Zayo Group Holdings, Inc. v. National Union Fire Insurance Company of Pittsburgh, PA

Superior Court of Delaware·Decided August 5, 2026·No. N23C-04-260 PRW CCLD·Published

Opinion

IN THE SUPERIOR COURT OF THE STATE OF DELAWARE

ZAYO GROUP HOLDINGS, INC., ) ) Plaintiff, ) ) v. ) C.A. No. N23C-04-260 PRW ) CCLD NATIONAL UNION FIRE INSURANCE ) COMPANY OF PITTSBURGH, PA, et al., ) ) Defendants. )

Submitted: July 20, 2026 Decided: August 5, 2026

Upon Defendant Insurers’ Motion for Summary Judgment, GRANTED.

Upon Plaintiff Zayo Group Holding’s Motion for Partial Summary Judgment, DENIED.

MEMORANDUM OPINION AND ORDER

Ryan D. Kingshill, Esquire, and Jennifer C. Wasson, Esquire, POTTER ANDERSON & CORROON LLP, Wilmington, Delaware; Tamara D. Bruno, Esquire (argued), PILLSBURY WINTHROP SHAW PITTMAN LLP, Houston, Texas; Peter M. Gillon, Esquire, PILLSBURY WINTHROP SHAW PITTMAN LLP, Miami, Florida; William C. Miller, Esquire, PILLSBURY WINTHROP SHAW PITTMAN LLP, Washington, District of Columbia, Attorneys for Plaintiff Zayo Group Holdings, Inc. Kurt M. Heyman, Esquire (argued), and Aaron M. Nelson, Esquire, HEYMAN ENERIO GATTUSO & HIRZEL LLP, Wilmington, Delaware; Scott B. Schreiber, Esquire, Arthur Luk, Esquire, and William C. Perdue, Esquire, ARNOLD & PORTER KAYE SCHOLER LLP, Washington, District of Columbia; Joshua W. McCollum, Esquire, ARNOLD & PORTER KAYE SCHOLER LLP, Houston, Texas; Zachary T. Morris, Esquire, ARNOLD & PORTER KAYE SCHOLER LLP, Los Angeles, California, Attorneys for Defendant National Union Fire Insurance Company of Pittsburgh, Pa.

Robert J. Katzenstein, Esquire, and Julie M. O’Dell, Esquire, SMITH KATZENSTEIN JENKINS LLP, Wilmington, Delaware; Daniel W. London, Esquire, and Jan H. Duffalo, Esquire, LONDON FISCHER LLP, New York, New York; Michael R. Goodstein, Esquire, and James M. Young, Esquire, BAILEY CAVALIERI LLC, Columbus, Ohio, Attorneys for Defendants ACE American Insurance Company, and Arch Insurance Company.

WALLACE, J. This insurance coverage dispute arises from a settlement reached by the Zayo

shareholders after affiliates of Digital Colony Partners acquired Zayo. Defendants

National Union Fire Insurance Company of Pittsburgh, Pa., ACE American

Insurance Company, and Arch Insurance Company (collectively, the “Insurers”)

insist that the Zayo policy’s bump-up exclusion excludes settlement coverage. The

Parties cross-move for summary judgment on the bump-up exclusion’s impact on

settlement coverage—while identifying no disputed material facts that prevent

judgment on the exclusion’s applicability. The Insurers also move for summary

judgment on Zayo’s bad-faith coverage-denial claim. Because the underlying

shareholders sued for increased consideration and the at-issue settlement amount

went to those shareholders on a per-share basis, the settlement represented an

effective increase in consideration, and the bump-up exclusion precludes coverage.

For these reasons, the Insurer’s Motion for Summary Judgment is

GRANTED, and Zayo’s Motion for Summary Judgment is DENIED.

-1- I. FACTUAL BACKGROUND1

A. THE PARTIES

Zayo is a corporation organized under the laws of Delaware with its principal

place of business in Colorado.2 Zayo is a global provider of communications

infrastructure and owns and operates fiber networks, data centers, and small-cell

