Attorneys for TWIST BIOSCIENCE CORP. and EMILY LEPROUST. 16CV Reviewed By:R. Walker COUNTY OF SANTA CLARA. Case No.

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QUINN EMANUEL URQUHART & SULLIVAN LLP KEVIN P.B. JOHNSON (S.B. #) kevinjohnson@quinnemanuel.com VICTORIA F. MAROULIS (S.B. #0) victoriamaroulis@quinnemanuel.com ANDREW J. BRAMHALL (S.B. #1) andrewbramhall@quinnemanuel.com Twin Dolphin Dr., th Floor Redwood Shores, California 0 Telephone: (0) 01-000 Facsimile: (0) 01-0 Attorneys for TWIST BIOSCIENCE CORP. and EMILY LEPROUST KEKER & VAN NEST LLP STUART L. GASNER (S.B. #) sgasner@kvn.com LEO L. LAM (S.B. #1) llam@kvn.com BENEDICT Y. HUR (S.B. #0) bhur@kvn.com Battery Street San Francisco, CA 1-0 Telephone: () 1-00 Facsimile: () - E-FILED 1/0/ :: PM Clerk of Court Superior Court of CA, County of Santa Clara SUPERIOR COURT OF THE STATE OF CALIFORNIA CV Reviewed By:R. Walker COUNTY OF SANTA CLARA AGILENT TECHNOLOGIES, INC., a Delaware Corporation, v. Plaintiff, TWIST BIOSCIENCE CORP., a Delaware Corporation; EMILY LEPROUST, an Individual; and DOES 1 through, inclusive, Defendants. Case No. -cv- DEFENDANTS ANSWER AND AFFIRMATIVE DEFENSES TO PLAINTIFF S FIRST AMENDED COMPLAINT Action Filed: Feb., Judge: Location: Hon. Brian C. Walsh Department 1 - Case No. -cv-

Defendants Twist Bioscience Corp. ( Twist ) and Emily Leproust ( Leproust ) (together the Defendants ), hereby answer the first amended complaint of plaintiff Agilent Technologies, Inc. ( Agilent or Plaintiff ). GENERAL DENIAL Pursuant to California Code of Civil Procedure 1.0(d), Defendants hereby deny each and every material allegation in the first amended complaint and further deny that Agilent has been damaged in the manner alleged, in any manner, or in any amount. FACTS SUPPORTING GENERAL DENIAL AND AFFIRMATIVE DEFENSES 1. Agilent s lawsuit against Twist and Dr. Emily Leproust attempts to stifle the legitimate and innovative work of a burgeoning start-up company and one of its top executives. In particular, Agilent s complaint wrongly tries to suffocate the creation of new technology and solutions by a new business, and to diminish the freedom of innovators and entrepreneurs to seek out more fulfilling work and succeed elsewhere. Twist s Innovative Origins. Twist originated as a collaboration between two engineers, Bill Banyai, Ph.D., and Bill Peck, Ph.D., based on the idea that the synthetic DNA market could be revolutionized through a new oligonucleotide synthesis and gene assembly technology. Applying their engineering expertise, Banyai and Peck conceived of a new and innovative way to synthesize oligonucleotides ( oligos ), which are short DNA sequences, and assemble them into longer DNA constructs, such as genes, more effectively than existing technology allowed.. Dr. Banyai and Dr. Peck met in 0 while working at Complete Genomics, a DNA sequencing company in Mountain View, California. Banyai is a former Stanford engineer with a Ph.D. in optical science from the University of Arizona, and previously worked as a physicist at Lawrence Livermore National Laboratory in Livermore, California. Peck holds a Ph.D. in mechanical engineering from the University of Alberta and completed a Stanford postdoc at NASA.. Banyai and Peck began independently developing their start-up idea in while working together at Complete Genomics, which had long been using synthesized oligos to -- Case No. -cv-

