SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13D
                                 (Rule 13d-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. 5)(1)




                                 Stamps.com Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

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


                                    852857200
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                    Lloyd I. Miller, III, 4550 Gordon Drive,
                  Naples, Florida, 34102 (Tel.) (239) 262-8577
--------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)

                                 March 13, 2006
                -------------------------------------------------
                  (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 13d-1(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 for other parties
to whom copies are to be sent.

                         (Continued on following pages)

                                Page 1 of 7 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.

     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).





CUSIP NO. 852857200                   13D                            Page 2 of 7




1   NAME OF REPORTING PERSON
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
    Lloyd I. Miller, III                                          279-42-7925


2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (A) [ ]
                                                                       (B) [ ]


3   SEC USE ONLY



4   SOURCE OF FUNDS*
    PF-OO



5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
    ITEMS 2(D) OR  2(E)
                                                                       [ ]


6   CITIZENSHIP OR PLACE OF ORGANIZATION
    United States


     NUMBER OF     7   SOLE VOTING POWER
      SHARES
   BENEFICIALLY        732,030
     OWNED BY
       EACH        8   SHARED VOTING POWER
     REPORTING
      PERSON           856,193
       WITH
                   9   SOLE DISPOSITIVE POWER

                       732,030

                   10  SHARED DISPOSITIVE POWER

                      856,193

11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,588,223

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                            [ ]


13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    6.7%


14  TYPE OF REPORTING PERSON*
    IN-IA-OO

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!




                                                                     Page 3 of 7
INTRODUCTION

     This constitutes Amendment No. 5 to the statement on Schedule 13D, filed on
behalf of Lloyd I. Miller, III ("Mr. Miller"), dated April 30, 2002, as amended
(the "Statement"), relating to the common stock, par value $0.001 per share (the
"Shares") of Stamps.com Inc., a Delaware corporation (the "Company"). Unless
specifically amended or modified hereby, the disclosure set forth in the
Statement shall remain unchanged.

ITEM 3. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATIONS

     Item 3 of the Statement is hereby amended and restated in its entirety as
follows:

     Mr. Miller is the investment advisor to the trustee of Trust A-4 and Trust
C (the "Trusts"). The Trusts were created pursuant to an Amended and Restated
Trust Agreement, dated September 20, 1983 (the "Trust Agreement"). Pursuant to a
Declaratory Judgment, signed by the Honorable Wayne F. Wilke for the Court of
Common Pleas, Probate Division, Hamilton County, Ohio, on October 27, 1992,
Trust A was split into four separate trusts one of which was Trust A-4. All of
the Shares purchased by Trust A-4 were purchased by funds generated and held by
Trust A-4. The aggregate purchase price for the Shares in Trust A-4 was
$2,880,495.18. All of the Shares purchased by Trust C were purchased by funds
generated and held by Trust C. The aggregate purchase price for the Shares in
Trust C was $3,440,100.28.

     Mr. Miller is the manager of Milfam LLC, an Ohio limited liability company
established pursuant to the Operating Agreement of Milfam LLC, dated as of
December 10, 1996. Milfam LLC is the general partner of (i) Milfam I L.P.
("Milfam I"), a Georgia limited partnership established pursuant to the
Partnership Agreement for Milfam I L.P., dated December 11, 1996, and (ii)
Milfam II L.P. ("Milfam II") a Georgia limited partnership established, pursuant
to the Partnership Agreement for Milfam II L.P., dated December 11, 1996.

     Milfam I: All of the Shares Mr. Miller is deemed to beneficially own as the
manager of the general partner of Milfam I were purchased with money contributed
to Milfam I by its partners or money generated and held by Milfam I. The
aggregate purchase price for the Shares in Milfam I was $334,400.00.

     Milfam II: All of the Shares Mr. Miller is deemed to beneficially own as
the manager of the general partner of Milfam II were purchased with money
contributed to Milfam II by its partners or money generated and held by Milfam
II. The aggregate purchase price for the Shares in Milfam II was $2,638,024.06.

     All of the Shares purchased by Mr. Miller on his own behalf, were purchased
with personal funds generated and held by Mr. Miller. The purchase price for the
Shares purchased by Mr. Miller, on his own behalf was $137,000.00.

     Mr. Miller is the custodian to certain accounts created pursuant to the
Florida Uniform Gift to Minors Act ("UGMA"). One such account is for Alexandra
Miller ("Alex UGMA") and another is for Lloyd I. Miller, IV ("Lloyd IV UGMA" and
together with the Alex UGMA, the "Miller UGMAs"). All of the Shares Mr. Miller
is deemed to beneficially own in the Miller UGMAs were purchased with money held
by the Miller UGMAs. The aggregate purchase price for the Shares in the Alex
UGMA was $6,059.98. The aggregate purchase price for the Shares in the Lloyd IV
UGMA was $6,059.98.



