Document:

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                                                                   EXHIBIT 10.14

                            ALIGN TECHNOLOGY, INC.

                         EMPLOYEE STOCK PURCHASE PLAN
                         ----------------------------

     I.   PURPOSE OF THE PLAN

          This Employee Stock Purchase Plan is intended to promote the interests
of Align Technology, Inc., a Delaware corporation, by providing eligible
employees with the opportunity to acquire a proprietary interest in the
Corporation through participation in a payroll deduction-based employee stock
purchase plan designed to qualify under Section 423 of the Code.

          Capitalized terms herein shall have the meanings assigned to such
terms in the attached Appendix.

     II.  ADMINISTRATION OF THE PLAN

          The Plan Administrator shall have full authority to interpret and
construe any provision of the Plan and to adopt such rules and regulations for
administering the Plan as it may deem necessary in order to comply with the
requirements of Code Section 423.  Decisions of the Plan Administrator shall be
final and binding on all parties having an interest in the Plan.

     III. STOCK SUBJECT TO PLAN

          A.   The stock purchasable under the Plan shall be shares of
authorized but unissued or reacquired Common Stock, including shares of Common
Stock purchased on the open market. The number of shares of Common Stock
initially reserved for issuance over the term of the Plan shall be limited to
one million five hundred thousand (1,500,000) shares.

          B.   The number of shares of Common Stock available for issuance under
the Plan shall automatically increase on the first trading day of January each
calendar year during the term of the Plan, beginning with calendar year 2001, by
an amount equal to three percent (3%) of the total number of shares of Common
Stock outstanding on the last trading day in December of the immediately
preceding calendar year, but in no event shall any such annual increase exceed
1,000,000 shares.

          C.   Should any change be made to the Common Stock by reason of any
stock split, stock dividend, recapitalization, combination of shares, exchange
of shares or other change affecting the outstanding Common Stock as a class
without the Corporation's receipt of consideration, appropriate adjustments
shall be made to (i) the maximum number and class of securities issuable under
the Plan, (ii) the maximum number and class of securities purchasable per
Participant on any one Purchase Date, (iii) the maximum number and class of
securities purchasable in total by all Participants on any one Purchase Date,
(iv) the maximum number
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and/or class of securities by which the share reserve is to increase
automatically each calendar year pursuant to the provisions of Section III.B of
this Article One and (v) the number and class of securities and the price per
share in effect under each outstanding purchase right in order to prevent the
dilution or enlargement of benefits thereunder.

     IV.  OFFERING PERIODS

          A.   Shares of Common Stock shall be offered for purchase under the
Plan through a series of overlapping offering periods until such time as (i) the
maximum number of shares of Common Stock available for issuance under the Plan
shall have been purchased or (ii) the Plan shall have been sooner terminated.

          B.   Each offering period shall be of such duration (not to exceed
twenty-four (24) months) as determined by the Plan Administrator prior to the
start date of such offering period. Offering periods shall commence at semi-
annual intervals on the first business day of February and August each year over
the term of the Plan. Accordingly, two (2) separate offering periods shall
commence in each calendar year the Plan remains in existence. However, the
initial offering period shall commence at the Effective Time and terminate on
the last business day in January 2003.

          C.   Each offering period shall consist of a series of one or more
successive Purchase Intervals. Purchase Intervals shall run from the first
business day in February to the last business day in July each year and from the
first business day in August each year to the last business day in January in
the following year. However, the first Purchase Interval in effect under the
initial offering period shall commence at the Effective Time and terminate on
the last business day in July 2001.

          D.   Should the Fair Market Value per share of Common Stock on any
Purchase Date within a particular offering period be less than the Fair Market
Value per share of Common Stock on the start date of that offering period, then
the individuals participating in such offering period shall, immediately after
the purchase of shares of Common Stock on their behalf on such Purchase Date, be
transferred from that offering period and automatically enrolled in the next
offering period commencing after such Purchase Date.

     V.   ELIGIBILITY

          A.   Each individual who is an Eligible Employee on the start date of
any offering period under the Plan may enter that offering period on such start
date. However, an Eligible Employees may participate in only one offering period
at a time. For the initial offering period commencing at the Effective Time,
each individual who is an Eligible Employee at that time shall automatically be
enrolled as a Participant with a contribution rate equal to fifteen percent
(15%) of his or her Cash Earnings.

