<PAGE> 1
As filed with the Securities and Exchange Commission on July 25, 1997
Registration No. 333-28409
================================================================================
SECURITIES AND EXCHANGE COMMISSION
Washington, D. C. 20549
POST-EFFECTIVE AMENDMENT NO. 1
to
FORM S-3
REGISTRATION STATEMENT UNDER
THE SECURITIES ACT OF 1933
HYBRIDON, INC.
(Exact name of registrant as specified in its charter)
DELAWARE 04-3072298
(State or other jurisdiction of (I.R.S. Employer
incorporation or organization) Identification Number)
-----------------------------------------------
620 MEMORIAL DRIVE
CAMBRIDGE, MASSACHUSETTS 02139
(617) 528-7000
(Address Including Zip Code and Telephone Number,
Including Area Code, of Registrant's Principal Executive Offices)
-----------------------------------------------
E. ANDREWS GRINSTEAD, III
CHAIRMAN, PRESIDENT AND CHIEF EXECUTIVE OFFICER
HYBRIDON, INC.
620 MEMORIAL DRIVE
CAMBRIDGE, MASSACHUSETTS 02139
(617) 528-7000
(Name, Address Including Zip Code and Telephone
Number, Including Area Code, of Agent for Service)
Copy to:
DAVID E. REDLICK, ESQ.
HALE AND DORR LLP
60 STATE STREET
BOSTON, MASSACHUSETTS 02109
TELEPHONE: (617) 526-6000
TELECOPY: (617) 526-5000
-----------------------------------------------
Date of commencement of sale to the public: Not applicable.
If the only securities being registered on this Form S-3 are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]
If any of the securities being registered on this Form S-3 are to be
offered on a delayed or continuous basis pursuant to Rule 415 under the
Securities Act of 1933, other than securities offered only in connection with
dividend or interest reinvestment plans, check the following box. [X]
If this Form S-3 is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please 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 S-3 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 number of the earlier effective registration statement for the
same offering. [ ]
If delivery of the Form S-3 prospectus is expected to be made pursuant to
Rule 434, please check the following box. [ ]
================================================================================
<PAGE> 2
Pursuant to a Registration Statement on Form S-3 (File No. 333-28409) filed
with the Securities and Exchange Commission on June 3, 1997 (the "Registration
Statement"), Hybridon, Inc., a Delaware corporation (the "Registrant"),
registered under the Securities Act of 1933, as amended (the "Act"), a total of
5,000,000 shares of common stock, $.001 par value per share, of the Company (the
"Registered Shares").
On July 24, 1997, the Registrant terminated the offering of the Registered
Shares pursuant to the Registration Statement. As of such date, the Registrant
had not sold any of the Registered Shares pursuant to the Registration
Statement.
Accordingly, this Post Effective Amendment No. 1 to the Registration
Statement is being filed solely for the purpose of removing from registration
all of the Registered Shares.
Pursuant to Rule 478 promulgated under the Act, the Registrant has duly
caused this Post-Effective Amendment No. 1 to be signed on its behalf by the
undersigned, thereto duly authorized, in the City of Cambridge, Commonwealth of
Massachusetts, on this 24th day of July, 1997.
HYBRIDON, INC.
By: /s/ E. Andrews Grinstead, III
-----------------------------------
E. Andrews Grinstead, III
Chairman, President and
Chief Executive Officer