                                                                    Page 4 of 7

     Kimberley S. Miller is Mr. Miller's former wife. All of the Shares Mr.
Miller is deemed to beneficially own, as Kimberley S. Miller's former spouse,
were purchased with personal funds held by Kimberley S. Miller. The aggregate
purchase price for the Shares Mr. Miller is deemed to beneficially own as
Kimberley S. Miller's former spouse was $2,942.90.

     Mr. Miller shares investment and dispositive power with his sister Marli
Miller over Shares held by the Marli Miller Custodian Managed Account
established pursuant to a certain PNC Advisors Custody Agreement dated as of
December 9, 2003 ("Marli Managed"). All of the Shares held by Marli Managed were
obtained pursuant to distributions received from a grantor retained annuity
trust.

ITEM 4. PURPOSE OF THE TRANSACTION

     Item 4 of the Statement is hereby amended by adding at the end thereof the
following:

     As of March 16, 2006, Mr. Miller considers his beneficial ownership
reported herein of the 1,588,233 Shares as an investment in the ordinary course
of business. The purpose of this Amendment is to report that since the filing of
Amendment No. 4 to the Statement, dated February 7, 2006 ("Amendment No. 4"), a
material change occurred in the percentage of Shares beneficially owned by Mr.
Miller.

ITEM 5. INTEREST IN SECURITIES OF THE ISSUER

     Item 5 of the Statement is hereby amended and restated in its entirety as
follows:

     (a) Mr. Miller beneficially owns 1,588,223 Shares which is 6.7% of the
23,653,274 outstanding Shares. Pursuant to Rule 13d-3 promulgated under the
Securities Exchange Act of 1934, as amended, the 23,653,274 outstanding Shares
is the sum of the following amounts: (i) 23,643,274 outstanding Shares as of
February 28, 2006 pursuant to the Company's Form 10-K filed on March 14, 2006
and (ii) 10,000 Shares which Mr. Miller may be deemed to beneficially own upon
the exercise of certain immediately exercisable options Mr. Miller beneficially
owns.

     As of the date hereof, 517,794 of such beneficially owned Shares are owned
of record by Trust A-4; 187,266 of such beneficially owned Shares are owned of
record by Trust C; 55,000 of such beneficially owned Shares are owned of record
by Milfam I L.P.; 456,630 of such beneficially owned Shares are owned of record
by Milfam II L.P.; 218,400 of such beneficially owned Shares are owned of record
by Mr. Miller directly (including options to purchase 10,000 Shares); 1,000 of
such beneficially owned Shares are owned of record by Lloyd IV UGMA; 1,000 of
such beneficially owned Shares are owned of record by Alexandra UGMA; 500 of
such beneficially owned Shares are owned of record by Kimberly S. Miller; and
150,633 of such beneficially owned Shares are owned of record by Marli Managed.

     (b) Mr. Miller has or may be deemed to have shared voting and dispositive
power for all such shares held of record by Trust A-4, Trust C, Kimberly S.
Miller and Marli Managed. Mr. Miller has or may be deemed to have sole voting
and dispositive power for all such shares held of record by Milfam I L.P.,
Milfam II L.P., Lloyd IV UGMA, Alexandra UGMA, and Mr. Miller directly.

     (c) The table below details the transactions (all of which were open market
sales) effected since the filing of Amendment No. 4.



                                                                     Page 5 of 7



                                 MILFAM II L.P.


Date of Transaction                        Number of Shares Sold                          Price Per Share
                                                                                    
February 8, 2006                           32,347*                                        $28.897



                                  MARLI MANAGED


Date of Transaction                        Number of Shares Sold                          Price Per Share
                                                                                    
February 16, 2006                          11,949                                         $31.3094

February 22, 2006                          20,479                                         $31.5517

February 23, 2006                          12,500                                         $31.8267

February 27, 2006                          17,955                                         $32.1318



                              LLOYD I. MILLER, III


Date of Transaction                        Number of Shares Sold                          Price Per Share
                                                                                    
February 16, 2006                          11,000                                         $31.3094

February 22, 2006                          20,000                                         $31.5517

February 23, 2006                          13,217                                         $31.8267

February 24, 2006                          400                                            $31.94

February 24, 2006                          17,500                                         $32.1318




                                    TRUST A-4


Date of Transaction                        Number of Shares Sold                          Price Per Share
                                                                                    
March 6, 2006                              200*                                           $33.04

March 13, 2006                             59,800*                                        $33.491505

March 13, 2006                             44,167*                                        $34.339626

March 15, 2006                             15,833*                                        $34.833687

March 15, 2006                             34,785*                                        $35.311268




                                                                     Page 6 of 7

* These transactions were effected pursuant to trading plans compliant with Rule
10b5-1 of the Securities Exchange Act of 1934, as amended.

         (d) Other than Shares held directly by Mr. Miller, persons other than
Mr. Miller have the right to receive and the power to direct the receipt of
dividends from, or the proceeds from, the sale of the reported securities.

         (e)      Not applicable.






                                                                     Page 7 of 7

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:  March 22, 2006

                                                    /s/ Lloyd I. Miller, III
                                                --------------------------------
                                                       Lloyd I. Miller, III