ORDER

Lennar Mare Island, LLC (LMI), CH2M Hill Constructors, Inc. (CCI), and Steadfast Insurance Company dispute their obligations in the clean-up of Mare Island, a former U.S. Navy base. Several motions'are pending: LMI’s motions for partial summary judgment as to the definition of “Government Authority” and “Known Pollution Condition”; Steadfast’s motions for leave to amend its counterclaim and for relief from the magistrate judge’s discovery order; and CCI’s motion to disqualify Steadfast’s counsel. On February 27, 2015, the court held a hearing on CCI’s motion to disqualify, as this motion must be decided before the others. Ryan Werner appeared 'for Plaintiff Lennar Mare Island, LLC. Deborah Ballati and Amanda Hairston appeared for CCI. Merri Baldwin, Ethan Miller, and Brandon Rai-ney appeared for Steadfast Insurance Company. After considering the parties’ briefing and arguments presented at the hearing, the court GRANTS the motion to disqualify.

I. BACKGROUND

A. General Background

The United States Navy operated a base at Mare Island in Vallejo, California from 1852 until 1996. Joint Stmt. Discovery Dispute 2, ECF No. 63. After a century of use, the land had become contaminated. Id. After closing the base, the Navy conveyed the land to the City of Vallejo, and Vallejo in turn conveyed a portion of the base to LMI. Id. With the land came obli *1104 gations to investigate and clean up pollution. Id. at 2-3. LMI entered a contract with CCI in which CCI agreed, first, for a fixed price, to investigate and clean up certain known contamination in LMI’s parcel of land, and second, to perform other clean-up tasks for additional compensation. Id. at 3. The contract price included money the Navy had provided to purchase three environmental insurance policies issued by Steadfast. Id. Two of these insurance policies are the subject of this lawsuit: (1) the Remediation Stop Loss or RSL Policy, now expired, which provided coverage to CCI should the cost of its cleanup of “Known Pollution Conditions” exceed a specific amount; and (2) the Environmental Liability Insurance or ELI Policy, which provides coverage to LMI for the cost of remediating pollution other than the Known Pollution Conditions, along with coverage for certain other conditions. Id.

In this action, LMI alleges Steadfast has caused it several million dollars in damages by refusing to pay for claims under the ELI policy or by delaying payments. Id. at 5; First Am. Compl. ¶¶ 16-17, 25-26, 30-31, ECF No. 22. It also seeks declaratory relief that Steadfast must pay certain submitted claims. First Am. Compl. ¶ 34. Steadfast removed the case to federal court in August 2012. Not. Removal 1-2, ECF No. 1. A few days after removal, Steadfast answered LMI’s complaint and asserted a counterclaim against both LMI and CCI, seeking declaratory relief in Steadfast’s favor. Answer, ECF No. 4; Counterclaim, ECF No. 5. At this time, Steadfast was represented by attorneys with the firm of Sinott, Puebla, Cam-pagne & Curet, APLC. Counterclaim 1, 5, ECF No. 5. In August 2014, several attorneys from Hogan Lovells U.S. LLP associated as additional counsel for Steadfast. Notices of Appearance, ECF Nos. 126-129.

In December 2014 and January 2015, the parties filed a flurry of motions. On December 19, 2014, LMI moved for partial summary judgment of the definition of “Governmental Authority.” Mot. Summ. J., ECF No. 160. On the same day, Steadfast moved to amend its counterclaim. 1 Mot. Am. Counterclaim, ECF No. 161. On January 16, 2015, Steadfast moved for partial relief from the magistrate judge’s discovery order. ECF No. 176. On the same day, CCI moved to disqualify Hogan Lovells. ECF No. 180. Finally, on January 30, 2015, LMI moved for partial summary judgment of the definition of “Known Pollution Condition.” ECF No. 187. As noted, the court held a hearing on February 27, 2015, but heard arguments only on the motion to disqualify. After the hearing, the court allowed Steadfast to submit a sur-reply to address additional evidence offered for the first time in CCI’s reply brief on disqualification. See Ballati Reply Decl., ECF No. 220; Wright Reply Decl., ECF No. 223; Brierly Deck, ECF No. 224; McCoy Reply Deck, ECF No. 225; Minute Order, ECF No. 242. Steadfast filed its sur-reply on March 18, 2015. ECF No. 251.

B. Hogan Lovells’s Relationship to the Parties

In November 2005, Hogan Lovells’s predecessor firm, Hogan & Hartson LLP, began representing CCI’s parent corporation, CH2M HILL Companies, Ltd. (CH2M). Dover Deck ¶ 3, ECF No. 199. Over the next several years, Hogan Lo-vells represented CH2M in several capacities. Thomas McCoy, CH2M’s general counsel since September 2014, submitted a *1105 declaration describing the matters in which Hogan Lovells provided legal advice to CH2M and its subsidiaries:

McCoy Deck ¶¶2, 5, ECF No. 182. Mr. McCoy attached to his declaration a copy of an October 2014 presentation from Hogan Lovells about the firm’s representation of CH2M. See id. Ex. A, ECF No. 182-1. The presentation, although mostly redacted, describes Hogan Lovells’s assistance “with the purchase of the then Lockheed Hanford company,” “the acquisition of Halcrow in 2011,” and “on a variety of regulatory matters (government contracts, export control, FCPA, sanctions, nuclear regulatory) in both the U.S. and E.U. as well as on corporate matters in both the U.S. and U.K.” Id. Ex. A, at 2. Hogan Lovells has provided legal advice to Michael Szomjassy, the CH2M board member responsible for the Mare Island project,' who negotiated with the other participants in that project. Wright Deck ¶10, ECF No. 181. CH2M’s general counsel, board of directors, and senior management consider Hogan Lovells to be CH2M’s “top strategic law firm.” McCoy Deck ¶ 8. Mr. McCoy’s declaration reports CH2M “is wholly dependent on Hogan Lo-vells for nearly all of the most important corporate and regulatory issues currently facing the company.” Id. Hogan Lovells billed CH2M approximately $1 million for its work in 2014. Id. ¶ 9. Most of its work for CH2M has been in Colorado and Washington, D.C. Dover Deck ¶ 2.

