1 SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report: November 18, 1997 Commission File No. 0-27352 ------------------ ------- (Date of earliest event reported) HYBRIDON, INC. -------------- (Exact name of registrant as specified in its Charter) Delaware 04-3072298 -------- ---------- (State or other jurisdiction of (IRS Employer Identification No.) incorporation or organization) 620 Memorial Drive, Cambridge, Massachusetts 02139 - -------------------------------------------- ---------- (Address of principal executive offices) (Zip Code) (617) 528-7000 -------------- (Registrant's telephone number, including area code) 2 ITEM 5. OTHER EVENTS On November 18, 1997, Hybridon, Inc. (the "Company") issued a press release announcing that the Company plans to commence a private offering of shares of its common stock, $.001 par value per share (the "Common Stock"), pursuant to which the Company intends to sell at one or more closings an aggregate of up to $50.0 million of its Common Stock (with a minimum first closing of at least $12.5 million). A copy of the release has been filed with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference. ITEM 7. EXHIBITS 99.1 Press release dated November 18, 1997. 3 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: November 19, 1997 HYBRIDON, INC. /s/ E. Andrews Grinstead, III --------------------------------------- E. Andrews Grinstead, III Chairman, President and Chief Executive Officer 4 INDEX TO EXHIBITS EXHIBIT NO. DESCRIPTION - ------- ----------- 99.1 Press release dated November 18, 1997.