Amyndas Pharmaceuticals, S.A. v. Zealand Pharma A/S ( 2022 )


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  •           United States Court of Appeals
    For the First Circuit
    No. 21-1781
    AMYNDAS PHARMACEUTICALS, S.A. and AMYNDAS PHARMACEUTICALS, LLC,
    Plaintiffs, Appellants,
    v.
    ZEALAND PHARMA A/S and ZEALAND PHARMA U.S., INC.,
    Defendants, Appellees,
    ALEXION PHARMACEUTICALS, INC.,
    Defendant.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF MASSACHUSETTS
    [Hon. Leo T. Sorokin, U.S. District Judge]
    Before
    Barron, Chief Judge,
    Selya and Kayatta, Circuit Judges.
    Robert E. Counihan, with whom David K. Tellekson, Jessica M.
    Kaempf, Deena J. Greenberg Feit, Todd R. Gregorian, Fenwick & West
    LLP, Russell Beck, and Beck Reed Riden LLP were on brief, for
    appellants.
    Edwina Clarke, with whom Kevin P. Martin, Robert D. Carroll,
    Huiya Wu, Tiffany Mahmood, and Goodwin Procter LLP were on brief,
    for appellees.
    September 2, 2022
    SELYA, Circuit Judge.    When biotech firms engage in the
    entrepreneurial equivalent of musical chairs, one firm sometimes
    gets left out in the cold.   That is essentially what happened here
    — and it led to the litigation described below.
    The music began with serial decisions by plaintiffs
    Amyndas   Pharmaceuticals,     S.A.,    now     known   as   Amyndas
    Pharmaceuticals Single Member P.C., and Amyndas Pharmaceuticals,
    LLC (collectively, Amyndas), appellants here, to consider separate
    joint ventures with defendants Zealand Pharma A/S (Zealand Pharma)
    and Alexion Pharmaceuticals, Inc. (Alexion), respectively.    In the
    ensuing chorus of negotiations, Amyndas relied on confidential
    disclosure agreements (CDAs) to safeguard its trade secrets. After
    Amyndas shared that confidential information, though, neither of
    the joint ventures materialized.
    Even so, the band played on.        Zealand Pharma and its
    newly established affiliate, Zealand Pharma U.S., Inc. (Zealand
    US), announced a partnership with Alexion — a partnership that
    contemplated bringing to market a drug targeting the same part of
    the immune system on which Amyndas had been concentrating. Amyndas
    responded by suing for misappropriation of trade secrets and other
    confidential information.
    The district court dismissed Amyndas's claims against
    Zealand Pharma on the ground that the CDA between the parties
    required Amyndas to litigate those claims in Denmark.    See Amyndas
    - 3 -
    Pharms., S.A. v. Alexion Pharm., Inc., No. 20-12254, 
    2021 WL 4551433
    , at *7 (D. Mass. June 8, 2021).                  It then dismissed
    Amyndas's claims against Zealand US for failure to state a claim
    because the complaint's allegations were predominately against the
    Zealand entities, collectively, and thus "[we]re insufficient to
    put [the Zealand entities] on notice as to 'who did what to whom.'"
    Id. at *2.   Twenty-eight days later, Amyndas filed a motion for
    reconsideration   or,   in   the    alternative,       for    leave    to   amend,
    attaching a proposed amended complaint.         The district court denied
    both reconsideration and leave to amend.
    Amyndas   appealed       these    rulings.         Because   Amyndas's
    claims against Alexion remained pending in the district court, the
    district court entered a partial final judgment under Federal Rule
    of Civil Procedure 54(b) to enable immediate appellate review.
    Following briefing and oral argument, we now uphold the entry of
    a partial final judgment under Rule 54(b).              And having confirmed
    the existence of appellate jurisdiction, we affirm the dismissal
    of Amyndas's claims against Zealand Pharma, vacate the dismissal
    of Amyndas's claims against Zealand US, and remand to the district
    court for further proceedings consistent with this opinion.
    I
    We briefly rehearse the facts and travel of the case.
    In that account, we take as true all well-pleaded facts alleged in
    the proposed amended complaint, drawing all reasonable inferences
    - 4 -
    in the pleader's favor.   See Rodríguez-Reyes v. Molina-Rodríguez,
    