                                       2.
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          B.   Except as otherwise provided in Sections IV.D and V.A above, an
Eligible Employee must, in order to participate in the Plan for a particular
offering period, complete the enrollment forms prescribed by the Plan
Administrator (including a stock purchase agreement and a payroll deduction
authorization) and file such forms with the Plan Administrator (or its
designate) on or before the start date of that offering period.

     VI.  PAYROLL DEDUCTIONS

          A.  The payroll deduction authorized by the Participant for purposes
of acquiring shares of Common Stock during an offering period may be any
multiple of one percent (1%) of the Cash Earnings paid to the Participant during
each Purchase Interval within that offering period, up to a maximum of fifteen
percent (15%). The deduction rate so authorized shall continue in effect
throughout the offering period, except to the extent such rate is changed in
accordance with the following guidelines:

               (i)   The Participant may, at any time during the offering
     period, reduce his or her rate of payroll deduction (or to the extent
     applicable, the percentage of Cash Earnings to serve as his or her lump sum
     contribution for the initial Purchase Interval of the first offering
     period) to become effective as soon as possible after filing the
     appropriate form with the Plan Administrator. The Participant may not,
     however, effect more than one (1) such reduction per Purchase Interval.

               (ii)  The Participant may, prior to the commencement of any new
     Purchase Interval within the offering period, increase the rate of his or
     her payroll deduction by filing the appropriate form with the Plan
     Administrator. The new rate (which may not exceed the fifteen percent (15%)
     maximum) shall become effective on the start date of the first Purchase
     Interval following the filing of such form.

          B.   Payroll deductions shall begin on the first pay day
administratively feasible following the start date of the offering period and
shall (unless sooner terminated by the Participant) continue through the pay day
ending with or immediately prior to the last day of that offering period. The
amounts so collected shall be credited to the Participant's book account under
the Plan, but no interest shall be paid on the balance from time to time
outstanding in such account. The amounts collected from the Participant shall
not be required to be held in any segregated account or trust fund and may be
commingled with the general assets of the Corporation and used for general
corporate purposes.

          C.   For the initial Purchase Interval of the first offering period
under the Plan, no payroll deductions shall be required of the Participant until
such time as the Participant affirmatively elects to commence such payroll
deductions following his or her receipt of the 1993 Act prospectus for the Plan.
In the absence of such payroll deductions, the Participant will

                                       3.
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be required to contribute the applicable percentage of his or her Cash Earnings
to the Plan in a lump sum payment immediately prior to the close of that
Purchase Interval should the Participant elect to have shares of Common Stock
purchased on his or her behalf on the Purchase Date for that initial Purchase
Interval.

          D.   Payroll deductions shall automatically cease upon the termination
of the Participant's purchase right in accordance with the provisions of the
Plan.

          E.   The Participant's acquisition of Common Stock under the Plan on
any Purchase Date shall neither limit nor require the Participant's acquisition
of Common Stock on any subsequent Purchase Date, whether within the same or a
different offering period.

     VII. PURCHASE RIGHTS

          A.   Grant of Purchase Rights.  A Participant shall be granted a
               ------------------------
separate purchase right for each offering period in which he or she is enrolled.
The purchase right shall be granted on the start date of the offering period and
shall provide the Participant with the right to purchase shares of Common Stock,
in a series of successive installments during that offering period, upon the
terms set forth below. The Participant shall execute a stock purchase agreement
embodying such terms and such other provisions (not inconsistent with the Plan)
as the Plan Administrator may deem advisable.

          Under no circumstances shall purchase rights be granted under the Plan
to any Eligible Employee if such individual would, immediately after the grant,
own (within the meaning of Code Section 424(d)) or hold outstanding options or
other rights to purchase, stock possessing five percent (5%) or more of the
total combined voting power or value of all classes of stock of the Corporation
or any Corporate Affiliate.

          B.   Exercise of the Purchase Right. Each purchase right shall be
               ------------------------------
automatically exercised in installments on each successive Purchase Date within
the offering period, and shares of Common Stock shall accordingly be purchased
on behalf of each Participant on each such Purchase Date. The purchase shall be
effected by applying the Participant's payroll deductions (or, to the extent
applicable, his or her lump sum contribution) for the Purchase Interval ending
on such Purchase Date to the purchase of whole shares of Common Stock at the
purchase price in effect for the Participant for that Purchase Date.