In this case, in July 2014, after an unsuccessful settlement conference, Steadfast’s counsel at the time, David Cam-pagne, told Steadfast his firm did not have the resources to continue as lead counsel. Campagne Deck ¶¶3-4, ECF No. 198; Duggan Deck ¶ 3, ECF No. 200. Steadfast began seeking new counsel and was referred to Ethan Miller. Duggan Deck ¶ 3. Mr. Miller had represented Steadfast previously in’ a similar matter and had since joined Hogan Lovells, a firm with resources Steadfast considered sufficient for this case. Id. Steadfast believes its decision to hire Hogan Lovells was correct, particularly thanks to Mr. Miller’s familiarity with Steadfast’s employees and attorneys, many of whom it believes will be deposed here. Id. ¶4. Thomas Duggan, the Steadfast team manager for environmental claims, considers this, litigation “one of the largest matters Steadfast Environmental Claims has faced in many years.” Id. ¶¶ 1-2. He believes that should he lose the assistance of Hogan Lovells and Mr. Miller, “Steadfast will be significantly hampered in its ability to meet theserious allegations in this case.” Id. % 5

Steadfast contacted Mr. Miller about this case in July 2014. Miller Deck ¶ 4, ECF No. 20. Hogan Lovells checked for conflicts of interest and discovered it represented CH2M, although at the time the firm was not providing legal services directly to CCI. Id.; Dover Deck' ¶ 6. Hogan Lovells’s only engagement directly with CCI occurred in 2008, when CCI was a joint client- with another CH2M affiliate, CH2 Savannah River Company. Dover Deck ¶ 6. In that matter, a mediation effort, Hogan Lovells advised CCI in a fee *1106 dispute after CCI had remediated a former government site. Id.; Wright Decl. ¶ 9. The matter did not involve any insurance or coverage disputes. Dover Decl. ¶ 6; Dover Sur-Reply Decl. ¶ 5, ECF No. 251-3.

Agnes Dover, the Hogan Lovells partner who works most with CH2M, learned Steadfast had contacted Mr. Miller and then called Kirby Wright, CH2M’s lead on litigation matters. Dover Decl. ¶¶ 7-8. She believed-Hogan. Lovells’s representation of Steadfast would create no conflict of interest thanks to a prospective waiver of conflicts in CH2M’s original engagement letter, but wanted Mr. Wright to know about it. Id. ¶8. Mr. Wright remembers he said CH2M was a company that tended to honor its agreements and would review the engagement letter. Wright Decl.. ¶3; Dover Sur-Reply Decl. ¶ 6. Ms. Dover recalls Mr. Wright reassured her CH2M would not move to disqualify Hogan Lovells. Dover Decl. ¶ 8. Ms. Dover asked Mr. Wright • what he would do in her shoes, and he said he would do what was in the law firm’s best interest.- Wright Decl. ¶ 4. Ms. Dover interpreted this to mean Hogan Lovells should proceed with the Steadfast litigation, Dover Decl. ¶ 8; Mr. Wright avers he did not intend to give consent, Wright Decl. ¶ 4. After their conversation, Ms. Dover sent Mr. Wright an email to confirm Hogan Lovells would continue to represent both Steadfast and CH2M, and to affirm her belief no further consent was needed. Dover Decl. ¶ 9; id. Ex. B, ECF No. 199-2. She reassured him no Hogan Lovells lawyer who represented CH2M would also work on the Steadfast case. Id. Ex. B. She did not hear from Mr. Wright again, and interpreted his silence as consent. See Dover Sur-Reply Decl. ¶ 7 (“Based on my conversation with Mr. Wright ... and the fact that neither he nor anyone else in the company objected to our relying on the advance waiver, I had a good faith belief that [CH2M] intended to honor the advance waiver.”). Hogan Lovells has not requested, and CH2M and CCI have not provided, any further consent, written or otherwise. Mr. McCoy states that CH2M and CCI have not and will not consent to Hogan Lovells’s representation of Steadfast here. McCoy Decl. ¶ 12.

On August 20 and 21, 2014, Ethan Miller, David Skaar, Benjamin Diggs, and Neil O’Hanlon of Hogan Lovells associated as additional counsel .for Steadfast. Notices of Appearance, ECF Nos. 126-129. Blaise Curet, Jane Baker, Stephen Wong, and William Campagne of Sinnott, Puebla, Campagne & Curet continue to represent Steadfast as co-counsel. Since August, Hogan Lovells has billed Steadfast several thousand hours for the work of ten attorneys, three paralegals, and other support professionals. Miller Decl. ¶¶ 6, 15. Hogan Lovells attorneys have reviewed and produced documents, responded’ to discovery requests, conducted interviews on the East Coast and in Southern California, visited the Mare Island site, negotiated deposition schedules, prepared for depositions, strategized with Steadfast, and prepared and filed the currently pending motions. Id. ¶¶ 7-14.

On December 17, 2014, Mr. Miller contacted Deborah Ballati, CCI’s counsel, to request CCI stipulate to Steadfast’s filing of a first amended counterclaim. Ballati Decl. ¶ 2, ECF No. 183. Ms. Ballati did not agree to the stipulation and explained her understanding that the court’s scheduling order did not allow any further pleadings without a showing of good cause. Id. ¶ 3.. On December 19, 2014, Steadfast filed a motion to amend its counterclaim. Mot. Am. 14, ECF No. 161. The proposed counterclaim included several new claims, including for misrepresentation and accounting irregularities. Proposed Am. Counterclaim ¶¶ 70-110, ECF No. 164-1. *1107 A few weeks later, on January 13, 2015, Mr. McCoy,'CH2M’s general counsel, contacted Ms. Dover about Hogan Lovells’s role in this case. McCoy Decl. ¶ 10. He said that the firm’s representation of Steadfast was a “serious concern,” and worried Hogan Lovells attorneys might seek to depose CH2M’s senior executives. Dover Deck ¶ 14. A day after Mr. McCoy spoke with Ms. Dover, CCI’s counsel contacted Hogan Lovells to confirm it intended to file a motion to disqualify. Ballati Deck ¶ 4. After filing its motion, CCI has refused to allow Hogan Lovells to depose CCI witnesses. Miller Deck ¶ 21. Hogan Lovells has continued to make Steadfast witnesses available for deposition. Id. ¶ 22.

II. DISCUSSION

A. Conflicts of Interest in . General

This District has adopted the Rules of Professional Conduct of the State Bar of California, and any applicable state court decisions, as its own standards of professional conduct. E.D. Cal. L.R. 180(e). The District’s local rules require both familiarity and compliance with California’s Rules. Id. California Rule of Professional Conduct 3-310 provides, in relevant part,

Cal. R. Prof 1 Conduct 3-310(C), (E).

If an attorney or firm takes on a representation in violation of these rules, a client may move for disqualification. See E.D. Cal. L.R. 110 (“Failure of counsel ... to comply with these Rules ... may be grounds for .imposition ... of any and all sanctions authorized by statute or Rule or within the inherent power of the Court.”); Visa U.S.A., Inc. v. First Data Corp., 241 F.Supp.2d 1100, 1103 (N.D.Cal.2003) (“The right to disqualify counsel is within the discretion of the trial court as an exercise of its inherent powers.”) (citing United States v. Wunsch, 84 F.3d 1110, 1114 (9th Cir.1996)). “The district court is permitted to resolve disputed factual issues in deciding a motion for disqualification and must make findings supported by substantial evidence.” Id. (citing Dept. of Corporations v. SpeeDee Oil Change Syst., 20 Cal.4th 1135, 1143 , 86 Cal.Rptr.2d 816 , 980 P.2d 371 (1999)). When faced with ethical disputes, courts may also look to ethics opinions from California and other jurisdictions. Cargill Inc. v. Budine, No. 07-349, 2007 WL 1813762 , at *7 & n. 3 (E.D.Cal. June 22, 2007) (citing Cal. R. Prof 1 Conduct 1-100(A)).