    711 F.3d 49
    , 52-53 (1st Cir. 2013); Panther Partners Inc. v. Ikanos
    Commc'ns, Inc., 
    681 F.3d 114
    , 119 (2d Cir. 2012).
    Amyndas consists of a Greek company and its American
    affiliate. It is a biotechnology firm that researches and develops
    therapeutics targeting a part of the immune system known as the
    complement system.    When the complement system malfunctions, it
    can cause the immune system to attack healthy tissue, either
    causing or exacerbating a wide variety of conditions.     One area of
    Amyndas's research deals with "complement inhibitors."
    Amyndas's research has yielded compstatin — a peptide
    that selectively inhibits the C3 protein (which plays a role in
    activating the complement system).      What is more, Amyndas also has
    developed a related peptide (AMY-101) targeting that protein for
    clinical use. Amyndas is the exclusive licensee of patents related
    to this work and has endeavored to develop therapies based on AMY-
    101 that target the C3 protein.          It owns trade secrets and
    confidential information related to this work.
    In March of 2015, Zealand Pharma, a Danish biotechnology
    firm, contacted Amyndas about a potential partnership for the
    development   of   complement-related    therapeutics.    Discussions
    ensued.   The next month, the two firms entered into a CDA regarding
    information-sharing "for the purposes of evaluating a possible
    business/ services relationship between the parties and their
    - 5 -
    respective    Affiliates."       Shortly       thereafter,   Amyndas   started
    giving   Zealand      Pharma    access     to     confidential     information
    (including confidential information about AMY-101).               In August of
    2016, the firms signed a second CDA — with added protections — for
    "the evaluation or formation of a possible business and/or services
    and/or collaborative relationship."
    Both        CDAs     contained        elaborate     confidentiality
    provisions.    The confidentiality provision of the second CDA is
    emblematic.      It    stated    that    the    recipient    of   confidential
    information:
    shall (a) make no use of any of the
    Confidential    Information    disclosed    by
    Discloser other than for the Purpose [of the
    evaluation or formation of a possible business
    and/or    services     and/or    collaborative
    relationship between the parties and their
    respective Affiliates], (b) not disclose such
    Confidential Information to third parties, and
    (c) take all reasonable precautions to prevent
    disclosure of such Confidential Information to
    third parties.
    The confidentiality provision further stated that the recipient of
    confidential information:
    may only provide the Confidential Information
    of Discloser to its Representatives and its
    Affiliates who (a) need it for the Purpose,
    (b) are informed of the confidential nature of
    the Confidential Information, and (c) are
    bound by obligations of confidentiality and
    non-use no less restrictive than those
    contained herein.
    - 6 -
    The second CDA also contained an explicit guarantee that Amyndas
    would     "own    all     the    Developed        Technology       incorporating,     or
    involving the use of, the Amyndas Base Technology."
    Both        CDAs     included       an    identical     "Governing      Law"
    provision.        This provision consisted of a choice-of-law clause
    stipulating that the CDAs would "be interpreted and governed by
    the laws of the country (applicable state) in which the defendant
    resides"    and    a     forum-selection          clause    stipulating      that   "any
    dispute arising out of th[e CDA] shall be settled in the first
    instance by the venue of the defendant."
    Following          the    execution      of   the   second   CDA,   Amyndas
    shared     more     proprietary            information      with    Zealand     Pharma.
    Meanwhile, Zealand Pharma began its own research program in late
    2016, also focused on complement therapeutics.                      It did not inform
    Amyndas of this initiative.                Although negotiations continued, the
    firms ultimately decided not to collaborate.                       On April 26, 2017,
    Amyndas    terminated          its    information-sharing          relationship     with
    Zealand Pharma.
    We fast-forward to August of 2018, at which time Zealand
    Pharma    formed    Zealand          US,   a   Delaware    corporation    having      its
    principal place of business in Boston, Massachusetts.                           Without
    Amyndas's knowledge or consent, Zealand Pharma filed two European
    patent    applications          in    2018.      Zealand    Pharma    then    filed    an
    international patent application in February of 2019, claiming
    - 7 -
    priority in the two earlier patent applications and designating
    the United States as one jurisdiction in which patent protection
    would be sought.
    On    September        6,    2019,    the   international     patent
    application     was   published,       thus   making   its   contents   publicly
    available for the first time.                 The application purported to
    describe "compstatin analogues that are capable of binding to C3
    protein and inhibiting complement activation."                The C3 protein —
    which is the target of AMY-101 — has been the focus of Amyndas's
    research for many years.           Perhaps more importantly, it was one
    subject of Amyndas's         information-sharing with          Zealand Pharma.
    Amyndas   alleges     that   it   shared      confidential    information   with
    Zealand Pharma under the CDAs — information about various features,
    profiles, and characteristics of AMY-101 as well as how it could
    be used to make next-generation compounds.
    At this juncture, it is useful to describe Alexion's
    role in this saga of alleged corporate intrigue.              In 2007, Alexion
    — an established player in the complement therapeutics field —
    brought to market Soliris, a complement inhibitor that targets the
    C5 protein (a protein in the complement system).              Soliris has been
    approved by the Food         and Drug Administration (FDA) for four
    indications and — until recently — Soliris was the only FDA-
    approved and clinically available complement-specific therapeutic
    on the market.        Alexion's patent on Soliris expires soon, and
    - 8 -
    Alexion is facing commercial pressure to bring new complement-
    based drugs to market.
    In   January   of   2018,    representatives    of   Alexion    and
    Amyndas met in San Francisco.              Following that meeting, Alexion
    expressed interest in forming a partnership with Amyndas.               The two
    companies signed a CDA limiting the use of exchanged confidential
    information to a singular purpose, namely, the "exploration of one
    or     more   potential      business      arrangements    and/or    potential
    arrangements of research, development, and commercialization of
    drug    candidates    relating     to     Amyndas'   complement    inhibitors."
    Alexion requested and received certain confidential information
    about Amyndas's complement therapeutic research, including details
    about Amyndas's intellectual property, planned clinical trials,
    platform, and collaboration network.
    Although Alexion and Amyndas continued to talk for some
    time, their partnership negotiations ran aground.              But through at
    least December of 2018, Alexion continued to receive confidential
    research updates from Amyndas.             Unbeknownst to Amyndas, Alexion
    and Zealand Pharma had been discussing a collaboration during the
    same time frame.      On March 20, 2019, those two firms issued a joint
    press release announcing a joint venture to develop complement
    therapeutics.        More    recently,     they   have   announced   that    they
    anticipate entering Phase I clinical trials with a complement
    inhibitor targeting the C3 protein in the complement system.
    - 9 -
    Amyndas came to suspect that Alexion and Zealand Pharma
    had misappropriated confidential information which Amyndas had
    shared pursuant to the CDAs.         The announced collaboration between
    Alexion and Zealand Pharma for drugs targeting the C3 protein
    heightened    these    suspicions.         Deeming   its   rights   infringed,
    Amyndas sued Zealand Pharma, Zealand US, and Alexion in the United
    States District Court for the District of Massachusetts.                      Its
    complaint alleged that the Zealand defendants breached the CDAs,
    misappropriated trade secrets and other confidential information,
    and conspired with Alexion to use those misappropriated materials
    in   producing        competing    complement        therapeutic        products.
    Specifically, the complaint alleged claims against the Zealand
    defendants for trade secret misappropriation, unfair competition,
    breach of contract, breach of the implied covenant of good faith
    and fair dealing, and unjust enrichment.             So, too, the complaint
    alleged claims against Alexion for trade secret misappropriation,
    tortious     interference     with     contractual         relations,      unfair
    competition, breach of contract, and unjust enrichment.                       The
    complaint then tied all the defendants together by asserting
    conspiracy claims.
    Alexion      answered     the    complaint,      but   the     Zealand
    defendants moved to dismiss.         On June 8, 2021, the district court
    dismissed Amyndas's claims against both Zealand defendants. See
    Amyndas, 
    2021 WL 4551433
    , at *7.           As to Zealand Pharma, the court
    - 10 -
    ruled that the forum-selection clause in the CDAs required that
    all claims against that defendant be brought in Denmark.              See id.
    at *4-6.     Looking to the plain meaning of the phrase "shall be
    settled in the first instance by the venue of the defendant," the
    court concluded that the "only plausible reading" of the forum-
    selection clause was that "adjudication of claims against a party
    defendant that arise out of the CDA must occur in the location of
    the party defendant."     Id. at *4.    As to Zealand US (which had not
    itself executed a CDA with Amyndas), the court ruled that the
    complaint failed to state a claim upon which relief could be
    granted.     See id. at *3.        The court noted that the complaint
    largely referred to "Zealand" as a single entity and did not make
    clear whether and how Zealand US was involved.          See id. at *2-3.
    And because Zealand US was not formed until August of 2018, the
    "claims stated against 'Zealand' as a combined entity [we]re not
    sufficient to put Defendants on notice as to which claims pertain
    to Zealand [US]."   Id. at *3.
    Twenty-eight      days      later,      Amyndas        moved    for
    reconsideration   or,   in   the    alternative,    leave    to    amend   the
    complaint.    In its proposed amended complaint, Amyndas carefully
    distinguished between the two Zealand entities and pleaded its
    claims against them as discrete counts.         Furthermore, the proposed
    amended complaint alleged additional facts supporting the claim
    that Zealand US was involved in the continuing exploitation of
    - 11 -
    Amyndas's trade secrets, including allegations that Zealand US
    bears ongoing responsibility for the Alexion partnership and is
    participating     in   efforts    to    obtain   regulatory    approval   for
    therapeutics derived from Amyndas's trade secrets.              The proposed
    amended complaint also alleged that Zealand US is a corporate alter
    ego of Zealand Pharma and that the two are operated as a single
    business.
    On August 27, 2021, the district court denied Amyndas's
    motion.      In   a    minute    order,    the   court    summarily   refused
    reconsideration and denied Amyndas's request to file an amended
    complaint. The court indicated that the proposed amended complaint
    would be futile — but undertook no analysis of any specific
    allegations against Zealand US.           Instead, it tersely stated that
    the "proposed additional factual allegations" did not "plausibly
    allege a basis to conclude either that the Court should disregard
    the Zealand defendants' separate legal identities, or that Amyndas
    has stated claims directly against Zealand US."
    Amyndas appealed.          In conjunction with its notice of
    appeal, Amyndas moved for entry of a partial final judgment.              See
    Fed. R. Civ. P. 54(b).      Zealand Pharma and Zealand US opposed the
    Rule 54(b) motion.        The district court overruled the Zealand
    defendants' objections and entered a partial final judgment, thus
    breathing life into the notice of appeal.                See Fed. R. App. P.
    - 12 -
    4(a)(2).     Briefing followed in due course, and we heard oral
    argument on June 8, 2022.
    II
    Mindful that a federal court must always ensure that its
    rulings rest on a solid jurisdictional plinth, see Charlesbank
    Equity Fund II v. Blinds To Go, Inc., 
    370 F.3d 151
    , 155-56 (1st
    Cir. 2004) ("When a colorable question exists, an appellate court
    has an unflagging obligation to inquire sua sponte into its own
    jurisdiction."),      we   start   by   considering        the    basis    for   our
    jurisdiction over this interlocutory appeal:              the district court's
    entry of partial final judgment under Rule 54(b).                         A federal
    appellate   court's    jurisdiction          over   an   appeal   is   ordinarily
    limited to "final decisions" of the district court.                       
    28 U.S.C. § 1291
    .     This   finality    principle        typically    requires      a   final
    disposition of all claims in an action that have been brought by
    or against all of the parties.           See Curtiss-Wright Corp. v. Gen.
    Elec. Co., 
    446 U.S. 1
    , 8 (1980); Quinn v. City of Boston, 
    325 F.3d 18
    , 26 (1st Cir. 2003); see also Sears, Roebuck & Co. v. Mackey,
    