          C.   Purchase Price.  The purchase price per share at which Common
               --------------
Stock will be purchased on the Participant's behalf on each Purchase Date within
the particular offering period in which he or she is enrolled shall be equal to
eighty-five percent (85%) of the lower of (i) the Fair Market Value per share of
Common Stock on the start date of that offering period or (ii) the Fair Market
Value per share of Common Stock on that Purchase Date.

                                       4.
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          D.   Number of Purchasable Shares. The number of shares of Common
               ----------------------------
Stock purchasable by a Participant on each Purchase Date during the particular
offering period in which he or she is enrolled shall be the number of whole
shares obtained by dividing the amount collected from the Participant through
payroll deductions during the Purchase Interval ending with that Purchase Date
(or, to the extent applicable, his or her lump sum contribution for that
Purchase Interval) by the purchase price in effect for the Participant for that
Purchase Date. However, the maximum number of shares of Common Stock purchasable
per Participant on any one Purchase Date shall not exceed 2,500 shares, subject
to periodic adjustments in the event of certain changes in the Corporation's
capitalization. In addition, the maximum number of shares of Common Stock
purchasable in total by all Participants in the Plan on any one Purchase Date
shall not exceed 125,000 shares, subject to periodic adjustments in the event of
certain changes in the Corporation's capitalization. However, the Plan
Administrator shall have the discretionary authority, exercisable prior to the
start of any offering period under the Plan, to increase or decrease the
limitations to be in effect for the number of shares purchasable per Participant
and in total by all Participants enrolled in that particular offering period on
each Purchase Date which occurs during that offering period.

          E.   Excess Payroll Deductions.  Any payroll deductions not applied to
               -------------------------
the purchase of shares of Common Stock on any Purchase Date because they are not
sufficient to purchase a whole share of Common Stock shall be held for the
purchase of Common Stock on the next Purchase Date. However, any payroll
deductions not applied to the purchase of Common Stock by reason of the
limitation on the maximum number of shares purchasable per Participant or in
total by all Participants on the Purchase Date shall be promptly refunded.

          F.   Termination of Purchase Right.  The following provisions shall
               -----------------------------
govern the termination of outstanding purchase rights:

               (i)   A Participant may, at any time prior to the next scheduled
     Purchase Date in the offering period in which he or she is enrolled,
     terminate his or her outstanding purchase right by filing the appropriate
     form with the Plan Administrator (or its designate), and no further payroll
     deductions shall be collected from the Participant with respect to the
     terminated purchase right. Any payroll deductions collected during the
     Purchase Interval in which such termination occurs shall, at the
     Participant's election, be immediately refunded or held for the purchase of
     shares on the next Purchase Date. If no such election is made at the time
     such purchase right is terminated, then the payroll deductions collected
     with respect to the terminated right shall be refunded as soon as possible.

               (ii)  The termination of such purchase right shall be
     irrevocable, and the Participant may not subsequently rejoin the offering
     period for which the terminated purchase right was granted. In order to
     resume participation in any subsequent offering period, such individual
     must re-enroll in the Plan (by making a timely filing of the prescribed
     enrollment forms) on or before the start date of that offering period.

                                       5.
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               (iii) Should the Participant cease to remain an Eligible Employee
     for any reason (including death, disability or change in status) while his
     or her purchase right remains outstanding, then that purchase right shall
     immediately terminate, and all of the Participant's payroll deductions for
     the Purchase Interval in which the purchase right so terminates shall be
     immediately refunded. However, should the Participant cease to remain in
     active service by reason of an approved unpaid leave of absence, then the
     Participant shall have the right, exercisable up until the last business
     day of the Purchase Interval in which such leave commences, to (a) withdraw
     all the payroll deductions collected to date on his or her behalf for that
     Purchase Interval or (b) have such funds held for the purchase of shares on
     his or her behalf on the next scheduled Purchase Date. In no event,
     however, shall any further payroll deductions be collected on the
     Participant's behalf during such leave. Upon the Participant's return to
     active service (x) within ninety (90) days following the commencement of
     such leave or (y) prior to the expiration of any longer period for which
     such Participant's right to reemployment with the Corporation is guaranteed
     by statute or contract, his or her payroll deductions under the Plan shall
     automatically resume at the rate in effect at the time the leave began,
     unless the Participant withdraws from the Plan prior to his or her return.
     An individual who returns to active employment following a leave of absence
     that exceeds in duration the applicable (x) or (y) time period will be
     treated as a new Employee for purposes of subsequent participation in the
     Plan and must accordingly re-enroll in the Plan (by making a timely filing
     of the prescribed enrollment forms) on or before the start date of any
     subsequent offering period in which he or she wishes to participate.

