AAPL…MSFT…GOOGL…META…NVDA…BRK-B…AMZN…JPM…BAC…KO…CVX…OXY…AXP…CMG…V…AAPL…MSFT…GOOGL…META…NVDA…BRK-B…AMZN…JPM…BAC…KO…CVX…OXY…AXP…CMG…V…
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Head-to-head comparison

Andreas Halvorsen vs Jeffrey Ubben

Andreas Halvorsen
Viking Global Investors
Q8/10
"Long-short equity, deep fundamental research, Tiger Cub pedigree."
6 positionsSince 1999
Jeffrey Ubben
ValueAct Capital
Q8/10
"Constructive activism. Partner with management, not fight them."
5 positionsSince 2000

Shared conviction

Stocks both managers hold as a top position. Overlap in conviction is a strong consensus signal.

TickerAndreas %Jeffrey %
META6.4%8.1%

Recent moves — Q4 2025

Latest quarter activity for each manager.

Andreas Halvorsen
  • METAADD +78%
    37.53% add — Q4's biggest META buyer.
  • MSFTADD +22%
    Tiger-style quality compounder add.
  • NVDAADD +18%
    Still leaning into AI infrastructure.
Jeffrey Ubben
  • METAADD +10%
    Activist continuing to build META exposure.
  • ENPHNEW
    New solar position.

Data sourced from 13F filings with the SEC. Overlap in top positions is a concrete consensus signal, not investment advice.