Document:

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                                                                     EXHIBIT 4.2

           THIS WARRANT AND THE SHARES OF COMMON STOCK ISSUED UPON ITS
                   EXERCISE ARE SUBJECT TO THE RESTRICTIONS ON
                 TRANSFER SET FORTH IN SECTION 5 OF THIS WARRANT
      -------------------------------------------------------------------

Warrant No. 2                                            Number of Shares: 1,177
                                                         (subject to adjustment)
Date of Issuance: June 3, 2005

Original Issue Date (as defined in subsection
2(a)):  June 3, 2005

                             SS&C TECHNOLOGIES, INC.

                          Common Stock Purchase Warrant

                            (Void after June 3, 2010)

         SS&C Technologies, Inc., a Delaware corporation (the "Company"), for
value received, hereby certifies that Special Equity IV, L.P., or its registered
assigns (the "Registered Holder"), is entitled, subject to the terms and
conditions set forth below, to purchase from the Company, at any time or from
time to time on or after the date of issuance and on or before 5:00 p.m. (New
York time) on June 3, 2010, 1,177 shares of Common Stock, $0.01 par value per
share, of the Company ("Common Stock"), at a purchase price of $37.69 per share.
The shares purchasable upon exercise of this Warrant, and the purchase price per
share, each as adjusted from time to time pursuant to the provisions of this
Warrant, are hereinafter referred to as the "Warrant Shares" and the "Purchase
Price," respectively.

      1. Exercise.

         (a) Exercise for Cash. The Registered Holder may, at its option, elect
to exercise this Warrant, in whole or in part and at any time or from time to
time, by surrendering this Warrant, with the purchase form appended hereto as
Exhibit I duly executed by or on behalf of the Registered Holder, at the
principal office of the Company, or at such other office or agency as the
Company may designate, accompanied by payment in full, in lawful money of the
United States, of the Purchase Price payable in respect of the number of Warrant
Shares purchased upon such exercise.

         (b) Cashless Exercise.

             (i) The Registered Holder may, at its option, elect to exercise
this Warrant, in whole or in part and at any time or from time to time, on a
cashless basis, by surrendering this Warrant, with the purchase form appended
hereto as Exhibit I duly executed by or on behalf of the Registered Holder, at
the principal office of the Company, or at such other office or agency as the
Company may designate, by canceling a portion of this Warrant in payment of the
Purchase Price payable in respect of the number of Warrant Shares purchased upon
such exercise. In the event of an exercise pursuant to this subsection 1(b), the
number of
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Warrant Shares issued to the Registered Holder shall be determined according to
the following formula:

          X = Y(A-B)
              -----
                 A

         Where:  X =          the number of Warrant Shares that shall be issued
                              to the Registered Holder;

                 Y =          the number of Warrant Shares for which this
                              Warrant is being exercised (which shall
                              include both the number of Warrant Shares
                              issued to the Registered Holder and the
                              number of Warrant Shares subject to the portion
                              of the Warrant being cancelled in payment of the
                              Purchase Price);

                 A =          the Fair Market Value (as defined below) of one
                              share of Common Stock; and

                 B =          the Purchase Price then in effect.

             (ii) The Fair Market Value per share of Common Stock shall be
determined as follows:

                  (1) If the Common Stock is listed on a national securities
exchange, the Nasdaq National Market or another nationally recognized trading
system as of the Exercise Date, the Fair Market Value per share of Common Stock
shall be deemed to be the average of the high and low reported sale prices per
share of Common Stock thereon on the trading day immediately preceding the
Exercise Date (provided that if no such price is reported on such day, the Fair
Market Value per share of Common Stock shall be determined pursuant to clause
(2)).

