Celgene Corporation v. Mylan Pharmaceuticals Inc. ( 2021 )


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  • Case: 21-1154    Document: 50    Page: 1     Filed: 11/05/2021
    United States Court of Appeals
    for the Federal Circuit
    ______________________
    CELGENE CORPORATION,
    Plaintiff-Appellant
    v.
    MYLAN PHARMACEUTICALS INC., MYLAN INC.,
    MYLAN N.V.,
    Defendants-Appellees
    ______________________
    2021-1154
    ______________________
    Appeal from the United States District Court for the
    District of New Jersey in No. 2:19-cv-05802-ES-MAH,
    Judge Esther Salas.
    ______________________
    Decided: November 5, 2021
    ______________________
    ELLYDE R. THOMPSON, Quinn Emanuel Urquhart &
    Sullivan, LLP, New York, NY, argued for plaintiff-appel-
    lant. Also represented by FRANCIS DOMINIC CERRITO,
    FRANK CHARLES CALVOSA, ERIC C. STOPS; MATTHEW J.
    HERTKO, Jones Day, Chicago, IL; JENNIFER L. SWIZE,
    Washington, DC.
    TUNG ON KONG, Wilson, Sonsini, Goodrich & Rosati,
    PC, San Francisco, CA, argued for defendants-appellees.
    Also represented by KRISTINA M. HANSON; STEFFEN
    Case: 21-1154    Document: 50     Page: 2    Filed: 11/05/2021
    2     CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.
    NATHANAEL JOHNSON, GEORGE E. POWELL, III, Washing-
    ton, DC; ELHAM FIROUZI San Diego, CA.
    ______________________
    Before PROST, CHEN, and HUGHES, Circuit Judges.
    PROST, Circuit Judge.
    This is a case about venue and pleading under the
    Hatch-Waxman Act.
    Celgene Corporation (“Celgene”) markets pomalido-
    mide as a multiple-myeloma drug under the brand name
    Pomalyst. It has patents related to that drug, but many
    drug companies viewed the validity or applicability of those
    patents with skepticism and sought to bring generic poma-
    lidomide to market. They applied to the FDA to do so;
    Celgene sued. This appeal concerns Celgene’s suit sur-
    rounding the abbreviated new drug application (“ANDA”)
    submitted by Mylan Pharmaceuticals Inc. (“MPI”).
    Celgene filed that suit in New Jersey. Celgene is head-
    quartered there, but none of the defendants are. Rather,
    MPI is based in West Virginia, Mylan Inc. in Pennsylvania,
    and Mylan N.V. in Pennsylvania and the Netherlands. The
    district court ultimately dismissed this case for improper
    venue (as to MPI and Mylan Inc.) and for failure to state a
    claim (as to Mylan N.V.). Celgene appeals.
    For the reasons below, we agree with the district court
    that venue was improper in New Jersey for the domestic-
    corporation defendants, MPI and Mylan Inc. That is,
    Celgene did not show that those defendants committed acts
    of infringement in New Jersey and have a regular and es-
    tablished place of business there. We also agree that, as to
    the foreign-corporation defendant, Mylan N.V., Celgene’s
    pleadings failed to state a claim upon which relief could be
    granted. We therefore affirm.
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    CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.       3
    I
    A
    In 1984, Congress enacted the Hatch-Waxman Act, a
    complex statutory framework that tries to balance generic
    and brand interests within the pharmaceutical industry.
    See Drug Price Competition and Patent Term Restoration
    Act of 1984, Pub. L. No. 98-417, 98 Stat. 1585. One aim of
    Hatch-Waxman was to “speed the introduction of low-cost
    generic drugs to the market.” Caraco Pharm. Labs., Ltd.
    v. Novo Nordisk A/S, 
    566 U.S. 399
    , 405 (2012); see also Eli
    Lilly & Co. v. Medtronic, Inc., 
    496 U.S. 661
    , 676 (1990).
    To market a new drug, a sponsor submits to the FDA a
    new drug application (“NDA”). See Caraco, 
    566 U.S. at 404
    . An NDA must contain the drug’s proposed labeling
    and directions for use but also must contain extensive in-
    formation on clinical trials showing that the drug is safe
    and effective for its labeled use. See 
    id.
     Brand-drug spon-
    sors are also required to inform the FDA of all its patents
    covering the drug or its labeled methods of use. See
    21 U.S.C. § 355(b)(1), (c)(2). These patents are publicly
    listed in what is known as the Orange Book. Caraco,
    
    566 U.S. at 405
    –06.
    To speed the introduction of low-cost generics, Hatch-
    Waxman includes the option for generic-drug sponsors to
    submit an abbreviated new drug application, or ANDA.
    With an ANDA, a generic-drug sponsor need not repeat a
    brand drug’s safety-and-efficacy trials at great (and scien-
    tifically redundant) expense. Instead, a generic-drug spon-
    sor must show that its product is bioequivalent to the
    reference brand drug. See 
    id.
     If so, the sponsor can market
    that generic drug with a label matching that of brand drug.
    See 
    id. at 415, 425
    .
    A generic-drug sponsor may not market a drug in a way
    that infringes a brand-drug sponsor’s patents. See 
    id. at 405
    –06; FTC v. Actavis, Inc., 
    570 U.S. 136
    , 143 (2013).
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    4       CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.
    The generic must therefore “assure the FDA” that market-
    ing the generic “will not infringe.” Actavis, 570 U.S. at 143.
    It does so through certifications to the FDA.
    An ANDA applicant might choose to avoid infringe-
    ment by waiting out a patent’s term. If so, the applicant
    includes with its ANDA a so-called paragraph III certifica-
    tion for that patent. See 21 U.S.C. § 355(j)(2)(A)(vii)(III).
    It might also omit a patented method of use from its drug
    label and therefore not seek approval in a way that impli-
    cates the patent. See 21 U.S.C. § 355(j)(2)(A)(viii); Caraco,
    
    566 U.S. at 406
    –07, 425; United Food & Com. Workers Lo-
    cal 1776 & Participating Emps. Health & Welfare Fund
    v. Takeda Pharm. Co., 
    11 F.4th 118
    , 124–27 (2d Cir. 2021).
    But an applicant might also think that a patent is invalid,
    unenforceable, or not infringed, notwithstanding its ANDA
    encompassing the same methods of use as the brand drug’s
    NDA. If so, the applicant can ask for full approval (without
    omitting any methods of use from its drug label) during the
    patent’s term and include with its ANDA a paragraph IV
    certification. See 21 U.S.C. § 355(j)(2)(A)(vii)(IV).
    Submitting an ANDA that seeks approval to market a
    drug while that drug is on-patent (e.g., an ANDA contain-
    ing a paragraph IV certification) is patent infringement.
    35 U.S.C. § 271(e)(2); see also Valeant Pharms. N. Am. LLC
    v. Mylan Pharms. Inc., 
    978 F.3d 1374
    , 1381–82 (Fed. Cir.
    2020). 1 If a generic goes the paragraph IV route, the brand
    can sue under a set of rules particular to this kind of in-
    fringement. The way this works is that the generic must
    1    That is not to say that a generic’s failure to comply
    with some procedural rule surrounding the paragraph IV
    certification renders an ANDA noninfringing. The statu-
    tory infringement question is whether the “purpose” of the
    submitted ANDA “is to obtain approval” to market the drug
    “before the expiration of [the relevant] patent.” 35 U.S.C.
