How to estimate the total worth of a company?

External question — Personal Finance Stack Exchange Author: borejwaz Original post: https://money.stackexchange.com/questions/126479 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. As of 2020/6/10, if you look at the Microsoft stock (link below), you will see that the company has a Mkt cap of $1.49T. For some time now I had been under the impression that this figure indicated the total worth of the company. https://www.google.com/search?q=msft+stock For instance, if a publicly traded company has a Mkt cap of about $2M, I would have assumed that if somebody was in the process of acquiring the said company, that somebody would have to shell out a sum not much greater than $2M at the end of the deal. A few days ago, I realized that my understanding could be flawed. For instance if a company is listed on multiple exchanges, then the Mkt cap would indicate the total worth on that exchange. So what would be a good way to estimate the total worth of a company as the market currently sees it? Is there a metric in the quarterly/annual report that can be used? Please feel free to point out other mistaken assumptions that I may have laid out above.