                  (2) If the Common Stock is not listed on a national securities
exchange, the Nasdaq National Market or another nationally recognized trading
system as of the Exercise Date, the Fair Market Value per share of Common Stock
shall be deemed to be the amount most recently determined by the Board of
Directors of the Company (the "Board") to represent the fair market value per
share of the Common Stock (including without limitation a determination for
purposes of granting Common Stock options or issuing Common Stock under any
plan, agreement or arrangement with employees of the Company); and, upon request
of the Registered Holder, the Board (or a representative thereof) shall, as
promptly as reasonably practicable but in any event not later than 10 days after
such request, notify the Registered Holder of the Fair Market Value per share of
Common Stock and furnish the Registered Holder with reasonable documentation of
the Board's determination of such Fair Market Value. Notwithstanding the
foregoing, if the Board has not made such a determination within the three-month
period prior to the Exercise Date, then (A) the Board shall make, and shall
provide or cause to be provided to the Registered Holder notice of, a
determination of the Fair Market Value per share of the Common Stock within 15
days of a request by the Registered Holder that it do so, and (B) the exercise
of this Warrant pursuant to this subsection 1(b) shall be delayed until such
determination is made and notice thereof is provided to the Registered Holder.

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         (c) Exercise Date. Each exercise of this Warrant shall be deemed to
have been effected immediately prior to the close of business on the day on
which this Warrant shall have been surrendered to the Company as provided in
subsection 1(a) or 1(b) above (the "Exercise Date"). At such time, the person or
persons in whose name or names any certificates for Warrant Shares shall be
issuable upon such exercise as provided in subsection 1(d) below shall be deemed
to have become the holder or holders of record of the Warrant Shares represented
by such certificates.

         (d) Issuance of Certificates. As soon as practicable after the exercise
of this Warrant in whole or in part, and in any event within 10 days thereafter,
the Company, at its expense, will cause to be issued in the name of, and
delivered to, the Registered Holder, or as the Registered Holder (upon payment
by the Registered Holder of any applicable transfer taxes) may direct:

             (i) a certificate or certificates for the number of full Warrant
Shares to which the Registered Holder shall be entitled upon such exercise plus,
in lieu of any fractional share to which the Registered Holder would otherwise
be entitled, cash in an amount determined pursuant to Section 3 hereof; and

             (ii) in case such exercise is in part only, a new warrant or
warrants (dated the date hereof) of like tenor, calling in the aggregate on the
face or faces thereof for the number of Warrant Shares equal (without giving
effect to any adjustment therein) to the number of such shares called for on the
face of this Warrant minus the number of Warrant Shares for which this Warrant
was so exercised (which, in the case of an exercise pursuant to subsection 1(b),
shall include both the number of Warrant Shares issued to the Registered Holder
pursuant to such partial exercise and the number of Warrant Shares subject to
the portion of the Warrant being cancelled in payment of the Purchase Price).

      2. Adjustments.

         (a) Adjustment for Stock Splits and Combinations. If the Company shall
at any time or from time to time after the date on which this Warrant was first
issued (or, if this Warrant was issued upon partial exercise of, or in
replacement of, another warrant of like tenor, then the date on which such
original warrant was first issued) (either such date being referred to as the
"Original Issue Date") effect a subdivision of the outstanding Common Stock, the
Purchase Price then in effect immediately before that subdivision shall be
proportionately decreased. If the Company shall at any time or from time to time
after the Original Issue Date combine the outstanding shares of Common Stock,
the Purchase Price then in effect immediately before the combination shall be
proportionately increased. Any adjustment under this paragraph shall become
effective at the close of business on the date the subdivision or combination
becomes effective.

         (b) Adjustment for Certain Dividends and Distributions. In the event
the Company at any time, or from time to time after the Original Issue Date
shall make or issue, or fix a record date for the determination of holders of
Common Stock entitled to receive, a dividend or other distribution payable in
additional shares of Common Stock, then and in each such event the Purchase
Price then in effect immediately before such event shall be decreased as

                                     - 3 -
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of the time of such issuance or, in the event such a record date shall have been
fixed, as of the close of business on such record date, by multiplying the
Purchase Price then in effect by a fraction:

                  (1) the numerator of which shall be the total number of shares
of Common Stock issued and outstanding immediately prior to the time of such
issuance or the close of business on such record date, and

                  (2) the denominator of which shall be the total number of
shares of Common Stock issued and outstanding immediately prior to the time of
such issuance or the close of business on such record date plus the total number
of shares of Common Stock issuable in payment of such dividend or distribution;

provided, however, that if such record date shall have been fixed and such
dividend is not fully paid or if such distribution is not fully made on the date
fixed therefor, the Purchase Price shall be recomputed accordingly as of the
close of business on such record date and thereafter the Purchase Price shall be
adjusted pursuant to this paragraph as of the time of actual payment of such
dividends or distributions.

