The agricultural and biomass technology firm is looking to raise $100m when it floats, with shareholders including Monsanto set for a return on their investment.

Ceres, a US-based company producing biomass feedstocks, set the range for its initial public offering (IPO) at $21-$23 on Wednesday, and is expecting to raise about $98m from an offering of five million shares.

Ceres initially filed for the IPO in May 2011, pulled in an $11.4m round of debt financing three months later, adding to $95m in equity raised since 2007.  

Among the shareholders in Ceres is agricultural corporation Monsanto, which holds 6.1% of the stock. Additional investors…