PRE 14A : Preliminary Proxy Statement not related to a contested
matter or merger/acquisition. It is filed by company before filing
of DEF 14A. Some companies only file PRE 14A. They file PRE 14A if
DEF 14A may takes time to file.
DEF 14A: Definitive Proxy Statements. It contains full
information. Every company should file DEF 14A.