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 quarter ended March 31, 1999

                         Commission file number: 0-23047


                           SIGA PHARMACEUTICALS, INC.
             (Exact name of registrant as specified in its charter)


            DELAWARE                                         13-3864870
(State or other jurisdiction of                         (IRS Employer Id. No.)
incorporation or organization)

                              420 Lexington Avenue
                               New York, NY 10170
                    (Address of principal executive offices)

       Registrant's telephone number, including area code: (212) 672-9100


Indicate by check mark whether the registrant (1) has filed all reports required
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[_]


As of May 7, 1999, the Registrant had outstanding 6,557,712 shares of its $.0001
par value Common Stock.




                           SIGA PHARMACEUTICALS, INC.
                          (A development stage company)

                          Part I. Financial Information

     Item 1. Financial Statements

                                  BALANCE SHEET



                                                                                      March 31,           December 31,
                                                                                        1999                  1998
                                                                                    ------------          ------------
                                      ASSETS
                                                                                                    
 Current Assets
   Cash and cash equivalents ...................................................    $  4,014,809          $  4,966,873
   Accounts receivable .........................................................              --                    --
   Prepaid sponsored research ..................................................              --                    --
   Prepaid expenses ............................................................         113,026               134,969
                                                                                    ------------          ------------
     Total current assets ......................................................       4,127,835             5,101,842
                                                                                    
   Equipment, net ..............................................................       1,658,529             1,696,404
   Investments .................................................................          91,199               132,220
   Other assets ................................................................         147,002               147,002
                                                                                    ------------          ------------
     Total assets ..............................................................       6,024,565             7,077,468
                                                                                    ============          ============
                                                                                    
                        LIABILITIES AND STOCKHOLDERS' EQUITY                        
Current liabilities                                                                 
   Accounts payable ............................................................         286,087               266,371
   Accrued expenses ............................................................          58,771               143,364
   Capital lease obligations ...................................................         312,477               369,288
                                                                                    ------------          ------------
     Total liabilities .........................................................         657,335               779,023
                                                                                    
   Non current capital lease obligations .......................................         632,478               650,659
Commitments and contingencies ..................................................              --                    --
                                                                                    
Stockholders' equity                                                                
   Preferred stock ($.0001 par value, 10,000,000 shares authorized,                 
     none issued and outstanding) ..............................................              --                    --
   Common stock ($.0001 par value, 25,000,000 shares authorized,                    
     6,577,712 and 6,577,712 issued and outstanding at March 31, 1999               
     and December 31, 1998, respectively) ......................................             658                   658
   Additional paid-in capital ..................................................      16,712,044            16,697,424
   Unrealized losses on available for sale securities ..........................         (15,180)              (34,816)
   Deficit accumulated during the development stage ............................     (11,962,770)          (11,015,480)
                                                                                    ------------          ------------
     Total stockholders' equity ................................................       4,734,752             5,647,786
                                                                                    ------------          ------------
     Total liabilities and stockholders' equity ................................       6,024,565             7,077,468
                                                                                    ============          ============
                                                                        

    The accompanying notes are an integral part of these financial statements




                           SIGA PHARMACEUTICALS, INC.
                          (A development stage company)

                             STATEMENT OF OPERATIONS



                                                                                                                      For The Period
                                                                                                                       December 28,
                                                                                                                       1995 (Date of
                                                                                        Three Months Ended             Inception) to
                                                                                             March 31,                   March 31,
                                                                                         1999             1998             1999
                                                                                     ------------     ------------    --------------
                                                                                      (Unaudited)      (Unaudited)      (Unaudited)
                                                                                                              
 Revenues - Research and development
     contracts                                                                            112,500     $    112,500     $  1,237,500
                                                                                     ------------     ------------     ------------


Operating expenses

     General and administrative (including amounts to
       related parties of $126,356 and $117,120 for the
       three months ended March 31, 1999 and 1998,
       respectively                                                                  $    525,085          540,818        5,653,351

     Research and development (including amounts
       to related parties of $18,750 for each of the
       three months ended March 31, 1999 and 1998                                         553,704          512,217        5,090,449

     Write-off of in-process research and development                                          --        1,457,458        1,457,458
     Patent preparation fees                                                               61,939           40,278          999,216
     Stock option and warrant compensation                                                     --           14,407          450,450
                                                                                     ------------     ------------     ------------

Total operating expenses                                                                1,140,728        2,565,178       13,650,924
                                                                                     ------------     ------------     ------------

