TTEK vs WSPOF: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of October 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. TTEK and WSPOF share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined TTEK and WSPOF exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Tetra Tech provides consulting, engineering, program management, and construction management services focused on water, environment, and sustainable infrastructure, operating through its Government Services Group (GSG) and Commercial/International Services Group (CIG). Its clients span US federal, state, and local agencies plus commercial and international customers, and its expertise in water resources, environmental remediation, and data analytics has made it one of the leading pure-play firms in the space alongside AECOM, WSP, Jacobs, Stantec, and Arcadis.

Full TTEK guide

WSP Global Inc. is one of the world's largest engineering, science and advisory firms, with about 83,000 employees in more than 50 countries. It designs and advises on transportation, buildings, water, environmental services, mining, and power and energy work across Canada, the U.S., Latin America, Europe, the Middle East and Asia Pacific. It is paid professional fees for design, consulting and program management rather than taking on construction risk, which keeps the business asset-light and cash generative. Growth comes from steady organic expansion plus serial acquisitions: Parsons Brinckerhoff in 2014, POWER Engineers in 2024, the UK consultancy Ricardo in October 2025 and TRC Companies, a U.S. power, utility and environmental consultant with about 8,000 staff, in February 2026. WSPOF is an OTC quote for the same ordinary shares, not a sponsored ADR, so one WSPOF share equals one TSX share priced in U.S. dollars.

Full WSPOF guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• TTEK drivers: Water and environmental infrastructure demand; Returning to growth after the funding pause.
• WSPOF drivers: Power and energy demand; Margin expansion through productivity.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: The biggest risk is dependence on government spending, shown vividly when a USAID and State Department funding pause cut roughly $200 million in one quarter and hundreds of millions in annualized revenue; trailing revenue is still running about 4 percent below a year ago. For WSPOF, the central debate in 2026 is whether generative AI tools will reduce the hours engineering and design firms bill, which has driven a sector-wide de-rating and roughly a 35% year-to-date drop in WSP shares even as results beat guidance.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick TTEK if you believe its drivers more; WSPOF if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the TTEK and WSPOF guides.

TTEK. At about $34.70, TTEK trades near 21 times trailing and 20 times forward earnings, and roughly 15 times EV/EBITDA, a modest premium to the commercial-services group that reflects its specialized positioning and steady margins. The six analysts covering the stock carry a mean target of about $40.50 and a buy-leaning consensus. Fiscal Q4 results on November 11, 2026 are the next test of whether revenue is turning back up.

WSPOF. Figures are in Canadian dollars, WSP's reporting currency, and are approximate as of mid October 2026; the WSPOF price is the TSX price converted to U.S. dollars and can differ slightly because of OTC spreads. With an enterprise value of roughly C$29 billion against the midpoint of 2026 EBITDA guidance, the stock trades near 9x, well below the premium it carried in 2024 and 2025. Trailing P/E on reported earnings is about 23, inflated by acquisition costs. The C$0.375 quarterly dividend yields under 1%, so the return case rests on earnings growth rather than income.

Headline figures (approximate, October 2026): TTEK shows revenue (ttm) ~$4.36B, revenue growth (latest quarter, yoy) ~-4%, operating / net margin ~14% / ~10%, net income (ttm) ~$436M; WSPOF shows share price (tsx: wsp) ~C$162 (WSPOF ~US$117), market cap / net debt ~C$22 billion / ~C$6.9 billion, net revenue (q2 2026) ~C$4.27 billion, up ~22.9%, adjusted eps (q2 2026) C$2.88, up from C$2.35.

TTEK and WSPOF are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined TTEK and WSPOF exposure against your real portfolio. It is not an investment adviser.