    351 U.S. 427
    , 431-38 (1956).        But Federal Rule of Civil Procedure
    54(b) carves out an exception:               it permits a district court to
    issue a partial final judgment that is immediately appealable as
    to particular claims or parties when those claims or parties can
    be sufficiently separated from other claims or parties in the case.
    - 13 -
    Withal, the district court's authority in this respect
    is   narrowly    circumscribed.         Only    if    the      court    supportably
    determines both that its decision regarding a claim or party is
    sufficiently     final    and    that   "there       is   no    just    reason   for
    delay[ing]" an immediate appeal may it enter a partial final
    judgment under Rule 54(b).         See Fed. R. Civ. P. 54(b); see also
    Curtiss-Wright Corp., 
    446 U.S. at 7-8
    .
    There   is   good   reason   why        Rule      54(b)   is   narrowly
    circumscribed.       The rule is designed to balance the need for the
    timely adjudication of important issues that arise early in a case
    with   the    "long-settled      and    prudential          policy     against   the
    scattershot disposition of litigation."               Spiegel v. Trs. of Tufts
    Coll., 
    843 F.2d 38
    , 42 (1st Cir. 1988).              The entry of "[j]udgments
    under Rule 54(b) must be reserved for the unusual case in which
    the costs and risks of multiplying the number of proceedings and
    of overcrowding the appellate docket are outbalanced by pressing
    needs of the litigants for an early and separate judgment as to
    some claims or parties." 
    Id.
     (quoting Morrison-Knudsen Co. v.
    Archer, 
    655 F.2d 962
    , 965 (9th Cir. 1981) (Kennedy, J.)).
    The court below determined that this case fit within the
    confines of Rule 54(b).           It entered a partial final judgment
    dismissing Amyndas's claims against Zealand Pharma and dismissing
    Amyndas's claims against Zealand US. At the same time, it retained
    jurisdiction over Amyndas's claims against Alexion but stayed
    - 14 -
    further    proceedings     pending      the     disposition     of   Amyndas's
    anticipated appeal.
    The Zealand defendants contend that the court erred in
    entering the partial final judgment.               We review the district
    court's legal determination regarding finality de novo.                     See
    González Figueroa v. J.C. Penney P.R., Inc., 
    568 F.3d 313
    , 317
    (1st Cir. 2009).    But we review the district court's determination
    that there is no just reason to delay the entry of judgment on the
    dismissal of the claims against the Zealand defendants for abuse
    of discretion.     See 
    id.
    The finality requirement is satisfied as long as the
    "trial court action underlying the judgment disposed of all the
    rights and liabilities of at least one party as to at least one
    claim."    Credit Francais Int'l, S.A. v. Bio-Vita, Ltd., 
    78 F.3d 698
    , 706 (1st Cir. 1996); see Curtiss-Wright, 
    446 U.S. at 7
    .              Here,
    it is undisputed that the dismissal of Amyndas's claims against
    the Zealand defendants satisfies this standard.                Moreover, that
    order is unarguably final.          See Credit Francais, 
    78 F.3d at 706
    .
    The burden of our inquiry thus falls on whether there is any "just
    reason for delay."     Fed. R. Civ. P. 54(b).
    In   mounting     this    inquiry,    we   must    "scrutinize   the
    district    court's      evaluation      of      such    factors     as     the
    interrelationship of the claims so as to prevent piecemeal appeals
    in cases which should be reviewed only as single units."              Curtiss-
    - 15 -
    Wright, 
    446 U.S. at 10
    .      For this purpose, the district court acts
    as a "dispatcher," determining which final decisions should await
    appeal in the ordinary course and which should be permitted to go
    forward immediately.        See 
    id. at 8
    .            If the district court
    considers the appropriate factors and adequately explains its
    reasoning, its determination is given "substantial deference."
    See Spiegel, 
    843 F.2d at 44
     (quoting Pahlavi v. Palandjian, 
    744 F.2d 902
    , 904 n.5 (1st Cir. 1984)).         After all, the district court
    has a more intimate familiarity with the case, the parties, and
    the interrelationships among the claims.
    The Zealand defendants submit that the district court
    undervalued the cost of piecemeal litigation and did not take
    proper account of Amyndas's ability to               pursue its claims in
    Denmark.     Such considerations, however, are outweighed by the
    desirability of a single trial in a single forum — and we think
    that   it   was   well   within   the   ambit   of    the   district   court's
    discretion to facilitate an interlocutory appeal designed to test
    these waters.
    Here, moreover, the issues on appeal are ripe for review
    and distinct from the merits of the claims remaining against
    Alexion.    An immediate resolution of those issues will determine
    whether a joint trial is feasible.
    Of course, even when concerns about piecemeal litigation
    are at a minimum because there is little risk of competing and
    - 16 -
    overlapping judgments on merits issues — as is the case here — a
    party seeking entry of partial final judgment must establish a
    compelling reason for accelerated appellate review.                  See id. at
    45-46.   For instance, the party may show a "pressing, exceptional
    need for immediate appellate intervention, or grave injustice of
    the   sort   remediable    only   by   allowing    an    appeal    to   be   taken
    forthwith, or dire hardship of a unique kind."              Id.     The district
    court concluded that Amyndas had satisfied this requirement, and
    we think that this determination was comfortably within the court's
    discretion.     Although Amyndas can pursue litigation against the
    Zealand defendants (or at least against Zealand Pharma) in Denmark,
    it would be shortsighted to underestimate the added expense,
    inconvenience, and other disadvantages of following that path.                  If
    the forum-selection clause does not require resort to that venue,
    the parties ought to know that fact sooner rather than later.
    Where, as here, the appropriate forum is in legitimate dispute and
    the   consequences    of    forum      selection   are    substantial,       that
    circumstance weighs heavily in favor of accelerated review.                    Cf.
    Fed. Home Loan Bank of Bos. v. Moody's Corp., 
    821 F.3d 102
    , 107
    n.3 (1st Cir. 2016) (approving partial final judgment aimed at
    allowing case to proceed in "appropriate venue").                 And the nature
    of the rights at issue here — intellectual property rights that
    may erode in significance over time — also factors in favor of
    speedier review.     Given this medley of factors, we find no abuse
    - 17 -
    of discretion in the district court's determination that there was
    no just reason for delay in entering a partial final judgment.
    Because the Rule 54(b) judgment covers all of the claims brought
    against the Zealand defendants, because the judgment as to those
    claims    is    final,       and   because    the       district   court   supportably
    determined that there was no just reason to delay the entry of
    that judgment, we have jurisdiction to hear and determine this
    appeal.
    III
    We divide our analysis of the appealed rulings into two
    movements.          First, we address the district court's dismissal of
    Amyndas's claims against Zealand Pharma by reason of the forum-
    selection clause.          Second, we address the district court's denial
    of Amyndas's motion for leave to file an amended complaint against
    Zealand US.         We then recapitulate our conclusions.
    A
    We    begin     with    the    district       court's    dismissal    of
    Amyndas's claims against Zealand Pharma.                   That dismissal was based
    upon the identical forum-selection clauses contained in the two
    CDAs.
    As    an   initial     matter,      we    note   that   Zealand   Pharma
    properly raised the forum-selection issue.                      The Supreme Court has
    indicated that "the appropriate way to enforce a forum-selection
    clause pointing to a state or foreign forum is through the doctrine
    - 18 -
    of forum non conveniens."           Atl. Marine Constr. Co. v. U.S. Dist.
    Ct. for W. Dist. of Tex., 
    571 U.S. 49
    , 60 (2013) (emphasis in
    original).         Even so, the Atlantic Marine Court left the door open
    for considering forum-selection arguments under the aegis of Rule
    12(b)(6).        See 
    id.
     at 61 & n.4.   This court has typically analyzed
    forum-selection clauses under that framework.            See, e.g., Rivera
    v. Kress Stores of P.R., Inc., 
    30 F.4th 98
    , 102 (1st Cir. 2022);
    Claudio-de León v. Sistema Universitario Ana G. Méndez, 
    775 F.3d 41
    , 46 & n.3 (1st Cir. 2014).               The arguments posed by Zealand
    Pharma fit within these contours.
    Against this backdrop, we train the lens of our inquiry
    upon       the    forum-selection    clause.      We   first   discuss   the
    interpretation of that clause and then discuss its enforceability.
    1
    We review de novo an order of dismissal under Rule
    12(b)(6).        See Silva v. Encycl. Britannica Inc., 
    239 F.3d 385
    , 387
    (1st Cir. 2001).         As we have said, both CDAs between Amyndas and
    Zealand Pharma contained the same forum-selection provision1:
    Governing Law. For any claim brought against
    a party under this Agreement, the Agreement
    will be interpreted and governed by the laws
    of the country (applicable state) in which the
    defendant resides. If an amicable settlement
    cannot be reached, any dispute arising out of
    this Agreement shall be settled in the first
    instance by the venue of the defendant.
    Given the identicality of the two forum-selection clauses,
    1
    we treat the two forum-selection clauses as one.
    - 19 -
    (second emphasis supplied).     The district court concluded that
    "the only plausible reading of the forum selection clause . . . is
    that adjudication of claims against a party defendant that arise
    out of the CDA must occur in the location of the party defendant."
    Amyndas, 
    2021 WL 4551433
    , at *4.      It further concluded that the
    "location" of Zealand Pharma was Denmark.         See id. at *4-5.
    Inasmuch as all of Amyndas's claims against Zealand Pharma arose
    out of the CDAs, those claims had to "be litigated in Denmark."
    Id. at *4.
    Before we reach the dispositive issue, two preliminary
    matters demand our attention.     First, we think it important to
    remark that neither party quarrels with the district court's
    conclusion that Amyndas's claims against Zealand Pharma "aris[e]
    out of" the CDAs.    Second, we also think it important to remark
    that the parties agree that the forum-selection clause in this
    case is mandatory.    In other words, the clause specifies a forum
    in which claims must be brought (unless enforcement of the clause
    is either waived or impermissible).     See Rivera, 30 F.4th at 103;
    Huffington v. T.C. Group, LLC, 
    637 F.3d 18
    , 21 (1st Cir. 2011).
    Where, as here, a federal court is asked to enforce a
    forum-selection clause, federal common law supplies the rules of
    decision.    See Rivera, 30 F.4th at 102-03; Lambert v. Kysar, 
    983 F.2d 1110
    , 1116 (1st Cir. 1993).    Notwithstanding the choice-of-
    law clause contained in each CDA, the parties have agreed that
    - 20 -
    federal common law and general contract-law principles control
    here.
    Under federal common law, a contract must be "read in
    accordance with its express terms and the plain meaning thereof."
    C. Sanchez & Son, Inc. v. United States, 
    6 F.3d 1539
    , 1543 (Fed.
    Cir. 1993).     The contractual terms are accorded "their ordinary
    meaning unless the parties mutually intended and agreed to an
    alternative meaning."        Harris v. Dep't of Veterans Affairs, 
    142 F.3d 1463
    , 1467 (Fed. Cir. 1998); see Forcier v. Metro. Life Ins.
    Co., 
    469 F.3d 178
    , 185 (1st Cir. 2006) (noting that federal common
    law "requires that we accord [a contract's] unambiguous language
    its plain and ordinary meaning"); Smart v. Gillette Co. Long-Term
    Disab. Plan, 
    70 F.3d 173
    , 178 (1st Cir. 1995) (explaining that
    federal common law demands the application of "common-sense canons
