MEMORANDUM **
Taisei Construction Corporation (“Taisei”) appeals from the district courts entry of summary judgment in favor of Landmark American Insurance Company (“Landmark”).
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We have jurisdiction pursuant to 28 U.S.C. § 1291, review the district courts rulings on the parties’ cross-motions for summary judgment de novo, and vacate and remand. See Guatay Christian Fellowship v. Cnty. of San Diego, 670 F.3d 957, 970 (9th Cir. 2011).
Taisei argues that the district court erred in entering summary judgment in favor of Landmark because the court improperly applied the substantial prejudice standard in assessing whether Taisei breached its duty of cooperation under the insurance policies.
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We agree. To assert a defense to its duty to defend based on Taiseis breach of the insurance policies’ cooperation clauses, Landmark had the burden to prove that it suffered substantial prejudice as the result of the breach. Nw. Title Sec. Co. v. Flack, 6 Cal. App. 3d 134, 140–41, 85 Cal.Rptr. 693 (1970) (“[B]reach cannot be a valid defense unless the insurer was substantially prejudiced thereby.”) (citing Campbell v. Allstate Ins. Co., 60 Cal. 2d 303, 305, 32 Cal.Rptr. 827, 384 P.2d 155 (1963)). “[P]rejudice is not presumed as a matter of law from [ ] breach,” rather, “actual prejudice must be shown.” Id. at 141, 85 Cal.Rptr. 693 (citing Billington v. Interinsurance Exch. of S. Cal., 71 Cal.2d 728, 79 Cal.Rptr. 326, 456 P.2d 982, 987 (1969) (in bank)). For example, substantial prejudice may be found when the insurer can demonstrate that, absent the breach, “there [is] a substantial likelihood the trier of fact would have found in the insureds favor,” id. at 141–42, 85 Cal.Rptr. 693, or that the insured “could have settled the case for a ․ smaller sum than that for which [the] insured ultimately settled the claim,” id. at 143, 85 Cal.Rptr. 693.
In granting Landmarks motion for summary judgment, the district court incorrectly relied on our courts unpublished memorandum disposition, Cybernet Ventures, Inc. v. Hartford Ins. Co. of the Midwest, 168 Fed. Appx. 850, 852 (9th Cir. 2006),
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to conclude, as a general principle, that “[i]nsurers are substantially prejudiced when, before trial, an insured does not allow counsel appointed by the insurer to conduct the defense, or otherwise fails to cooperate with the insurers defense.” Relying on that principle alone, the district court found that Taiseis request that the Lee Firm withdraw as counsel and demand that Youngerman & McNutt be appointed caused Landmark substantial prejudice because Landmark was unable to control the defense. In other words, the district court presumed substantial prejudice from breach rather than engaging in an independent analysis of actual prejudice. Similarly, in denying Taiseis motion for summary judgment, the district court concluded that there was no genuine dispute of material fact that Taisei breached the policies’ cooperation clauses without engaging in a separate actual prejudice analysis.
The issue of substantial prejudice is one of fact to be resolved by the trial court in the first instance. Flack, 6 Cal. App. 3d 134 at 141, 85 Cal.Rptr. 693. Summary judgment cannot properly be based on those presumptions, especially in the factual context here, where it is far from undisputed based on the existing record that Landmark did actually suffer substantial prejudice.
Accordingly, we vacate the judgment and remand to the district court for further proceedings. That could include consideration of whether there is a genuine issue of material fact concerning substantial prejudice.
The costs of appeal are taxed against Landmark and awarded to Taisei as the substantially prevailing party. See Corbello v. DeVito, 777 F.3d 1058, 1068 (9th Cir. 2015); Fed. R. App. P. 39.
VACATED AND REMANDED.
FOOTNOTES
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. Although the Opening Briefs “Issues Presented” section purports to pose the question of whether the district court erred in denying Taiseis own motion to dismiss and its “Standard of Review” section sets forth the standard for denial of a motion to dismiss, Taiseis argument is framed entirely in terms of what it contends was the district courts error in entering summary judgment in favor of Landmark. Accordingly, Taisei has waived the argument that the district court erred in denying its motion to dismiss. See Cal. Pac. Bank v. Fed. Deposit Ins. Corp., 885 F.3d 560, 570 (9th Cir. 2018); see also Fed. R. App. P. 28(a)(8)(A).
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. The district court granted summary judgment in favor of Landmark on the declaratory relief claim, determining that Taisei breached the insurance policies’ cooperation clauses. The district court then relied on that determination to grant summary judgment in favor of Landmark on the breach of contract and equitable reimbursement claims and to deny Taiseis motion. The district court concluded that Taiseis breach of the cooperation clauses constituted a breach of contract and that the breach extinguished Landmarks duty to defend under the insurance policies, thus entitling Landmark to reimbursement of expenses incurred after the breach.
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. An unpublished memorandum disposition is not precedent, and a memorandum disposition issued before January 1, 2007, may not be cited unless it falls within one of the exceptions set forth in Ninth Circuit Rule 36-3(c). None of those exceptions applies here. See Ninth Cir. R. 36-3.