ADT (ADT) - Market capitalization

Market cap: £3.89 Billion

As of May 2026 ADT has a market cap of £3.89 Billion. This makes ADT the world's 3076th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of ADT from 2018 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	£3.89 B	-21.36%
2025	£4.95 B	0.16%
2024	£4.94 B	0.29%
2023	£4.93 B	-27.94%
2022	£6.84 B	32.23%
2021	£5.17 B	8.95%
2020	£4.75 B	4.31%
2019	£4.55 B	25.52%
2018	£3.63 B

End of Day market cap according to different sources

On May 16th, 2026 the market cap of ADT was reported to be:

£4.04 Billion

by Nasdaq

£3.89 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Etsy ETSY	£4.13 B	6.08%	🇺🇸 USA
Palo Alto Networks PANW	£147.78 B	3,691.18%	🇺🇸 USA
Brink's BCO	£3.20 B	-17.73%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of ADT (ADT)

Market cap: £3.89 Billion