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SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Information statement pursuant to Rule 13d-1 and 13d-2 (Amendment No. )* Hybridon, Inc. - -------------------------------------------------------------------------------- (Name of issuer) Common Stock** - -------------------------------------------------------------------------------- (Title of class of securities) 44860M801 - -------------------------------------------------------------------------------- (CUSIP number) * The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). ** We hold securities convertible into common stock. 1 SCHEDULE 13G - -------------------------------- CUSIP NO. 44860M801 13G - -------------------------------- - --------- ---------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS Pecks Management Partners, Ltd. 11-3015963 - --------- ---------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] Not Applicable - --------- ---------------------------------------------------------------------- 3 SEC USE ONLY - --------- ---------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION New York - ---------------------- ------ -------------------------------------------------- 5 SOLE VOTING POWER 356,500 shares NUMBER OF ------ ------------------------------------------------- SHARES BENEFICIALLY OWNED BY 6 SHARED VOTING POWER None EACH ------ ------------------------------------------------- REPORTING PERSON WITH 7 SOLE DISPOSITIVE POWER 356,500 shares ------ ------------------------------------------------- 8 SHARED DISPOSITIVE POWER None - --------- ---------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 356,500 shares - --------- ---------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* Not Applicable - --------- ---------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.6% - --------- ---------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IA - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! 2 - -------------------------------------------------------------------------------- PECKS MANAGEMENT PARTNERS LTD. - -------------------------------------------------------------------------------- Item 1a. Hybridon, Inc. Item 1b 620 Memorial Drive Cambridge, MA 02139 Item 2a Pecks Management Partners Ltd. Item 2b One Rockefeller Plaza, Suite 900 New York, NY 10020 Item 2c New York Item 2d Common Stock* * We hold securities convertible into Common Stock Item 2e Cusip: 44860M801 Item 3e Investment Adviser Registered under Section 203 of the Investment Advisers Act of 1940 Item 4 a 356,500 shares b 6.6% c (i) 356,500 (ii) None (iii) 356,500 (iv) None Item 5 Inapplicable Item 6 Shares as to which this schedule is filed are owned by seven investment advisory clients of the person filing this schedule, which clients receive dividends and the proceeds from the sale of such shares. None of the clients are known to have such interest with respect to more than 5% of the class. Items 7-9 Inapplicable Item 10 "By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purpose or effect." After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth is true, complete and correct. January 27, 1998 /s/ Arthur W. Berry ------------------------------ Arthur W. Berry Managing Director 3