United Microelectronics Corp: which funds bought and sold

Institutions that bought and sold United Microelectronics shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 212 institutions that filed 13F reports for both quarters added to or opened positions in United Microelectronics, and 147 cut or closed them. Together they added a net 5.6M shares, +3.2% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 20.7M shares (−39.8%); index fund managers were net buyers of 5.3M shares (+9.8%). 81 opened a new position and 36 sold out entirely.

Bought, Q2 2026 212 institutions, 81 of them new holders Sold, Q2 2026 147 institutions, 36 of them sold out

Net change, all compared +5.6M shares (+3.2%)

Net change, active managers −20.7M shares (−39.8%), 14 bought, 24 sold

Buyers versus sellers

institutions compared, 389

212 bought 30 147 sold

Active managers and hedge funds 14 bought · 24 sold · −20.7M

Index fund managers 4 bought · 5 sold · +5.3M

Other institutions 194 bought · 118 sold · +21.1M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Bank Of America Corp	+7.6M +291.1%	10.2M	$277M
Goldman Sachs Group Inc	+5.2M +89.1%	11.1M	$302M
Blackrock, Inc. Index funds	+4.0M +14.7%	31.5M	$858M
Neuberger Berman Group LLC Active manager	+4.0M +3524.9%	4.1M	$111M
UBS Group AG	+3.5M +42.3%	11.6M	$317M
Jpmorgan Chase & Co	+3.4M +1304.2%	3.7M	$98.3M
Rafferty Asset Management, LLC Index funds	+2.7M +53.6%	7.7M	$208M
Empowered Funds, LLC	+1.9M New position	1.9M	$51.5M
Citigroup Inc	+1.1M +26.0%	5.4M	$147M
E Fund Management Co., Ltd.	+996K New position	996K	$27.1M
Nomura Holdings Inc	+814K New position	814K	$22.1M
Northern Trust Corp Index funds	+788K +24.6%	4.0M	$108M
Tidal Investments LLC	+759K +47.6%	2.4M	$64.1M
Connor, Clark & Lunn Investment Management Ltd.	+633K +89.1%	1.3M	$36.5M
SG Americas Securities, LLC	+587K +587.4%	687K	$18.7M
Matthews International Capital Management LLC	+488K +49.9%	1.5M	$39.9M
Squarepoint Ops LLC Hedge fund	+480K +388.6%	603K	$16.4M
Dimensional Fund Advisors LP	+369K +13.0%	3.2M	$87.6M
Nuveen, LLC	+258K New position	258K	$7M
LMR Partners LLP Hedge fund	+256K New position	256K	$7M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Neuberger Berman Group LLC Active manager	+4.0M +3524.9%	4.1M	$111M
Squarepoint Ops LLC Hedge fund	+480K +388.6%	603K	$16.4M
LMR Partners LLP Hedge fund	+256K New position	256K	$7M
Capital Fund Management S.A. Hedge fund	+152K +20.4%	897K	$24.4M
Wellington Management Group LLP Active manager	+134K +137.6%	231K	$6.3M
Boston Partners Active manager	+119K New position	119K	$3.2M
O'Shaughnessy Asset Management, LLC Active manager	+90K +21.0%	516K	$14.1M
Lazard Asset Management LLC Active manager	+70K +100.2%	140K	$3.8M
Walleye Capital LLC Hedge fund	+41K +56.0%	113K	$3.1M
Maverick Capital Ltd Hedge fund	+29K New position	29K	$782,532

