a&s Security 50 is our annual ranking of the 50 largest physical security equipment manufacturers in the world based on product sales revenue and profit. One of the most-read and long-running industry ranking, a&s Security 50 recognizes both global leaders and new market entrants, analyzing data listed in public or submitted financial reports for the 2021 fiscal year.

The ranking aims to reflect the dynamism and developments of the industry as it navigates an ever-changing business and technology landscape. We aim to present a snapshot of the industry and facilitate discussion on industry strategies, corporate management, R&D, business development and other important topics.

a&s Security 50 eligibility criteria:

• Electronic security equipment and software systems providers, including video surveillance, access control, intrusion detection, key component, and multiple product segments.
• Security companies or pure manufacturers with their own products, systems, brands or solutions.
• Distribution, systems integration, reselling, dealing, installation, guard service providers, information security, fire safety companies and other related revenues are excluded.
• Ability to provide FY2021 and FY2022 financial statements, audited/endorsed by certified accountant or accounting firm.
• Publicly-listed domestic or multinational companies as well as a small portion of privately-owned companies willing to share their certified annual reports. Their qualification will be carefully verified by the a&s editorial team, in terms of their brand awareness and market share.

Notes to the Financial Figures:

a&s bears no responsibility for the financial information provided by any individual company. For fair comparisons, non-US currencies were converted using midmarket exchange rates from yearly average currency exchange rates announced by Internal Revenue Service (IRS), the US tax collection agency and administers the Internal Revenue Code enacted by Congress. This is an unbiased list based on the willingness of participants to share their sales performance.