As filed with the Securities and Exchange Commission on July 11, 2018
Registration Statement
No. 333-225140
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Post-Effective
Amendment No. 1
to
FORM
S-1
REGISTRATION STATEMENT
Under
THE
SECURITIES ACT OF 1933
SELLAS Life Sciences Group, Inc.
(Exact name of registrant as specified in its charter)
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Delaware
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2834
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20-8099512
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(State or other jurisdiction of
incorporation or organization)
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(Primary Standard Industrial
Classification Code Number)
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(I.R.S. Employer
Identification Number)
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315 Madison Avenue, 4th Floor
New York, NY 10017
(917)
438-4353
(Address, including zip code, and telephone number, including area code, of registrants principal executive offices)
Angelos M. Stergiou, M.D., Sc.D., h.c.
President and Chief Executive Officer
SELLAS Life Sciences Group, Inc.
315 Madison Avenue, 4th Floor
New York, NY 10017
(917)
438-4353
(Name, address, including zip code, and telephone number, including area code, of agent for service)
Copies to:
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Yvan-Claude Pierre, Esq.
Marianne Sarrazin, Esq.
Cooley LLP
1114 Avenue
of the Americas
New York, NY 10036
Tel: (212)
479-6000
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Barbara Wood, Esq.
Executive Vice President, General
Counsel & Secretary
SELLAS Life Sciences Group, Inc.
315 Madison Avenue, 4th Floor
New York, NY 10017
Tel:
(917)
438-4353
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Glenn R. Pollner, Esq.
Gibson, Dunn & Crutcher LLP
200 Park Avenue
New
York, NY 10166
Tel: (212)
351-4000
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Approximate date of commencement of proposed sale to public:
As soon as practicable after this Registration Statement is declared effective.
If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933,
check the following box. ☒
If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the
Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐
If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement for the same offering. ☐
If this Form is a post-effective
amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☒
(333-225140)
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a
non-accelerated
filer, a smaller reporting company or emerging growth company. See the definitions of large accelerated filer, accelerated filer, smaller reporting company,
and emerging growth company in Rule
12b-2
of the Exchange Act.
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Large accelerated filer
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☐
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Accelerated filer
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☐
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Non-accelerated filer
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☐ (Do not check if a smaller reporting company)
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Smaller reporting company
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☒
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Emerging growth company
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☐
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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 7(a)(2)(B) of the Securities Act. ☐
The Registration Statement shall become effective upon filing in accordance with Rule 462(d) promulgated under the Securities Act of 1933, as amended.