Atheros Communications Inc – Indentures Watch

from S-1/A 2 pages [Face of Certificate] Number Ac [Logo] Shares Common Stock Incorporated Under the Laws of the State of Delaware This Certificate Is Transferable in Canton, Ma Jersey City, Nj and New York, Ny Cusip 04743p 10 8 See Reverse for Certain Definitions This Certifies That Is the Owner of Fully Paid and Nonassessable Shares of Common Stock of Atheros Communications, Inc. Transferable on the Books of the Corporation by the Holder Hereof in Person or by Attorney Upon Surrender of This Certificate Properly Endorsed. This Certificate Is Not Valid Until Countersigned and Registered by the Transfer Agent and Registrar. Witness the Facsimile Seal of the Corporation and the Facsimile Signatures of Its Duly Authorized Officers. Dated: [Signature] Secretary [Seal] [Signature] President and Chief Executive Officer Countersigned and Registered: Equiserve Trust Company, N.A. Transfer Agent and Registrar By: Authorized Signature [Back of Certificate]