Iron Mountain (NYSE: IRM) priced an upsized €1.2B offering of 4.75% senior notes due 2034, up from €750M initially planned. Proceeds will be used to redeem its 3.875% GBP notes due 2025 and for general corporate purposes, including credit facility repayment. The notes will be guaranteed by subsidiaries and sold only to institutional investors under Rule 144A/Reg S.