Disqualification is a blunt tool meant to encourage wide berth of ethical grey areas, its ruthlessness warranted only after a clear showing of conflict. On the one hand, “[b]ecause. disqualification is a drastic measure, it is generally disfavored and should only be imposed when absolutely necessary.” Concat LP v. Unilever, PLC, 350 F.Supp.2d 796, 814 (N.D.Cal. *1108 2004). See also Gregori v. Bank of Am., 207 Cal.App.3d 291, 300-01 , 254 Cal.Rptr. 853 (1989) (“Motions to disqualify counsel often pose the very threat to the integrity of the judicial process that they purport to prevent.”); Visa, 241 F.Supp.2d at 1104 (“[S]uch requests ‘should be subjected to particularly strict judicial scrutiny.’ ” (quoting Optyl Eyewear Fashion Int’l Corp. v. Style Cos., 760 F.2d 1045 , 1050 (9th Cir.1985))). On the other hand, particularly when a party alleges a conflict between two of a firm’s current clients, “the paramount concern must be the preservation of public trust both in the scrupulous administration of justice and in the integrity of the bar. Consequently, the recognizably important right to choose one’s counsel must yield to the ethical considerations that embody the moral principles of our judicial process.” State Farm Mut. Auto. Ins. Co. v. Fed. Ins. Co., 72 Cal. App.4th 1422, 1428 , 86 Cal.Rptr.2d 20 (1999). “As a practical matter, an attorney must be able to determine beforehand whether particular conduct is permissible; otherwise, an attorney would be uncertain whether the rules had been violated until ... he or she is disqualified. Unclear rules risk blunting an advocate’s zealous representation of a client.” Snider v. Superior Court, 113 Cal.App.4th 1187, 1197-98 , 7 Cal.Rptr.3d 119 (2003) (quoting Nalian Truck Lines, Inc. v. Nakano Warehouse & Transportation Corp., 6 Cal.App.4th 1256, 1261 , 8 Cal.Rptr.2d 467 (1992)) (alterations in Snider).

The court therefore must “ ‘weigh the combined effect of a party’s right to counsel of choice, an attorney’s interest in representing a client, the financial burden on a client of replacing disqualified counsel and any tactical abuse underlying a disqualification proceeding against the fundamental principle that the fair resolution of disputes within our adversary system requires vigorous representation of parties by independent counsel unencumbered by conflicts of interest.’ ” In re Lee G., 1 Cal.App.4th 17, 26 , 1 Cal.Rptr.2d 375 (1991) (quoting William H. Raley Co. v. Superior Court, 149 Cal.App.3d 1042, 1048 , 197 Cal.Rptr. 232 (1983)). Disqualification is not a punishment for ethical transgressions, but a protection of the integrity of the judicial process. See Cargill, 2007 WL 1813762 , at *7. The decision is one of discretion. See Wunsch, 84 F.3d at 1114 .

1. Successive and Concurrent Conflicts

California law distinguishes two types of conflict. A successive conflict of interest arises when the interests of a current client conflict with those of a former client. See Oaks Mgmt. Corp. v. Superior Court, 145 Cal.App.4th 453, 463 , 51 Cal.Rptr.3d 561 (2006). A concurrent conflict places the interests of two current clients at odds. See id. If the conflict is successive, the “ ‘chief fiduciary value jeopardized is that of client confidentiality.’” Robert Bosch Healthcare Sys., Inc. v. Cardiocom, LLC, No. 14-1575, 2014 WL 2703807 , at *3 (N.D.Cal. June 13, 2014) (quoting Flatt v. Superior Court, 9 Cal.4th 275, 283 , 36 Cal.Rptr.2d 537 , 885 P.2d 950 (1994)) (emphasis in Flatt). If the conflict is concurrent, “ ‘[t]he primary value at stake ... is the attorney’s duty — and the client’s legitimate expectation — of loyalty, rather than confidentiality.’ ” Id. (quoting Flatt, 9 Cal.4th at 284 , 36 Cal.Rptr.2d 537 , 885 P.2d 950 ) (emphasis in Flatt). Nevertheless, the duty of confidentiality and loyalty apply in both concurrent and successive cases. Id. (citing Damron v. Herzog, 67 F.3d 211, 214 (9th Cir.1995) and City & Cty. of S.F. v. Cobra Solns., Inc., 38 Cal.4th 839, 846 , 43 Cal.Rptr.3d 771 , 135 P.3d 20 (2006)).

Different standards govern the analysis of concurrent and successive conflicts. If the conflict is successive, the court determines whether the representa *1109 tions are substantially related. Metro-Goldwyn-Mayer, Inc. v. Tracinda Corp., 36 Cal.App.4th 1882 , 1839, 43 Cal.Rptr.2d 327 (1995). If the representations are substantially related, an attorney’s access to adverse confidential information is presumed and he or she must be disqualified. Kirk v. First Am. Title Ins. Co., 183 Cal.App.4th 776, 796 , 108 Cal.Rptr.3d 620 (2010). Whether two representations are substantially related depends on the factual situation, legal questions, and the attorney’s involvement in the two cases. Morrison Knudsen Corp. v. Hancock, Rothert & Bunshoft, 69 Cal.App.4th 223, 234 , 81 Cal.Rptr.2d 425 (1999). “[T]he court should examine the time spent by the attorney on the earlier cases, the type of work performed, and the attorney’s possible exposure to formulation of policy or strategy.” Id. Information from the first representation must be material to the second. Id. (citing Cal. R. Profl Conduct 3310(E)).

The rule against concurrent conflicts is less forgiving. An attorney will be automatically disqualified from simultaneously representing two clients with, adverse interests without both clients’ informed, written consent, even if the two matters have nothing in common. Flatt, 9 Cal.4th at 284 , 36 Cal.Rptr.2d 537 , 885 P.2d 950 ; see also W. Sugar Coop. v. Archer-Daniels-Midland Co., 98 F.Supp.3d 1074, 1080 , No. 11-3473, 2015 WL 690306, at *4 (C.D.Cal. Feb. 13, 2015) (collecting authority on this point): “It is immaterial whether the lawyer possesses confidential information that could be misused to the prejudice of either client.” Cal. W. Nurseries, Inc. v. Superior Court, 129 Cal. App.4th 1170, 1175 , 29 Cal.Rptr.3d 170 (2005) (citations and internal quotation marks omitted). As the California Supreme Court explains:

Flatt , 9 Cal.4th at' 285, 36 Cal.Rptr.2d 537 , 885 P.2d 950 (emphasis in original). “Ethical walls” or “screens,” which may prevent a conflict of interest from arising in a successive representation, “do nothing to mitigate conflict arising from concurrent adverse client relationships, since the purpose of the prohibition against such relationships is to preserve the attorney’s duty of loyalty, not confidentiality, to his client.” Concat, 350 F.Supp.2d at 822 .