         (c) Adjustment in Number of Warrant Shares. When any adjustment is
required to be made in the Purchase Price pursuant to subsections 2(a) or 2(b),
the number of Warrant Shares purchasable upon the exercise of this Warrant shall
be changed to the number determined by dividing (i) an amount equal to the
number of shares issuable upon the exercise of this Warrant immediately prior to
such adjustment, multiplied by the Purchase Price in effect immediately prior to
such adjustment, by (ii) the Purchase Price in effect immediately after such
adjustment.

         (d) Adjustments for Other Dividends and Distributions. In the event the
Company at any time or from time to time after the Original Issue Date shall
make or issue, or fix a record date for the determination of holders of Common
Stock entitled to receive, a dividend or other distribution payable in
securities of the Company (other than shares of Common Stock) or in cash or
other property (other than regular cash dividends paid out of earnings or earned
surplus, determined in accordance with generally accepted accounting
principles), then and in each such event provision shall be made so that the
Registered Holder shall receive upon exercise hereof, in addition to the number
of shares of Common Stock issuable hereunder, the kind and amount of securities
of the Company, cash or other property which the Registered Holder would have
been entitled to receive had this Warrant been exercised on the date of such
event and had the Registered Holder thereafter, during the period from the date
of such event to and including the Exercise Date, retained any such securities
receivable during such period, giving application to all adjustments called for
during such period under this Section 2 with respect to the rights of the
Registered Holder.

         (e) Adjustment for Reorganization. If there shall occur any
reorganization, recapitalization, reclassification, consolidation or merger
involving the Company in which the Common Stock is converted into or exchanged
for securities, cash or other property (other than a transaction covered by
subsections 2(a), 2(b) or 2(d)) (collectively, a "Reorganization"), then,
following such Reorganization, the Registered Holder shall receive upon exercise
hereof the kind

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and amount of securities, cash or other property which the Registered Holder
would have been entitled to receive pursuant to such Reorganization if such
exercise had taken place immediately prior to such Reorganization. In any such
case, appropriate adjustment (as determined in good faith by the Board) shall be
made in the application of the provisions set forth herein with respect to the
rights and interests thereafter of the Registered Holder, to the end that the
provisions set forth in this Section 2 (including provisions with respect to
changes in and other adjustments of the Purchase Price) shall thereafter be
applicable, as nearly as reasonably may be, in relation to any securities, cash
or other property thereafter deliverable upon the exercise of this Warrant.

         (f) Certificate as to Adjustments. Upon the occurrence of each
adjustment or readjustment of the Purchase Price pursuant to this Section 2, the
Company at its expense shall, as promptly as reasonably practicable but in any
event not later than 10 days thereafter, compute such adjustment or readjustment
in accordance with the terms hereof and furnish to the Registered Holder a
certificate setting forth such adjustment or readjustment (including the kind
and amount of securities, cash or other property for which this Warrant shall be
exercisable and the Purchase Price) and showing in detail the facts upon which
such adjustment or readjustment is based. The Company shall, as promptly as
reasonably practicable after the written request at any time of the Registered
Holder (but in any event not later than 10 days thereafter), furnish or cause to
be furnished to the Registered Holder a certificate setting forth (i) the
Purchase Price then in effect and (ii) the number of shares of Common Stock and
the amount, if any, of other securities, cash or property which then would be
received upon the exercise of this Warrant.

      3. Fractional Shares. The Company shall not be required upon the exercise
of this Warrant to issue any fractional shares, but shall pay the value thereof
to the Registered Holder in cash on the basis of the Fair Market Value per share
of Common Stock, as determined pursuant to subsection 1(b)(ii) above.

