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Tetra Tech Inc (TTEK) stock

TTEKNasdaqServices-Engineering ServicesFiscal year ends September 27
Financials through Q3 FY2026, quarter ended Jun 28, 2026Last filing: 10-Q on Jul 31, 2026Score 15/308% below fair value
$38.65+0.56 (+1.47%)

Close on Oct 30, 2026Market cap $9.90BP/E 23.3Yield 0.64%

Price history

Tetra Tech share prices for every month, newest first. Adjusted for stock splits, not for dividends.

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Close, Oct 30, 2026
$38.65
+1.47% on the day
52-week range
$25.81 – $43.14
-10.4% from the high
Change over 52 weeks
+20.1%
From $32.18 on Oct 30, 2025
Average volume
2.45M
Shares a day, last 90 sessions
MonthOpenHighLowCloseChangeVolume
Oct 2026$33.06$38.76$32.02$38.65+17.30%43,067,641
Sep 2026$36.12$37.27$32.91$32.95-8.83%44,395,622
Aug 2026$33.69$37.59$33.53$36.14+8.99%55,975,153
Jul 2026$29.16$34.96$28.91$33.16+14.78%65,226,465
Jun 2026$27.49$29.49$26.71$28.89+5.09%85,574,545
May 2026$32.77$33.33$25.81$27.49-14.94%75,654,033
Apr 2026$30.37$34.29$29.88$32.32+7.30%58,078,039
Mar 2026$35.81$36.70$29.57$30.12-15.96%59,339,440
Feb 2026$37.66$43.14$32.16$35.84-4.83%74,567,156
Jan 2026$33.62$40.88$33.25$37.66+12.28%45,541,826
Dec 2025$34.48$35.60$33.25$33.54-3.45%41,221,686
Nov 2025$31.81$37.75$31.18$34.74+8.63%60,622,699
Oct 2025$32.57$34.87$31.57$31.98-4.19%50,548,997
Sep 2025$36.37$36.90$32.91$33.38-8.35%47,430,798
Aug 2025$37.02$37.88$35.17$36.42-0.87%41,296,610
Jul 2025$35.95$38.66$35.64$36.74+2.17%37,419,343
Jun 2025$34.75$36.67$34.01$35.96+2.92%40,014,772
May 2025$31.22$36.37$30.19$34.94+12.02%56,428,821
Apr 2025$29.25$31.60$27.27$31.19+6.63%41,639,006
Mar 2025$29.16$30.60$28.17$29.25+0.21%52,106,925
Feb 2025$35.57$35.76$28.98$29.19-20.68%62,256,855
Jan 2025$40.10$42.98$31.09$36.80-7.63%68,643,612
Dec 2024$41.33$43.50$39.19$39.84-4.02%37,703,936
Nov 2024$48.91$51.20$39.91$41.51-15.08%59,349,678
Oct 2024$47.09$50.69$46.43$48.88+3.65%33,281,818
Sep 2024$47.48$47.54$45.01$47.16-0.82%21,797,881
Aug 2024$44.47$48.26$43.45$47.55+11.49%31,238,095
Jul 2024$41.00$43.24$39.43$42.65+4.28%30,563,810
Jun 2024$42.14$43.56$40.31$40.90-2.39%28,951,205
May 2024$38.81$44.28$38.15$41.90+7.59%33,198,385
Apr 2024$36.92$39.30$36.50$38.94+5.42%32,923,185
Mar 2024$35.45$38.03$35.12$36.94+4.17%23,390,550
Feb 2024$32.58$36.28$31.73$35.46+12.10%30,485,720
Jan 2024$33.10$33.70$31.61$31.64-5.24%22,704,660
Dec 2023$31.48$33.99$31.48$33.39+5.55%25,812,175
Nov 2023$30.07$33.90$29.31$31.63+4.80%30,708,520
Oct 2023$30.25$33.47$28.67$30.18-0.74%35,585,060
Sep 2023$31.76$32.70$30.19$30.41-3.38%37,613,650
Aug 2023$33.61$34.30$31.09$31.47-7.01%39,389,120
Jul 2023$32.55$34.65$32.35$33.84+3.34%25,727,025
Jun 2023$27.61$33.10$27.11$32.75+19.11%39,427,005
May 2023$27.62$30.70$26.46$27.49-0.65%29,699,190
Apr 2023$29.28$29.57$26.67$27.67-5.81%23,334,525
Mar 2023$27.38$29.66$26.24$29.38+7.32%29,960,370
Feb 2023$31.10$31.92$27.04$27.38-11.98%28,594,205
Jan 2023$29.37$31.34$26.26$31.10+7.11%26,776,560
Dec 2022$31.26$31.70$28.53$29.04-6.08%26,100,840
Nov 2022$28.45$33.93$27.09$30.92+9.42%29,795,600
Oct 2022$25.84$28.42$24.57$28.26+9.92%28,347,690
Sep 2022$26.99$28.41$24.84$25.71-5.36%26,825,615
Aug 2022$30.39$30.92$27.13$27.16-11.39%30,703,760
Jul 2022$27.42$31.09$26.29$30.65+12.24%25,717,745
Jun 2022$26.93$28.41$23.71$27.31+1.17%74,221,450
May 2022$27.87$28.41$24.05$26.99-3.09%38,750,580
Apr 2022$32.97$33.82$27.72$27.86-15.56%31,026,220
Mar 2022$31.89$33.99$30.41$32.99+3.89%28,572,975
Feb 2022$27.98$32.72$27.26$31.75+14.07%42,917,770
Jan 2022$33.99$35.29$25.33$27.84-18.03%34,061,215
Dec 2021$37.64$38.23$31.15$33.96-8.06%36,266,190
Nov 2021$35.34$38.58$34.96$36.94+5.13%23,243,155

Seasonality

TTEK return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average0.4%-0.2%-1.4%1.4%2.4%5.1%6.7%2.2%-0.5%5.3%3.0%-4.4%
Months up6 of 104 of 105 of 106 of 106 of 108 of 1010 of 106 of 104 of 107 of 107 of 91 of 9
202612.3%-4.7%-16.0%7.3%-14.7%5.1%14.8%9.2%-8.8%17.3%
2025-7.6%-20.5%0.2%6.6%12.2%2.9%2.2%-0.7%-8.3%-4.2%8.6%-3.3%
2024-5.2%12.3%4.2%5.4%7.7%-2.4%4.3%11.6%-0.8%3.6%-15.0%-4.0%
20237.1%-11.8%7.3%-5.8%-0.5%19.1%3.3%-6.9%-3.4%-0.7%5.0%5.6%
2022-18.0%14.2%3.9%-15.6%-2.9%1.2%12.2%-11.3%-5.4%9.9%9.6%-6.1%
20215.0%14.0%-1.9%-6.0%-6.2%2.2%9.4%7.9%3.8%17.6%5.1%-8.0%
2020-0.6%-5.4%-12.7%6.6%5.1%0.3%12.0%4.3%3.5%5.7%18.3%-2.9%
20196.6%9.0%-0.7%8.6%4.6%16.3%0.8%2.6%7.0%0.8%1.1%-2.4%
20183.2%-1.3%0.0%-1.1%13.8%6.5%3.9%15.0%-2.1%-3.3%-7.5%-15.1%
20171.3%-7.7%1.5%7.6%4.8%-0.4%3.7%-10.0%9.3%5.8%1.7%-3.7%