Karpavičius, S.Suchard, J.2018-11-132018-11-132018International Review of Financial Analysis, 2018; 56:73-841057-52191873-8079http://hdl.handle.net/2440/115991We examine how institutional ownership, which reflects the informational efficiency of stock prices (Boehmer and Kelley, 2009), impacts the seasoned equity offering (SEO) issue method choice between shelf offerings and traditional SEOs. We find that firms with greater institutional ownership, particularly long term ownership, tend to choose shelf offerings. We control for issue method choice and find that the offer discount decreases with institutional ownership for both shelf and traditional issuers and that higher institutional ownership reduces direct issue costs and is related to a shorter due diligence process for traditional SEOs. This suggests that underwriters are more likely to be able to perform the certification function (and with less effort) for issuers whose stock is priced more efficiently.en© 2018 Elsevier Inc. All rights reserved.Shelf registration; seasoned equity offering; institutional ownershipJournal article003008130510.1016/j.irfa.2017.12.0090004260862000062-s2.0-85040324316394163