2. Conflicts in this Case; Defenses

Here, Hogan Lovells’s representation of Steadfast, CH2M, and CCI may give rise to both concurrent and successive conflicts of interest. If Hogan Lovells now represents both Steadfast and CCI, its conflict is concurrent, and disqualification is the per se, automatic result. Steadfast argues CH2M, CCI’s corporate parent, is Hogan Lovells’s current client, not CCI, so if a conflict exists, it is successive, not concurrent. Whether or not CCI is a current Hogan Lovells client, Steadfast concedes that CCI is a former client by virtue of the Savannah River matter described above, Opp’n Mot. Disqualify 14, and disqualification may be necessary if that representation was substantially related .to this case.

Steadfast presents two additional defenses. First, it argues the advance waiver in Hogan Lovells’s engagement letter applies to this conflict, whether concurrent or successive, and embodies CH2M’s and *1110 CCI’s consent. Second, it argues that CCI’s delay in bringing the motion shows the motion was tactically motivated and should be denied

B. Corporate Separation

, 1. Professional Rules

The California Rules of Professional Conduct draw a distinction between representation of an organization and its constituents. See Cal. R. Profl Conduct 3-600(A) (“In representing an organization, a member shall conform his or her representation to the concept that the client is the organization itself....”). The California State Bar interpreted this rule in a formal, ethical opinion in 1989. See State Bar of Cal. Standing Comm. On Profl Responsibility and Conduct, Formal Opinion No. 1989-113.' In that opinion the Bar addressed whether it was “ethically permissible for an attorney to undertake a representation adverse to a wholly-owned subsidiary of an existing! corporate client.” It answered in the affirmative, but conditioned the answer on two exceptions. First, “[w]hen a corporation is the alter ego' of another entity or has a sufficient unity of interests, they should be treated as the same entity for conflict purposes.” Id. Second, an attorney may have obtained confidential information from a subsidiary, and the attorney could be precluded from an adverse representation if the confidential information is relevant. Id.

The American Bar Association (ABA) has also .addressed the question. ABA Standing Comm. On Ethics and Profl Responsibility, ¡Formal Ethics Opinion 95-390. It has concluded representation of a corporate parent would not necessarily preclude adverse representation of its subsidiary. Id. But the ABA cautioned “the circumstances of a particular representation may be such that the corporate client has a reasonable expectation that [its] affiliates will be treated as clients, either generally or for purposes of avoidance of conflicts, and the lawyer is aware of the expectation.” Id. Therefore “the better course” is for the lawyer to obtain the parent ■ corporation’s consent. Id. The ABA Committee described several factual circumstances that could give rise to a conflict of interest. A duty of loyalty may arise after a lawyer’s work for a parent that was designed to benefit all its subsidiaries, for example on a stock offering or other financing. Id. If a subsidiary’s in-house counsel reports to the parent’s general counsel, and that general counsel is represented by the lawyer, the corporate parent and subsidiary may expect to be treated together as one client. Id. A lawyer may also obtain confidential information from the parent relevant to a dispute with the subsidiary and thereby represent both. Id. Or a parent and subsidiary could be so. closely connected as to share an identity for purposes of the representation. Id. The ABA quoted Teradyne, Inc. v. Hewlett-Packard Co., a case interpreting California law:

Id. (quoting No. 91-0344, 1991 WL 239940 , at *4 (N.D.Cal. June 6, 1991)). In the ABA’s opinion, the parent’s ownership of the subsidiary would not alone equate the two for conflict purposes, but if they share management and a legal department, they may be one client.

2. Case Law

California courts have weighed in, although only infrequently. The most *1111 prominent case is Morrison Knudsen Corp. v. Hancock, Rothert & Bunshoft, 69 Cal.App.4th 223 , 81 Cal.Rptr.2d 425 (1999). The Morrison Knudsen court described a test for the parent and subsidiary’s “unity of interests” and clarified the law does not require the two entities be alter egos. Id. at 248-52 , 81 Cal,Rptr.2d 425. The Morrison Knudsen test is pragmatic, designed to probe whether “the attorney’s relationship with the corporate family ... may give the attorney a significant practical' advantage in a case against an affiliate.” Id. at 253 , 81 Cal.Rptr.2d 425 . Since Morrison Knudsen was decided, a three-factor inquiry has crystallized. Firsts a firm may represent the subsidiary if it receives confidential information from the parent substantially related to the claim against the subsidiary, a fact which alone may require disqualification. Id. at 245 , 81 Cal.Rptr.2d 425 . This factor is essentially a more specific application of the substantial relationship test, drawn from' cases such as Flatt, supra; see, e.g., Bosch, 2014 WL 2703807 , at *7. Second, the parent and subsidiary may share a unity of interests if the parent controls the subsidiary’s legal affairs or if the parent and subsidiary share a legal department. Morrison Knudsen, 69 Cal. App.4th at 246 , 81 Cal.Rptr.2d 425 ; see also Teradyne,. 1991 WL 239940 , at *5 (“[The parent’s] control and supervision of the legal affairs of [its subsidiary], and specifically its direct rolé in the retention and supervision of the work of [its] outside counsel, represents a significant identity of legal interest between [subsidiary and parent].”). Third, -the parent and subsidiary may have a unity of interests if they share operations and management. Morrison Knudsen, 69 Cal.App.4th at 246-47 , 81 Cal.Rptr.2d 425 . The Morrison Knudsen court held the trial court had not erred by applying California State Bar Opinion 1989-113, ABA Formal Opinion 95-390, and related case law and affirmed the decision to disqualify counsel. 69 Cal.App.4th at 252 , 81 Cal.Rptr.2d 425 (citing Tera-dyne, 1991 WL 239940 , at *4, and Baxter Diagnostics v. AVL Scientific Corp., 798 F.Supp. 612 (C.D.Cal.1992)). The court acknowledged the factually intensive' nature of a motion to disqualify and believed the unity-of-interests test would evolve to “take more definite and useful shape” over time.’ Id.