    § 271(e)(2).
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    CELGENE CORPORATION     v. MYLAN PHARMACEUTICALS INC.          5
    provide a so-called paragraph IV notice to the patentee
    brand-drug sponsor after it submits its ANDA and the FDA
    confirms receipt of the submission.              See 21 U.S.C.
    § 355(j)(2)(B); see also id. § 355(j)(2)(B)(ii)(I). That notice
    must include “a detailed statement of the factual and legal
    basis of the opinion of the applicant that the patent is in-
    valid or will not be infringed.”                     21 U.S.C.
    § 355(j)(2)(B)(iv)(II). The notice and accompanying de-
    tailed statement, however, are not part of the ANDA and
    need not be submitted to the FDA. See id.; 21 C.F.R.
    § 314.95(e). Indeed, the substance of the notice letter (i.e.,
    the generic’s legal opinion) is immaterial to the FDA, which
    professes to lack “expertise” and “authority” on patent mat-
    ters.    See Caraco, 
    566 U.S. at 406
    –07; United Food,
    
    2021 WL 3744899
    , at *3; Applications for FDA Approval to
    Market a New Drug, 
    68 Fed. Reg. 36,676
    , 36,683 (June 18,
    2003) (“[W]e have long observed that we lack expertise in
    patent matters.”).
    A brand-drug sponsor that sues within 45 days of re-
    ceiving notice of a generic’s paragraph IV certification is
    entitled to an automatic thirty-month stay of FDA approval
    so the infringement and validity questions can be worked
    out in court. 21 U.S.C. § 355(j)(5)(B)(iii); Actavis, 570 U.S.
    at 143. If a brand-drug sponsor waits more than 45 days
    after it receives notice, it isn’t entitled to that stay but also
    isn’t precluded from suing later for infringement. See, e.g.,
    GlaxoSmithKline LLC v. Teva Pharms. USA, Inc., 
    7 F.4th 1320
    , 1325 (Fed. Cir. 2021); Dey Pharma, LP v. Sunovion
    Pharms. Inc., 
    677 F.3d 1158
    , 1160 (Fed. Cir. 2012); Teva
    Pharms. USA, Inc. v. Novartis Pharms. Corp., 
    482 F.3d 1330
    , 1341 (Fed. Cir. 2007); Valley Drug Co. v. Geneva
    Pharms., Inc., 
    344 F.3d 1294
    , 1297 n.5 (11th Cir. 2003). If
    the brand-drug sponsor doesn’t sue within the 45 days, the
    generic can instead bring a declaratory-judgment action “to
    obtain patent certainty.”           21 U.S.C. § 355(j)(5)(C)(i);
    35 U.S.C. § 271(e)(5); see Dey Pharma, 
    677 F.3d at 1160
    –
    61; Teva, 
    482 F.3d at 1335
    . The upshot is that the timing
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    6       CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.
    of receipt of the notice letter governs the timing of the
    availability of particular forms of relief.
    B
    In early 2017, MPI submitted an ANDA seeking ap-
    proval to market a generic version of Pomalyst before the
    expiration of four Orange-Book-listed patents. MPI in-
    cluded a paragraph IV certification as to those patents. In
    turn, Celgene sued the defendants under the Hatch-Wax-
    man Act, asserting the four listed patents.
    Celgene later obtained (and asserted) five more related
    patents. It sued the same defendants again twice—once in
    2018, asserting one of the later-issued patents, and once in
    2020, asserting another. Those cases were consolidated
    with the 2017 one. For the sake of simplicity, we call that
    consolidated six-patent action “the first case.” 2 In 2019,
    Celgene asserted the remaining three of the later-issued
    patents (again against these defendants, again in New Jer-
    sey) through a largely identical complaint. That’s this
    case. 3 This procedural bookkeeping matters because this
    case, though not consolidated with the first, shared Rule 12
    briefing with it. That is, the parties stipulated that the
    resolution of motions to dismiss in the first case would gov-
    ern this one too. See J.A. 220–23.
    Celgene filed its first case in May 2017. The defend-
    ants-appellees moved to dismiss for improper venue and
    failure to state a claim in August 2017. That motion was
    denied in March 2018 without prejudice so that the parties
    could engage in venue-related discovery.
    2   Celgene Corp. v. Hetero Labs Ltd., No. 17-cv-3387
    (D.N.J.).
    3    Celgene Corp. v. Mylan Pharms., No. 19-cv-5802
    (D.N.J.).
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    CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.        7
    After two years of that discovery, the defendants re-
    newed their motion to dismiss. The district court reviewed
    the motion under In re Cray Inc., 
    871 F.3d 1355
     (Fed. Cir.
    2017), and concluded that venue was improper. Namely,
    the thin set of facts that Celgene had gathered after those
    two years—the presence of affiliated entities and employ-
    ees in New Jersey—failed to show a “regular and estab-
    lished place of business” of the defendants in the district
    under 28 U.S.C. § 1400(b).
    The district court also concluded that, for Mylan N.V.,
    Celgene had failed to state a claim upon which relief could
    be granted. That is, the ANDA that Celgene itself included
    with its complaint sought approval only on behalf of MPI.
    And Celgene’s pleadings with respect to the involvement of
    Mylan N.V. in that submission were simply too speculative
    and conclusory. In doing so, the district court also rejected
    Celgene’s request in the alternative for leave to amend its
    pleadings.
    Celgene appeals. We have jurisdiction under 28 U.S.C.
    § 1295(a)(1).
    II
    First we turn to the district court’s dismissal of MPI
    and Mylan Inc. for improper venue.
    We review de novo whether venue under § 1400(b) is
    proper. 4 Valeant, 978 F.3d at 1381. The plaintiff has the
    burden of establishing proper venue under that provision.
    Andra Grp., LP v. Victoria’s Secret Stores, L.L.C., 
    6 F.4th 1283
    , 1287 (Fed. Cir. 2021).
    To establish venue, a plaintiff may show either that the
    defendant “resides” in a particular district or that it “has
    committed acts of infringement and has a regular and
    4  Federal Circuit law applies to this issue, which is
    unique to patent law. Valeant, 978 F.3d at 1381.
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    8       CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.
    established place of business” there. 28 U.S.C. § 1400(b).5
    No one argues that the defendants-appellees reside in New
    Jersey. And so Celgene has the burden of meeting both
    portions of the other prong of § 1400(b)—that is, showing
    both the defendants’ acts of infringement in the district and
    their regular and established place of business there. The
    district court concluded that it had not met that burden
    with respect to MPI and Mylan Inc. For the reasons below,
    the district court was correct.
    A
    First, we address whether MPI and Mylan Inc. “com-
    mitted acts of infringement” in New Jersey. We conclude
    that they did not.
