Sweden is now America’s most valuable tech ally. Most Americans haven’t noticed.

Last week, in the harbor city of Helsingborg, Sweden, Secretary of State Marco Rubio and Swedish Foreign Minister Maria Malmer Stenergard signed a Technology Prosperity Deal. The bilateral memorandum of understanding covers artificial intelligence, 5G and 6G connectivity, quantum technology, biomedicine, space, defense innovation and energy. It is the fifth such agreement the U.S. has signed globally, and the only one with a European nation.

If you missed it, you are not alone. The signing happened on the sidelines of a NATO foreign ministers’ meeting, sandwiched between geopolitical crises and alliance logistics. But for anyone paying attention to the architecture of American technological power in the 21st century, it deserves a second look.

I live and work in Texas. I am active in the Swedish American Chamber of Commerce, and I have watched this relationship develop from close range. What has happened between Washington and Stockholm over the past 12 months is not routine diplomatic housekeeping. It is a quiet strategic realignment that has moved faster and more decisively than almost anything comparable in U.S.-European relations right now.

Consider the sequence. Sweden joined NATO in March 2024, ending two centuries of non-alignment. It signed a bilateral defense cooperation agreement with the U.S. It opened new consulates general in Houston and San Francisco — deliberately targeting the two American cities most central to energy, life science and technology. In March, Sweden became the first European Union member state to sign the Pax Silica Declaration, Washington’s flagship initiative to secure global AI and semiconductor........

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