sequence human genomic DNA patterned on silicon chips. Banyai was hired in 0 to build Complete Genomics DNA sequencing team and technology from the ground up. Banyai recruited Peck to join his team in 0. Banyai, Peck, and Leproust left their respective jobs at Complete Genomics and Agilent in April to pursue their start-up efforts in the form of Twist.. Banyai and Peck conceived and later refined through collaboration with other brilliant and accomplished scientists and engineers innovative silicon-based technologies and other innovations for synthesizing custom oligos and assembling them into longer synthetic DNA constructs. These innovations are the subject of multiple patent applications filed by Twist. Two of the applications have already been granted and issued as United States patents, having undergone examination by the USPTO, which deemed Banyai and Peck s innovations to be novel over older technology. Significantly, although Twist s patents and applications manifest the innovations conceived and developed by Banyai and Peck, not one of them is in dispute in Agilent s lawsuit. Agilent does not allege that Banyai and Peck incorporated Agilent s purported trade secrets into those patents and applications.. Early on, Twist s founders approached venture capitalists with Banyai and Peck s ideas for revolutionizing the synthetic DNA industry. Twist s fundraising success came from showing investors how the limitations of then-current technologies could likely be overcome if Twist were able to pursue its silicon-based engineering solutions. With an early infusion of capital based on this potential, Twist was able to quickly develop new, patentable technology.. Beginning with just Banyai, Peck, and Leproust in April, Twist has now grown to over 0 employees. Twist s cutting edge, made-to-order synthetic DNA is offered to researchers and companies for a wide range of uses, including personalized medicine, pharmaceutical research, biodefense, genome engineering, and even data storage.. Numerous prospective employees have been drawn to Twist because of its proven leadership, start-up atmosphere, and position at the leading edge of the synthetic DNA industry. Twist s employees have come from all over the industry and world, including many who followed Banyai over the years from Complete Genomics, as well as Glimmerglass, the first company Banyai founded. -- Case No. -cv-

Dr. Leproust s Loyalty To Agilent And Lawful Choice To Find New Employment. Dr. Emily Leproust earned a Ph.D. in Organic Chemistry in 01 from the University of Houston where she was published extensively for her research and development of novel DNA microarray synthesis processes, including novel synthesis chemistry and microarray characterization. Recognizing Leproust s talent, Agilent hired her even before she finished her degree. For nearly years, Leproust worked at Agilent, making important contributions to Agilent s research, development, and manufacturing of DNA microarray products and applications, authoring and co-authoring numerous peer-reviewed papers, collaborating with researchers at public universities, and undertaking increased responsibilities.. For many years, Agilent recognized Leproust s efforts, enthusiasm, and work ethic, conferring promotions, awards, and additional opportunities on her. Indeed, Leproust was consistently ranked in the top % of employees every year from 00 to.. Starting in 0, Leproust pioneered, architected, and championed a product for Agilent called SureSelect, which launched in 0 and became a major success for the Genomics division. It also made Agilent a major player in the field of DNA sequencing despite Agilent not offering a sequencing machine. To make SureSelect a success, Leproust spent an increasing and significant portion of her time on business duties, such as assisting the marketing, sales, and customer support departments, while still earning top marks for her R&D accomplishments. After that experience, Leproust wanted to get involved full-time in a business role, but instead the opposite happened. Leproust had her responsibilities reduced to R&D work of lesser importance, even having her SureSelect responsibilities reassigned to others.. Leproust nevertheless continued to loyally work full-time at Agilent until resigning on April,. Leproust faithfully performed her Agilent duties while employed there, each year meeting, and exceeding, the goals set for her. Even after learning of Banyai and Peck s idea for the company that became Twist, her interactions with them prior to leaving Agilent did not encumber her work in advancing Agilent s research nor divide her loyalties.. As Twist s first and only Chief Executive Officer, Leproust has provided executive leadership. Banyai and Peck have served as Chief Operating Officer and Chief Technology -- Case No. -cv-

