STEVEN A. WILLMANN

At Amplitude Parent, LLC

• Bradford BerensonExecutive Officer
• JOANN HARRISChief Compliance Officer
• Jordan A. KolarVice President
• Ken MurphyChief Operating Officer
• MARTIN DAVIDSONChief Accounting Officer
• Nadia A. KarkarVice President

At DreamBox Learning Holding, LLC

• David A. MosseVice President
• Joann D. HarrisChief Compliance Officer
• Ken A. MurphyVice President
• Martin D. DavidsonChief Accounting Officer
• MICHAEL LAGATTAVice President
• Stephen D. RoseExecutive Officer

At EP Global Production Solutions Investment, LLC

• ADAM FLISSVICE PRESIDENT
• JOANN HARRISCHIEF COMPLIANCE OFFICER
• Ken MurphyVICE PRESIDENT
• MARTIN DAVIDSONCHIEF ACCOUNTING OFFICER
• MICHAEL LAGATTAVICE PRESIDENT
• N/A TPG VII AIV GENPAR HOLDINGS, LLCPromoter
• N/A TPG VIII EP SERIES HOLDINGS, L.P.Promoter
• STEPHEN D. ROSEExecutive Officer

At Osteon Holdings, Inc.

• ADAM FLISSExecutive Officer
• CLIVE BODEExecutive Officer
• DAVID PETTYDirector
• Jeffrey BinderDirector
• JOANN HARRISExecutive Officer
• JOHN SCHILLINGDirector
• KENDALL GARRISONDirector
• Ken MurphyExecutive Officer

At TPG Valley, L.P.

• CLIVE BODEExecutive Officer, Director
• David BondermanExecutive Officer
• DAVID C. REINTJESExecutive Officer
• JAMES G. COULTERSENIOR VICE PRESIDENT OF THE GENERAL PARTNER OF THE ISSUER
• JOHN E. VIOLAExecutive Officer, Director
• MARTIN A. DAVIDSONExecutive Officer