NSA hacked world's largest SIM-card maker: Report By: CNBC.com News February 19, 2015 at 17:04 PM EST Gemalto, the largest SIM-card maker in the world, was hacked by the NSA and its British counterpart, GCHQ, The Intercept reported Thursday. Read More >> Related Stocks: AT&T Inc Atlantic Power Corp Gemalto N.V. ADR Sentinelone Inc Cl A Verizon Communications