X0306 4/A 2014-06-10 2014-06-12 0 0001299130 PACIFIC BIOSCIENCES OF CALIFORNIA, INC. PACB 0001503381 Ericson William W. C/O MOHR DAVIDOW VENTURES 3000 SAND HILL ROAD, #3-290 MENLO PARK CA 94025 1 0 0 0 Common Stock 2014-06-10 4 P 0 68921 5.2112 A 4667318 I MDV VII LP, nom for MDV VII LP, MDV VII Leaders' Fund LP, MDV ENF VII (A) LP, and MDV ENF VII (B) LP Seventh MDV Partners, L.L.C. is the general partner of (i) MDV VII, L.P., as nominee for MDV VII, L.P., MDV VII Leaders' Fund, L.P., MDV ENF VII(A), L.P, and MDV ENF(B), L.P., (ii) MDV VII, L.P., (iii) MDV ENF VII (A), L.P., (iv) MDV ENF VII (B), L.P. and (v) MDV VII Leaders' Fund, L.P. (the "MDV VII Funds") and has sole voting and investment power over the shares. William Ericson is a general partner with Mohr Davidow Ventures, and may be deemed to indirectly beneficially own the shares affiliated with the MDV VII Funds. Mr. Ericson disclaims beneficial ownership of the shares held by the MDV VII Funds except to the extent of any pecuniary interest therein. /s/ William W. Ericson 2014-08-19