TETRA TECH INC NEW

Ticker: TTEK CUSIP: 88162G103 Class: EQTY

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 238,074 Value ($000) $7,985 Avg Close $33.82 Range $31.18 - $37.75

Q3 2025

Shares 238,581 Value ($000) $7,964 Avg Close $36.35 Range $32.91 - $38.66

Q2 2025

Shares 238,569 Value ($000) $8,579 Avg Close $33.29 Range $27.27 - $36.67

Q1 2025

Shares 255,898 Value ($000) $7,485 Avg Close $33.56 Range $28.17 - $42.98

Q4 2024

Shares 250,361 Value ($000) $9,974 Avg Close $44.89 Range $39.19 - $51.20

Q3 2024

Shares 253,094 Value ($000) $11,936 Avg Close $44.50 Range $39.43 - $48.26

Q2 2024

Shares 52,195 Value ($000) $10,673 Avg Close $40.77 Range $36.50 - $44.28

Q1 2024

Shares 53,287 Value ($000) $9,843 Avg Close $34.64 Range $31.61 - $38.03

Q4 2023

Shares 56,230 Value ($000) $9,386 Avg Close $31.93 Range $28.67 - $33.99

Q3 2023

Shares 58,868 Value ($000) $8,950 Avg Close $32.50 Range $30.19 - $34.65

Q2 2023

Shares 64,621 Value ($000) $10,581 Avg Close $29.41 Range $26.46 - $33.10

Q1 2023

Shares 66,227 Value ($000) $9,729 Avg Close $28.89 Range $26.24 - $31.92

Q4 2022

Shares 67,508 Value ($000) $9,801 Avg Close $28.91 Range $24.57 - $33.93

Q3 2022

Shares 67,405 Value ($000) $8,664 Avg Close $27.98 Range $24.84 - $31.09

Q2 2022

Shares 69,017 Value ($000) $9,424 Avg Close $27.42 Range $23.71 - $33.82

Q1 2022

Shares 68,960 Value ($000) $11,374 Avg Close $30.77 Range $25.33 - $35.29

Q4 2021

Shares 75,143 Value ($000) $12,759 Avg Close $34.44 Range $29.39 - $38.58

Q3 2021

Shares 73,465 Value ($000) $10,971 Avg Close $27.46 Range $24.08 - $30.91

Q2 2021

Shares 74,337 Value ($000) $9,072 Avg Close $25.16 Range $23.20 - $28.95

Q1 2021

Shares 81,395 Value ($000) $11,047 Avg Close $26.50 Range $22.63 - $28.94

Q4 2020

Shares 81,599 Value ($000) $9,448 Avg Close $22.53 Range $19.06 - $25.44

Q3 2020

Shares 81,656 Value ($000) $7,798 Avg Close $17.77 Range $14.99 - $19.31

Q2 2020

Shares 81,274 Value ($000) $6,430 Avg Close $15.19 Range $12.93 - $17.00

Q1 2020

Shares 82,961 Value ($000) $5,859 Avg Close $17.03 Range $12.72 - $19.87

Q4 2019

Shares 83,372 Value ($000) $7,183 Avg Close $17.32 Range $16.24 - $18.07

Q3 2019

Shares 85,057 Value ($000) $7,380 Avg Close $16.34 Range $14.60 - $17.46

Q2 2019

Shares 84,041 Value ($000) $6,601 Avg Close $13.48 Range $11.77 - $15.78

Q1 2019

Shares 84,888 Value ($000) $5,058 Avg Close $11.21 Range $9.70 - $12.25

Q4 2018

Shares 86,862 Value ($000) $4,497 Avg Close $12.40 Range $9.76 - $14.51

Q3 2018

Shares 84,819 Value ($000) $5,793 Avg Close $13.24 Range $11.60 - $14.44

Q2 2018

Shares 84,849 Value ($000) $4,964 Avg Close $10.68 Range $9.26 - $11.77

Q1 2018

Shares 85,171 Value ($000) $4,169 Avg Close $9.88 Range $8.93 - $10.68

Q4 2017

Shares 88,156 Value ($000) $4,245 Avg Close $9.70 Range $9.21 - $10.18

Q3 2017

Shares 91,594 Value ($000) $4,264 Avg Close $8.79 Range $7.99 - $9.67

Q2 2017

Shares 101,322 Value ($000) $4,635 Avg Close $8.91 Range $7.98 - $9.55

Q1 2017

Shares 113,825 Value ($000) $4,650 Avg Close $8.29 Range $7.77 - $8.97

Q4 2016

Shares 119,225 Value ($000) $5,145 Avg Close $8.08 Range $6.96 - $8.86

Q3 2016

Shares 122,425 Value ($000) $4,342 Avg Close $6.78 Range $6.02 - $7.25

Q2 2016

Shares 121,425 Value ($000) $3,733 Avg Close $5.98 Range $5.60 - $6.35

Q1 2016

