OPINION AND ORDER
A decade ago, I issued a series of opinions regarding the scope of a litigant’s duty to preserve electronic documents and the consequences of a failure to preserve such documents falling within the scope of that duty.1 At its simplest, that duty requires a party anticipating litigation to refrain from deleting electronically stored information (“ESI”) that may be relevant to that litigation. Such obligation should, at this point, be quite clear — especially to the party planning to sue. Here, I consider the appropriate penalty for a party that — with full knowledge of the likelihood of litigation — intentionally and permanently destroyed the email files of several key players in this action.2 I also consider how to determine an appropriate remedy for the injured party when it remains unclear whether the destroyed evidence would, in fact, be favorable to that party.
1. INTRODUCTION
Sekisui America Corporation (“Sekisui”) and Sekisui Medical Co., Ltd. bring this *498action for breach of contract3 against Richard Hart (“Hart”) and Marie Louise Trudel-Hart (collectively, “the Harts”) in relation to Sekisui’s acquisition of America Diagnostica, Inc. (“ADI”), a medical diagnostic products manufacturer of which Hart was president.4 During discovery, Sekisui revealed that ESI in the form of email files belonging to certain ADI employees — including Hart — had been deleted or were otherwise missing.5 In March 2013, it became clear that Sekisui did not institute a litigation hold until more than fifteen months after sending a Notice of Claim to the Harts. In. the meantime, Sekisui permanently deleted the ESI of Hart and former ADI employee Leigh Ayres.6 In light of these developments, the Harts requested that this Court impose sanctions on Sekisui for the spoliation of evidence.7 Specifically, the Harts requested: (1) an adverse inference jury instruction based on the destruction of Hart’s and Ayres’ ESI;8 and (2) sanctions for spoliation based on the alleged or actual loss of the email folders of several other ADI employees.9
I referred this dispute to Magistrate Judge Maas.10 After extensive letter briefing and oral argument, the Magistrate Judge issued a written decision on June 10, 2013, in which he declined to issue any sanctions, finding that the Harts failed to show any prejudice resulting from the destruction of the ESI.11 The Harts filed objections to the portions of the Memorandum Decision declining to impose sanctions for the destruction of ESI.12 For the reasons set forth below, the Memorandum Decision of the Magistrate Judge is reversed to the extent it denied the Harts’ request for a sanction based on Sekisui’s destruction of ESI.
11. BACKGROUND
A. The Present Action13
Sekisui expressed interest in acquiring ADI from the Harts in late 2008. Shortly *499before the closing in 2009, Hart — acting as chief executive officer — apparently instructed ADI employees to delete all emails that no longer required action.14 The stock purchase agreement (“SPA”) governing the sale of ADI to Sekisui contained a number of representations and warranties (“Representations”), including: (1) that ADI complied with all relevant federal regulations; (2) that its facilities were sufficient to conduct its business activities; and (3) that ADI’s products contained no material defects. Not satisfied that ADI was complying with the Representations, Sekisui fired Hart and sent the Harts a Notice of Claim on October 14, 2010, evidencing Sekisui’s intent to file a lawsuit. Sekisui then filed its Complaint on May 2, 2012, alleging that the Harts breached the contract of sale by violating the Representations in the SPA.15
B. The Destruction of Hart’s ESI
