Andreas Halvorsen

Background

Ole Andreas Halvorsen (born 1961 in Borge, Norway) is a Norwegian-American billionaire hedge fund manager and the co-founder and CEO of Viking Global Investors ¹. He graduated from the Norwegian Naval Academy and served as a leader of a Norwegian naval special operations team (Marinejeger Kommandoen) before transitioning to finance ². He attended Williams College, graduating in 1986 with a degree in economics, and subsequently earned his MBA from Stanford Graduate School of Business in 1990 ².

After completing his MBA, Halvorsen joined Morgan Stanley’s investment banking division ². He then moved to Tiger Management Corporation, Julian Robertson’s legendary hedge fund, where he rose to senior managing director, director of equities, and member of the management committee ¹². Halvorsen is considered one of the most prominent “Tiger Cubs” — fund managers who trained under Robertson and went on to launch their own firms ³.

In October 1999, Halvorsen co-founded Viking Global Investors alongside David C. Ott and Brian T. Olson, both former Tiger Management colleagues ⁴. Olson departed in 2005 following a dispute, which led to litigation resolved in 2009 by the Delaware Supreme Court ⁴. As of September 2025, Viking manages more than $55 billion in assets across long-short equity, long-only equity, and private equity strategies ⁴. The firm is headquartered at 600 Washington Boulevard, Stamford, Connecticut, with additional offices in New York, San Francisco, London, and Hong Kong ⁴. Viking employs over 275 professionals, including more than 45 investment professionals ⁴.

Halvorsen’s estimated net worth is approximately $8 billion as of November 2025 ⁵. He runs the Halvorsen Family Foundation, established in 2000, which holds approximately $247 million in assets and focuses on education, distributing grants to institutions including Williams College and Stanford University ⁶. He lives in Greenwich, Connecticut with his wife, Diane ⁶.

Stated Thesis

Halvorsen and Viking Global describe their mission as achieving “maximum capital appreciation commensurate with reasonable risk” ⁷. Viking’s publicly stated approach emphasizes deep fundamental research and long-term thinking. The firm analyzes approximately 900 publicly traded companies globally through its long-short equity strategy ⁴.

Halvorsen has stated that he places particular emphasis on management quality, noting at the Milken Institute that good management teams are underappreciated for their ability to grow market share, even in low-growth environments ⁷⁸. He has described Viking’s process as involving extensive conversations with competitors and suppliers to understand competitive dynamics, followed by discussions with management teams to compare their understanding against Viking’s own assessment ⁷.

On the private side, Viking has stated its private equity strategy focuses on “disruptive technologies and growth-stage companies,” particularly in healthcare, software, and services sectors ⁹. Viking manages over $17 billion in private equity assets across more than 75 portfolio companies ⁴.

Inferred Thesis

Based on Viking Global’s Q4 2025 13F filing disclosing 72 public equity positions valued at $36 billion ¹⁰, the following patterns emerge:

Sector Allocation (based on top 20 holdings representing approximately 63% of portfolio): - Financials: PNC ($1.49B), Charles Schwab ($1.3B), Visa ($1.23B), Intercontinental Exchange ($772M) — 4 of 20 top positions (20%), representing approximately 13.4% of total portfolio - Technology: Taiwan Semiconductor ($1.7B), Microsoft ($1.29B), Alphabet ($829M), AMD ($735M) — 4 of 20 (20%), approximately 12.5% of portfolio - Industrials: RBC Bearings ($1.76B), Fortive ($1.07B), Boeing ($833M), Johnson Controls ($785M), Sherwin-Williams ($1.02B) — 5 of 20 (25%), approximately 14.9% of portfolio - Consumer/Media: McDonald’s ($1.18B), Walt Disney ($1.12B), Tesla ($679M), Amazon ($673M), T-Mobile ($801M) — 5 of 20 (25%), approximately 12.2% of portfolio - Healthcare/Biotech: BridgeBio Pharma ($1.02B) — 1 of 20 (5%), approximately 2.8% of portfolio - Chemicals: Air Products & Chemicals ($1.37B) — 1 of 20 (5%), approximately 3.8% of portfolio