    of contract interpretation").          Even so, an inquiring court must
    avoid tunnel vision:       instead of focusing myopically on individual
    words, it must consider contractual provisions within the context
    of the contract as a whole.      See Rivera v. Centro Médico de Turabo,
    Inc., 
    575 F.3d 10
    , 17 (1st Cir. 2009); Smart, 
    70 F.3d at 179
    .
    Given   the   parties'    consensus   on   these   points,   the
    interpretive question before us boils down to the meaning of the
    term "the venue of the defendant."        Amyndas argues that "the venue
    of the defendant" denotes multiple locations as applied to Zealand
    Pharma   —    including    locations    where   Zealand   Pharma   and    its
    - 21 -
    affiliates    have    a   presence      (including      both    Denmark     and
    Massachusetts).      We   do   not    believe   that   "the    venue   of   the
    defendant" is susceptible to so elastic an interpretation.
    "Venue" is a term that — in legal matters — has both a
    general meaning and a more specialized meaning.            Amyndas contends
    that the meaning of "venue" in the forum-selection clause should
    closely track its specialized legal meaning.             In particular, it
    draws sustenance from the federal venue statute, see 
    28 U.S.C. § 1391
    , which defines venue to include not only the place or places
    where a defendant resides (which — for corporations — can include
    multiple locations) but also the place or places where events or
    omissions giving rise to the claim occurred, see 
    id.
     § 1391(b)-
    (d).   Such a construction would inevitably lead to the conclusion
    that Zealand Pharma potentially could be sued in virtually any
    jurisdiction.     But such a conclusion would undercut the certainty
    that forum-selection clauses are meant to confer and would render
    the clause largely superfluous.           See M/S Bremen v. Zapata Off-
    Shore Co., 
    407 U.S. 1
    , 13 n.15, 17 (1972).             So viewed, Amyndas's
    principal argument lacks force.
    Nor does Amyndas's effort to tether Zealand Pharma to
    Zealand US gain Amyndas any traction with respect to its principal
    argument.     After all, the two are separate corporations, and
    Zealand US did not exist when the CDAs were executed.             Given that
    factual backdrop, we cannot credit Amyndas's argument that the
    - 22 -
    parties, as "sophisticated" entities, used the term "the venue of
    the defendant" to signify virtually any location.
    Amyndas tries a variation on this theme — a variation
    that     also    relies     heavily    on   treating       Zealand   Pharma    as
    substantially equivalent to Zealand US.               It suggests that even if
    "the venue of the defendant" is accorded the narrower but still
    widely    shared     meaning   of   "locale"    or    "location,"    see,   e.g.,
    Merriam-Webster                                                      Dictionary,
    https://www.merriam-webster.com/dictionary/venue                      (defining
    "venue"         as     "locale");        Oxford        English       Dictionary,
    https://www.oed.com/view/Entry/222318              (defining      "venue"     with
    various sense of place, scene, and location), Zealand Pharma
    operates in multiple locales.           Amyndas points to facts suggesting
    that Zealand Pharma operates hand-in-glove with Zealand US and
    argues that the locations of Zealand US's offices in Massachusetts
    and New York qualify as residences of Zealand Pharma.
    But      this   argument    ignores      the   distinction   between
    Zealand Pharma and Zealand US.           The forum-selection clause points
    unerringly to Zealand Pharma, not to Zealand US.                 Only the latter
    has a residence in the United States.             This interpretation has the
    unparalleled benefit of being consistent with other aspects of the
    CDAs.    See PowerShare, Inc. v. Syntel, Inc., 
    597 F.3d 10
    , 17 (1st
    Cir. 2010) (explaining that "one of the cardinal rules of contract
    interpretation" is "that a document should be read to . . . render
    - 23 -
    [all   its    provisions]     consistent        with   each    other"    (quoting
    Mastrobuono v. Shearson Lehman Hutton, Inc., 
    514 U.S. 52
    , 63
    (1995))).      Take the choice-of-law clause, for instance.                     That
    clause sets the governing law as that of "the country (applicable
    state) in which the defendant resides."            At the time the CDAs were
    signed, Zealand Pharma's residence could only have been Denmark.
    Thus, as applied to Zealand Pharma, "the country . . . in which
    [it] resides" could only have been understood to mean that singular
    location.
    For this reason, we reject Amyndas's argument that the
    parties'     use   of   the   phrase    "the    country . . . in        which    the
    defendant     resides"    shows   that     they   knew   how    to   select     the
    defendant's place of residence when they intended to do so.                     See,
    e.g., Vendura v. Boxer, 
    845 F.3d 477
    , 485 (1st Cir. 2017).                  Given
    Zealand Pharma's singular location at the times the CDAs were
    signed, we think it is more consistent with those agreements as a
    whole to interpret "the venue of the defendant" similarly to
    "country . . . in which the defendant resides."                 Simply stated,
    both "venue" and "residence" point to Denmark because that is
    Zealand Pharma's lone location.
    We are not convinced of any contrary conclusion by
    Amyndas's argument regarding the parties' use of the definite
    article "the" before "venue" in the forum-selection clause. "[T]he
    definite article 'the' 'particularizes the subject spoken of,'
    - 24 -
    suggesting . . . refer[ence] to a single object."     Hernandez v.
    Williams, Zinman & Parham PC, 
    829 F.3d 1068
    , 1074 (9th Cir. 2016)
    (quoting Black's Law Dictionary 1647 (4th ed. 1968)).      Just as
    "the house" means that there is one house, so too "the venue," in
    this context, could mean that there is one venue.
    To be sure, the force of "the" and the singular form
    depend on context and use.   Amyndas points to the Dictionary Act,
    which provides that — so far as the construction of federal
    statutes is concerned — "words importing the singular include and
    apply to several persons, parties, or things."       
    1 U.S.C. § 1
    .
    Relatedly, Amyndas notes that the federal venue statute, 
    28 U.S.C. § 1391
    , uses "the venue" even though "no single such location
    exists."
    Assuming without deciding that Amyndas is correct that
    "the" could refer to multiple locations, that does not change the
    outcome of this case.   That is because — as we already have stated
    — Zealand Pharma has had only one residence at all relevant times:
    Denmark.   Consequently, it would be struthious to suggest that
    "the venue" of Zealand Pharma carried a plural meaning.
    And in addition, our reading of the agreement accords
    with the core purpose of a mandatory forum-selection clause:    to
    restrict the fora in which covered controversies may be resolved.
    That purpose was adequately evinced in this case, as the forum-
    selection clause was a "reasonable effort to bring vital certainty
    - 25 -
    to this international transaction."     M/S Bremen, 
    407 U.S. at 17
    .
    The interest in creating certainty would be poorly served by
    construing "the venue of the defendant," as used in the CDAs, as
    referring to virtually anywhere.        A mandatory forum-selection
    clause that permits suit to be brought virtually anywhere is not
    a mandatory forum-selection clause at all.
    To say more on this point would be supererogatory.
    Considering the text, context, and function of the forum-selection
    clause, we agree with the district court that the forum-selection
    clause must be interpreted to require that the claims against
    Zealand Pharma be brought first in a Danish court.
    2
    Amyndas argues that even if the forum-selection clause
    requires — by textual interpretation — litigating its claims
    against Zealand Pharma in Denmark, it would be unreasonable to
    enforce that clause    as written.      The premise   that underpins
    Amyndas's argument is sound:   even if a forum-selection clause is
    mandatory and unambiguous — as this one is — a court may decline
    to enforce it if the resisting party can show that doing so would
    be "unreasonable."    See M/S Bremen, 
    407 U.S. at 10
    ; Claudio-De
    León, 775 F.3d at 48-49.   Absent such a showing, a forum-selection
    clause is presumptively enforceable.      See Claudio-De León, 775
    F.3d at 48.
    - 26 -
    We have articulated four grounds for deeming a forum-
    selection clause to be unenforceable:          the clause derives from
    "fraud   or   overreaching";      enforcing    the   clause    "would    be
    unreasonable and unjust"; "proceedings in the contractual forum
    will be so gravely difficult and inconvenient that the party
    challenging the clause will for all practical purposes be deprived
    of his day in court"; and enforcing the clause would "contravene
    a strong public policy of the forum in which suit is brought,
    whether declared by statute or by judicial decision."           Id. at 48-
    49 (internal quotation marks omitted); see M/S Bremen, 
    407 U.S. at 15
    .   In addition, public interest factors under the doctrine of
    forum non conveniens may sometimes provide support for rejecting
    enforcement of an otherwise valid forum-selection clause, but
    "those factors will rarely defeat" such a clause.             Atl. Marine,
    571 U.S. at 64; see Imamura v. Gen. Elec. Co., 
    957 F.3d 98
    , 107
    (1st Cir. 2020) (noting that public interest factors include "the
    administrative difficulties flowing from court congestion; the
    'local   interest   in   having   localized   controversies    decided   at
    home'; the interest in having the trial of a diversity case in a
    forum that is at home with the law that must govern the action;
    the avoidance of unnecessary problems in conflict of laws, or in
    the application of foreign law; and the unfairness of burdening
    citizens in an unrelated forum with jury duty" (quoting Piper
    Aircraft Co. v. Reyno, 
    454 U.S. 235
    , 241 n.6 (1981))).
    - 27 -
    Amyndas does not argue that the forum-selection clause
    is somehow tainted by fraud or overreaching.              Instead, Amyndas
    strives to persuade us that forcing it to litigate in Denmark would
    be unreasonable and would effectively deprive it of its day in
    court.    Specifically, it says that Denmark has more restrictive
    trade secret protections and imposes limitations on discovery not
    imposed   by   American    courts,      such   as   restrictions   on   the
    availability of internal corporate documents.
    We are not persuaded.        A showing that a litigant would
    be so inconvenienced by litigating in a designated forum that a
    forum-selection clause should be disregarded is a heavy lift.           See
    In re Mercurio, 
    402 F.3d 62
    , 66 (1st Cir. 2005); cf. Piper
    Aircraft, 454 U.S. at 246-55 (holding that potential change in law
    cannot, by itself, fend off dismissal under forum non conveniens
    absent    showing   that   new    law     is   "clearly    inadequate    or
    unsatisfactory").   Amyndas has not come close to making that heavy
    lift in this instance.
    When the CDAs were first negotiated and signed, Zealand
    Pharma was based in Denmark and Zealand US did not exist.          It would
    have been obvious to Amyndas at that time that if it wound up suing
    Zealand Pharma, it would be obliged to do so in Denmark, using
    whatever trade secret protections and discovery procedures were
    available under Danish law.      Put bluntly, the content and contours
    of Danish trade secret      law and       the potential limitations      on
    - 28 -
    discovery were clearly foreseeable to Amyndas from the start.               See
    Atl. Marine, 571 U.S. at 64; M/S Bremen, 
    407 U.S. at 17-18
    .                 Had
    Amyndas — a sophisticated party acting with the advice of learned
    counsel — been wary of litigating under those rules, it could have
    negotiated for a different forum or choice of law.                That Amyndas
    may now be suffering buyer's remorse about the forum to which it
    agreed is not a sufficient reason for denying enforcement of a
    valid forum-selection clause.        See Dayhoff Inc. v. H.J. Heinz Co.,
    
