Document:

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                                                                   EXHIBIT 10.28
                   AMERICAN INDUSTRIAL REAL ESTATE ASSOCIATION

                                STANDARD SUBLEASE

                 (Long form to be used with pre-1996 AIR leases)

      1. PARTIES. This Sublease, dated, for reference purposes only, October 7,
2002, is made by and between Inter-Tel Technologies, Inc. ("SUBLESSOR") and
Vixel Corporation ("SUBLESSEE").

      2. PREMISES. Sublessor hereby subleases to Sublessee and Sublessee hereby
subleases from Sublessor for the term, at the rental, and upon all of the
conditions set forth herein, that certain real property, including all
improvements therein, and commonly known by the street address of 10 Faraday,
Suite 200 located in the County of Orange, State of California, and generally
described as (describe briefly the nature of the property) the whole second
floor of the 2-story, R&D building at 10 Faraday, Irvine, 92618 ("Premises").

      3. TERM.

         3.1 TERM. The term of this Sublease shall be for two (2) years, seven
(7) months commencing on December 1, 2002 and ending on June 30, 2005 unless
sooner terminated pursuant to any provision hereof.

         3.2 DELAY IN COMMENCEMENT. Sublessor agrees to use its best
commercially reasonable efforts to deliver possession of the Premises by the
commencement date. If, despite said efforts, Sublessor is unable to deliver
possession as agreed, Sublessor shall not be subject to any liability therefor,
nor shall such failure affect the validity of this Sublease. Sublessee shall
not, however, be obligated to pay Rent or perform its other obligations until it
receives possession of the Premises. If possession is not delivered within sixty
days after the commencement date, Sublessee may, at its option, by notice in
writing within ten days after the end of such sixty day period, cancel this
Sublease, in which event the Parties shall be discharged from all obligations
hereunder, If such written notice is not received by Sublessor within said ten
day period, Sublessee's right to cancel shall terminate. Except as otherwise
provided, if possession is not tendered to Sublessee when required and Sublessee
does not terminate this Sublease, as aforesaid, any period of rent abatement
that Sublessee would otherwise have enjoyed shall run from the date of delivery
of possession and continue for a period equal to what Sublessee would otherwise
have enjoyed under the terms hereof, but minus any days of delay caused by the
acts or omissions of Sublessee. If possession is not delivered within 120 days
after the commencement date, this Sublease shall automatically terminate unless
the Parties agree, in writing, to the contrary.

      4. RENT.

         4.1 BASE RENT. Sublessee shall pay to Sublessor as Base Rent for the
Premises equal monthly payments of $8,333.33 in advance, on the 1st day of each
month of the term hereof. Sublessee shall pay Sublessor upon the execution
hereof $8,333.33 as Base Rent for December 1, 2002 (See also addendum section
14). Base Rent for any period during the term hereof which is for less than one
month shall be a pro rata portion of the monthly installment.

         4.2 RENT DEFINED. All monetary obligations of Sublessee to Sublessor
under the terms of this Sublease (except for the Security Deposit) are deemed to
be rent ("RENT"). Rent shall be payable in lawful money of the United States to
Sublessor at the address stated herein or to such other persons or at such other
places as Sublessor may designate in writing.

      5. SECURITY DEPOSIT. Sublessee shall deposit with Sublessor upon execution
hereof $25,000.00 as security for Sublessee's faithful performance of
Sublessee's obligations hereunder. If Sublessee fails to pay Rent or other
charges due hereunder, or otherwise defaults with respect to any provision of
this Sublease, Sublessor may use, apply or retain all or any portion of said
deposit for the payment of any Rent or other charge in default or for the
payment of any other sum to which Sublessor may become obligated by reason of
Sublessee's default, or to compensate Sublessor for any loss or damage which
Sublessor may suffer thereby. If Sublessor so uses or applies all or any portion
of said deposit, Sublessee shall within ten days after written demand therefore
forward to Sublessor an amount sufficient to restore said Deposit to the full
amount provided for herein and Sublessee's failure to do so shall be a material
breach of this Sublease. Sublessor shall not be required to keep said Deposit
separate from its general accounts. If Sublessee performs all of Sublessee's
obligations hereunder, said Deposit, or so much thereof as has not therefore
been applied by Sublessor, shall be returned, without payment of Interest to
Sublessee (or at Sublessor's option, to the last assignee, if any, of
Sublessee's interest hereunder) at the expiration of the term hereof, and after
Sublessee has vacated the Premises. No trust relationship is created herein
between Sublessor and Sublessee with respect to said Security Deposit.

      6. USE.

         6.1 AGREED USE. The Premises shall be used and occupied only for
general office use and for no other purpose.

         6.2 COMPLIANCE. Sublessor warrants that the improvements on the
Premises comply with all applicable covenants or restrictions of record and
applicable building codes, regulations and ordinances ("APPLICABLE
REQUIREMENTS") in effect on the commencement date. Said warranty does not apply
to the use to which Sublessee will put the Premises or to any alterations or
utility installations made or to be made by Sublessee. NOTE: Sublessee is
responsible for determining whether or not the zoning is appropriate for its
intended use, and acknowledges that past uses of the Premises may no longer be
allowed. If the Premises do not comply with said warranty, Sublessor shall,
except as otherwise provided, promptly after receipt of written notice from
Sublessee setting forth with specificity the nature and extent of such
non-compliance, rectify the same at Sublessor's expense. If Sublessee does not
give Sublessor written notice of a non-compliance with this warranty within six
months following the commencement date, correction of that non-compliance shall
be the obligation of Sublessee at its sole cost and expense. If the Applicable
Requirements are hereafter changed so as to require during the term of this
Sublease the construction of an addition to or an alteration of the Building,
the remediation of any Hazardous Substance, or the reinforcement or other
physical modification of the Building ("CAPITAL EXPENDITURE"), Sublessor and
Sublessee shall allocate the cost of such work as follows:

         (a) If such Capital Expenditures are required as a result of the
specific and unique use of the Premises by Sublessee as compared with uses by
tenants in general, Sublessee shall be fully responsible for the cost thereof
provided, however, that if such Capital Expenditure is required during the last
two years of this Sublease and the cost thereof exceeds six months' Base Rent,
Sublessee may instead terminate this Sublease unless Sublessor notifies
Sublessee in writing, within ten days after receipt of Sublessees's termination
notice that Sublessor has elected to pay the difference between the actual cost
thereof and the amount equal to six months' Base Rent. If the Parties elect
termination, Sublessee shall immediately cease the use of the Premises which
requires such Capital Expenditure and deliver to Sublessor written notice
specifying a termination date at least ninety days thereafter. Such termination
date shall, however, in no event be earlier then the last day that Sublessee
could legally utilize the Premises without commencing such Capital Expenditure.

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         (b) If such Capital Expenditure is not the result of the specific and
unique use of the Premises by Sublessee (such as governmentally mandated seismic
modifications, then Sublessor shall pay for said Capital Expenditure and the
cost thereof shall be prorated between the Sublessor and Sublessee and Sublessee
shall only be obligated to pay, each month during the remainder of the term of
this Sublease, on the date on which Rent is due, an amount equal to the product
of multiplying the cost of such Capital Expenditure by a fraction, the numerator
of which is one, and the denominator of which is the number of months of the
useful life of such Capital Expenditure as such useful life is specified
pursuant to Federal income tax regulations or guidelines for depreciation
thereof (including interest on the unamortized balance as is then commercially
reasonable in the judgment of Sublessor's accountant), with Sublessee reserving
the right to prepay its obligation at any time. Provided, however, that if such
Capital Expenditure is required during the last two years of this Sublease or if
Sublessor reasonably determines that it is not economically feasible to pay its
share thereof, Sublessor shall have the option to terminate this Sublease upon
ninety days prior written notice to Sublessee unless Sublessee notifies
Sublessor, in writing, within ten days alter receipt of Sublessor's termination
notice that Sublessee will pay for such Capital Expenditure. If Sublessor does
not elect to terminate, and fails to tender its share of any such Capital
Expenditure, Sublessee may advance such funds and deduct same, with interest,
from Rent until Sublessor's share of such costs have been fully paid. If
Sublessee is unable to finance Sublessor's share, or if the balance of the Rent
due and payable for the remainder of this Sublease is not sufficient to fully
reimburse Sublessee on an offset basis, Sublessee shall have the right to
terminate this Sublease upon ten days written notice to Sublessor.

         (c) Notwithstanding the above, the provisions concerning Capital
Expenditures are intended to apply only to non-voluntary, unexpected, and new
Applicable Requirements. If the Capital Expenditures are instead triggered by
Sublessee as a result of an actual or proposed change in use, change In
intensity of use, or modification to the Premises then, and in that event,
Sublessee shall be fully responsible for the cost thereof, and Sublessee shall
not have any right to terminate this Sublease.

         6.3 ACCEPTANCE OF PREMISES AND LESSEE. Sublessee acknowledges that:

         (a) it has been advised by Brokers to satisfy itself with respect to
the condition of the Premises (including but not limited to the electrical, HVAC
and fire sprinkler systems, security, environmental aspects, and compliance with
Applicable Requirements), and their suitability for Sublessee's intended use,

         (b) Sublessee has made such investigation as it deems necessary with
reference to such matters and assumes all responsibility therefor as the same
relate to its occupancy of the Premises, and

         (c) neither Sublessor, Sublessor's agents, nor any Broker has made any
oral or written representations or warranties with respect to said matters other
than as set forth in this Sublease.

In addition, Sublessor acknowledges that:

         (a) Broker has made no representations, promises or warranties
concerning Sublessee's ability to honor the Sublease or suitability to occupy
the Premises, and

         (b) it is Sublessor's sole responsibility to investigate the financial
capability and/or suitability of all proposed tenants.

      7. MASTER LEASE

         7.1 Sublessor is the lessee of the Premises by virtue of a lease,
hereinafter the "MASTER LEASE", a copy of which is attached hereto marked
Exhibit 1, wherein 10 Faraday Partners, a California general partnership is the
lessor, hereinafter the "MASTER LESSOR"

         7.2 This Sublease is and shall be at all times subject and subordinate
to the Master Lease.

         7.3 The terms, conditions and respective obligations of Sublessor and
Sublessee to each other under this Sublease shall be the terms and conditions of
the Master Lease except for those provisions of the Master Lease which are
directly contradicted by this Sublease in which event the terms of this Sublease
document shall control over the Master Lease. Therefore, for the purposes of
this Sublease, wherever in the Master Lease the word "Lessor" is used it shall
be deemed to mean the Sublessor herein and wherever in the Master Lease the word
"Lessee" is used it shall be deemed to mean the Sublessee herein.

         7.4 During the term of this Sublease and for all periods subsequent for
obligations which have arisen prior to the termination of this Sublease,
Sublessee does hereby expressly assume and agree to perform and comply with, for
the benefit of Sublessor and Master Lessor, each and every obligation of
Sublessor under the Master Lease except for the following paragraphs which are
excluded therefrom: Sections 7.1(b), 7.1(c), 10.2, and 11.

         7.5 The obligations that Sublessee has assumed under paragraph 7.4
hereof are hereinafter referred to as the "SUBLESSEE'S ASSUMED OBLIGATIONS". The
obligations that Sublessee has not assumed under paragraph 7.4 hereof are
hereinafter referred to as the "SUBLESSOR'S REMAINING OBLIGATIONS".

         7.6 Sublessee shall hold Sublessor free and harmless from all
liability, judgments, costs, damages, claims or demands, including reasonable
attorneys fees, arising out of Sublessee's failure to comply with or perform
Sublessee's Assumed Obligations.

         7.7 Sublessor agrees to maintain the Master Lease during the entire
term of this Sublease, subject, however, to any earlier termination of the
Master Lease without the fault of the Sublessor, and to comply with or perform
Sublessor's Remaining Obligations and to hold Sublessee free and harmless from
all liability, judgments, costs, damages, claims or demands arising out of
Sublessor's failure to comply with or perform Sublessor's Remaining Obligations.

         7.8 Sublessor represents to Sublessee that the Master Lease is in full
force and effect and that no default exists on the part of any Party to the
Master Lease.

     8.  ASSIGNMENT OF SUBLEASE AND DEFAULT.
         8.1 Sublessor hereby assigns and transfers to Master Lessor the
Sublessor's interest in this Sublease, subject however to the provisions of
Paragraph 8.2 hereof.

         8.2 Master Lessor, by executing this document, agrees that until a
Default shall occur in the performance of Sublessor's Obligations under the
Master Lease, that Sublessor may receive, collect and enjoy the Rent accruing
under this Sublease. However, it Sublessor shall Default in the performance of
its obligations to Master Lessor then Master Lessor may, at its option, receive
and collect, directly from Sublessee, all Rent owing and to be owed under this
Sublease. Master Lessor shall not, by reason of this assignment of the Sublease
nor by reason of the collection of the Rent from the Sublessee, be deemed liable
to Sublessee for any failure of the Sublessor to perform and comply with
Sublessor's Remaining Obligations.

         8.3 Sublessor hereby irrevocably authorizes and directs Sublessee upon
receipt of any written notice from the Master Lessor stating that a Default
exists in the performance of Sublessor's obligations under the Master Lease, to
pay to Master Lessor the Real due and to become due under the Sublease.
Sublessor agrees that Sublessee shall have the right to rely upon any such
statement and request from Master Lessor, and that Sublessee shall pay such Rent
to Master Lessor without any obligation or right to inquire as to whether such

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Default exists and notwithstanding any notice from or claim from Sublessor to
the contrary and Sublessor shall have no right or claim against Sublessee for
any such Rent so paid by Sublessee.

         8.4 No changes or modifications shall be made to this Sublease without
the consent of Master Lessor.

      9. CONSENT OF MASTER LESSOR.

      9.1 In the event that the Master Lease requires that Sublessor obtain the
consent of Master Lessor to any subletting by Sublessor then, this Sublease
shall not be effective unless, within ten days of the date hereof, Master Lessor
signs this Sublease thereby giving its consent to this Subletting.

