(Stockholm, 8 June 2026) The Stockholm International Peace Research Institute (SIPRI) today launches its annual assessment of the state of armaments, disarmament and international security. Key findings of SIPRI Yearbook 2026 are that states are increasingly relying on nuclear weapons as instruments of national power—reversing decades of efforts to reduce the numbers and role of nuclear weapons—even as the risks of miscalculation and escalation are rising.
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World’s nuclear arsenals expanded and upgraded
The nine nuclear-armed states—the United States, Russia, the United Kingdom, France, China, India, Pakistan, the Democratic People’s Republic of Korea (North Korea) and Israel—continued programmes to modernize and enhance their nuclear arsenals in 2025, and most deployed new nuclear-armed or nuclear-capable weapon systems during the year.
Of the total global inventory of an estimated 12 187 warheads in January 2026, about 9745 were in military stockpiles for potential use (see the table below). An estimated 4012 of those warheads were deployed with missiles and aircraft and the rest were in central storage. Between 2100 and 2200 of the deployed warheads were kept in a state of high operational alert on ballistic missiles. Nearly all of these warheads belonged to Russia or the USA, and to a lesser extent France and the UK, but China and India may now occasionally deploy a small number of warheads mounted on missiles during peacetime.
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