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UMC in the 13F filings

United Microelectronics Corp · CUSIP 910873405

Sector · SemiconductorsTheme · AI infrastructure and semiconductors· L3VLUP-definedTheme · Semiconductors
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
21
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 3 listed it in both
Shares listed
47,026,741
combined, among listed positions
Reported value
$422m
combined, at the quarter end

Among the 91 comparable managers: 18 buyers (opened or added shares) and 4 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +16,564,426.

Managers listing UMC in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

21 of 21 holders

ActionFiling
AQR Capital Management LLC14,714,030$132m0.06%Added+5,249,71815 May 2026 (the filing on sec.gov)
Two Sigma Investments LP9,655,402$87m0.07%Added+3,980,00915 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC8,124,199$73m0.10%Added+5,826,61313 May 2026 (the filing on sec.gov)
Man Group PLC5,728,901$51m0.09%Added+3,604,92415 May 2026 (the filing on sec.gov)
Jane Street Group LLC2,570,219$23munder 0.1%Added+2,111,06612 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,891,608$17munder 0.1%Added+1,021,34815 May 2026 (the filing on sec.gov)
Millennium Management LLC1,770,129$16munder 0.1%Added+1,074,73015 May 2026 (the filing on sec.gov)
Citadel Advisors LLC765,322$6.9munder 0.1%Trimmed-358,98815 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP575,738$5.2munder 0.1%Added+105,67115 May 2026 (the filing on sec.gov)
Marshall Wace LLP205,414$1.8munder 0.1%Trimmed-4,533,91215 May 2026 (the filing on sec.gov)
Bridgewater Associates LP134,029$1.2munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP129,895$1.2munder 0.1%Added+1,07414 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC123,495$1.1munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)120,148$1.1munder 0.1%Trimmed-93,54215 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC114,065$1.0munder 0.1%Added+57,16427 Oct 2026 (the filing on sec.gov)
Invesco Ltd102,764$923kunder 0.1%Added+12,82912 May 2026 (the filing on sec.gov)
Wellington Management Group LLP97,227$873kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Quantbot Technologies LP86,138$774kunder 0.1%Added+30,01313 May 2026 (the filing on sec.gov)
Walleye Capital LLC72,739$653kunder 0.1%Added+56,49913 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP27,712$249kunder 0.1%Newnew14 May 2026 (the filing on sec.gov)
Tudor Investment Corp17,567$158kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (5)

Exited (1)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
3 in Q2 2024 to 6 in Q2 2026

Tracked managers listing it, at least.

02462014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
UMC by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20132$2.4mn.a.n.a.
Q3 20132$55mn.a.n.a.
Q4 20131$52mn.a.n.a.
Q1 20141$51mn.a.n.a.
Q2 20142$63mn.a.n.a.
Q3 20141$47mn.a.n.a.
Q4 20142$53mn.a.n.a.
Q1 20152$57mn.a.n.a.
Q2 20151$48mn.a.n.a.
Q3 20151$37mn.a.n.a.
Q4 20151$42mn.a.n.a.
Q1 20161$46mn.a.n.a.
Q2 20161$44mn.a.n.a.
Q3 20161$38mn.a.n.a.
Q4 20161$33mn.a.n.a.
Q1 20171$30mn.a.n.a.
Q2 20172$89mn.a.n.a.
Q3 20172$55mn.a.n.a.
Q4 20172$59mn.a.n.a.
Q1 20182$65mn.a.n.a.
Q2 20183$119mn.a.n.a.
Q3 20184$105mn.a.n.a.
Q4 20183$30mn.a.n.a.
Q1 20191$16mn.a.n.a.
Q2 20192$28mn.a.n.a.
Q3 20191$17mn.a.n.a.
Q4 20191$22mn.a.n.a.
Q1 20202$57mn.a.n.a.
Q2 20202$72mn.a.n.a.
Q3 20202$126mn.a.n.a.
Q4 20202$202mn.a.n.a.
Q1 20212$181mn.a.n.a.
Q2 20213$123mn.a.n.a.
Q3 20214$201mn.a.n.a.
Q4 20214$154mn.a.n.a.
Q1 20223$87mn.a.n.a.
Q2 20224$111mn.a.n.a.
Q3 20224$112mn.a.n.a.
Q4 20225$172mn.a.n.a.
Q1 20236$192mn.a.n.a.
Q2 20234$160mn.a.n.a.
Q3 20233$70mn.a.n.a.
Q4 20231$54m10
Q1 20241$35m01
Q2 20243$85m21
Q3 20245$217m50
Q4 20243$124m12
Q1 20251$2.1m10
Q3 20251$12m10
Q4 20254$127m164
Q1 20264$343m184
Q2 20266$715m914

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

UMC and NVDA →UMC and AVGO →UMC and MU →Choose a stock to compare with UMC →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own UMC, latest filings →Back to the 13F Explorer →