Sera Prognostics Inc. Watch

from S-3 37 pages Sera Prognostics, Inc. Issuer and [ ] Trustee Indenture Dated as of [ ] Subordinated Debt Securities

from S-3 37 pages Sera Prognostics, Inc. Issuer and [ ] Trustee Indenture Dated as of [ ] Senior Debt Securities

from 10-K 4 pages Description of Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934, as Amended

from SC 13D 6 pages Sera Prognostics, Inc. Public Offering of Common Stock

from S-1/A 2 pages # D E L a W a R E # Seal S E R a Prog N O Stics, in C .. Corp O Ra Te January 17, 2008 Sera Fully Paid and Nonassessable Shares of Class a Common Stock, $0.0001 Par Value Per Share, of Sera Prognotics, Inc. Transferable on the Books of the Corporation in Person or by Duly Authorized Attorney Upon Surrender of This Certificate Properly Endorsed. This Certificate Is Not Valid Until Countersigned by the Transfer Agent and Registered by the Registrar. Witness the Facsimile Seal of the Corporation and the Facsimile Signatures of Its Duly Authorized Officers. Dated: This Certifies That Is the Record Holder of Incorporated Under the Laws of the State of Delaware Countersigned and Registered: American Stock Transfer & Trust Company, LLC (Brooklyn, Ny) Transfer Agent and Registrar By: Authorized Signature President & Chief Executive Officer Chief Financial Officer Cusip 81749d 10 7 See Reverse for Certain Definitions and Legends Sample Certificate

from S-1 47 pages Fourth Amended and Restated Investors’ Rights Agreement

from S-1 11 pages Warrant to Purchase Common Stock

from S-1 12 pages Warrant to Purchase Common Stock

from S-1 11 pages Warrant to Purchase Common Stock

from DRS/A 47 pages Fourth Amended and Restated Investors’ Rights Agreement

from DRS/A 11 pages Warrant to Purchase Common Stock

from DRS/A 12 pages Warrant to Purchase Common Stock

from DRS/A 11 pages Warrant to Purchase Common Stock

from DRS 12 pages Warrant to Purchase Common Stock

from DRS 11 pages Warrant to Purchase Common Stock