TETRA TECH INC NEW

Ticker: TTEK CUSIP: 88162G103 Class: EQTY

WHITTIER TRUST CO's Holding History (CIK: 0001137881)

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

Q4 2025

Shares 32,915 Value ($000) $1,144 Avg Close $33.82 Range $31.18 - $37.75

Q3 2025

Shares 32,915 Value ($000) $1,111 Avg Close $36.35 Range $32.91 - $38.66

Q2 2025

Shares 32,915 Value ($000) $1,183 Avg Close $33.29 Range $27.27 - $36.67

Q1 2025

Shares 32,915 Value ($000) $963 Avg Close $33.56 Range $28.17 - $42.98

Q4 2024

Shares 34,165 Value ($000) $1,361 Avg Close $44.89 Range $39.19 - $51.20

Q3 2024

Shares 34,915 Value ($000) $1,646 Avg Close $44.50 Range $39.43 - $48.26

Q2 2024

Shares 6,833 Value ($000) $1,397 Avg Close $40.77 Range $36.50 - $44.28

Q1 2024

Shares 6,833 Value ($000) $1,262 Avg Close $34.64 Range $31.61 - $38.03

Q4 2023

Shares 6,833 Value ($000) $1,141 Avg Close $31.93 Range $28.67 - $33.99

Q3 2023

Shares 6,833 Value ($000) $1,039 Avg Close $32.50 Range $30.19 - $34.65

Q2 2023

Shares 6,833 Value ($000) $1,119 Avg Close $29.41 Range $26.46 - $33.10

Q1 2023

Shares 6,833 Value ($000) $1,004 Avg Close $28.89 Range $26.24 - $31.92

Q4 2022

Shares 6,833 Value ($000) $992 Avg Close $28.91 Range $24.57 - $33.93

Q3 2022

Shares 6,833 Value ($000) $878 Avg Close $27.98 Range $24.84 - $31.09

Q2 2022

Shares 6,583 Value ($000) $899 Avg Close $27.42 Range $23.71 - $33.82

Q1 2022

Shares 6,583 Value ($000) $1,086 Avg Close $30.77 Range $25.33 - $35.29

Q4 2021

Shares 6,583 Value ($000) $1,118 Avg Close $34.44 Range $29.39 - $38.58

Q3 2021

Shares 6,583 Value ($000) $983 Avg Close $27.46 Range $24.08 - $30.91

Q2 2021

Shares 6,583 Value ($000) $804 Avg Close $25.16 Range $23.20 - $28.95

Q1 2021

Shares 6,351 Value ($000) $861 Avg Close $26.50 Range $22.63 - $28.94

Q4 2020

Shares 6,351 Value ($000) $735 Avg Close $22.53 Range $19.06 - $25.44

Q3 2020

Shares 6,351 Value ($000) $606 Avg Close $17.77 Range $14.99 - $19.31

Q2 2020

Shares 6,351 Value ($000) $503 Avg Close $15.19 Range $12.93 - $17.00

Q1 2020

Shares 6,351 Value ($000) $449 Avg Close $17.03 Range $12.72 - $19.87

Q4 2019

Shares 6,351 Value ($000) $547 Avg Close $17.32 Range $16.24 - $18.07

Q3 2019

Shares 6,351 Value ($000) $551 Avg Close $16.34 Range $14.60 - $17.46

Q2 2019

Shares 6,270 Value ($000) $492 Avg Close $13.48 Range $11.77 - $15.78

Q1 2019

Shares 6,270 Value ($000) $373 Avg Close $11.21 Range $9.70 - $12.25

Q4 2018

Shares 6,270 Value ($000) $325 Avg Close $12.40 Range $9.76 - $14.51

Q3 2018

Shares 6,270 Value ($000) $428 Avg Close $13.24 Range $11.60 - $14.44

Q2 2018

Shares 6,270 Value ($000) $367 Avg Close $10.68 Range $9.26 - $11.77

Q1 2018

Shares 6,270 Value ($000) $306 Avg Close $9.88 Range $8.93 - $10.68

Q4 2017

Shares 6,270 Value ($000) $302 Avg Close $9.70 Range $9.21 - $10.18

Q3 2017

Shares 6,270 Value ($000) $292 Avg Close $8.79 Range $7.99 - $9.67

Q2 2017

Shares 6,270 Value ($000) $287 Avg Close $8.91 Range $7.98 - $9.55

Q1 2017

Shares 6,270 Value ($000) $256 Avg Close $8.29 Range $7.77 - $8.97

Q4 2016

Shares 6,270 Value ($000) $271 Avg Close $8.08 Range $6.96 - $8.86

Q3 2016

Shares 6,270 Value ($000) $222 Avg Close $6.78 Range $6.02 - $7.25

