Put the drop in scale: Tetra Tech’s U.S. federal revenue fell $444,326,000 over nine months, roughly a third of a typical quarter’s sales at the company.
On the surface the quarter looks tidy. Revenue slid to $1.3 billion, gross profit eased to $243.2 million, and diluted EPS moved only from $0.43 to $0.42. Margins barely budged: gross margin ticked to 18.6% and operating margin stayed about 12.1%.
"For the third quarter and first nine months of fiscal 2026, revenue decreased 15.6% and 23.5%, respectively, compared to the prior-year periods primarily due to the aforementioned cancellation of contracts with USAID and lower disaster response activities."
Tetra Tech, 10-Q, 2026-07-31
Tetra Tech pins the topline hit squarely on cancelled USAID work and quieter disaster-response activity. That explains the bulk of the nine-month deterioration: U.S. federal revenue was $923,573 versus $1,367,899 a year earlier, a 32.5% fall, a $444,326 shortfall.
The company generated stronger operating cash flows despite the weaker top line.
"For the first nine months of fiscal 2026, cash from operating activities increased $109.7 million compared to the first nine months of fiscal 2025, primarily due to cash collections related to disaster response activities completed in the fourth quarter of fiscal 2025 and on terminated USAID programs."
Tetra Tech, 10-Q, 2026-07-31
Management says working-capital swings and one-time collections on completed and terminated programs drove roughly $110 million of extra operating cash. Free cash flow margin is up too, the filing shows free cash flow margin at 12.1%, a 3.7 percentage-point improvement year over year, and net interest expense fell (quarterly net interest was $7,158 versus $8,288 a year ago), reflecting lower borrowings and rates.
So the picture is two-part: fewer government projects are trimming revenue, but the company is harvesting cash from the tail of prior work and paying less in interest. That improves short-term liquidity, cash sits near $231 million, even as the pipeline for similar federal work looks lighter this year.
This matters because Tetra Tech’s history is one of steady growth into government and commercial work: revenue climbed from $2.8 billion in 2017 to $5.4 billion in 2025. The new filing shows the federal channel can swing materially quarter-to-quarter; a $444 million nine-month hole is big relative to a billion-dollar quarterly run rate.
Investors will be looking for two concrete follow-ups: whether the company books comparable new U.S. federal contracts or disaster-response assignments, and whether next quarter’s operating cash again carries a one-time collection benefit. The next quarterly report should show whether the federal revenue gap begins to refill or remains a structural drag.
Cash levels improved; the decline in federal projects remains a concern.