1
                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                    FORM 10-Q

                     QUARTERLY REPORT PURSUANT TO SECTION 13
                 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

                                     -------


For the Quarterly Period Ended:                                  0-27352
      September 30, 1997                                 Commission File Number


                                 HYBRIDON, INC.
             ------------------------------------------------------
             (Exact name of registrant as specified in its charter)


           DELAWARE                                           04-3072298
(State or other jurisdiction of                            (I.R.S. Employer
organization or incorporation)                          Identification Number)

                               620 MEMORIAL DRIVE
                               CAMBRIDGE, MA 02139
          ------------------------------------------------------------
          (Address of principal executive offices, including zip code)


                                 (617) 528-7000
              ----------------------------------------------------
              (Registrant's telephone number, including area code)


Indicate by check mark whether the registrant (1) has filed all reports to be
filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the
preceding 12 months (or for such shorter period that the registrant was required
to file such reports), and (2) has been subject to such filing requirements for
the past 90 days.

                          YES   X      NO
                               ---        ---

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date.

Common Stock, Par Value $.001 Per Share                   25,292,252
- ---------------------------------------                   ----------
                 Class                       Outstanding as of October 31, 1997


   2



                                 HYBRIDON, INC.

                                    FORM 10-Q

                                      INDEX


PART I - FINANCIAL INFORMATION

ITEM 1 - FINANCIAL STATEMENTS

         CONSOLIDATED CONDENSED BALANCE SHEETS AS OF SEPTEMBER 30, 1997 AND
            DECEMBER 31, 1996

         CONSOLIDATED CONDENSED STATEMENT OF OPERATIONS FOR THE THREE AND NINE
            MONTHS ENDED SEPTEMBER 30, 1997 AND 1996 AND CUMULATIVE FROM MAY 25,
            1989 (INCEPTION) TO SEPTEMBER 30, 1997

         CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS FOR THE NINE MONTHS
            ENDED SEPTEMBER 30, 1997 AND 1996, AND CUMULATIVE FROM MAY 25,
            1989 (INCEPTION) TO SEPTEMBER 30, 1997

         NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS


ITEM 2 - MANAGEMENT'S DISCUSSION AND ANALYSIS OF
            FINANCIAL CONDITION AND RESULTS OF OPERATIONS

PART II - OTHER INFORMATION

ITEM 5 - OTHER INFORMATION

ITEM 6 - EXHIBITS AND REPORTS ON FORM 8-K

SIGNATURES


   3



                         HYBRIDON, INC. AND SUBSIDIARIES
                          (A DEVELOPMENT STAGE COMPANY)

                      CONSOLIDATED CONDENSED BALANCE SHEETS

                                   (UNAUDITED)






                                     ASSETS
                                                                                 SEPTEMBER 30,      DECEMBER 31,
                                                                                      1997              1996
                                                                                 -------------     -------------
                                                                                             

CURRENT ASSETS:
   Cash and cash equivalents                                                     $   5,892,967     $  12,633,742
   Short-term investments                                                            8,898,715         3,785,146
   Accounts receivable                                                                 297,351           573,896
   Prepaid expenses and other current assets                                         1,956,043         1,545,324
                                                                                 -------------     -------------

         Total current assets                                                       17,045,076        18,538,108
                                                                                 -------------     -------------

PROPERTY AND EQUIPMENT, AT COST:
   Leasehold improvements                                                           14,266,008         9,257,516
   Laboratory equipment                                                              6,681,385         5,884,861
   Equipment under capital leases                                                    5,371,707         2,904,688
   Office equipment                                                                  1,785,376         1,496,639
   Furniture and fixtures                                                              684,595           499,958
   Construction-in-progress                                                          1,176,785         2,193,400
                                                                                 -------------     -------------
                                                                                    29,965,856        22,237,062

   Less--Accumulated depreciation and amortization                                  10,678,014         6,596,294
                                                                                 -------------     -------------
                                                                                    19,287,842        15,640,768
                                                                                 -------------     -------------

OTHER ASSETS:
   Restricted cash                                                                   1,326,840           437,714
   Notes receivable from officers                                                      262,026           317,978
   Deferred financing costs and other assets                                         3,230,945         1,152,034
   Investment in real estate partnership                                             5,450,000         5,450,000
                                                                                 -------------     -------------

                                                                                    10,269,811         7,357,726
                                                                                 -------------     -------------

                                                                                 $  46,602,729     $  41,536,602
                                                                                 =============     =============

                 LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)

CURRENT LIABILITIES:
   Current portion of long-term debt and capital lease obligations               $   8,062,535     $   1,308,511
   Accounts payable                                                                  4,476,576         4,064,419
   Accrued expenses                                                                  7,128,573         4,190,766
   Deferred revenue                                                                         --            86,250
                                                                                 -------------     -------------
         Total current liabilities                                                  19,667,684         9,649,946
                                                                                 -------------     -------------

LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS, NET OF CURRENT PORTION                 3,556,763         9,031,852
                                                                                 -------------     -------------
CONVERTIBLE SUBORDINATED NOTES PAYABLE                                              50,000,000                --
                                                                                 -------------     -------------

STOCKHOLDERS' EQUITY(DEFICIT):
   Preferred stock, $.01 par value-
     Authorized--5,000,000 shares
     Issued and outstanding--None                                                           --                --
   Common stock, $.001 par value-
     Authorized--100,000,000 shares
     Issued and outstanding--25,292,252 shares at September 30, 1997, and
       25,146,577 shares at December 31, 1996 respectively                              25,292            25,147
   Additional paid-in capital                                                      173,672,464       173,227,358
   Deficit accumulated during the development stage                               (199,171,091)     (149,193,775)
   Deferred Compensation                                                            (1,148,383)       (1,203,926)
                                                                                 -------------     -------------
         Total stockholders' equity(deficit)                                       (26,621,718)       22,854,804
                                                                                 -------------     -------------

                                                                                 $  46,602,729     $  41,536,602
                                                                                 =============     =============




The accompanying notes are an integral part of these consolidated condensed
financial statements.

