EXHIBIT 11
CROWN CASTLE INTERNATIONAL CORP.
COMPUTATION OF NET INCOME (LOSS)
PER COMMON SHARE
(IN THOUSANDS OF DOLLARS, EXCEPT PER SHARE AMOUNTS)

| Years Ended December 31,
| 2013 |  | 2012 |  | 2011 |  | 2010 |  | 2009
Net Income (loss) attributable to CCIC stockholders | $ | 90,111 |  |  | $ | 188,584 |  |  | $ | 171,077 |  |  | $ | (310,940 | ) |  | $ | (114,332 | )
Dividends on preferred stock and losses on purchases of preferred stock | (11,363 | ) |  | (2,629 | ) |  | (22,940 | ) |  | (20,806 | ) |  | (20,806 | )
Net Income (loss) attributable to CCIC common stockholders | 78,748 |  |  | 185,955 |  |  | 148,137 |  |  | (331,746 | ) |  | (135,138 | )
Weighted-average number of common shares outstanding (in thousands): |  |  |  |  |  |  |  |  |
Basic weighted-average number of common shares outstanding | 298,083 |  |  | 289,285 |  |  | 283,821 |  |  | 286,764 |  |  | 286,622 |
Effect of assumed dilution from potential common shares relating to stock options and restricted stock awards | 1,210 |  |  | 1,985 |  |  | 2,126 |  |  | — |  |  | — |
Diluted weighted-average number of common shares outstanding | 299,293 |  |  | 291,270 |  |  | 285,947 |  |  | 286,764 |  |  | 286,622 |
Net Income (loss) attributable to CCIC common stockholders, per common share: |  |  |  |  |  |  |  |  |
Basic | $ | 0.26 |  |  | $ | 0.64 |  |  | $ | 0.52 |  |  | $ | (1.16 | ) |  | $ | (0.47 | )
Diluted | $ | 0.26 |  |  | $ | 0.64 |  |  | $ | 0.52 |  |  | $ | (1.16 | ) |  | $ | (0.47 | )