EDGAR Filing Documents for 0001193805-13-001016

Form SC 13G - Statement of Beneficial Ownership by Certain Investors:

SEC Accession No. 0001193805-13-001016

Filing Date

2013-05-24

Accepted

2013-05-24 16:24:47

Documents

Group Members

DEERFIELD INTERNATIONAL MASTER FUND, L.P.DEERFIELD MANAGEMENT COMPANY, L.P.DEERFIELD MGMT, L.P.DEERFIELD PARTNERS, L.P.

Document Format Files

Seq	Description	Document	Type	Size
1		e610954_sc13g-optimer.htm	SC 13G	237130
	Complete submission text file	0001193805-13-001016.txt		238555

Mailing Address 101 HUDSON STREET SUITE 3501 JERSEY CITY NJ 07302

Business Address 101 HUDSON STREET SUITE 3501 JERSEY CITY NJ 07302 (201) 333-8819

OPTIMER PHARMACEUTICALS INC (Subject) CIK: 0001142576 (see all company filings)

IRS No.: 330830300 | Fiscal Year End: 1231
Type: SC 13G | Act: 34 | File No.: 005-82752 | Film No.: 13872397
SIC: 2834 Pharmaceutical Preparations

Mailing Address 780 THIRD AVENUE 37TH FLOOR NEW YORK NY 10017

Business Address

Flynn James E (Filed by) CIK: 0001352546 (see all company filings)

Type: SC 13G