   4


                         HYBRIDON, INC. AND SUBSIDIARIES
                          (A DEVELOPMENT STAGE COMPANY)

                 CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS

                                   (UNAUDITED)





                                                                                                       CUMULATIVE FROM
                                                                                                        MAY 25, 1989
                                        THREE MONTHS ENDED                  NINE MONTHS ENDED          (INCEPTION) TO
                                           SEPTEMBER 30,                       SEPTEMBER 30,            SEPTEMBER 30,
                                       1997             1996              1997              1996            1997
                                                                                         

REVENUES:
  Research and development         $    200,000     $    358,750      $    980,150      $  1,076,250    $   5,534,413
  Product revenue                       155,368          611,520         1,231,226           611,520        2,311,401
  Interest income                       294,246          560,376           898,160         1,195,871        3,039,777
  Royalty and other income               18,247               --            33,218            62,321           95,539
                                   ------------     ------------      ------------      ------------    -------------

                                        667,861        1,530,646         3,142,754         2,945,962       10,981,130
                                   ------------     ------------      ------------      ------------    -------------

OPERATING EXPENSES:
   Research and development          11,338,913       10,242,296        37,784,718        27,326,434      156,416,618
   General and administrative         3,057,380        2,766,429         9,011,879         7,989,722       45,801,747
   Restructuring charge               3,100,000               --         3,100,000                --        3,100,000
   Interest                           1,605,918           18,070         3,223,473            87,651        4,833,856
                                   ------------     ------------      ------------      ------------    -------------

                                     19,102,211       13,026,795        53,120,070        35,403,807      210,152,221
                                   ------------     ------------      ------------      ------------    -------------

         Net loss                  $(18,434,350)    $(11,496,149)     $(49,977,316)     $(32,457,845)   $(199,171,091)
                                   ------------     ------------      ------------      ------------    -------------

NET LOSS PER COMMON SHARE
(Note 2)                           $       (.73)    $       (.45)     $      (1.98)     $      (1.35)
                                   ============     ============      ============      ============


SHARES USED IN COMPUTING NET
LOSS PER COMMON SHARE (Note 2)       25,277,563       25,732,987        25,234,031        23,989,439
                                   ============     ============      ============      ============




The accompanying notes are an integral part of these consolidated condensed
financial statements


   5



                         HYBRIDON, INC. AND SUBSIDIARIES
                          (A DEVELOPMENT STAGE COMPANY)

                 CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS

                                   (UNAUDITED)



                                                                                                      CUMULATIVE FROM
                                                                                                        MAY 25,1989
                                                                             NINE MONTHS ENDED         (INCEPTION) TO
                                                                               SEPTEMBER 30,            SEPTEMBER 30,
                                                                          1997              1996             1997
                                                                                               

CASH FLOWS FROM OPERATING ACTIVITIES:
   Net loss                                                           $(49,977,316)     $(32,457,845)   $(199,171,091)
   Adjustments to reconcile net loss to net cash used in
   operating activities-
     Depreciation and amortization                                       4,081,720         1,626,080       10,779,455
     Issuance of common  stock for services rendered                       146,875                --          146,875
     Compensation on grant of stock options, warrants and                  261,519                --        8,069,250
       restricted stock
     Amortization of discount on convertible promissory notes                   --                --          690,157
       payable
     Amortization of deferred financing costs                              358,904                --          575,636
     Noncash interest on convertible promissory notes payable                   --                --          260,799
     Write-down of assets related to restructuring                         331,000                            331,000
     Changes in operating assets and liabilities-
       Accounts receivable                                                 276,545                --         (297,350)
       Prepaid and other current assets                                   (541,718)       (1,427,049)      (2,087,042)
       Notes receivable from officers                                       55,952            (7,371)        (262,026)
       Amounts payable to related parties                                       --            21,500         (200,000)
       Accounts payable and accrued expenses                             3,349,962           756,899       11,605,147
       Deferred revenue                                                    (86,250)               --               --
                                                                      ------------      ------------    -------------

              Net cash used in operating activities                    (41,742,807)      (31,487,786)    (169,559,190)
                                                                      ------------      ------------    -------------

CASH FLOWS FROM INVESTING ACTIVITIES:
   Increase in short-term investments                                   (5,113,569)      (11,063,626)      (8,898,715)
   Purchases of property and equipment, net                             (6,645,439)       (7,576,520)     (28,448,149)
   Decrease (increase)  in restricted cash and other assets               (626,985)          418,118       (2,291,168)
   Investment in real estate partnership                                        --        (3,751,552)      (5,450,000)
                                                                      ------------      ------------    -------------

              Net cash used in investing activities                    (12,385,993)      (21,973,580)     (45,088,032)
                                                                      ------------      ------------    -------------

CASH FLOWS FROM FINANCING ACTIVITIES:
   Proceeds from issuance of convertible preferred stock                        --                --       96,584,154
   Proceeds from issuance of common stock related to stock                  83,327           598,676        1,257,929
     options and restricted stock grants
   Proceeds from issuance of common stock related to stock                   9,075         1,539,386        3,185,816
     warrants
   Net proceeds from issuance of common stock                                   --        52,231,244       52,355,324
   Repurchase of common stock                                                   --                --             (263)
   Proceeds from notes payable                                                  --                --        9,450,000
   Proceeds from issuance of convertible promissory notes payable       50,000,000                --       59,191,744
   Proceeds from long-term debt                                                 --                --          662,107
   Payments on long-term debt and capital leases                        (1,169,656)         (351,849)      (2,971,268)
   Proceeds from sale/leaseback                                          1,165,236                --        3,960,752
   (Increase) decrease in deferred financing costs                      (2,699,957)          526,721       (3,136,106)
                                                                      ------------      ------------    -------------

              Net cash provided by financing activities                 47,388,025        54,544,178      220,540,189
                                                                      ------------      ------------    -------------

NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS                    (6,740,775)        1,082,812        5,892,967

CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD                          12,633,742         5,284,262               --
                                                                      ------------      ------------    -------------

CASH AND CASH EQUIVALENTS, END OF PERIOD                              $  5,892,967      $  6,367,074    $   5,892,967
                                                                      ============      ============    =============

SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
   Cash paid for interest                                             $    786,005      $     87,651    $   2,396,388
                                                                      ============      ============    =============



The accompanying notes are an integral part of these consolidated condensed
financial statements.


