13FPulse
UM

UMC UNITED MICROELECTRON-SP ADR

2026Q2 · CUSIP 910873405 · Foundry & OSAT · Sector: Semiconductors

Piling in

Net holder growth ranks near the top of the market

Funds that own it
354
Institutions that reported holding it to the SEC
Net increase in holders
+37
Last quarter 317 → now 354
How unusual is that
Top 10%
Stronger buying than 92% of US stocks
What the filings say, in one paragraph

354 funds held UMC at the end of 2026Q2, up 37 from the quarter before. That is stronger buying than 92.0% of US stocks — among the most piled-into names this quarter. UMC has had 12 buying rushes in its history, and the price moved +14.3% on average over the six months after (that is the raw price move, not how much it beat the market by). It sits in the Semiconductors sector, tagged Foundry & OSAT.

How many funds owned it, quarter by quarter

Bars = net change in institutional holders, positive (green) or negative (red). Line = total institutional holders.

2013Q3: holders=96 2013Q4: holders=92 2014Q1: holders=88 2014Q2: holders=94 2014Q3: holders=83 2014Q4: holders=91 2015Q1: holders=93 2015Q2: holders=98 2015Q3: holders=91 2015Q4: holders=87 2016Q1: holders=89 2016Q2: holders=79 2016Q3: holders=88 2016Q4: holders=84 2017Q1: holders=98 2017Q2: holders=110 2017Q3: holders=103 2017Q4: holders=115 2018Q1: holders=111 2018Q2: holders=114 2018Q3: holders=117 2018Q4: holders=119 2019Q1: holders=120 2019Q2: holders=118 2019Q3: holders=117 2019Q4: holders=121 2020Q1: holders=121 2020Q2: holders=122 2020Q3: holders=145 2020Q4: holders=189 2021Q1: holders=203 2021Q2: holders=203 2021Q3: holders=232 2021Q4: holders=265 2022Q1: holders=240 2022Q2: holders=224 2022Q3: holders=230 2022Q4: holders=223 2023Q1: holders=222 2023Q2: holders=220 2023Q3: holders=217 2023Q4: holders=251 2024Q1: holders=244 2024Q2: holders=236 2024Q3: holders=268 2024Q4: holders=254 2025Q1: holders=235 2025Q2: holders=239 2025Q3: holders=241 2025Q4: holders=271 2026Q1: holders=317 2026Q2: holders=354 -46 -23 +0 +23 +46 71222372 13Q315Q116Q318Q119Q321Q122Q324Q125Q326Q2 Net change in holders (bars) Total funds holding (line)

What happened after each past buying rush 12 times in its history

Quarter of the rush How unusual then Price, next 3 months Price, next 6 months
2026Q2 Top 10%
2026Q1 Top 10% +50.9%
2025Q4 Top 20% -8.1% +73.3%
2024Q3 Top 10% -4.5% -6.6%
2023Q4 Top 20% +3.9% +6.2%
2021Q4 Top 20% -10.4% -15.3%
2021Q3 Top 5% +1.9% -15.8%
2020Q4 Top 20% -13.5% -15.4%

These are the raw price moves, not how much it beat the market by. Compare them against the market over the same months — in a strong bull market almost everything is up.

Show all the numbers (large funds, value held, options…) ▾
Of them, large funds
138
Change in large funds
+15
Total value they hold
$4.8B
Funds buying for the first time
89
Funds that sold out entirely
52
Price change that quarter
+18.7%
Funds holding puts (bearish)
11
Funds holding calls (bullish)
14

These are for people who want to dig. Skip them if they do not mean anything to you — the three numbers above are enough.

8,697 institutions have filed for this quarter. 13F permits late filing and a small number arrive in the weeks after the deadline, so the holder counts and changes below may tick up.

Email me the next update

2026 Q3 holdings are due 2026-11-16. We will email you when the refreshed lists are live.