The forward P/E of 23.25x is roughly half the trailing multiple, implying the market expects significant earnings growth, but the PEG of 4.91 suggests that growth is already priced in. Compared to Exponent's 33.5x P/E, Tetra Tech's premium over traditional E&C peers like AECOM (15.5x) and Primoris (15.8x) appears justified by its higher net margin (8.4% vs. 3.5% for AECOM) and asset-light model. However, the EV/EBITDA of 15.7x is below Exponent's 24.9x, indicating the market still applies an industrial discount rather than a pure tech multiple.

The 200 basis point gross margin decline coincides with a 17% reduction in SG&A, indicating management is offsetting pass-through cost pressures with overhead control. Net margin of 8.4% remains above the peer average, but the quarterly EPS miss ($0.42 vs. $0.47) suggests that gross margin erosion may be more than transitory. Investors should monitor whether the mix shift toward data center work, which may carry lower gross margins, becomes a permanent feature of the revenue base.

The 2025Q2 dip to 1.2% ROIC appears tied to the RPS integration and a one-time operating margin collapse to 3.6%. While ROIC has recovered to 4.4%, it still lags the 5.0% seen in 2025Q4, suggesting that capital deployed in acquisitions is not yet generating full returns. With goodwill at 116% of equity, the efficiency of capital allocation is critical; if the RPS acquisition fails to deliver synergies, ROIC could stagnate.

The 30-day DSO reduction is a positive signal for working capital efficiency, likely driven by improved billing processes on federal contracts. However, DPO of 18 days is low, suggesting Tetra Tech pays subcontractors quickly, which may be a competitive necessity but reduces cash retention. The cash conversion cycle is not calculable due to missing DIO, but the strong FCF margin of 17.2% in 2026Q3 indicates that working capital swings are being managed effectively.

The reduction in D/E from 0.78 to 0.55 reflects both debt repayment and equity growth, and interest coverage of 22.1x is robust, well above the 11.9x seen in 2024Q2. However, D/EBITDA of 6.48x is elevated, though this is distorted by the low EBITDA in the quarter; on a trailing basis, leverage appears manageable. The $216.6 million acquisition outflow in 2026Q2 suggests continued M&A appetite, which could reverse the deleveraging trend if not offset by cash flow.

The current ratio of 1.18 is adequate but not generous, and the absence of inventory means the quick ratio is identical, reducing the risk of obsolete stock. Cash of $230.8 million provides a modest buffer, but the reliance on government contracts means cash flows can be lumpy, as seen in the 2025Q2 negative FCF. Under a severe stress scenario, the company would likely rely on its $1.0 billion debt capacity, but the 0.55 D/E suggests room to borrow if needed.

The valuation gap versus AECOM and Primoris is justified by Tetra Tech's higher net margin (8.4% vs. 3.5% and 3.6%) and ROIC (4.4% vs. 18.6% for AECOM, though AECOM's ROIC is inflated by a lower capital base). However, Exponent's ROIC of 36.3% and net margin of 18.2% highlight the potential for Tetra Tech to improve profitability if it can shift further toward data and analytics. The market appears to be pricing Tetra Tech as a higher-quality E&C firm, but not yet as a pure environmental tech play.