   6


                         HYBRIDON, INC. AND SUBSIDIARIES
                          (A DEVELOPMENT STAGE COMPANY)

              NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS

                                   (UNAUDITED)


(1)    ORGANIZATION

       Hybridon, Inc. (the Company) was incorporated in the State of Delaware on
       May 25, 1989. The Company is engaged in the discovery and development of
       novel genetic medicines based primarily on antisense technology.

       The Company is in the development stage. Since inception, the Company has
       been engaged primarily in research and development efforts, development
       of its manufacturing capabilities and organizational efforts, including
       recruiting of scientific and management personnel and raising capital. To
       date, the Company has not received revenue from the sale of
       biopharmaceutical products developed by it based on antisense technology.
       In order to commercialize its own products, the Company will need to
       address a number of technological challenges and comply with
       comprehensive regulatory requirements. Accordingly, it is not possible to
       predict the amount of funds that will be required or the length of time
       that will pass before the Company receives revenues from sales of any of
       these products. All revenues received by the Company to date have been
       derived from collaboration agreements, interest on investment funds and
       revenues from the custom contract manufacturing of synthetic DNA and
       reagent products by the Company's Hybridon Specialty Products Division.
       As a result, although the Company has begun to generate revenues from its
       contract manufacturing business, the Company is dependent on the proceeds
       from possible future sales of equity securities, debt financings and
       research and development collaborations in order to fund future
       operations. Based on its current operating plan, the Company believes
       that its existing resources, together with committed collaborative
       research payments, the Company will have sufficient capital requirements
       to fund its operations into December 1997. As noted, the Company will
       require substantial additional funding to enable the Company to continue
       operations beyond such time.

       The unaudited consolidated condensed financial statements included herein
       have been prepared by the Company, without audit, pursuant to the rules
       and regulations of the Securities and Exchange Commission and include, in
       the opinion of management, all adjustments, consisting of normal,
       recurring adjustments, necessary for a fair presentation of interim
       period results. Certain information and footnote disclosures normally
       included in financial statements prepared in accordance with generally
       accepted accounting principles have been condensed or omitted pursuant to
       such rules and regulations. The Company believes, however, that its
       disclosures are adequate to make the information presented not
       misleading. The results for the interim periods presented are not
       necessarily indicative of results to be expected for the full fiscal
       year. It is suggested that these financial statements be read in
       conjunction with the audited consolidated financial statements and notes
       thereto included in the Company's Annual Report on Form 10-K for the year
       ended December 31, 1996, as filed with the Securities and Exchange
       Commission.

   7

(2)    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

       Net Loss per Common Share

       Net loss per common share is computed using the weighted average number
       of shares of common stock outstanding during the period. Pursuant to the
       requirements of the Securities and Exchange Commission, common stock
       issued by the Company during the 12 months immediately preceding its
       initial public offering, plus shares of common stock that became issuable
       during the same period pursuant to the grant of common stock options and
       preferred and common stock warrants, has been included in the calculation
       of weighted average number of shares outstanding for the period from
       January 1, 1996 through February 2, 1996 (using the treasury-stock method
       and the initial public offering price of $10 per share). In addition, the
       calculation of the weighted average number of shares outstanding includes
       shares of common stock as if all shares of preferred stock were converted
       into common stock on the respective original dates of issuance.

(3)    CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS

       The Company applies Statement of Financial Accounting Standards (SFAS)
       No. 115, Accounting for Certain Investments in Debt and Equity
       Securities. Accordingly, the Company has classified its cash equivalents
       and short-term investments as held-to-maturity, and has recorded them at
       amortized cost, which approximates market value. Short-term investments
       mature within one year of the balance sheet date. Cash equivalents have
       original maturities of less than three months. Cash and cash equivalents
       and short-term investments at September 30, 1997 and December 31, 1996
       consisted of the following:



                                                               SEPTEMBER 30,       DECEMBER 31,
                                                                   1997                1996
                                                                             

        Cash and cash equivalents-
           Cash and money market funds                           $5,892,967         $10,144,367
           U.S. government securities                                    --           2,489,375
                                                                 ----------         -----------

                                                                 $5,892,967         $12,633,742
                                                                 ==========         ===========

        Short-term investments-
           U.S. government securities                            $       --         $ 3,785,146
           Commercial paper and certificates of deposit           8,898,715                  --
                                                                 ----------         -----------

                                                                 $8,898,715         $ 3,785,146
                                                                 ==========         ===========



(4)    CONVERTIBLE SUBORDINATED NOTES PAYABLE

       On April 2, 1997, the Company issued $50,000,000 of 9% convertible
       subordinated notes (the Notes). Under the terms of the Notes, the Company
       must make semi-annual interest payments on the outstanding principal
       balance through the maturity date of April 1, 2004. If the Notes are
       converted prior to April 1, 2000, the Noteholders are entitled to receive
       accrued interest from the date of the most recent interest payment
       through the conversion date. The Notes are subordinate to substantially
       all of the Company's existing indebtedness. The Notes are convertible at
       any time prior to the maturity date at a conversion price equal to
       $7.0125 per share, subject to adjustment under certain circumstances, as
       defined.

   8

       Beginning April 1, 2000, the Company may redeem the Notes at its option
       for a 4.5% premium over the original issuance price, provided that from
       April 1, 2000 to March 31, 2001, the Notes may not be redeemed unless the
       closing price of the common stock equals or exceeds 150% of the
       conversion price for a period of at least 20 out of 30 consecutive
       trading days and the Notes redeemed within 60 days after such trading
       period. The premium decreases by 1.5% each year through March 31, 2003.
       Upon a change of control of the Company, as defined, the Company will be
       required to offer to repurchase the Notes at 150% of the original
       issuance price.

