The primary market is headed for another busy stretch, with as many as 20 IPOs either opening for subscription or lined up to hit the market between September 28 and September 30. The list includes a mix of mainboard and SME issues, with offer sizes ranging from around Rs 14 crore to more than Rs 218 crore.GMPs show a wide divergence in investor interest. Vans Electroengineerings currently commands the highest GMP at around 38%, followed by SRIT India at 24% and EverestIMS Technologies at 24%. Several other issues are yet to see any grey market premium. GMP is an unofficial indicator and can change sharply before listing. IPO Pipeline