Unocal Corp. v. Mesa Petroleum Co.
493 A.2d 946 (Del.Supr. 1985)

  • Mesa made a hostile takeover bid (aka a tender offer) for Unocal for $54 a share.
    • Mesa warned that if people didn't take the offer, and Mesa got control of Unocal, Mesa would forcibly cash-out all those who wouldn't sell, but instead of cash they'd get risky junk bonds in exchange for their stock.
  • In response, Unocal's directors offered to repurchase its stock from shareholders for $72 a share (aka a self-tender offer), but excluded Mesa from the offer.
    • Since shareholders would rather sell their stock to Unocal for $72 than Mesa for $54, the deal ensured that Unocal would not be owned by Mesa. However it did incur a lot of debt.
  • Mesa sued.
    • Mesa argued that the Unocal directors were acting not in the best interest of the corporation, but solely to save their jobs as directors.
    • The directors argued that their actions were covered by the business judgment rule.
  • The Trial Court found for Mesa. The directors appealed.
    • The Trial Court found that a selective exchange (aka offering to buy stock from everyone except Mesa) was not allowed under Delaware law because it discriminates among existing shareholders and that fails the fairness test.
  • The Delaware Supreme Court reversed.
    • The Delaware Supreme Court noted that there is an inherent conflict of interest when directors use a takeover defense to stop someone like Mesa from taking over the corporation.
    • The Court found that when there is a takeover defense, the directors are under an "enhanced duty" to show that their decisions are meant to further the welfare of the corporation and not just to protect their jobs.
      • Basically, in order to benefit from the business judgment rule, the directors must demonstrate that it was responding to a legitimate threat to corporate policy and effectiveness, and that its actions were "reasonable in relation to the threat posed."
      • Note that this is an intermediate test partway between the standard business judgment rule, and the entire fairness test.
        • See Weinberger v. UOP, Inc. (457 A.2d 701 (1983)).
    • In this case, the Court found that Unocal's directors had reasonable grounds for believing that Mesa represented a danger to the continued existence of Unocal, and if Mesa took over, there would be a serious risk to the shareholders. Therefore their takeover defense was allowed under the "enhanced duty" business judgment rule.
  • Basically, this case said that there is a two-pronged test that directors must satisfy when they take action to deter a potential hostile takeover:
    • They must have reasonable grounds to believe that a danger to corporate policy and effectiveness exists, and
    • That the defensive measure adopted is proportionate to the threat posed.