This project will delve into the 10K reports of the top 25 companies in 2004 and in 2025 to see how their book assets compare to their market value. Will the continued rise of tech mean that less of market cap is tangible asset value? To do this analysis, I will be using excel to explore this question through a variety of filters such as industry, which companies rose and fell on the top 25 list, and company age. I will gather my data from publicly available SEC filings, pulling the breakdown of reported assets from the balance sheet. I be comparing the proportion of market cap that can be explained by only their tangible assets and also by the total of their listed assets. Since internal R & D and intellectual property like trademarks and patents do not appear on the balance sheet, the difference will be explained by a combination of unlisted intangible assets and investor expectation. I hope to answer the question: what is the makeup of recent economic growth with respect to assets?