Boston Partners
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Boston Partners’s United Microelectronic UMC Stock Holding History

Boston Partners’s Portfolio UMC Stock Details UMC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$3.25M Buy
+119,435
New +$2.04M ﹤0.01% 544
2024
Q4 		– Sell
-633,615
Closed -$5.34M – 766
2024
Q3 		$5.34M Buy
+633,615
New +$5.3M 0.01% 437

Other funds holding UMC

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BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Rafferty Asset Management
Rafferty Asset Management New York $43.9B AUM 121.74% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
Man Group
Man Group London, United Kingdom $62.7B AUM 29.77% 1-Year Est. Return

Boston Partners's UMC Position: Q2 2026 in Review

Boston Partners opened a new position in United Microelectronic (UMC) in Q2 2026: 119,435 shares worth $3.25M. The stake represents ﹤0.01% of the portfolio and ranks #544 among its holdings. This is a return to the name: Boston Partners previously reported a position in UMC as recently as Q3 2024.

Boston Partners first reported a position in UMC in Q3 2024 and has held it in 2 quarters since. The position peaked at $5.34M in Q3 2024. 364 funds tracked by Wall St. Rank hold UMC as of Q2 2026.

  • Boston Partners held 119,435 shares of United Microelectronic worth $3.25M as of Q2 2026.
  • United Microelectronic was a new Boston Partners position in Q2 2026.
  • United Microelectronic made up ﹤0.01% of Boston Partners's portfolio in Q2 2026, its #544 holding.
  • Boston Partners first reported a position in United Microelectronic in Q3 2024 and has held it in 2 quarters since.
  • Boston Partners's United Microelectronic position peaked at $5.34M in Q3 2024.
  • 364 funds tracked by Wall St. Rank held United Microelectronic as of Q2 2026.

Based on Boston Partners's 13F filing for Q2 2026, filed 4 Aug 2026.