On February 8, 2013, counsel for Sekisui revealed to the Harts that Hart’s email files were deleted in March 2011, five months after the Harts received the Notice of Claim.16 In response to questioning by the Harts, Sekisui revealed that a litigation hold was put into place in January 2012, about fifteen months after the Notice of Claim was sent to the Harts.17 Sekisui did not notify Northeast Computer Services (“NCS”) — the vendor in charge of managing Sekisui’s information technology systems — of the duty to preserve until July 2012, three months after the Complaint was filed.18 In the interim, Hart’s email folder was permanently deleted by NCS at the directive of former ADI employee Dicey Taylor, who was ADI’s head of Human Resources.19 Sekisui initially *500represented that no other ESI was missing besides Hart’s and that of a few other former ADI employees, none of whom were considered relevant custodians.20
Further investigation by the Harts revealed that days before filing the Complaint, the NCS employee who deleted Hart’s ESI emailed another NCS employee regarding Taylor’s directive. According to the email:
Several months ago, maybe in the summer, [Taylor] told me to delete [Hart’s] mailbox. I followed this by “are you sure? are you sure? are you sure?” She was very certain that she wanted it deleted, apparently she thought that there wasn’t any more useful information or whatever they needed they captured. I would have personally archived it.... This is not 100% certain, but I thought I heard that [Hart’s] email had been combed through by the Sekisui lawyers before [Taylor] told me to delete it.21
In June 2012, Doug LeMasurier — the NCS employee in charge of the ADI account— confirmed that Hart’s email was permanently deleted and irretrievable.22 LeMasurier stated: “[T]here is no backup of this file. We recommended that it not be deleted, but we were instructed by [an ADI] employee to delete the file.”23
By way of explanation, Sekisui maintains that the destruction of Hart’s ESI was “largely due to the actions of a single former employee acting without direction from Sekisui,” i.e., Taylor.24 Sekisui further asserts that Taylor made the unilateral decision to delete Hart’s email in order to free up space on the ADI server after determining that Hart was no longer receiving work-related email.25 Before directing NCS to permanently delete Hart’s ESI, Taylor apparently “identified and printed any emails that she deemed pertinent to the company,” which emails have been produced to the Harts.26 Even those emails deemed “pertinent to the company” do not appear to have been backed up before being deleted by NCS; they were merely printed by Taylor in hard copy.27 Sekisui searched several alternative sources and eventually produced about 36,-000 emails to and from Hart.28 Sekisui also maintains that, according to current and former ADI employees, Hart “used email sparingly,” often used his personal email account, and took a work computer from ADI on which he retained copies of his work email, and which he never returned.29 It is impossible to say how many emails were permanently deleted and remain unrecoverable. Because of a cognitive disor*501der, Hart cannot testify or be deposed in this action.30
C. The Destruction of Ayres’ ESI
Sekisui initially denied the Harts’ assertion that Ayres’ emails had also been deleted, assuring that “Sekisui has maintained the email folders for [custodians including Ayres] and there is no basis to accuse Sekisui of the improper deletion” of Ayres’ ESI.31 However, the Harts uncovered evidence establishing that, in fact, Taylor instructed NCS to delete Ayres’ email files in October 2011.32 Ayres was the ADI employee responsible for ensuring compliance with FDA regulations, and the deletion of her ESI was carried out with the apparent approval of ADI’s then-President and chief operating officer, Kevin Morrissey.33 Taylor directed LeMasurier to “delete Leigh Ayres from the ... server — totally into cyberspace. Do not archive. Kevin [Morrissey] has approved this removal.”34 Taylor’s request apparently responded to another ADI employee’s suggestion that Ayres’ email address be deleted since Ayres was no longer an employee and had only been receiving junk mail.35 Instead, more than a year after the duty to preserve arose, Taylor ordered the permanent destruction of Ayres’ ESI with apparent permission from (and at least awareness of) of ADI’s then-President.