         9.2 In the event that the obligations of the Sublessor under the Master
Lease have been guaranteed by third parties then neither this Sublease, nor the
Master Lessor's consent, shall be effective unless, within 10 day of the date
hereof, said guarantors sign this Sublease thereby giving their consent to this
Sublease.

         9.3 In the event that Master Lessor does give such consent then:

            (a) Such consent shall not release Sublessor of its obligations or
alter the primary liability of Sublessor to pay the Rent and perform and comply
with all of the obligations of Sublessor to be performed under the Master Lease.

            (b) The acceptance of Rent by Master Lessor from Sublessee or anyone
else liable under the Master Lease shall not be deemed a waiver by Master Lessor
of any provisions of the Master Lease.

            (c) The consent to this Sublease shall not constitute a consent to
any subsequent subletting or assignment.

            (d) In the event of any Default of Sublessor under the Master Lease,
Master Lessor may proceed directly against Sublessor, any guarantors or anyone
else liable under the Master Lease or this Sublease without first exhausting
Master Lessor's remedies against any other person or entity liable thereon to
Master Lessor.

            (e) Master Lessor may consent to subsequent sublettings and
assignments of the Master Lease or this Sublease or any amendments or
modifications thereto without notifying Sublessor or anyone else liable under
the Master Lease and without obtaining their consent and such action shall not
relieve such persons from liability.

            (f) In the event that Sublessor shall Default in its obligations
under the Master Lease, then Master Lessor, at its option and without being
obligated to do so, may require Sublessee to attorn to Master Lessor in which
event Master Lessor shall undertake the obligations of Sublessor under this
Sublease from the time of the exercise of said option to termination of this
Sublease but Master Lessor shall not be liable for any prepaid Rent nor any
Security Deposit paid by Sublessee, nor shall Master Lessor be liable for any
other Defaults of the Sublessor under the Sublease.

         9.4 The signatures of the Master Lessor and any Guarantors of Sublessor
at the end of this document shall constitute their consent to the terms of this
Sublease.

         9.5 Master Lessor acknowledges that, to the best of Master Lessor's
knowledge, no Default presently exists under the Master Lease of obligations to
be performed by Sublessor and that the Master Lease is in full force and effect.

         9.6 In the event that Sublessor Defaults under its obligations to be
performed under the Master Lease by Sublessor, Master Lessor agrees to deliver
to Sublessee a copy of any such notice of default. Sublessee shall have the
right to cure any Default of Sublessor described in any notice of default within
ten days after service of such notice of default on Sublessee. If such Default
is cured by Sublessee then Sublessee shall have the right of reimbursement and
offset from and against Sublessor.

     10. BROKERS FEE

         10.1     Intentionally omitted.

                  Per separate agreement.

         10.2 Sublessor agrees that if Sublessee exercises any option or right
of first refusal as granted by Sublessor herein, or any option or right
substantially similar thereto, either to extend the term of this Sublease, to
renew this Sublease, to purchase the Premises, or to lease or purchase adjacent
property which Sublessor may own or in which Sublessor has an interest, then
Sublessor shall pay to Broker a fee in accordance with the schedule of Broker in
effect at the time of the execution of this Sublease. Notwithstanding the
foregoing, Sublessor's obligation under this Paragraph 10.2 is limited to a
transaction in which Sublessor is acting as a Sublessor, lessor or seller.

         10.3 Master Lessor agrees that if Sublessee shall exercise any option
or right of first refusal granted to Sublessee by Master Lessor in connection
with this Sublease, or any option or right substantially similar thereto, either
to extend or renew the Master Lease, to purchase the Premises or any part
thereof, or to lease or purchase adjacent property which Master Lessor may own
or in which Master Lessor has an interest, or if Broker Is the procuring cause
of any other lease or sale entered into between Sublessee and Master Lessor
pertaining to the Premises, any part thereof, or any adjacent property which
Master Lessor owns or in which it has an interest, then as to any of said
transactions, Master Lessor shall pay to Broker a fee, in cash, in accordance
with the schedule of Broker in effect at the time of the execution of this
Sublease.

         10.4 Any fee due from Sublessor or Master Lessor hereunder shall be due
and payable upon the exercise of any option to extend or renew, upon the
execution of any new lease, or, in the event of a purchase, at the close of
escrow.

         10.5 Any transferee of Sublessor's interest in this Sublease, or of
Master Lessor's interest in the Master Lease, by accepting an assignment
thereof, shall be deemed to have assumed the respective obligations of Sublessor
or Master Lessor under this Paragraph 10. Broker shall be deemed to be a
third-party beneficiary of this paragraph 10.

     11. ATTORNEY'S FEES. If any party or the Broker named herein brings an
action to enforce the terms hereof or to declare rights hereunder, the
prevailing party in any such action, on trial and appeal, shall be entitled to
his reasonable attorney's lees to be paid by the losing party as fixed by the
Court,

     12.  Intentionally omitted.
         See additional provisions in addendum.

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ATTENTION: NO REPRESENTATION OR RECOMMENDATION IS MADE BY THE AMERICAN
INDUSTRIAL REAL ESTATE ASSOCIATION OR BY ANY REAL ESTATE BROKER AS TO THE LEGAL
SUFFICIENCY, LEGAL EFFECT, OR TAX CONSEQUENCES OF THIS SUBLEASE OR THE
TRANSACTION TO WHICH IT RELATES. THE PARTIES ARE URGED TO:

l. SEEK ADVICE OF COUNSEL AS TO THE LEGAL AND TAX CONSEQUENCES OF THIS SUBLEASE.

2. RETAIN APPROPRIATE CONSULTANTS TO REVIEW AND INVESTIGATE THE CONDITION OF THE
PREMISES. SAID INVESTIGATION SHOULD INCLUDE BUT NOT BE LIMITED TO: THE POSSIBLE
PRESENCE OF HAZARDOUS SUBSTANCES, THE ZONING OF THE PROPERTY, THE STRUCTURAL
INTEGRITY, THE CONDITION OF THE ROOF AND OPERATING SYSTEMS, AND THE SUITABILITY
OF THE PREMISES FOR SUBLESSEE'S INTENDED USE.

WARNING: IF THE SUBJECT PROPERTY IS LOCATED IN A STATE OTHER THAN CALIFORNIA,
CERTAIN PROVISIONS OF THE SUBLEASE MAY NEED TO BE REVISED TO COMPLY WITH THE
LAWS OF THE STATE IN WHICH THE PROPERTY IS LOCATED.
<TABLE>
<S>                                                                          <C>

Executed at:  Irvine, CA
              ----------------------------------------------------------     -----------------------------------

on:  Nov. 4, 2002                                                            By  /s/  David Krietzberg
     -------------------------------------------------------------------     -----------------------------------
Address:  10 Faraday                                                         By  David Krietzberg
        ----------------------------------------------------------------     -----------------------------------
                                                                             "Sublessor" (Corporate Seal)

Executed at:  Bothell, WA
             -----------------------------------------------------------     -----------------------------------

on:  November 1, 2002                                                        By  /s/  Kurtis L. Adams
     -------------------------------------------------------------------     -----------------------------------
Address:  1191 North Creek Parkway                                           By   Kurtis L. Adams
        ----------------------------------------------------------------     -----------------------------------
                 Bothell, WA  98011                                          "Sublessee" (Corporate Seal)

Executed at:
             -----------------------------------------------------------     -----------------------------------

on:                                                                          By
     -------------------------------------------------------------------     -----------------------------------
Address:                                                                     By
       ----------------------------------------------------------------      -----------------------------------
                                                                             "Master Lessor" (Corporate Seal)
</TABLE>
NOTE: THESE FORMS ARE OFTEN MODIFIED TO MEET CHANGING REQUIREMENTS OF LAW AND
NEEDS OF THE INDUSTRY. ALWAYS WRITE OR CALL TO MAKE SURE YOU ARE UTILIZING THE
MOST CURRENT FORM: AMERICAN INDUSTRIAL REAL ESTATE ASSOCIATION, 700 SO. FLOWER
ST., SUITE 600, LOS ANGELES, CA 90017, (213)687-8777.

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      ADDENDUM FOR SUBLEASE BY AND BETWEEN INTER-TEL TECHNOLOGIES, INC., AS
                 SUBLESSOR AND VIXEL CORPORATION, AS SUBLESSEE,
                                OCTOBER 31, 2002

                                     Page 1

13.   "AS-IS" CONDITION. Sublessee shall take the Premises in an "as-is",
      present condition, except for Sublessor's cleaning of the ceiling tiles
      and air filters visual to the eye on a onetime basis, by no later than the
      lease commencement date. Any and all tenant improvements to the Premises
      are to be performed solely by the Sublessee, subject to the prior written
      consent by the Sublessor and Master Lessor. Sublessee shall take full
      responsibility for determining the suitability of the Premises, including
      but not limited to its compliance with any and all applicable building
      codes including the American with Disabilities Act ("ADA"). If the
      Premises must be altered in order to comply with ADA at any time during
      the term of the sublease, either Sublessor or Sublessee has the option to
      terminate the sublease rather than make the changes if the changes include
      the installation of an elevator or other major structural modifications.

14.   BASE RENT. Base rent as referenced in section 4.1 of the Sublease shall be
      full service gross, flat for the term, except that Sublessee shall
      separately meter and be responsible for any and all electricity costs in
      connection with the air conditioning unit used to cool the server room to
      be installed by the Sublessee, and the Sublessee shall be responsible for
      paying its prorata share of operating expense increases over the 2003 base
      year.

15.   OPERATING EXPENSE INCREASE. Sublessee shall pay to Sublessor during the
      term hereof, in addition to the Base Rent, Sublessee's Share of the amount
      by which all Operating Expenses for each Comparison Year exceeds the
      amount of all Operating Expenses for the Base Year, such excess being
      hereinafter referred to as the "Operating Expense increase", in accordance
      with the following provisions.

     (a) "BASE YEAR" is 2003.

     (b) "COMPARISON YEAR" is defined as each calendar year during the term of
     this Lease subsequent to the Base Year; provided, however, Sublessee shall
     have no obligation to pay a share of the Operating Expense Increase
     applicable to the first 12 months of the Lease Term. Sublessee's Share of
     the Operating Expense Increase for the first and last Comparison Years of
     the Lease Term shall be prorated according to that portion of such
     Comparison Year as to which Sublessee is responsible for a share of such
     increase.

     (c) "OPERATING EXPENSES" include all costs incurred by Sublessor
     relating to the operation of the Building calculated as if the Building was
     at least 95% `occupied, including, but not limited to, the following:

            (i) The operation, repair, and maintenance in neat, clean, safe,
      good order and condition, but not the replacement (see subparagraph (g)),
      of the following:

               (aa) The Common Areas, including their surfaces, coverings,
     carpets, drapes and window coverings, and including parking areas, loading
     and unloading areas, trash areas, roadways, sidewalks, walkways, stairways,
     parkways, driveways, landscaping areas, striping, bumpers, irrigation
     systems, Common Area lighting facilities, building exteriors and roofs,
     fences and gates.

               (bb) All heating, air conditioning, plumbing, electrical systems,
     life safety equipment, communication systems and other equipment used in
     common by, or for the benefit of Sublessee or occupants of the Building,
     including fire detection systems including sprinkler system maintenance and
     repair.
<PAGE>
      ADDENDUM FOR SUBLEASE BY AND BETWEEN INTER-TEL TECHNOLOGIES, INC., AS
                 SUBLESSOR AND VIXEL CORPORATION, AS SUBLESSEE,
                                OCTOBER 31, 2002

                                     Page 2

            (ii) Trash disposal, janitorial and security services, pest control
      services, and the costs of any environmental inspections;

            (iii) Any other service to be provided by Sublessor that is
      elsewhere in the Master Lease stated to be an `Operating Expense";

            (iv) The cost of premiums for the insurance policies maintained by
      Sublessor pursuant to applicable paragraphs in the Master Lease.

            (v) The amount of the Real Property Taxes payable by Sublessor
      pursuant to applicable paragraphs in the Master Lease;

            (vi) The costs of water, sewer, gas, electricity, and other publicly
      mandated services not separately metered;

            (vii) Labor, salaries, and applicable fringe benefits and costs,
      materials, supplies and tools, used in maintaining and/or cleaning the
      Building and accounting and management fees attributable to the operation
      of the Building.

            (viii) The cost of any Capital Expenditure to the Building or the
      Building covered under the applicable paragraphs in the Master Lease;

     (d) Any item of Operating Expense that is specifically attributable to the
     Premises, the Building or to any other building in the Building or to the
     operation, repair and maintenance thereof, shall be allocated entirely to
     such Premises, Building or other building,

      (e) Sublessee's Share of Operating Expense Increase shall be payable by
      Sublessee within 30 days after a reasonably detailed statement of actual
      expenses presented to Sublessee by Sublessor. At Sublessor's option,
      however, an amount may be estimated by Sublessor from time to time in
      advance of Sublessee's Share of Operating Expenses Increase for any
      Comparison Year, and the same shall be payable monthly during each
      Comparison Year of the Lease term, on the same day as the Base Rent is due
      hereunder. In the even that Sublessee pay Sublessor's estimate of
      Sublessee's Share of Operating Expense Increase as aforesaid, Sublessor
      shall deliver to Sublessee within 60 days after the expiration of each
      Comparison year a reasonably detailed statement showing Sublessee's Share
      of the actual Operating Expense Increase incurred during such year. If
      Sublessee's payments under this paragraph (e) during said Comparison Year
      exceed Sublessee's Share as indicated on said statement, Sublessee
      payments shall be entitled to credit the amount of such overpayment
      against Sublessee's Share as indicated on said statement, Sublessee shall
      pay to Sublessor the amount of the deficiency within thirty (30) days
      after delivery by Sublessor to Sublessee of said statement. Sublessor and
      Sublessee shall forthwith adjust between them by cash payment any balance
      determined to exist with respect to that portion of the last Comparison
      Year for which Sublessee is responsible as to Operating Expense Increase,
      notwithstanding that the Lease term may have terminated before the end of
      such Comparison Year.