(5)    NEW ACCOUNTING STANDARDS

       On March 31, 1997, the Financial Accounting Standards Board (FASB) issued
       SFAS No. 128, Earnings per Share. SFAS No. 128 establishes standards for
       computing and presenting earnings per share and applies to entities with
       publicly held common stock or potential common stock. SFAS No. 128 is
       effective for fiscal years ending after December 15, 1997 and early
       adoption is not permitted. When adopted by the Company, SFAS No. 128 will
       require restatement of prior years' earnings per share. The Company will
       adopt SFAS No. 128 for its fiscal year ended December 31, 1997. The
       Company believes that the adoption of SFAS No. 128 will not have a
       material effect on its financial statements.

       In June 1997, the FASB issued SFAS No. 130, Reporting Comprehensive
       Income. SFAS No. 130 requires disclosure of all components of
       comprehensive income on an annual basis and interim basis. Comprehensive
       income is defined as the change in equity of a business enterprise during
       a period from transactions and other events and circumstances from
       nonowner sources. SFAS No. 130 is effective for fiscal years beginning
       after December 15, 1997.

       In July 1997, the FASB issued SFAS No. 131, Disclosures About Segments of
       an Enterprise and Related Information. SFAS No. 131 requires certain
       financial and supplementary information to be disclosed on an annual and
       interim basis for each reportable segment of an enterprise. SFAS No. 131
       is effective for fiscal years beginning after December 15, 1997. Unless
       impracticable, companies would be required to restate prior period
       information upon adoption.

(6)    RESTRUCTURING

       In July and August 1997 the Company implemented a restructuring plan to
       reduce expenditures on a phased basis over the balance of 1997 in an
       effort to conserve its cash resources. As part of this restructuring
       plan, in addition to stopping the clinical development of GEM 91, the
       Company's first generation antisense drug for the treatment of AIDS and
       HIV the Company reduced or suspended selected programs unrelated to its
       core drug development programs involving four second generation antisense
       compounds based on the Company's proprietary mixed backbone chemistries.
       To begin the implementation of these changes the Company terminated the
       employment of 34 employees at its Cambridge and Milford, Massachusetts
       facilities in July 1997 and substantially reduced operations at its
       Paris, France office and terminated 10 employees at that location in
       August 1997. 

       Also, in connection with the restructuring the Company entered into two
       different sub-leasing arrangements. The Company has sub-leased one
       facility in Cambridge, MA and a portion of its corporate headquarters
       located at 620 Memorial Drive, Cambridge, MA. The Company incurred
       expenses relating to these sub-leases for broker fees and renovation
       expenses incurred in preparing the Memorial Drive space for the new
       tenant. In addition, the Company plans to sub-lease its office in Paris,
       France and has accrued the remaining lease payments net of anticipated
       sub-lease income.

       The Company is continuing to review its expenditure rate and implement
       additional measures to conserve its cash resources. See Note 9(a).


   9


       Because of the significant costs involved in terminating employees and
       substantially reducing operations at its Paris, France office, the
       Company does not expect its expenditure rate to materially decrease
       until at least October 1997. The following are the significant components
       of the charge for restructuring:


                                                                 

        Employee severance, benefits and related costs              $2,214,000
        Development programs terminated                                356,000
        Facility costs                                                 330,000
        Writedown of assets to net realizable value                    200,000
                                                                    ----------

                                                                    $3,100,000
                                                                    ==========


       The total cash impact of the restructuring amounted to approximately $2.7
       million. The total cash paid as of September 30, 1997 was approximately
       $500,000 and the remaining amount of approximately $2.2 million will be
       paid through the first quarter of 1998.

(7)    NOTE PAYABLE TO A BANK

       The note payable to Silicon Valley Bank (the "Bank") contains certain
       financial covenants that require the Company to maintain minimum tangible
       net worth (as defined) and minimum liquidity (as defined) and prohibits
       the payment of dividends. The Company has secured the obligations under
       the note with a lien on all of its assets. If, at specified times, the
       Company's minimum liquidity is less than $15,000,000, $10,000,000, or
       $5,000,000, the Company is required to pledge cash collateral to the bank
       equal to 25%, 50% or 100%, respectively, of the then outstanding balance
       under the note, pursuant to a cash pledge agreement. The notes also
       contain certain non-financial covenants. As of September 30, 1997, the
       Company's minimum liquidity had fallen below $15,000,000 and subsequent
       to September 30, 1997 the Company pledged cash collateral to the bank of
       $1,750,000. If the Company does not obtain additional financing by the
       end of November, the Company's minimum liquidity as of November 30, 1997
       may be less than $5,000,000 and the balance of the note will need to be
       pledged by December 31, 1997. The Company has classified the entire
       balance as a current liability in the accompanying September 30, 1997
       balance sheet as it does not currently have the financing to remain in
       compliance with the financial covenants as of November 19, 1997 (see
       Note 9(c)). Failure by the Company to pledge cash collateral when
       required would result in a default under the Company's credit facility
       with the bank.

(8)    RESTRICTED CASH

       In November 1997 the Company was notified by Bank Fur Vermogensanlagen
       Und Handel AG ("BVH") that the Federal Banking Supervisory Office
       ("BAKred") in Germany had imposed a moratorium, effective as of August
       19, 1997 on BVH and had closed BVH for business. Accordingly, the Company
       classified its $1,021,000 deposit with BVH as restricted at September 30,
       1997. The Company has contacted BVH and is actively pursuing the release
       of its deposit or sale of the deposit to a third party, including
       possibly an entity affiliated with a director of the Company. The Company
       expects to recover substantially all of its deposit in BVH through such
       means. However, the timing of the recovery may be over a period of up to
       one year. There can be no assurance that the Company will be able to
       recover any or all of its deposit or that the Company will not be
       required to write off all or a portion of the $1,021,000.