sites used for 5G networks.3

Insurer National Union is a corporation organized under the laws of

Pennsylvania with its principal place of business in New York.4

Insurer ACE is a corporation organized under the laws of Pennsylvania with

its principal place of business in Pennsylvania.5

Insurer Arch is a corporation organized under the laws of Missouri with its

principal place of business in New Jersey.6

1 The Court draws the following facts from the undisputed facts in the pleadings and the documentary exhibits the Parties submitted. Since all Parties moved for summary judgment on the bump-up exclusion issue and don’t present argument that there is a factual issue relating to the bump-up clause’s applicability, the Court views all submissions accompanying the cross-motions as undisputed facts. Del. Super. Ct. Civ. R. 56(h). 2 Third Amended Compl. [hereinafter “Compl.”] ¶ 11 (D.I. 147); Aff. of William C. Miller in Supp. of Zayo’s Op. Br. [hereinafter “Miller Aff.”] Ex. 1, DECLARATIONS (D.I. 190). 3 Affidavit of Lauren Lantero in Supp. of Zayo’s Op. Br. [hereinafter “Lantero Aff.”] ¶ 5 (D.I. 190). 4 Compl., ¶ 12; National Union Answer ¶ 12 (D.I. 148). 5 Compl., ¶ 13; ACE Answer ¶ 13 (D.I. 149). 6 Compl., ¶ 14; Arch Answer ¶ 14 (D.I. 150).

-2- B. CONSORTIUM B ACQUIRES ZAYO

In May 2019, Digital Colony Partners and the EQT Infrastructure IV Fund

(collectively, “Consortium B”) acquired Zayo through a reverse triangular merger

(the “Acquisition”).7 Through the Acquisition, Zayo transitioned from a public

company to a private one.8 And Zayo’s shareholders received $35 in cash per share

of common stock.9

C. THE CARUSO ACTION10

After the Merger, former Zayo public shareholders sued Zayo’s CEO, Dan

Caruso, in the Delaware Court of Chancery.11 Mr. Caruso co-founded Zayo in 2007

and served as Zayo’s CEO and Chairman of the Board until October 2020.12 The

plaintiffs—in a one-count complaint—asserted that Mr. Caruso breached his

fiduciary duties when conducting the Acquisition.13 They alleged that Mr. Caruso

deliberately botched a public announcement to tank Zayo’s stock price and ensure

7 Aff. of Aaron M. Nelson in Supp. of Insurers’ Op. Br. [hereinafter “Nelson Op. Br. Aff.”] Ex. 4 [hereinafter “Merger Agreement”] (D.I. 189). 8 Nelson Op. Br. Aff., Ex. 8 at 1; id., Ex. 10 at 1; Lantero Aff., ¶ 7. 9 Id., Ex. 10 at 1. 10 Teamsters Local 237 Additional Security Benefit Fund et. al. v. Dan Caruso, C.A. No. 2020- 11 Nelson Op. Br. Aff., Ex. 2 [hereinafter “Caruso Compl.”]. 12 Lantero Aff., ¶ 6. 13 See generally Caruso Compl.

-3- his continued control amid mounting shareholder activism.14 In sum, those plaintiffs

averred that Mr. Caruso pursued private equity for personal reasons and took actions

that lowered Zayo’s sale price before the Acquisition.15

The Court of Chancery largely dismissed the Caruso Complaint but left intact

the plaintiffs’ claim that Mr. Caruso breached his duty of care by failing to disclose

a conversation about the Acquisition to the stockholders before the Acquisition.16

That conversation showed that Consortium B was willing to purchase Zayo shares

at a price above $35 per share.17 After some discovery, the parties mediated.18 And

they settled the Caruso Action for $27,125,000.19 National Union reimbursed Zayo

for certain defense costs incurred to defend the Caruso Action.20 But the Insurers

denied coverage for the settlement.21

D. THE POLICY AND BUMP-UP CLAUSE

National Union issued Zayo insurance policy number 02-420-67-57 (the

“Policy”) for the period of October 17, 2018, through October 17, 2019—later

14 Caruso Compl., ¶¶ 7, 71–77, 79. 15 Caruso Compl., ¶ 164. 16 Miller Aff., Ex. 7. 17 Id., Ex. 7 at 81–83. 18 Lantero Aff., ¶¶ 12–13. 19 Miller Aff., Ex. 11 at 9. 20 Lantero Aff., ¶ 11. 21 Nelson Op. Br. Aff., Ex. 28.

-4- extended to June 2020.22 Zayo obtained excess policies from ACE23 and Arch24 that,

unless otherwise noted, follow form to the Policy.25 Zayo also got a run-off

endorsement to the Policy, extending the reporting period to May 2026.26

Within the definition of Loss, the Policy contains a bump-up clause (the

“Bump-Up Clause”) excluding coverage for any settlement that represents an

effective increase in consideration gained from an acquisition:

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Zayo Group Holdings, Inc. v. National Union Fire Insurance Company of Pittsburgh, PA, (Del. Ct. App. 2026).

Zayo Group Holdings, Inc. v. National Union Fire Insurance Company of Pittsburgh, PA (Zayo Group Holdings, Inc. v. National Union Fire Insurance Company of Pittsburgh, PA) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.

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