Registration Statement No: 333-208227


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Table of Contents

Filed Pursuant to Rule 424(b)(1)

Registration Statement No: 333-208227

 

3,000,000 shares

 

 



 

Common stock

Spark Therapeutics, Inc. is offering 2,000,000 shares of common stock and The Children’s Hospital of Philadelphia Foundation, the selling stockholder identified in this prospectus, is offering 1,000,000 shares of our common stock. We will not receive any proceeds from the sale of any shares by the selling stockholder.

Our common stock is listed on the NASDAQ Global Select Market under the symbol “ONCE.” On December 15, 2015, the last sale price of our common stock as reported on the NASDAQ Global Select Market was $48.55 per share.

We are an emerging growth company as that term is used in the Jumpstart Our Business Startups Act of 2012 and, as such, have elected to comply with certain reduced public reporting requirements.

 

 

 

 

 

 

 

 

 

 

  

    

Per share

 

    

Total

 

 

 

 

Public offering price

    

$

47.00

  

    

$

141,000,000

  

 

 

 

Underwriting discounts and commissions(1)

    

$

2.82

  

    

$

8,460,000

  

 

 

 

Proceeds to Spark, before expenses

    

$

44.18

  

    

$

88,360,000

  

 

 

 

Proceeds to selling stockholder

    

$

44.18

  

    

$

44,180,000

  

 

(1)

 

We have agreed to reimburse the underwriters for certain FINRA-related expenses. See “Underwriting” in this prospectus.

We and the selling stockholder have granted the underwriters an option for a period of 30 days to purchase up to an additional 450,000 shares of common stock.

Investing in our common stock involves risks. See “Risk factors” beginning on page 13 of this prospectus.

Neither the Securities and Exchange Commission nor any other regulatory body has approved or disapproved of these securities or passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offense.

The underwriters expect to deliver the shares of common stock to investors on or about December 21, 2015.

 

 

 

 

 

 

 

 

 

J.P. Morgan

 

Cowen and Company

 

Evercore ISI

SunTrust Robinson Humphrey

Roth Capital Partners

The date of this prospectus is December 15, 2015.
Table of Contents

Table of contents

 

 

 

 

 

 

 

 

Prospectus summary

  

 

1

  

 

 

Risk factors

  

 

13

  

 

 

Special note regarding forward-looking statements

  

 

62

  

 

 

Use of proceeds

  

 

64

  

 

 

Price range of common stock

  

 

65

  

 

 

Dividend policy

  

 

65

  

 

 

Industry and other data

  

 

65

  

 

 

Capitalization

  

 

66

  

 

 

Dilution

  

 

67

  

 

 

Selected financial data

  

 

68

  

 

 

Management’s discussion and analysis of financial condition and results of operations

  

 

70

  

 

 

Business

  

 

84

  

 

 

Management

  

 

130

  

 

 

Executive compensation

  

 

137

  

 

 

Certain relationships and related-person transactions

  

 

149

  

 

 

Principal and selling stockholders

  

 

153

  

 

 

Description of capital stock

  

 

156

  

 

 

Shares eligible for future sale

  

 

160

  

 

 

Material U.S. federal income and estate tax considerations for non-U.S. holders of common stock

  

 

163

  

 

 

Underwriting

  

 

167

  

 

 

Legal matters

  

 

174

  

 

 

Experts

  

 

174

  

 

 

Where you can find more information

  

 

174

  

 

 

Index to financial statements

  

 

F-1

  

 

 

We, the selling stockholder and the underwriters have not authorized anyone to provide you with any information other than that contained in this prospectus, any amendment or supplement to this prospectus or in any free writing prospectus we may authorize to be delivered or made available to you. We, the selling stockholder and the underwriters take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. We and the selling stockholder are offering to sell, and seeking offers to buy, shares of our common stock only in jurisdictions where offers and sales are permitted. The information contained in this prospectus is accurate only as of the date of this prospectus, regardless of the time of delivery of this prospectus or any sale of shares of our common stock. Our business, financial condition, results of operations and prospects may have changed since that date.

For investors outside the United States: We, the selling stockholder and the underwriters have not done anything that would permit this offering or possession or distribution of this prospectus in any jurisdiction where action for that purpose is required, other than in the United States. Persons outside the United States who come into possession of this prospectus must inform themselves about, and observe any restrictions relating to, the offering of the shares of common stock and the distribution of this prospectus outside the United States.
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