The biggest companies in Seattle: 23 headquarters ranked by revenue, and how lopsided the list is

This ranking is for job seekers, suppliers, investors and B2B sellers who want the Seattle area's biggest companies in order, with figures they can check. It covers public companies headquartered in the Seattle-Tacoma-Bellevue metro (King, Snohomish and Pierce counties). For the full market of 110,685 business establishments, see companies in Seattle.

The 23 biggest companies headquartered in the Seattle area

Each figure is from the company's latest annual report on Form 10-K: the headquarters city on its cover page, revenue as reported, and the headcount in its human capital section.

Columbia Banking System's figure is net interest income plus non-interest income, our sum of the two lines in its income statement, since banks don't report a single revenue line. TrueBlue's headcount is its own staff, not the roughly 291,000 people it placed in work during 2025.

Three companies, 84% of the revenue

Amazon, Microsoft and Costco reported $1.35 trillion between them, 84.0% of the list's total. Amazon's revenue alone is 80% of the other 22 companies' combined. That concentration matters if you sell into the region: the second tier is where most of the reachable enterprise accounts are, and it's spread across very different industries: travel (Expedia, Alaska Air), freight and logistics (Expeditors, Radiant), trucks (PACCAR), timber (Weyerhaeuser), instruments (Fortive), and consumer internet (Zillow, Remitly, Trupanion, Getty Images).

Fiscal years matter more here than in most cities. Microsoft's year ends in June, Costco's at the end of August and Starbucks' and F5's in September, so this table mixes periods up to 11 months apart. Greater Seattle Partners' own top-ten table, which uses 2024 figures, put Costco ahead of Microsoft; on the latest filings, Microsoft's $331.84 billion is ahead of Costco's $303.15 billion.

Revenue per employee

How much revenue each employee supports says a lot about how a company buys. These are our calculations from the table (revenue divided by the headcount each 10-K reports):

Microsoft's figure counts only full-time staff, so it's slightly high. High-revenue-per-head companies buy software and services per seat and expect a strong business case for each. Starbucks, Savers and Zumiez, with large part-time store workforces, buy for scale and simplicity: anything per employee has to be cheap and work across hundreds of locations.

Who isn't on the list, and why

Private companies and cooperatives are missing too, because they don't publish results in SEC filings.

Fortune 500 companies in Seattle

Fortune ranks companies by revenue, so the companies at the top of this table are the region's Fortune 500 members. Fortune uses its own revenue definitions and fiscal-year cutoffs, so its ranks can differ from these figures; check its site for ranks and use this table for figures you can trace to a filing.

Selling to Seattle's biggest companies

At the top three, expect supplier onboarding through a procurement portal, a security and privacy review for anything that touches data, and payment terms set by the buyer. The second tier is more reachable: a single business unit or regional team can often buy on its own budget. Use the 10-K to aim: segment reporting tells you which units hold budgets, and the human capital section tells you where the people are.

Illustrative example. The seller and its figures are fictional; the company figures are from the tables above.

Elliott Bay Localization (elliottbay.example) translates software and help content and wants Seattle companies that sell across languages.

• From the table it picks six from the second tier with international customers: Expedia Group, Coupang, Remitly, Getty Images, F5 and Alaska Air Group.
• At an average of $180,000 a year per account, winning two would add $360,000 in annual revenue.
• It starts with the product localization or internationalization lead, then the vice president of the product line with the most non-English users.

Bebop can find the localization and international product leaders at each of the six and draft outreach based on what each company says about its markets in its 10-K.

Subject: Launching [product] in [language] faster

Hi [first name],

[Company]'s 10-K describes customers in [number] countries. The slow part of a new language usually isn't translation, it's the review loop between product, legal and the local market team.

We localize product and help content for Seattle software and travel companies, with in-market reviewers and turnaround measured in days. Would a sample of one release, translated and reviewed, be useful?

[Your name], Elliott Bay Localization

Next step: prepare for accounts like these with enterprise account research.