PCM
UCTT

Portolan Capital Management’s Ultra Clean Holdings UCTT Stock Holding History

Portolan Capital 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
Q2 		$3.54M Sell
24,831
-8,869
-26% -$781K 0.13% 128
2026
Q1 		$2.1M Buy
+33,700
New +$1.73M 0.11% 125
2024
Q2 		– Sell
-99,992
Closed -$4.59M – 134
2024
Q1 		$4.59M Buy
+99,992
New +$4.06M 0.35% 89

Other funds holding UCTT

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Portolan Capital Management's UCTT Position: Q2 2026 in Review

Portolan Capital Management reduced its Ultra Clean Holdings (UCTT) stake by 26% in Q2 2026, selling an estimated $781K and leaving 24,831 shares worth $3.54M. The position accounts for 0.13% of the portfolio, ranked #128.

Portolan Capital Management first reported a position in UCTT in Q1 2024 and has held it in 3 quarters since. The position peaked at $4.59M in Q1 2024. 438 funds tracked by Wall St. Rank hold UCTT as of Q2 2026.

  • Portolan Capital Management held 24,831 shares of Ultra Clean Holdings worth $3.54M as of Q2 2026.
  • Portolan Capital Management sold 8,869 Ultra Clean Holdings shares in Q2 2026, an estimated $781K.
  • Ultra Clean Holdings made up 0.13% of Portolan Capital Management's portfolio in Q2 2026, its #128 holding.
  • Portolan Capital Management first reported a position in Ultra Clean Holdings in Q1 2024 and has held it in 3 quarters since.
  • Portolan Capital Management's Ultra Clean Holdings position peaked at $4.59M in Q1 2024.
  • 438 funds tracked by Wall St. Rank held Ultra Clean Holdings as of Q2 2026.

Based on Portolan Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.