      (f) Operating Expenses shall not include the costs of replacement for
      equipment or capital components such as the roof, foundations, exterior
      walls or a Common Area capital improvement, such as the parking lot
      paving, elevators, fences that have a useful life for accounting purposes
      of 5 years or more unless it is the type describe in paragraph 4.2(c)
      (viii), in which case their cost shall be included as above provided.

      Operating Expenses shall not include any expenses paid by any tenant
      directly to third parties, or as to which Sublessor is otherwise
      reimbursed by any thing party, other tenant, or by insurance proceeds.
<PAGE>

      ADDENDUM FOR SUBLEASE BY AND BETWEEN INTER-TEL TECHNOLOGIES, INC., AS
                 SUBLESSOR AND VIXEL CORPORATION, AS SUBLESSEE,
                                OCTOBER 31, 2002

                                     Page 3

16.   UTILITIES AND SERVICES.

16.1 SERVICES PROVIDED BY SUBLESSOR. Sublessor shall provide heating,
ventilation, air conditioning, reasonable amounts of electricity for normal
lighting and office machines, water for reasonable and normal drinking and
lavatory use in connection with an office, and the provision of replacement
light bulbs and/or fluorescent tubes and ballasts, not the labor to replace, the
standard overhead fixtures. Sublessor shall also provide janitorial services to
the Premises and Common Areas 3 limes per week, excluding Building Holidays as
defined in the Master Lease. Sublessor shall not, however, be required to
provide janitorial services to the shower included within the Premises, and any
such additional janitorial service shall be at the sole cost and responsibility
of Sublessee.

16.2 SERVICES EXCLUSIVE TO SUBLESSEE. Sublessee shall be responsible for the
payment of any and all telephone service to the Premises including any cost of
installation of said service or equipment.

16.3 HOURS OF SERVICE. Sublessee shall have access to its Premises seven (7)
days per week, twenty-four (24) hours per day.

16.4 EXCESS USAGE BY SUBLESSEE. Sublessee shall not make connection to the
utilities except by or through existing outlets and shall not install or use
machinery or equipment in or about the Premises that uses excess water, lighting
or power, or suffer or permit any act that causes extra burden upon the
utilities and services, including but not limited to security and trash
services, over standard office usage for the Building. Sublessor shall require
Sublessee to reimburse Sublessor for any excess expenses or costs that may arise
out of a breach of this subparagraph by Sublessee. Sublessor may, provided it is
commercially reasonable, install at Sublessee's expense supplemental equipment
and/or separate metering applicable to Sublessee's excess usage or loading.

17. SERVER ROOM.

17.1 SERVER ROOM MODIFICATIONS. Sublessee shall be required to pay for all of
the costs associated with setting up a room within its Premises to contain its
server and other telephony and computer equipment (hereinafter referred to as
"Server Room"), including but not limited to designing and engineering,
permitting, installing equipment and modifying ducting to said Server Room.
Prior to undertaking physical work on the Server Room, Sublessee shall have
secured permits by the appropriate local city government authorities, and shall
give Sublessor advance written notice of its plans. Any work on the Server Room
shall be completed in a substantial, good and workmanlike manner to Sublessor's
and Master Lessor's satisfaction.

In the event Sublessee shall not make such Server Room modifications in the
manner required herein, or shall fail to make modifications deemed necessary by
the Master Lessor, Sublessor or local municipal building authority, Sublessee
shall be responsible for any and all sums expended by Master Lessor or Sublessor
to bring the improvements into compliance. In addition, the Sublessee shall be
responsible for returning the Server Room to its original condition at the time
the Sublessee vacates the Premises. In the event Sublessee fails to bring the
server room back to its original condition,
<PAGE>
      ADDENDUM FOR SUBLEASE BY AND BETWEEN INTER-TEL TECHNOLOGIES, INC., AS
                 SUBLESSOR AND VIXEL CORPORATION, AS SUBLESSEE,
                                OCTOBER 31, 2002

                                     Page 4

Sublessee shall be responsible for any and all sums expended by Master Lessor or
Sublessor to return the server room to its original condition.

18. INTERRUPTIONS. There shall be no abatement of rent and Sublessor shall not
be liable in any respect whatsoever for the inadequacy, stoppage, interruption
or discontinuance of any utility or service due to riot, strike, labor dispute,
breakdown, accident, repair or other cause beyond Sublessor's reasonable control
or in cooperation with governmental request or directions.

19. EARLY ACCESS. Notwithstanding any other provision of this Sublease,
Sublessor hereby grants Sublessee, (including Sublessee's employees, agents and
contractors) a non-exclusive, revocable license to enter into and upon Premises
from the date of execution of this Sublease and Master Lessor's consent to and
including the Commencement Date ("License") in order that Sublessee may: (1)
inspect, test and analyze the Premises and any Building system or components,
(2) prepare Sublessee's plans to shampoo the carpet, paint the Premises, build
the Server Room, install any Sublessee-specific security system, and (3) perform
any of the work as detailed above. Notwithstanding the above, the Commencement
Date shall not be extended or postponed due to any delay experienced by the
Sublessee to prepare or complete the work described above.

20. PARKING.

20.1 SUBLESSOR'S EXCLUSIVE PARKING. Sublessor shall have the right to use on an
exclusive basis the first four (4) spaces closest to the front door on the left
side of the parking lot (north side).

20.2 EXCESS PARKING. Pursuant to Provision 1.2 of the master lease, Sublessee
shall rights to use up to 29 parking spaces of the 58 total parking spaces
attributable to the Building. In the event that parking spaces over and above
the 29 spaces are not in use by the Sublessor, Sublessee shall have rights to
use on an as as-available, first come, first serve daily basis only; no
additional rights to park above the 29 parking space limit shall be assumed or
implied.

21. SIGNAGE. Sublessee shall have rights to install a monument sign at the
entrance to the Building's parking lot on the right side opposite the
Sublessor's monument sign, and on the front entrance to the Building, provided
that the following circumstances are satisfied: 1) Both signs shall be equal to
or smaller in scale and size than the equivalent signs of the Sublessor, 2) Both
signs shall be designed, permitted, made, installed and removed at the
expiration of the Sublease, at the sole cost and expense of the Sublessee, and
3) Both signs shall be subject to the prior written approval of the City of
Irvine and/or any other government authority over signage, the Sublessor and the
Master Lessor, 4) Installations and removals of both signs shall be completed in
a substantial, good and workmanlike manner to the Sublessor's and Master
Lessor's satisfaction.
<PAGE>
      ADDENDUM FOR SUBLEASE BY AND BETWEEN INTER-TEL TECHNOLOGIES, INC., AS
                 SUBLESSOR AND VIXEL CORPORATION, AS SUBLESSEE,
                                OCTOBER 31, 2002

                                     Page 5

22. COUNTERPART. This sublease shall not be effective until signed by both
parties and Master Lessor consents in writing to the sublease. The sublease and
consent documents may be executed in counterpart and a fax signature shall have
the same force and effect as an original.

<TABLE>
<S>                                                           <C>

Executed at:  Irvine, CA
              ---------------------------------------         ------------------------------------------------

On:  Nov. 4, 2002                                             By  /s/  David Krietzberg
     ------------------------------------------------             --------------------------------------------
Address:  10 Faraday                                          By  David Krietzberg
          -------------------------------------------             --------------------------------------------
                                                              Sublessor    VP Finance & CFO

Executed at:  Bothell, WA
              ---------------------------------------         ------------------------------------------------

On:  November 1, 2002                                         By  /s/  Kurtis L. Adams
     ------------------------------------------------             --------------------------------------------
Address:  1191 North Creek Parkway So.                        By  Kurtis L. Adams, CFO
          -------------------------------------------             --------------------------------------------
                 Bothell, WA  98011                           Sublessee

Executed at:
            -----------------------------------------         ------------------------------------------------

On:                                                           By
   --------------------------------------------------           ----------------------------------------------
Address:                                                      By
        ---------------------------------------------           ----------------------------------------------
                                                              Master Lessor
</TABLE><PAGE>

EXHIBIT 10.1

                           THIRD AMENDED AND RESTATED
                           REVOLVING CREDIT AGREEMENT

                                      AMONG

                         AMERITRADE HOLDING CORPORATION
                                       AND
                     FIRST NATIONAL BANK OF OMAHA, AS AGENT
                                       AND
                         REVOLVING LENDERS PARTY HERETO

                                DECEMBER 15, 2003

<PAGE>

              THIRD AMENDED AND RESTATED REVOLVING CREDIT AGREEMENT

         This THIRD AMENDED AND RESTATED REVOLVING CREDIT AGREEMENT (the
"Agreement") is entered into as of the 15th day of December, 2003, among
AMERITRADE HOLDING CORPORATION (formerly Arrow Stock Holding Corporation), a
Delaware corporation having its principal place of business at 4211 South 102nd
Street, Omaha, Nebraska 68127 (the "Borrower"), FIRST NATIONAL BANK OF OMAHA, a
national banking association having its principal place of business at 1620
Dodge Street, Omaha, Nebraska 68197-1050 ("Agent" or "FNB-O"), LASALLE BANK
NATIONAL ASSOCIATION, a national banking association having its principal place
of business at 801 Grand Street, Suite 3150, Des Moines, Iowa 50309, M&I
MARSHALL & ILSLEY BANK, a Wisconsin banking association having its principal
place of business at 770 North Water Street, Milwaukee, Wisconsin 53201-2035,
WELLS FARGO BANK, NATIONAL ASSOCIATION, a national banking association having
its principal place of business at 1919 Douglas Street, Omaha, Nebraska 68102
and such lenders as may become Revolving Lenders hereunder after the date
hereof.

                                 I. DEFINITIONS

         For purposes of this Agreement, the following definitions shall apply:

AA Rated:         Taxable, tax-exempt or tax-advantaged securities that have an
                  issue or issuer credit rating from a nationally recognized
                  statistical rating organization of at least AA, Aa2 or the
                  equivalent; provided, however, that for those securities for
                  which long-term ratings are not available, "AA Rated" means
                  those taxable, tax-exempt or tax-advantaged securities that
                  have an issue or issuer credit rating from a nationally
                  recognized statistical rating organization of at least A1,
                  SP1/MIG 1 or P1.

Acquisition:      Any acquisition, by purchase or otherwise, of all or
                  substantially all of the assets of, or stock or other evidence
                  of equity ownership of, any Person or any division or line of
                  business of any Person by the Borrower or any of its
                  Subsidiaries.

Advance:          Any advance of funds to the Borrower by the Revolving Lenders
                  or any of them under the revolving credit facility provided in
                  this Agreement.

Agreement:        This Third Amended and Restated Revolving Credit Agreement,
                  dated as of December 15, 2003, among the Borrower and the
                  Revolving Lenders, as amended or restated from time to time.

Ameritrade,
Inc.:             Ameritrade, Inc., formerly known as Advanced Clearing, Inc., a
                  Nebraska corporation and Subsidiary of Ameritrade Online.

Ameritrade

                                     - 2 -

<PAGE>

Online:           Ameritrade Online Holdings Corp., formerly known as Ameritrade
                  Holding Corporation, and a wholly-owned Subsidiary of the
                  Borrower.

Applicable
Margin:           For purposes of determining the Revolving Credit Rate, the
                  margin is (i) zero for the National Prime Rate, or (ii) plus
                  2.00% for LIBOR.

Borrower:         Ameritrade Holding Corporation, formerly known as Arrow Stock
                  Holding Corporation.

Broker-
Dealer
Liquidity
Agreements:       Liquidity agreements entered into by one or more Broker-Dealer
                  Subsidiaries, including the $310,000,000 unsecured promissory
                  note entered into by Ameritrade, Inc. with The Bank of New
                  York and the $100,000,000 secured liquidity agreement entered
                  into by Ameritrade, Inc. with The Bank of New York.

Broker-
Dealer
Subsidiary:       Any Subsidiary of the Borrower, direct or indirect, that is a
                  registered broker-dealer pursuant to the Exchange Act.

Business
Day:              Any day other than a Saturday, Sunday or a legal holiday on
                  which banks in the State of Nebraska are not open for
                  business.

Cash
Equivalents:      Cash on deposit plus those Permitted Investments described in
                  clauses (a), (b), (c) (so long as such commercial paper has a
                  maturity of ninety (90) days or less), (d) and (e) of the
                  definition of "Permitted Investments" in this Article I.

Change of
Control:          (a) At any time when any of the equity securities of the
                  Borrower shall be registered under Section 12 of the Exchange
                  Act (i) any person, entity or "group" (within the meaning of
                  Section 13(d)(3) of the Exchange Act) (other than any person
                  which is a management employee, or any such "group" which
                  consists entirely of management employees, of the Borrower or
                  any "group" formed in connection with that certain
                  Stockholders Agreement, by and among J. Joe Ricketts, members
                  of his family and trusts held for their benefit, and
                  investment funds affiliated with Bain Capital, Silver Lake
                  Partners and TA Associates, and entered into in connection
                  with the 2002 Datek merger) being or becoming the beneficial
                  owner, directly or indirectly, of voting stock of the Borrower
                  in an amount sufficient to elect a majority of the members of
                  the Borrower's board of directors, or (ii) a majority of the
                  members of the Borrower's board of directors (the "Board")
                  consisting of persons other than Continuing Directors (as
                  hereinafter defined); and (b) at any other time, the majority
                  of the voting stock of the Borrower being owned beneficially,
                  directly or indirectly, by any person,

                                     - 3 -

<PAGE>

                  entity or group other than employees of the Borrower or its
                  Subsidiaries. As used herein, the term "Continuing Director"
                  means any member of the Board on the date of this Agreement,
                  and any other member of the Board who shall be recommended or
                  elected to succeed a Continuing Director by a majority of
                  Continuing Directors who are the members of the Board.

