The forward P/E of 19.55 is nearly identical to the trailing multiple, implying the market expects flat earnings growth, consistent with the 2.2% revenue growth reported in the latest quarter. The PEG of 2.19 indicates that the stock is priced at a premium to its near-term growth rate, which may reflect the long-duration backlog and strategic importance of the B-21 and Sentinel programs. Compared to peers, NOC's EV/EBITDA of 16.59 is lower than LMT's 17.70 and RTX's 23.26, suggesting the market is not fully pricing in the potential margin expansion from production ramp-ups, or it is discounting the execution risks on fixed-price contracts.

The decline in gross margin over the past year suggests that fixed-price contract transitions, particularly on the B-21 LRIP, are absorbing inflationary input costs. Operating margin has been volatile, with a trough of 6.1% in 2025Q1, but the recovery to 10.1% in 2026Q2 indicates some stabilization, though it remains below the 2025Q2 peak. Net margin of 10.1% in 2026Q2 is supported by a lower tax rate and non-operating items, but the core earning power appears to be the operating margin, which is being pressured by R&D and SG&A overhead that is not scaling with revenue.

The low ROIC, relative to peers like LMT at 23.9% and GD at 12.5%, reflects the capital-intensive nature of defense programs and the high level of goodwill from the Orbital ATK acquisition. ROE has been more variable, ranging from 3.2% in 2025Q1 to 8.7% in 2025Q4, driven by quarterly earnings volatility and share buybacks. The stability of ROIC around 2.5% suggests that margin improvements are being offset by increases in invested capital, particularly in PPE for new production facilities, which may not yield returns until programs reach full-rate production.

The increase in DSO from 70 days in 2024Q4 to 87 days in 2026Q2 suggests that the company is carrying higher receivables, possibly due to the timing of large program billings. DPO has remained relatively stable around 28-34 days, indicating that NOC is not stretching supplier payments to fund operations. The negative FCF margin in 2026Q1 (-18.4%) and 2025Q1 (-19.2%) highlights the seasonality of working capital, with cash outflows for inventory and receivables in the first quarter, followed by strong collections in the fourth quarter. This pattern suggests that the company's cash conversion is heavily dependent on government payment cycles, which can be unpredictable.

Total debt declined from $20.0B to $16.3B over the period, while equity grew to $17.9B, reflecting retained earnings and limited dilution. The D/EBITDA ratio of 11.13 in 2026Q2 is elevated, but this is partly due to the low EBITDA margin and the inclusion of operating leases; the trend is improving from 20.31 in 2025Q1. Interest coverage of 8.25x in 2026Q2 is adequate, though it dipped to 4.71x in 2025Q1 when operating income was depressed, indicating that the company has sufficient cushion but is sensitive to margin shocks. The reported D/E excludes pension and lease obligations, which could understate true leverage, but the improving trend suggests reduced refinancing risk.

The current ratio has been consistently above 1.0, indicating that current assets exceed current liabilities, but the buffer is thin, especially given the large swings in working capital. The quick ratio of 1.06 in 2026Q2 suggests that inventory is not a major liquidity concern, as it is only 11% of current assets. However, the negative FCF in Q1 quarters indicates that the company may need to rely on credit lines or cash reserves to fund operations during periods of high working capital outflows. With cash at $2.3B, the liquidity position appears adequate for normal operations, but a severe stress scenario, such as a program cancellation or a government shutdown, could strain the balance sheet.