Sekisui maintains that the deletion of Ayres’ email files was done “for the sole purpose of removing emails that were unnecessary for the continued operation of ADI’s business.”36 Sekisui was able to produce nearly 7,000 emails and attachments “from Ms. Ayres’s archived email files, plus several thousand more Ayres emails from other custodians’ files.”37 There is, again, no way to determine how much ESI was deleted permanently and remains unrecoverable. Sekisui also emphasizes that it has maintained and produced thousands of relevant documents— including non-email electronic files — of both Hart and Ayres.38 Accordingly, Sekisui argues that the missing emails would be of only marginal relevance in this action.39
D. The Decision of the Magistrate Judge
The Magistrate Judge concluded that the destruction of Hart’s ESI “may well rise to the level of gross negligence” and that the emails destroyed may well have been relevant to the breach of contract claim, but that no sanctions should be imposed as a result of such destruction because the Harts failed to produce or describe any relevant email that Sekisui failed to produce, i.e., the Harts made no *502showing of prejudice.40 As to Ayres’ ESI, the Magistrate Judge called Taylor’s directive “at first blush, extremely troublesome,” but made no determination of Sekisui’s culpability in the destruction of that ESI.41 Rather, the Magistrate Judge declined to impose sanctions based on the Hart Defendants’ failure to show that they have been prejudiced by the destruction of Ayres’ ESI.42 The Magistrate Judge declined to presume either relevance or prejudice despite his finding that Sekisui “may” have acted in a grossly negligent manner.43
III. LEGAL STANDARD
A district court must “modify or set aside any part of [a magistrate judge’s] order that is clearly erroneous or is contrary to law.”44 “A magistrate judge’s findings may be considered clearly erroneous where on the entire evidence, the [district court] is left with the definite and firm conviction that a mistake has been committed.”45 If the fnagistrate judge’s order “ ‘fails to apply or misapplies relevant statutes, ease law, or rules of procedure,’ ” such an order is “contrary to law.”46
IV. APPLICABLE LAW
The controlling case in this Circuit regarding adverse inference instructions is Residential Funding Corp. v. DeGeorge Financial Corp.47 The court there held:
[A] party seeking an adverse inference instruction based on the destruction of evidence must establish (1) that the party having control over the evidence had an obligation to preserve it at the time it was destroyed; (2) that the records were destroyed with a culpable state of mind; and (3) that the destroyed evidence was relevant to the party’s claim or defense such that a reasonable trier of fact could find that it would support that claim or defense.48
Rule 37 “authorizes a wide range of sanc*503tions for discovery abuses.”49 If the district court determines that a party wrongfully withheld or destroyed evidence, it may tell the jury “those facts and nothing more; or it might [add] that the jury could, but need not, draw inferences against [the spoliators] based on those facts; or ... that the jury should draw adverse inferences against [the spoliators] based on those facts; or that the jury should render a verdict for the [innocent party].”50
A. Establishing a Culpable State of Mind
“The culpable state of mind factor is satisfied by a showing that the evidence was destroyed knowingly, even if without intent to [breach a duty to preserve it], or negligently.”51 “The sanction of an adverse inference may be appropriate in some cases involving the negligent destruction of evidence because each party should bear the risk of its own negligence.” 52 This is because
[t]he adverse inference provides the necessary mechanism for restoring the evidentiary balance. The inference is adverse to the destroyer not because of any finding of moral culpability, but because the risk that the evidence would have been detrimental rather than favorable should fall on the party responsible for its loss.53
It follows that gross negligence also satisfies the culpability requirement.54 This circuit follows a “case-by-case approach to the failure to produce relevant evidence” because “such failures occur along a con*504tinuum of fault — ranging from innocence through the degrees of negligence to intentionality.”55.