          G.   Change in Control.  Each outstanding purchase right shall
               -----------------
automatically be exercised, immediately prior to the effective date of any
Change in Control, by applying the payroll deductions of each Participant for
the Purchase Interval in which such Change in Control occurs to the purchase of
whole shares of Common Stock at a purchase price per share equal to eighty-five
percent (85%) of the lower of (i) the Fair Market Value per share of Common
Stock on the start date of the offering period in which such individual is
enrolled at the time of such Change in Control or (ii) the Fair Market Value per
share of Common Stock immediately prior to the effective date of such Change in
Control. However, the applicable limitation on the number of shares of Common
Stock purchasable per Participant shall continue to apply to any such purchase,
but not the limitation applicable to the maximum number of shares of Common
Stock purchasable in total by all Participants on any one Purchase Date.

          The Corporation shall use its best efforts to provide at least ten
(10) days' prior written notice of the occurrence of any Change in Control, and
Participants shall, following the receipt of such notice, have the right to
terminate their outstanding purchase rights prior to the effective date of the
Change in Control.

                                       6.
<PAGE>

          H.   Proration of Purchase Rights.  Should the total number of shares
               ----------------------------
of Common Stock to be purchased pursuant to outstanding purchase rights on any
particular date exceed the number of shares then available for issuance under
the Plan, the Plan Administrator shall make a pro-rata allocation of the
available shares on a uniform and nondiscriminatory basis, and the payroll
deductions of each Participant, to the extent in excess of the aggregate
purchase price payable for the Common Stock pro-rated to such individual, shall
be refunded.

            I.   Assignability.  The purchase right shall be exercisable only by
                 -------------
the Participant and shall not be assignable or transferable by the Participant.

            J.   Stockholder Rights.  A Participant shall have no stockholder
                 ------------------
rights with respect to the shares subject to his or her outstanding purchase
right until the shares are purchased on the Participant's behalf in accordance
with the provisions of the Plan and the Participant has become a holder of
record of the purchased shares.

     VIII.  ACCRUAL LIMITATIONS

            A.   No Participant shall be entitled to accrue rights to acquire
Common Stock pursuant to any purchase right outstanding under this Plan if and
to the extent such accrual, when aggregated with (i) rights to purchase Common
Stock accrued under any other purchase right granted under this Plan and (ii)
similar rights accrued under other employee stock purchase plans (within the
meaning of Code Section 423)) of the Corporation or any Corporate Affiliate,
would otherwise permit such Participant to purchase more than Twenty-Five
Thousand Dollars ($25,000.00) worth of stock of the Corporation or any Corporate
Affiliate (determined on the basis of the Fair Market Value per share on the
date or dates such rights are granted) for each calendar year such rights are at
any time outstanding.

            B.   For purposes of applying such accrual limitations to the
purchase rights granted under the Plan, the following provisions shall be in
effect:

                 (i)    The right to acquire Common Stock under each outstanding
     purchase right shall accrue in a series of installments on each successive
     Purchase Date during the offering period in which such right remains
     outstanding.

                 (ii)   No right to acquire Common Stock under any outstanding
     purchase right shall accrue to the extent the Participant has already
     accrued in the same calendar year the right to acquire Common Stock under
     one or more other purchase rights at a rate equal to Twenty-Five Thousand
     Dollars ($25,000.00) worth of Common Stock (determined on the basis of the
     Fair Market Value per share on the date or dates of grant) for each
     calendar year such rights were at any time outstanding.

            C.   If by reason of such accrual limitations, any purchase right of
a Participant does not accrue for a particular Purchase Interval, then the
payroll deductions that the Participant made during that Purchase Interval with
respect to such purchase right shall be promptly refunded.

                                       7.
<PAGE>

          D.   In the event there is any conflict between the provisions of
this Article and one or more provisions of the Plan or any instrument issued
thereunder, the provisions of this Article shall be controlling.