    86 F.3d 1287
    , 1298 (3d Cir. 1996).
    Nor can Amyndas credibly claim that it is being denied
    its day in court.      Foreign courts frequently have more limited
    discovery or stricter evidentiary regimes than federal courts, but
    that is rarely a basis for concluding that a party would be denied
    its day in court.     See, e.g., Robinson v. TCI/US W. Commc'ns Inc.,
    
    117 F.3d 900
    , 909 (5th Cir. 1997) (holding that more limited
    discovery available under English law does not bar application of
    forum   non    conveniens         dismissal);      see    also     Gilmer       v.
    Interstate/Johnson Lane Corp., 
    500 U.S. 20
    , 31 (1991) (observing
    that the fact that discovery "procedures [in arbitration] might
    not be as extensive as in the federal courts" does not render
    agreement to arbitrate invalid).            Mere differences in procedures
    or limitations on remedies, unless they effectively deprive the
    complaining   party    of   any    remedy    at   all,   will    not   render   a
    designated forum unreasonable. See Iragorri v. Int'l Elevator,
    - 29 -
    Inc., 
    203 F.3d 8
    , 14 (1st Cir. 2000) (concluding that remedy
    limitations in Colombia did not render forum inadequate); see also
    Piper Aircraft, 454 U.S. at 255 (affirming forum non conveniens
    dismissal and holding that remedies available in Scottish courts
    were not "so clearly inadequate or unsatisfactory" that they were
    "no remedy at all").    So it is here:     although litigating in
    Denmark may be inconvenient for Amyndas and may increase the cost
    of litigation, the record does not support its claim that it will
    be denied its day in court there.2
    Amyndas next contends that public policy requires that
    litigation proceed in the United States in order to prosecute its
    trade secrets claims. Although the Defend Trade Secrets Act (DTSA)
    guarantees a federal forum for trade secret theft claims, see 
    18 U.S.C. § 1836
    , Amyndas presents no evidence — and we can discern
    none in the record — that the DTSA was meant to supersede the
    forum-selection decisions of sophisticated parties.3    Amyndas is
    on solid ground in noting that the DTSA's text and legislative
    2 In point of fact, Amyndas began proceedings against Zealand
    Pharma in Denmark on January 10, 2022, and it has successfully
    obtained a stay of the contested patents from the European Patent
    Office.
    3 We add, moreover, that when the first CDA was signed in
    March of 2015, the DTSA had not yet been enacted. Although the
    second CDA was signed in August of 2016 (after the DTSA became
    effective in May of that year), it would be hard to believe — given
    the identical nature of the forum-selection clauses and the other
    similarities in the documents — that either of the parties
    structured their conduct around the existence of the DTSA.
    - 30 -
    history make pellucid that Congress was concerned with the theft
    of American trade secrets abroad and intended the DTSA to have
    extraterritorial reach.      See 
    18 U.S.C. § 1837
     (providing for
    extraterritorial applicability under certain circumstances); see,
    e.g., Pub L. 114-153, 130 Stat 376, 383-84 § 5 ("It is the sense
    of Congress that . . . (1) trade secret theft occurs in the United
    States and around the world; (2) trade secret theft, wherever it
    occurs, harms the companies that own the trade secrets and the
    employees of the companies"); S. Rep. No. 114-220 at 1-2, 11-12
    (2016); H. Rep. No. 114–529 at 3-4, 15-16 (2016).           But the bare
    fact that a law provides a federal cause of action with some
    extraterritorial   reach   does   not   prevent   private   parties   from
    contracting either outside it or around it.             Here, the mere
    existence of the DTSA — without any showing that the DTSA was
    linked to the parties' negotiations — does not inhibit a court's
    enforcement of the parties' forum-selection choices.          See, e.g.,
    Fintech Fund, F.L.P. v. Horne, 
    836 F. App'x 215
    , 227 (5th Cir.
    2020) (affirming dismissal of case involving DTSA claim based on
    forum-selection clause designating England as forum).
    The sockdolager, of course, is that — despite very
    general statements that the DTSA was intended to allow enforcement
    in federal court and that Congress was concerned by foreign trade
    secret theft — Amyndas has produced no compelling evidence that
    the forum-selection clause here "contravene[s] a strong public
    - 31 -
    policy."    M/S Bremen, 
    407 U.S. at 15
    ; see Rafael Rodríguez Barril,
    Inc. v. Conbraco Indus., Inc., 
    619 F.3d 90
    , 93-95 (1st Cir. 2010).
    Tellingly,    Amyndas       has   identified      no   case    in     which    a    court
    concluded that the DTSA has been construed to trump a valid forum-
    selection clause.       We decline to blaze a new trail through this
    uncharted terrain.
    Amyndas     next      contends      that   the    public    interest      in
    judicial economy warrants keeping all parties in the district court
    action because it would be inefficient and, thus, unreasonable to
    require    Amyndas     to    litigate      in    Denmark      while    allowing      its
    litigation against Alexion (and, possibly, Zealand US) to proceed
    in the district court.            But Amyndas's private inconveniences in
    litigating its claims in Denmark were wholly foreseeable at the
    time Amyndas signed the CDAs and, thus, its private inconveniences
    bear no weight.       See Atl. Marine, 571 U.S. at 64.                  To cinch the
    matter, public interest factors will rarely tip the balance:
    "forum-selection clauses should control except in unusual cases."
    Id.   This is not so rare a case.
    Assuming without deciding that judicial economy concerns
    may, under special circumstances, override a mandatory forum-
    selection    clause,    Amyndas      has     failed    to    show     that    any    such
    sufficiently compelling circumstances are present here.                       Virtually
    all of the cases that Amyndas cites in support of this argument
    - 32 -
    involve section 1404 transfer requests4 and/or predate Atlantic
    Marine's injunction that "forum-selection clauses should control
    except in unusual cases."    Id.       We see no principled basis for
    accepting Amyndas's invitation to keep Zealand Pharma in the
    district court action in the interest of judicial economy.
    We do not gainsay that Amyndas may now regret negotiating
    a forum-selection provision that gives Zealand Pharma home-court
    advantage and a more favorable choice of law for the trade secret
    dispute that has arisen.   Those regrets may coalesce into a bitter
    lesson about looking at a nascent partnership through rose-colored
    glasses.   But they are not a sufficient reason for disregarding
    the plain text and manifest purpose of a valid forum-selection
    clause.
    That ends this aspect of the matter.      We conclude that
    the forum-selection clause is valid and enforceable.        Under its
    terms, Amyndas's claims against Zealand Pharma must be litigated
    in a Danish court.    Accordingly, we uphold the district court's
    dismissal of Amyndas's claims against Zealand Pharma.
    B
    This brings us to Amyndas's claims against Zealand US.
    The district court dismissed the claims contained in the original
    4 Section 1404 places a premium on considerations of judicial
    economy. See Cont'l Grain Co. v. The FBL-585, 
    364 U.S. 19
    , 26
    (1960).
    - 33 -
    complaint against Zealand US.               The court noted that the complaint
    largely referred to "Zealand" as a single entity and did not
    specify whether and how Zealand US was involved.                             See Amyndas,
    