    1
    As we have repeatedly observed, “the Supreme Court
    has instructed that the requirement of venue is specific and
    unambiguous; it is not one of those vague principles [that],
    in the interests of some overriding policy, is to be given a
    liberal construction.” Andra, 6 F.4th at 1287 (cleaned up)
    5   Celgene also argues—largely on policy grounds—
    that venue in Hatch-Waxman cases should be governed by
    28 U.S.C. § 1391(c), the general venue provision. But TC
    Heartland and Valeant say otherwise. The Supreme Court
    in TC Heartland reaffirmed that § 1400(b) is the sole and
    exclusive provision controlling venue in patent infringe-
    ment actions. TC Heartland LLC v. Kraft Foods Grp.
    Brands LLC, 
    137 S. Ct. 1514
    , 1519 (2017). And this court
    in Valeant reiterated that submitting an ANDA is an act of
    infringement for purposes of § 1400(b).             978 F.3d
    at 1381–82. It follows that § 1400(b) is the sole venue pro-
    vision with respect to domestic defendants in Hatch-Wax-
    man actions. See also Valeant, 978 F.3d at 1382 (“Congress
    enacted § 1400(b) in 1948 to be a standalone venue statute
    for patent cases.”).
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    CELGENE CORPORATION    v. MYLAN PHARMACEUTICALS INC.         9
    (citing Schnell v. Peter Eckrich & Sons, Inc., 
    365 U.S. 260
    ,
    264 (1961)); see also In re Google LLC, 
    949 F.3d 1338
    , 1346
    (Fed. Cir. 2020) (“[T]he Supreme Court has cautioned
    against a broad reading of the venue statute.”). Time and
    again “we have narrowly construed the requirements of
    venue in patent cases.” Valeant, 978 F.3d at 1379.
    This court in Valeant recently addressed venue under
    Hatch-Waxman. We reiterated that “venue in Hatch-Wax-
    man cases must be predicated on past acts of infringe-
    ment.” Valeant, 978 F.3d at 1381. And for the purposes of
    the Hatch-Waxman Act, “it is the submission of the ANDA,
    and only the submission, that constitutes an act of infringe-
    ment in this context.” Id. In so holding, we expressly re-
    jected relying on the contemplated future conduct of the
    generic-drug sponsor. Id. at 1381–83.
    2
    Celgene argues that the defendants have committed
    acts of infringement in New Jersey. Here, the alleged in-
    fringing act is the submission of the ANDA. See 35 U.S.C.
    § 271(e)(2); Valeant, 978 F.3d at 1381. The question is
    where the submission occurred and what acts it includes.
    First, Celgene argues that the “artificial act of infringe-
    ment stemming from the ANDA submission extends na-
    tionwide” (i.e., wherever the generic drug will be marketed
    and sold). Relatedly, it contends that the effects of the
    ANDA submission will be “felt” in New Jersey. But Vale-
    ant squarely forecloses Celgene’s position. Venue must be
    “predicated on past acts of infringement.”            Valeant,
    978 F.3d at 1381. For Hatch-Waxman cases, this means
    venue is proper “where an ANDA-filer submits its ANDA
    to the FDA,” not “wherever future distribution of the ge-
    neric is contemplated.” Id. at 1378–79; see also id. at 1384.
    Second, Celgene argues that, because MPI sent a par-
    agraph IV notice letter from West Virginia to Celgene’s
    headquarters in New Jersey, acts of infringement occurred
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    10    CELGENE CORPORATION    v. MYLAN PHARMACEUTICALS INC.
    in New Jersey. The notice letter is mandatory and the
    ANDA must be amended later to include proof that it was
    delivered. See 21 C.F.R. § 314.95(a), (e). So, says Celgene,
    receipt of the letter by the brand sponsor is part of the “act
    of infringement” for venue purposes. We disagree.
    This court in Valeant stated that “[u]nder the plain lan-
    guage of the statute, the only past infringing act is the
    ANDA submission, which creates the right to bring suit in
    the first instance.” 978 F.3d at 1382. Celgene argues that
    infringement for venue purposes includes all “acts that are
    ‘sufficiently related to the ANDA submission.’” See, e.g.,
    Appellant’s Br. 48, 50, 51 (quoting Valeant, 978 F.3d
    at 1384). Celgene is incorrect. While the court took care
    not to prematurely “define what all relevant acts involved
    in the preparation and submission of an ANDA might be,”
    Valeant, 978 F.3d at 1384 n.8, it did make clear that it is
    the submission that infringes, id. at 1381–82. Valeant’s fo-
    cus on the submission itself (along with acts involved in its
    “preparation”) indicates that the relevant infringing acts
    must, at a minimum, fairly be part of the submission—not
    merely “related to” it in some broader sense. See id.
    at 1384 (considering whether “acts occurred” in the district
    “that would suffice to categorize those taking them as a
    ‘submitter’ under § 271(e)”). After all, the relevant prong
    of § 1400(b) restricts venue to “where the defendant has
    committed acts of infringement”—not where the defendant
    has committed acts related to (but not part of) acts of in-
    fringement. See Valeant, 978 F.3d at 1381 (“[I]t is the sub-
    mission of the ANDA, and only the submission, that
    constitutes an act of infringement in this context.”).
    With this in mind, we turn to Celgene’s argument that
    receipt of the notice letter is an infringing act in New Jer-
    sey. Celgene says that the notice letter is an “essential part
    of the ANDA submission” itself, Appellant’s Br. 50, and
    that the defendants “had to undertake an act in New Jer-
    sey to fulfill its requirements for its ANDA submission,”
    Reply Br. 25. But the statute and regulations treat the
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    CELGENE CORPORATION     v. MYLAN PHARMACEUTICALS INC.        11
    infringing ANDA submission and the notice letter as dif-
    ferent things. For example, the initial ANDA submission
    to the FDA requires the applicant to state that it “will give
    notice”—and such notice “shall” be given “not later than
    20 days after” the date that the FDA confirms that the
    ANDA has been filed. 21 U.S.C. § 355(j)(2)(B)(i), (ii)(I);
    21 C.F.R. § 314.95(b)(1). Indeed, the ANDA applicant can-
    not send the notice letter before the FDA has confirmed re-
    ceipt of the ANDA. 21 C.F.R. § 314.95(b)(2). The notice
    letter itself is even required to state that an ANDA “has
    been submitted.” 21 U.S.C. § 355(j)(2)(B)(iv); 21 C.F.R.
    § 314.95(c)(1) (specifying that “the notice must include,”
    among other things, “[a] statement that [the] FDA has re-
    ceived an ANDA submitted by the applicant”). And the ap-
    plicant is under no obligation to send a copy of the notice
    letter itself to the FDA. 21 C.F.R. § 314.95(e) (“A copy of
    the notice itself need not be submitted to the Agency.”); id.
    § 314.95(b)(3) (similar). Further, one statutory provision
    separately references “the date on which the [para-
    graph IV] notice is received” and “the date on which the ap-
    plication . . . was submitted.” 21 U.S.C. § 355(j)(5)(B)(iii).
    Under the statute and regulations, then, receipt of the no-
    tice letter occurs after and apart from the submission of the
    ANDA.
    Celgene argues that infringement under 35 U.S.C.