Key Patterns: - Concentrated, high-conviction positions: The top 10 holdings represent 55.87% of the portfolio ¹¹. Individual positions range from roughly 1.8% to 4.8% of portfolio value, with no single position exceeding 5%. - Large/mega-cap bias: Viking has shifted its portfolio to over 90% large and mega-cap stocks, with weighted average market cap exceeding $100 billion ¹². The firm favors highly liquid stocks with average daily trading volume exceeding $100 million ¹². - Active sector rotation: In Q3 2025, Viking exited entire positions in Nvidia, Amazon, and Qualcomm while initiating new positions in Microsoft and Netflix ¹³. In Q4 2025, Viking sold entire stakes in Nike, Netflix, and Meta Platforms and bought insurance stocks including UnitedHealth Group, Chubb, and Progressive ¹⁴. This indicates a willingness to make large, decisive portfolio shifts rather than incremental adjustments. - Financials tilt intensifying: Recent quarters show a decisive shift toward large U.S. financials and insurance companies, moving away from big tech semiconductor positions ¹³¹⁴. - Long-short approach: Viking generates returns through both long and short positions, with historical cumulative outperformance of 493% vs. the S&P 500 and 525% vs. the MSCI World Index since January 2000 ¹². - Core vs. seed position discipline: Viking distinguishes between core longs (>3.5% of portfolio) with a 71% batting average and 2.49 win/loss ratio, and seed longs (<3.5%) with a 59% batting average and 1.26 win/loss ratio ¹².

Gap between stated and revealed preference: While Viking publicly describes a focus on disruptive technology and growth-stage private companies, the public equity portfolio is dominated by mature, blue-chip industrial, financial, and consumer companies. The private equity arm (not captured in 13F data) may account for the technology/healthcare innovation thesis.

Portfolio

Viking Global is a public equity hedge fund, not a venture capital firm. Its portfolio consists primarily of public market positions reported via SEC 13F filings. The table below reflects the top holdings as of Q4 2025 (December 31, 2025) ¹⁰.

This table represents the top 20 of 72 total holdings in the Q4 2025 13F filing, covering approximately 63% of the $36 billion public equity portfolio ¹⁰. Viking also manages over $17 billion in private equity across 75+ companies, which are not captured in 13F filings ⁴.

In Their Own Words

At a Milken Institute appearance, Halvorsen described short selling: “It’s a heartwrenching activity, because you can lose a lot of money doing it” ⁸. He added that when a short position goes wrong, “you have to get out very quickly, which means you can’t have very large positions” ⁷.

On management quality, Halvorsen has stated that “good management teams are extremely underappreciated in their ability to take market share, even in low growth environments,” and conversely, “poor management teams are underappreciated in that they can destroy things quicker than you think” ⁷.

In a 2015 investor letter regarding Alphabet (Google), Viking wrote: “We think that the secular shift of advertising dollars from traditional media to search and YouTube will drive substantial revenue growth going forward” ⁷.

Halvorsen has emphasized patience as a core principle, stating that “you have to have patience in any business, and hedge funds are no different” ⁷.

On Viking’s mission, Halvorsen has stated: “Our job is to achieve maximum capital appreciation commensurate with reasonable risk” ⁷.

On the firm’s culture, Halvorsen has expressed a commitment to continuous improvement, saying the team at Viking aims to “become better at what we do, every day” ⁷.

What Founders Say

No independently sourced founder testimonials found. As a public equity hedge fund, Viking Global does not have a traditional venture-style portfolio of startup founders. The firm’s relationships are primarily with management teams of public companies and growth-stage private companies. No public testimonials from portfolio company executives about their experience working with Viking were identified during research.

Sources