    2021 WL 4551433
    , at *2-3.               Twenty-eight days later, Amyndas sought
    leave to amend.           Amyndas annexed to its motion a proposed amended
    complaint        pleading       its    claims    against   each       Zealand   defendant
    separately.           The district court denied leave to amend, and Amyndas
    appeals the denial with respect to its claims against Zealand US.5
    The     Civil    Rules    take    a   liberal     stance      toward    the
    amendment        of    pleadings,       consistent      with    the    federal    courts'
    longstanding policy favoring the resolution of disputes on the
    merits.         See Foman v. Davis, 
    371 U.S. 178
    , 182 (1962) ("If the
    underlying facts or circumstances relied upon by a plaintiff may
    be   a       proper    subject    of    relief,    he   ought     to    be   afforded    an
    opportunity to test his claim on the merits."). Rule 15(a) permits
    amendments with leave of court, which the court "should freely
    give . . . when justice so requires."                    Fed. R. Civ. P. 15(a)(2).
    "In the absence of any apparent or declared reason — such as undue
    delay, bad faith or dilatory motive on the part of the movant,
    repeated failure to cure deficiencies by amendments previously
    allowed, undue prejudice to the opposing party by virtue of
    In the alternative, Amyndas asked the district court to
    5
    reconsider the earlier order of dismissal.    For all practical
    purposes, though, the original complaint has dropped out of the
    case.
    - 34 -
    allowance of the amendment, futility of amendment, etc. — the leave
    sought should, as the rules require, be 'freely given.'" Foman,
    
    371 U.S. at 182
    ; see Palmer v. Champion Mortg., 
    465 F.3d 24
    , 30
    (1st Cir. 2006).
    A denial of leave to amend is reviewed for abuse of
    discretion. See Palmer, 
    465 F.3d at 30
    .                  A district court's
    "discretion is necessarily broad—but it is not absolute."               Indep.
    Oil & Chem. Workers of Quincy, Inc. v. Procter & Gamble Mfg. Co.,
    
    864 F.2d 927
    , 929 (1st Cir. 1988).            An "[a]buse occurs when a
    material factor deserving significant weight is ignored, when an
    improper factor is relied upon, or when all proper and no improper
    factors are assessed, but the court makes a serious mistake in
    weighing them."    
    Id.
    With respect to the claims against Zealand US, the
    district court's stated reasons for rejecting the proposed amended
    complaint and denying leave to amend fall into two recognizable
    buckets:    undue delay and futility.        As to undue delay, the court
    observed that "at no point in the course of the motion to dismiss
    process did Amyndas request . . . leave to amend its pleading" and
    "[i]nstead, it waited until nearly a month had elapsed following
    the   challenged   Order   before    it   first   made    such   a   request."
    Moreover, "the factual allegations Amyndas [sought] to add were
    publicly available prior to the hearing on the original motion to
    dismiss."   The allegations, the court stated, were "not 'new,' and
    - 35 -
    justice does not require that Amyndas be permitted to belatedly
    add them."
    As to futility, the court ruled — without dissecting the
    substance of any of the allegations in the proposed amended
    complaint — that "none of the additional factual allegations change
    the analysis . . . presented by the prior motion to dismiss."                 It
    concluded that "the proposed additional factual allegations" do
    not "plausibly allege a basis to conclude . . . that Amyndas has
    stated claims directly against Zealand US."             Thus, the court said,
    "Amyndas's request for leave to amend is futile."
    Amyndas challenges both of the district court's stated
    grounds on appeal.      We consider each ground in turn.
    1
    A motion for leave to file an amended complaint "requires
    that a court examine the totality of the circumstances and exercise
    sound discretion in light of the pertinent balance of equitable
    considerations."   Quaker State Oil Ref. Corp. v. Garrity Oil Co.,
    
    884 F.2d 1510
    , 1517 (1st Cir. 1989); see Palmer, 
    465 F.3d at
    30-
    31.   Although delay alone is not a sufficient basis for denying
    leave to amend, undue delay assuredly is.               See, e.g., Hagerty ex
    rel. United States v. Cyberonics, Inc., 
    844 F.3d 26
    , 34 (1st Cir.
    2016) (explaining that "undue delay, on its own, may be enough to
    justify denying a motion for leave to amend"); Hayes v. N. Eng.
    Millwork   Distribs.,    Inc.,   
    602 F.2d 15
    ,   19   (1st   Cir.   1979)
    - 36 -
    (similar).     When a party has allowed a "considerable period of
    time" to elapse, it must "show some 'valid reason for [its] neglect
    and delay.'"    Hayes, 
    602 F.2d at 19-20
    ; see In re Lombardo, 
    755 F.3d 1
    , 3 (1st Cir. 2014) (Souter, J.) ("[W]e have repeatedly said
    that when considerable time has elapsed . . . , the movant has [at
    the very least] the burden of showing some valid reason for his
    neglect and delay." (internal quotation marks omitted) (second
    alteration in original)); Calderón-Serra v. Wilmington Tr. Co.,
    
    715 F.3d 14
    , 20 (1st Cir. 2013) ("Appreciable delay alone, in the
    absence of good reason for it, is enough to justify denying a
    motion for leave to amend.").     Thus, for delay to be "undue," the
    period of delay must be both substantial and unjustified.
    Determining how long is too long depends on the facts
    and circumstances of each particular case.    This inquiry considers
    the reasonableness of the time between the filing of the motion
    for leave and a variety of points at which a party would become
    aware of a need to amend, such as the filing of a motion to dismiss,
    a dismissal order, or the discovery of new information          that
    substantially alters the substance or viability of the claims.
    See Hagerty, 844 F.3d at 34-35.     Ascertaining whether a delay is
    "undue" is not simply a matter of counting days but, rather,
    depends on the "totality of the circumstances" in the particular
    case.   Palmer, 
    465 F.3d at 31
    .
    - 37 -
    Of course, the reason offered for seeking leave to amend
    must be a "valid" one.   See, e.g., Lombardo, 755 F.3d at 3; Hayes,
    
