Exhibit 99.1

Nexvet Biopharma plc (“Nexvet”) Rule 2.10 Announcement

DUBLIN, Ireland – June 19, 2017 – Nexvet Biopharma (Nasdaq: NVET) today announced the following;

In accordance with Rule 2.10 of the Irish Takeover Panel Act 1997, Takeover Rules, 2013 (the “Irish Takeover Rules”), Nexvet confirms that as at close of business on June 16, 2017 its issued share capital comprised 11,922,150 ordinary shares of $0.125 each (the “Ordinary Shares”). The Ordinary Shares are admitted to trading on NASDAQ under the ticker symbol NVET. The International Securities Identification Number for these securities is IE00BVB38Y49.

There are 1,766,998 warrants, 632,702 options and 643,664 restricted share units in respect of in aggregate 3,043,364 Nexvet ordinary shares and 400 Nexvet euro deferred shares outstanding.

The directors of Nexvet accept responsibility for the information contained in this announcement. To the best of the knowledge and belief of the directors of Nexvet (who have taken all reasonable care to ensure that such is the case) the information contained in this announcement for which they accept responsibility is in accordance with the facts and does not omit anything likely to affect the import of such information.

The release, publication or distribution of this announcement in or into certain jurisdictions may be restricted by the laws of those jurisdictions. Accordingly, copies of this announcement and all other announcements relating to the acquisition are not being, and must not be, released, published, mailed or otherwise forwarded, distributed or sent in, into or from any restricted jurisdiction. Persons receiving such announcements (including, without limitation, nominees, trustees and custodians) should observe these restrictions. Failure to do so may constitute a violation of the securities laws of any such jurisdiction. To the fullest extent permitted by applicable law, the companies involved in the acquisition disclaim any responsibility or liability for the violations of any such restrictions by any person.

Under the provisions of Rule 8.3 of the Irish Takeover Rules, if any person is, or becomes, “interested” (directly or indirectly) in, 1% or more of any class of “relevant securities” of Nexvet, all “dealings” in any “relevant securities” of Nexvet (including by means of an option in respect of, or a derivative referenced to, any such “relevant securities”) must be publicly disclosed by not later than 3:30 p.m. (Eastern Time) on the “business day” following the date of the relevant transaction. This requirement will continue until the date on which the “offer period” ends. If two or more persons cooperate on the basis of any agreement, either express or tacit, either oral or written, to acquire an “interest” in “relevant securities” of Nexvet, they will be deemed to be a single person for the purpose of Rule 8.3 of the Irish Takeover Rules.

Under the provisions of Rule 8.1 of the Irish Takeover Rules, all “dealings” in “relevant securities” of Nexvet by Zoetis Inc. or Zoetis Belgium S.A., or by any party acting in concert with it, or by any party acting in concert with any of them, must also be disclosed by no later than 12 p.m. (Eastern Time) on the “business” day following the date of the relevant transaction.

A disclosure table, giving details of the companies in whose “relevant securities” “dealings” should be disclosed, can be found on the Irish Takeover Panel’s website at www.irishtakeoverpanel.ie.

“Interests in securities” arise, in summary, when a person has long economic exposure, whether conditional or absolute, to changes in the price of securities. In particular, a person will be treated as having an “interest” by virtue of the ownership or control of securities, or by virtue of any option in respect of, or derivative referenced to, securities. Terms in quotation marks are defined in the Irish Takeover Rules, which can also be found on the Irish Takeover Panel’s website.

If you are in any doubt as to whether or not you are required to disclose a dealing under Rule 8, please consult the Irish Takeover Panel’s website at www.irishtakeoverpanel.ie or contact the Irish Takeover Panel on telephone number +353 1 678 9020 or fax number +353 1 678 9289.

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NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, DIRECTLY OR INDIRECTLY (IN WHOLE OR IN PART) IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OF SUCH JURISDICTION

About Nexvet (www.nexvet.com)

Nexvet is a clinical-stage biopharmaceutical company focused on transforming the therapeutic market for companion animals, such as dogs and cats, by developing and commercializing novel, species-specific biologics. Nexvet’s proprietary PETization™ platform is designed to rapidly design monoclonal antibodies (mAbs) that are recognized as “self” or “native” by an animal’s immune system, a property Nexvet refers to as “100% species-specificity.” Nexvet’s product candidates build upon the safety and efficacy data from clinically tested human therapies, thereby reducing clinical risk and development cost.

Nexvet is leveraging diverse global expertise and incentives to build a vertically integrated biopharmaceutical company, which conducts drug discovery in Australia, conducts clinical development in the United States and Europe and conducts manufacturing in Ireland.

Further information:   Investors   Hershel Berry Blueprint Life Science Group +1 415-375-3340 Ext. 1 hberry@bplifescience.com   Company   Damian Lismore CFO, Nexvet Biopharma plc +61 417-351-272 (Aus.) damian.lismore@nexvet.com

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Forward looking statements

This press release contains forward looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Forward looking statements consist of all statements other than statements of historical fact, including statements regarding our future results of operations and financial position, potential acquisition by Zoetis, ability to access financing on acceptable terms or at all, results of any current or future pivotal study, future expenditures relating to our lead product candidates, time for completion of any of our studies or facilities upgrades, ability to develop our pipeline of product candidates, business strategy, prospective products, ability to successfully manufacture our own product candidates, ability to meet conditions for the receipt of government grants, time for regulatory submissions or ability to qualify for conditional licensure or obtain product approvals, research and development costs, timing and likelihood of success, plans and objectives of management for future operations, and future results of current and anticipated products. These statements relate to future events or to our future financial performance and involve known and unknown risks, uncertainties and other factors which may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward looking statements. The words “anticipate,” “assume,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “objective,” “plan,” “potential,” “predict,” “project,” “position,” “seek,” “should,” “target,” “will,” “would,” or the negative of these terms or other similar expressions are intended to identify forward looking statements, although not all forward looking statements contain these identifying words. These forward looking statements are based on current expectations, estimates, forecasts and projections about our business and the industry in which we operate, and management’s beliefs and assumptions are not guarantees of future performance or development and involve known and unknown risks, uncertainties and other factors.

Factors that could cause actual results to differ materially from our expectations expressed in this report include those summarized under Risk Factors in our reports on Forms 10-Q and 10-K and the other documents we file from time to time with the Securities and Exchange Commission. Given these risks and uncertainties, you should not place undue reliance on these forward looking statements. Also, forward looking statements represent management’s beliefs and assumptions only as of the date of this press release. Except as required by law, we do not intend, and undertake no obligation, to revise or update these forward looking statements or to update the reasons actual results could differ materially from those anticipated in these forward looking statements, even if new information becomes available in the future.

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