Janus Henderson Group
TTEK icon

Janus Henderson Group’s Tetra Tech TTEK Stock Holding History

Janus Henderson Group’s Portfolio TTEK Stock Details TTEK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$31M Sell
1,029,853
-931,437
-47% -$32.9M 0.01% 509
2025
Q4 		$65.8M Buy
1,961,290
+188,426
+11% +$6.37M 0.03% 365
2025
Q3 		$59.2M Buy
1,772,864
+1,665,639
+1,553% +$60.5M 0.03% 377
2025
Q2 		$3.85M Sell
107,225
-140,243
-57% -$4.67M ﹤0.01% 987
2025
Q1 		$7.21M Buy
247,468
+38,795
+19% +$1.3M ﹤0.01% 780
2024
Q4 		$8.31M Sell
208,673
-4,450
-2% -$200K ﹤0.01% 769
2024
Q3 		$10M Buy
213,123
+1,788
+0.8% +$79.6K 0.01% 686
2024
Q2 		$8.64M Buy
211,335
+4,025
+2% +$164K ﹤0.01% 697
2024
Q1 		$7.66M Sell
207,310
-1,920
-0.9% -$66.5K ﹤0.01% 754
2023
Q4 		$6.99M Buy
209,230
+87,300
+72% +$2.79M ﹤0.01% 733
2023
Q3 		$3.71M Buy
121,930
+5
+0% +$162 ﹤0.01% 904
2023
Q2 		$3.99M Sell
121,925
-130
-0.1% -$3.82K ﹤0.01% 926
2023
Q1 		$3.59M Buy
122,055
+71,410
+141% +$2.06M ﹤0.01% 984
2022
Q4 		$1.47M Buy
+50,645
New +$1.46M ﹤0.01% 1198
2022
Q3 		– Sell
-49,180
Closed -$1.34M – 2538
2022
Q2 		$1.34M Sell
49,180
-5,865
-11% -$161K ﹤0.01% 1194
2022
Q1 		$1.82M Buy
55,045
+5
+0% +$154 ﹤0.01% 1262
2021
Q4 		$1.87M Buy
55,040
+27,675
+101% +$953K ﹤0.01% 1283
2021
Q3 		$818K Buy
+27,365
New +$751K ﹤0.01% 1423
2018
Q3 		– Sell
-500,000
Closed -$5.85M – 1474
2018
Q2 		$5.85M Hold
500,000
– – ﹤0.01% 1000
2018
Q1 		$4.89M Sell
500,000
-486,230
-49% -$4.8M ﹤0.01% 1010
2017
Q4 		$9.49M Buy
+986,230
New +$9.57M 0.01% 880
2017
Q3 		– Sell
-965,830
Closed -$8.83M – 1332
2017
Q2 		$8.83M Buy
965,830
+705,330
+271% +$6.28M 0.01% 897
2017
Q1 		$2.13M Buy
+260,500
New +$2.16M 0.02% 488

Other funds holding TTEK

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
Pictet Asset Management
Pictet Asset Management Carouge, Switzerland $105B AUM 38.07% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
Sands Capital Management
Sands Capital Management Arlington, Virginia $26.9B AUM 34.44% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Fidelity International
Fidelity International Hamilton, Bermuda $139B AUM 29.06% 1-Year Est. Return

Janus Henderson Group's TTEK Position: Q1 2026 in Review

Janus Henderson Group reduced its Tetra Tech (TTEK) stake by 47% in Q1 2026, selling an estimated $32.9M and leaving 1,029,853 shares worth $31M. The position accounts for 0.01% of the portfolio, ranked #509.

Janus Henderson Group first reported a position in TTEK in Q1 2017 and has held it in 23 quarters since. The position peaked at $65.8M in Q4 2025. 592 funds tracked by Wall St. Rank hold TTEK as of Q1 2026.

  • Janus Henderson Group held 1,029,853 shares of Tetra Tech worth $31M as of Q1 2026.
  • Janus Henderson Group sold 931,437 Tetra Tech shares in Q1 2026, an estimated $32.9M.
  • Tetra Tech made up 0.01% of Janus Henderson Group's portfolio in Q1 2026, its #509 holding.
  • Janus Henderson Group first reported a position in Tetra Tech in Q1 2017 and has held it in 23 quarters since.
  • Janus Henderson Group's Tetra Tech position peaked at $65.8M in Q4 2025.
  • 592 funds tracked by Wall St. Rank held Tetra Tech as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.