Although Morrison Knudsen is. the most thorough development of the unity-of-interests test, it was decided in the context .of a successive representation. See 69 Cal.App.4th at 230-31 , 81 Cal. Rptr.2d 425 . 2 In light of this fact, the *1112 Northern District court concluded its application was not dispositive in an alleged concurrent conflict. See Certain Underwriters at Lloyd’s, London v. Argonaut Ins. Co. (Argonaut), 264 F.Supp.2d 914, 922 (N.D.Cal.2003). Because concurrent conflicts of interest pose inherent threats to an attorney’s loyalty first and foremost, disclosure of confidential information and a resulting “practical litigation advantage” are of secondary concern. Id. at 922 . Therefore, if a subsidiary alleges a concurrent conflict, its interest is sufficiently unified with its parent’s if the representation “reasonably diminishes the level of confidence and trust in counsel.” Id. at 922 (internal quotation marks omitted). The Argonaut court went on to describe how the facts of the case before it satisfied this test: “(1) the relatively direct financial relationship between [parent and subsidiary] as a result of the [insurance] pooling agreement and (2) [their] common management, including supervision over the legal affairs of both entities at issue in the two suits in which [the law firm] is involved — mandate the conclusion that the two should be treated as one entity....” Id. at 924 .

The reasoning of Argonaut is persuasive. Mechanical application of the Morrison Knudsen test here, where CCI alleges a concurrent conflict, would unjustifiably import the substantial relationship analysis from the successive representation context. The court’s focus would incorrectly shift from the client’s reasonable expectations of loyalty to the possible strategic advantage gained from exchanges of confidential information. The duties of confidentiality and loyalty assuredly must apply in both concurrent and successive representations; an obvious practical advantage gained by misappropriation of confidential information would surely weigh in favor of disqualification in a concurrent representation. But the lack of practical strategic advantages cannot be dispositive in an alleged concurrent conflict. See id. at 922-24.

The Morrison Knudsen court’s expectation that the unity-of-interests test would “develop on a case-by-case basis,” 69 Cal. App.4th at 253 , 81 Cal.Rptr.2d 425 , .and its citation to William H. Raley Co., 149 Cal.App.3d at 1048 , 197 CaLRptr. 232, support this conclusion. In Raley, the court held that a conflict of interest could arise with a non-client not only when an attorney acquires confidential information, but also when a “relationship with a person or entity creates an expectation that the attorney owes a duty of fidelity.” 149 Cal.App.3d at 1047 , 197 CaLRptr. 232 (citations and internal quotation marks omitted). This logic squares with that of the ABA Committee. See supra Formal Opinion 95-390 (“[T]he circumstances of a particular representation may be such that the corporate client has a reasonable expectation that the affiliates will be treated as clients, either generally or for purposes of avoidance of conflicts, and the lawyer is aware of the expectation.”).

3. Unity of Interests Analyzed

Here, the record discloses that “CCI does not have a separate legal team. [CH2M] controls all of the legal affairs of CCI.” McCoy Reply Decl. ¶ 7, ECF No. 225; see also McCoy Decl. ¶ 9, ECF No. 182 (“I consider Hogan to be strategic counsel to [CH2M] and CCI and I have communicated this clearly to partners at Hogan. In 2014, Hogan attorneys in seven different offices billed over $1 million for work performed for the benefit of CH and its subsidiaries,”); Wright Decl. ¶¶ 2, 9 (the same Hogan Lovells partner has *1113 represented both CH2M and CCI). CH2M’s accounting practices ,and controls are uniform across all its projects. McCoy Reply Decl. ¶ 3. Hogan • Lovells partners have had access to uniform, company-wide accounting data and assisted CH2M in investigations . that required “a deep and thorough understanding of how the company accomplishes percentage of completion accounting in all its projects.” Id. ¶2. Hogan Lovells has provided legal advice to a member of the CH2M board, Mr. Szom-jassy, who is responsible for the Mare Island project. Wright DecL-¶ 10. Hogan Lovells has represented CH2M and CCI in a past adversarial setting similar to this one, in which Hogan Lovells and CCI mediated a fee dispute for remedial work on a former government site. Dover Decl. ¶ 6; Wright Decl. ¶ 9. Hogan Lovells has represented CH2M in matters'involving the entire corporate family’s compliance with the Foreign Corrupt Practices Act (FCPA), and CH2M’s FCPA compliance program does not differ by constituent entity. See generally Brierly Decl., ECF No. 224 (describing Hogan Lovells’s FCPA engagement and CH2M’s compliance program). Hogan Lovells’s representation of CH2M exposes it to the parent corporation’s board of directors and executive officers. CH2M has entrusted Hogan Lovells attorneys with a wide variety of confidences: the board members’ fiduciary duties, the company’s capital market strategies, its balance sheet and financial position, FCPA compliance, its regulatory disclosures, and information about a whistleblower complaint and resulting company internal investigation. McCoy Decl. ¶ 5.

On the other hand, some facts weigh in Steadfast’s favor. Overall, Hogan Lo-vells’s work for CH2M is largely unrelated in purpose to the Steadfast litigation, has generally taken place in Colorado and Washington, D.C., and the firm has ensured no lawyer individually represents both Steadfast and CCI or CH2M. 3 See, e.g., Sur-Reply 6-10. This case does not involve the types of direct parent-subsidiary insurance connections that proved dis-positive in Argonaut, 264 F.Supp.2d at 914 . And although Hogan Lovells has represented Mr. Szomjassy, CH2M’s board member' responsible for the Mare Island project, it appears unlikely he will testify here. See Miller Decl. ¶ 19.

On balance, the facts weigh in favor of the conclusion that CCI and CH2M are a unified client. Hogan Lovells has advised CH2M on strategic decisions in matters that impact the entire corporate family, CH2M and CCI share the same legal department, and the company considers Hogan Lovells to be both its and its subsidiaries’ top strategic firm.

4. Client Identification

Hogan Lovells protests it never agreed to represent CH2M’s subsidiaries. CH2M’s in-house counsel signed a representation agreement on its behalf in 2005. Dover Decl. Ex. A, at 1, ECF No. 199-1 The agreement included the following sentence under the heading “Client Identification”:

Id. Ex. A, at 5. The transmittal letter refers to the client as “CH2M HILL Companies, Ltd.” Id. Ex. A, at 1. This language appears to rely on an ethical opinion of the New York City-Bar Association, which has concluded that a “law firm and client may choose to define their relationship by agreeing to an advance conflict waiver or by delineating in the engagement letter, or other agreement, those affiliates that the law firm is undertaking to represent.” See Ass’n of the Bar of the City of N.Y. on Prof 1 and J. Ethics, Formal Opinion 2007-3.