    602 F.2d at 20
    .      Generally, valid reasons include a motion to
    dismiss or a ruling from the court pointing out flaws in the
    original pleading or the discovery of new information.      This is
    not a high hurdle, and the dispositive datum often will be the
    reasonableness of the pleader's actions.    But even if the reasons
    are valid, the court must consider whether and to what extent the
    opposing party would be unfairly prejudiced as a result of a
    delayed amendment.     See Zenith Radio Corp. v. Hazeltine Rsch.,
    Inc., 
    401 U.S. 321
    , 330-31 (1971); Villanueva v. United States,
    
    662 F.3d 124
    , 127 (1st Cir. 2011).
    In particular cases, other factors may weigh in the
    balance.   For instance, a court may consider whether a proposed
    amendment is a first attempt.     See City of Mia. Fire Fighters' &
    Police Officers' Ret. Tr. v. CVS Health Corp., __ F.4th __, __
    (1st Cir. 2022) [No. 21-1479, slip op. at 28] (affirming denial of
    leave to amend when plaintiffs sought "a third bite of the apple
    in the form of a second amended complaint"); Aponte-Torres v. Univ.
    of P.R., 
    445 F.3d 50
    , 58 (1st Cir. 2006).     Serial amendments may
    be given closer scrutiny in terms of timing because "busy trial
    courts, in the responsible exercise of their case management
    functions, may refuse to allow plaintiffs an endless number of
    trips to the well."    Aponte-Torres, 445 F.3d at 58.   So, too, the
    - 38 -
    existence of related litigation may be a factor in the decisional
    calculus.     See, e.g., Nikitine v. Wilmington Tr. Co., 
    715 F.3d 388
    , 389-91 (1st Cir. 2013).
    In the case at hand, Amyndas had a valid reason for
    moving to amend:        the district court had pointed out a fatal flaw
    in   its     original       complaint     (the   failure   to   differentiate
    sufficiently between Zealand Pharma and Zealand US with respect to
    liability for the claims asserted).              Although Amyndas moved for
    leave to amend only twenty-eight days after the district court
    dismissed its original complaint, the court found undue delay.
    The district court's finding of undue delay was based on two
    particular circumstances.           First, it faulted Amyndas for not
    requesting leave to amend during the motion-to-dismiss process,
    "even as an alternative."         Waiting four weeks after the dismissal
    order to request leave to amend, the court concluded, was simply
    too late.6    Second, the court concluded that many of the additional
    facts    added   in   the    proposed     amended   complaint   were   publicly
    available prior to the hearing on the motion to dismiss the
    6 Amyndas says that it did request leave to amend earlier in
    the process. In a footnote to its filings in opposition to the
    Zealand entities' motion to dismiss, it requested at a "minimum,
    or in the alternative, . . . early discovery regarding Zealand US
    to allow Plaintiffs the opportunity to amend their Complaint, if
    necessary." The general rule, however, is that a district court
    need not pay heed to a contingent request for leave to amend made
    only in opposition papers. See Fisher v. Kadant, Inc., 
    589 F.3d 505
    , 509 (1st Cir. 2009).
    - 39 -
    original   complaint    and,    thus,   were   not   "new."     Accordingly,
    "justice d[id] not require that Amyndas be permitted to belatedly
    add" its allegations.
    Although the timing of a request for leave to amend and
    the relative novelty of the added allegations contained in the
    proposed   amended     complaint    are   relevant    considerations,    the
    district court's reasoning does not pass muster.              Amyndas's delay
    in filing its motion for leave to amend fell well short of the
    timeframes that our cases have identified as undue and cannot,
    under all the circumstances, be characterized as substantial.             Nor
    does the record, fairly read, suggest that Amyndas was dilatory.
    Amyndas filed its original complaint in December of 2021, faced a
    motion to dismiss from the Zealand defendants in March of 2022,
    had a hearing on that motion in May, and received the decision in
    June.   It filed its motion for leave to amend a scant twenty-eight
    days later.
    The mere fact that Amyndas's motion for leave to amend
    came after the district court dismissed the original complaint is
    not sufficient to ground a conclusion that the motion was unduly
    delayed.   It is common ground that "[a]mendments may be permitted
    pre-judgment, even after a dismissal for failure to state a claim."
    Palmer, 
    465 F.3d at 30
    .        After all, the "when justice so requires"
    standard of Rule 15(a) puts a thumb on the scale in favor of
    allowing amendments in non-frivolous cases.            See Foman, 371 U.S.
    - 40 -
    at 182.     Amyndas moved to amend before the district court entered
    judgment and, thus, Rule 15's more liberal standards apply here.7
    Withal, we have understandably condemned "wait and see"
    amendment     practices:    a      plaintiff   may   not,   for   instance,
    "deliberately wait in the wings for a year and a half with another
    amendment to a complaint should the court hold the first amended
    complaint was insufficient." ACA Fin. Guar. Corp. v. Advest, Inc.,
    
    512 F.3d 46
    , 57 (1st Cir. 2008); see Kader v. Sarepta Therapeutics,
    Inc., 
    887 F.3d 48
    , 61 (1st Cir. 2018); Palmer, 
    465 F.3d at 30-31
    .
    But here, there is no reason to conclude that Amyndas engaged in
    any such "wait and see" practices.           Amyndas filed its motion to
    amend less than two months after the emergence of new evidence.
    And   the    amended   complaint     specifically    addressed    a   defect
    identified by the district court in its dismissal of the original
    complaint:     Amyndas's failure to differentiate sufficiently its
    claims between Zealand Pharma and Zealand US.           See Amyndas, 
    2021 WL 4551433
    , at *2-3.
    Although it is true that the Zealand defendants moved to
    dismiss based, in part, on that same defect, a relatively short
    period of time ensued between the date when Zealand's motion put
    7 These standards contrast with the somewhat stricter
    standards governing post-judgment motions to amend.      See CVS
    Health, __ F.4th at __ [No. 21-1479, slip op. at 29] (emphasizing
    that plaintiffs sought leave to amend after judgment had entered
    so "Rule 15 was no longer on the table").
    - 41 -
    Amyndas on notice of the defect and the date when Amyndas moved to
    amend.     The length of the delay is, of course, a critical data
    point in determining whether a period of delay is "undue."     See,
    e.g., Hagerty, 844 F.3d at 35 (denying motion to amend in face of
    year-long delay); Feliciano-Hernández v. Pereira-Castillo, 
    663 F.3d 527
    , 538 (1st Cir. 2011) (denying motion to amend in face of
    gap of "nearly a year"); Advest, 
    512 F.3d at 57
     (faulting "year
    and a half" delay).   Equally as important, this was not a case in
    which the plaintiff's complaint contained such an obvious defect
    that it was unreasonable to wait until the district court ruled on
    the motion to dismiss before moving to amend.
    The district court's second ground for concluding that
    there was undue delay — that the allegations in the proposed
    amended complaint were not "new" — is no more convincing.   We agree
    that most of the facts undergirding Amyndas's proposed amended
    complaint were available before the hearing on the motion to
    dismiss.    But that circumstance, taken in a vacuum, cannot serve
    as a basis for denying Amyndas's motion to amend.       Responding
    specifically to one of the district court's grounds for dismissal
    by realigning previously articulated facts — as Amyndas did here
    — is a legitimate basis for amendment.
    We add, moreover, that this is a complex case in which
    ramified issues are at play.   Especially in complex cases, lawyers
    ought not to be expected to cobble together pleadings at breakneck
    - 42 -
    speed.    Taking four weeks to assimilate information — including
    information not publicly available until the day before the motion-
    to-dismiss hearing — and to separate Amyndas's claims against
    Zealand US from its claims against Zealand Pharma is within the
    realm of reasonableness.       As a result, Amyndas's delay cannot be
    fairly characterized as "undue."
    In    addition,   Amyndas's    proposed   amended   complaint
    incorporated new information, not available to it when it drafted
    its original complaint.        On this point, we reject the Zealand
    defendants' suggestion that a press release regarding trials of a
    complement therapeutic, issued jointly by Alexion and the Zealand
    entities on the day before the motion-to-dismiss hearing, could
    not be regarded as "new" for purposes of Amyndas's proposed amended
    complaint.       A party is not required to seek leave to amend its
    complaint each time a new piece of favorable information surfaces
    unless that new information is essential to the viability of its
    case.    Although parties should ordinarily take their best shot and
    not sit on new facts, see, e.g., Kader, 887 F.3d at 61; Villanueva,
    