B. Establishing Relevance
“ ‘[R]elevant’ in [the context of an adverse inference instruction] means ... [that] the party seeking an adverse inference must adduce sufficient evidence from which a reasonable trier of fact could infer that ‘the destroyed [or unavailable] evidence would have been of the nature alleged by the party affected by its destruction,’ ” ie., that the destroyed evidence would have been helpful to the movant.56 Yet “[c]ourts must take care not to hold the prejudiced party to too strict a standard of proof regarding the likely contents of the destroyed or unavailable evidence, because doing so would subvert the purposes of the adverse inference, and would allow parties who have destroyed evidence to profit from that destruction.”57
When evidence is destroyed willfully, the destruction alone “is sufficient circumstantial evidence from which a reasonable fact finder could conclude that the missing evidence was unfavorable to that party.”58 “[T]he intentional destruction of relevant records, either paper or electronic, after the duty to preserve has attached, is willful.”59 “Similarly, a showing of gross negligence in the destruction ... of evidence will in some circumstances suffice, standing alone, to support a finding that the evidence was unfavorable to the grossly negligent party.”60 Accordingly:
where a party seeking an adverse inference adduces evidence that its opponent destroyed potential evidence ... in bad faith or through gross negligence (satisfying the “culpable state of mind” factor), that same evidence ... will frequently also be sufficient to permit a jury to conclude that the missing evidence is favorable to the party (satisfying the “relevance” factor).61
C. Prejudice
When evidence is destroyed willfully or through gross negligence, prej*505udice to the innocent party may be presumed because that party is “deprived of what [the court] can assume would have been evidence relevant to [the innocent party’s claims or defenses].”62 That is, prejudice is presumed precisely because relevant evidence, i.e., evidence presumed to be unfavorable to the spoliating party,63 has been intentionally destroyed and is no longer available to the innocent party. When, however, the destruction of evidence is merely negligent, the burden falls on the innocent party to prove prejudice.64 This circuit has “repeatedly held that a case-by-ease approach to the failure to produce relevant evidence, at the discretion of the district court, is appropriate.”65 The failure to adopt good preservation practices is “one factor in the determination of whether discovery sanctions should issue.”66
V. DISCUSSION
A. Culpable State of Mind 1. The Destruction of Hart’s ESI
The Magistrate Judge concluded that the destruction of Hart’s ESI “may well rise to the level of gross negligence,” but apparently decided that such destruction was not willful because “there has been no showing that Taylor directed [the emails’] erasure for any malevolent purpose.”67 Because Hart’s ESI was destroyed at the direct request of an ADI *506employee after the duty to preserve had attached and the law does not require a finding of malevolence to constitute willfulness in the context of spoliation, I find this conclusion contrary to law and clearly erroneous.
Hart’s ESI was willfully destroyed. It is undisputed that Taylor directed an NCS employee to permanently delete Hart’s ESI.68 Indeed, Taylor was apparently “very certain” that the ESI should be deleted and, notably, demanded the destruction despite the fact that the NCS employee recommended against such action.69 Moreover, no back-up tapes were made of the data deleted,70 and even the emails that Taylor did print are of significantly less evidentiary value given that their metadata is no longer available.71 The law does not require a showing of malice to establish intentionality with respect to the spoliation of evidence. In the context of an adverse inference analysis, there is no analytical distinction between destroying evidence in bad faith, ie., with a malevolent purpose, and destroying it willfully.72 That Sekisui provides a good faith explanation for the destruction of Hart’s ESI— suggesting that Taylor’s directive was given in order to save space on the server— does not change the fact that the ESI was willfully destroyed.
*5072. The Destruction of Ayres’ ESI
The Magistrate Judge declined to issue sanctions for the destruction of Ayres’ ESI based on his conclusion that the Harts have not been prejudiced by such destruction.73 Because the Magistrate Judge failed to perform any analysis of Sekisui’s culpability in destroying Ayres’ ESI, his findings are contrary to law and clearly erroneous.
The adverse inference analysis required by Residential Funding necessitates a finding of culpability with respect to the destruction of the missing evidence.74 Without explicitly saying so, the Magistrate Judge implies that the destruction of Ayres’ ESI was not willful since Taylor’s directive “appears to have been sent in response to a request to delete Ayres’ email address ... because it ... was cluttering ADI’s server.”75 To the extent that the Magistrate Judge did make a finding of culpability with respect to the destruction of Ayres’ ESI, such finding was clearly erroneous. As discussed earlier, even a good faith explanation for the willful destruction of ESI when the duty to preserve has attached does not alter the finding of willfulness. Here, the deletion of Ayres’ ESI was intentional: not only was potentially relevant ESI destroyed at the behest of an ADI employee after the duty to preserve had attached but such direction was given with at least the knowledge of ADI’s then-President, Kevin Morrissey, if not his outright approval.76
3. Sekisui’s Failure to Ensure Preservation of Relevant Documents
Because the Magistrate Judge found that Sekisui’s failure to implement appropriate document retention practices “may well rise to the level of gross negligence,” I now clarify that such failure constitutes gross negligence in these circumstances. While the failure to timely institute a litigation hold does not constitute gross negligence per se,77 the facts here are egregious and establish that Sekisui was grossly negligent. First, no litigation hold was issued by Sekisui until fifteen months after the Notice of Claim was sent to the Harts.78 Such failure is inexcusable given that Sekisui is the plaintiff in this action and, as such, had full knowledge of the possibility of future litigation. Second, once a litigation hold was issued, it took Sekisui another six months to notify its IT vendor — ie., the company responsible for actually preserving the relevant documents — of that duty to preserve.79 And, in the meantime, the ESI of at least two significant former ADI employees was destroyed at ADI’s direction.80 As such, I find that (1) Seki*508sui’s destruction of the Hart and Ayres ESI was intentional, and (2) its further failure to meet even the most basic document preservation obligations constitutes gross negligence.
