| 1976 | SIGNOR PUMPS PRIVATE LIMITED - U29120WB1997PTC085753 |
| 1977 | SIKANY SUSHAN PRODUCT PVT LTD - U29130WB1981PTC034206 |
| 1978 | SILICON AIR-CONDITIONING CO. PRIVATE LIM ITED - U29306WB1997PTC082546 |
| 1979 | SILVAS MACHINERIES PRIVATE LIMITED - U29141WB1999PTC090413 |
| 1980 | SILVER ENGINEERING PRIVATE LIMITED - U29253WB2009PTC139132 |
| 1981 | SIMPLETEC AUTOMATICS PVT.LTD. - U29130WB1994PTC064055 |
| 1982 | SIMPLETEC EQUIPMENTS PRIVATE LIMITED - U29253WB2009PTC132036 |
| 1983 | SIMPLEX EQUIPMENTS PRIVATE LIMITED - U29100WB2005PTC105763 |
| 1984 | SIMPLEX FORGE PVT.LTD. - U29141WB1995PTC074858 |
| 1985 | SINCERE TECHNOLOGY PVT. LTD. - U29219WB1991PTC052510 |
| 1986 | SINGH OLYMPICS PVT LTD - U29309WB1981PTC033828 |
| 1987 | SINHA ENTERPRISES PRIVATE LIMITED - U29210WB2011PTC166749 |
| 1988 | SINO-INDIAN AGRO MACHINERY COMPANY PVT. LTD. - U29219WB1993PTC059719 |
| 1989 | SIX FOLD TECHNOLOGY PRIVATE LIMITED - U29253WB2015PTC206691 |
| 1990 | SIX STARS SALES PVT LTD - U29219WB1975PTC029902 |
| 1991 | SK NASIRUDDIN BIRI MERCHANTS PVT LTD - U29212WB1968PTC027273 |
| 1992 | SK PLASTOCRATS & ENGINEERS PRIVATE LIMITED - U29199WB2004PTC099983 |
| 1993 | SKAITS ENGINEERING INDUSTRIES PVT LTD - U29219WB1968PTC027269 |
| 1994 | SKY CORP MINERALS PRIVATE LIMITED - U29246WB1996PTC081492 |
| 1995 | SKYLARK DRONES PRIVATE LIMITED - U29253WB2015PTC207178 |
| 1996 | SLIPFORM PROJECTS PRIVATE LIMITED - U29253WB2009PTC137853 |
| 1997 | SMARTLYF TECHNOLOGIES PRIVATE LIMITED - U29309WB2017PTC219011 |
| 1998 | SMARTPOWER AUTOMATION PRIVATE LIMITED - U29309WB2017PTC222160 |
| 1999 | SMEW TECHNOLOGIES PRIVATE LIMITED - U29309WB2017PTC221262 |
| 2000 | SMITH MOTOR TOOLS PVT LTD - U29130WB1991PTC051858 |