X0303 4 2010-08-05 0 0001138639 INFINERA CORP INFN 0001469609 Martin Ronald D C/O INFINERA CORPORATION 169 JAVA DRIVE SUNNYVALE CA 94089 0 1 0 0 VP, Worldwide Sales Common Stock 2010-08-05 4 M 0 6250 0 A 6250 D Common Stock 2010-08-06 4 S 0 1706 8.9581 D 4544 D Common Stock 2010-08-09 4 M 0 12500 6.97 A 17044 D Common Stock 2010-08-09 4 M 0 4165 8.19 A 21209 D Common Stock 2010-08-09 4 S 0 21209 9.2039 D 0 D Restricted Stock Units 2010-08-05 4 M 0 6250 0 D Common Stock 6250 18750 D Restricted Stock Units Common Stock 6250 6250 D Employee Stock Option (right to buy) 6.97 2010-08-09 4 M 0 12500 0 D 2019-08-03 Common Stock 12500 37500 D Employee Stock Option (right to buy) 8.19 2010-08-09 4 M 0 4165 0 D 2016-11-23 Common Stock 4165 14585 D The reported sale was effected to satisfy the Reporting Person's tax obligation in connection with the issuance of shares pursuant to the vesting of restricted stock units on August 5, 2010. The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $8.95 to $8.9582 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (3) to this Form 4. The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $9.18 to $9.23 per share. Each restricted stock unit represents a contingent right to receive one share of INFN common stock. The remaining restricted stock units vest in three equal annual installments beginning on August 5, 2011. All of the restricted stock units vest on December 31, 2010. One-fourth of the shares subject to the option vested on August 3, 2010 and one forty-eighth of the shares shall vest monthly thereafter. The option vests in thirty-six equal monthly installments beginning on December 23, 2009. /s/ Michael O. McCarthy by power of attorney 2010-08-09