Mariner
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Mariner’s United Microelectronic UMC Stock Holding History

Mariner’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 		$1.7M Buy
190,382
+17,286
+10% +$169K ﹤0.01% 1614
2025
Q4 		$1.36M Buy
173,096
+29,191
+20% +$221K ﹤0.01% 1721
2025
Q3 		$1.09M Sell
143,905
-42,787
-23% -$304K ﹤0.01% 1834
2025
Q2 		$1.43M Buy
186,692
+85,154
+84% +$632K ﹤0.01% 1549
2025
Q1 		$723K Buy
101,538
+14,890
+17% +$94.9K ﹤0.01% 1911
2024
Q4 		$562K Sell
86,648
-37,103
-30% -$266K ﹤0.01% 2099
2024
Q3 		$1.05M Buy
123,751
+10,440
+9% +$87.3K ﹤0.01% 1564
2024
Q2 		$993K Sell
113,311
-13,704
-11% -$113K ﹤0.01% 1501
2024
Q1 		$1.03M Buy
127,015
+7,193
+6% +$57.2K ﹤0.01% 1480
2023
Q4 		$1.01M Buy
119,822
+9,850
+9% +$75.1K ﹤0.01% 1423
2023
Q3 		$776K Buy
109,972
+9,184
+9% +$66.5K ﹤0.01% 1480
2023
Q2 		$795K Buy
100,788
+18,732
+23% +$154K ﹤0.01% 1440
2023
Q1 		$718K Sell
82,056
-6,384
-7% -$51.7K ﹤0.01% 1461
2022
Q4 		$577K Sell
88,440
-11,429
-11% -$75.7K ﹤0.01% 1565
2022
Q3 		$556K Buy
+99,869
New +$659K ﹤0.01% 1359
2022
Q2 		– Sell
-26,986
Closed -$246K – 1453
2022
Q1 		$246K Buy
+26,986
New +$267K ﹤0.01% 1333

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

Mariner's UMC Position: Q1 2026 in Review

Mariner increased its United Microelectronic (UMC) stake by 10% in Q1 2026, buying an estimated $169K and bringing the position to 190,382 shares worth $1.7M. The position accounts for ﹤0.01% of the portfolio, ranked #1614.

Mariner first reported a position in UMC in Q1 2022 and has held it in 16 quarters since. 316 funds tracked by Wall St. Rank hold UMC as of Q1 2026.

  • Mariner held 190,382 shares of United Microelectronic worth $1.7M as of Q1 2026.
  • Mariner bought 17,286 United Microelectronic shares in Q1 2026, an estimated $169K.
  • United Microelectronic made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #1614 holding.
  • Mariner first reported a position in United Microelectronic in Q1 2022 and has held it in 16 quarters since.
  • 316 funds tracked by Wall St. Rank held United Microelectronic as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.