After Paytm’s fierce gain from initial public offerings (IPO), various Indian companies are trying to raise more than $1 billion combined from initial public offerings in December. Some of the major companies planning to sell shares next month include Warburg Pincus-backed pharmacy chain MedPlus Health Services Ltd. and Healthium Medtech Ltd., a maker of surgical instruments controlled by buyout firm Apax Partners. Should their participation stand, December could become the busiest season for Indian IPOs, surpassing the $972 million raised in the same month of 2012, as per data compiled by Bloomberg.