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Which funds own UMC

United Microelectronics Corp in the Q2 2026 filings. At least 3 of the 91 current managers on file reported a position, worth $310m between them. It is among the largest positions of fewer than a fifth of the current managers on file. Buying and selling roughly cancelled this quarter, which is what a name looks like when the argument is still live.

Managers holding: 3; at least, of 91 current
Combined value: $310m; as reported
Opened: 1; new this quarter
Added to: 0; already held
Trimmed or sold out: 2; 0 sold out entirely

Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.

Managers reporting a position

Largest first. Weight is the share of that manager’s whole reported book, which is the number worth quoting: $400m is a rounding error in one book and a defining bet in another.

Manager	Value	Weight	Shares	Change on the quarter	Action
Acadian Asset Management LLC Quantitative · $84.2bn book	$157m	0.2%	5,753,245	+$84m-2,370,954	Trimmed
Man Group PLC Quantitative · $62.7bn book	$152m	0.2%	5,593,427	+$101m-135,474	Trimmed
Maverick Capital Ltd Long/short equity · $11.3bn book	$800k	0.0%	28,759	opened28,759	New

Ownership through time

At least 6 of the 95 managers whose filings are on file listed UMC in Q2 2026, against 2 in Q2 2013. 2 managers more than in Q1 2026: 1 started a position; 1 listed it again.

Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.

Managers on file listing it

Their combined reported value

Between the quarter ends of Q1 2026 and Q2 2026. Each change in shares is valued at the Q2 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.

Started in Q2 2026

Maverick Capital Ltd$783k

Largest increases, by shares

Maverick Capital Ltdnew: 28,759 shares+$783k

Largest decreases, by shares

AQR Capital Management LLC14,714,030 to 7,718,125 shares-$190m
Two Sigma Investments LP9,655,402 to 3,088,852 shares-$179m
Acadian Asset Management LLC8,124,199 to 5,753,245 shares-$65m
Man Group PLC5,728,901 to 5,593,427 shares-$3.7m

Left it

No manager on file is shown leaving it.

Manager	First listed	Largest	Q2 2026
AQR Capital Management LLC	Q1 2026	$210m	$210m
Acadian Asset Management LLC	Q3 2013	$157m	$157m
Man Group PLC	Q1 2026	$152m	$152m
Neuberger Berman Group LLC	Q3 2021	$111m	$111m
Two Sigma Investments LP	Q3 2021	$87m	$84m
Maverick Capital Ltd	Q2 2026	$783k	$783k
Renaissance Technologies LLC	Q2 2017	$153m	last listed Q3 2023
Arrowstreet Capital LP	Q3 2017	$116m	last listed Q2 2024
Millennium Management LLC	Q4 2024	$93m	last listed Q4 2024
Marshall Wace LLP	Q2 2022	$66m	last listed Q4 2025
Two Sigma Advisers LP	Q3 2022	$27m	last listed Q4 2025
Voloridge Investment Management LLC	Q2 2024	$18m	last listed Q3 2024
Holocene Advisors LP	Q4 2022	$7.2m	last listed Q2 2023
Schonfeld Strategic Advisors LLC	Q2 2021	$5.6m	last listed Q4 2021
Point72 Asset Management LP	Q2 2014	$4.8m	last listed Q2 2014
Janus Henderson Group Ltd	Q2 2013	$2.2m	last listed Q3 2013

What UMC is worth

Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.

Build the comp set around UMC →

How much of the picture this is

A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.

What to do with a name the funds are buying

Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.

Comps ExplorerValue it against the peers it trades beside Every managerRead any of these books in full Deal tapeWhat buyers paid for whole companies, not slices Hedge fund interviewsHow the room runs, and the stock pitch it wants

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Illustrative figures. Default values are plausible starting points chosen so a model has somewhere to begin. They are not data, not a view on any company, and not calibrated to anything. Outputs move with whatever you type in.

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The holdings, every quarter, and the week between

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