OPTIMER PHARMACEUTICALS INC

Quarterly Report for period ending 2013-06-30

Quarterly Report for period ending 2013-03-31

Annual Report for period ending 2012-12-31

Notice under Rule 12b25 of inability to timely file all or part of a Form 10-K, 10-KSB, or 10-KT for period ending 2012-12-31

Quarterly Report for period ending 2012-09-30

Quarterly Report for period ending 2012-06-30

Quarterly Report for period ending 2012-03-31

Annual Report for period ending 2011-12-31

Quarterly Report for period ending 2011-09-30

Quarterly Report for period ending 2011-06-30

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Order Granting Confidential Treatment

Order Granting Confidential Treatment

Notice of termination of registration of a class of securities under Section 12(b)

Notice of Effectiveness

Post-effective amendment to a registration statement that is not immediately effective upon filing

Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities

Order Granting Confidential Treatment

Order Granting Confidential Treatment

Annual report to security holders

None

Flynn James E: Major Shareholders

CHANG JOSEPH Y: Statement of changes in beneficial ownership of securities

Chang Michael N: Statement of changes in beneficial ownership of securities

AUERBACH MARK: Statement of changes in beneficial ownership of securities

ZERBE ROBERT L MD: Statement of changes in beneficial ownership of securities

GREBOW PETER E: Statement of changes in beneficial ownership of securities

Newman Stephen L: Statement of changes in beneficial ownership of securities

MCKINNELL HENRY A: Statement of changes in beneficial ownership of securities

Gorbach MD Sherwood: Statement of changes in beneficial ownership of securities

Webster Stephen W: Statement of changes in beneficial ownership of securities

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Filing under Securities Act Rule 425 of certain prospectuses and communications in connection with business combination transactions

Filing under Securities Act Rule 425 of certain prospectuses and communications in connection with business combination transactions

Definitive additional proxy soliciting materials including Rule 14(a)(12) material. Note: Submission type DEFA14A can be filed as part of Form 8-K. For filers subject to 8-K filing requirements, we recommend the use of the 8-K combined form type as the easiest method for fulfilling your filing requirement for both forms.

Definitive proxy statement relating to a merger, acquisition, or disposition

Definitive additional proxy soliciting materials including Rule 14(a)(12) material. Note: Submission type DEFA14A can be filed as part of Form 8-K. For filers subject to 8-K filing requirements, we recommend the use of the 8-K combined form type as the easiest method for fulfilling your filing requirement for both forms.

Definitive additional proxy soliciting materials including Rule 14(a)(12) material. Note: Submission type DEFA14A can be filed as part of Form 8-K. For filers subject to 8-K filing requirements, we recommend the use of the 8-K combined form type as the easiest method for fulfilling your filing requirement for both forms.

Definitive additional proxy soliciting materials including Rule 14(a)(12) material. Note: Submission type DEFA14A can be filed as part of Form 8-K. For filers subject to 8-K filing requirements, we recommend the use of the 8-K combined form type as the easiest method for fulfilling your filing requirement for both forms.

Definitive additional proxy soliciting materials including Rule 14(a)(12) material. Note: Submission type DEFA14A can be filed as part of Form 8-K. For filers subject to 8-K filing requirements, we recommend the use of the 8-K combined form type as the easiest method for fulfilling your filing requirement for both forms.

Definitive additional proxy soliciting materials including Rule 14(a)(12) material. Note: Submission type DEFA14A can be filed as part of Form 8-K. For filers subject to 8-K filing requirements, we recommend the use of the 8-K combined form type as the easiest method for fulfilling your filing requirement for both forms.

Definitive additional proxy soliciting materials including Rule 14(a)(12) material. Note: Submission type DEFA14A can be filed as part of Form 8-K. For filers subject to 8-K filing requirements, we recommend the use of the 8-K combined form type as the easiest method for fulfilling your filing requirement for both forms.

Definitive additional proxy soliciting materials including Rule 14(a)(12) material. Note: Submission type DEFA14A can be filed as part of Form 8-K. For filers subject to 8-K filing requirements, we recommend the use of the 8-K combined form type as the easiest method for fulfilling your filing requirement for both forms.

Definitive proxy statements