(9)    SUBSEQUENT EVENTS

       a) Additional Restructuring

       In November 1997, the Company implemented an additional restructuring
       plan by reducing the number of employees in its Cambridge and Milford,
       Massachusetts facilities by approximately 50 employees. The Company
       estimates that the restructuring charge with respect to such reductions,
       which will be taken in the fourth quarter of 1997, will total between
       approximately $1.5 million and $2.0 million, and expects that it will
       make the associated cash payments through the first quarter of 1998.

       b) NASDAQ Delisting

       On September 19, 1997, the Company received a notice of delisting from
       the Nasdaq Stock Market, Inc. ("NASDAQ") indicating that because the
       Company was not in compliance with the continued listing requirements of
       the Nasdaq National Market, the Company's Common Stock would be delisted
       from the Nasdaq National Market. The Company appealed the decision with
       NASDAQ and a hearing was held on November 6, 1997. On November 17, 1997,
       NASDAQ informed the Company that the Company's Common Stock would not be
       delisted and would continue to trade on the Nasdaq National Market,
       subject to certain specified conditions, including (i) the closing of a
       minimum $12,000,000 from the Private Offering on or before December 1,
       1997, (ii) the closing of an additional minimum $20,000,000 from the
       Private Offering on or before January 2, 1998, (iii) the closing of      
       certain corporate transactions on or before January 2, 1998, and (iv)
       the filing of a report on or before January 2, 1998 evidencing that the
       Company had a minimum of $12,000,000 in net tangible assets as of
       November 30, 1997, with pro forma adjustments for any transactions
       occurring prior to the filing of such report. The Company is seeking
       clarification with respect to certain of these conditions. There can be
       no assurance that the Company will be able to satisfy one or more of
       these conditions and that the Company's Common Stock will continue to be 
       listed on the Nasdaq National Market.
        
       c) Private Offering of Equity Securities

       The Company has entered into a letter of intent with a placement agent
       related to a proposed "best efforts" private offering (the "Private
       Offering") by the placement agent on behalf of the Company of shares of
       the Company's Common Stock pursuant to which the Company is seeking to
       sell at one or more closing s up to $50.0 million of its Common Stock
       (with a minimum first closing of $12.5 million). If the Private Offering
       is consummated as contemplated by the letter of intent, the Common Stock
       to be issued and sold in the Private Offering will be offered and sold at
       all closings at an effective price per share equal to the lowest of (i)
       $1.25 per shares, (ii) 85% of the closing bid price of the Company's
       Common Stock at the time the Private Offering is commenced, (iii) the
       average closing bid price of the Company's Common Stock for the 30
       consecutive days immediately preceding any closing and (iv) the average
       closing bid price of the Company's Common Stock for the five consecutive
       trading days immediately preceding any closing. The letter of intent also
       contemplates that the purchasers of Common Stock sold in the Private
       Offering will be afforded significant contractual voting rights and other
       protective provisions. For example, if the average closing price of the
       Company's Common Stock for 20 consecutive trading days immediately
       preceding the first anniversary of the Final closing Date is less than
       125% of the offering price, the Company will be required to issue to the
       purchasers additional shares of Common Stock such that the value of their
       original investment, plus these newly issued shares, equals 125% of their
       original investment; provided that the Company will not be obligated in
       any event to issue at such time a number of shares in excess of the
       number of shares originally issued. The Company has agreed that the
       placement agent will serve as its exclusive agent for a period of up to
       120 days and that the Company will not engage in specified activities
       pending completion or termination of the Private Offering, subject to
       certain specified limitations.
   10


MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS


The Company is engaged in the discovery and development of genetic medicines
based primarily on antisense technology. The Company commenced operations in
February 1990 and since that time has been engaged primarily in research and
development efforts, development of its manufacturing capabilities and
organizational efforts, including recruitment of scientific and management
personnel and raising capital. To date, the Company has not received revenue
from the sale of biopharmaceutical products developed by it based on antisense
technology. In order to commercialize its own products, the Company will need to
address a number of technological challenges and comply with comprehensive
regulatory requirements. Accordingly, it is not possible to predict the amount
of funds that will be required or the length of time that will pass before the
Company receives revenues from sales of any of these products. All revenues
received by the Company to date have been derived from collaborative agreements,
interest on invested funds and revenues from the custom contract manufacturing
of synthetic DNA and reagent products by the Company's Hybridon Specialty
Products Division.

In July and August 1997 the Company implemented a restructuring plan to reduce
expenditures on a phased basis over the balance of 1997 in an effort to conserve
its cash resources. As part of this restructuring plan, in addition to stopping
the clinical development of GEM 91, the Company's first generation antisense
drug for the treatment of AIDS and HIV infection, the Company reduced or
suspended selected programs unrelated to its core drug development programs
involving four second generation antisense compounds based on the Company's
proprietary mixed backbone chemistries. To begin the implementation of these
changes the Company terminated the employment of 34 employees at its Cambridge
and Milford, Massachusetts facilities in July 1997 and substantially reduced
operations at its Paris, France office and terminated 10 employees at that
location in August 1997.

Also, in connection with the restructuring the Company entered into two
different sub-leasing arrangements. The Company has sub-leased one facility in
Cambridge, MA and a portion of its corporate headquarters located at 620
Memorial Drive, Cambridge, MA. The Company incurred expenses relating to these
sub-leases for broker fees and renovation expenses incurred in preparing the
Memorial Drive space for the new tenant. In addition, the Company plans to
sub-lease its office in Paris, France and has accrued the remaining lease
payments net of anticipated sub-lease income.

Because of the significant costs involved in terminating employees and
substantially reducing operations at its Paris, France office, the Company does
not expect its expenditure rate to materially decrease until at least October
1997. The Company recorded a restructuring charge of $3,100,000 from the actions
taken to date and will make the remaining associated cash payments through the 
first quarter of 1998.

In November 1997, the Company implemented an additional restructuring plan by
further reducing the number of employees in its Cambridge and Milford,
Massachusetts facilities by approximately 50 employees. The Company estimates
that the restructuring charge to be taken in the fourth quarter will total
between approximately $1.5 million and $2.0 million, and expects that it will
make the related cash payments through the first quarter of 1998.

The Company has incurred losses since its inception and, despite its
restructuring plan, expects to incur significant operating losses in the future.
The Company expects that its research and development expenses will continue to
be significant during the balance of 1997 and in future years as it pursues its
four core development programs. The Company has incurred cumulative losses from
inception through September 30, 1997 of approximately, $199,171,000.

This Quarterly Report on Form 10-Q contains forward-looking statements. For this
purpose, any statements contained herein that are not statements of historical
fact may be deemed to be forward-looking statements. Without limiting the
foregoing, the words "believes," "anticipates," "plans," "intends," "may," and
other similar expressions are intended to identify forward-looking statements.


