Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 28, 2023


(Exact Name of Company as Specified in Charter)






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100 Corporate Court


South Plainfield, NJ


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Common Stock, $0.001 par value per share


Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Item 2.05. Costs Associated with Exit or Disposal Activities.

On September 28, 2023, PTC Therapeutics, Inc. (the “Company”) announced further strategic prioritization following the continued review of its portfolio that the Company began in May 2023. In connection with the strategic prioritization, on September 28, 2023, the Company committed to a reduction in workforce of approximately 25%, which will primarily affect employees in the United States, including those employees involved in early-stage research and gene therapy manufacturing and associated selling, general and administrative functions.


The Company plans to substantially complete the reduction in workforce by January 15, 2024. Affected employees will be offered separation benefits, including severance payments along with temporary healthcare coverage assistance and other benefits. The Company estimates that the employee severance and benefit costs along with required pre-termination associated payments and benefits will be approximately $21.0 million, substantially all of which are expected to be cash expenditures. The estimate of costs that the Company expects to incur, and the timing thereof, are subject to a number of assumptions and actual results may differ. The Company may also incur other charges or cash expenditures not currently contemplated due to events that may occur as a result of, or associated with, the reduction in workforce.

Item 7.01. Regulation FD Disclosure.

On September 28, 2023, the Company issued a press release regarding the strategic prioritization and associated reduction in workforce, furnished as Exhibit 99.1 to this Current Report on Form 8-K (this “Report”).

The information in this Item 7.01 of this Report, including Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing. All website addresses given in this Report or incorporated herein by reference are for information only and are not intended to be an active link or to incorporate any website information into this Report.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.




Press Release, dated September 28, 2023 issued by PTC Therapeutics, Inc.


The cover page from this Current Report on Form 8-K, formatted in Inline XBRL


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.

PTC Therapeutics, Inc.

Date: September 28, 2023


/s/ Pierre Gravier


Pierre Gravier


Chief Financial Officer


PTC Announces Further Strategic Prioritization and
Associated Reduction in Workforce

- Translarna CHMP opinion re-examination request to be submitted -

SOUTH PLAINFIELD, N.J., Sept. 28, 2023 - PTC Therapeutics, Inc. (NASDAQ: PTCT) announced today further strategic prioritization and associated workforce reduction. The portfolio prioritization continues the process initiated in May 2023 as the company continues to focus its resources on its differentiated, high potential R&D programs and on support of the robust global commercial infrastructure. The company also confirmed today its plans to submit the re-examination request for the CHMP opinion on Translarna.

“We remain confident that we have the data to address the concerns raised by CHMP in its negative opinion,” said Matthew B. Klein, M.D., Chief Executive Officer, PTC Therapeutics. “The totality of evidence collected in three placebo-controlled trials and in the STRIDE registry provide clear evidence of Translarna’s benefit. In addition, the patient and physician communities strongly believe in the benefits of Translarna and have shared their motivation to support the efforts to maintain authorization for the only approved Duchenne muscular dystrophy therapy in Europe.”

The workforce reduction impacted approximately 25% of the organization, and primarily included employees working on early-stage research programs, employees at the gene therapy manufacturing facility located in Hopewell, NJ and associated SG&A functions. Implementation of these cost saving measures is expected to result in an approximate 20% reduction in annualized operating expenses compared to 2023 OPEX guidance.

“I would like to acknowledge the tremendous contribution of the PTC team members affected by the reduction in workforce,” Klein continued. “The workforce and OPEX reductions continue the efforts we began in May to focus resources on key R&D programs and our commercial enterprise. PTC has a number of valuable assets that form the foundation of a promising future including the sepiapterin PKU program, the PTC518 Huntington disease program and the Evrysdi collaboration and royalty revenue.”

About PTC Therapeutics, Inc.

