| 1976 | ATMT INFORMATICS PRIVATE LIMITED - U72900PN2007PTC130303 |
| 1977 | ATOCONN SYSTEM LABS PRIVATE LIMITED - U72900MH2017PTC292656 |
| 1978 | ATOLLX TECHNOLOGIES PRIVATE LIMITED - U72900PN2017PTC173791 |
| 1979 | ATOM E-NNOVATIVE SERVICES PRIVATE LIMITED - U72900MH2017PTC297372 |
| 1980 | ATOM TECHNOLOGIES LIMITED - U72900MH2005PLC156695 |
| 1981 | ATOMBERG TECHNOLOGIES PRIVATE LIMITED - U72900MH2012PTC229788 |
| 1982 | ATOMOS SOFTWARE PRIVATE LIMITED - U72200MH2003PTC141521 |
| 1983 | ATOMS ONLINE SERVICES PRIVATE LIMITED - U72900MH2011PTC214638 |
| 1984 | ATOMX CORPORATION PRIVATE LIMITED - U72200PN2012PTC144142 |
| 1985 | ATOP DIGITAL TECHNOLOGY CONSULTING SERVICES PRIVATE LIMITED - U72900MH2017PTC292877 |
| 1986 | ATOP INFOSERVICES PRIVATE LIMITED - U72900MH2013PTC247827 |
| 1987 | ATOS CONVERGENCE CREATORS PRIVATE LIMITED - U72900MH2012FTC237123 |
| 1988 | ATOS GLOBAL IT SOLUTIONS AND SERVICES PRIVATE LIMITED - U72900MH2017PTC292122 |
| 1989 | ATOS ORIGIN IT SERVICES PRIVATE LIMITED - U72900MH2003PTC195905 |
| 1990 | ATOZ DOMAINS SOLUTIONS PRIVATE LIMITED - U72900MH2004PTC147706 |
| 1991 | ATOZ INDIA.COM PRIVATE LIMITED - U72900MH2000PTC126739 |
| 1992 | ATR SUPERCOMPUTERS PRIVATE LIMITED - U72100MH2000PTC125533 |
| 1993 | ATREYA MATRIX PRIVATE LIMITED - U72100MH2004PTC148495 |
| 1994 | ATRINA TECHNOLOGIES PRIVATE LIMITED - U72900MH2017PTC300567 |
| 1995 | ATRIUM TECHNOLOGIES LIMITED - U72100MH2000PLC123893 |
| 1996 | ATRONIA ONLINE SERVICES PRIVATE LIMITED - U72900PN2016PTC164440 |
| 1997 | ATRONIA TECHNOSOFT PRIVATE LIMITED - U72200MH2017PTC291324 |
| 1998 | ATS SOLUTIONS PRIVATE LIMITED - U72200PN2012PTC144935 |
| 1999 | ATSON INFOTECH PRIVATE LIMITED - U72200PN2004PTC019230 |
| 2000 | ATSUYA TECHNOLOGIES PRIVATE LIMITED - U72501MH2017PTC299074 |