Operating loss                                                                         (1,028,228)      (2,452,678)     (12,413,424)
                                                                                     ------------     ------------     ------------

Interest income/(expense)                                                                  56,848           81,932          426,564
Net gain on sale of securities                                                             24,090               --           24,090
                                                                                     ------------     ------------     ------------

Net loss                                                                             $   (947,290)    $ (2,370,746)    $(11,962,770)
                                                                                     ------------     ------------     ------------

Other comprehensive income
     Unrealized gain/(loss) on available for sale securities                               19,636               --          (15,180)
                                                                                     ------------     ------------     ------------

Comprehensive income/(loss)                                                          $   (927,654)    $ (2,370,746)    $(11,977,950)

Basic and diluted loss per share                                                     $      (0.14)    $      (0.37)
                                                                                     ------------     ------------

Weighted average common shares outstanding used
  for basic and diluted loss per share                                                  6,577,712        6,424,859
                                                                                     ------------     ------------


    The accompanying notes are an integral part of these financial statements





                           SIGA PHARMACEUTICALS, INC.
                          (A development stage company)

                             STATEMENT OF CASH FLOWS



                                                                                                                      For The Period
                                                                                                                       December 28,
                                                                                                                       1995 (Date of
                                                                                  Three Months Ended                   Inception) to
                                                                             March 31,             March 31,             March 31,
                                                                               1999                  1998                  1999
                                                                           ---------------------------------------------------------
                                                                            (Unaudited)           (Unaudited)           (Unaudited)
                                                                                                              
Cash flows from operating activities:
  Net loss                                                                 $   (947,290)         $ (2,370,746)         $(11,962,770)
  Adjustments to reconcile net loss to net
    cash used in operating activities:
    Depreciation                                                                 92,459                10,656               320,440
    Stock, options & warrant compensation                                        14,620                14,407               640,940
    Amortization of debt discount                                                    --                    --               133,000
    Write-off of in-process research and development                                 --             1,457,458             1,457,458
    Realized gain on sale of marketable securities                              (24,090)                                    (24,090)
    Changes in assets and liabilities:
      Accounts receivable                                                            --               150,000                    --
      Prepaid sponsored research                                                                       11,684                    --
      Prepaid expenses and ither current assets                                  21,943                41,615              (113,026)
      Other assets                                                                   --              (112,618)             (147,002)
      Accounts payable and accrued expenses                                     (64,877)             (186,671)              344,858
                                                                           ------------          ------------          ------------

      Net cash used in operating activities                                    (907,235)             (984,215)           (9,350,192)
                                                                           ------------          ------------          ------------

Cash flows from investing activities:
  Capital expenditures                                                          (54,584)              (81,587)           (1,978,969)
  Purchase of minority interest                                                                                            (167,036)
  Proceeds from sale of securities                                               84,747                    --                84,747
                                                                           ------------          ------------          ------------

      Net cash flow used in investing activities                                 30,163               (81,587)           (2,061,258)
                                                                           ------------          ------------          ------------


Cash flows from financing activities:
  Net proceeds from issuance of common stock                                         --                                  14,480,056
  Receipts of stock subscriptions outstanding                                        --                                       1,248
  Proceeds from bridge notes                                                         --                                   1,000,000
  Repayment of bridge notes                                                                                              (1,000,000)
  Proceeds from sale and leaseback of equipment                                                                           1,139,085
  Principal payments on capital lease obligations                               (74,992)                   --              (194,130)
                                                                           ------------          ------------          ------------

      Net cash provided from financing activities                               (74,992)                   --            15,426,259
                                                                           ------------          ------------          ------------


Net increase in cash and cash equivalents                                      (952,064)           (1,065,802)            4,014,809
Cash and cash equivalents at beginning of period                              4,966,873            10,674,104                    --
                                                                           ------------          ------------          ------------
Cash and cash equivalents at end of period                                 $  4,014,809          $  9,608,302          $  4,014,809
                                                                           ------------          ------------          ------------



    The accompanying notes are an integral part of these financial statements





                           SIGA Pharmaceuticals, Inc.
                          (A development stage company)


1.   Basis of Presentation

     The financial statements of SIGA Pharmaceuticals, Inc. have been prepared
in accordance with generally accepted accounting principles for interim
financial information and the rules of the Securities and Exchange Commission
(the "SEC") for quarterly reports on forms 10-QSB and do not include all of the
information and footnote disclosures required by generally accepted accounting
principles for complete financial statements. These statements should be read in
conjunction with the Company's audited financial statements and notes thereto
for the year ended December 31, 1998, included in the 1998 Form 10-KSB.