      4. Investment Representations. The initial Registered Holder represents
and warrants to the Company as follows:

         (a) Investment. It is acquiring the Warrant, and (if and when it
exercises this Warrant) it will acquire the Warrant Shares, for its own account
for investment and not with a view to, or for sale in connection with, any
distribution thereof, nor with any present intention of distributing or selling
the same; and the Registered Holder has no present or contemplated agreement,
undertaking, arrangement, obligation, indebtedness or commitment providing for
the disposition thereof.

         (b) Accredited Investor. The Registered Holder is an "accredited
investor" as defined in Rule 501(a) under the Securities Act of 1933, as amended
(the "Act").

         (c) Experience. The Registered Holder has made such inquiry concerning
the Company and its business and personnel as it has deemed appropriate; and the
Registered Holder has sufficient knowledge and experience in finance and
business that it is capable of evaluating the risks and merits of its investment
in the Company.

      5. Transfers, etc.

                                     - 5 -
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         (a) This Warrant and the Warrant Shares shall not be sold or
transferred unless either (i) they first shall have been registered under the
Act, or (ii) the Company first shall have been furnished with an opinion of
legal counsel, reasonably satisfactory to the Company, to the effect that such
sale or transfer is exempt from the registration requirements of the Act.
Notwithstanding the foregoing, no registration or opinion of counsel shall be
required for (i) a transfer by a Registered Holder which is an entity to a
wholly owned subsidiary of such entity, a transfer by a Registered Holder which
is a partnership to a partner of such partnership or a retired partner of such
partnership or to the estate of any such partner or retired partner, or a
transfer by a Registered Holder which is a limited liability company to a member
of such limited liability company or a retired member or to the estate of any
such member or retired member, provided that the transferee in each case agrees
in writing to be subject to the terms of this Section 5, or (ii) a transfer made
in accordance with Rule 144 under the Act.

         (b) Each certificate representing Warrant Shares shall bear a legend
substantially in the following form:

             "The securities represented by this certificate have not been
             registered under the Securities Act of 1933, as amended, and may
             not be offered, sold or otherwise transferred, pledged or
             hypothecated unless and until such securities are registered under
             such Act or an opinion of counsel satisfactory to the Company is
             obtained to the effect that such registration is not required."

         The foregoing legend shall be removed from the certificates
representing any Warrant Shares, at the request of the holder thereof, at such
time as they become eligible for resale pursuant to Rule 144(k) under the Act.

         (c) The Company will maintain a register containing the name and
address of the Registered Holder of this Warrant. The Registered Holder may
change its address as shown on the warrant register by written notice to the
Company requesting such change.

         (d) Subject to the provisions of Section 5 hereof, this Warrant and all
rights hereunder are transferable, in whole or in part, upon surrender of this
Warrant with a properly executed assignment (in the form of Exhibit II hereto)
at the principal office of the Company (or, if another office or agency has been
designated by the Company for such purpose, then at such other office or
agency).

      6. No Impairment. The Company will not, by amendment of its charter or
through any reorganization, transfer of assets, consolidation, merger,
dissolution, issue or sale of securities or any other voluntary action, avoid or
seek to avoid the observance or performance of any of the terms of this Warrant,
but will at all times in good faith assist in the carrying out of all such terms
and in the taking of all such action as may be necessary or appropriate in order
to protect the rights of the Registered Holder against impairment.

                                     - 6 -
<PAGE>
      7. Notices of Record Date, etc. In the event:

         (a) the Company shall take a record of the holders of its Common Stock
(or other stock or securities at the time deliverable upon the exercise of this
Warrant) for the purpose of entitling or enabling them to receive any dividend
or other distribution, or to receive any right to subscribe for or purchase any
shares of stock of any class or any other securities, or to receive any other
right; or

         (b) of any capital reorganization of the Company, any reclassification
of the Common Stock of the Company, any consolidation or merger of the Company
with or into another corporation (other than a consolidation or merger in which
the Company is the surviving entity and its Common Stock is not converted into
or exchanged for any other securities or property), or any transfer of all or
substantially all of the assets of the Company; or