    § 271(e)(2) occurs only once the ANDA filing contains a par-
    agraph IV certification—and therefore that receiving the
    notice letter is part of the infringing act because it “triggers
    the patent owner’s infringement claim.”            Appellant’s
    Br. 49–50. We disagree. First, as we explained above, the
    paragraph IV certification in the ANDA precedes the notice
    letter. And although receipt of the letter influences the
    timing of the lawsuit by setting a 45-day cutoff after which
    the patentee cannot get an automatic 30-month stay of fi-
    nal approval, the letter itself does not establish the cause
    of action. The ANDA submission does. The statute itself
    says that it is an act of infringement to “submit . . . an
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    12    CELGENE CORPORATION     v. MYLAN PHARMACEUTICALS INC.
    [ANDA] application” “if the purpose . . . is to obtain ap-
    proval” to market the drug “before the expiration of” a rel-
    evant patent. 35 U.S.C. § 271(e)(2). Celgene points to no
    authority suggesting either that an ANDA with noncompli-
    ant notice doesn’t infringe or that it can never sue for in-
    fringement if the generic doesn’t comply with the
    formalities of the notice provision.
    Under § 271(e)(2), submitting an ANDA is the act of in-
    fringement. And although the ANDA applicant must later
    send a notice letter and inform the FDA of the letter’s re-
    ceipt, that all happens after the infringing submission.
    Sending a paragraph IV notice letter does not fall within
    “submitting” the ANDA under the meaning of Valeant. Ac-
    cordingly, we conclude that Celgene did not establish that
    the defendants-appellees committed an act of infringement
    in New Jersey.
    B
    Next we address whether MPI and Mylan Inc. had a
    “regular and established place of business” in New Jersey.
    We conclude that they did not.
    1
    To show that a defendant has a regular and established
    place of business, there are three requirements: “(1) there
    must be a physical place in the district; (2) it must be a reg-
    ular and established place of business; and (3) it must be
    the place of the defendant.” Cray, 871 F.3d at 1360. Venue
    is improper if any of those three is not satisfied. See id.
    The third requirement is particularly relevant here.
    The place must be “of the defendant, not solely . . . of the
    defendant’s employee.” Id. at 1362–63. Accordingly, “the
    defendant must establish or ratify the place of business,”
    and it is “not enough that the employee does so on his or
    her own.” Id.
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    CELGENE CORPORATION    v. MYLAN PHARMACEUTICALS INC.       13
    We have observed that in the venue inquiry “no precise
    rule has been laid down and each case depends on its own
    facts.” Id. at 1362. But as to the third requirement, we
    have discussed non-exhaustive relevant factors, including
    (1) “whether the defendant owns or leases the place, or ex-
    ercises other attributes of possession or control over the
    place”; (2) “whether the defendant conditioned employ-
    ment on” “an employee’s continued residence in the dis-
    trict” or “the storing of materials at a place in the district
    so that they can be distributed or sold from that place”;
    (3) “a defendant’s representations” about that place, in-
    cluding advertisements; and (4) “the nature and activity of
    the alleged place of business of the defendant in the district
    in comparison with that of other places of business of the
    defendant in other venues.” Id. at 1363–64.
    2
    No one argues that either MPI or Mylan Inc. itself has
    any fixed, physical presence in New Jersey. Instead,
    Celgene offers two theories to impute venue to those de-
    fendants: first, through places associated with Mylan em-
    ployees, and second, through places associated with Mylan
    affiliates. We discuss each in turn.
    i
    First, Celgene contends that certain employee-associ-
    ated locations should be imputed to MPI and Mylan Inc.
    Celgene first points to a handful of homes in New Jer-
    sey. Those homes belong to MPI or Mylan Inc. employees.
    In total, MPI and Mylan Inc. have tens of thousands of em-
    ployees. Seventeen live in New Jersey. J.A. 2311 The de-
    fendants-appellees also presented evidence that neither
    MPI nor Mylan Inc. (1) required or instructed those em-
    ployees to live in New Jersey, (2) pays for their homes,
    (3) requires the employees to store materials in the homes
    or in New Jersey, or (4) pays for secretarial or support staff
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    14       CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.
    to work at the homes. J.A. 2311. These specific facts went
    undisputed. J.A. 57–58.
    Celgene argues that MPI and Mylan Inc.’s representa-
    tions to the public show that the homes are places of the
    defendants. But Celgene doesn’t point to advertising or
    marketing identifying the personal homes as places of busi-
    ness. And even if it had, the fact “that a defendant has
    advertised that it has a place of business or has even set up
    an office is not sufficient; the defendant must actually en-
    gage in business from that location.” Cray, 871 F.3d
    at 1364.
    Celgene instead points to a roster of employees who live
    in the state, a handful of business cards with employee
    names and New Jersey home addresses, and two LinkedIn
    profiles mentioning New Jersey. Without more, this is all
    too speculative to show ratification of those addresses as
    MPI’s or Mylan Inc.’s places of business (much less that the
    employees themselves regularly conducted business specif-
    ically at their homes). Indeed, it is not enough “that there
    exists within the district a physical location where an em-
    ployee of the defendant carries on certain work for his em-
    ployer.” Id. at 1366.
    Celgene also identifies a job posting (listing no specific
    Mylan entity) asking that candidates live in New Jersey or
    “within reasonable driving distance.” 6            See, e.g.,
    J.A. 2549–51. The undated posting does little to illuminate
    MPI’s or Mylan Inc.’s employment requirements in 2017.
    Indeed, we agree with the district court that the record
    shows no requirement to actually live in New Jersey or any
    restriction on moving out of state once there.            See
    J.A. 60–61. And we have observed that an employee’s
    6  The district court properly disregarded several
    other job postings as being insufficiently relevant, being
    unrelated to New Jersey in 2017. See J.A. 60 n.5.
    Case: 21-1154    Document: 50      Page: 15     Filed: 11/05/2021
    CELGENE CORPORATION    v. MYLAN PHARMACEUTICALS INC.        15
    ability to move “out of the district at his or her own insti-
    gation, without the approval of the defendant . . . cut[s]
    against the employee’s home being considered a place of
    business of the defendant.” Cray, 871 F.3d at 1363.
    At bottom, this case is like Cray. There, the defendant
    did not rent or own an office or any property in the district,
    but it allowed two employees to work remotely from their
    homes there. Cray, 871 F.3d at 1357. The company iden-
    tified the employees’ home numbers in business communi-
    cations, and they worked as local territory managers and
    sales executives in the region. See id. But the company did
    not maintain products at their homes, the company did not
    pay for their homes, and no one advertised their homes as
    the company’s place of business. Id. Similarly, MPI and
    Mylan Inc. “allowed” its employees to work from the dis-
    trict. But there was “no indication” that MPI or Mylan Inc.
