ADT Market Cap History
Below is a table of the ADT market cap history going back to 1/19/2018:

Date ADT Market Cap

Also see: ADT Shares Outstanding History
and ADT YTD Return
ADT Historical Market Cap:
-92.76% CAGR
ADT Historical Market Cap: +-92.76% CAGR

Mouse over chart for data details
ADT provides commercial security systems and services. Through its subsidiaries, Co. is engaged in the sale, installation, servicing, and monitoring of electronic home and business security and automation systems in the United States and Canada. Co. also offers residential, commercial, and multi-site customers a comprehensive set of burglary, video, access control, fire and smoke alarm, and medical alert solutions. Co.'s 24/7 monitoring capabilities are enabled by 12 monitoring centers. As of Sept. 30, 2017, Co. serves approximately 7.2 million customers (excluding contracts monitored but not owned) throughout the United States and Canada. We show 9 historical shares outstanding datapoints in our ADT shares outstanding history coverage, used to compute ADT market cap on those dates.

Understanding the changing numbers of shares outstanding, the changing share price, and the resulting changing ADT market cap history over the course of time is important for investors interested in comparing ADT's market cap history versus its peers. Many "beginner" or "novice" investors will look at one stock trading at a price of $10 per share and another trading at a price of $20 per share and think the latter company is worth twice as much. Of course, that is a completely meaningless comparison without also knowing how many shares outstanding there are for each of the two companies, and then calculating their respective market caps. Comparing the share price of ADT versus a peer is one thing; comparing ADT market cap versus a peer is a completely different story. Furthermore, via fluctuation both in per-share price and in the number of shares outstanding (via issuance of new shares over time, the repurchase of existing shares), the market cap for a company like ADT can fluctuate over the course of history. With this page we aim to empower investors researching ADT by allowing them to research the ADT market cap history.
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ADT (ADT) is categorized under the Industrials sector; to help you further research historical market cap numbers, below are some other companies in the same sector:

AEGN Market Cap History
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