         (c) of the voluntary or involuntary dissolution, liquidation or
winding-up of the Company,

then, and in each such case, the Company will send or cause to be sent to the
Registered Holder a notice specifying, as the case may be, (i) the record date
for such dividend, distribution or right, and the amount and character of such
dividend, distribution or right, or (ii) the effective date on which such
reorganization, reclassification, consolidation, merger, transfer, dissolution,
liquidation or winding-up is to take place, and the time, if any is to be fixed,
as of which the holders of record of Common Stock (or such other stock or
securities at the time deliverable upon the exercise of this Warrant) shall be
entitled to exchange their shares of Common Stock (or such other stock or
securities) for securities or other property deliverable upon such
reorganization, reclassification, consolidation, merger, transfer, dissolution,
liquidation or winding-up. Such notice shall be sent at least 10 days prior to
the record date or effective date for the event specified in such notice.

      8. Reservation of Stock. The Company will at all times reserve and keep
available, solely for issuance and delivery upon the exercise of this Warrant,
such number of Warrant Shares and other securities, cash and/or property, as
from time to time shall be issuable upon the exercise of this Warrant. The
Company represents and warrants to the Registered Holder, and covenants and
agrees for the benefit of the Registered Holder that all Warrant Shares which
may be issued upon the exercise of this Warrant or otherwise hereunder will,
upon issuance, be duly authorized, validly issued, fully paid and non-assessable
and free from all taxes, liens, charges or other encumbrances of any nature
whatsoever created by or through the Company.

      9. Exchange or Replacement of Warrants.

         (a) Upon the surrender by the Registered Holder, properly endorsed, to
the Company at the principal office of the Company, the Company will, subject to
the provisions of Section 5 hereof, issue and deliver to or upon the order of
the Registered Holder, at the Company's expense, a new Warrant or Warrants of
like tenor, in the name of the Registered Holder or as the Registered Holder
(upon payment by the Registered Holder of any applicable transfer taxes) may
direct, calling in the aggregate on the face or faces thereof for the number of

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shares of Common Stock (or other securities, cash and/or property) then issuable
upon exercise of this Warrant.

         (b) Upon receipt of evidence reasonably satisfactory to the Company of
the loss, theft, destruction or mutilation of this Warrant and (in the case of
loss, theft or destruction) upon delivery of an indemnity agreement (with surety
if reasonably required) in an amount reasonably satisfactory to the Company, or
(in the case of mutilation) upon surrender and cancellation of this Warrant, the
Company will issue, in lieu thereof, a new Warrant of like tenor.

      10. Notices. All notices and other communications from the Company to the
Registered Holder in connection herewith shall be (i) mailed by certified or
registered mail, postage prepaid, (ii) sent via a reputable nationwide overnight
courier service guaranteeing next business day delivery, to the address last
furnished to the Company in writing by the Registered Holder, or (iii) delivered
via facsimile at the facsimile telephone number specified below. All notices and
other communications from the Registered Holder to the Company in connection
herewith shall be (i) mailed by certified or registered mail, postage prepaid,
(ii) sent via a reputable nationwide overnight courier service guaranteeing next
business day delivery, to the Company at its principal office set forth below,
or (iii) delivered via facsimile at the facsimile telephone number specified
below. If the Company or Registered Holder should at any time change the
location of its principal office to a place other than as set forth below or
change its facsimile number, it shall give prompt written notice to the other
party and thereafter all references in this Warrant to the location of its
principal office or its facsimile number at the particular time shall be as so
specified in such notice. All such notices and communications shall be deemed
delivered (i) two business days after being sent by certified or registered
mail, return receipt requested, postage prepaid, or (ii) one business day after
being sent via a reputable nationwide overnight courier service guaranteeing
next business day delivery (iii) the date of transmission, if such notice or
communication is delivered via facsimile at the facsimile telephone number
specified for notice prior to 5:00 p.m., eastern time, on a day on which the
Common Stock is traded (a "Trading Day"), or (iv) the Trading Day after the date
of transmission, if such notice or communication is delivered via facsimile at
the facsimile telephone number specified for notice later than 5:00 p.m.,
eastern time, on any date and earlier than 11:59 p.m., eastern time, on such
date. The addresses for such communications shall be with respect to the
Registered Holder of this Warrant or of Warrant Shares issued pursuant hereto,
addressed to such Registered Holder at its last known address or facsimile
number appearing on the books of the Company maintained for such purposes, or
with respect to the Company, addressed to:

                        SS&C Technologies, Inc.
                        80 Lamberton Road
                        Windsor, CT  06085
                        Attention:  Stephen V.R. Whitman
                        Tel. No.:  (510) 795-2900
                        Fax. No:  (860) 298-4969

      11. No Rights as Stockholder. Until the exercise of this Warrant, the
Registered Holder shall not have or exercise any rights by virtue hereof as a
stockholder of the Company. Notwithstanding the foregoing, in the event (i) the
Company effects a split of the Common Stock

                                     - 8 -
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by means of a stock dividend and the Purchase Price of and the number of Warrant
Shares are adjusted as of the date of the distribution of the dividend (rather
than as of the record date for such dividend), and (ii) the Registered Holder
exercises this Warrant between the record date and the distribution date for
such stock dividend, the Registered Holder shall be entitled to receive, on the
distribution date, the stock dividend with respect to the shares of Common Stock
acquired upon such exercise, notwithstanding the fact that such shares were not
outstanding as of the close of business on the record date for such stock
dividend.

      12. Amendment or Waiver. This Warrant is one of a series of Warrants
issued by the Company, all dated the date hereof and of like tenor, except as to
the number of shares of Common Stock subject thereto (collectively, the "Company
Warrants"). Any term of this Warrant may be amended or waived (either generally
or in a particular instance and either retroactively or prospectively) with the
written consent of the Company and the holders of Company Warrants representing
at least 51% of the number of shares of Common Stock then subject to outstanding
Company Warrants. Notwithstanding the foregoing, (a) this Warrant may be amended
and the observance of any term hereunder may be waived without the written
consent of the Registered Holder only in a manner which applies to all Company
Warrants in the same fashion and (b) the number of Warrant Shares subject to
this Warrant and the Purchase Price of this Warrant may not be amended, and the
right to exercise this Warrant may not be waived, without the written consent of
the Registered Holder (it being agreed that an amendment to or waiver under any
of the provisions of Section 2 of this Warrant shall not be considered an
amendment of the number of Warrant Shares or the Purchase Price). The Company
shall give prompt written notice to the Registered Holder of any amendment
hereof or waiver hereunder that was effected without the Registered Holder's
written consent. No waivers of any term, condition or provision of this Warrant,
in any one or more instances, shall be deemed to be, or construed as, a further
or continuing waiver of any such term, condition or provision.

      13. Section Headings. The section headings in this Warrant are for the
convenience of the parties and in no way alter, modify, amend, limit or restrict
the contractual obligations of the parties.

      14. Governing Law. This Warrant will be governed by and construed in
accordance with the internal laws of the State of Delaware (without reference to
the conflicts of law provisions thereof).

      15. Facsimile Signatures. This Warrant may be executed by facsimile
signature.

      EXECUTED as of the Date of Issuance indicated above.

                                            SS&C TECHNOLOGIES, INC.

                                            By:  /s/ Normand A. Boulanger
                                                 ------------------------

                                            Title:  President and COO
                                                    ---------------------

ATTEST:

/s/ Cheri L. Ferris
-----------------------

                                     - 9 -
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                                                                       EXHIBIT I

                                  PURCHASE FORM

To:_________________                                          Dated:____________

         The undersigned, pursuant to the provisions set forth in the attached
Warrant (No. ___), hereby elects to purchase (check applicable box):

         0    ____ shares of the Common Stock of SS&C Technologies, Inc. covered
by such Warrant; or

         0    the maximum number of shares of Common Stock covered by such
Warrant pursuant to the cashless exercise procedure set forth in subsection
1(b).

