The Cellnex sale would follow 5.3 billion euros of Spanish IPOs in the first quarter, the most for a three-month period since at least 1985, according to data compiled by Bloomberg. Cellnex is the biggest independent mobile-tower operator in Europe, with 7,472 base-station sites in Spain and 7,698 in Italy, according to today's filing. Cellnex aims to continue expanding its operations following the initial public offering, Abertis said. The joint global coordinators of the IPO are Morgan Stanley, Goldman Sachs Group Inc. and CaixaBank SA. Abertis's market value is 15.4 billion euros. BLOOMBERG