    “own[], lease[], or rent[]” their homes, that they “played a
    part in selecting the [homes’] location, stored inventory or
    conducted demonstrations there, or conditioned . . . em-
    ployment or support on the maintaining of” a home in New
    Jersey. See id. at 1365. And even if evidence here might
    suggest that MPI or Mylan “believed a location within
    [New Jersey] to be important to the business performed,”
    there is no evidence that MPI or Mylan Inc. “had any in-
    tention to maintain some place of business in that district”
    if the employees were to “decide[] to terminate their resi-
    dences.” Id. In view of the specific evidence here, the em-
    ployee homes here are not places “of the defendant.” 7
    7   Celgene argues for the first time on appeal that
    “the fact that service of process could be effectuated on MPI
    and Mylan Inc. at their employees’ homes” confirms that
    § 1400(b) is satisfied. See Appellant’s Br. 38. Celgene
    doesn’t dispute that it didn’t raise this point at the district
    court. Reply Br. 17. The underlying record on this point
    is, accordingly, underdeveloped, and the appellees
    Case: 21-1154    Document: 50     Page: 16    Filed: 11/05/2021
    16    CELGENE CORPORATION    v. MYLAN PHARMACEUTICALS INC.
    Beyond the homes, Celgene also points to two small
    storage lockers rented by MPI sales or marketing employ-
    ees to store product samples. Those lockers are rented in
    the employees’ own names. They are used to intermittently
    store and access product samples. There is no evidence, in
    contrast, that they are used like warehouses—for order ful-
    fillment, wholesaling, retail, or the like. As the appellees
    point out, Celgene offered no evidence that MPI or Mylan
    maintain that Celgene has forfeited this argument. See In
    re Google Tech. Holdings LLC, 
    980 F.3d 858
    , 862–63
    (Fed. Cir. 2020). We agree, and we are also skeptical on
    the merits. Even if we accepted Celgene’s argument that
    some employees could accept service of process on behalf of
    the defendants at their homes, Celgene has not demon-
    strated that this would make the employees’ homes the de-
    fendant’s place of business. The patent service provision,
    28 U.S.C. § 1694, states that an agent “conducting” the de-
    fendant’s business can accept service in a district in which
    the defendant “has a regular and established place of busi-
    ness.” But courts considering the question have held that
    § 1694 is not the exclusive basis for service of process in a
    patent-infringement action. Rule 4 of the Federal Rules of
    Civil Procedure provides for service of process not neces-
    sarily predicated on a regular and established place of busi-
    ness of the defendant. See, e.g., Welch Sci. Co. v. Human
    Eng’g Inst., Inc., 
    416 F.2d 32
    , 34 (7th Cir. 1969);
    14D Wright & Miller, Federal Practice & Procedure § 3823
    (4th ed., Apr. 2021 update). We therefore tend to agree
    with the appellees that, although the presence of a defend-
    ant’s regular and established place of business in a district
    implies that service is proper on agents there, the presence
    of employees who can accept service does not by itself es-
    tablish the existence of the defendant’s regular and estab-
    lished place of business at those employees’ location.
    Regardless, given Celgene’s argument forfeiture and evi-
    dentiary failures, we need not decide the issue.
    Case: 21-1154    Document: 50       Page: 17   Filed: 11/05/2021
    CELGENE CORPORATION    v. MYLAN PHARMACEUTICALS INC.       17
    Inc. requires its employees to store materials anywhere in
    New Jersey or that renting lockers in New Jersey was an-
    ything but the employees’ choice. Nor did Celgene offer any
    evidence that either MPI or Mylan Inc. owns, leases, pos-
    sesses, or controls the lockers. And Celgene hasn’t pointed
    to any advertisements or other representations holding
    them out as places of MPI or Mylan Inc.
    Celgene mainly points to testimony that some employ-
    ees needed to access the lockers “as part of [their] job.” But
    even if MPI or Mylan Inc. required employees to have ac-
    cess to pharmaceutical samples (wherever they ended up
    being stored), no evidence suggests that they were required
    to specifically use lockers in New Jersey in the first place.
    Accordingly, the testimony cites does not support a reason-
    able inference that MPI or Mylan Inc. established or rati-
    fied New Jersey–based lockers as a place of business. In
    our view, then, the lockers are not places “of the defend-
    ant.” Nor do they bolster that the employees’ homes were
    such places, as Celgene suggests in the alternative.
    Celgene finally argues that even if the homes or lockers
    cannot individually be considered regular and established
    places of business, they should together be deemed as
    much. But even setting aside that Celgene points to no
    case endorsing its aggregate-place theory—one in which we
    would “assess[] venue on a district-by-district rather than
    address-by-address basis,” Appellant’s Br. 41—we are un-
    convinced that the homes and lockers even lumped to-
    gether would be “of the defendant” under the facts of this
    case.
    In summary, the employee-associated locations are not
    a regular and established place of business of the defend-
    ants under § 1400(b).
    ii
    In the alternative, Celgene emphasizes that a now-de-
    funct entity—Mylan Laboratories Inc. (“MLI”)—had a
    Case: 21-1154    Document: 50      Page: 18    Filed: 11/05/2021
    18    CELGENE CORPORATION    v. MYLAN PHARMACEUTICALS INC.
    physical office in New Jersey. In its view, that office should
    be imputed to MPI and Mylan Inc. for venue purposes. We
    disagree.
    MLI, before it dissolved in 2017, was a Delaware cor-
    poration with an office in New Jersey. J.A. 68. Through a
    chain of ownership, it was indirectly wholly owned by MPI.
    J.A. 68.
    At the district court, Celgene argued an alter-ego the-
    ory predicated on the defendants’ disregard of corporate
    formalities, contending that all the Mylan entities were ef-
    fectively operating as a single company. J.A. 62, 3154. In
    the alternative, it argued that a showing of alter ego or
    abuse of the corporate form wasn’t required. J.A. 62.
    The district court was not convinced. It surveyed vari-
    ous cases, concluding that the majority view is that a sub-
    sidiary’s presence isn’t imputed to a parent for venue
    unless the parties “disregarded the corporate form in their
    dealings with their respective subsidiaries and affiliates.”
    J.A. 66. And that wasn’t shown, the district court con-
    cluded. We agree.
    Venue may be imputed under an alter-ego or veil-pierc-
    ing theory. See Andra, 6 F.4th at 1289; Minn. Min. & Mfg.
    Co. v. Eco Chem, Inc., 
    757 F.2d 1256
    , 1265 (Fed. Cir. 1985)
    (“3M”). But “where related companies have maintained
    corporate separateness, the place of business of one corpo-
    ration is not imputed to the other for venue purposes.” An-
    dra, 6 F.4th at 1289. Corporate separateness is an issue of
    regional-circuit law. See Wechsler v. Macke Int’l Trade,
    Inc., 
    486 F.3d 1286
    , 1295 (Fed. Cir. 2007). The relevant
    veil-piercing theory in the Third Circuit is called the “alter
    ego” doctrine, among other names. See Pearson v. Compo-
    nent Tech. Corp., 
    247 F.3d 471
    , 484 & n.2 (3d Cir. 2001).
    Under that doctrine, courts will disregard the corporate
    form to “prevent fraud, illegality, or injustice,” “when
    recognition of the corporate entity would defeat public pol-
    icy or shield someone from liability for a crime,” or “when
    Case: 21-1154    Document: 50      Page: 19    Filed: 11/05/2021
    CELGENE CORPORATION    v. MYLAN PHARMACEUTICALS INC.       19
    the parent so dominated the subsidiary that it had no sep-
    arate existence.” 
    Id. at 484
     (first quoting Zubik v. Zubik,
    
    384 F.2d 267
    , 272 (3d Cir. 1967); and then quoting N.J.
    Dep’t of Env’t Prot. v. Ventron Corp., 
    468 A.2d 150
    , 164
    (N.J. 1983)). 8 Among other possible considerations, the
    Third Circuit looks at “gross undercapitalization, failure to
    observe corporate formalities, nonpayment of dividends,
    insolvency of the [subsidiary] corporation, siphoning of
    funds from the [subsidiary] corporation by the dominant
    stockholder, nonfunctioning of officers and directors, ab-
    sence of corporate records, and whether the corporation is
    merely a facade for the operations of the dominant stock-
    holder.” 
