SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G
                                 (Rule 13d-102)

 INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) (c),
             and (d) and AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b)
                               (Amendment No. _)1

                         Regeneration Technologies, Inc.
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                                (Name of Issuer)

                                  Common Stock
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                         (Title of Class of Securities)

                                   75886N 10 0
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                                 (CUSIP Number)

                               June 5, 2003
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             (Date of Event Which Requires Filing of this Statement)


Check appropriate box to designate the rule pursuant to which this Schedule is
filed:

    [   ]  Rule 13d-1(b)

    [ X ]  Rule 13d-1(c)

    [   ]  Rule 13d-1(d)








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     1The 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 the disclosures provided in a prior cover page.

     The  information  required in 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 ("Act") or otherwise  subject to the  liabilities of that section of
the Act but shall to all other provisions of the Act (however, see the Notes).



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CUSIP NO. 75886N 10 0                                    Page  2  of  5  Pages
          -----------                                                --      -
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1                              NAME OF REPORTING PERSON
                               S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                               (ENTITIES ONLY)

                               Neil Gagnon
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2                              CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                            (a) [   ]
                                            (b) [ X ]
- ------------------------------------------------------------------------------
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3                                     SEC USE ONLY

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4                                     CITIZENSHIP OR PLACE OF ORGANIZATION

                                      United States of America
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                        5             SOLE VOTING POWER

                                      443,545

      NUMBER OF         --------------------------------------------------------
       SHARES
    BENEFICIALLY        6             SHARED VOTING POWER
      OWNED BY                        256,370
        EACH
      REPORTING         --------------------------------------------------------
       PERSON
        WITH            7             SOLE DISPOSITIVE POWER

                                      418,695
                        --------------------------------------------------------

                        8             SHARED DISPOSITIVE POWER

                                      919,547
- ------------------------------------------------------------------------------
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9                   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    1,338,242
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10                  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
                    CERTAIN SHARES* [   ]
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11                  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                    5.12%
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12                  TYPE OF REPORTING PERSON*

                    IN
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                      *SEE INSTRUCTION BEFORE FILLING OUT!



Item 1(a)    Name of Issuer:

         Regeneration Technologies, Inc.

Item 1(b)    Address of Issuer's Principal Executive Offices:

         11621 Research Circle
         Alachua, Florida  32615

Item 2(a)   Name of Person Filing:

         Neil Gagnon

Item 2(b)    Address of Principal Business Office or, if none, Residence:

         1370 Avenue of the Americas
         Suite 2002
         New York, NY 10019

Item 2(c)    Citizenship:

         United States of America

Item 2(d)    Title of Class of Securities:

         Common Stock

Item 2(e) CUSIP Number:

         75886N 10 0

Item 3        Type of Reporting Person:

         Not Applicable

Item 4   Ownership.

Item 4(a)    Amount Beneficially Owned:

     As of June 5, 2003,  Neil Gagnon  beneficially  owned  1,338,242  shares of
Common Stock of  Regeneration  Technologies,  Inc.,  which  amount  includes (i)
297,232  shares  beneficially  owned by Mr. Gagnon over which he has sole voting
and dispositive power; (ii) 22,465 shares  beneficially owned by Mr. Gagnon over
which he has sole  voting  power and shared  dispositive  power;  (iii)  144,750
shares  beneficially  owned by Lois Gagnon, Mr. Gagnon's wife, over which he has
shared voting and shared  dispositive power; (iv) 59,085 shares held by the Lois
E. and Neil E. Gagnon  Foundation (the  "Foundation"),  of which Mr. Gagnon is a
trustee and over which he has shared voting and shared



dispositive  power;  (v)  52,535  shares  held  by  the  Gagnon  Family  Limited
Partnership (the  "Partnership") of which Mr. Gagnon is a partner and over which
he has shared voting and shared  dispositive  power;  (vi) 42,125 shares held by
the Gagnon  Grandchildren  Trust (the  "Trust") over which Mr. Gagnon has shared
dispositive  but no voting power;  (vii) 121,463 shares held by a hedge fund (of
which  Mr.  Gagnon  is a  general  partner)  over  which  Mr.  Gagnon  has  sole
dispositive and voting power;  (viii) 2,385 shares held by the Gagnon Securities
LLC P/S Plan (the  "Plan")  (of which Mr.  Gagnon is a  Trustee)  over which Mr.
Gagnon has shared  dispositive  and sole voting power;  and (ix) 596,202  shares
held for certain  customers of Gagnon Securities LLC (of which Mr. Gagnon is the
Managing  Member  and the  principal  owner)  over  which Mr.  Gagnon has shared
dispositive but no voting power.

Item 4(b)    Percent of Class:

     5.12%  beneficially  owned by Mr.  Gagnon.  Calculation  of  percentage  of
beneficial  ownership  is based on  26,125,447  shares of Issuer's  Common Stock
outstanding on May 8, 2003 as reported by the Issuer.

Item 4(c) Number of shares as to which such person has:

         (i) sole power to vote or to direct the vote: 443,545

         (ii) shared power to vote or to direct the vote: 256,370

         (iii) sole power to dispose or to direct the disposition of: 418,695

         (iv) shared power to dispose or to direct the disposition of:  919,547

Items 5-9 Not applicable.

     Filing of this  statement  by the  Reporting  Person shall not be deemed an
admission that he  beneficially  owns the securities  reported herein as held in
customer  accounts  at  Gagnon   Securities  LLC  or  by  the  Foundation,   the
Partnership,  the Trust or the Plan. Mr. Gagnon expressly  disclaims  beneficial
ownership of all securities held in such customer accounts or by the Foundation,
the Partnership,  the Trust or the Plan. No single client's interest as reported
in the customer  accounts at Gagnon Securities LLC exceeds 5% of the outstanding
Common Stock.

Item 10   Certification.

     By signing  below I certify  that,  to the best of my knowledge and belief,
the  securities  referred  to above were not  acquired  and are not held for the
purpose of or with the effect of  changing  or  influencing  the  control of the
issuer of the  securities  and were not acquired and are not held in  connection
with or as a participant in any transaction having that purpose or effect.





                                    SIGNATURE

     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.


                                                      July 3, 2003
                                                      --------------------------
                                                      Date

                                                      /s/ Neil Gagnon
                                                      --------------------------
                                                      Neil Gagnon