    662 F.3d at 127
    , they should not be expected either to plead their
    cases in granular detail, see Fed. R. Civ. P. 8(a)(2) (requiring
    only "a short and plain statement of the claim showing that the
    pleader is entitled to relief"), or to seek leave to amend the
    very moment a few more facts come to light.
    - 43 -
    To sum up, Amyndas had a valid reason for seeking leave
    to amend and acted with reasonable diligence to cure the fatal
    defect in its original complaint and to put a proposed amended
    complaint   before     the    district       court.    Its   proposed    amended
    complaint not only made changes that were directly responsive to
    the district court's stated reasons for dismissing the original
    complaint but also incorporated some new information.                  Given the
    totality of the circumstances, the twenty-eight-day period that
    elapsed between the dismissal of the original complaint and the
    filing of the motion to amend cannot fairly be characterized as
    "undue delay."
    2
    The district court also cited futility as a further
    ground for denying leave to amend.            A proposed amendment is futile
    if it is either frivolous or contains some fatal defect.                       See
    Charles Alan Wright, Arthur R. Miller & Mary Kay Kane, 6 Fed. Prac.
    & Proc. Civ. § 1487 (3d ed. 2022).            Normally, this means that "the
    complaint, as amended, would fail to state a claim upon which
    relief could be granted."          Glassman v. Computervision Corp., 
    90 F.3d 617
    , 623 (1st Cir. 1996).
    Whether a proposed amendment is futile is "gauged by
    reference   to   the   liberal     criteria      of   Federal   Rule    of   Civil
    Procedure 12(b)(6)."         Juarez v. Select Portfolio Servicing, Inc.,
    
    708 F.3d 269
    , 276 (1st Cir. 2013); Hatch v. Dep't of Child., Youth
    - 44 -
    & Their Fams., 
    274 F.3d 12
    , 19 (1st Cir. 2001).              Reference to those
    criteria    teaches    that    if    the    amended    complaint    "contain[s]
    sufficient factual matter, accepted as true, to 'state a claim to
    relief that is plausible on its face,'" Ashcroft v. Iqbal, 
    556 U.S. 662
    , 678 (2009) (quoting Bell Atl. Corp. v. Twombly, 
    550 U.S. 544
    , 570 (2007)), and contains no other fatal defects, the district
    court abuses its discretion by denying the motion to amend on
    futility grounds, see Abraham v. Woods Hole Oceanographic Inst.,
    
    553 F.3d 114
    , 117 (1st Cir. 2009); see also Schreiber Distrib. Co.
    v. Serv-Well Furniture Co., 
    806 F.2d 1393
    , 1401 (9th Cir. 1986)
    ("If a complaint is dismissed for failure to state a claim, leave
    to amend should be granted unless the court determines that the
    allegation of other facts consistent with the challenged pleading
    could not possibly cure the deficiency.").
    The     issue,   then,    is    whether    the   proposed   amended
    complaint states a facially plausible claim against Zealand US.
    For   a    start,    the     proposed      amended    complaint    specifically
    differentiated between Zealand Pharma and Zealand US, thus curing
    the defect that the district court had specifically noted with
    respect to the original complaint.            See Amyndas, 
    2021 WL 4551433
    ,
    at *2-3.     Amyndas's proposed amended complaint alleged separate
    counts against Zealand US for misappropriation of trade secrets
    under the DTSA (count VIII), misappropriation of trade secrets
    under Massachusetts General Laws chapter 93, section 42 (count
    - 45 -
    IX), misappropriation of trade secrets under common law (count X),
    unfair competition (count XI), and unjust enrichment (count XII).
    Those allegations were sufficiently specific.           For example, the
    proposed amended complaint contained allegations to support the
    proposition that Zealand US was engaged in the continuing use of
    Amyndas's    improperly   retained   trade   secrets,    which   (Amyndas
    posited) formed the basis for misappropriation claims under both
    federal and state law.     See 
    18 U.S.C. §§ 1839
    (5)(A)-(B), 1836(d);
    
    Mass. Gen. Laws ch. 93, § 42
    ; see also Oakwood Lab'ys LLC v.
    Thanoo, 
    999 F.3d 892
    , 909 (3d Cir. 2021).
    Amyndas's allegations as to misappropriation in the
    proposed amended complaint included:
    •    "Zealand U.S. impermissibly acquired and
    accessed, and continues to impermissibly have
    access to Amyndas' trade secrets through
    Zealand A/S, which has failed to destroy all
    Amyndas    trade      secret    information    or
    information derived therefrom, or to erect
    walls to prevent improper disclosure to
    Zealand U.S., in view of the termination of
    the Amyndas-Zealand discussions in 2017. "
    •    "[T]he Alexion-Zealand collaboration is, on
    information and belief, intended to research,
    develop,     and     commercialize     technology
    improperly derived from Amyndas' trade secrets
    in the field of peptide pharmaceutical
    products, and Zealand U.S., as the arm of
    Zealand responsible for such efforts in the
    U.S.    with     respect     to   such    peptide
    pharmaceutical products is, on information and
    belief, directly involved with those efforts."
    •    "[O]n information and belief, Zealand U.S.,
    and its officers acting on behalf of Zealand
    U.S., participate in efforts relating to
    obtaining FDA approval for Zealand's peptide-
    - 46 -
    based medicines, such as the recently-approved
    [product    targeting    the   C3    protein].
    Therefore . . . Zealand U.S. and its officers
    have used and are currently using Amyndas'
    trade secrets in furtherance of the business
    purposes of Zealand U.S."
    •    "On information and belief, Zealand U.S. acts,
    at a minimum, as Zealand's representative to
    Alexion in connection with discussions,
    approvals and other developments related to
    Alexion's   efforts   to   commercialize   the
    products subject to the Zealand-Alexion
    agreement."
    These allegations, when viewed in combination, define a distinct
    course of conduct by Zealand US and connect that course of conduct
    to the unauthorized use of Amyndas's trade secrets.              Taken as true
    — as they must be, see Iqbal, 
    556 U.S. at
    678-79 — they adumbrate
    facially       plausible   claims   for   the   misappropriation     of   trade
    secrets.
    The   allegations    supporting    the   claims    for     unfair
    competition and unjust enrichment are similarly specific.                   The
    proposed amended complaint, taken as a whole, seemingly states
    plausible claims upon which relief could be granted.                 Yet, the
    district court did not engage with these allegations.              Rather, it
    focused much of its futility analysis on the                forum-selection
    clause.       The only references to Zealand US contained in its minute
    order are conclusory.
    Courts must take account of the reality of events.            In
    a case like this one, much of the information concerning the
    division of roles, responsibilities, and potential wrongdoing will
    - 47 -
    be in the possession of the defendants and may not become visible
    until after discovery is completed.          Cf. Grant v. News Grp. Bos.,
    Inc., 
    55 F.3d 1
    , 5 (1st Cir. 1995) (observing, in Title VII
    context, that district courts should be cautious about too quickly
    denying   leave   to   amend   in   cases    in    which   discovery   will   be
    essential to development of claims).                 The fact   that Amyndas
    unarguably cured the fatal defect in the original complaint that
    had been identified by the district court, coupled with the nature,
    detail, and apparent plausibility of Amyndas's claims, renders a
    finding of futility insupportable.
    3
    We summarize succinctly.               Amyndas sought to file a
    proposed amended complaint that stated facially plausible claims
    for relief against Zealand US.         That represented Amyndas's first
    attempt at amendment. The district court's conclusion that Amyndas
    unduly delayed in moving for leave to file that complaint is
    insupportable, as is the district court's conclusion that the
    asserted claims are futile.          And, finally, Zealand US has not
    advanced any credible claim of prejudice.            We conclude, therefore,
    that the district court's denial of the motion to amend constituted
    an abuse of discretion.        Consequently, both its denial of that
    motion and its subsequent dismissal of Amyndas's claims against
    Zealand US must be vacated, and the case must be remanded for
    further proceedings consistent with this opinion.
    - 48 -
    IV
    We need go no further. For the reasons elucidated above,
    we affirm the dismissal of Amyndas's claims against Zealand Pharma.
    We vacate the dismissal of Amyndas's claims against Zealand US and
    remand for further proceedings consistent with this opinion.   All
    parties shall bear their own costs.
    Affirmed in part, vacated in part, and remanded.
    - 49 -