    Id. at 484
    –85 & n.2; see also Trinity Indus., Inc.
    v. Greenlease Holding Co., 
    903 F.3d 333
    , 365 (3d Cir. 2018).
    In the end, this is an inquiry into whether the entities’ sep-
    arateness “is little more than a legal fiction”—a “notori-
    ously difficult” burden.        Pearson, 
    247 F.3d at 485
    .
    Plaintiffs “must essentially demonstrate that in all aspects
    of the business, the two corporations actually functioned as
    a single entity.” 
    Id.
     A court “consider[s] whether veil pierc-
    ing is appropriate in light of the totality of the circum-
    stances.” Trinity Indus., 903 F.3d at 365.
    Against this standard, Celgene’s factual offerings come
    up short. Namely, Celgene pointed to shared marketing,
    branding, and trade names, as well as MLI’s involvement
    in procuring pomalidomide for ANDA preparation (as well
    as other unspecified preparatory aspects). Appellant’s
    8   The appellees argued and the district court con-
    cluded that there must also be a showing of “extraordinary
    circumstances, such as fraud or injustice.” Appellees’
    Br. 32 (citing Linus Holding Corp. v. Mark Line Indus.,
    LLC, 
    376 F. Supp. 3d 417
    , 425 & n.4 (D.N.J. 2019)); J.A. 67,
    75 (similar). Because Celgene fails to show a disregard of
    corporate separateness, we need not reach that issue of
    Third Circuit law.
    Case: 21-1154     Document: 50     Page: 20    Filed: 11/05/2021
    20       CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.
    Br. 44 (citing J.A. 2487–88, 2494–96, 2499, 2534); J.A. 69–
    70. It also pointed to a Mylan Inc. employee signing MLI’s
    lease termination when it dissolved and directing future
    correspondence to it. Appellant’s Br. 44 (citing J.A. 2410,
    2517, 2528); J.A. 69–70. But “courts have refused to pierce
    the veil even when subsidiary corporations use the trade
    name of the parent, accept administrative support from the
    parent, and have a significant economic relationship with
    the parent.” Pearson, 
    247 F.3d at 485
    . Celgene also points
    out that MLI’s sole officer was also an officer of Mylan Inc.
    and that the corporations all sit in a common web of own-
    ership. Appellant’s Br. 43–44 & n.7 (citing J.A. 2405–06,
    2408, 2531–32). But it is a “well established principle” of
    corporate law “that directors and officers holding positions
    with a parent and its subsidiary can and do ‘change hats’
    to represent the two corporations separately, despite their
    common ownership.” United States v. Bestfoods, 
    524 U.S. 51
    , 69 (1998); Trinity Indus., 903 F.3d at 367 (“[D]uplica-
    tion of some or all of the directors or executive officers is
    not fatal to maintaining legally distinct corporate forms.”
    (cleaned up)). And as the district court observed, there is
    no evidence showing, for instance, dominion of MLI’s fi-
    nances, policy, or business practices. See J.A. 67. Nor did
    Celgene show that MLI is “undercapitalized or insolvent,
    that its officers and directors are strawmen, or that MLI
    lacks its own books and records.” See J.A. 70–71.
    At most, the evidence shows collaboration, not com-
    monality. Celgene has not met its burden of showing that
    corporate separateness has not been maintained with re-
    spect to MLI. 9
    9  Celgene points to various instances of possible
    form-blurring between MPI, Mylan Inc., and Mylan N.V.
    E.g., Appellant’s Br. 46–47 (discussing mutual review of
    ANDA filing and instance of reporting of single employee
    of one entity to employee of another). In our view, however,
    Case: 21-1154    Document: 50     Page: 21    Filed: 11/05/2021
    CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.       21
    Celgene alternatively argues that there is enough in-
    terrelatedness here, even absent a showing of alter ego, to
    impute venue wholesale from a subsidiary to its parent.
    See Appellant’s Br. 43. But Celgene’s cited cases do not
    support this view.
    First, Celgene argues that this court in 3M said that
    “the acts of another, intimately connected, corporation”
    could be enough to import venue across the board, “even
    absent a showing of alter ego.” See Appellant’s Br. 43. But
    that misreads 3M. That case remarked that a “piercing the
    corporate veil” theory could be appropriate to impute
    venue. 3M, 
    757 F.2d at 1265
    . It also commented that “in-
    fringement within the district by a wholly owned subsidi-
    ary can be considered infringement by the parent
    corporation for the purposes of [venue if] fraud upon or in-
    justice to the plaintiff are present.” 
    Id. at 1265
    . It ex-
    plained that the “corporate form is not readily brushed
    aside” and that “alter ego” is applied only if the record
    “clearly support[s] disregard of the corporate fiction on
    grounds of fundamental equity and fairness.” 
    Id. at 1264
    .
    And, importantly, in that case this court did find alter ego.
    See 
    id. at 1264
    –65 (basing alter-ego finding on lack of cor-
    porate formalities and manipulation of form to thwart re-
    covery of judgment).
    Second, Celgene relies on Leach. See Leach Co. v. Gen.
    Sani-Can Mfg. Corp., 
    393 F.2d 183
    , 184 (7th Cir. 1968).
    But the Leach court also found alter ego. See 
    id.
     And there,
    the entities in question “did not observe even the form of
    corporate separation,” and “freely disregarded their sepa-
    rateness” in practice, under the specific facts of that case.
    
    Id. at 186
    . And so Leach too provides no support for
    Celgene’s alter-ego-free venue-imputation argument.
    this evidence does not move the needle on whether the cor-
    porate form was disregarded as to those firms and MLI.
    Case: 21-1154      Document: 50     Page: 22    Filed: 11/05/2021
    22        CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.
    Third, Celgene cites a handful of district-court cases for
    the proposition that showing alter ego or veil-piercing isn’t
    necessary. E.g., Appellant’s Br. 43 (citing Javelin Pharm.,
    Inc. v. Mylan Labs. Ltd., No. 16-cv-224, 
    2017 WL 5953296
    ,
    at *3–4 (D. Del. Dec. 1, 2017)); J.A. 65. We agree with the
    district court, however, that these cases answered a differ-
    ent question: whether the patentee stated a “non-frivolous
    basis to warrant venue-based discovery.” See J.A. 65.
    In all, Celgene’s cited cases don’t support the wholesale
    imputation of venue here. And Celgene has identified no
    authority showing that affiliation or shared activities alone
    are enough.
    Of course, it might be that a parent corporation might
    specifically ratify a subsidiary’s place of business, even if
    the two do maintain corporate separateness. See, e.g., An-
    dra, 6 F.4th at 1289. But Celgene hasn’t argued that MPI
    or Mylan Inc. ratified MLI’s New Jersey office. 10 Nor has
    Celgene argued that MLI’s office was MPI’s or Mylan Inc.’s
    under an agency theory. See J.A. 63; Andra, 6 F.4th
    at 1287–89.