Despite the parties’ agreement, however, the behavior of Hogan Lovells, CH2M, and CCI since 2005 implies that all three understood Hogan Lovells was more than just CH2M’s law firm. Hogan Lovells’s relationship with CH2M may have started with the parent company alone, but its later representation of CCI and at least one other subsidiary, CH2 Savannah River Company, shows the expansion of their attorney-client relationship. Beginning in or about 2008, Hogan Lovells took on assignments that unquestionably involved the entire CH2M corporate family, including the Savannah River matter, company-wide accounting practices, and company-wide FCPA compliance. Although these other matters may or may not be substantially related to the Mare Island dispute and may or may not give Steadfast a practical advantage here, Hogan Lovells’s decision to tackle them shows its and CH2M’s expectation that Hogan Lovells owed the corporate family a “duty of fidelity.” Ra-ley, 149 Cal.App.3d at 1047 , 197 CaLRptr. 232. At no point as their relationship evolved did Hogan Lovells seek a modificar tion of its original agreement with CH2M. Against this backdrop, Hogan Lovells’s ethical wall does not cure an alleged concurrent conflict. See, e.g., Concat, 350 F.Supp.2d at 821-22 ; Henriksen v. Great Am. Sav. & Loan; 11 Cal.App.4th 109 , 115, 14 CaLRptr .2d 184(1992).

Because the. court concludes CCI and CH2M are both current Hogan Lovells clients, it does not reach the question of Hogan Lovells’s disqualification based on its relationship with CCI as a former client.

C. Waiver

“When evaluating whether a law firm may concurrently represent two clients, even on unrelated matters, it is presumed that the duty of loyalty has been breached and counsel is automatically disqualified.” Visa U.S.A., Inc. v. First Data Corp., 241 F.Supp.2d 1100, 1104 (N.D.Cal.2003). Hogan Lovells’s concurrent representation of CCI and Steadfast is prima facie cause for its disqualification. This presumption may be rebutted by evidence of full disclosure to both clients and their agreement in writing to waive the conflict. Id. Clients may even waive future conflicts. See, e.g., Zador Corp. v. Kwan, 31 Cal. App.4th 1285, 1301 , 37 Cal.Rptr.2d 754 (1995). If such an advanced waiver does not sufficiently inform a client of a later-developing conflict, however, a second waiver may be required. Visa, 241 F.Supp.2d at 1106 .

Here, CH2M’s and Hogan Lovells’s 2005 engagement agreement includes several provisions in a section titled, “Conflicts .and Confidential Information”:

Dover Decl. Ex. A, at 4-5.

California Rule 3 — 310(C) allows waiver of concurrent conflicts of interest by “informed written consent.” The Rule defines “informed written consent” as a client’s “written agreement to the representation following written disclosure.” Cal. R. Profl Conduct 3-310(A). “Disclosure” is defined in turn to mean “informing the client or former client of the relevant circumstances and of the actual and reasonably foreseeable adverse consequences to the client or former client.” Id. In Visa, the Northern District court developed a list of factors that may show whether an advance waiver was sufficiently informed, including the waiver’s specificity, breadth, applicability to all future conflicts, discussions - between the client and attorneys, the relationship between the conflicting representations, the client’s sophistication, and in general, the interests of justice. 241 F.Supp.2d at 1106 ; see also Concat, 350 F.Supp.2d at 820 . In Visa, after applying these factors,' the court concluded that the advance waiver in *1116 question was informed and effective. 5 241 F.Supp.2d at 1107-10 . The court emphasized that the waiver in that case disclosed the adverse client’s identity and as fully as possible without disclosing confidences described the nature of the potential conflict. Id. at 1107 . The court underscored the client’s actual knowledge of the conflict and the client’s size and sophistication, as a Fortune 500 company with over $6 billion in annual revenues. Id. at 1110 . The court distinguished cases in which attorneys downplayed or concealed conflicts. Id. at 1108 (citing Image Technical Servs., Inc. v. Eastman Kodak Co., 820 F.Supp. 1212, 1216 (N.D.Cal.1993) and Fla. Ins. Cty. Assoc. v. Carey Canada, Inc., 749 F.Supp. 255, 257 (S.D.Fla.1990)).

Faced with an advance waiver similar to the waiver here, 6 the court in Concat reached the opposite conclusion. 350 F.Supp.2d at 820-21 . It found the waiver in question nonspecific and overbroad both in its scope and subject matter and noted the record lacked evidence of the law firm’s discussion of the waiver with its client. Id. at 820 . Considering the fact that the law firm did not seek to represent an adverse client in a substantially related matter and that the client was a sophisticated user of legal services, the court nonetheless concluded the waiver was not fully informed. Id. The court also expressed its. disapproval of the law firm’s decision not to immediately inform, , its clients when it became aware of its concurrent obligations. Id. at 821 . The court distinguished Fisa by noting the law firm in that case had disclosed the nature of the *1117 conflict and specified which parties may become adverse. Id.

Recently, the Central District has rejected an open-ended waiver, also similar to the one in this case. 7 See Western Sugar, 98 F.Supp.3d at 1082 , 2015 WL 690306, at *5 . It applied the factors listed in Visa and Concat and concluded the waiver was too open-ended, non-specific, and lacked, identification of potentially adverse clients, the types of conflicts, or the types of possible future representations. Id. It distinguished the Visa waiver, which identified a specific adverse client, “disclosed as fully as possible the nature of any potential conflict that could arise between the parties,” and “specifically contemplated the firm’s representation of Visa against First Data in litigation matters.” Id. (also citing Zador, 31 Cal.App.4th at 1302 , 37 Cal.Rptr.2d 754 , for the proposition that a waiver may be enforceable if it names the prospective adverse client). The court in Western Sugar quoted a declaration submitted by the client’s general counsel, who stated his attorneys had not discussed the prospective waiver and explained his understanding that a further disclosure and request for a waiver was necessary. Id.

The Western Sugar court rejected citations to the ABA Model Rules and the argument that decisions emphasizing client sophistication were analogous. Id. The Western Sugar court appears to have referred to a 2005 formal ethics opinion in which the ABA determined that a prospective or advance waiver is effective if “the client reasonably understands the material risks that the waiver entails.” See Am. Bar Ass’n Standing Comm. On Ethics and Profl Responsibility, Formal Ethics Opinion 05-436 (2005). Therefore, in the ABA’s opinion, a waiver-will more likely be effective-if it comprehensively explains the types of conflicts that might arise and any adverse consequences of giving consent. Id. Generally, in the ABA’s opinion, an open-ended general consent is ineffective, but is more likely to be effective if (1) the client is an experienced user of legal services; (2) is independently represented by other counsel; (3) is reasonably informed of the risk of a conflict; and (4) consent is limited only to unrelated future conflicts. Id. Comment 22 to Rule 1.7 of the ABA Model Rules of Professional Conduct provides similarly. The Northern District of Texas recently applied ABA Formal Opinion 05-436 and Model Rule 1.7 to conclude that an advance waiver similar to the waiver here and in Concat was informed and effective. 8 Galderma Labs., L.P. v. Actavis Mid Atl. LLC, 927 F.Supp.2d 390 , 402 *1118 ' (N.D.Tex.2013). It cited Visa and Concat, •but disagreed with their reasoning, concluding the national standard had evolved to embrace a broader conception of “informed consent.” Id. at 404 .