         The undersigned herewith makes payment of the full purchase price for
such shares at the price per share provided for in such Warrant. Such payment
takes the form of (check applicable box or boxes):

         0    $______ in lawful money of the United States; and/or

         0    the cancellation of such portion of the attached Warrant as is
              exercisable for a total of _____ Warrant Shares (using a Fair
              Market Value of $_____ per share for purposes of this
              calculation); and/or

         0    the cancellation of such number of Warrant Shares as is
              necessary, in accordance with the formula set forth in
              subsection 1(b), to exercise this Warrant with respect to the
              maximum number of Warrant Shares purchasable pursuant to the
              cashless exercise procedure set forth in subsection 1(b).

         The undersigned confirms the continuing validity of, and reaffirms as
of the date hereof, its representations and warranties set forth in Section 4 of
the Warrant.

                                            Signature:
                                                        ---------------------
                                            Address:
                                                      -----------------------

                                                      -----------------------

                                     - 10 -
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                                                                      EXHIBIT II

                                 ASSIGNMENT FORM

         FOR VALUE RECEIVED, ________________________________________ hereby
sells, assigns and transfers all of the rights of the undersigned under the
attached Warrant (No. ____) with respect to the number of shares of Common Stock
of SS&C Technologies, Inc. covered thereby set forth below, unto:

Name of Assignee                   Address                  No. of Shares

Dated:                                       Signature:
      ---------------------                            -------------------------

Signature Guaranteed:

By:
    ----------------------

The signature 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 Rule 17Ad-15
under the Securities Exchange Act of 1934.

                                     - 11 -<PAGE>

                                                                    EXHIBIT 10.5

                            FOURTH AMENDMENT TO LEASE

      THIS FOURTH AMENDMENT TO LEASE (this "AMENDMENT") is made as of June 7,
2005 between NEW BOSTON LAMBERTON LIMITED PARTNERSHIP, with a principal place of
business at 60 State Street, Suite 1500, Boston, Massachusetts 02109-1803
("LESSOR") and SS&C TECHNOLOGIES, INC. ("LESSEE").

      WHEREAS, Lessor is the owner of a building located at 80 Lamberton Road
(the "BUILDING") situated on a parcel of land in Windsor, Connecticut
(collectively the "PROPERTY");

      WHEREAS, Monarch Life Insurance Company, Lessor's predecessor-in-interest
and Lessee entered into a certain lease for space on the first and second floors
of the Building dated September 23, 1997 (the "ORIGINAL LEASE"), as amended by a
certain First Amendment to Lease dated November 18, 1997, a certain Second
Amendment of Lease dated April, 1999, and as further amended by a certain Third
Amendment to Lease effective as of July 1, 1999 (collectively referred to as the
"LEASE");

      WHEREAS, pursuant to the terms of the Lease, Lessee occupies 73,457 square
feet of space (the "PREMISES");

      WHEREAS, Lessee desires to expand the Premises by an additional 1,398
square feet of space (the "DATA CENTER SPACE").

      NOW, THEREFORE, for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, and for the mutual promises
hereinafter set forth, Lessor and Lessee agree as follows:

      1. Section 2(a) of the Lease is hereby amended by inserting the following
after the second sentence of the first paragraph thereof:

      "Effective as of the later of July 1, 2005 or the date enherent
      Corporation ("ENHERENT") vacates the Data Center Space (as hereinafter
      defined) (the "DATA CENTER SPACE COMMENCEMENT DATE"), the Premises shall
      include an additional 1,398 square feet of net rentable area on the first
      floor of the Building (the "DATA CENTER SPACE"), as more

                                       -1-
<PAGE>

      particularly set forth on Exhibit A-3 attached hereto and incorporated
      hereby. The Premises shall thereafter consist of 74,855 square feet of net
      rentable."

