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India:  Approximately 156 nuclear warheads.
Israel: An estimated 90 nuclear warheads, with fissile material for up to 200.
Pakistan:  Approximately 165 nuclear warheads.

States that Declared Their Withdrawal from the NPT:

North Korea joined the NPT as a non-nuclear weapon state but announced its withdrawal from the NPT in 2003 --a move that has not been legally recognized by the other NPT member states. North Korea has tested nuclear devices and nuclear-capable ballistic missiles. Uncertainty persists about how many nuclear devices North Korea has assembled.

North Korea:

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  Estimated as of January 2021 to have approximately 40-50 warheads.
  
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  While there is a high degree of uncertainty surrounding North Korea's fissile material stockpile and production, particularly on the uranium enrichment side, North Korea is estimated to have 20-40 kilograms of plutonium and 250-500 kilograms of highly enriched uranium. The estimated annual production of fissile material is enough for 6-7 weapons.
  
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  North Korea operates its 5-megawatt heavy-water graphite-moderated reactor to extract plutonium for its nuclear warheads and has done so on an intermittent basis since August 2013. There has also been intermittent activity at North Korea's reprocessing facility since 2016, indicating that Pyongyang has likely separated plutonium from the reactor's spent fuel.
  
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  North Korea unveiled a centrifuge facility in 2010. It is likely that Pyongyang is using that facility to produce highly enriched uranium for weapons. U.S. intelligence suggests that there are several additional centrifuge facilities in North Korea.