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
AQR Capital Management LLC Hedge fund	−7.0M −47.5%	7.7M	$210M
Two Sigma Investments, LP Hedge fund	−6.6M −68.0%	3.1M	$84M
Qube Research & Technologies Ltd Hedge fund	−5.1M Sold out	0	—
Jane Street Group, LLC	−2.6M Sold out	0	—
Acadian Asset Management LLC Active manager	−2.4M −29.2%	5.8M	$157M
D. E. Shaw & Co., Inc. Hedge fund	−1.7M −89.6%	196K	$5.3M
Vanguard Portfolio Management LLC Index funds	−1.5M −55.4%	1.2M	$33.5M
Millennium Management LLC Hedge fund	−1.3M −71.4%	506K	$13.8M
Aquatic Capital Management LLC	−577K −95.6%	27K	$730,017
Citadel Advisors LLC Hedge fund	−555K −72.5%	210K	$5.7M
Morgan Stanley	−492K −5.6%	8.3M	$225M
BNP Paribas Financial Markets	−455K −28.8%	1.1M	$30.7M
B. Metzler Seel. Sohn & Co. AG	−431K −65.9%	223K	$6.1M
Moran Wealth Management, LLC	−410K −45.1%	500K	$13.6M
Eurizon Capital Sgr S.P.A.	−404K −77.0%	120K	$3.2M
Vanguard Capital Management LLC Index funds	−386K −4.3%	8.6M	$234M
Susquehanna International Group, LLP	−375K −65.1%	201K	$5.5M
North Of South Capital LLP	−354K −87.5%	51K	$1.4M
Capstone Investment Advisors, LLC Hedge fund	−353K −97.0%	11K	$294,684
BNP Paribas Asset Management Holding S.A.	−281K −26.8%	769K	$20.9M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
AQR Capital Management LLC Hedge fund	−7.0M −47.5%	7.7M	$210M
Two Sigma Investments, LP Hedge fund	−6.6M −68.0%	3.1M	$84M
Qube Research & Technologies Ltd Hedge fund	−5.1M Sold out	0	—
Acadian Asset Management LLC Active manager	−2.4M −29.2%	5.8M	$157M
D. E. Shaw & Co., Inc. Hedge fund	−1.7M −89.6%	196K	$5.3M
Millennium Management LLC Hedge fund	−1.3M −71.4%	506K	$13.8M
Citadel Advisors LLC Hedge fund	−555K −72.5%	210K	$5.7M
Capstone Investment Advisors, LLC Hedge fund	−353K −97.0%	11K	$294,684
LSV Asset Management Active manager	−260K −37.5%	434K	$11.8M
Engineers Gate Manager LP Hedge fund	−144K −69.0%	65K	$1.8M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Empowered Funds, LLC	1.9M	$51.5M
E Fund Management Co., Ltd.	996K	$27.1M
Nomura Holdings Inc	814K	$22.1M
Nuveen, LLC	258K	$7M
LMR Partners LLPHedge fund	256K	$7M
Deutsche Bank Ag\	212K	$5.8M
Boston PartnersActive manager	119K	$3.2M
Polymer Capital Management (HK) Ltd	115K	$3.1M
Mirae Asset Global Investments Co., Ltd.	113K	$3.1M
Aubrey Capital Management Ltd	100K	$2.7M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Qube Research & Technologies LtdHedge fund	5.1M	$45.8M
Jane Street Group, LLC	2.6M	$23.1M
Old Mission Capital LLC	226K	$2M
HRT Financial LP	165K	$1.5M
Stifel Financial Corp	164K	$1.5M
Bridgewater Associates, LPHedge fund	134K	$1.2M
Arrowstreet Capital, Limited PartnershipHedge fund	130K	$1.2M
Group One Trading LLC	114K	$1M
Drw Securities, LLC	99K	$888,813
Quantbot Technologies LPHedge fund	86K	$773,519

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 360
Ten largest holders: 60.0%
Index fund managers: 32.9%
Active managers and hedge funds: 17.4%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	14	24	4	9	−20.7M	−39.8%
Index fund managers	4	5	0	0	+5.3M	+9.8%
Other institutions	194	118	77	27	+21.1M	+31.0%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on United Microelectronics.

Only managers that filed a holdings report for both quarters are compared (389 here). 17 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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