X0303 4 2010-11-15 0001288469 MAXLINEAR INC MXL 0001225484 PRESIDIO MANAGEMENT GROUP VIII L L C 2735 SAND HILL ROAD MENLO PARK CA 94025 0 0 1 0 0001225480 ROOT JONATHAN D 2735 SAND HILL ROAD MENLO PARK CA 94025 0 0 1 0 0001316575 Rust Christopher J 2735 SAND HILL ROAD MENLO PARK CA 94025 0 0 1 0 0001474322 Tansey Casey M 2735 SAND HILL ROAD MENLO PARK CA 94025 0 0 1 0 0001048637 YOUNG PHILIP M 2735 SAND HILL ROAD MENLO PARK CA 94025 0 0 1 0 Class A Common Stock ($0.0001 par value) 2010-11-15 4 S 0 1473 10.517 D 2917 I Directly owned by EP VIII-A Class A Common Stock ($0.0001 par value) 2010-11-15 4 S 0 747 10.517 D 1478 I Directly owned by EP VIII-B The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.50 to $10.57, inclusive. The reporting persons undertake to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote 1 to this Form 4 See additional Form 4 filed by Presidio Management Group VIII, LLC ("PMG VIII") for additional members of this joint filing. PMG VIII is the general partner of US Venture Partners VIII, L.P. ("USVP VIII"), USVP Entrepreneur Partners VIII-A, L.P. ("EP VIII-A"), USVP Entrepreneur Partners VIII-B, L.P. ("EP VIII-B"), and USVP VIII Affiliates Fund, L.P. ("AFF VIII"), and Irwin Federman, Winston S. Fu, Steven M. Krausz, David E. Liddle, Jonathan D. Root, Christopher Rust, Casey M. Tansey, and Philip M. Young, the managing members of PMG VIII, may be deemed to share voting and dispositive power over the shares held by USVP VIII, EP VIII-A, EP VIII-B and AFF VIII. Such persons and entities disclaim beneficial ownership of shares held by USVP VIII, EP VIII-A, EP VIII-B and AFF VIII except to the extent of any pecuniary interest therein. Michael P. Maher - Attorney in fact for each reporting person 2010-11-17