than a year ago, and both are real. The more telling number is smaller and less flattering: the group grew by taking on work that pays less per dollar, and no cash balance, however large on the last day of September, changes that.