Q2 2016

Shares 6,270 Value ($000) $193 Avg Close $5.98 Range $5.60 - $6.35

Q1 2016

Shares 7,170 Value ($000) $214 Avg Close $5.32 Range $4.57 - $6.01

Q4 2015

Shares 7,170 Value ($000) $186 Avg Close $5.34 Range $4.76 - $5.64

Q3 2015

Shares 7,170 Value ($000) $175 Avg Close $5.12 Range $4.82 - $5.50

Q2 2015

Shares 7,100 Value ($000) $182 Avg Close $5.12 Range $4.77 - $5.50

Q1 2015

Shares 7,100 Value ($000) $171 Avg Close $4.94 Range $4.60 - $5.40

Q4 2014

Shares 6,200 Value ($000) $166 Avg Close $5.23 Range $4.74 - $5.57

Q3 2014

Shares 6,200 Value ($000) $155 Avg Close $5.21 Range $4.59 - $5.65

Q2 2014

Shares 6,200 Value ($000) $171 Avg Close $5.47 Range $5.05 - $6.00

Q1 2014

Shares 6,200 Value ($000) $183 Avg Close $5.82 Range $5.47 - $6.18

Q4 2013

Shares 6,200 Value ($000) $173 Avg Close $5.40 Range $4.77 - $6.00

Q3 2013

Shares 6,200 Value ($000) $160 Avg Close $4.79 Range $4.44 - $5.21

Q2 2013

Shares 6,200 Value ($000) $146 Avg Close $5.31 Range $4.51 - $6.11

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	32,915	$1,144	$33.82	$31.18 - $37.75
Q3 2025	32,915	$1,111	$36.35	$32.91 - $38.66
Q2 2025	32,915	$1,183	$33.29	$27.27 - $36.67
Q1 2025	32,915	$963	$33.56	$28.17 - $42.98
Q4 2024	34,165	$1,361	$44.89	$39.19 - $51.20
Q3 2024	34,915	$1,646	$44.50	$39.43 - $48.26
Q2 2024	6,833	$1,397	$40.77	$36.50 - $44.28
Q1 2024	6,833	$1,262	$34.64	$31.61 - $38.03
Q4 2023	6,833	$1,141	$31.93	$28.67 - $33.99
Q3 2023	6,833	$1,039	$32.50	$30.19 - $34.65
Q2 2023	6,833	$1,119	$29.41	$26.46 - $33.10
Q1 2023	6,833	$1,004	$28.89	$26.24 - $31.92
Q4 2022	6,833	$992	$28.91	$24.57 - $33.93
Q3 2022	6,833	$878	$27.98	$24.84 - $31.09
Q2 2022	6,583	$899	$27.42	$23.71 - $33.82
Q1 2022	6,583	$1,086	$30.77	$25.33 - $35.29
Q4 2021	6,583	$1,118	$34.44	$29.39 - $38.58
Q3 2021	6,583	$983	$27.46	$24.08 - $30.91
Q2 2021	6,583	$804	$25.16	$23.20 - $28.95
Q1 2021	6,351	$861	$26.50	$22.63 - $28.94
Q4 2020	6,351	$735	$22.53	$19.06 - $25.44
Q3 2020	6,351	$606	$17.77	$14.99 - $19.31
Q2 2020	6,351	$503	$15.19	$12.93 - $17.00
Q1 2020	6,351	$449	$17.03	$12.72 - $19.87
Q4 2019	6,351	$547	$17.32	$16.24 - $18.07
Q3 2019	6,351	$551	$16.34	$14.60 - $17.46
Q2 2019	6,270	$492	$13.48	$11.77 - $15.78
Q1 2019	6,270	$373	$11.21	$9.70 - $12.25
Q4 2018	6,270	$325	$12.40	$9.76 - $14.51
Q3 2018	6,270	$428	$13.24	$11.60 - $14.44
Q2 2018	6,270	$367	$10.68	$9.26 - $11.77
Q1 2018	6,270	$306	$9.88	$8.93 - $10.68
Q4 2017	6,270	$302	$9.70	$9.21 - $10.18
Q3 2017	6,270	$292	$8.79	$7.99 - $9.67
Q2 2017	6,270	$287	$8.91	$7.98 - $9.55
Q1 2017	6,270	$256	$8.29	$7.77 - $8.97
Q4 2016	6,270	$271	$8.08	$6.96 - $8.86
Q3 2016	6,270	$222	$6.78	$6.02 - $7.25
Q2 2016	6,270	$193	$5.98	$5.60 - $6.35
Q1 2016	7,170	$214	$5.32	$4.57 - $6.01
Q4 2015	7,170	$186	$5.34	$4.76 - $5.64
Q3 2015	7,170	$175	$5.12	$4.82 - $5.50
Q2 2015	7,100	$182	$5.12	$4.77 - $5.50
Q1 2015	7,100	$171	$4.94	$4.60 - $5.40
Q4 2014	6,200	$166	$5.23	$4.74 - $5.57
Q3 2014	6,200	$155	$5.21	$4.59 - $5.65
Q2 2014	6,200	$171	$5.47	$5.05 - $6.00
Q1 2014	6,200	$183	$5.82	$5.47 - $6.18
Q4 2013	6,200	$173	$5.40	$4.77 - $6.00
Q3 2013	6,200	$160	$4.79	$4.44 - $5.21
Q2 2013	6,200	$146	$5.31	$4.51 - $6.11