     IX.  EFFECTIVE DATE AND TERM OF THE PLAN

          A.   The Plan was adopted by the Board on August 24, 2000, and shall
become effective at the Effective Time, provided no purchase rights granted
under the Plan shall be exercised, and no shares of Common Stock shall be issued
hereunder, until (i) the Plan shall have been approved by the stockholders of
the Corporation and (ii) the Corporation shall have complied with all applicable
requirements of the 1933 Act (including the registration of the shares of Common
Stock issuable under the Plan on a Form S-8 registration statement filed with
the Securities and Exchange Commission), all applicable listing requirements of
any stock exchange (or the Nasdaq National Market, if applicable) on which the
Common Stock is listed for trading and all other applicable requirements
established by law or regulation. In the event such stockholder approval is not
obtained, or such compliance is not effected, within twelve (12) months after
the date on which the Plan is adopted by the Board, the Plan shall terminate and
have no further force or effect, and all sums collected from Participants during
the initial offering period hereunder shall be refunded.

          B.   Unless sooner terminated by the Board, the Plan shall terminate
upon the earliest of (i) the last business day in January 2011, (ii) the date on
which all shares available for issuance under the Plan shall have been sold
pursuant to purchase rights exercised under the Plan or (iii) the date on which
all purchase rights are exercised in connection with a Change in Control. No
further purchase rights shall be granted or exercised, and no further payroll
deductions shall be collected, under the Plan following such termination.

     X.   AMENDMENT OF THE PLAN

          A.   The Board may alter, amend, suspend or terminate the Plan at any
time to become effective immediately following the close of any Purchase
Interval. However, the Plan may be amended or terminated immediately upon Board
action, if and to the extent necessary to assure that the Corporation will not
recognize, for financial reporting purposes, any compensation expense in
connection with the shares of Common Stock offered for purchase under the Plan,
should the financial accounting rules applicable to the Plan at the Effective
Time be subsequently revised so as to require the Corporation to recognize
compensation expense in the absence of such amendment or termination.

          B.   In no event may the Board effect any of the following amendments
or revisions to the Plan without the approval of the Corporation's stockholders:
(i) increase the number of shares of Common Stock issuable under the Plan,
except for permissible adjustments in the event of certain changes in the
Corporation's capitalization, (ii) alter the purchase price formula so as to
reduce the purchase price payable for the shares of Common Stock purchasable
under the Plan or (iii) modify the eligibility requirements for participation in
the Plan.

                                       8.
<PAGE>

     XI.  GENERAL PROVISIONS

          A.   All costs and expenses incurred in the administration of the Plan
shall be paid by the Corporation; however, each Plan Participant shall bear all
costs and expenses incurred by such individual in the sale or other disposition
of any shares purchased under the Plan.

          B.   Nothing in the Plan shall confer upon the Participant any right
to continue in the employ of the Corporation or any Corporate Affiliate for any
period of specific duration or interfere with or otherwise restrict in any way
the rights of the Corporation (or any Corporate Affiliate employing such person)
or of the Participant, which rights are hereby expressly reserved by each, to
terminate such person's employment at any time for any reason, with or without
cause.

          C.   The provisions of the Plan shall be governed by the laws of the
State of California without resort to that State's conflict-of-laws rules.

                                       9.
<PAGE>

                                  Schedule A

                         Corporations Participating in
                         Employee Stock Purchase Plan
                           As of the Effective Time
                           ------------------------

                            Align Technology, Inc.

<PAGE>

                                   APPENDIX
                                   --------

          The following definitions shall be in effect under the Plan:

          A.   Board shall mean the Corporation's Board of Directors.
               -----

          B.   Cash Earnings shall mean (i) the regular base salary paid to a
               -------------
Participant by one or more Participating Companies during such individual's
period of participation in one or more offering periods under the Plan plus (ii)
all overtime payments, bonuses, commissions, profit-sharing distributions or
other incentive-type payments received during such period. Such Cash Earnings
shall be calculated before deduction of (A) any income or employment tax
withholdings or (B) any contributions made by the Participant to any Code
Section 401(k) salary deferral plan or any Code Section 125 cafeteria benefit
program now or hereafter established by the Corporation or any Corporate
Affiliate. However, Cash Earnings shall not include any contributions made by
the Corporation or any Corporate Affiliate on the Participant's behalf to any
employee benefit or welfare plan now or hereafter established (other than Code
Section 401(k) or Code Section 125 contributions deducted from such Cash
Earnings).

