all-holders  rule.Securities.1.  An  SEC  rule  that  prohibits  a  public  offering  by  the  issuer  of

shares to some, but not all, of the holders of a class of shares. 2. An SEC rule requiring a tender

offeror  to  make  its  offer  to  all  the  target  company’s  shareholders.  [Cases:  Securities  Regulation

52.30–52.50. C.J.S. Securities Regulation §§ 121–122, 127–128, 131–138, 140–141.] [Blacks Law 8th]