State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s Tetra Tech TTEK Stock Holding History

State of Wisconsin Investment Board’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 		$9M Sell
298,905
-16,928
-5% -$598K 0.02% 719
2025
Q4 		$10.6M Buy
315,833
+1,419
+0.5% +$48K 0.02% 647
2025
Q3 		$10.5M Sell
314,414
-2,460
-0.8% -$89.4K 0.02% 619
2025
Q2 		$11.4M Sell
316,874
-52,619
-14% -$1.75M 0.03% 580
2025
Q1 		$10.8M Buy
369,493
+27,591
+8% +$926K 0.03% 592
2024
Q4 		$13.6M Sell
341,902
-8,628
-2% -$387K 0.03% 484
2024
Q3 		$16.5M Buy
350,530
+22,845
+7% +$1.02M 0.04% 417
2024
Q2 		$13.4M Sell
327,685
-12,585
-4% -$513K 0.04% 457
2024
Q1 		$12.6M Sell
340,270
-44,580
-12% -$1.54M 0.03% 506
2023
Q4 		$12.8M Buy
384,850
+26,415
+7% +$844K 0.04% 482
2023
Q3 		$10.9M Sell
358,435
-20,775
-5% -$675K 0.03% 520
2023
Q2 		$12.4M Sell
379,210
-10,325
-3% -$304K 0.03% 504
2023
Q1 		$11.4M Sell
389,535
-47,195
-11% -$1.36M 0.03% 518
2022
Q4 		$12.7M Sell
436,730
-16,520
-4% -$478K 0.04% 455
2022
Q3 		$11.7M Sell
453,250
-17,440
-4% -$488K 0.04% 490
2022
Q2 		$12.9M Sell
470,690
-582,060
-55% -$16M 0.03% 519
2022
Q1 		$34.7M Hold
1,052,750
– – 0.07% 281
2021
Q4 		$35.8M Hold
1,052,750
– – 0.07% 301
2021
Q3 		$31.4M Hold
1,052,750
– – 0.07% 330
2021
Q2 		$25.7M Hold
1,052,750
– – 0.05% 374
2021
Q1 		$28.6M Hold
1,052,750
– – 0.06% 339
2020
Q4 		$24.4M Sell
1,052,750
-131,000
-11% -$2.95M 0.06% 355
2020
Q3 		$22.6M Hold
1,183,750
– – 0.06% 345
2020
Q2 		$18.7M Hold
1,183,750
– – 0.05% 363
2020
Q1 		$16.7M Hold
1,183,750
– – 0.06% 349
2019
Q4 		$20.4M Hold
1,183,750
– – 0.05% 387
2019
Q3 		$20.5M Hold
1,183,750
– – 0.06% 349
2019
Q2 		$18.6M Buy
1,183,750
+13,250
+1% +$179K 0.05% 386
2019
Q1 		$13.9M Buy
1,170,500
+241,000
+26% +$2.7M 0.04% 489
2018
Q4 		$9.62M Hold
929,500
– – 0.03% 546
2018
Q3 		$12.7M Sell
929,500
-85,000
-8% -$1.13M 0.04% 533
2018
Q2 		$11.9M Hold
1,014,500
– – 0.03% 565
2018
Q1 		$9.93M Hold
1,014,500
– – 0.03% 630
2017
Q4 		$9.77M Hold
1,014,500
– – 0.03% 641
2017
Q3 		$9.45M Hold
1,014,500
– – 0.03% 621
2017
Q2 		$9.28M Sell
1,014,500
-85,500
-8% -$761K 0.03% 593
2017
Q1 		$8.99M Buy
1,100,000
+378,650
+52% +$3.14M 0.03% 555
2016
Q4 		$6.22M Buy
+721,350
New +$5.83M 0.03% 652
2014
Q3 		– Sell
-90,000
Closed -$495K – 1346
2014
Q2 		$495K Buy
+90,000
New +$493K ﹤0.01% 1316

Other funds holding TTEK

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Capital International Investors
Capital International Investors Los Angeles, California $427B AUM 29.17% 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 $131B AUM 28.36% 1-Year Est. Return
Sands Capital Management
Sands Capital Management Arlington, Virginia $25.5B AUM 26.46% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Fidelity International
Fidelity International Hamilton, Bermuda $129B AUM 30.83% 1-Year Est. Return

State of Wisconsin Investment Board's TTEK Position: Q1 2026 in Review

State of Wisconsin Investment Board reduced its Tetra Tech (TTEK) stake by 5.4% in Q1 2026, selling an estimated $598K and leaving 298,905 shares worth $9M. The position accounts for 0.02% of the portfolio, ranked #719.

State of Wisconsin Investment Board first reported a position in TTEK in Q2 2014 and has held it in 39 quarters since. The position peaked at $35.8M in Q4 2021. 589 funds tracked by Wall St. Rank hold TTEK as of Q1 2026.

  • State of Wisconsin Investment Board held 298,905 shares of Tetra Tech worth $9M as of Q1 2026.
  • State of Wisconsin Investment Board sold 16,928 Tetra Tech shares in Q1 2026, an estimated $598K.
  • Tetra Tech made up 0.02% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #719 holding.
  • State of Wisconsin Investment Board first reported a position in Tetra Tech in Q2 2014 and has held it in 39 quarters since.
  • State of Wisconsin Investment Board's Tetra Tech position peaked at $35.8M in Q4 2021.
  • 589 funds tracked by Wall St. Rank held Tetra Tech as of Q1 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.