R1 RCM Merger Litigation — Court let the controlling-stockholder claim proceed against the buyout group

Case
In re R1 RCM Inc. Merger Litigation
Court
Delaware Court of Chancery
Judge
J. Travis Laster, Vice Chancellor
Date Decided
October 28, 2026
Docket No.
Consolidated C.A. No. 2025-1067-JTL
Topics
Controlling Stockholders; Fiduciary Duty; Merger Litigation; DGCL Section 144
Source
Read the full opinion

Background

TCP-ASC ACHI Series LLLP, or TA, was a joint venture between private-equity firm TowerBrook Capital Partners L.P. and nonprofit health system Ascension Health Alliance. After a 2022 merger, TA held 29.4% of R1 RCM Inc.’s outstanding common stock plus warrants that brought its fully diluted ownership to approximately 35.7%. An investor-rights agreement entitled TA, while meeting a specified ownership threshold, to nominate a majority of R1’s board and required R1 to nominate those designees and use commercially reasonable efforts to secure their election.

In 2024, TA competed with New Mountain Capital to acquire R1 and submitted the higher final bid of $14.30 per share. R1’s board approved TA’s proposal, stockholders approved the merger without a majority-of-the-disinterested-stockholders condition, and the deal closed in November 2024. Former stockholders later alleged that TA, TowerBrook, and Ascension controlled R1, stood on both sides of the transaction, and breached their fiduciary duty of loyalty by extracting an unfair deal.

The TA defendants moved under Court of Chancery Rule 12(b)(6) to dismiss Count I solely on the ground that TA could not qualify as a controlling stockholder. The court therefore addressed whether TA met the statutory definition of a controlling stockholder enacted in the 2025 amendments to Section 144 of the Delaware General Corporation Law.

The Court’s Holding

The court held that the complaint supported a reasonable inference that TA was a controlling stockholder under Section 144’s board-majority trigger. TA’s contractual right to nominate a majority of R1’s directors, combined with R1’s obligation to nominate those designees and use commercially reasonable efforts to elect them, gave TA the right to cause the election of a board majority. Neither the requirement that TA’s nominees be reasonably acceptable to the nominating committee nor the provisions designed to maintain a majority-independent board defeated that conclusion.

The court rejected the plaintiffs’ alternative reliance on the statute’s non-majority trigger. TA did not meet that trigger’s one-third voting-power floor when the alleged misconduct occurred. Warrants could not be counted on a fully diluted basis, and TA’s later exercise of the warrants shortly before closing did not establish controller status at the time of the challenged actions.

The court also rejected the defendants’ argument that satisfying the board-majority trigger merely opened the door to a separate common-law control analysis. Each of Section 144’s three controller triggers operates as a bright-line “toggle switch”: satisfying any one of them establishes controlling-stockholder status without additional allegations of common-law control. Because the defendants offered no other basis for dismissal, the court denied their motion to dismiss Count I.

Key Takeaways

  • A contractual right to nominate a board majority, coupled with the corporation’s obligation to support the nominees’ election, can satisfy Section 144’s board-majority controller trigger.
  • Unexercised warrants do not count toward the non-majority trigger’s one-third voting-power floor on a fully diluted basis.
  • Controller status must exist when the challenged fiduciary conduct occurs; acquiring sufficient voting power shortly before closing does not retroactively create it.
  • Each statutory controller trigger is independently sufficient, so a plaintiff who satisfies one need not also plead common-law control.

Why It Matters

The opinion provides an early interpretation of the controlling-stockholder definition added to DGCL Section 144 in 2025. It treats the statutory tests as bright-line alternatives and confirms that board-nomination agreements can create controller status even when the stockholder owns less than one-third of the outstanding voting power.

The ruling also draws an important distinction between actual voting power and fully diluted economic ownership. Investors and corporations negotiating governance rights must evaluate majority-nomination provisions and election-support obligations independently from ownership percentages because those contractual rights may carry fiduciary consequences.

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