          C.   Change in Control shall mean a change in ownership of the
               -----------------
Corporation pursuant to any of the following transactions:

               (i)   a merger, consolidation or other reorganization approved by
     the Corporation's stockholders, unless securities representing more than
                                     ------
     fifty percent (50%) of the total combined voting power of the voting
     securities of the successor corporation are immediately thereafter
     beneficially owned, directly or indirectly and in substantially the same
     proportion, by the persons who beneficially owned the Corporation's
     outstanding voting securities immediately prior to such transaction, or

               (ii)  the sale, transfer or other disposition of all or
     substantially all of the assets of the Corporation in complete liquidation
     or dissolution of the Corporation, or

               (iii) the acquisition, directly or indirectly, by a person or
related group of persons (other than the Corporation or a person that directly
or indirectly controls, is controlled by or is under common control with the
Corporation) of beneficial ownership (within the meaning of Rule 13d-3 of the
1934 Act) of securities possessing more than fifty percent (50%) of the total
combined voting power of the Corporation's outstanding securities pursuant to a
tender or exchange offer made directly to the Corporation's stockholders.

          D.   Code shall mean the Internal Revenue Code of 1986, as amended.
               ----

          E.   Common Stock shall mean the Corporation's common stock.
               ------------

                                     A-1.
<PAGE>

          F.   Corporate Affiliate shall mean any parent or subsidiary
               -------------------
corporation of the Corporation (as determined in accordance with Code Section
424), whether now existing or subsequently established.

          G.   Corporation shall mean Align Technology, Inc., a Delaware
               -----------
corporation, and any corporate successor to all or substantially all of the
assets or voting stock of Align Technology, Inc. that shall by appropriate
action adopt the Plan.

          H.   Effective Time shall mean the time at which the Underwriting
               --------------
Agreement is executed and the Common Stock priced for the initial public
offering of such Common Stock. Any Corporate Affiliate that becomes a
Participating Corporation after such Effective Time shall designate a subsequent
Effective Time with respect to its employee-Participants.

          I.   Eligible Employee shall mean any person who is employed by a
               -----------------
Participating Corporation on a basis under which he or she is regularly expected
to render more than twenty (20) hours of service per week for more than five (5)
months per calendar year for earnings considered wages under Code Section 3401
(a).

          J.   Fair Market Value per share of Common Stock on any relevant date
               -----------------
shall be determined in accordance with the following provisions:

               (i)   If the Common Stock is at the time traded on the Nasdaq
     National Market, then the Fair Market Value shall be the closing selling
     price per share of Common Stock on the date in question, as such price is
     reported by the National Association of Securities Dealers on the Nasdaq
     National Market and published in The Wall Street Journal. If there is no
                                      -----------------------
     closing selling price for the Common Stock on the date in question, then
     the Fair Market Value shall be the closing selling price on the last
     preceding date for which such quotation exists.

               (ii)  If the Common Stock is at the time listed on any Stock
     Exchange, then the Fair Market Value shall be the closing selling price per
     share of Common Stock on the date in question on the Stock Exchange
     determined by the Plan Administrator to be the primary market for the
     Common Stock, as such price is officially quoted in the composite tape of
     transactions on such exchange and published in The Wall Street Journal. If
                                                    -----------------------
     there is no closing selling price for the Common Stock on the date in
     question, then the Fair Market Value shall be the closing selling price on
     the last preceding date for which such quotation exists.

               (iii) For purposes of the initial offering period that begins at
     the Effective Time, the Fair Market Value shall be deemed to be equal to
     the price per share at which the Common Stock is sold in the initial public
     offering pursuant to the Underwriting Agreement.

          K.   1933 Act shall mean the Securities Act of 1933, as amended.
               --------

                                     A-2.
<PAGE>

          L.   Participant shall mean any Eligible Employee of a Participating
               -----------
Corporation who is actively participating in the Plan.

          M.   Participating Corporation shall mean the Corporation and such
              -------------------------
Corporate Affiliate or Affiliates as may be authorized from time to time by the
Board to extend the benefits of the Plan to their Eligible Employees. The
Participating Corporations in the Plan are listed in attached Schedule A.

          N.   Plan shall mean the Corporation's 2001 Employee Stock Purchase
               ----
Plan, as set forth in this document.