Shares 128,054 Value ($000) $3,819 Avg Close $5.32 Range $4.57 - $6.01

Q4 2015

Shares 111,626 Value ($000) $2,905 Avg Close $5.34 Range $4.76 - $5.64

Q3 2015

Shares 109,855 Value ($000) $2,671 Avg Close $5.12 Range $4.82 - $5.50

Q2 2015

Shares 110,055 Value ($000) $2,822 Avg Close $5.12 Range $4.77 - $5.50

Q1 2015

Shares 112,949 Value ($000) $2,713 Avg Close $4.94 Range $4.60 - $5.40

Q4 2014

Shares 121,049 Value ($000) $3,232 Avg Close $5.23 Range $4.74 - $5.57

Q3 2014

Shares 119,936 Value ($000) $2,996 Avg Close $5.21 Range $4.59 - $5.65

Q2 2014

Shares 118,555 Value ($000) $3,260 Avg Close $5.47 Range $5.05 - $6.00

Q1 2014

Shares 118,155 Value ($000) $3,496 Avg Close $5.82 Range $5.47 - $6.18

Q4 2013

Shares 117,555 Value ($000) $3,289 Avg Close $5.40 Range $4.77 - $6.00

Q3 2013

Shares 116,755 Value ($000) $3,023 Avg Close $4.79 Range $4.44 - $5.21

Q2 2013

Shares 113,142 Value ($000) $2,660 Avg Close $5.31 Range $4.51 - $6.11

Q1 2013

Shares 110,261 Value ($000) $3,362 Avg Close $5.85 Range $5.32 - $6.30

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	238,074	$7,985	$33.82	$31.18 - $37.75
Q3 2025	238,581	$7,964	$36.35	$32.91 - $38.66
Q2 2025	238,569	$8,579	$33.29	$27.27 - $36.67
Q1 2025	255,898	$7,485	$33.56	$28.17 - $42.98
Q4 2024	250,361	$9,974	$44.89	$39.19 - $51.20
Q3 2024	253,094	$11,936	$44.50	$39.43 - $48.26
Q2 2024	52,195	$10,673	$40.77	$36.50 - $44.28
Q1 2024	53,287	$9,843	$34.64	$31.61 - $38.03
Q4 2023	56,230	$9,386	$31.93	$28.67 - $33.99
Q3 2023	58,868	$8,950	$32.50	$30.19 - $34.65
Q2 2023	64,621	$10,581	$29.41	$26.46 - $33.10
Q1 2023	66,227	$9,729	$28.89	$26.24 - $31.92
Q4 2022	67,508	$9,801	$28.91	$24.57 - $33.93
Q3 2022	67,405	$8,664	$27.98	$24.84 - $31.09
Q2 2022	69,017	$9,424	$27.42	$23.71 - $33.82
Q1 2022	68,960	$11,374	$30.77	$25.33 - $35.29
Q4 2021	75,143	$12,759	$34.44	$29.39 - $38.58
Q3 2021	73,465	$10,971	$27.46	$24.08 - $30.91
Q2 2021	74,337	$9,072	$25.16	$23.20 - $28.95
Q1 2021	81,395	$11,047	$26.50	$22.63 - $28.94
Q4 2020	81,599	$9,448	$22.53	$19.06 - $25.44
Q3 2020	81,656	$7,798	$17.77	$14.99 - $19.31
Q2 2020	81,274	$6,430	$15.19	$12.93 - $17.00
Q1 2020	82,961	$5,859	$17.03	$12.72 - $19.87
Q4 2019	83,372	$7,183	$17.32	$16.24 - $18.07
Q3 2019	85,057	$7,380	$16.34	$14.60 - $17.46
Q2 2019	84,041	$6,601	$13.48	$11.77 - $15.78
Q1 2019	84,888	$5,058	$11.21	$9.70 - $12.25
Q4 2018	86,862	$4,497	$12.40	$9.76 - $14.51
Q3 2018	84,819	$5,793	$13.24	$11.60 - $14.44
Q2 2018	84,849	$4,964	$10.68	$9.26 - $11.77
Q1 2018	85,171	$4,169	$9.88	$8.93 - $10.68
Q4 2017	88,156	$4,245	$9.70	$9.21 - $10.18
Q3 2017	91,594	$4,264	$8.79	$7.99 - $9.67
Q2 2017	101,322	$4,635	$8.91	$7.98 - $9.55
Q1 2017	113,825	$4,650	$8.29	$7.77 - $8.97
Q4 2016	119,225	$5,145	$8.08	$6.96 - $8.86
Q3 2016	122,425	$4,342	$6.78	$6.02 - $7.25
Q2 2016	121,425	$3,733	$5.98	$5.60 - $6.35
Q1 2016	128,054	$3,819	$5.32	$4.57 - $6.01
Q4 2015	111,626	$2,905	$5.34	$4.76 - $5.64
Q3 2015	109,855	$2,671	$5.12	$4.82 - $5.50
Q2 2015	110,055	$2,822	$5.12	$4.77 - $5.50
Q1 2015	112,949	$2,713	$4.94	$4.60 - $5.40
Q4 2014	121,049	$3,232	$5.23	$4.74 - $5.57
Q3 2014	119,936	$2,996	$5.21	$4.59 - $5.65
Q2 2014	118,555	$3,260	$5.47	$5.05 - $6.00
Q1 2014	118,155	$3,496	$5.82	$5.47 - $6.18
Q4 2013	117,555	$3,289	$5.40	$4.77 - $6.00
Q3 2013	116,755	$3,023	$4.79	$4.44 - $5.21
Q2 2013	113,142	$2,660	$5.31	$4.51 - $6.11
Q1 2013	110,261	$3,362	$5.85	$5.32 - $6.30