     In the opinion of management, the accompanying unaudited financial
statements include all adjustments, consisting of normal adjustments, necessary
for a fair presentation of results of operations for the interim periods. The
results of operations for the three ended March 31, 1999 are not necessarily
indicative of the results of operations to be expected for the full year ending
December 31, 1999.

2.   License and Research Support Agreements

     In January 1996, the Company entered into a research agreement with a third
party. Under the terms of the agreements, the Company had agreed to fund further
research by the third parties in the annual amount of approximately $360,000.
The agreement expired in January 1998; however, the Company has continued its
relationship with the third party under similar terms for the period ended
January 1999 and intends to continue its relationship with the third party on an
informal basis.

     In February 1998, the Company entered into a research collaboration and
license agreement with a third party. Under the terms of the agreement, the
Company has been granted an exclusive world-wide license to make, use and sell
products derived from the licensed technology, in exchange for royalty payments
equal to a certain percentage of net sales of products incorporating the
licensed technology, and certain milestone payments. In addition, the Company
agreed to sponsor further research by the third party for the development of the
licensed technologies in the amounts of approximately $187,000, $387,000 and
$403,000, for the years ending December 31, 1998, 1999 and 2000. During the
three months ended March 31, 1999 and 1998 the company incurred sponsored
research expense in the amount of $44,808 and $0 under this agreement.





Item 2.   MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
          RESULTS OF OPERATIONS

Overview

The Company is a development stage, biopharmaceutical company. Since its
inception in December 1995, the Company's efforts have been principally devoted
to research and development, securing patent protection, obtaining corporate
relationships and raising capital. Since its inception through March 31, 1999,
the Company has sustained cumulative net losses of $11,962,770, including
non-cash charges in the amount of $1,457,458 for the write-off of research and
development expenses associated with the acquisition of certain technology
rights acquired from a third party in exchange for the Company's common stock.
In addition, a non-cash charge of $450,450 was incurred for stock option and
warrant compensation expense. The Company's losses have resulted primarily from
expenditures incurred in connection with research and development, patent
preparation and prosecution and general and administrative expenses. From
inception through March 31, 1999, research and development expenses amounted to
$5,090,449, patent preparation and prosecution expenses totaled $999,216, and
general and administration expenses amounted to $5,653,351. From inception
through March 31, 1999 revenues from research and development agreements totaled
$1,237,500.

The Company expects to continue to incur substantial research and development
costs in the future resulting from ongoing research and development programs,
manufacturing of products for use in clinical trials and pre-clinical testing of
the Company's products. The Company also expects that general and administrative
costs, including patent and regulatory costs, necessary to support clinical
trials, research and development, will continue to be substantial in the future.
Accordingly, the Company expects to incur operating losses for the foreseeable
future. There can be no assurance that the Company will ever achieve profitable
operations.

To date, the Company has not marketed, or generated revenues from the commercial
sale of any products. The Company's current product candidates are not expected
to be commercially available for several years.

Results of Operations

Three months ended March 31, 1999 to the three months ended March 31, 1998

Revenues from research and development contracts were $112,500 for the three
months ended March 31, 1999, the same amount as received for the same period of
1998. The revenue was the result of payments made to the Company under an
agreement entered into in July of 1997 with Wyeth-Ayerst, under which the
Company receives certain payments for research and development activities
sponsored by Wyeth-Ayerst.





Research and development expenses increased to $553,704 for the three months
ended March 31, 1999, an 8.1% increase from the $512,217 of expenses incurred
for the same period in 1998. The modest increase reflects the Company's
concentration on its core development programs at a level that is consistent
with its financial resources. Further, in the 1999 quarter, the Company's
research and development activities were largely carried out at its Corvallis,
Oregon research facility, greatly reducing the amount spent on third party
research agreements as compared to the three months ended March 31, 1998.

The Company incurred a non-cash charge for the three months ended March 31, 1998
totaling $1,457,458 for the write-off of in-process research and development
associated with the acquisition of certain technology from MedImmune, Inc. in
exchange for 335,530 shares of the Company's common stock. No similar charges
were incurred in the three month period ended March 31, 1999.

