ULTRA CLEAN HLDGS INC

Ticker: UCTT CUSIP: 90385V107 Class: Common Stock

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q1 2019

Shares 47,450 Value ($000) $491 Avg Close $10.73 Range $8.10 - $13.12

Q4 2018

Shares 1,157,993 Value ($000) $9,808 Avg Close $9.78 Range $6.94 - $13.00

Q3 2018

Shares 1,011,698 Value ($000) $12,697 Avg Close $14.54 Range $12.28 - $17.35

Q2 2018

Shares 890,283 Value ($000) $14,779 Avg Close $17.54 Range $15.36 - $19.59

Q1 2018

Shares 805,616 Value ($000) $15,508 Avg Close $21.09 Range $16.29 - $27.20

Q4 2017

Shares 494,075 Value ($000) $11,408 Avg Close $25.63 Range $18.86 - $34.59

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2019	47,450	$491	$10.73	$8.10 - $13.12
Q4 2018	1,157,993	$9,808	$9.78	$6.94 - $13.00
Q3 2018	1,011,698	$12,697	$14.54	$12.28 - $17.35
Q2 2018	890,283	$14,779	$17.54	$15.36 - $19.59
Q1 2018	805,616	$15,508	$21.09	$16.29 - $27.20
Q4 2017	494,075	$11,408	$25.63	$18.86 - $34.59