   11

There are a number of important factors that could cause the Company's actual
results to differ materially from those indicated by such forward-looking
statements. These factors include the matters set forth under the heading
"Management's Discussion and Analysis of Financial Condition and Results of
Operations -- Certain Factors that May Affect Future Results" in the Company's
Annual Report on Form 10-K for the year ended December 31, 1996, which is hereby
incorporated herein by this reference. Any statement contained in such matters
shall be deemed to be modified or superseded for purposes of this Quarterly
Report on Form 10-Q to the extent that a statement contained herein modifies or
supersedes such statement. Moreover, there can be no assurance that the Company
will be able to successfully implement its restructuring plan or as to the
timing thereof.

RESULTS OF OPERATIONS

Three and Nine Months Ended September 30, 1997 and 1996

REVENUES

The Company had total revenues of $668,000 and $1,531,000 in the three months
ended September 30, 1997 and 1996, respectively, and $3,143,000 and $2,946,000
in the nine months ended September 30, 1997 and 1996, respectively.

Revenues from research and development collaborations were $200,000 and $359,000
for the three months ended September 30, 1997 and 1996, respectively, and
$980,000 and $1,076,000 for the nine months ended September, 1997 and 1996,
respectively. Revenues for the three months ended September 30, 1997 decreased
because the research funding, which the Company received under the Company's
research phase of a collaboration with F. Hoffmann-La Roche Ltd. ("Roche") was
terminated as of March 31, 1997 in connection with Roche's termination of the
research phase of the collaboration. On September 3, 1997 the Company
announced that it had received notification that Roche had decided not to pursue
further its antisense collaboration with Hybridon, and was terminating the
development phase of the collaboration effective February 28, 1998. During the
three and nine months ended September 30, 1997 and 1996, revenues also included
payments under the Company's collaboration with G. D. Searle & Co. (Searle).

Revenues from the custom contract manufacturing of synthetic DNA and reagent
products by the Hybridon Specialty Products Division ("HSPD") were $155,000 and
$1,231,000, respectively, for the three and nine months ended September 30,
1997. Revenues from the custom contract manufacturing of synthetic DNA and
reagent products by HSPD for the three and nine months ended September 30 were
$612,000. HSPD commenced operations in the third quarter of 1996. The decrease
in revenues for the three months ended September 30, 1997 was the result of a
decrease in orders due to the timing of customer requirements. The Specialty
Products Division currently has firm bookings of $800,000 which it anticipates
shipping in the three months ending December 31, 1997. There can be no assurance
however that such bookings will not be cancelled prior to shipping or that
shipping will occur in the three months ending December 31, 1997.

Interest income was $294,000 and $560,000 for the three months ended September
30, 1997 and 1996, respectively, and $898,000 and $1,196,000 for the nine months
ended September 30, 1997 and 1996, respectively. The decrease in interest income
in the three and nine months ended September 30, 1997 was the result of lower
cash balances in such periods than in the corresponding periods in 1996.

RESEARCH AND DEVELOPMENT EXPENSES

The Company had research and development expenses of $37,785,000 and $27,326,000
in the nine months ended September 30, 1997 and 1996, respectively. The increase
in research and development expenses for the nine months ended September 30,
1997 primarily reflected increased




   12
expenses related to ongoing clinical trials of the Company's product candidates,
including trials of GEM 91 (which were terminated in July of 1997), trials of
two different formulations of GEM 132 (an antisense compound for the treatment
of systemic CMV and CMV retinitis), which were first initiated with respect to
GEM 132 intravenous in Europe during the third quarter of 1996 and with respect
to GEM 132 intravitreal for the treatment of CMV retinitis in the United States
during the first quarter of 1997, and trials of the Company's second generation
GEM 92 product for the treatment of AIDS and HIV infection which were initiated
in Europe in 1997. The increase in research and development expenses for the
nine months ended September 30, 1997 also reflects an increase in preclinical
costs related to GEM 132, GEM 92 and the Company's GEM 231 product for the
treatment of solid tumors for which an Investigational New Drug application was
filed in November 1997 with respect to which the Company anticipates initiating
clinical trials for this product during the beginning of 1998. Significant
preclinical costs were incurred to meet the filing requirements to launch the
domestic clinical trials for GEM 132 intravitreal and systemic, and GEM 231.

The $11,339,000 in research and development expenses for the three months ended
September 30, 1997 is $1,097,000 higher than the corresponding quarter of 1996
and $3,630,000 lower than the research and development expenses reported for the
three months ended June 30, 1997. This decrease from the second quarter of 1997
is substantially due to the Company suspending development of GEM 91, its first
generation antisense drug for the treatment of AIDS and HIV infection and the
related restructuring efforts at the Company. All ongoing research and
development efforts related to GEM 91 at the Company and at all clinical sites
were suspended in July. Also, during July 1997 as part of the Company's
restructuring, approximately 24 research and development positions were
eliminated. As part of the restructuring all outside testing and consulting
arrangements were reviewed and where appropriate the terms were renegotiated or
the arrangements were cancelled. The Company does not anticipate that its
expenditure rate will materially decrease as a result of these measures until at
least October 1997.

GENERAL AND ADMINISTRATIVE EXPENSES

The Company had general and administrative expenses of $9,012,000 and $7,990,000
in the nine months ended September 30, 1997 and 1996, respectively. The increase
in general and administrative expenses for the nine months ended September 30,
1997 was attributable primarily to increased public relations and business
development costs as the Company continued to focus its efforts on obtaining
financing and strategic pharmaceutical collaborations. In addition, during the
nine months ended September 30, 1997 the increase was due to higher facilities
costs related to its Cambridge facility, certain financing activities which were
terminated during such period, and a one-time charge related to the Company's
investment in MethylGene, Inc., a Canadian company in which the Company owns a
minority interest.