    In conclusion, Celgene has not met its burden to show
    a lack of corporate separateness such that MLI’s place of
    business should be imputed to the defendants—nor pro-
    vided any other reason to disregard the corporate distinc-
    tion between them. And Celgene has not otherwise shown
    that MPI and Mylan Inc. established or ratified MLI’s New
    Jersey office. Accordingly, that office is not a regular and
    10  Celgene appears to have broadly argued that
    Mylan N.V. (for which venue would be proper) ratified the
    “collective business of Mylan entities conducted at physical
    places in the district.” See Appellant’s Br. 45. But it didn’t
    argue this as to MPI or Mylan Inc., and, as discussed later,
    Celgene didn’t adequately state a claim against Mylan N.V.
    anyway.
    Case: 21-1154    Document: 50        Page: 23   Filed: 11/05/2021
    CELGENE CORPORATION    v. MYLAN PHARMACEUTICALS INC.        23
    established place of business of the defendants under
    § 1400(b).
    ***
    As in Cray, we stress that “each case depends on its
    own facts” and that, here, “no one fact is controlling.”
    871 F.3d at 1362, 1366. “But taken together, the facts can-
    not support a finding that” the defendants “established a
    place of business in” New Jersey. See id. Venue is there-
    fore not proper as to MPI and Mylan Inc. under § 1400(b).
    III
    We move next from the propriety of venue to the ade-
    quacy of the pleadings. The district court dismissed
    Celgene’s complaint against Mylan N.V. for failure to state
    a claim. It also denied Celgene’s request in the alternative
    for leave to amend that complaint. We agree on the first
    point and conclude that the district court did not abuse its
    discretion on the second.
    A
    The district court dismissed Celgene’s complaint
    against Mylan N.V. for failure to state a claim under
    Rule 12(b)(6), holding that Celgene hadn’t made any non-
    conclusory allegations that Mylan N.V. “submitted” the
    ANDA under the meaning of 35 U.S.C. § 271(e)(2).
    We review a dismissal under Rule 12(b)(6) de novo. 11
    Tatis v. Allied Interstate, LLC, 
    882 F.3d 422
    , 426 (3d Cir.
    2018). A complaint “must contain sufficient factual matter,
    accepted as true, to ‘state a claim to relief that is plausible
    on its face.’” 
    Id.
     (quoting Ashcroft v. Iqbal, 
    556 U.S. 662
    ,
    678 (2009)); see also Bell Atl. Corp. v. Twombly, 
    550 U.S. 11
      Regional-circuit law applies to this issue. Intell.
    Ventures I LLC v. Erie Indemnity Co., 
    850 F.3d 1315
    , 1325
    (Fed. Cir. 2017).
    Case: 21-1154      Document: 50     Page: 24    Filed: 11/05/2021
    24        CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.
    544, 570 (2007). “Plausibility means ‘more than a sheer
    possibility that a defendant has acted unlawfully.’” Tatis,
    882 F.3d at 426 (quoting Iqbal, 
    556 U.S. at 678
    ). “A claim
    has facial plausibility when the plaintiff pleads factual con-
    tent that allows the court to draw the reasonable inference
    that the defendant is liable for the misconduct alleged.” Iq-
    bal, 
    556 U.S. at 678
    . At bottom, the pleading standard
    “does not unlock the doors of discovery for a plaintiff armed
    with nothing more than conclusions.” 
    Id. at 678
    –79. Ac-
    cordingly, we accept as true factual allegations in the plain-
    tiff’s complaint and all reasonable inferences that can be
    drawn from them, and we construe them in the light most
    favorable to the nonmovant. Tatis, 882 F.3d at 426. That
    said, we “disregard rote recitals of the elements of a cause
    of action, legal conclusions, and mere conclusory state-
    ments.” James v. City of Wilkes-Barre, 
    700 F.3d 675
    , 679
    (3d Cir. 2012). “[A] document integral to or explicitly relied
    upon in the complaint may be considered without convert-
    ing the motion to dismiss into one for summary judgment.”
    In re Burlington Coat Factory Sec. Litig., 
    114 F.3d 1410
    ,
    1426 (3d Cir. 1997) (cleaned up).
    As an initial matter, it is undisputed that MPI, not
    Mylan N.V., was the entity that signed and physically sub-
    mitted the ANDA. 12 The question, then, is whether
    Celgene pled sufficient facts that either (1) Mylan N.V. was
    actively involved in and directly benefited from the ANDA
    (including in the agent–principal sense) or (2) MPI acted as
    12 Celgene argues that the district court erroneously
    made formal signatory status dispositive. We disagree.
    The district court simply noted that Mylan N.V. hadn’t
    signed the ANDA, as evidenced by the documents that
    Celgene itself included with the complaint. J.A. 80. Ac-
    cordingly, Celgene cannot argue that Mylan N.V. filed the
    ANDA, despite its broad allegation that the Mylan defend-
    ants collectively “filed” the ANDA. J.A. 79–80.
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    CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.       25
    Mylan N.V.’s alter ego in derogation of the corporate form.
    Celgene’s pleadings fail under either theory.
    Celgene alleged that MPI was wholly owned by Mylan
    Inc., and Mylan Inc. by Mylan N.V. J.A. 116–17 ¶¶ 6–7,
    3057 ¶¶ 23–24. This chain of ownership alone, however, is
    insufficient to state a claim against Mylan N.V. based on
    MPI’s ANDA submission. See Pearson, 
    247 F.3d at 484
    (“[M]ere ownership of a subsidiary does not justify the im-
    position of liability on the parent.”). And Celgene’s remain-
    ing relevant allegations are, as the district court observed,
    too conclusory. Celgene alleged that the defendants “work
    in concert with respect to the regulatory approval, manu-
    facturing, marketing, sale, and distribution of generic
    pharmaceutical products.” J.A. 120 ¶ 23 (present-case
    complaint), 3069 ¶ 76 (first-case complaint). It alleged that
    MPI “acts at the direction, and for the benefit, of Mylan
    N.V. and Mylan Inc., and is controlled and/or dominated by
    Mylan N.V. and Mylan Inc.” J.A. 120 ¶ 24, 3069 ¶ 77. It
    alleged that unspecified “members of the Mylan corporate
    family” are “alter egos” of Mylan N.V. J.A. 121 ¶ 25. It also
    alleged that MPI was an “alter ego[]” of Mylan N.V.
    J.A. 119 ¶ 18. And it alleged that “Mylan” (defined collec-
    tively to include all three defendants) “filed Mylan’s
    ANDA” at issue. J.A. 115–16 ¶ 1, 121–22 ¶ 30; see also
    J.A. 3074 ¶ 98. It also included with its complaint docu-
    ments from the ANDA in question, which were filed and
    signed by MPI.
    That just isn’t enough. At most, Celgene’s allegations
    amount to legal conclusions as to the defendants as a
    group—not to facts showing a plausible inference of liabil-
    ity as to Mylan N.V. For instance, nothing in the complaint
    suggests how Mylan N.V. is involved in the ANDA process,
    how it bypassed the corporate form to make MPI its alter
    ego, or the like.
