SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                   FORM 12b-25

                                                   Commission File Number 1-4676

                           NOTIFICATION OF LATE FILING


(Check  [X] Form 10-K   [ ] Form 11-K   [ ] Form 20-F    [ ] Form 10-Q
One):   [ ] Form N-SAR


For Period Ended:
                 ---------------------------------------------------------------

[   ]  Transition Report on Form 10-K    [   ]  Transition Report on Form 10-Q
[   ]  Transition Report on Form 20-F    [   ]  Transition Report on Form N-SAR
[   ]  Transition Report on Form 11-K

For the Transition Period Ended:
                                ------------------------------------------------

         Read attached  instruction sheet before preparing form. Please print or
type.

         Nothing in this form shall be  construed  to imply that the  Commission
has verified any information contained herein.

         If the  notification  relates to a portion of the filing checked above,
identify the Item(s) to which the notification relates:

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                         Part I. Registrant Information

Full name of registrant             NYFIX, Inc.
                       ---------------------------------------------------------

Former name if applicable Trinitech Systems, Inc.
                                                 -------------------------------

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Address of principal executive office (Street and number)
333 Ludlow Street
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City, State and Zip Code
Stamford, CT 06902

                        Part II. Rule 12b-25 (b) and (c)

         If the subject report could not be filed without unreasonable effort or
expense  and  the  registrant  seeks  relief  pursuant  to Rule  12b-25(b),  the
following should be completed. (Check appropriate box.)

[ ]      (a) The reasons described in reasonable detail in Part III of this form
         could not be eliminated without unreasonable effort or expense;

[X]      (b) The subject annual report, semi-annual report, transition report on
         Form 10-K,  20-F,  11-K or Form N-SAR, or portion thereof will be filed
         on or before the 15th calendar day following the  prescribed  due date;
         or the subject quarterly report or




         transition  report on Form 10-Q, or portion thereof will be filed on or
         before the fifth calendar day following the prescribed due date; and

[ ]      (c) The  accountant's  statement  or  other  exhibit  required  by Rule
         12b-25(c) has been attached if applicable.

                               Part III. Narrative

         State below in reasonable detail the reasons why Form 10-K, 11-K, 20-F,
10-Q,  N-SAR or the transition  report portion thereof could not be filed within
the prescribed time period. (Attach extra sheets if needed.)

         The  Registrant  was unable to file the Form 10-K for the  fiscal  year
ended December 31, 1999 (the "Report")  without  unreasonable  effort or expense
due to the related delays in gathering  information  for inclusion in the Report
associated therewith.

                           Part IV. Other Information

         (1) Name and  telephone  number of person to  contact in regard to this
notification

    Richard Castillo                     (203)                    425-8000
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       (Name)                          (Area Code)          (Telephone number)


         (2) Have all other periodic  reports required under Section 13 or 15(d)
of the Securities  Exchange Act of 1934 or Section 30 of the Investment  Company
Act of 1940 during the  preceding 12 months or for such shorter  period that the
registrant was required to file such report(s) been filed?  If the answer is no,
identify report(s).

                                                                  [X] Yes [ ] No

         (3) Is it  anticipated  that  any  significant  change  in  results  of
operations  from the  corresponding  period  for the last  fiscal  year  will be
reflected by the  earnings  statements  to be included in the subject  report or
portion thereof?


                                                                  [ ] Yes [X] No

         If  so:  attach  an  explanation  of  the  anticipated   change,   both
narratively and  quantitatively,  and, if  appropriate,  state the reasons why a
reasonable estimate of the results cannot be made. See attachment.

                                   NYFIX, Inc.
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                  (Name of registrant as specified in charter)

Has  caused  this  notification  to be signed on its  behalf by the  undersigned
thereunto duly authorized.

Date     March 30, 2000                 By   /s/ Peter Kilbinger Hansen
    ----------------------------          --------------------------------------
                                              Name: Peter Kilbinger Hansen
                                              Title: Chairman & President

                  Instruction. The form may be signed by an executive officer of
         the registrant or by any other duly authorized representative. The name
         and title of the  person  signing  the form  shall be typed or  printed
         beneath  the  signature.  If the  statement  is signed on behalf of the
         registrant  by an  authorized  representative  (other than an executive
         officer),  evidence of the representative's authority to sign on behalf
         of the registrant shall be filed with the form.


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