The Company had general and administrative expenses of $3,057,000 and
$2,766,000 in the three months ended September 30, 1997 and 1996,
respectively. This increase is primarily due to the increase in facilities
costs and the termination of certain financing activities during the period. In
July 1997, as part of the restructuring, approximately  7  general and
administrative positions were eliminated. Also as part of the restructuring all
expenses including outside consulting, public relations, travel and
entertainment were reviewed and where appropriate eliminated or significantly
reduced.






   13

RESTRUCTURING CHARGE

In July and August 1997, the Company implemented a restructuring plan to reduce
expenditures on a phased basis over the balance of 1997 in an effort to conserve
its cash resources. As part of this restructuring plan, in addition to stopping
the clinical development of GEM 91, the Company reduced or suspended selected
programs unrelated to its four core programs. To begin the implementation of
these changes the Company terminated the employment of 34 employees at its
Cambridge and Milford, Massachusetts facilities in July 1997 and substantially
reduced operations at its Paris, France office and terminated 10 employees at
that location in August 1997. Because of the significant costs involved in
terminating employees and substantially reducing operations at its Paris, France
offices, the Company does not expect its expenditure rate to materially decrease
until at least October 1997. Also, in connection with the restructuring the
Company entered into two different sub-leasing arrangements. The Company has
sub-leased one facility in Cambridge, MA and a portion of its corporate
headquarters located at 620 Memorial Drive, Cambridge, MA. The Company incurred
expenses relating to these sub-leases for broker fees and renovation expenses
incurred in preparing the Memorial Drive space for the new tenant. In addition,
the Company plans to sub-lease its office in Paris, France and has accrued the
remaining lease payments net of anticipated sub-lease income. As a result of the
above actions the Company has recorded a restructuring charge of $3,100,000 in
the three and nine months ending September 30, 1997.

The Company is continuing to review its expenditure rate and implement
additional measures to conserve its cash resources. In November 1997, the
Company implemented an additional restructuring plan by reducing the number of
employees at its Cambridge and Milford, Massachusetts facilities by
approximately 50 employees. The Company estimates that the restructuring charges
taken in the fourth quarter of 1997 will range between $1,500,000 and
$2,000,000, and expects to make the related cash payments during the fourth
quarter of 1997 and through the first quarter of 1998.

INTEREST EXPENSE

The Company had interest expense of $1,606,000 and $18,000 in the three months
ended September 30, 1997 and 1996, respectively, and $3,223,000 and $88,000 in
the nine months ended September 30, 1997 and 1996, respectively. The increase in
interest expense for the three and nine months ended September 30, 1997
reflected an increase in the debt outstanding associated with the Company's
issuance of $50,000,000 of 9% Convertible Subordinated Notes (the"Notes") on
April 2, 1997 and interest incurred on borrowing to finance the purchase of
property and equipment, and leasehold improvements.

NET LOSS

As a result of the above factors, the Company incurred net losses of $18,434,000
and $11,496,000 for the three months ended September 30, 1997 and 1996,
respectively, and $49,977,000 and $32,458,000 for the nine months ended
September 30, 1997 and 1996, respectively.


LIQUIDITY AND CAPITAL RESOURCES

During the nine months ended September 30,1997, the Company used $41,743,000 of
net cash for




   14


operating activities, principally for ongoing research and development programs,
and $11,364,000 of net cash for investment in property and equipment, consisting
primarily of costs related to leasehold improvements, equipment and furnishings
of the Cambridge facility which the Company moved into on February 1, 1997.

The Company had cash, cash equivalents and short term investments of $14,792,000
at September 30, 1997. Based on its current operating plan, including the
expenditure rate reduction initiatives being undertaken by the Company as part
of its restructuring plan, the Company believes that its existing capital
resources, together with the committed collaborative research and development
payments from Searle, and anticipated sales of the Hybridon Specialty Products
Division and margins on such sales, will be adequate to fund the Company's
capital requirements into December 1997. The Company will require substantial
additional funds from external sources in the fourth quarter of 1997 to support
the Company's operations through the end of the fourth quarter of 1997 and
thereafter.

The Company is seeking additional equity, debt and lease financing to fund
future operations as well as additional collaborative development and
commercialization relationships with potential corporate partners in order to
fund certain of its programs. In particular, the Company is exploring selling
certain assets or business units to third parties or conducting a financing
which could be significantly dilutive to holders of the Company's existing
securities and contain certain terms that would adversely affect the rights of
holders of the Company's existing securities. 

In connection with these efforts, the Company has entered into a letter of
intent with a placement agent related to a proposed "best efforts" private
offering (the "Private Offering") by the placement agent on behalf of the
Company of shares of the Company's Common Stock pursuant to which the Company is
seeking to sell at one or more closings up to $50.0 million of its Common Stock
(with a minimum first closing of $12.5 million). If the Private Offering is
consummated as contemplated by the letter of intent, the Common Stock to be
issued and sold in the Private Offering will be offered and sold at all closings
at an effective price per share equal to the lowest of (i) $1.25 per share, (ii)
85% of the closing bid price of the Company's Common Stock at the time the
Private Offering is commenced, (iii) the average closing bid price of the
Company's Common Stock for the 30 consecutive trading days immediately preceding
any closing and (iv) the average closing bid price of the Company's Common Stock
for the five consecutive trading days immediately preceding any closing. The
letter of intent also contemplates that the purchasers of Common Stock sold in
the Private Offering will be afforded significant contractual voting rights and
other protective provisions. For example, if the average closing price of the
Company's Common Stock for 20 consecutive trading days immediately preceding the
first anniversary of the Final Closing Date is less than 125% of the offering
price, the Company will be required to issue to the purchasers additional shares
of Common Stock such that the value of their original investment, plus these
newly issued shares, equals 125% of their original investment; provided that the
Company will not be obligated in any event to issue at such time a number of
shares in excess of the number of shares originally issued. The Company has
agreed that the placement agent will serve as its exclusive agent for a period
of up to 120 days and that the Company will not engage in specified activities
pending completion or termination of the Private Offering, subject to certain
specified limitations.

If none of these transactions are consummated by the second week in December,
the Company will likely cease operations or be required to seek relief under the
applicable bankruptcy laws. There can be no assurance that the Company will be
able to consummate any of these transactions including the financing
contemplated in the letter of intent by the second week in December, if at all,
or as to the terms of any such transactions.
 