Officer, respectively, since Twist s founding, leading the technical work. Agilent s Opportunistic Lawsuit Against Leproust And Twist. The timing of Agilent s lawsuit is telling only after waiting and watching Twist s success, and failing to perform in the marketplace on its own, has Agilent turned to litigation. In April, though fully aware that it could try to develop its own technology to compete with other companies already in the synthetic DNA marketplace, Agilent decided to take a shortcut through an investment in an outside company called Gen already doing work in the field. Nevertheless, despite making a substantial initial investment in Gen, Agilent failed to provide Gen continued material support, either financially or through technology sharing. Instead, after trying to entice Leproust back by offering her an R&D leadership position, Agilent set its sights on litigation.. In February, Agilent had its attorneys send letters to Twist ostensibly to remind Leproust of her purported obligations regarding use of Agilent trade secrets and confidential information. Agilent admitted in those letters that it knew Twist was in the process of developing DNA products at the time, but took no legal action nor gave any indication it planned to file a lawsuit. Agilent then sat idly for two years. Not until February, after Twist had done the hard work of establishing itself and its silicon-based technology as a game changer in the synthetic DNA industry, did Agilent make any further moves. And this time, instead of approaching Twist in any way, Agilent filed this lawsuit without any advance notice, falsely and harmfully accusing Twist and Leproust of misconduct.. Despite supposed concern that its trade secrets were being misused and its interests harmed, Agilent waited to file suit until after the media publicly reported an infusion of tens of millions of dollars of new investor capital in Twist. What s more, Agilent has based this lawsuit on the misguided conceit that Agilent s way of printing DNA, which was designed as an assembly line for glass-slide microarrays, is the only way Twist could have achieved the results it did with synthesized oligos, and that Twist must therefore be using Agilent s technology. What Agilent fails to realize is that Twist s technology, unlike Agilent s, was purpose built from the start for creating commercial synthetic genes, which allowed for engineering trade-offs that Agilent did not -- Case No. -cv-

consider or could not implement.. Through this lawsuit, Agilent attempts to circumvent hard work, innovation, and competition in the marketplace by litigating its way into a share of Twist s hard-earned success. The value of Twist and its technology, however, are based on the pioneering work of founders Bill Banyai and Bill Peck, along with the business leadership of Emily Leproust: assets that Agilent simply has no right to claim. AFFIRMATIVE DEFENSES. By alleging the affirmative defenses set forth below, the Defendants do not agree or concede that they bear the burden of production or persuasion on any of these issues, whether in whole or in part. Defendants assert the following affirmative defenses to the first amended complaint: FIRST AFFIRMATIVE DEFENSE Plaintiff has failed to state facts sufficient to constitute a cause of action. SECOND AFFIRMATIVE DEFENSE Plaintiff released, relinquished, waived, and/or abandoned any right to any of the claims upon which Plaintiff now seeks relief. THIRD AFFIRMATIVE DEFENSE Plaintiff s claims are barred, in whole or in part, by any and all applicable statutes of limitations. FOURTH AFFIRMATIVE DEFENSE Any alleged conduct or omission by Defendants was not the cause in fact or proximate cause of any injury alleged by Plaintiff. FIFTH AFFIRMATIVE DEFENSE Plaintiff s purported trade secrets are not protectable or were otherwise not misappropriated because they were already disclosed within the public domain, were generally known, or were the subject of independent development or ready ascertainability. SIXTH AFFIRMATIVE DEFENSE Plaintiff has failed to state facts sufficient to support an award of punitive damages. -- Case No. -cv-