B. Relevance
There is no question that Hart’s and Ayres’ ESI is relevant. The Magistrate Judge concluded as much, acknowledging that any incoming and outgoing emails regarding the adequacy of ADI’s facilities throughout the relevant time period would be relevant to Sekisui’s breach of contract claim, and noting that “it is not difficult to envision numerous respects in which Hart’s incoming and outgoing emails might be relevant.”81 Moreover, Ayres’ ESI would be relevant because “Ayres previously had been the ADI employee responsible for ensuring ADI’s compliance with FDA regulations.”82 Indeed, there can be no doubt that Hart’s and Ayres’ ESI is relevant based solely on whose data was destroyed. First, Hart is not only a defendant in this action, but also is unable to testify on his own behalf due to a cognitive disorder.83 Second, Ayres’ position at ADI is directly related to the claim in this action: Sekisui makes a claim for breach of contract, in part, on the basis that the Harts breached the Representation relating to FDA compliance,84 and Ayres was the ADI employee responsible for such compliance.85 Sekisui appears to concede the relevance of Hart’s and Ayres’ ESI in any event.86 Indeed, the real argument here has always been whether the destruction of that ESI prejudices the Harts.87
C. Prejudice
The Magistrate Judge found that sanctions should not be imposed — despite the fact that the missing ESI could be relevant to the Harts’ defense — because the Harts failed to show that “relevant information potentially helpful to them is missing.”88 Because the destruction of evidence was intentional, I find that the imposition of such a burden on the innocent party is contrary to law.
When evidence is destroyed intentionally, such destruction is sufficient evidence from which to conclude that the missing evidence was unfavorable to that party.89 As such, once wilfulness is established, no burden is imposed on the innocent party to point to now-destroyed evidence which is no longer available because the other party destroyed it. Rather, the “risk that the evidence would have been detrimental rather than favorable [to the spoliator] should fall on the party responsible for its *509loss.”90 To shift the burden to the innocent party to describe or produce what has been lost as a result of the opposing party’s willful or grossly negligent conduct is inappropriate because it incentivizes bad behavior on the part of would-be spoliators. That is, it “would allow parties who have destroyed evidence to profit from that destruction.”91 Prejudice is presumed for the purposes of determining whether to give an adverse inference instruction when, as here, evidence is willfully destroyed by the spoliating party.92
As a result of the destruction of Hart’s and Ayres’ ESI, the Harts are left without an untold amount of contemporaneous evidence of ADI’s operations prior to purchase by Sekisui. Despite the fact that Sekisui has made a real effort to minimize the harm done by that destruction, it is unable to rebut the presumption of prejudice because an unknowable .amount of ESI of Hart, Ayres, and potentially others, was permanently destroyed and remains irretrievable. The Harts’ inability to use the missing emails , to attempt to prove “routine compliance” with FDA regulations may be as prejudicial to the Harts as depriving a party of access to a “smoking gun” document. As such, I am left with the “definite and firm conviction that a mistake has been committed,”93 that the destruction of Hart’s and Ayres’ ESI was willful and that prejudice is therefore presumed. The Magistrate Judge’s Decision denying the Harts’ motion for sanctions was therefore “clearly erroneous.”94 ' I emphasize that prejudice is only presumed when determining whether an adverse inference instruction will be given. The jury may still determine that the Harts were not prejudiced by Sekisui’s willful destruction of ESI and decline to draw any adverse inference.
