Takeaways From The 100 Largest Public Companies
blog.eladgil.com
blog.eladgil.com
Google, Amazon, Microsoft, and Apple all have B2B SBUs. That doesn't mean they're necessarily B2B companies.
I think in the end it makes sense to classify Microsoft as B2B as: a. For much of its history it has been predominantly a B2B company for its products that got traction (O/S, Windows, Office are used by consumers, but the big $ customers of these products have traditionally been IT companies). With the exception of XBOX, most of its consumer products have been big money losers.
b. Even today, the majority of Microsoft profits are from enterprise or SMB sales of its O/S, Windows, and Office products. Its core consumer products (MSN etc.) are largely money losers. So if you think of MSFT as a business, it mainly makes money off of other businesses.
However, I do think market cap is a reasonable proxy as factors like growth (which can strongly impact market cap) have interesting implications for where an entrepreneur should or should not build a business.
Market cap is a proxy that has too many outside factors and should be eschewed in favor of more concrete and reliable numbers since they are readily available.
I agree with you that a more complex analysis could be done and it would be more rigorous and it may reveal additional insights.
However, I am guessing the primary takeaways I listed would not change much with the additional rigor.
Your comments also raise an interesting question - i.e. what are the right measures by an entrepreneur for the value their company is creating? There are obvious points of human impact (user base, engagement etc.), but if you are an entrepreneur, what financial metric should you care about? For example, Jeff Bezos often point to free cash flow as the big metric Amazon tracks...