UNH soars, AMAT slips and these group of ETFs see diverging impacts

[Bear and bull stock market]

UnitedHealth (NYSE:UNH [https://seekingalpha.com/symbol/UNH]) and Applied Materials (NASDAQ:AMAT [https://seekingalpha.com/symbol/AMAT]) are two stocks trending on Friday in different directions for different reasons, driving a distinct wave of activity across the exchange traded funds where they make up heavy weightings—lifting some portfolios while dragging others lower.

UNITEDHEALTH

UnitedHealth (NYSE:UNH [https://seekingalpha.com/symbol/UNH]) jumped up over 12% after Warren Buffett’s Berkshire Hathaway (BRK.A [https://seekingalpha.com/symbol/BRK.A]) (BRK.B [https://seekingalpha.com/symbol/BRK.B]) revealed it had taken a new stake [https://seekingalpha.com/news/4486152-unitedhealth-rise-10-as-warren-buffetts-berkshire-hathaway-acquires-new-stake] in the health insurer during the second quarter of 2025.

Currently UNH is held by a total of 375 different exchange traded funds, but listed below are the five with the highest portfolio allocations:

No. 1: iShares U.S. Healthcare Providers ETF (NYSEARCA:IHF [https://seekingalpha.com/symbol/IHF]), 21.34% allocation.

No. 2: T. Rowe Price Health Care ETF (NASDAQ:TMED [https://seekingalpha.com/symbol/TMED]), 6.41% allocation.

No. 3: Harbor Health Care ETF (NYSEARCA:MEDI [https://seekingalpha.com/symbol/MEDI]), 6.24% allocation.

No. 4: Opal Dividend Income ETF (NYSEARCA:DIVZ [https://seekingalpha.com/symbol/DIVZ]), 5.26% allocation.

No. 5: Vanguard Health Care ETF (NYSEARCA:VHT [https://seekingalpha.com/symbol/VHT]), 5.02% allocation.

APPLIED MATERIALS

Applied Materials (NASDAQ:AMAT [https://seekingalpha.com/symbol/AMAT]) dropped more than 13% after it issued soft fiscal Q4 2025 guidance, projecting a 4.9% drop in revenue and a 9% decline in adjusted EPS year-over-year, which has prompted multiple analyst downgrades [https://seekingalpha.com/news/4486099-applied-materials-receives-multiple-downgrades-on-soft-guidance].

Applied Materials is held across 408 exchange traded funds, with the five largest portfolio allocations highlighted below:

No. 1:First Trust Nasdaq Semiconductor ETF (NASDAQ:FTXL [https://seekingalpha.com/symbol/FTXL]), 7.73% allocation.

No. 2: Pacer BlueStar Engineering the Future ETF (NASDAQ:BULD [https://seekingalpha.com/symbol/BULD]), 5.93% allocation.

No. 3: Davis Select U.S. Equity ETF (BATS:DUSA [https://seekingalpha.com/symbol/DUSA]), 5.44% allocation.

No. 4: Invesco Semiconductors ETF (NYSEARCA:PSI [https://seekingalpha.com/symbol/PSI]), 4.90% allocation.

No. 5: ProShares Nanotechnology ETF (NYSEARCA:TINY [https://seekingalpha.com/symbol/TINY]), 4.68% allocation.

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