This court declines to adopt the broader interpretation given informed consent by the court in Galderma Labs. California courts may look outside the state for guidance on ethical questions, but out-of-state authority is persuasive only absent “a conflicting state public policy.” City and Cnty. of S.F., 38 Cal.4th at 852 , 43 Cal. Rptr.3d 771 , 135 P.3d 20 . California has adopted neither ABA Model Rule 1.7 nor its comments. Its policy, as correctly distilled by the Visa and Concat courts, encompasses a broader range of concerns that goes beyond the client’s sophistication or the absence of a direct and substantially related conflict. See W. Sugar, 98 F.Supp.3d at 1083 , 2015 WL 690306, at *6 (reaching the same conclusion).

Turning to the matter at hand, several factors weigh against enforcement of the prospective waiver. It is broad, general, and indefinite. It leaves Hogan Lovells “free to represent any other client either generally or in any matter in which [CH2M] may have an interest.” Dover Deck. Ex. A, at 4. Its scope is essentially unlimited, making its provisions applicable to everything from “mergers and acquisitions” to “patents, copyrights, trademarks, trade secrets or other intellectual property,” “administrative proceedings,” “advocacy with respect to legislative issues,” and litigation. Id. Given the broad language of the waiver, Hogan Lovells did not pursue an exemplary approach. As Hogan Lo-vells’s relationship with CH2M expanded, rather than avoiding a misunderstanding as, to prospective conflicts by revisiting the waiver, the firm waited until a potential conflict arose, then asserted affirmatively in a phone call and e-mail to Mr. Wright that the engagement letter tied CH2M’s hands. The court declines to accept Steadfast’s argument at hearing, that CCI bore the burden of showing it had withheld eonsént.

Some factors do weigh in favor of the waiver’s effectiveness. The waiver does not apply to a matter “which is substantially related to a matter in which [Hogan Lovells] represents] [CH2M] and in which the other client is adverse to you.” Id. Moreover, CH2M is a large corporation with international operations and was represented by its own in-house counsel at the time it entered the agreement. In total, however, these countervailing concerns do not render the waiver effective. It is simply too broad and too stale to cover the current conflict.

Steadfast contends that rejection of its position would render the waiver agreement meaningless, upset a standard national practice, and leave hanging over it a sword of Damocles, “ready to drop at any moment” at its client’s whim. See Opp’n Mot. Disqualify 15-16, 18, EOF No. 196. Broad advance waivers are a logical outgrowth of large law firms and the spiderwebs of affiliates,- subsidiaries, and parents they represent. The court recognizes that without effective waivers, “[l]arge firms would never be able to take on small, specialized matters for a client unless the firms could reasonably protect against ... abuse.” Galderma, 927 F.Supp.2d at 395 . But the waiver in Visa serves as a model on which firms can rely. See supra note 5 and accompanying text. Pronouncing the waiver here enforceable and blessing Hogan Lovells’s conduct would promote broad, static agreements over timely and forthright discussions of conflicts and their effects, a result contrary to California ethical rules and policy.

*1119 This case is an example of a situation in which “the original waiver insufficiently disclosed the nature of a subsequent conflict.” Concat, 350 F.Supp.2d at 820 . At the time GH2M and Hogan Lovells began their relationship, they agreed to limit the engagement to the parent corporation. This choice is unsurprising in light of the subject of that first representation, an acquisition; however, as Hogan Lovells took on increasingly diverse assignments, its role and relationship with CH2M changed. It represented CH2M in corporate governance matters. It assisted with internal investigations of the firm’s accounting practices. It advised the company in matters of the Foreign Corrupt Practices Act. It directly represented CH2M’s subsidiaries in the Savannah River fee dispute without updating its engagement letter, despite its original intent not to represent a subsidiary absent express written agreement. See Dover Decl. Ex. A, at 5. Although CH2M did not bring up the engagement letter or the waiver at the time, it was' not obliged to. When Steadfast sought Hogan Lovells’s expertise in this case, the firm asserted CH2M had no choice but to accept Hogan Lovells’s taking on the Steadfast matter. The price of hiring a large and capable firm should not be powerlessness in the face of unanticipated future adverse representations, especially when, as here, the attorney-client relationship is dynamic over time. Were the court to uphold Hogan Lovells’s position, it is its clients that would be threatened by the Damoclean sword.

The decision to disqualify is a matter of discretion. The court recognizes it is a drastic solution subject to the nuances of fact and circumstance in a given case. But the totality of circumstances here require Hogan Lovells’s disqualification. Hogan Lovells realized it faced a conflict but determined it would take on representation of Steadfast, then told CH2M of its decision asserting it was covered by the broad advance waiver from nine years ago; it then inferred CH2M’s acceptance from its silence. In this way, Hogan Lovells effectively forced CH2M’s general counsel into “an impossible position of having to brief the directors on litigation [Hogan Lovells] intended to prosecute against [CH2M] in meetings where I would need [Hogan Lo-vells] to advise the board on strategic matters.” McCoy Reply Decl. ¶ 11, ECF No. 225. He concluded Hogan Lovells “could not represent [CH2M] in its most serious matters involving the executive team and its Board of Directors, while attacking the integrity of the company in another matter representing a client adverse to the company.” Id. CH2M cannot have fairly anticipated this turn of events at the time it signed the original engagement letter. See Raley, 149 Cal.App.3d at 1049 , 197 CaLRptr. 232, (“[A client] should not be asked to confront [its law firm] in both the courtroom and the board room.”).

D. Delay and Prejudice

The court is mindful that in the context of a successive representation,, a client who wishes to disqualify opposing counsel may , not wait for just the right moment. See, e.g., Openwave Sys. Inc. v. Myriad France S.A.S., No. 10-02805, 2011 WL 1225978 , at *6-7 (N.D.Cal. Mar. 31, 2011). If a party opposing a motion to disqualify can produce prima facie evidence of unreasonable delay and prejudice, the burden shifts to the party seeking disqualification to justify its delay. In re Complex Asbestos Litig., 232 Cal.App.3d 572, 599 , 283 Cal.Rptr. 732 (1991). '“[T]he ensuing prejudice must be extreme.” W. Cont’l Operating Co. v. Natural Gas Corp., 212 Cal.App.3d 752, 764 , 261 Cal.Rptr. 100 (1989). The exception is indeed narrow; a California Court of Appeal has upheld an order disqualifying counsel brought on the “eve of a trial” because the opposing party *1120 did not show prejudice. See In re Complex Asbestos Litig., 232 Cal.App.3d at 599 , 283 Cal.Rptr. 732 (“The only prejudice cited ... is that [the] clients lost the services of knowledgeable counsel of their choice, and were forced to retain new counsel. This is not the type of prejudice contemplated by our decision in [Western Continental Operating Co.]. Rather, the [disqualified] firm has simply identified those client interests implicated by any disqualification motion”).

