6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

Pursuant to Section 13a-16 or 15d-16 of the Securities Exchange Act of 1934

For the month of June 2017

Commission File Number:  001-37569

STRONGBRIDGE BIOPHARMA plc

(Exact name of Registrant as specified in its charter)

900 Northbrook Drive

Suite 200

Trevose, PA 19053

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x   Form 40-F o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): o

On June 23, 2017, Strongbridge Biopharma plc (the “Registrant”) issued a press release regarding new employment inducement awards.

The information contained in the press release is being furnished to the Commission and shall not be deemed incorporated by reference into any of the Registrant’s registration statements or other filings with the Commission.

Exhibits

Exhibit Number	Exhibit Table
99.1	Press Release issued by Strongbridge Biopharma plc, dated June 23, 2017.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

Dated: June 23, 2017	STRONGBRIDGE BIOPHARMA PLC
	By:	/s/ Stephen Long
		Stephen Long
		Chief Legal Officer

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EX-99.1

Exhibit 99.1

Strongbridge Biopharma plc Announces New Employment Inducement Awards

Dublin, Ireland and Trevose, Pa., June 23, 2017 — Strongbridge Biopharma plc, (Nasdaq: SBBP), a global commercial-stage biopharmaceutical company focused on the development and commercialization of therapies for rare diseases with significant unmet needs, today announced that it has approved inducement equity awards to three individuals who have recently become, or are expected to become, non-executive employees of the Company.

The inducement awards are being made in the form of non-qualified stock options to purchase an aggregate of 279,000 ordinary shares of the Company and restricted stock units (RSUs) representing 15,000 ordinary shares of the Company, and are being made as a material inducement to these individuals to enter into employment with the Company pursuant to NASDAQ Listing Rule 5635(c)(4).

The exercise price of the options will be equal to the closing price of the Company’s ordinary shares on the grant date. One quarter of the options will vest on the one-year anniversary of the grant date and the remaining three quarters of the options will vest in 12 equal quarterly installments following the one-year anniversary of the grant date, subject to the employee’s continuous employment with the Company. The options will have a ten-year term. The RSUs will vest on the two-year anniversary of the grant date, subject to the employee’s continuous employment with the Company. The options and RSUs will be subject to the terms and conditions of the Company’s 2017 Inducement Plan, pursuant to which the options and RSUs have been, or will be, granted.

About Strongbridge Biopharma

Strongbridge Biopharma is a global commercial-stage biopharmaceutical company focused on the development and commercialization of therapies for rare diseases with significant unmet needs. Strongbridge’s first commercial product is KEVEYIS® (dichlorphenamide), the first and only FDA-approved treatment for hyperkalemic, hypokalemic, and related variants of Primary Periodic Paralysis. KEVEYIS has orphan drug exclusivity status in the U.S. through August 7, 2022. In addition to establishing this neuromuscular disease franchise, the Company has a clinical-stage pipeline of therapies for rare endocrine diseases. Strongbridge’s lead compounds include RECORLEV™ (levoketoconazole), a cortisol synthesis inhibitor currently being studied for the treatment of endogenous Cushing’s syndrome, and veldoreotide, a next-generation somatostatin analog being investigated for the treatment of acromegaly, with potential additional applications in Cushing’s syndrome and neuroendocrine tumors. Both RECORLEV and veldoreotide have received orphan designation from the U.S. Food and Drug Administration and the European Medicines Agency. For more information, visit www.strongbridgebio.com.

Forward-Looking Statements

All statements, other than statements of historical facts, contained in this press release, are forward-looking statements. These statements relate to future events and involve known and unknown risks, including, without limitation, uncertainties regarding Strongbridge’s strategy, plans, and objectives of management for future operations. The words “anticipate,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “project,” “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 and are not guarantees of future performance or development and involve known and unknown risks, uncertainties and other factors. The forward-looking statements contained in this press release are made as of the date of this press release, and Strongbridge Biopharma does not assume any obligation to update any forward-looking statements except as required by applicable law.

Contacts:

Corporate and Media Relations
Elixir Health Public Relations
Lindsay Rocco
+1 862-596-1304
lrocco@elixirhealthpr.com

Investor Relations

U.S.:

The Trout Group
Marcy Nanus
+1 646-378-2927
mnanus@troutgroup.com

Europe:

First House

Mitra Hagen Negård

+47 21 04 62 19

strongbridgebio@firsthouse.no

USA
900 Northbrook Drive
Suite 200
Trevose, PA 19053
Tel. +1 610-254-9200
Fax. +1 215-355-7389