Using open-source data, the nonprofit Centre For Advance Defense Studies (C4ADS) report published in April 2020 provides one of the most comprehensive overviews of networks supplying the rivals, in a region regarded as one of the world’s most dangerous nuclear flashpoints.

To identify companies involved, C4ADS analysed more than 125 million records of public trade and tender data and documents, and then checked them against already-identified entities listed by export control authorities in the United States and Japan. Pakistan, which is subject to strict international export controls on its programme, has 113 suspected foreign suppliers listed by the United States and Japan. But the C4ADS report found an additional 46, many in shipment hubs like Hong Kong, Singapore and the United Arab Emirates. The father of Pakistan’s atomic bomb, AQ Khan, admitted in 2004 to selling nuclear technology to North Korea, Iran and Libya. He was pardoned a day later by Pakistani authorities, which have refused requests from international investigators to question him.

India has a waiver that allows it to buy nuclear technology from international markets. The Indian government allows inspections of some nuclear facilities by the International Atomic Energy Agency, but not all of them. C4ADS identified 222 companies that did business with the nuclear facilities in India that had no IAEA oversight. Of these, 86 companies did business with more than one such nuclear facility in India.

Both countries are estimated to have around 150 useable nuclear warheads apiece, according to the Federation of American Scientists, a nonprofit group tracking stockpiles of nuclear weapons.

Excerpts from Alasdair Pal, Exclusive: India, Pakistan nuclear procurement networks larger than thought, study shows, Reuters, Apr. 30, 2020