          O.   Plan Administrator shall mean the committee of two (2) or more
               ------------------
Board members appointed by the Board to administer the Plan.

          P.   Purchase Date shall mean the last business day of each Purchase
               -------------
Interval. The initial Purchase Date shall be July 31, 2001.

          Q.   Purchase Interval shall mean each successive six (6)-month period
               -----------------
within a particular offering period at the end of which there shall be purchased
shares of Common Stock on behalf of each Participant.

          R.   Stock Exchange shall mean either the American Stock Exchange or
               --------------
the New York Stock Exchange.

          S.   Underwriting Agreement shall mean the agreement between the
               ----------------------
Corporation and the underwriter or underwriters managing the initial public
offering of the Common Stock.

                                     A-3.EXHIBIT 4.1

             NUMBER

                                        CELSION                         SHARES

          COMMON STOCK

       INCORPORATED UNDER         CORPORATION           SEE REVERSE FOR CERTAIN
        THE LAWS OF THE                                       DEFINITIONS
       STATE OF DELAWARE

THIS CERTIFIES THAT
IS THE OWNER OF
FULLY PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK, $.01 PAR VALUE, OF

                               CELSION CORPORATION

transferable  on the books of the  Corporation by the holder hereof in person or
by  duly  authorized  attorney  upon  surrender  of  this  certificate  properly
endorsed.

This certificate is not valid until countersigned by the Transfer Agent.

WITNESS the facsimile seal of the  Corporation  and facsimile  signatures of its
duly authorized officers.

 Dated:                     [Celsion Corporation]

      /s/ JOHN MON         CORPORATE                 /s/ AUGUSTINE Y. CHEUNG
      SECRETARY            SEAL                      CHAIRMAN OF THE BOARD
                           DELAWARE]

Countersigned: AMERICAN STOCK TRANSFER & TRUST COMPANY

BY        Transfer Agent Authorized Officer

    The following  abbreviations,  when used in the  inscription  on the face of
this  Certificate,  shall be  construed  as though they were written out in full
according to applicable laws or regulations:

TEN COM   -- as tenants in common         UNIF GIFT MIN ACT--......Custodian....
TEN ENT   --as tenants by the entireties           .........  (Cust)     (Minor)

JT TEN   -- as joint tenants with right          under Uniform Gifts to Minors
            of survivorship and not as           ct.............................
            tenants in common            .........              (State)

    Additional abbreviations may also be used though not in the above list.

    For value received,___________________hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE
--------------------------------------

                                       26
<PAGE>

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  (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE OF ASSIGNEE)

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___________________________________shares  of the capital stock  represented
by the

within Certificate, and do hereby irrevocably constitute and appoint____________

____________________________________________________________________Attorney  to
transfer the said stock on the books of the within named  Corporation  with full
power of substitution in the premises.

Dated____________________

                                       -----------------------------------------
                              NOTICE:     THE SIGNATURE TO THIS ASSIGNMENT MUST
                                       CORRESPOND WITH THE NAME AS WRITTEN UPON
                                       THE FACE OF THE CERTIFICATE IN EVERY
                                       PARTICULAR, WITHOUT ALTERATION OR
                                       ENLARGEMENT OR ANY CHANGE WHATEVER.

                                       -----------------------------------------
          SIGNATURE(S)                 GUARANTEED:         THE
                                       SIGNATURE(S)  SHOULD BE
                                       GUARANTEED     BY    AN
                                       ELIGIBLE      GUARANTOR
                                       INSTITUTION     (BANKS,
                                       STOCKBROKERS,   SAVINGS
                                       AND  LOAN  ASSOCIATIONS
                                       AND CREDIT  UNIONS WITH
                                       MEMBERSHIP     IN    AN
                                       APPROVED      SIGNATURE
                                       GUARANTEE     MEDALLION
                                       PROGRAM),  PURSUANT  TO
                                       S.E.C. RULE 17Ad-15.

KEEP  THIS  CERTIFICATE  IN A SAFE  PLACE IF IT IS LOST,  STOLEN,  MUTILATED  OR
DESTROYED,  THE  CORPORATION  WILL REQUIRE A BOND OF INDEMNITY AS A CONDITION TO
THE ISSUANCE OF A REPLACEMENT CERTIFICATE.

                                       27

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00019-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00019-of-00352.parquet"}]]