SECURITIES AND EXCHANGE COMMISSION
                             Washington. D.C. 20549

                                  SCHEDULE 13D
                                 (Rule l3d-101)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
            TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
                                  RULE 13d-2(a)

                              (Amendment No. 21)(1)

                          Ridgefield Acquisition Corp.
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                                (Name of Issuer)

                     Common Stock, $.001 par value per share
  -----------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   765816 10 3
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                                 (CUSIP Number)

                                Steven N. Bronson
                      225 N.E. Mizner Boulevard, Suite 400
                            Boca Raton, Florida 33432
                                 (561) 362-4199

                                 with a copy to:

                            James A. Prestiano, Esq.
                           631 Commack Road, Suite 2A
                             Commack, New York 11725
                                 (631) 499-6000

                ------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                December 1, 2010
                 ----------------------------------------------
             (Date of Event which Requires Filing of This Statement)

    If the filing person has previously filed a statement on Schedule 13G to
report the acquisition that is the subject of this Schedule 13D, and is filing
this schedule because of Rule l3d-l(e), 13d-1(f) or 13d-1(g), check the
following box [ ]

         Note: Schedules filed in paper format shall include a signed original
     and five copies of the schedule, including all exhibits. See Rule 13d-7(b)
     for other parties to whom copies are to be sent.

         The information required on the remainder of this cover page shall not
     be deemed to be "filed" for the purpose of Section 18 of the Securities
     Exchange Act of 1934 or otherwise subject to the liabilities of that
     section of the Act but shall be subject to all other provisions of the Act
     (however, see the Notes)

                        (Continued on following pages)

- --------
    (1) The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.



CUSIP No.  765816 10 3
- -----------------------------------------------------------------------------
1.       NAME OF REPORTING PERSONS
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

         STEVEN N. BRONSON
- -----------------------------------------------------------------------------
2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP            (a) [ ]
                                                                     (b) [ ]

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3.       SEC USE ONLY


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4.       SOURCE OF FUNDS

         PF
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5.       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
         PURSUANT TO ITEMS 2(d) OR 2(e)                                  [ ]
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6.       CITIZENSHIP OR PLACE OF ORGANIZATION

         USA
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NUMBER OF              7.      SOLE VOTING POWER
SHARES                         1,036,709
BENEFICIALLY            ------------------------------------------------------
OWNED BY               8.      SHARED VOTING POWER
EACH                           0
REPORTING               ------------------------------------------------------
PERSON                 9.      SOLE DISPOSITIVE POWER
WITH                           1,036,709
                        ------------------------------------------------------
                       10.     SHARED DISPOSITIVE POWER
                               0
- -----------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         1,036,709
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12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
         CERTAIN SHARES*                                                 [ ]
- -----------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (1l)

         82%
- -----------------------------------------------------------------------------
14.      TYPE OF REPORTING PERSON

         IN
- -----------------------------------------------------------------------------
                       SEE INSTRUCTIONS BEFORE FILLING OUT




CUSIP No. 765816 10 3                 SCHEDULE 13D

Item 1. Security and Issuer.

     Except as expressly restated and amended below, the Schedule 13D and
amendments thereto, as filed on behalf of Steven N. Bronson with respect to the
shares of common stock $.001 par value per share (the "Common Stock") of
Ridgefield Acquisition Corp., a Nevada corporation, with its principal offices
located at 225 N.E. Mizner Boulevard, Suite 400, Boca Raton, Florida 33432 (the
"Issuer"), remains in full force and effect.


Item 2. Identity and Background.

    (a) This Amendment No. 21 to Schedule 13D is filed on behalf of Steven
N. Bronson.

    (b) Mr. Bronson's business address is 225 N.E. Mizner Boulevard, Suite 400,
Boca Raton, Florida 33432.

    (c) Mr. Bronson is the Chairman and President of the Issuer. Mr.
Bronson is also President of Catalyst Financial LLC ("Catalyst"), a
broker-dealer registered under the Act. Catalyst's offices are located at
225 N.E. Mizner Boulevard, Suite 400, Boca Raton, Florida 33432.  Mr. Bronson
is also the Chairman and President of the Issuer.

    (d) During the last five years Mr. Bronson has not been convicted in a
criminal proceeding (excluding traffic violations or similar misdemeanors).

    (e) Mr. Bronson has not, during the last five years, been a party to a civil
proceeding of a judicial or administrative body of competent jurisdiction and as
a result of such proceeding was or is subject to a judgment, decree or final
order enjoining further violations of, or prohibiting or mandating activities
subject to the federal or state securities laws or finding any violation with
respect to such laws.

    (f) Mr. Bronson is a citizen of the United States of America.


Item 3. Source and Amount of Funds or Other Consideration.

    On December 1, 2010, Mr. Bronson acquired, in an open market transaction,
using his own personal funds, 2,160 shares of Common Stock at a purchase price
of $1.20 per share or $2,592.


Item 4. Purpose of Transaction.

    Mr. Bronson acquired and holds the shares of Common Stock for investment
purposes. Mr. Bronson may: (i) increase or decrease his beneficial ownership of
Common Stock or other securities of the Issuer, (ii) sell all or part of his
shares of Common Stock in open market or privately negotiated sales or
otherwise, or (iii) make further purchases of shares of Common Stock or other
securities of the Issuer through open market or privately negotiated
transactions or otherwise. Mr. Bronson has not reached any decision with respect
to any such possible actions. If Mr. Bronson does reach a decision to undertake
any of the above described possible actions, he will, among other things, timely
file an appropriate amendment to this Schedule 13D.









Item 5. Interest in Securities of the Issuer.

     (a)(b) Mr. Bronson may be deemed to beneficially own an aggregate of
1,036,709 shares of the Issuer's Common Stock, representing approximately 82% of
the total shares of Common Stock deemed outstanding. Mr. Bronson owns, jointly
with his spouse, of record 1,036,709 shares of Common Stock, as to which he
possesses voting and disposition power.

     (c) Not applicable.

     (d) Not applicable.

     (e) Not applicable.


Item 6. Contracts, Arrangements, Understandings or Relationships with Respect
        to Securities of the Issuer.

         None


Item 7. Material to be Filed as Exhibits.

         None

        After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.


Dated:     December 2, 2010



                                                /s/ Steven N. Bronson
                                                --------------------------
                                                (Signature)

                                                Steven N. Bronson
                                                --------------------------
                                                (Name/Title)



Attention: Intentional misstatements or omissions of fact constitute federal
            criminal violations (See 18 U.S.C. Section l001).