Collateral:       All personal property of the Borrower and each Guarantor
                  described in the Security Agreements and the Pledge
                  Agreements, whether now owned or hereafter acquired,
                  including, without limitation:

                                    (a) all of the Borrower's stock in any
                           present or future Material Subsidiary, including
                           without limitation, Ameritrade Online and Datek;
                           provided, however, that the Collateral shall not
                           include any investment property or equity securities
                           issued by any Subsidiary of the Borrower that is
                           organized under the laws of any jurisdiction other
                           than the United States of America (or any state
                           thereof) in excess of sixty-five percent (65%) of the
                           total voting power of all equity securities of such
                           Subsidiary;

                                    (b) all of the Borrower's accounts, accounts
                           receivable, chattel paper, documents, instruments and
                           other securities, goods, inventory, letter of credit
                           rights, equipment, furniture and fixtures, general
                           intangibles, contract rights, computer, data
                           processing, hardware and software licenses, books and
                           records;

                                    (c) all of Ameritrade Online's stock in any
                           present or future Material Subsidiary, including
                           without limitation, the following: Ameritrade, Inc.;
                           J.P. Securities, Inc.; Accutrade, Inc.; Financial
                           Passport, Inc.; TradeCast, Inc.; Nebraska Hudson
                           Company, Inc.; Ameritrade Institutional Services,
                           Inc.; Freetrade.com, Inc.; AmeriVest Brokers, Inc.;
                           OnMoney Financial Services Corporation; Ten Bagger
                           Incorporated; Ameritrade Canada, Inc.; Ameritrade
                           International Company, Inc.; Ameritrade Services
                           Company; Ameritrade IP Company; and Ameritrade
                           Development Company; provided, however, that the
                           Collateral shall not include any investment property
                           or equity securities issued by any Subsidiary of
                           Ameritrade Online that is organized under the laws of
                           any jurisdiction other than the United States of
                           America (or any state thereof) in excess of
                           sixty-five percent (65%) of the total voting power of
                           all equity securities of such Subsidiary;

                                    (d) all of Ameritrade Online's accounts,
                           accounts receivable, chattel paper, documents,
                           instruments and other securities (excluding NITE
                           Stock), goods, inventory, letter of credit rights,
                           equipment, furniture and fixtures, general
                           intangibles, contract rights, computer, data
                           processing, hardware and software licenses, books and
                           records;

                                    (e) all of Datek's stock in Ameritrade, Inc.
                           and in any present or future Material Subsidiary,
                           including without limitation, the following:

                                     - 4 -

<PAGE>

                           Datek Online Financial Services LLC; iClearing;
                           BigThink Corp.; Datek Online Management Corp.;
                           Watcher Technologies LLC; and iCapital Markets LLC;
                           provided, however, that the Collateral shall not
                           include any investment property or equity securities
                           issued by any Subsidiary of Datek that is organized
                           under the laws of any jurisdiction other than the
                           United States of America (or any state thereof) in
                           excess of sixty-five percent (65%) of the total
                           voting power of all equity securities of such
                           Subsidiary; provided further, that the Collateral
                           shall not include any investment property or equity
                           securities issued by Datek Canada Financial Services,
                           Inc.;

                                    (f) all of Datek's accounts, accounts
                           receivable, chattel paper, documents, instruments and
                           other securities, goods, inventory, letter of credit
                           rights, equipment, furniture and fixtures, general
                           intangibles, contract rights, computer, data
                           processing, hardware and software licenses, books and
                           records and equitable interests in limited liability
                           companies, including, without limitation, Datek
                           Online Financial Services LLC, iClearing, Watcher
                           Technologies LLC and iCapital Markets LLC; and

                                    (g) all proceeds and products of the
                           foregoing.

Commitment:       As to each Revolving Lender, such Revolving Lender's pro rata
                  percentage or maximum dollar amount of the commitments set
                  forth in Section 2.1 of this Agreement.

Datek:            Datek Online Holdings Corp., a wholly-owned Subsidiary of the
                  Borrower.

Default Rate:     The Revolving Credit Rate as defined herein plus 3.0%.

Derivatives:      (a) Any rate swap transaction, basis swap, credit derivative
                  transaction, forward rate transaction, equity or equity index
                  swap or option, bond or bond price or bond index swap or
                  option or forward bond or forward bond price or forward bond
                  index transaction, interest rate option, forward foreign
                  exchange transaction, cap transaction, floor transaction,
                  collar transaction, currency swap transaction, cross-currency
                  rate swap transaction, currency option, spot contract or any
                  other similar transaction or any combination of the foregoing
                  (including any option to enter into any of the foregoing),
                  whether or not any such transaction is governed by or subject
                  to any master agreement and (b) any and all transactions of
                  any kind, and the related confirmations, which are subject to
                  the terms and conditions of, or governed by, any form of
                  master agreement published by the International Swaps and
                  Derivatives Association, Inc., any International Foreign
                  Exchange Master Agreement or any other master agreement to
                  which the Borrower or any of its Subsidiaries is a party,
                  including any Derivative in connection with deferred
                  compensation for one or more key employees of the Borrower or
                  its Subsidiaries.

Derivative

                                     - 5 -

<PAGE>

Indebtedness:     With respect to any Derivative, the sum (without duplication
                  and determined after taking into account the effect of any
                  netting agreement relating to such Derivative) of all required
                  cash termination amounts thereunder payable by the Borrower or
                  any Subsidiary, minus cash on deposit securing such
                  Indebtedness.

Distributable
Net Capital:      Excess Regulatory Net Capital which is available to
                  broker-dealer Subsidiaries of the Borrower to be distributed
                  to the Borrower or a Guarantor without prior notice or consent
                  of the applicable regulators.

ERISA:            The Employee Retirement Income Security Act of 1974, as
                  amended.

Event of
Default:          Any of the events set forth in Section 6.1 of this Agreement.

Exchange
Act:              The Securities Exchange Act of 1934, as amended from time to
                  time.

Excess
Regulatory
Net Capital:      The aggregate amount of the actual Regulatory Net Capital for
                  each Broker-Dealer Subsidiary, minus Minimum Regulatory Net
                  Capital.

Existing Credit
Facility:         The Second Amended and Restated Revolving Credit Agreement
                  dated as of December 16, 2002, by and among FNB-O, the
                  Borrower, LaSalle Bank National Association and M&I Marshall &
                  Ilsley Bank.

Fiscal
Month:            A month that ends as of the last Friday of a calendar month,
                  or, as to December, as of December 31st.

FNB-O:            First National Bank of Omaha, a national banking association
                  having its principal place of business at 1620 Dodge Street,
                  Omaha, Nebraska 68197-1050, and its successors and assigns.

GAAP:             Generally accepted accounting principles as in effect from
                  time to time in the United States of America.

Guarantor:        Either Ameritrade Online or Datek, and "Guarantors" means both
                  of them.

Guarantor
Documents:

                  (a)      The Amended and Restated Guaranty Agreement, dated as
                           of the date hereof, between Ameritrade Online and
                           Agent;

                                     - 6 -

<PAGE>

                  (b)      The Second Amended and Restated Guaranty Agreement,
                           dated as of the date hereof, between Datek and Agent;

                  (c)      The Third Amended and Restated Stock Pledge
                           Agreement, dated as of the date hereof, between
                           Ameritrade Online and Agent;

                  (d)      The Second Amended and Restated Stock Pledge
                           Agreement, dated as of the date hereof, between Datek
                           and Agent;

                  (e)      The Third Amended and Restated Security Agreement,
                           dated as of the date hereof, between Ameritrade
                           Online and Agent; and

                  (f)      The Second Amended and Restated Security Agreement,
                           dated as of the date hereof, between Datek and Agent.

iClearing:        iClearing LLC, a Delaware limited liability company and a
                  Subsidiary of Datek.

Indebtedness:     All loans and other obligations of the Borrower and the
                  Guarantors for borrowed money, without duplication,
                  (including, without limitation, the indebtedness due to the
                  Revolving Lenders) and all Derivative Indebtedness; but
                  excluding the following: (i) capital leases incurred in the
                  ordinary course of business; (ii) net payables to customers
                  and broker-dealers in the ordinary course of business; (iii)
                  borrowings collateralized by client assets in the ordinary
                  course of business; (iv) Subordinated Debt; and (v) amounts
                  under Broker-Dealer Liquidity Agreements; provided that the
                  aggregate outstandings plus undrawn commitment amounts of all
                  such liquidity agreements shall not exceed $510,000,000 at any
                  one time.

Investments:      (i) Any direct or indirect purchase or other acquisition by
                  the Borrower or any of its Subsidiaries of, or of a beneficial
                  interest in, any securities of any other Person (including any
                  Subsidiary of the Borrower), or (ii) any direct or indirect
                  loan, advance (other than advances to employees for moving,
                  entertainment and travel expenses, drawing accounts and
                  similar expenditures in the ordinary course of business) or
                  capital contribution by the Borrower or any of its
                  Subsidiaries to any other Person, but excluding Acquisitions.

LaSalle
Bank National
Association:      LaSalle Bank National Association, a national banking
                  association having its principal place of business at 801
                  Grand Street, Suite 3150, Des Moines, Iowa 50309.

Letter(s) of
Credit:           Letter(s) of Credit issued under the Letter of Credit
                  Facility, the Letter of Credit Amount of which shall not
                  exceed $15,000,000.00 at any time.

Letter of
Credit

                                     - 7 -

<PAGE>

Amount:           The original face amount of the Letters of Credit, minus the
                  amount of any draws thereunder which have been reimbursed to
                  the Agent for the benefit of the Revolving Lenders.

Letter of
Credit
Facility:         The letter of credit facility provided for in Section 2.7 of
                  the Agreement.

Letter of
Credit Fees:      The letter of credit fees specified in Section 2.9 of this
                  Agreement.

Leverage
Ratio:            Minimum Liquid Assets divided by Permitted Indebtedness;
                  provided, however, for this purpose Non-Broker-Dealer Cash
                  shall not be less than thirty-three percent (33%) of Minimum
                  Liquid Assets; and, provided further, that such
                  Non-Broker-Dealer Cash shall not be subject to any Lien other
                  than Liens in favor of the Agent on behalf of the Revolving
                  Lenders.

LIBOR
Rate:             The floating per annum interest rate published from time to
                  time as the "one month LIBOR rate" in the "Money Rates"
                  Section of the Midwest Edition of the Wall Street Journal on
                  the first Business Day of each month, or if no such rate is
                  published on such date, on the last preceding date on when
                  such rate was published.

Material
Subsidiary:       Any Subsidiary with total assets equal to or greater than
                  $2,000,000.00.

M&I
Marshall &
Ilsley Bank:      M&I Marshall & Ilsley Bank, a Wisconsin banking association
                  having its principal place of business at 770 North Water
                  Street, Milwaukee, Wisconsin 53201-2035.

Minimum
Liquid
Assets:           The sum of all Non-Broker-Dealer Cash plus Distributable Net
                  Capital.

Minimum
Regulatory
Net Capital:      The amount of net capital required for any Subsidiary
                  that is a broker-dealer under Section 15(c)(3) of the Exchange
                  Act and the regulations promulgated thereunder; provided,
                  however, in no event shall Minimum Regulatory Net Capital be
                  less than the greater of (a) the lesser of (x) $250,000 and
                  (y) the minimum fixed dollar amount applicable to such
                  Subsidiary or (b) two percent (2%) of aggregate debit items.

                                     - 8 -

<PAGE>

Money
Market
Funds:            At any time, money market funds whose rating from Standard and
                  Poor's Rating Services Group ("S&P") is AAAm or AAm or the
                  equivalent thereof or whose Moody's Investor Services
                  ("Moody's") rating is Aaa or Aa or the equivalent thereof;
                  provided, however, that any tax-exempt money market funds
                  shall have minimum assets of at least $2,000,000,000 and any
                  taxable money market funds shall have minimum assets of at
                  least $4,000,000,000.

National
Prime Rate:       The floating per annum interest rate published from time
                  to time as the "Prime Rate" (the base rate on corporate loans
                  posted by at least 75% of the nation's 30 largest banks) in
                  the "Money Rates" Section of the Midwest Edition of the Wall
                  Street Journal on the first Business Day of the month, or if
                  no such rate is published on such date, on the last preceding
                  date when such rate was published.

NITE Stock:       The common stock, or any securities exchanged for the
                  common stock, of Knight Trading Group, Inc. (formerly
                  Knight/Trimark Group, Inc.), held by the Borrower or any of
                  its Subsidiaries.

Non-Broker-
Dealer Cash:      Cash on hand or on deposit, plus Cash Equivalents, of the
                  Borrower or any Subsidiary that is not a broker-dealer.

Notes:            The revolving credit notes, substantially in the form of
                  Exhibit A attached to this Agreement, which notes replace the
                  revolving credit notes issued and outstanding under the
                  Existing Credit Facility, and such additional similar notes as
                  may be issued to certain additional Revolving Lenders, and all
                  extensions, renewals, and substitutions of or for the
                  foregoing.

Operative
Documents:        This Agreement, the Notes, the Pledge Agreements, the Security
                  Agreements, the Guarantor Documents, the financing statements
                  regarding the Collateral and the documents and certificates
                  delivered pursuant to Section 5.1.

Permitted
Indebtedness:     Senior Debt plus Derivative Indebtedness not to exceed
                  $10,000,000 in the aggregate.