SEVENTH AFFIRMATIVE DEFENSE Plaintiff s claims are barred, in whole or in part, by the doctrine of laches. EIGHTH AFFIRMATIVE DEFENSE Plaintiff s claims are barred, in whole or in part, because by virtue of its own conduct, Plaintiff is estopped from recovering from Defendants. NINTH AFFIRMATIVE DEFENSE Plaintiff s claims are barred, in whole or in part, by the doctrine of unclean hands. TENTH AFFIRMATIVE DEFENSE Defendants have not committed the wrongs alleged in the first amended complaint. Thus, Plaintiff is barred from recovery, in whole or in part, to the extent that recovery by Plaintiff would constitute unjust enrichment and a windfall to Plaintiff. ELEVENTH AFFIRMATIVE DEFENSE Plaintiff is barred from recovery, in whole or part, because any actions taken by Defendants, if any, with respect to Plaintiff, were based on an honest, reasonable, and good faith belief in the facts as known and understood at the time. TWELFTH AFFIRMATIVE DEFENSE At all relevant times, Plaintiff consented to and approved all the purported acts and omissions about which Plaintiff now complains. THIRTEENTH AFFIRMATIVE DEFENSE Plaintiff s claims are barred, in whole or in part, to the extent the purported acts and omissions about which Plaintiff now complains are licensed or otherwise authorized by persons or entities with the right to license or authorize. FOURTEENTH AFFIRMATIVE DEFENSE Plaintiff s claims for a constructive trust are barred or otherwise unavailable, either in whole or part, under the California Uniform Trade Secrets Act and California contract law. FIFTEENTH AFFIRMATIVE DEFENSE Plaintiff s claims for a constructive trust are barred, either in whole or part, because Defendants alleged profits, gains, increases in value, or equity interests are not the result of any -- Case No. -cv-

conduct complained of by Plaintiff. SIXTEENTH AFFIRMATIVE DEFENSE Plaintiff s claims are barred because they seek to enforce purported contract provisions that are against public policy and are therefore void and unenforceable, including under Cal. Business and Professions Code 00 et seq. SEVENTEENTH AFFIRMATIVE DEFENSE Plaintiff s claims are barred because Plaintiff failed to take reasonable efforts and/or precautions to protect its purported trade secrets. EIGHTEENTH AFFIRMATIVE DEFENSE Plaintiff s claim for misappropriation of trade secrets was brought and has been maintained in bad faith, as Plaintiff had no evidence of misappropriation prior to commencing this lawsuit and continues to maintain this suit even after exculpatory evidence has been made known. NINETEENTH AFFIRMATIVE DEFENSE Plaintiff has failed to state facts sufficient to support an award of attorneys fees against Defendants. TWENTIETH AFFIRMATIVE DEFENSE Plaintiff s request for injunctive relief is improper as there is no likelihood of future injury to Plaintiff and there exists an adequate remedy at law to address the claims set forth in the first amended complaint. TWENTY FIRST AFFIRMATIVE DEFENSE Plaintiff voluntarily and with knowledge assumed the risk of all damages of which Plaintiff complains. TWENTY SECOND AFFIRMATIVE DEFENSE Plaintiff failed to take reasonable efforts or make reasonable expenditures to mitigate and/or avoid the damages of which Plaintiff complains. TWENTY THIRD AFFIRMATIVE DEFENSE Plaintiff s claim for breach of contract is barred, either in whole or in part, because there is no enforceable contract, including because there was no mutual assent or exchange of valuable -- Case No. -cv-

consideration between the parties to the alleged contract. RESERVATION OF RIGHTS Defendants reserve the right to assert additional defenses, including based on additional information learned or obtained during discovery. PRAYER FOR RELIEF Wherefore, Defendants pray for relief as follows: 1. That the Complaint be dismissed with prejudice and that Plaintiff take nothing thereby;. For Defendants costs of suit, including reasonable attorneys fees;. For attorneys fees and costs pursuant to California Civil Code Section.; and. For such other and further relief as the Court may deem proper. DATED: January 0, Respectfully submitted, By QUINN EMANUEL URQUHART & SULLIVAN, LLP Kevin P.B. Johnson Victoria F. Maroulis Andrew J. Bramhall KEKER & VAN NEST LLP Stuart L. Gasner Leo L. Lam Benedict Y. Hur Attorneys for TWIST BIOSCIENCE CORP. and EMILY LEPROUST -- Case No. -cv-