ULTRA CLEAN HLDGS INC

Ticker: UCTT CUSIP: 90385V107 Class: Common Stock

FRONTIER CAPITAL MANAGEMENT CO LLC's Holding History (CIK: 0000351173)

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

Q4 2025

Shares 3,509,839 Value ($000) $88,904 Avg Close $26.60 Range $21.49 - $31.11

Q3 2025

Shares 3,033,270 Value ($000) $82,657 Avg Close $24.59 Range $21.28 - $29.72

Q2 2025

Shares 2,754,163 Value ($000) $62,161 Avg Close $20.53 Range $16.66 - $23.22

Q1 2025

Shares 1,945,886 Value ($000) $41,661 Avg Close $31.93 Range $20.86 - $40.10

Q4 2024

Shares 2,130,106 Value ($000) $76,577 Avg Close $36.98 Range $32.08 - $41.84

Q3 2024

Shares 2,178,184 Value ($000) $86,975 Avg Close $41.01 Range $32.33 - $56.47

Q2 2024

Shares 3,002,601 Value ($000) $147,127 Avg Close $44.88 Range $38.16 - $50.51

Q1 2024

Shares 2,868,118 Value ($000) $131,761 Avg Close $40.62 Range $31.01 - $49.25

Q4 2023

Shares 2,559,943 Value ($000) $87,396 Avg Close $27.80 Range $22.15 - $35.54

Q3 2023

Shares 1,861,701 Value ($000) $55,237 Avg Close $33.70 Range $28.04 - $40.80

Q2 2023

Shares 1,599,272 Value ($000) $61,508 Avg Close $32.18 Range $26.59 - $39.15

Q1 2023

Shares 1,071,283 Value ($000) $35,524 Avg Close $33.07 Range $29.01 - $38.84

Q4 2022

Shares 608,579 Value ($000) $20,174 Avg Close $31.89 Range $23.32 - $39.10

Q4 2020

Shares 521,078 Value ($000) $16,232 Avg Close $27.90 Range $21.08 - $37.02

Q3 2020

Shares 995,973 Value ($000) $21,374 Avg Close $24.28 Range $19.08 - $31.10

Q2 2020

Shares 1,365,239 Value ($000) $30,895 Avg Close $19.01 Range $12.37 - $24.86

Q1 2020

Shares 1,603,391 Value ($000) $22,127 Avg Close $21.23 Range $11.79 - $30.00

Q4 2019

Shares 1,871,171 Value ($000) $43,916 Avg Close $20.22 Range $13.94 - $24.24

Q3 2019

Shares 2,308,494 Value ($000) $33,785 Avg Close $13.88 Range $11.20 - $16.67

Q2 2019

Shares 1,878,581 Value ($000) $26,150 Avg Close $12.74 Range $10.50 - $14.82

Q1 2019

Shares 1,879,990 Value ($000) $19,458 Avg Close $10.73 Range $8.10 - $13.12

Q4 2018

Shares 1,166,713 Value ($000) $9,882 Avg Close $9.78 Range $6.94 - $13.00

Q3 2018

Shares 78,933 Value ($000) $991 Avg Close $14.54 Range $12.28 - $17.35

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,509,839	$88,904	$26.60	$21.49 - $31.11
Q3 2025	3,033,270	$82,657	$24.59	$21.28 - $29.72
Q2 2025	2,754,163	$62,161	$20.53	$16.66 - $23.22
Q1 2025	1,945,886	$41,661	$31.93	$20.86 - $40.10
Q4 2024	2,130,106	$76,577	$36.98	$32.08 - $41.84
Q3 2024	2,178,184	$86,975	$41.01	$32.33 - $56.47
Q2 2024	3,002,601	$147,127	$44.88	$38.16 - $50.51
Q1 2024	2,868,118	$131,761	$40.62	$31.01 - $49.25
Q4 2023	2,559,943	$87,396	$27.80	$22.15 - $35.54
Q3 2023	1,861,701	$55,237	$33.70	$28.04 - $40.80
Q2 2023	1,599,272	$61,508	$32.18	$26.59 - $39.15
Q1 2023	1,071,283	$35,524	$33.07	$29.01 - $38.84
Q4 2022	608,579	$20,174	$31.89	$23.32 - $39.10
Q4 2020	521,078	$16,232	$27.90	$21.08 - $37.02
Q3 2020	995,973	$21,374	$24.28	$19.08 - $31.10
Q2 2020	1,365,239	$30,895	$19.01	$12.37 - $24.86
Q1 2020	1,603,391	$22,127	$21.23	$11.79 - $30.00
Q4 2019	1,871,171	$43,916	$20.22	$13.94 - $24.24
Q3 2019	2,308,494	$33,785	$13.88	$11.20 - $16.67
Q2 2019	1,878,581	$26,150	$12.74	$10.50 - $14.82
Q1 2019	1,879,990	$19,458	$10.73	$8.10 - $13.12
Q4 2018	1,166,713	$9,882	$9.78	$6.94 - $13.00
Q3 2018	78,933	$991	$14.54	$12.28 - $17.35