Permitted
Investments:      Any one or more of the following:

                                    (a) certificates of deposit fully covered by
                           Federal Deposit Insurance and maintained at a bank
                           having capital and surplus of not less than
                           $50,000,000;

                                     - 9 -

<PAGE>

                                    (b) short-term obligations of, or
                           obligations fully guaranteed by, the United States of
                           America or any agencies thereof;

                                    (c) commercial paper rated at least A-1 by
                           Standard and Poor's Ratings Service or P-1 by Moody's
                           Investors Service, Inc.;

                                    (d) demand deposit accounts maintained in
                           the ordinary course of the business at a bank having
                           capital and surplus of not less than $50,000,000;

                                    (e) Money Market Funds;

                                    (f) AA Rated or equivalent (or better)
                           variable rate preferred stock or debt;

                                    (g) AA Rated or equivalent (or better)
                           municipal notes and bonds; and

                                    (h) overnight repurchase agreements with
                           respect to, and which are fully secured by a security
                           interest in, direct obligations issued by or fully
                           guaranteed by the United States of America, and that
                           are entered into with any commercial bank organized
                           under the laws of the United States of America or any
                           state thereof or the District of Columbia that (a) is
                           at least "adequately capitalized" (as defined in the
                           regulations of its primary Federal banking regulator)
                           and (b) has Tier 1 capital (as defined in such
                           regulations) of not less than $100,000,000.

                  provided, however, that the percentage of the Borrower's
                  investment portfolio that can be invested in AA Rated
                  securities is limited to twenty-five percent (25%) of the
                  Borrower's total investment portfolio, valued in accordance
                  with GAAP, so long as the remainder of the Borrower's
                  investment portfolio is invested in at least AAA securities
                  (or the equivalent rating for short-term investments) or in
                  items described in clauses (a) through (e) above; provided
                  further, that the maturities for any Permitted Investments
                  shall not exceed one year; and provided further, that the
                  average maturity of the Borrower's investment portfolio at all
                  times cannot exceed one hundred eighty (180) days. For
                  purposes of this definition, "maturity" includes final
                  maturity, or the put or pre-refunding date when securities are
                  to be liquidated at a predetermined price (usually par value).

Permitted
Liens:            (i) Liens existing on the date of this Agreement as shown on
                  Exhibit D; (ii) Liens for taxes, assessments, governmental
                  charges or claims which are not yet delinquent or which are
                  being contested in good faith by appropriate proceedings
                  promptly instituted and diligently conducted and if a reserve
                  or other appropriate provision, if any, as shall be required
                  in conformity with GAAP shall have been made therefor; (iii)
                  statutory Liens of landlords and carriers, warehousemen,
                  mechanics, suppliers, materialmen, repairmen or other like
                  Liens arising in the

                                     - 10 -

<PAGE>

                  ordinary course of business and with respect to amounts not
                  yet delinquent or being contested in good faith by appropriate
                  proceedings, and if a reserve or other appropriate provision,
                  if any, as shall be required in conformity with GAAP shall
                  have been made therefor; (iv) Liens (other than any Lien
                  imposed by the Employee Retirement Income Security Act of
                  1974, as amended) incurred or deposits made in the ordinary
                  course of business in connection with workers' compensation,
                  unemployment insurance and other types of social security; (v)
                  Liens incurred or deposits made to secure the performance of
                  tenders, bids, leases, statutory obligations, surety and
                  appeal bonds, government contracts, performance and
                  return-of-money bonds and other obligations of a like nature
                  incurred in the ordinary course of business (exclusive of
                  obligations for the payment of borrowed money); (vi)
                  easements, rights-of-way, restrictions, minor defects or
                  irregularities in title and other similar charges or
                  encumbrances not interfering in any material respect with the
                  business of the Borrower or any of its Subsidiaries incurred
                  in the ordinary course of business; (vii) judgment and
                  attachment Liens not giving rise to an Event of Default;
                  (viii) leases or subleases granted to others not interfering
                  in any material respect with the business of the Borrower or
                  any of its Subsidiaries; (ix) Liens securing Permitted
                  Indebtedness; (x) Liens encumbering deposits made to secure
                  obligations arising from statutory, regulatory, contractual or
                  warranty requirements of the Borrower; (xi) any interest or
                  title of a lessor in the property subject to any capital lease
                  obligation or operating lease entered into by the Borrower in
                  the ordinary course of business provided that the incurrence
                  of any related indebtedness is not prohibited by this
                  Agreement; (xii) Liens of banks in funds on deposit with such
                  banks; (xiii) Liens in favor of customs and revenue
                  authorities arising as a matter of law to secure payment of
                  customs duties in connection with the importation of goods;
                  (xiv) customary Liens securing Derivative Indebtedness; and
                  (xv) extensions, renewals or regranting of any Liens referred
                  to in clauses (i) through (xiv) above.

Person:           Natural persons, corporations, limited partnerships, general
                  partnerships, limited liability companies, limited liability
                  partnerships, joint stock companies, joint ventures,
                  associations, companies, trusts, banks, trust companies, land
                  trusts, business trusts or other organizations, whether or not
                  legal entities, and governments (whether federal, state or
                  local, domestic or foreign, and including political
                  subdivisions thereof) and agencies or other administrative or
                  regulatory bodies thereof.

Plan:             All pension, savings, retirement, health, insurance, severance
                  and other employee benefit or fringe benefit plans, programs,
                  arrangements or agreements (including "employee benefit plans"
                  as defined in Section 3(3) of ERISA) maintained or sponsored
                  by the Borrower or any Subsidiary or with respect to which the
                  Borrower or any Subsidiary has any responsibility, obligation
                  or liability, contingent or otherwise.

Pledge
Agreements:       Collectively, the following Stock Pledge Agreements: (i) the
                  Third Amended and Restated Stock Pledge Agreement, dated as of
                  the date hereof, between

                                     - 11 -

<PAGE>

                  Ameritrade Online and FNB-O, as agent for the Revolving
                  Lenders, as amended or restated from time to time; (ii) the
                  Second Amended and Restated Stock Pledge Agreement, dated as
                  of the date hereof, between the Borrower and FNB-O, as agent
                  for the Revolving Lenders, as amended or restated from time to
                  time; and (iii) the Second Amended and Restated Stock Pledge
                  Agreement, dated as of the date hereof, between Datek and
                  FNB-O, as agent for the Revolving Lenders, as amended or
                  restated from time to time.

Potential
Event of
Default:          Any event which with the passage of time or the giving of
                  notice or both would, if it continues uncured, constitute an
                  Event of Default.

Principal
Loan
Amount:           The aggregate principal amount of all unpaid Advances made
                  under the Notes outstanding at any time, plus the then current
                  Letter of Credit Amount.

Regulatory
Net Capital:      The amount of net capital held by any Subsidiary that is a
                  broker-dealer under Section 15(c)(3) of the Exchange Act and
                  regulations promulgated thereunder.

Requisite
Revolving
Lenders:          Except where a higher percentage is required pursuant to the
                  express terms of this Agreement, including without limitation
                  Section 7.1, Revolving Lenders owning fifty-one percent (51%)
                  of the Principal Loan Amount outstanding or, if no Principal
                  Loan Amount is outstanding, Revolving Lenders representing
                  fifty-one percent (51%) of the Commitments in effect at such
                  time.

Revolving
Credit Rate:      As defined in Section 2.3 hereof.

Revolving
Lenders:          FNB-O, LaSalle Bank National Association, M&I Marshall &
                  Ilsley Bank, Wells Fargo and such additional Revolving Lenders
                  as may be added as Revolving Lenders under Section 2.1 hereto
                  from time to time in accordance with this Agreement, as such
                  Revolving Lenders may be modified by assignments permitted
                  under Section 7.4 from time to time.

Security
Agreements:       Collectively, the following Security Agreements: (i) the Third
                  Amended and Restated Security Agreement, dated as of the date
                  hereof, between Ameritrade Online and FNB-O, as agent for the
                  Revolving Lenders, as amended or restated from time to time;
                  (ii) the Second Amended and Restated Security Agreement, dated
                  as of the date hereof, between the Borrower and FNB-O, as
                  agent for the Revolving Lenders, as amended or restated from
                  time to time; and (iii) the Second

                                     - 12 -
<PAGE>

                  Amended and Restated Security Agreement, dated as of the date
                  hereof, between Datek and FNB-O, as agent for the Revolving
                  Lenders, as amended or restated from time to time.

Senior
Debt:             All amounts owed to the Revolving Lenders under the Notes and
                  the Operative Documents.

Subordinated
Debt:             Any indebtedness of the Borrower subordinated in right of
                  payment to the obligations of the Borrower to the Revolving
                  Lenders under the Operative Documents, pursuant to
                  documentation containing maturities, amortization schedules,
                  covenants, defaults, remedies, subordination provisions and
                  other material terms in form and substance satisfactory to and
                  approved by written consent of the Agent and the Requisite
                  Revolving Lenders.

Subsidiary:       Any corporation business association, partnership, joint
                  venture, limited liability company or other business entity in
                  which the Borrower, or one or more of its Subsidiaries, or the
                  Borrower and one or more of its Subsidiaries has more than 50%
                  of the equity ownership thereof, or any other entity which,
                  pursuant to GAAP, would be considered a subsidiary of the
                  Borrower or any one or more of its Subsidiaries.

Termination
Date:             December 13, 2004, or such later date as is approved in
                  writing by the Revolving Lenders.

Wells Fargo:      Wells Fargo Bank, National Association, a national banking
                  association having its principal place of business at 1919
                  Douglas Street, Omaha, Nebraska 68102.

All accounting terms not otherwise defined herein shall have the meaning
ordinarily applied under GAAP from time to time in effect.

                             II. REVOLVING FACILITY

         2.1      Revolving Credit. Until December 13, 2004, the Revolving
Lenders severally agree to advance funds for general corporate purposes not to
exceed the amount shown on Appendix I attached hereto, as amended from time to
time (the "Base Revolving Credit Facility"), to the Borrower on a revolving
credit basis.

         Such Advances shall be made on a pro rata basis by the Revolving
Lenders, based on the maximum Advance limits and applicable percentages for each
Revolving Lender as shown on Appendix I attached hereto, as amended from time to
time; provided, however, that each Revolving Lender's Commitment is several and
not joint or joint and several.

         The Borrower shall not be entitled to any Advance hereunder if, after
the making of such Advance, the Principal Loan Amount would exceed the then
current Base Revolving Credit

                                     - 13 -

<PAGE>

Facility after giving effect to the requested Advance. Nor shall the Borrower be
entitled to any further Advances hereunder after the occurrence and during the
continuation of any Event of Default or Potential Event of Default including a
default of the Leverage Ratio covenant under Section 4.19, or if the Borrower's
representations and warranties hereunder are not true and correct in all
material respects as of the time of the requested Advance. Advances shall be
made, on the terms and conditions of this Agreement, upon the Borrower's
request. Requests shall be made by 11:00 a.m. Omaha time on the Business Day
prior to the requested date of the Advance. Requests shall be made by
presentation to FNB-O of a drawing certificate in the form of Exhibit B. The
Borrower's obligation to make payments of principal and interest on the
foregoing revolving credit indebtedness shall be further evidenced by the Notes.
FNB-O shall promptly transmit a copy of each such Advance request to the other
Revolving Lenders. Each Revolving Lender shall remit to FNB-O its Commitment
percentage times the amount of the Advance request, subject to the conditions
specified hereunder. Such remittance shall be transferred to FNB-O on the same
Business Day as to requests received by such Revolving Lender before 12:00 noon
of a Business Day, and as to requests received thereafter, on the next Business
Day.

         2.2      Revolving Credit Fees.

                  (a) The Borrower shall pay to the Revolving Lenders a
         commitment fee equal to 1/4 of 1% (.0025) of the average unused
         facility, payable quarterly in arrears. Such fee shall accrue from the
         first day of each calendar quarter and shall be payable in arrears on
         the tenth (10th) day of the month following the end of each calendar
         quarter; provided, however, that the commitment fee for the calendar
         quarter ending December 31st, 2003 shall accrue from December 15, 2003.
         Such fee shall be paid to the Agent and based on the average unused
         portion of each Revolving Lender's Commitment during the applicable
         quarter. FNB-O shall distribute to each Revolving Lender its pro rata
         share of such fees based on the maximum Advance limits set forth above.

                  (b) The Borrower shall also pay a closing fee to each
         Revolving Lender as set forth in Appendix I attached hereto, such fees
         to be payable at closing.

                  (c) All fees hereunder shall accrue based on a year of 360
         days, and for actual days elapsed.

         2.3      Interest on Revolving Credit. Interest shall accrue on the
Principal Loan Amount outstanding from time to time at a variable rate per annum
(the "Revolving Credit Rate") equal to the lesser of (a) the National Prime Rate
minus the Applicable Margin, or (b) the LIBOR Rate plus the Applicable Margin.
Such rate shall fluctuate monthly based on changes in such rates on the first
day of each month. All interest under the Notes shall accrue based on a year of
360 days, and for actual days elapsed. Interest for any month shall be due no
later than the tenth day of the following month. Notwithstanding anything to the
contrary elsewhere herein, after an Event of Default has occurred and is
continuing, interest shall accrue on the entire outstanding balance of principal
and interest on all indebtedness hereunder at a fluctuating rate per annum equal
to the Default Rate.

         2.4      Payments. On the next succeeding Business Day after the end of
any Fiscal Month the Borrower shall repay the amount, if any, outstanding on the
Notes which in the

                                     - 14 -

<PAGE>

aggregate exceeds the amount of the Base Revolving Credit Facility to be in
place on the next succeeding Business Day following such Fiscal Month and,
within three (3) Business Days after the end of any Fiscal Month in which the
Borrower is not in compliance with the Leverage Ratio covenant in Section 4.19,
such amount necessary to bring the Borrower into compliance with Section 4.19.
The balance of the loan on December 13, 2004, if any, shall be due on the
Termination Date. All obligations of the Borrower under the Notes and under the
other Operative Documents shall be payable in immediately available funds in
lawful money of the United States of America at the principal office of FNB-O in
Omaha, Nebraska or at such other address as may be designated by FNB-O in
writing. In the event that a payment day is not a Business Day, the payment
shall be due on the next succeeding Business Day.

         2.5      Prepayments. The Borrower may at any time prepay the Principal
Loan Amount, in whole or in part, outstanding under the Notes if the Borrower
has given the Agent at least one (1) Business Day's prior written notice of its
intention to make such prepayment. Any such prepayment may be made without
penalty. All such prepayments (other than the prepayments under Section 8.1)
shall be made pro rata among the Revolving Lenders based on their respective pro
rata share of the amounts outstanding on the Notes. No such prepayment shall
reduce the Base Revolving Credit Facility.

