#takeover_bid  an offer to buy shares in order to take over the company
  supertype:  #tender_offer  an offer to buy shares in a corporation (usually above the market price) for cash or securities or both
  subtype:  #two-tier_bid  a takeover bid where the acquirer offers to pay more for the shares needed to gain control than for the remaining shares
  subtype:  #any-and-all_bid__anyandallbid  a takeover bid where the acquirer offers to buy any and all shares outstanding

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