Glassman v. Unocal Exploration Corp., 777 A.2d 242 (Del. 2001)
Glassman v. Unocal Exploration is a landmark Delaware Supreme Court decision that defines the remedial and fiduciary framework governing parent–subsidiary short-form mergers under Delaware General Corporation Law § 253.
In a parent–subsidiary short-form merger under DGCL § 253, are minority stockholders entitled to litigate the merger's entire fairness (including process) in a plenary class action, or is statutory appraisal their exclusive remedy absent fraud or illegality—and what fiduciary duties, if any, constrain the parent in such a merger?
In a § 253 short-form merger, the parent corporation may eliminate the minority without a vote of the subsidiary's board or stockholders. Absent fraud or illegality, minority stockholders' exclusive remedy is statutory appraisal to obtain the fair value of their shares as of the merger date, measured under Weinberger's broad valuation principles. The parent owes a fiduciary duty of full disclosure in the merger notice to inform stockholders of all material facts necessary to decide whether to pursue appraisal. Entire fairness review (including fair dealing) does not apply to short-form mergers because the statute authorizes the parent to act unilaterally.
The Delaware Supreme Court held that, in a § 253 short-form merger, minority stockholders are limited to appraisal as their exclusive remedy absent fraud or illegality. The parent owes a fiduciary duty of full disclosure in the statutory notice, but it has no duty to establish the entire fairness of the merger, including the process. The Court affirmed the dismissal of the plenary entire fairness claims and held that any challenge to price must proceed in appraisal, with equitable relief available only upon proof of fraud, illegality, or materially misleading disclosures.
Glassman is a cornerstone of Delaware law on squeeze-out mergers. It draws a bright doctrinal line: long-form freeze-outs can trigger entire fairness review, but short-form mergers under § 253 do not. Instead, appraisal is the exclusive remedy, channeling price disputes into a specialized valuation proceeding. The decision also crystallizes the parent's limited fiduciary obligations in short-form mergers—chiefly, a duty of full disclosure in the merger notice. Glassman informs transaction planning (e.g., choosing between long-form and short-form structures), litigation strategy (whether to pursue appraisal versus equitable claims), and subsequent case law on tender offers followed by short-form mergers (e.g., Siliconix and Pure Resources) and on remedies for disclosure violations (e.g., Berger v. Pubco). For students, it exemplifies how statutory architecture shapes fiduciary duties and remedies in corporate law.