         2.6      Security. All obligations of the Borrower hereunder and under
the Operative Documents, including, without limitation, the Borrower's
obligations to make payments of principal and interest on the Notes and to pay
all amounts due in connection with the Letters of Credit, shall be secured by a
first security interest in the Collateral, as more specifically described in the
Security Agreements and the Pledge Agreements, subject to liens permitted
thereunder. All references in the Security Agreements and the Pledge Agreements
to the "Revolving Credit Agreement" shall mean this Agreement as amended from
time to time.

         2.7      Letter of Credit Facility. Subject to and upon the terms and
conditions herein set forth, the Borrower may request and FNB-O on behalf of the
Revolving Lenders shall issue from time to time for the account of the Borrower
or one or more of its Subsidiaries letters of credit (the "Letters of Credit");
provided, however, FNB-O shall have no obligation to issue any such Letter of
Credit unless at such time the Borrower meets all the conditions for an Advance
under the Base Revolving Credit Facility and, after such issuance, the aggregate
Letter of Credit Amount outstanding will not exceed $15,000,000 and the
Principal Loan Amount will not exceed the then available Base Revolving Credit
Facility and no Potential Event of Default or Event of Default shall have
occurred or be continuing, including a default of the Leverage Ratio covenant
under Section 4.19, all as more specifically set forth in this Agreement. The
Revolving Lenders shall be obligated to fund pro rata according to their
respective pro rata percentages shown in Section 2.1 of this Agreement any draws
on such Letters of Credit and shall be entitled to share pro rata in the Letter
of Credit Fees and reimbursement amounts received in connection with such
Letters of Credit. The Letter of Credit Amount outstanding at any time shall
operate to reduce amounts available to be drawn under the Base Revolving Credit
Facility by such sum, and shall be deemed to be outstanding for purposes of
calculating the commitment fee under Section 2.2 (a) of this Agreement. No
Letter of Credit shall have a maturity date occurring later than the Termination
Date of this Agreement; provided, however, FNB-O, upon five days prior written
notice to the other Revolving Lenders, may issue one or more Letters of Credit
in an aggregate amount not to exceed $1,000,000.00 in Letters of Credit under
this Agreement with a maturity

                                     - 15 -

<PAGE>

occurring after the Termination Date of this Agreement (a "Non-Conforming Letter
of Credit"), but no other Revolving Lender shall be obligated to fund any draws
on such Non-Conforming Letters of Credit and shall not be entitled to share pro
rata in the Letter of Credit Fees and reimbursement amounts received in
connection therewith unless such Revolving Lender elects in writing to
participate in such Non-Conforming Letters of Credit after receipt of notice
from FNB-O. Except as provided in the preceding sentence, any such
Non-Conforming Letters of Credit shall in all other respects be deemed a "Letter
of Credit" under this Agreement. Any reference in this Agreement (including
without limitation Articles VII and VIII) to a "loan" or "loans" made under this
Agreement shall include the Letters of Credit, and, for purposes of Article VII,
amounts outstanding under the Notes shall be deemed to include amounts available
to be drawn and unreimbursed drawings under issued and outstanding Letters of
Credit.

         2.8      Letter of Credit Documents. Prior to the issuance by FNB-O of
any Letters of Credit, the Borrower and, if requested by FNB-O, the applicable
Subsidiary, shall execute and deliver to FNB-O an application and continuing
letter of credit agreement, such agreements to be in the form provided by FNB-O,
as may be amended from time to time for general use in connection with letters
of credit issued by FNB-O.

         2.9      Letter of Credit Fees. In addition to all costs incurred by
FNB-O in the issuance and enforcement of the Letters of Credit which are to be
reimbursed by the Borrower in accordance with the application and continuing
letter of credit agreement executed in connection with each Letter of Credit,
the Borrower shall pay to the Agent a letter of credit fee (the "Letter of
Credit Fee") equal to two percent (2.0%) per annum of the amounts available to
be drawn under outstanding Letters of Credit, such fee to be based on the
average Letter of Credit Amount outstanding during such quarter; provided,
however, that at any time that an Event of Default has occurred and is
continuing under the Agreement, such fee shall be equal to five percent (5%) per
annum. Such fee shall accrue from the first day of each calendar quarter and
shall be payable in arrears on the tenth (10th) day of the month following the
end of each calendar quarter; provided, however, that the Letter of Credit Fee
for the calendar quarter ending December 31st, 2003 shall accrue from December
15, 2003. Interest shall accrue on amounts drawn under any Letter of Credit,
until such amount is reimbursed, at the then current rate for amounts
outstanding under the Notes and, for any period that such draw remains
unreimbursed more than two Business Days after such draw, at the Default Rate.
Agent at its sole option shall have the right to make an advance under the Base
Revolving Credit Facility to repay any unreimbursed draws under a Letter of
Credit. In addition, the Borrower shall pay such other administrative fees,
including a fee for opening the Letter of Credit, as are agreed in writing
between FNB-O and the Borrower. Amounts received by FNB-O for opening a
Non-Conforming Letter of Credit or as administrative fees with respect to any
Letter of Credit remain the property of FNB-O and shall not be shared pro rata
with the Revolving Lenders. Letter of Credit Fees shall accrue based on a year
of 360 days, and for actual days elapsed.

         2.10     Voluntary Reduction or Termination of Base Revolving Credit
Facility. The Borrower may from time to time on at least two (2) Business Days'
prior written notice to the Agent (which shall promptly advise each Revolving
Lender thereof) permanently reduce the amount of the Base Revolving Credit
Facility to an amount not less than the then-outstanding Principal Loan Amount;
provided, however, that any such reduction shall be in an aggregate minimum
amount of $5,000,000.00 and integral multiples of $1,000,000.00 in excess of
that

                                     - 16 -

<PAGE>

amount. Concurrently with any reduction of the amount of the Base Revolving
Credit Facility to zero, as provided in the first sentence of this Section 2.10,
the Borrower shall pay all interest on the Advances and all fees. All reductions
of the Base Revolving Credit Facility shall reduce the Commitments pro rata
among the Revolving Lenders.

         2.11     Payment Receipt. Payments received before 12:00 noon on any
Business Day will be credited the same Business Day. Payments received after
12:00 noon on any Business Day will be credited the next Business Day.

                       III. REPRESENTATIONS AND WARRANTIES

         The Borrower represents and warrants that as of the date hereof and as
of the date of each and every request for an Advance hereunder, the following
are and shall be true and correct:

         3.1      Corporate Existence. Each of the Borrower and its Subsidiaries
is a corporation or limited liability company duly organized, validly existing
and in good standing under the laws of the state of its organization and duly
qualified and in good standing in all states where it is doing business except
where the failure to be so qualified would not have a material adverse effect on
it and its Subsidiaries taken as a whole, and it has full corporate or limited
liability company power and authority to own and operate its properties and to
carry on its business.

         3.2      Corporate Authority. Each of the Borrower and the Guarantors
has full corporate power, authority and legal right to execute, deliver and
perform the Operative Documents to which it is a party, and all other
instruments and agreements contemplated hereby and thereby, and to perform its
obligations hereunder and thereunder; and such actions have been duly authorized
by all necessary corporate action, and are not in conflict with any applicable
law or regulation, or any order, judgment or decree of any court or other
governmental agency or instrumentality or its articles of incorporation or
bylaws, or with any provisions of any indenture, contract or agreement to which
it or any of its Subsidiaries is a party or by which it or any of its
Subsidiaries or any of its or their property may be bound.

         3.3      Validity of Agreements. The Operative Documents of the
Borrower and each of the Guarantors have been duly authorized, executed and
delivered and constitute their legal, valid and binding agreements, enforceable
against the Borrower and the Guarantors in accordance with their respective
terms (except to the extent that enforcement thereof may be limited by any
applicable bankruptcy, reorganization, moratorium or similar laws now or
hereafter in effect, or by principles of equity).

         3.4      Litigation. Neither the Borrower nor any Subsidiary is a party
to any pending lawsuit or proceeding before or by any court or governmental body
or agency, which is likely to have a material adverse effect on (a) the
Borrower's ability or any Guarantor's ability to perform its obligations under
its Operative Documents or (b) a Subsidiary's ability to pay dividends to the
Borrower, to the extent that such impaired ability would have a material adverse
effect on the Borrower and its Subsidiaries, taken as a whole; nor is the
Borrower aware of any threatened lawsuit or proceeding, to which it or any
Subsidiary may become a party or of any investigation of any Court or
governmental body or agency into its affairs, which if instituted would have a
material adverse effect upon the Borrower's ability or any Guarantor's ability
to perform its

                                     - 17 -

<PAGE>

obligations under its Operative Documents or a Subsidiary's ability to pay
dividends to the Borrower, to the extent that such impaired ability would have a
material adverse effect on the Borrower and its Subsidiaries taken as a whole.

         3.5      Governmental Approvals. The execution, delivery and
performance by the Borrower and the Guarantors of the Operative Documents do not
require the consent or approval of, the giving of notice to, the registration
with, or the taking of any other action in respect of, any federal, state or
other governmental authority or agency other than as contemplated herein and
therein.

         3.6      Defaults Under Other Documents. Neither the Borrower nor any
Subsidiary is in default or in violation (nor has any event occurred which, with
notice or lapse of time or both, would constitute a default or violation) under
any document or any agreement or instrument to which it may be a party or under
which it or any of its properties may be bound, the result of which would have a
material adverse effect upon the Borrower's ability or any Guarantor's ability
to perform its obligations under its Operative Documents or a Subsidiary's
ability to pay dividends to the Borrower and/or the Guarantors, to the extent
that such impaired ability would have a material adverse effect on the Borrower
and its Subsidiaries, taken as a whole.

         3.7      Judgments. There are no outstanding or unpaid judgments (which
are not adequately bonded) of the Borrower or any Subsidiary which would have a
material adverse effect upon the Borrower's ability or any Guarantor's ability
to perform its obligations under its Operative Documents or a Subsidiary's
ability to pay dividends to the Borrower and/or the Guarantors, to the extent
that such impaired ability would have a material adverse effect on the Borrower
and its Subsidiaries, taken as a whole.

         3.8      Compliance with Laws. Neither the Borrower nor any Subsidiary
is in violation of any laws, regulations or judicial or governmental decrees in
any respect which would have any material adverse effect upon the validity or
enforceability of any of the terms of the Borrower or any Guarantor's Operative
Documents or which would have a material adverse effect upon the Borrower's
ability or any Guarantor's ability to perform its obligations under its
Operative Documents or a Subsidiary's ability to pay dividends to the Borrower
and/or the Guarantors, to the extent that such impaired ability would have a
material adverse effect on the Borrower and its Subsidiaries, taken as a whole.

         3.9      Taxes. All tax returns of the Borrower and its Subsidiaries
for material taxes required to be filed have been filed or extensions permitted
by law have been obtained; all taxes of the Borrower and its Subsidiaries of a
material nature and which are due and payable as reflected on such returns have
been paid, other than taxes which are due but for which only a nominal late
payment penalty is payable and for which the taxing authority is not yet
entitled to enforce its remedies for payment thereof and other than taxes being
contested in good faith and with respect to which adequate reserves have been
established; and no material amounts of taxes of the Borrower and its
Subsidiaries not reflected on such returns are payable.

         3.10     Collateral. The Borrower and each Guarantor have good title to
the Collateral and the Collateral is free from all liens, encumbrances or
security interests, except for Permitted Liens and except as disclosed on
Exhibit D attached hereto. The Borrower is a Delaware

                                     - 18 -

<PAGE>

corporation with its principal place of business, chief executive office, and
the principal place where it keeps its records concerning the Collateral at 4211
South 102nd Street, Omaha, Nebraska 68127.

         3.11     Pension Benefits. Neither the Borrower nor any Subsidiary
maintains a Plan as defined in Section 3(3) of ERISA, or each such entity is in
compliance with the minimum funding requirements with respect to any such Plan
maintained by it to the extent applicable, and it has not incurred any material
liability to the Pension Benefit Guaranty Corporation (other than liability for
premiums) or otherwise under ERISA in connection with any such Plan.

         3.12     Margin Regulations. No part of the proceeds of any Advance
hereunder shall be used for any purpose that violates, or which is inconsistent
with, the provisions of Regulation T, U or X of the Board of Governors of the
Federal Reserve System of the United States.

         3.13     Financial Condition. The financial condition of the Borrower
and its Subsidiaries is fairly presented in all material respects in the most
recent financial statement which has been provided to the Agent and such
financial statement does not contain any untrue statements of a material fact or
omit to state any material fact necessary to make the statement therein not
misleading in light of the circumstances under which it was made. No material
adverse change has occurred since the date of such financial statement.

                                  IV. COVENANTS

         The Borrower hereby covenants that:

         4.1      Financial Reports.

                  (a) Within thirty (30) days after the end of each month, the
         Borrower, at its sole expense, shall furnish the Agent a consolidated
         balance sheet, a statement of earnings of the Borrower and its
         consolidated Subsidiaries, and a statement of cash flows of the
         Borrower and its consolidated Subsidiaries, all such financial
         statements to be prepared in accordance with GAAP consistently applied
         and certified as fairly presenting, in all material respects, the
         financial condition of the Borrower and its consolidated Subsidiaries,
         subject to normal changes resulting from year-end audit adjustments, by
         the chief financial officer of the Borrower.

                  (b) Within ninety (90) days after the close of the Borrower's
         fiscal year, the Borrower, at its sole expense, shall furnish the
         Agent: (i) a consolidated balance sheet, a statement of earnings of the
         Borrower and its consolidated Subsidiaries and a statement of cash
         flows of the Borrower and its consolidated Subsidiaries, certified by
         Deloitte & Touche LLP, or other comparable nationally recognized
         independent certified public accountants, that such financial reports
         fairly present in all material respects the financial condition of the
         Borrower and its consolidated Subsidiaries and have been prepared in
         accordance with GAAP consistently applied; and (ii) a certificate from
         such accountants certifying that in making the requisite audit for
         certification of the Borrower's financial statements, the auditors
         either (1) have obtained no knowledge, and are not otherwise aware of,
         any condition or event which constitutes an Event of Default or which
         with the passage of time or the giving of notice would constitute an
         Event of Default under this

                                     - 19 -

<PAGE>

         Agreement; or (2) have discovered such condition or event, as
         specifically set forth in such certificate, which constitutes an Event
         of Default or which with the passage of time or the giving of notice
         would constitute an Event of Default under such sections. The auditors
         shall not be liable to the Revolving Lenders by reason of the auditors'
         failure to obtain knowledge of such event or condition in the ordinary
         course of their audit unless such failure is the result of negligence
         or willful misconduct in the performance of the audit.