General and administrative expenses declined approximately 3% in the three
months ended March 31, 1999 to $525,085 from $540,818 for the three months ended
March 31, 1998. The decrease reflects the Company's ongoing effort to preserve
its cash resources. Beginning in the quarter ended December 31, 1998 and
carrying forward through the three month period ended March 31, 1999, the
Company has materially reduced its level of general and administrative spending
compared to the second and third quarters of the year ended December 31, 1998.
The reduced level of general and administrative spending was largely attained
through the restructuring of the Company's executive management and careful
monitoring of expenses.

Patent expense of $61,939 for the three months ended March 31, 1999 represents
an increase of 53.8% from the $40,278 level of the prior year. The increase in
spending is due to the Company's commitment to maintain and expand patent
protection for the technology developed by the Company and under third party
agreements.

Total operating loss declined by $1,424,450 to $1,028,228 for the three months
ended March 31, 1999 from $2,452,678 for the same period of 1998. Excluding the
one time non-cash expense of $1,457,458 for the write-off of in-process research
and development incurred for the three months ended March 31, 1998, the
operating loss was essentially equal for the two periods.

Interest income for the three months ended March 31, 1999 was $56,848 compared
to $81,932 for the prior year period. The decline is the result of lower cash
balances in the three month period of 1999 compared to the three months ended
March 31, 1998.

Net loss per common share of $0.14 for the three months ended March 31, 1999
represents a decrease in loss per share of $0.23 from the $0.37 loss incurred
for the three months ended March 31, 1998. The decline in the loss per share is
the result of the one-time non-cash charge for the write-off of in-process
research and development incurred in the prior year period. Excluding this
one-time charge, net loss per share for the three





months ended March 31, 1998 was $0.14, the same as the net loss per share for
the 1999 period.

Liquidity and Capital Resources

As of March 31, 1999 the Company had $4,014,809 in cash and cash equivalents and
$3,470,500 of net working capital. In July, August and September of 1998 the
Company sold certain laboratory equipment, computer equipment and furniture to a
third party, for $493,329, $385,423 and $260,333, respectively, under
sale/leaseback arrangements. The leases have a term of 42 months and require
minimum monthly payments of $13,171, $10,290 and $6,950, respectively. The
Company has an option to purchase the equipment for Fair Market Value (defined
in the agreement as 15% of original cost) at the end of the lease. In July of
1997 the Company entered into a collaborative research and license agreement
with Wyeth-Ayerst. Under the terms of the agreement, the Company has granted
Wyeth-Ayerst an exclusive worldwide license to develop, make, use and sell
products derived from specified technologies. If certain milestones are met, the
agreement requires Wyeth-Ayerst to sponsor further research by the Company for
the development of the licensed technologies for a period of two years from the
effective date of the agreement, in return for minimum payments to the Company
totaling $1,200,000. Through March 31, 1999 the Company has received a total of
$1,237,500 from Wyeth-Ayerst.

The Company anticipates that its current resources will be sufficient to finance
the Company's currently anticipated needs for operating and capital expenditures
through at least the first quarter of 2000. The Company will continue to
carefully monitor its general and administrative expenses and the progress of
its research programs in an effort to reduce expenditures where appropriate. In
addition, the Company will attempt to generate additional working capital
through a combination of collaborative agreements, strategic alliances and
equity financings. However, no assurance can be provided that additional capital
will be obtained through these sources.

The Company's working capital and capital requirements will depend upon numerous
factors, including progress of the Company's research and development programs;
pre-clinical and clinical testing; timing and cost of obtaining regulatory
approvals; levels of resources that the Company devotes to the development of
manufacturing and marketing capabilities; technological advances; status of
competitors; and the ability of the Company to establish collaborative
arrangements with other organizations.





                                     Part II

                                Other Information

Item 1        Legal Proceedings                                             NONE

Item 2        Changes in Securities                                         NONE

Item 3        Defaults upon Senior Securities                               NONE

Item 4        Submission of Matters to Vote of Security Holders             NONE

Item 5        Other Information                                             NONE

Item 6        Exhibits and Reports on Form 8-K                              NONE





                                 SIGNATURE PAGE


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.


                                 SIGA PHARMACEUTICALS, INC.


Dated: May 14, 1999

                                by:  /s/ Thomas N. Konatich
                                     -------------------------------------------

                                     Thomas N. Konatich
                                     Chief Financial Officer
                                     (Principal Accounting and Financial Officer
                                     and Vice President, Finance)