    Celgene points to the Rosuvastatin line of cases and ar-
    gues both that signatory status does not matter and that
    Case: 21-1154    Document: 50     Page: 26    Filed: 11/05/2021
    26    CELGENE CORPORATION    v. MYLAN PHARMACEUTICALS INC.
    its allegations that Mylan N.V. will benefit should be
    enough. We disagree. As an initial matter, Celgene grossly
    overreads Rosuvastatin. See In re Rosuvastatin Calcium
    Pat. Litig., 
    703 F.3d 511
     (Fed. Cir. 2012). That case did not
    hold a non-signer liable or provide that benefiting from the
    ANDA was enough to be deemed to have “submitted” it.
    Instead, the entity that signed the ANDA sought to escape
    liability because it claimed that it was only filing the ANDA
    as the agent of a Canadian company. 
    Id. at 527
    . And there,
    the entity in question not only signed the ANDA but was
    found to have participated in its preparation and repre-
    sented that it would sell the product. 
    Id. at 529
    . Accord-
    ingly, Rosuvastatin held that an entity that is actively
    involved in filing the ANDA and stands to benefit from its
    approval is a “submitter”—not that benefiting from it is
    enough alone. Against the backdrop of the ANDA itself—
    which names only MPI—Celgene provides no nonconclu-
    sory allegations that Mylan N.V. was actively involved in
    and would benefit from the ANDA’s submission. Instead,
    it offers only “unadorned supposition” that the defendants
    “work in concert,” see J.A. 79, and allegations that Mylan
    N.V. “filed” the ANDA that are contradicted by the ANDA
    itself.
    Celgene further suggests that its allegations that
    Mylan N.V. directs and controls MPI (or that MPI is Mylan
    N.V.’s alter ego) should be enough, especially in view of the
    Mylan corporate structure. On these conclusory pleadings,
    we are unconvinced. As the district court observed, the
    complaint doesn’t contain “specific facts with respect to
    how” this control occurs. J.A. 79; cf. Twombly, 550 U.S.
    at 556–57 (finding insufficient “conclusory allegation of
    agreement” and “bare assertion of conspiracy”). Again, the
    complaint in this case is too conclusory to establish a plau-
    sible claim of liability as to Mylan N.V. Were it otherwise,
    an allegation that one corporation filed an ANDA coupled
    with a bare assertion of cooperation or control by another
    Case: 21-1154    Document: 50      Page: 27    Filed: 11/05/2021
    CELGENE CORPORATION    v. MYLAN PHARMACEUTICALS INC.       27
    would open the door to discovery for the entire parent-sub-
    sidiary chain in any Hatch-Waxman case.
    Finally, Celgene points to Valeant, in which the court
    remanded for a district court to consider the sufficiency of
    seemingly similar allegations, rather than dismissing the
    case outright. But the district court in Valeant hadn’t de-
    cided the sufficiency of those allegations on the merits.
    There had been no adjudication at all on failure to state a
    claim. And so, rather than decide that issue, this court re-
    manded to the district court to consider the allegations’ suf-
    ficiency in the first instance, to resolve internally
    contradictory aspects of those allegations, and to consider
    whether leave to amend would be appropriate to clarify the
    confusion caused by those internally contradictory asser-
    tions. Valeant, 978 F.3d at 1384–85. Here, there has al-
    ready been an initial adjudication and the issue is ready for
    appellate review.
    We agree with the district court that Celgene did not
    state a claim against Mylan N.V.
    B
    At the district court, Celgene asked in the alternative
    for leave to amend to “add additional allegations regarding
    the interconnectedness of [the defendants], including with
    respect to their involvement in Mylan’s ANDA.” See
    J.A. 81 n.12. The district court denied Celgene’s request.
    We review the denial of leave to amend for abuse of dis-
    cretion. 13 Premier Comp Sols., LLC v. UPMC, 
    970 F.3d 316
    , 318–19 (3d Cir. 2020). “Ultimately, a motion to amend
    is committed to the ‘sound discretion of the district court.’”
    In re Allergan ERISA Litig., 
    975 F.3d 348
    , 356 n.13 (3d Cir.
    13  Regional-circuit law applies. See Simio, LLC v.
    FlexSim Software Prods., Inc., 
    983 F.3d 1353
    , 1358
    (Fed. Cir. 2020).
    Case: 21-1154      Document: 50     Page: 28    Filed: 11/05/2021
    28        CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.
    2020) (quoting Cureton v. NCAA, 
    252 F.3d 267
    , 272 (3d Cir.
    2001)).
    Ordinarily, Rule 15 of the Federal Rules of Civil Proce-
    dure sets a liberal standard that a court “should freely give
    leave” to amend “when justice so requires.” But once the
    district court’s scheduling-order deadline has passed,
    Rule 16(b)(4) kicks in and a party must first show good
    cause. Premier Comp Sols., 970 F.3d at 319. No good
    cause, no leave to amend.
    Celgene did not make its request in a way that was
    compliant with the district court’s local rules. The district
    court also observed that the relevant amendment deadline
    had long since expired. And it noted that Celgene had been
    on notice of Mylan N.V.’s challenge to the adequacy of its
    pleading since August 2017 when the original motion to
    dismiss was filed. 14 Yet Celgene had not offered any
    grounds that demonstrated good cause for modification of
    the deadline. It denied Celgene’s request.
    On appeal, Celgene does not argue that it demon-
    strated good cause at the district court. Instead, it mainly
    (and incorrectly) argues that the district court considered
    the wrong deadline and didn’t properly apply the Rule 15
    standard. Recall that this was the second of two similar
    cases, as we explained above. See supra Section I.B. And
    14 Celgene suggests that it wasn’t on notice of this in-
    sufficiency because the district court initially denied the
    motion to dismiss. Appellant’s Br. 27. But as to failure to
    state a claim, the district court simply didn’t reach that
    ground on the merits—having allowed the parties to pro-
    ceed on venue-related discovery instead. See Celgene Corp.
    v. Hetero Labs Ltd., No. 17-cv-3387, ECF No. 150, at 8
    (D.N.J. Mar. 2, 2018). It should have been no surprise that
    the ground was included when the defendants renewed
    their motion to dismiss.
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    CELGENE CORPORATION   v. MYLAN PHARMACEUTICALS INC.       29
    recall that the parties stipulated that the resolution of
    Rule 12 motions in the first case would govern this one. See
    id. Celgene now argues that the second case’s scheduling
    order (which had not expired when it made this leave-to-
    amend request in the first case) should apply. But the par-
    ties agreed that the resolution of the motion in the first
    case would govern this one. It would make little sense to
    apply the scheduling order in the second case when all the
    briefing occurred under the first case’s schedule (and, in-
    deed, the opinion that we’re reviewing was issued in the
    first case). We also note that Celgene did not argue at the
    district court that the second case’s scheduling order
    should apply—this argument is new on appeal. We con-
    clude that the district court applied the correct deadline.
    Celgene’s allegations in its complaint were conclusory
    and insufficient. It knew the basis for their deficiency for
    years, as the district court correctly concluded, yet made no
    attempt to amend them in a timely manner. Nor has
    Celgene argued on appeal that it showed good cause. In
    our view, then, the district court did not abuse its discre-
    tion in denying Celgene’s request for leave to amend its
    complaint.
    IV
    We have considered Celgene’s remaining arguments
    but find them unpersuasive. For the reasons we discussed,
    the district court’s judgment is affirmed.
    AFFIRMED