                  (c) Within thirty (30) days after submission to the Securities
         and Exchange Commission, the Borrower shall provide to the Agent copies
         of its Forms 10K and 10Q, as submitted to the Securities and Exchange
         Commission during the term of this Agreement, plus consolidating
         statements of the Borrower and its consolidated Subsidiaries, including
         a balance sheet, a statement of earnings and a statement of cash flows.

                  (d) Within thirty (30) days after the end of each month, the
         Borrower shall cause Ameritrade Online and iClearing to provide to the
         Agent the FOCUS report of Ameritrade, Inc. and iClearing for such
         month.

                  (e) Within thirty (30) days after the end of each month, the
         Borrower, at its sole expense, shall furnish the Agent a liquidity
         certificate of the chief financial officer of the Borrower in the form
         of Exhibit C attached hereto, setting forth such information (including
         detailed calculations) sufficient to verify the conclusions of such
         officer after due inquiry and review.

                  (f) The Borrower shall provide the Agent with such other
         financial reports and statements as the Revolving Lenders may
         reasonably request.

                  4.2      Corporate Structure and Assets.

                  (a) The Borrower shall not, and shall not permit any Guarantor
         to, merge or consolidate with any other corporation or entity without
         the prior written consent of the Requisite Revolving Lenders, except as
         provided in clause (b) below.

                  (b) The foregoing restriction on mergers and consolidations
         shall not apply if: (i) in the case of a merger, the Borrower or a
         Guarantor (provided that, in the event of a merger involving the
         Borrower, the Borrower shall be the surviving entity) is the surviving
         entity and expressly reaffirms its obligations hereunder; (ii) in the
         case of a consolidation, the resulting corporation expressly assumes
         the obligations of the Borrower or the Guarantor hereunder; (iii) the
         surviving or resulting corporation is organized under the laws of the
         United States or a jurisdiction thereof; (iv) after giving effect to
         such merger or consolidation, the surviving or resulting corporation
         will be engaged in substantially the same lines of business as are now
         engaged in by the Borrower and its Subsidiaries and businesses
         reasonably related thereto; and (v) immediately after giving effect to
         such merger or consolidation, no Event of Default will exist hereunder.

                                     - 20 -

<PAGE>

                 (c) The Borrower shall not, and shall not permit any Guarantor
         to, sell any assets, other than in the ordinary course of business, in
         an aggregate amount greater than five million dollars ($5,000,000);
         provided, however, that if the aggregate net cash proceeds obtained by
         the Borrower or any Guarantor through the sale of such assets exceeds
         one million dollars ($1,000,000), then the amount of such net cash
         proceeds exceeding one million dollars ($1,000,000) shall be used to
         repay the amount, if any, outstanding on the Notes. Notwithstanding the
         foregoing sentence, the following sales of assets are permitted
         hereunder, without any necessity of prepaying the Notes with the
         proceeds of such sales: (i) items that are obsolete or no longer
         necessary for operation of the business, (ii) Ameritrade Online's
         interest in Comprehensive Software Systems, Ltd., (iii) Ameritrade
         Online's interest in the NITE Stock, (iv) sales of assets to the
         Borrower or a Guarantor or another Subsidiary, (v) the interest of the
         Borrower and/or its Subsidiaries in Watcher Technologies LLC, (vi) the
         transaction with General Electric Capital Corp. related to Datek's
         building located in Jersey City, New Jersey, and (vii) the interest of
         the Borrower and/or its Subsidiaries in TradeCast, Inc., Bidwell &
         Company, Inc. and/or iClearing. Notwithstanding the foregoing
         prepayment requirements, any such prohibited sale shall remain a
         violation of this Agreement. For purposes of this Section 4.2(c), "net
         cash proceeds" shall mean the amount in cash or cash equivalents
         received from the sale after taxes and after payment of all costs and
         expenses incurred in connection with the sale, including brokerage or
         similar fees.

                  (d) In addition, the Borrower and the Guarantors shall not
         engage in any business materially different from that in which they are
         presently engaged and businesses reasonably related thereto without the
         prior written consent of the Requisite Revolving Lenders, which consent
         shall not be unreasonably withheld.

                  (e) The Borrower shall at all times maintain a one hundred
         percent (100%) ownership interest in Ameritrade Online and Datek.

         4.3      Indebtedness. The Borrower shall not, and shall not permit any
Guarantor to, have any Indebtedness other than Permitted Indebtedness.

         4.4      Use of Proceeds. No part of the proceeds of the Advances shall
be used for any purpose that violates, or which is inconsistent with, the
provisions of Regulation T, U or X of the Board of Governors of the Federal
Reserve System of the United States.

         4.5      Notice of Occurrences. The Borrower shall give to the Agent
written notification (promptly after the Borrower becomes aware thereof) of the
existence or occurrence of:

                  (a) the occurrence of an Event of Default or Potential Event
         of Default hereunder;

                  (b) any proceedings instituted by or against the Borrower or
         any Subsidiary in any federal, state or local court or before any
         governmental body or agency, or before any arbitration board, or any
         such proceedings threatened against the Borrower or any Subsidiary by
         any governmental agency, or any change in law or regulation applicable
         to the Borrower or one or more of its Subsidiaries, which event alone
         or in the aggregate is, in the Borrower's reasonable judgment, likely
         to have a material adverse effect upon the

                                     - 21 -

<PAGE>

         Borrower's ability or a Guarantor's ability to perform its obligations
         under its Operative Documents;

                  (c) any default or event of default involving the payment of
         money under any agreement or instrument which is material to the
         Borrower or any Subsidiary to which such entity is a party or by which
         it or any of its property may be bound, and which default or event of
         default would have a material adverse effect upon the Borrower's
         ability or a Guarantor's ability to perform its obligations under its
         Operative Documents;

                  (d) the commencement of any proceeding under the Federal
         Bankruptcy Code or similar law affecting creditor's rights by or
         against the Borrower or any Subsidiary; and

                  (e) pending or threatened litigation exists against the
         Borrower or any Subsidiary with a prayer for damages in excess of
         $10,000,000 or for any other relief which is likely to have a material
         adverse effect upon the Borrower's ability or a Guarantor's ability to
         perform its obligations under its Operative Documents.

         4.6      Distributions.

                  (a) The Borrower shall not declare any dividends or make any
         cash distribution in respect of any shares of its capital stock or
         warrants of its capital stock, without the prior written consent of the
         Requisite Revolving Lenders; provided, however, that the Borrower may
         declare stock dividends.

                  (b) The Borrower shall not redeem stock or Subordinated Debt
         at any time at which an Event of Default or Potential Event of Default
         has occurred and is continuing or would exist after giving effect to
         such distribution, with an aggregate redemption value greater than
         Minimum Liquid Assets as of the date of distribution.

                  (c) Neither the Borrower nor any Subsidiary will enter into
         any agreements limiting a Subsidiary's ability to make dividends to the
         Borrower which are more restrictive than the net capital rule
         promulgated under Section 15(c) of the Exchange Act.

         4.7      Compliance with Law and Regulations. The Borrower and each
Subsidiary shall comply in all material respects with all applicable federal and
state laws and regulations except when the failure to so comply would not have a
material adverse effect on the Borrower's business.

         4.8      Maintenance of Property; Accounting; Corporate Form; Taxes;
Insurance.

                  (a) The Borrower and each Subsidiary shall maintain its
         property in good condition in all material respects, ordinary wear and
         tear excepted.

                  (b) The Borrower and each Subsidiary shall keep true books of
         record and accounts in which full and correct entries shall be made of
         all its business transactions, all in accordance with GAAP consistently
         applied.

                                     - 22 -

<PAGE>

                  (c) The Borrower and each Subsidiary shall do or cause to be
         done all things necessary to preserve and keep in full force and effect
         its corporate or limited liability company form of existence as is
         necessary for the continuation of its business in substantially the
         same form, except where such failure to do so with respect to any
         Subsidiary would not have a material adverse effect on the ability of
         the Borrower or of any Guarantor to perform its obligations under the
         Operative Documents.

                  (d) The Borrower and each Subsidiary shall pay all taxes,
         assessments and governmental charges or levies imposed upon it or its
         property; provided, however, that the Borrower or any Subsidiary shall
         not be required to pay any of the foregoing taxes which are being
         diligently contested in good faith by appropriate legal proceedings and
         with respect to which adequate reserves have been established.

         4.9      Inspection of Properties and Books. Each of the Borrower and
each Guarantor shall recognize and honor the right of the Revolving Lenders,
upon reasonable advance notice to an officer of such entity, to visit and
inspect, during normal business hours, any of the properties of, to examine the
books, accounts, and other records of, and to take extracts therefrom and to
discuss the affairs, finances, loans and accounts of, and to be advised as to
the same by the officers of, such entity at all such times, in such detail and
through such agents and representatives as the Revolving Lenders may reasonably
desire.

         4.10     Guaranties. Neither the Borrower nor any Subsidiary shall
guaranty or become responsible for the Indebtedness (other than Permitted
Indebtedness) of any other person or entity (other than wholly-owned
Subsidiaries) in excess of an aggregate amount outstanding at any time of
$1,000,000; provided, however, that, pursuant to the Guarantor Documents,
Ameritrade Online and Datek shall act as guarantors of the obligations of the
Borrower under the Operative Documents.

         4.11     Collateral. The Borrower shall not, and shall not permit any
Guarantor to, incur or permit to exist any mortgage, pledge, lien, security
interest or other encumbrance on the Collateral, other than Permitted Liens and
except as otherwise permitted in the Security Agreements or the Pledge
Agreements.

         4.12     Name; Location. The Borrower shall, and shall cause any
Guarantor to, give the Agent thirty (30) days notice prior to changing its name,
identity or corporate structure, state of incorporation, or its principal place
of business, chief executive office or the place where it keeps its records
concerning the Collateral.

         4.13     Notice of Change in Ownership or Management. During the term
of this Agreement, the Borrower shall give the Revolving Lenders notice of the
occurrence of any change, directly or indirectly, in the existing controlling
interest in any Guarantor, which notice shall be given as soon as the Borrower
obtains notice or knowledge of such change.

         4.14     Subordinated Debt. After the date of this Agreement, the
Borrower shall not, and shall not permit any Subsidiary to, incur any
subordinated debt or issue any preferred stock or warrants for preferred stock
except upon the prior written consent of the Requisite Revolving Lenders. The
Borrower shall not, and shall not permit any Subsidiary to, amend its articles
of

                                     - 23 -

<PAGE>

incorporation or any other documents or agreements relating to the issuance
of subordinated debt, preferred stock or warrants for preferred stock without
the prior written consent of the Requisite Revolving Lenders.

         4.15     Capital Expenditures. The Borrower and the Subsidiaries shall
not incur capital expenditures commencing with the fiscal year beginning
September __, 2003, determined in accordance with generally accepted accounting
principles, of more than $50,000,000.00 in the aggregate.

         4.16     Acquisitions; Investments.

                  (a) Acquisitions. The Borrower shall not, and shall not permit
         any Subsidiaries to, make any Acquisitions without the prior written
         consent of the Requisite Revolving Lenders; provided, however, that
         without the consent of the Requisite Revolving Lenders the Borrower and
         its Subsidiaries shall be permitted to make in any fiscal year of the
         Borrower the following: (i) Acquisitions for which the Borrower or a
         Subsidiary pays cash in an aggregate amount not to exceed $75,000,000;
         and (ii) Acquisitions the consideration for which is payable by the
         issuance by the Borrower of capital stock having a value (determined,
         with respect to the consideration for any such Acquisition, at the time
         such Acquisition is consummated) not to exceed $250,000,000.00 in the
         aggregate. Notwithstanding the foregoing, Acquisitions permitted under
         this Section must be of such entities that are in similar lines of
         business as the Borrower and its Subsidiaries as of the date hereof.

                  (b) Investments. The Borrower shall not, and shall not permit
         any Subsidiaries to, acquire any Investments without the prior written
         consent of the Requisite Revolving Lenders; provided, however, that
         without the consent of the Requisite Revolving Lenders the Borrower and
         its Subsidiaries shall be permitted to make in any fiscal year of the
         Borrower the following Investments: (i) Permitted Investments; (ii)
         short term equity positions held by any Subsidiary that is a
         broker-dealer, in the normal course of its securities clearing
         business; (iii) Derivatives entered into in the ordinary course of
         business provided that Derivative Indebtedness does not at any time
         exceed $10,000,000 in the aggregate; (iv) bank deposits in the ordinary
         course of business; (v) contributions by the Borrower or any Subsidiary
         to the capital of any of its Subsidiaries; (vi) Investments by the
         Borrower in any Subsidiary or by any Subsidiary in the Borrower, or by
         any Subsidiary in any Subsidiary, by way of intercompany loans,
         advances or guaranties, so long as any Subsidiary receiving such
         Investment is wholly-owned by the Borrower or by a Guarantor and one
         hundred percent (100%) of such Subsidiary's stock or other equity
         interests are pledged to the Agent for the benefit of the Revolving
         Lenders; and (vii) Investments in securities of account debtors
         received pursuant to any plan of reorganization or similar arrangement
         upon the bankruptcy or insolvency of such account debtors or in
         connection with any workout or restructuring of obligations of such
         account debtors. Any Investment which when made complies with the
         requirements of the definition of the term "Permitted Investment" may
         continue to be held notwithstanding that such Investment if made
         thereafter would not comply with such requirements; provided, however,
         Investments which cease to meet the requirements of clauses (a) - (e)
         of the Permitted Investments shall not be deemed to be Cash

                                     - 24 -

<PAGE>

         Equivalents. Notwithstanding the foregoing, the Borrower shall not be
         permitted to act as a market maker or to conduct trading activities,
         and no Subsidiary shall be permitted to conduct trading activities for
         its own account or to act as a market maker.