      2. Section 4(a) of the Lease is hereby amended by inserting the following
after Section 4(a) (iii):

      "(iii) In addition to the Minimum Annual Rent set forth in Section
      4(a)(i), (ii) and (iii), Lessee shall pay rent with respect to the Data
      Center Space only as set forth below:

<TABLE>
<CAPTION>
     Period            Annual Rent per Square Foot           Monthly Rent
----------------       ---------------------------           ------------
<S>                    <C>                                   <C>
7/1/05 - 1/14/08                 $14.00                        $1,631.00
</TABLE>

      3. Section 5(a) of the Lease is hereby amended by inserting the following
after the third sentence of the first paragraph thereof:

      "Effective as of July 1, 2005, "Lessee's Proportionate Share" shall be
      47.68%."

      4. Section 5(b) of the Lease is hereby amended by inserting the following
after the first sentence thereof:

      "With respect to the Data Center Space only, Lessee shall pay the
      Impositions, if any, in excess of the twelve (12) month period commencing
      January 1, 2005 and ending on December 31, 2005 (the "Data Center Tax Base
      Year")."

      5. Section 5(c) of the Lease is hereby amended by inserting the following
after the first sentence of the first paragraph thereof:

      "With respect to the Data Center Space only, Lessee shall pay the
      Operating Expenses, if any, in excess of the twelve (12) month period
      commencing January 1, 2005 and ending on December 31, 2005 (the "Data
      Center Operating Expense Base Year")."

      6. Tenant accepts the Data Center Space in its "As Is" condition. Landlord
shall have no obligation to perform any tenant improvements to the Data Center
Space. As of the Data Center Space Commencement Date, Tenant shall, at its sole
cost and expense, (a) eliminate the rear door currently connecting the Data
Center Space to the premises currently occupied by

                                        2
<PAGE>

enherent, and (b), if necessary to comply with any applicable laws, rules or
regulations, construct a corridor extension to facilitate a second means of
access to, and egress from, the Data Center Space.

      7. Section 31 of the Lease is hereby amended by deleting Lessor's contact
information therein and inserting the following in lieu thereof:

      "To Landlord:    New Boston Lamberton Limited Partnership
                       60 State Street, Suite 1500
                       Boston, Massachusetts 02109-1803
                       facsimile 617-227-4727
                       telephone 617-723-7760

      with a copy to:  Rappaport, Aserkoff & Gelles
                       60 State Street, Suite 1525
                       Boston, Massachusetts 02109-1803
                       facsimile 617-227-4727
                       telephone 617-227-7345

      with a copy to:  New Boston Management Services, Inc.
                       100 Pearl Street
                       Hartford, Connecticut 06103
                       facsimile 860-293-3310
                       telephone 860-293-3300

      8. Lessor and Lessee hereby acknowledge that the Data Center Space is
currently being leased to enherent pursuant to a written lease (the "ENHERENT
LEASE"). It shall be a condition precedent to this Amendment that enherent and
Lessor enter into and execute an agreement whereby enherent vacates the Data
Center Space. In the event that Lessor is not able

                                        3
<PAGE>

to deliver the Data Center Space to the Lessee on or before September 1, 2005,
this Amendment shall be null and void and of no further force and effect,
provided, however, that the failure by Lessor to deliver the Data Center Space
shall in no way be construed as a default by Lessor under the Lease.

      Executed as of the date first above written.

                                           LESSOR:

                                           NEW BOSTON LAMBERTON LIMITED
                                           PARTNERSHIP

                                           BY: NEW BOSTON FUND IV, INC.
                                               Its General Partner

/s/ Diane Elgart
----------------------------               By: /s/ Gary Hofstetter
Witness                                        -----------------------------

                                                  hereunto duly authorized

                                           LESSEE: Hereunto Duly Authorized
                                                   Gary J. Hofstetter

                                           SS&C TECHNOLOGIES, INC.

/s/ George G. Roller
----------------------------               By: /s/ Patrick J. Pedonti
Witness                                        ---------------------------
                                               PATRICK J. PEDONTI
                                               Its CFO

                                        4
<PAGE>

                                   EXHIBIT A-3

                                Data Center Space

                                    [GRAPHIC]

                                                                     Exhibit A-3

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00088-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00088-of-00352.parquet"}]]