IBM Offices Worldwide: Headquarters, Labs and Registered Offices

About 39 million square feet of offices, labs, plants and data centres make up IBM’s worldwide footprint, and all of it is run from a headquarters the company owns at One New Orchard Road, Armonk, New York 10504 (phone 914-499-1900). Roughly 264,300 people worked for IBM and its wholly owned subsidiaries at the end of 2025.

IBM does not publish a single list of every office address. We pieced together its footprint from its 2025 annual report on Form 10-K, its research division’s own pages, and the public company registers in the UK and India. Then we ran our own numbers on space, staff and revenue by region, which IBM does not combine anywhere.

How Much Office Space IBM Holds Worldwide

IBM’s facilities serve sales and distribution, manufacturing and development, data processing including cloud centres, research, and administration. All business segments share them. At the end of 2025 the total came to about 39 million square feet.

By our calculation, IBM leases about 72% of all its space and owns 28%. The balance tilts much further toward leasing abroad, where 86% of the space is rented, compared with 53% in the United States. The US holds 43.6% of the space, while about 40% of revenue comes from US customers, so the home market has slightly more space than its share of sales.

Ownership is concentrated at home. Of the 11 million square feet IBM owns, 8 million, or about 73%, are in the United States, including the Armonk headquarters. Outside the US, IBM owns just 3 million square feet and rents the other 19 million, so almost every IBM office abroad sits in a leased building.

Dividing 39 million square feet by 264,300 employees gives about 148 square feet per person. That figure includes factories, labs and data centres as well as desks, so the office space per worker is smaller. With so much of the estate on leases, IBM can shrink or move sites as contracts end, without selling buildings.

IBM Revenue by Region Compared With Its Footprint

IBM reports revenue in three regions, and the split shows where most of its business comes from. In 2025, the Americas brought in $33.3 billion, Europe, the Middle East and Africa $22.2 billion, and Asia Pacific $12.0 billion.

On our numbers, IBM earned about $1,732 of revenue per square foot of space in 2025, and about $255,500 of revenue per employee. The Americas region produces almost half of sales, Europe, the Middle East and Africa about a third, and Asia Pacific less than a fifth.

IBM Research Labs: 11 Labs on 18 Sites

IBM Research runs 11 labs spread across 18 sites. The labs listed by the division are Africa, Albany, Cambridge, India, Ireland, Israel, Japan, Silicon Valley, the United Kingdom, Yorktown Heights and Zurich. Three of the 11 are in the United States, at Yorktown Heights and Albany in New York State and in Silicon Valley, and the 18 sites include more than one location for some labs.

IBM Research Africa was founded in 2013 and has sites in Johannesburg and Nairobi. The Johannesburg lab is at 45 Juta Street, Johannesburg, 2000, with the phone number +27 112 769 200. Labs like these hire researchers and work with universities, and they do not handle customer support.

Readers who want to try IBM’s quantum hardware without visiting a lab can use the cloud. Our guide to accessing quantum computers through the cloud covers IBM Quantum plans, and our list of post-quantum cryptography companies looks at the security side of the same research field.

IBM’s Poughkeepsie Mainframe Plant and the $150 Billion US Plan

Poughkeepsie, in New York’s Hudson Valley, is where IBM manufactures its mainframes. In April 2025, IBM announced plans to invest $150 billion in America over five years, which averages $30 billion a year by our calculation. More than $30 billion of that plan goes to research and development for American manufacturing of mainframe and quantum computers.

The research and manufacturing share of the plan is more than $30 billion out of $150 billion, or over 20% of the total. That money goes to work done on US soil, which makes the Poughkeepsie plant and the US research labs the parts of IBM’s footprint most directly tied to the commitment.

IBM says more than 70% of the world’s transactions by value run through IBM mainframes made in America. It also says it operates the world’s largest fleet of quantum computer systems, with its Quantum Network serving nearly 300 Fortune 500 companies, universities, national laboratories and start-ups.

IBM’s Registered Offices in the UK and India

Outside the United States, IBM works through local companies, and each one has its own registered office. That is the address to use for legal letters, contracts and tax documents in that country.

IBM United Kingdom Limited

IBM’s main UK company is IBM United Kingdom Limited, company number 00741598, incorporated on 21 November 1962. Its registered office is Building C, IBM Hursley Office, Hursley Park Road, Winchester, Hampshire SO21 2JN. The company is active, and its registered nature of business is the manufacture of computers and peripheral equipment.

IBM India Private Limited

IBM India Private Limited has the CIN U72200KA1997PTC022382 and was incorporated on 13 June 1997. Its registered office is No. 12, Subramanya Arcade, Bannerghatta Main Road, Bengaluru, Karnataka 560029. In the year to 31 March 2025, it reported standalone sales of ₹32,340.6 crore and a net profit of ₹3,938.7 crore. Sandip Vinubhai Patel is the managing director.

Small firms that work with IBM India teams and need their own base in the city can compare flexible desks in our guide to coworking spaces in Bangalore.

Writing to IBM: Address Blocks for Letters and Contracts

A letter reaches the right desk faster when it carries the full legal name of the IBM company and its registration number. We set out the three registered addresses in the format a courier or post office expects. Copy them exactly, and add the department or person you are writing to on the first line.

For formal notices, send the letter by a tracked service and keep the receipt. If your contract names a different notice address, that address takes priority over the registered office, so check the notices clause first. Freelancers and small suppliers who bill IBM entities can use our free invoice generator and add the correct legal name and registration number to each invoice.

Reaching the Right IBM Office

Most people who search for an IBM office need a contact, not a building. These steps will get your message to the right team.

1. Sales and product questions belong with the IBM website for your country, which lists local contacts. Note the local entity name on any quote you receive.
2. Contracts and legal notices go to the registered office of the IBM company that signed your contract, such as IBM India Private Limited in Bengaluru or IBM United Kingdom Limited in Winchester.
3. Investor and corporate matters go to the Armonk headquarters.
4. Job interviews are held at a named site. Ask the recruiter for the full building address, since one city can have more than one IBM site.
5. Calls across regions need the local time. Our time zone converter shows the local time when your contact sits in Zurich, Bengaluru or Armonk.

Be wary of people who claim to be from IBM support and ask for remote access or payment. Our list of phishing email examples shows the usual tricks. For a similar directory of another tech giant, see our guide to Google office addresses, and for how large employers compare as workplaces, see our list of the best workplaces in the world.

Filings and IBM Pages Used for This Office Directory

• IBM: Form 10-K for fiscal year 2025
• IBM: Form 10-K for fiscal year 2025, annual report exhibit
• IBM Research: Europe and global labs
• IBM Research: Africa lab
• IBM Newsroom: IBM unveils $150 billion investment in America (28 April 2025)
• Companies House: IBM United Kingdom Limited (00741598)
• Company record: IBM India Private Limited, CIN U72200KA1997PTC022382