OAM
UCTT

Oberweis Asset Management’s Ultra Clean Holdings UCTT Stock Holding History

Oberweis Asset Management’s Portfolio UCTT Stock Details UCTT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$39.8M Buy
640,476
+11,976
+2% +$614K 1.18% 13
2025
Q4 		$15.9M Buy
628,500
+15,200
+2% +$404K 0.58% 64
2025
Q3 		$16.7M Hold
613,300
– – 0.64% 61
2025
Q2 		$13.8M Hold
613,300
– – 0.6% 66
2025
Q1 		$13.1M Hold
613,300
– – 0.65% 58
2024
Q4 		$22M Buy
613,300
+173,200
+39% +$6.4M 1.04% 17
2024
Q3 		$17.6M Buy
440,100
+120,500
+38% +$4.94M 0.9% 29
2024
Q2 		$15.7M Hold
319,600
– – 0.96% 27
2024
Q1 		$14.7M Buy
319,600
+72,500
+29% +$2.95M 1.06% 17
2023
Q4 		$8.44M Buy
247,100
+29,000
+13% +$806K 0.79% 25
2023
Q3 		$6.47M Buy
218,100
+47,200
+28% +$1.59M 0.69% 37
2023
Q2 		$6.57M Buy
170,900
+38,200
+29% +$1.23M 0.8% 26
2023
Q1 		$4.4M Buy
132,700
+64,800
+95% +$2.14M 0.68% 33
2022
Q4 		$2.25M Sell
67,900
-24,740
-27% -$789K 0.48% 55
2022
Q3 		$2.38M Sell
92,640
-18,500
-17% -$566K 0.56% 35
2022
Q2 		$3.31M Sell
111,140
-49,000
-31% -$1.59M 0.84% 19
2022
Q1 		$6.79M Buy
160,140
+18,510
+13% +$886K 1.36% 10
2021
Q4 		$8.12M Buy
141,630
+52,150
+58% +$2.71M 1.48% 9
2021
Q3 		$3.81M Buy
89,480
+2,900
+3% +$137K 0.79% 18
2021
Q2 		$4.65M Buy
86,580
+6,370
+8% +$341K 1.02% 17
2021
Q1 		$4.66M Buy
80,210
+43,210
+117% +$1.99M 0.95% 17
2020
Q4 		$1.15M Sell
37,000
-2,100
-5% -$58.6K 0.3% 51
2020
Q3 		$839K Sell
39,100
-18,400
-32% -$447K 0.28% 57
2020
Q2 		$1.3M Buy
57,500
+1,200
+2% +$22.8K 0.51% 38
2020
Q1 		$777K Buy
56,300
+4,000
+8% +$84.9K 0.43% 48
2019
Q4 		$1.23M Buy
+52,300
New +$1.06M 0.41% 48
2017
Q2 		– Sell
-79,600
Closed -$1.34M – 152
2017
Q1 		$1.34M Sell
79,600
-40,200
-34% -$534K 0.4% 57
2016
Q4 		$1.16M Sell
119,800
-3,200
-3% -$29.1K 0.35% 54
2016
Q3 		$911K Hold
123,000
– – 0.26% 62
2016
Q2 		$700K Buy
123,000
+26,000
+27% +$143K 0.21% 70
2016
Q1 		$520K Buy
97,000
+13,400
+16% +$67.9K 0.15% 109
2015
Q4 		$428K Buy
83,600
+29,100
+53% +$151K 0.12% 136
2015
Q3 		$313K Buy
+54,500
New +$360K 0.09% 134

Other funds holding UCTT

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $9.73B AUM 55.65% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $95.5B AUM 28.4% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $13.6B AUM 173.98% 1-Year Est. Return

Oberweis Asset Management's UCTT Position: Q1 2026 in Review

Oberweis Asset Management increased its Ultra Clean Holdings (UCTT) stake by 1.9% in Q1 2026, buying an estimated $614K and bringing the position to 640,476 shares worth $39.8M. The position accounts for 1.18% of the portfolio, ranked #13.

Oberweis Asset Management first reported a position in UCTT in Q3 2015 and has held it in 33 quarters since. 331 funds tracked by Wall St. Rank hold UCTT as of Q1 2026.

  • Oberweis Asset Management held 640,476 shares of Ultra Clean Holdings worth $39.8M as of Q1 2026.
  • Oberweis Asset Management bought 11,976 Ultra Clean Holdings shares in Q1 2026, an estimated $614K.
  • Ultra Clean Holdings made up 1.18% of Oberweis Asset Management's portfolio in Q1 2026, its #13 holding.
  • Oberweis Asset Management first reported a position in Ultra Clean Holdings in Q3 2015 and has held it in 33 quarters since.
  • 331 funds tracked by Wall St. Rank held Ultra Clean Holdings as of Q1 2026.

Based on Oberweis Asset Management's 13F filing for Q1 2026, filed 15 May 2026.