PTC is a global biopharmaceutical company focused on the discovery, development and commercialization of clinically differentiated medicines that provide benefits to patients with rare disorders. PTC's ability to innovate to identify new therapies and to globally commercialize products is the foundation that drives investment in a robust and diversified pipeline of transformative medicines. PTC's mission is to provide access to best-in-class treatments for patients who have little to no treatment options. PTC's strategy is to leverage its strong scientific and clinical expertise and global commercial infrastructure to bring therapies to patients. PTC believes this allows it to maximize value for all its stakeholders. To learn more about PTC, please visit us at www.ptcbio.com and follow us on Facebook, Instagram, LinkedIn and Twitter at @PTCBio.

For More Information:


Kylie O'Keefe

+1 (908) 300-0691



Jeanine Clemente

+1 (908) 912-9406



CHMP: Committee for Medicinal Products for Human Use

EMA: European Medicines Agency

OPEX: Operating Expenses

PKU: Phenylketonuria

SG&A: Selling, General and Administrative

Forward-Looking Statement

This press release contains forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. All statements contained in this press release, other than statements of historic fact, are forward-looking statements, including statements regarding the extent, timing and financial aspects of the strategic prioritization and reduction in workforce; PTC's plans for interactions with the European Medicines Agency (EMA); the outcome of any re-examination process; the clinical utility and potential advantages of Translarna (ataluren); the future expectations, plans and prospects for PTC, including with respect to the expected timing of clinical trials and studies, availability of data, regulatory submissions and responses and other matters, future strategy, future operations, future financial position, future revenues, projected costs; and the objectives of management. Other forward-looking statements may be identified by the words, "guidance", "plan," "anticipate," "believe," "estimate," "expect," "intend," "may," "target," "potential," "will," "would," "could," "should," "continue," and similar expressions.

PTC's actual results, performance or achievements could differ materially from those expressed or implied by forward -looking statements it makes as a result of a variety of risks and uncertainties, including those related to: the outcome of pricing, coverage and reimbursement negotiations with third party payors for PTC's products or product candidates that PTC commercializes or may commercialize in the future; the timing of and actual expenses incurred in connection with the strategic prioritization and reduction in workforce, which may be in different periods and may be materially higher than we estimate; the savings that may result from the strategic prioritization and reduction in workforce, which may be materially less than we expect; PTC's ability to maintain its marketing authorization of Translarna for the treatment of nmDMD in Brazil, Russia, the European Economic Area (EEA) and other regions, including whether the European Medicines Agency (EMA) determines in the re-examination process that the benefit-risk balance of Translarna authorization supports renewal of such authorization or its conversion to a full approval; PTC's ability to complete Study 041, a randomized, 18-month, placebo-controlled clinical trial of Translarna for the treatment of nmDMD followed by an 18-month open-label extension, which is a specific obligation to continued marketing authorization in the EEA; PTC's ability to utilize results from Study 041 to support a marketing approval for Translarna for the treatment of nmDMD in the United States and a conversion to a standard marketing authorization in the EEA; whether investigators agree with PTC's interpretation of the results of clinical trials and the totality of clinical data from our trials in Translarna; significant business effects, including the effects of industry, market, economic, political or regulatory conditions; changes in tax and other laws, regulations, rates and policies; the eligible patient base and commercial potential of PTC’s products and product candidates; PTC's scientific approach and general development progress; the sufficiency of PTC's cash resources and its ability to obtain adequate financing in the future for its foreseeable and unforeseeable operating expenses and capital expenditures; and the factors discussed in the "Risk Factors" section of PTC's most recent Annual Report on Form 10 -K, as well as any updates to these risk factors filed from time to time in PTC's other filings with the SEC. You are urged to carefully consider all such factors.

As with any pharmaceutical under development, there are significant risks in the development, regulatory approval and commercialization of new products. There are no guarantees that any product will receive or maintain regulatory approval in any territory, or prove to be commercially successful, including Translarna.

The forward-looking statements contained herein represent PTC's views only as of the date of this press release and PTC does not undertake or plan to update or revise any such forward-looking statements to reflect actual results or changes in plans, prospects, assumptions, estimates or projections, or other circumstances occurring after the date of this press release except as required by law.