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Rossby Financial’s United Microelectronic UMC Stock Holding History

Rossby Financial’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
Q1 		$4.04K Buy
451
+359
+390% +$3.5K ﹤0.01% 1568
2025
Q4 		$723 Hold
92
– – ﹤0.01% 1576
2025
Q3 		$682 Buy
+92
New +$653 ﹤0.01% 1334

Other funds holding UMC

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Man Group
Man Group London, United Kingdom $55.1B AUM 24.23% 1-Year Est. Return
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT) London, United Kingdom $89.9B AUM 20.22% 1-Year Est. Return

Rossby Financial's UMC Position: Q1 2026 in Review

Rossby Financial increased its United Microelectronic (UMC) stake by 390% in Q1 2026, buying an estimated $3.5K and bringing the position to 451 shares worth $4.04K. The position accounts for ﹤0.01% of the portfolio, ranked #1568.

Rossby Financial first reported a position in UMC in Q3 2025 and has held it in 3 quarters since. 316 funds tracked by Wall St. Rank hold UMC as of Q1 2026.

  • Rossby Financial held 451 shares of United Microelectronic worth $4.04K as of Q1 2026.
  • Rossby Financial bought 359 United Microelectronic shares in Q1 2026, an estimated $3.5K.
  • United Microelectronic made up ﹤0.01% of Rossby Financial's portfolio in Q1 2026, its #1568 holding.
  • Rossby Financial first reported a position in United Microelectronic in Q3 2025 and has held it in 3 quarters since.
  • 316 funds tracked by Wall St. Rank held United Microelectronic as of Q1 2026.

Based on Rossby Financial's 13F filing for Q1 2026, filed 11 May 2026.