As noted, Openwave involved a case of successive representation. It appears that only one court, and no California state court, has adopted this delay and prejudice test in the context of a concurrent representation. See Bosch, 2014 WL 2703807 , at *4 & n. 2. That court also recognized California authority contrary to its position. See id. The parties are not aware of any state court decision applying the test to an alleged concurrent representation. California case law suggests delay and prejudice may even be irrelevant in cases of concurrent conflicts. See State Farm Mut. Auto. Ins. Co. v. Federal Ins. Co., 72 Cal.App.4th 1422, 1433 , 86 Cal.Rptr.2d 20 (1999) (“In successive representation situations, there exists a narrow exception to the rules requiring disqualification based on delay.”). The exception for delay and prejudice derives from the doctrine of implied waiver of conflicts, a doctrine that does not apply to concurrent representations. See id. But because motions to disqualify are often tactically motivated and should be viewed with skepticism, this court finds it is reasonable to take delay and suspicious timing into consideration, stopping short of applying the test disposi-tively. See TransPerfect Global, Inc. v. MotionPoint Corp., 2012 WL 2343908 , at *11, 2012 U.S. Dist. LEXIS 85649 , at *38 (N.D. Cal. June 20, 2012).

Here, Hogan Lovells attorneys associated as additional counsel for Steadfast on August 20 and 21, 2014, and CCI filed its motion on January 16, 2015, a delay of about five months. CCI contends its motion was not delayed because it was filed only weeks after it learned Steadfast intended to file an amended counterclaim. In CCI’s view, the counterclaim so seriously altered the litigation that Hogan Lo-vells’s presence became intolerably adversarial, Steadfast argues this reasoning is a smokescreen, because CCI has long asserted claims of bad faith and misconduct. While a delay of four months has been found long enough to deny a motion for disqualification in other federal decisions, see, e.g., Openwave, 2011 WL 1225978 , at *7, California courts require that delay and prejudice be “extreme” and reach beyond “those client interests implicated by any disqualification motion,” In re Complex Asbestos Litig., 232 Cal.App.3d at 599 , 283 Cal.Rptr. 732 .

Steadfast argues CCI’s motion is meant to delay and specifically to stifle an amendment to Steadfast’s counterclaim. See, e.g., Sur-reply 3-6. The timing of CCI’s motion is more plausibly viewed as CCI’s reaction to the motion to amend, the proverbial last straw. Two considerations weigh in CCI’s favor. First, Mr. McCoy, CH2M’s general counsel, joined the company in September 2014, McCoy Deck ¶ 2, and can reasonably have been expected to have been coming up to speed with the company’s legal affairs over several months. Second, CCI’s arguments do not depend on the denial of Steadfast’s motion to amend. CCI’s briefing argues that, from its perspective, Steadfast went on the offensive by seeking to amend its counterclaim, and this has made Hogan Lovells’s continuing representation intolerable. Rather than trying to pull the rug from under Steadfast’s feet, CCI can be seen as jumping to clear a rug it believes Steadfast has yanked from under its feet. Even were CCI’s motion a tactical move, it has *1121 proved to be poor tactics: Steadfast has now completely briefed all the pending motions and the court is prepared to decide them in due course.

Neither will Steadfast suffer any prejudice beyond that normally associated with a motion to disqualify. The question here is not whether CCI impliedly waived the conflict by responding to discovery requests in late 2014. Cf. e.g., Trust Corp. of Mont. v. Piper Aircraft Corp., 701 F.2d 85 , 87 (9th Cir.1983) (applying federal law to conclude “[i]t is well settled that a former client who is entitled to object to an attorney representing an opposing party on the ground of conflict of interest but who knowingly refrains from asserting it promptly is deemed to have waived that right.” (emphasis added)). It is whether CCI’s delay and any resulting prejudice are so extreme as to justify toleration of a concurrent conflict of interest. A period of five months and the associated time and money spent on discovery do not make for extreme prejudice and delay. The court is able to adjust discovery deadlines to mitigate any prejudice to Steadfast’s discovery efforts, and Steadfast will have the benefit of continuous representation of the Sinnott Puebla firm to assist with transition to new counsel.

III. CONCLUSION

CCI’s motion to disqualify Hogan Lo-vells is GRANTED. This resolves ECF No. 180. All pending dates and deadlines are VACATED. A status conference is SET for April 30, 2015, at 2:30 p.m. in Courtroom 3. The parties shall file a joint status report proposing a new schedule for the balance of the case no later than seven days before the status conference.

IT IS SO ORDERED.

. Lennar’s first motion for summary judgment and Steadfast's motion to amend were originally noticed for hearings in January 2015, but were reset on the court's motion to coincide with the other three. See Minute Orders, ECF Nos. 165, 185. *1112 from the parent which could be used against the subsidiary.”). Here, unlike in Morrison Knudsen , Hogan Lovells currently represents both CH2M and Steadfast.

. At hearing, Steadfast’s counsel argued Morrison Knudsen was decided in the context of a concurrent representation. That court’s order, however, speaks for itself:

69 Cal.App.4th at 230-31 , 81 Cal.Rptr.2d 425 (emphasis in original). The Northern District court adopted this same interpretation of Morrison Knudsen in Certain Underwriters at Lloyd’s, London v. Argonaut Insurance Co., 264 F.Supp.2d 914, 922 (N.D.Cal.2003) (‘‘[T]he ‘unity of interest’ analysis in Morrison Knudsen was undertaken in the context of the conflict of interest claim based on the successive representation model — the focus was on the acquisition of confidential information

. CCI has submitted evidence that some Hogan Lovells lawyers associated as counsel in this case have been included in CH2M’s internal system for tracking its attorneys’ billing. See Wright Reply Decl. ¶ 9, ECF No. 223. In its sur-reply and the declarations attached, Hogan Lovells explains that this internal system lists any lawyer who has ever worked for CH2M in any capacity, and even includes lawyers who are no longer associated with Hogan Lovells or are deceased. See Sur-Reply 9-10; Scott Decl. ¶¶ 4-5, ECF No. 251-1. The firm vows it has erected an effective "ethical wall” between any of its attorneys representing Steadfast and the others representing CH2M, and the court sees no reason to discount these assertions. See Sur-Reply 9; Dover Sur-Reply Decl. ¶ 3, ECF No. 251-3; Miller Sur-Reply Decl. ¶¶4-5, ECF No. 251-4.

. Unlike the waiver here, in Visa the firm had disclosed the nature of a potential conflict and the likely persons involved:

Visa, 241 F.Supp.2d at 1107 (emphases'and alterations in original).

. In Concat, the waiver provided,

350 F.Supp.2d at 801-02 .

. In Western Sugar , the waiver agreement provided as follows:

98 F.Supp.3d at 1083 , 2015 WL 690306, at *5 .

. The waiver in Galderma Labs provided, in pertinent part,