Exhibit 4(b) FORM OF AGREEMENT AND PLAN OF REORGANIZATION THIS AGREEMENT AND PLAN OF REORGANIZATION (the "Agreement") is made as of this [ ] day of [ ], 2009, by and among Janus Adviser Series, a Delaware statutory trust (the "JAD Trust"), on behalf...Agreement and Plan of Reorganization • May 7th, 2009 • Janus Investment Fund • Massachusetts
