L3VLUP
ProSign in

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 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 10 Feb 2026
Managers listing it
18
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 1 listed it in both
Shares listed
33,911,515
combined, among listed positions
Reported value
$267m
combined, at the quarter end

Among the 92 comparable managers: 16 buyers (opened or added shares) and 4 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +22,492,711.

Managers listing UMC in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

18 of 18 holders

ActionFiling
AQR Capital Management LLC9,464,312$74munder 0.1%Added+8,492,46617 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP5,675,393$45m0.06%Added+2,144,82917 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP4,739,326$37munder 0.1%Added+1,937,92113 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP3,449,200$27m0.05%Added+1,839,50017 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC2,297,586$18munder 0.1%Added+2,270,06510 Feb 2026 (the filing on sec.gov)
Man Group PLC2,123,977$17munder 0.1%Added+1,641,44417 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC1,980,820$16munder 0.1%Added+1,886,99617 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC1,124,310$8.8munder 0.1%Added+1,073,77117 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.870,260$6.8munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Millennium Management LLC695,399$5.5munder 0.1%Added+383,48817 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP470,067$3.7munder 0.1%Added+33,81217 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC459,153$3.6munder 0.1%Added+209,29212 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)213,690$1.7munder 0.1%Trimmed-1,73817 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP128,821$1.0munder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Invesco Ltd89,935$707kunder 0.1%Added+74119 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC56,901$447kunder 0.1%Added+24,61727 Oct 2026 (the filing on sec.gov)
Quantbot Technologies LP56,125$441kunder 0.1%Trimmed-179,47910 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC16,240$128kunder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, 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 (3)

Exited (2)

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 →