D. Sanctions Imposed
Because I find it clearly erroneous and contrary to law, the Memorandum Decision is reversed insofar as it refused to impose sanctions on Sekisui for the destruction of ESI. As discussed, Sekisui (1) willfully and permanently destroyed the ESI of at least two key players in this litigation; (2) failed to impose a litigation hold for more than a year after the duty to preserve arose, despite the fact that Sekisui is the Plaintiff in this action and, as such, irrefutably knew that litigation could arise; and (3) failed to advise its IT vendor of such litigation hold for nearly six months after (belatedly) imposing such hold. Accordingly, the Harts’ request for an adverse inference jury instruction is granted. I will give the following jury charge:
The Harts have shown that Sekisui destroyed relevant evidence. This is known as the “spoliation of evidence.”
Spoliation is the destruction of evidence or the failure to preserve property for another’s use as evidence in pending or reasonably foreseeable litigation. To demonstrate that spoliation occurred, *510several elements must be proven by a preponderance of the evidence:
First, that relevant evidence was destroyed after the duty to preserve arose. Second, that the evidence lost would have been favorable to the Harts.
As to the first element I instruct you, as a matter of law, that Sekisui failed to preserve relevant evidence after its duty to preserve arose. This failure resulted from an employee’s intentional directive given to ADI’s information technology vendor to destroy the email files of — at least — Richard Hart and Leigh Ayres. Moreover, this failure resulted from Sekisui’s gross negligence in performing its discovery obligations. I direct you that I have already found as a matter of law that this lost evidence is relevant to the issues in this case.
As to the second element, you may presume, if you so choose, that such lost evidence would have been favorable to the Harts. In deciding whether to adopt this presumption, you may take into account the egregiousness of the plaintiffs’ conduct in failing to preserve the evidence.
Sekisui offered evidence that, although evidence was lost and it may have been relevant, nevertheless such evidence would not have been favorable to the Harts.
If you decline to presume that the lost evidence would have been favorable to the Harts, then your consideration of the lost evidence is at an end, and you will not draw any inference arising from the lost evidence.
However, if you decide to presume that the lost evidence would have been favorable to the Harts, you must next decide whether Sekisui rebutted that presumption. If you determine that Sekisui rebutted the presumption that the lost evidence was favorable to the Harts, you will not draw any inference arising from the lost evidence against Sekisui. If, on the other hand, you determine that Sekisui has not rebutted the presumption that the lost evidence was favorable to the Harts, you may draw an inference against Sekisui and in favor of the Harts — namely that the lost evidence would have been favorable to the Harts.
In addition, Sekisui is subject to monetary sanctions. The Harts are entitled to an award of reasonable costs, including attorneys’ fees, associated with bringing this motion. The Harts shall submit a reasonable fee application to this Court for approval.
Sekisui’s argument that the Harts were not prejudiced by the destruction of this ESI is not lost on this Court. Nor is the fact that Sekisui has recovered thousands of Hart’s and Ayres’ emails and thousands of other non-email documents. Sekisui remains free to make this argument to the jury and the jury remains free to accept that argument should it find, by a preponderance of the evidence, that the Harts were not prejudiced by Sekisui’s failure to meet its discovery obligations.
VI. CONCLUSION
In light of the foregoing, I reverse the Order of the Magistrate Judge declining to award sanctions for the destruction of ESI. The Harts’ request for sanctions in the form of an adverse inference jury instruction is granted. The Clerk of the Court is directed to close this motion (Dkt. No. 43). A status conference is scheduled for Tuesday, August 26 at 4:30 p.m.
SO ORDERED.