Except for research and development funding from Searle under Hybridon's
collaborative agreement with Searle (which is subject to early termination in
certain circumstances), Hybridon has no committed external sources of capital,
and, as discussed above, expects no product revenues for several years from
sales of the products that it is developing (as opposed to sales of DNA products
and reagents manufactured on a custom contract basis by the Hybridon Specialty
Products Division).

On April 2, 1997, the Company sold $50.0 million of Notes to certain investors.
The Notes bear interest at a rate of 9% per annum and have a maturity date of
April 1, 2004. Under the Notes, the Company is required to make semi-annual
interest payments on the outstanding principal balance through the maturity date
of April 1, 2004. The Notes are unsecured and subordinate to substantially all
of the Company's existing indebtedness. The Notes are convertible at the option
of the holder into the Company's Common Stock at any time prior to maturity,
unless previously redeemed or repurchased by the Company under certain specified
circumstances, at a conversion price of $7.0125 per share (subject to
adjustment). Upon change of control of the Company (as defined), the Company is
required to offer to repurchase the Notes at 150% of the original issuance
price.

The note payable to Silicon Valley Bank (the "Bank") contains certain financial
covenants that require the Company to maintain minimum tangible net worth (as
defined) and minimum liquidity (as defined) and prohibits the payment of
dividends. The Company has secured the obligations under the note with a lien on
all of its assets. If, at specified times, the Company's minimum liquidity is
less than $15,000,000, $10,000,000, or $5,000,000, the Company is required to
pledge cash collateral to the bank equal to 25%, 50% or 100%, respectively, of
the then outstanding balance under the note, pursuant to a cash pledge
agreement. The notes also contain certain non-financial covenants. As of
September 30, 1997, the Company's minimum liquidity had fallen below $15,000,000
and subsequent to September 30, 1997 Company pledged cash collateral to the bank
of $1,750,000. If the Company does not obtain additional financing by the end of
November, the Company's minimum liquidity as of November 30, 1997 may be less
than $5,000,000 and the balance of the note will need to be pledged by December
31, 1997. The Company has classified the entire balance as a current liability
in the accompanying September 30, 1997 balance sheet as it does not currently
have the financing to remain in compliance with the financial covenants as of
November 19, 1997 (see Note 9(c)) during the fourth quarter of 1997. Failure by
the Company to pledge cash collateral when required would result in a default
under the Company's credit facility with the bank.
   15



                                 HYBRIDON, INC.


                                    PART II

                               OTHER INFORMATION

                                    -------


ITEM 5.  OTHER INFORMATION

         On September 18, 1997, the Company received a notice of delisting from
         The Nasdaq Stock Market, Inc. ("NASDAQ") indicating that because the
         Company was not in compliance with the continued listing requirements
         of the Nasdaq National Market, the Company's Common Stock would be
         delisted from the Nasdaq National Market. The Company appealed the
         decision with NASDAQ and a hearing was held on November 6, 1997. On
         November 17, 1997, NASDAQ informed the Company that the Company's
         Common Stock would not be delisted and would continue to trade on the
         Nasdaq National Market, subject to certain specified conditions,
         including (i) the closing of a minimum $12,000,000 from the Private
         Offering on or before December 1, 1997, (ii) the closing of an
         additional minimum $20,000,000 from the Private Offering on or before
         January 2, 1998, (iii) the closing of certain corporate transactions
         on or before January 2, 1998 and (iv) the filing of a report on or
         before January 2, 1998 evidencing that the Company had a minimum of
         $12,000,000 in net tangible assets as of November 30, 1997, with pro
         forma adjustments for any transactions occurring prior to the filing
         of such report. The Company is seeking clarification with respect to
         certain of these conditions. There can be no assurance that the
         Company will be able to satisfy one or more of these conditions and
         that the Company's Common Stock will continue to be listed on the
         Nasdaq National Market. 
        
ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K


         (a)   Exhibits

               The Exhibits listed in the Exhibit Index immediately preceding
               such Exhibits are filed as part of this Quarterly Report on
               Form 10-Q.

         (b)   Reports on Form 8-K

                    1.   On July 25, 1997, the Company filed a Current Report on
               Form 8-K dated July 25, 1997 reporting, among other things, its
               announcement that (i) it had elected to stop further development
               of its lead compound GEM 91, (ii) it would be focusing its
               resources on its second generation chemistries and (iii) its
               goal for the second half of 1997 was to effect a reduction in its
               expenditure rate on a phased basis over the balance of 1997.  

                    2.   On September 5, 1997, the Company filed a Current
               Report on Form 8-K dated September 3, 1997 reporting its
               announcement of the termination of the Company's research and
               development collaboration with Hoffman-La Roche Ltd.

                    3.   On September 19, 1997, the Company filed a Current
               Report on Form 8-K dated September 19, 1997 reporting its
               announcement of the scheduled delisting of its Common Stock from
               the Nasdaq National Market. 
       
                    4.   On September 24, 1997, the Company filed a Current
               Report on Form 8-K dated September 23, 1997 reporting its
               announcement that the Company was moving forward with the appeal
               process with respect to the scheduled delisting.
   16


                                   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 thereunto duly authorized.


                                HYBRIDON, INC.


November 13, 1997               /s/ E. Andrews Grinstead III
- -----------------               -----------------------------------------------
Date                            E. Andrews Grinstead, III
                                Chairman, President and Chief Executive Officer
                                (Principal Executive Officer)




November 13, 1997               /s/ Lynne J. Rudert
- -----------------               ----------------------------------------------  
Date                            Lynne J. Rudert
                                Director of Finance and Controller
                                (Chief Accounting Officer)
   17


                                 HYBRIDON, INC.

                                 EXHIBIT INDEX


Exhibit No.                       Description
- -----------                       -----------


11            Computation of Net Loss Per Common Share.

27            Financial Data Schedule (EDGAR)

99            Pages 39-48 of the Company's Annual Report on Form 10-K for the
              period ended December 31, 1996 (which is not deemed to be filed
              except to the extent that portions thereof are expressly
              incorporated by reference herein).