Compounder for decades: Moody's (MCO), Chubb (CB), Linde (LIN), Markel (MKL), Berkshire Hathaway (BRK.B)?

I hold a diversified portfolio comprising defensive, income, and hedge positions, and I am currently building out a compounding growth component. I have been looking at the companies listed above - i don't plan to add all - (MCO, CB, LIN, MKL, BRK.B). Below, I outline my brief take on each; **I would appreciate your input on which** ***two*** **of them might be the best choices for capital accumulation over the next 25–30 years,** companies capable of withstanding various health and economic crises while maintaining their corporate culture and economic moat.

**1) Moody's:** An excellent, asset-light company that has demonstrated significant growth potential and operates within a global oligopoly where credibility is paramount. My main questions concern its ability to navigate a prolonged high-interest-rate environment (since debt issuance, and consequently its certification business, declines in such scenarios) and its capacity to preserve both its oligopolistic position and its corporate culture.

**2) Chubb:** The world's largest insurer; it has consistently maintained a combined ratio of 83–85% over extended periods. Its management team has demonstrated underwriting excellence (even when policy pricing was lower) and has effectively managed its bond investment portfolio. My question regarding Chubb concerns its ability to sustain growth and manage market cycles. I don't have much else to add here, as I have few doubts about the company.

**3) Linde:** An excellent industrial company with predictable revenues and inflation-indexed contracts. It is highly diversified, both geographically and across end-markets (chemicals and energy; healthcare; electronics; manufacturing, metals, and mining; food and beverages). This diversification ensures resilience and provides growth catalysts linked to the energy transition and the modernization of AI and data centers. My question is whether it has the capacity to compound capital, even with a business model that is more capital-intensive compared to the other companies I listed above.

**4) Markel:** a holding company with operations in insurance, an investment portfolio, and majority-owned subsidiaries (across industrial, consumer, and financial sectors). It has demonstrated consistency in compounding capital over the long term, growing its book value and generating impressive returns on its investment portfolio. My question concerns whether the company possesses the deeply ingrained culture needed to maintain excellence and continue growing over the next 30 years, even through leadership succession; whether the investment portfolio manager (I believe it is Tom Gayner) remains outstanding; and how one evaluates their capital allocation decisions.

**5) Berkshire Hathaway:** we all know what it is; it needs no introduction. My question concerns the quality of Greg Abel’s capital allocation, specifically, whether this can be assessed based on the years he has held key decision-making roles while Buffett is still at the helm. Given the company's massive size, growth is challenging; I am interested in the possibility of a shift in the allocation profile, and its quality, toward higher-growth assets, while still preserving the company's fundamental focus on quality.

I would appreciate your insights.

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