         4.17     Subsidiaries. The Borrower shall give prompt written notice to
the Revolving Lenders of the Borrower's intent to acquire, or the Borrower's
acquisition of, any Material Subsidiary. Upon the creation or acquisition of
such Material Subsidiary, the Borrower shall cause a first security interest in
the Borrower's equity interest in such Material Subsidiary to be perfected in
favor of FNB-O, as agent for the Revolving Lenders; provided, however, that the
Borrower shall not pledge to Agent any investment property or equity securities
issued by any Material Subsidiary of the Borrower that is organized under the
laws of any jurisdiction other than the United States of America (or any state
thereof) in excess of sixty-five percent (65%) of the total voting power of all
equity securities of such Material Subsidiary. The Borrower shall cause a
Guarantor to give prompt written notice to the Revolving Lenders of that
Guarantor's intent to acquire, or the Guarantor's acquisition of, any Material
Subsidiary. Upon the creation or acquisition of such Material Subsidiary, each
Guarantor shall cause a first security interest in such Guarantor's equity
interest in such Material Subsidiary to be perfected in favor of FNB-O, as agent
for the Revolving Lenders; provided, however, that the Guarantors shall not
pledge to Agent any investment property or equity securities issued by any
Material Subsidiary of any Guarantor that is organized under the laws of any
jurisdiction other than the United States of America (or any state thereof) in
excess of sixty-five percent (65%) of the total voting power of all equity
securities of such Material Subsidiary.

         4.18     Regulatory Net Capital Requirement. Ameritrade, Inc.,
iClearing and any other Broker-Dealer Subsidiary that is a Material Subsidiary
will have Regulatory Net Capital at all times in compliance with law but in no
event less than five percent (5%) of aggregate debit items.

         4.19     Leverage Ratio. The Borrower shall at all times maintain on a
consolidated basis a Leverage Ratio of not less than one hundred two percent
(102%).

         4.20     Taxes. The Borrower shall, and shall cause its Subsidiaries
to, pay all Federal and other material taxes imposed upon them before any
penalties or interest accrue thereon; provided, however, that no such taxes need
be paid for so long as they are being diligently contested in good faith by
appropriate proceeding and with respect to which adequate reserves in accordance
with GAAP have been established.

         4.21     ERISA. The Borrower shall not, and shall not permit any of its
Subsidiaries, to:

                  (a) (i) engage in any transaction in connection with which the
         Borrower or any Subsidiary reasonably could be subject to either a
         criminal or civil penalty under section 501 or 502(i) of ERISA or a tax
         imposed by section 4975 of the Internal Revenue Code of 1986, as
         amended from time to time, (ii) fail to make full payment when due of
         all amounts which would be deductible by the Borrower or a Subsidiary
         and which, under the provisions of any Plan, applicable law or
         applicable collective bargaining agreement, the Borrower or any
         Subsidiary is required to pay as contributions thereto, or (iii) permit
         to exist any accumulated funding deficiency, whether or not waived,
         with respect to any

                                     - 25 -

<PAGE>

         Plan, if, in the case of any of subdivision (i), (ii) or (iii) above,
         such penalty or tax, or the failure to make such payment, or the
         existence of such deficiency, as the case may be, could have a material
         adverse effect on (a) the Borrower's or its Subsidiaries' abilities to
         conduct their business, (b) a Subsidiary's ability to pay dividends to
         the Borrower, to the extent that such impaired ability would have a
         material adverse effect on the Borrower and its Subsidiaries, taken as
         a whole, or (c) the Borrower's ability or any Guarantor's ability to
         perform its obligations under the Operative Documents; or

                  (b) permit the aggregate complete or partial withdrawal
         liability under Title IV of ERISA which is due and unpaid with respect
         to all Plans which are multiemployer plans (as defined in Section
         4001(a)(3) of ERISA) incurred by the Borrower or one or more of its
         Subsidiaries to exceed $1,000,000.

         4.22     Expenses. The Borrower shall, immediately upon demand by the
Agent, reimburse the Agent for all reasonable and documented costs and expenses,
including reasonable and documented fees and expenses of counsel to the Agent,
incurred by the Agent in connection with the negotiation and documentation of
this Agreement, such payment to be payable at closing, and in connection with
the transaction contemplated by the Operative Documents after the closing,
including without limitation, any waiver, amendment or enforcement thereof, such
payment to be payable on demand by the Agent. After the occurrence of an Event
of Default, the Borrower shall, immediately upon demand, reimburse each
Revolving Lender for all reasonable and documented costs and expenses, including
reasonable and documented fees and expenses of counsel to such Revolving Lender,
incurred by such Revolving Lender in connection with enforcing such Revolving
Lender's rights under the Operative Documents, including, without limitation, in
the context in, of and related to any bankruptcy case and any proceedings in any
such bankruptcy case.

                             V. CONDITIONS PRECEDENT

         5.1      Closing Conditions. Any and all obligations of the Revolving
Lenders to make their initial Advances hereunder are subject to satisfaction of
the following conditions precedent:

                  (a) FNB-O, as agent, shall have received an opinion of counsel
         to the Borrower and the Guarantors covering such matters as the Agent
         may request (including, without limitation, corporate existence and
         good standing, corporate authority, due authorization, execution and
         delivery of the Operative Documents, and the legal, valid, binding and
         enforceable nature of the Operative Documents), such opinion to be
         satisfactory in form and substance to counsel to FNB-O;

                  (b) FNB-O, as agent, shall have received such certificates and
         documents as the Agent may reasonably request from the Borrower and the
         Guarantors, including articles of incorporation and bylaws,
         certificates regarding good standing, incumbency, copies of other
         corporate documents, and appropriate authorizing resolutions;

                  (c) the Operative Documents shall have been duly authorized
         and executed and shall be in full force and effect, and such UCC
         financing statements shall have been

                                     - 26 -

<PAGE>

         amended or continued as may be appropriate to perfect or continue the
         perfection of the security interest of FNB-O, as agent for the
         Revolving Lenders, in the Collateral;

                  (d) the Borrower and the Guarantors shall have delivered to
         FNB-O as agent such additional certificates covered by the Pledge
         Agreements, if any, to perfect the security interest of FNB-O, as agent
         for the Revolving Lenders, in the Collateral and such related stock
         powers, if any, endorsed in blank, or, at the option of FNB-O, evidence
         of the recording of the interest of FNB-O as agent in book entry form;
         and

                  (e) the Borrower shall have paid the reasonable and documented
         fees and expenses of counsel to the Agent in connection with the
         preparation, negotiation and execution of the Operative Documents.

                            VI. DEFAULTS AND REMEDIES

         6.1      Events of Default. Any of the following shall be deemed an
event of default under this Agreement (an "Event of Default"):

                  (a) Any payment of principal required by any of the Operative
         Documents shall not be paid within three (3) Business Days after the
         date on which such payment was invoiced or due.

                  (b) Any payment of interest or other fees due hereunder or
         under any of the Operative Documents shall not be paid within three (3)
         Business Days after the date on which such payment was invoiced or due.

                  (c) Any representation or warranty of the Borrower or any
         Guarantor under any of the Operative Documents, or any financial
         reports or statements or certificates submitted pursuant to this
         Agreement, shall prove to have been false in any material respect when
         made.

                  (d) A failure of the Borrower or any Subsidiary to comply with
         any requirement or restriction applicable to such entity and contained
         in Sections 4.2, 4.3, 4.6, 4.10, 4.11, 4.14, 4.15, 4.16, 4.18, 4.19,
         4.20 (but solely if a lien has attached to assets of the Borrower or
         any Subsidiary as a result of such failure) or 4.21 of this Agreement.

                  (e) A failure of the Borrower, any Guarantor or any Subsidiary
         to comply with any requirement or restriction contained in any
         provision of the Operative Documents not otherwise specified in this
         Article VI, which failure remains unremedied for thirty (30) days
         following knowledge or receipt of notice as to such failure from any
         source.

                  (f) The occurrence of a default or a breach of any of the
         obligations of the Borrower or any Subsidiary (other than obligations
         of such Subsidiary to the Borrower) under any note, loan agreement,
         preferred stock, subordinated debt instrument or agreement (including
         the Subordinated Debt) or any other agreement evidencing an obligation
         to repay borrowed money when the aggregate amount of indebtedness
         thereby affected, as to the Borrower and/or any Subsidiary, exceeds
         $5,000,000.

                                     - 27 -

<PAGE>

                  (g) The entry of a final judgment that exceeds $10,000,000
         against the Borrower or any Subsidiary for the payment of money, which
         is not covered by insurance, and the expiration of thirty (30) days
         from the date of such entry during which the judgment is not discharged
         in full or stayed.

                  (h) The occurrence of any one or more of the following:

                           (1) The Borrower or any Subsidiary shall file a
                  voluntary petition in bankruptcy or an order for relief shall
                  be entered in a bankruptcy case as to such entity or shall
                  file any petition or answer seeking or acquiescing in any
                  reorganization, arrangement, composition, readjustment,
                  liquidation, dissolution or similar relief for itself under
                  any present or future federal, state or other statute, law or
                  regulation relating to bankruptcy, insolvency or other relief
                  for debtors; or shall seek or consent to or acquiesce in the
                  appointment of any trustee, receiver or liquidator of such
                  entity or of all or any part of its property, or of any or all
                  of the royalties, revenues, rents, issues or profits thereof,
                  or shall make any general assignment for the benefit of
                  creditors, or shall admit in writing its inability to pay its
                  debts or shall generally not pay its debts as they become due;
                  or

                           (2) A court of competent jurisdiction shall enter an
                  order, judgment or decree approving a petition filed against
                  the Borrower or any Subsidiary seeking any reorganization,
                  dissolution or similar relief under any present or future
                  federal, state or other statute, law or regulation relating to
                  bankruptcy, insolvency or other relief for debtors, and such
                  order, judgment or decree shall remain unvacated and unstayed
                  for an aggregate of sixty (60) days (whether or not
                  consecutive) from the first date of entry thereof; or any
                  trustee, receiver or liquidator of the Borrower or any
                  Subsidiary or of all or any part of its property, or of any or
                  all of the royalties, revenues, rents, issues or profits
                  thereof, shall be appointed without the consent or
                  acquiescence of such entity and such appointments shall remain
                  unvacated and unstayed for an aggregate of sixty (60) days
                  (whether or not consecutive); or

                           (3) A writ of execution or attachment or any similar
                  process shall be issued or levied against all or any part of
                  or interest in the Collateral, or any judgment involving
                  monetary damages shall be entered against the Borrower or any
                  Subsidiary which shall become a lien on the Collateral or any
                  portion thereof or interest therein and such execution,
                  attachment or similar process or judgment is not released,
                  bonded, satisfied, vacated or stayed within thirty (30) days
                  after its entry or levy.

                  (i) A Change of Control shall occur.

                  (j) Any adverse regulatory action has been taken against the
         Borrower or one or more of its Subsidiaries which will materially
         adversely affect (a) the Borrower's or its Subsidiaries' abilities to
         conduct their business, (b) a Subsidiary's ability to pay dividends to
         the Borrower, to the extent that such impaired ability would have a
         material adverse effect on the Borrower and its Subsidiaries, taken as
         a whole, or (c) the

                                     - 28 -

<PAGE>

         Borrower's ability or any Guarantor's ability to perform its
         obligations under this Agreement or any of the Operative Documents.

                  (k) Any litigation has been filed against the Borrower or one
         or more of its Subsidiaries which will materially adversely affect (a)
         the Borrower's or its Subsidiaries' abilities to conduct their
         business, (b) a Subsidiary's ability to pay dividends to the Borrower,
         to the extent that such impaired ability would have a material adverse
         effect on the Borrower and its Subsidiaries, taken as a whole, or (c)
         the Borrower's ability or any Guarantor's ability to perform its
         obligations under this Agreement or any of the Operative Documents.

         6.2      Remedies. If an Event of Default occurs and is continuing,
upon the election of the Requisite Revolving Lenders, the entire unpaid
principal amount under the Notes, together with interest accrued thereon, shall
become immediately due and payable without presentment, demand, protest or
notice of any kind, all of which are hereby expressly waived, the Commitments of
the Revolving Lenders hereunder shall terminate, and the Revolving Lenders may
exercise their rights under the other Operative Documents or the Notes,
including, without limitation, under the Security Agreements and the Pledge
Agreements. Upon the occurrence of an Event of Default described in Section
6.1(h)(1) or (2) hereof, acceleration under this Section 6.2 shall occur
automatically without the election, declaration, notice or other act on the part
of any of the Revolving Lenders. In addition, the Revolving Lenders shall have
such other remedies as are available at law and in equity. Remedies under this
Agreement, the Operative Documents, and the Notes are cumulative. Any waiver
must be in writing by the Revolving Lenders and no waiver shall constitute a
waiver as to any other occurrence which constitutes an Event of Default or as to
any party not specifically included in such written waiver.

                         VII. INTER-CREDITOR AGREEMENTS

         7.1      FNB-O as Servicer. FNB-O will act as sole servicer of the
loans evidenced by the Notes. For purposes of this Article VII, the term Event
of Default means any Event of Default hereunder. FNB-O will enforce, administer
and otherwise deal with the loans made by the Revolving Lenders in accordance
with safe and prudent banking standards employed by FNB-O in the case of the
loan made by FNB-O. Without limiting the generality of the foregoing, FNB-O
will, on its own behalf and on behalf of the Revolving Lenders: (i) maintain
originals of the Operative Documents (excluding the Notes); (ii) receive
requests for Advances from the Borrower, promptly transmit the same to the
Revolving Lenders and make such Advances on behalf of the Revolving Lenders
(provided that FNB-O is assured of reimbursement therefor by the other Revolving
Lenders for their pro rata shares); (iii) receive payments and prepayments from
the Borrower and apply such payments as provided in Section 7.2; (iv) receive
notices and financial statements from the Borrower and send copies thereof to
the Revolving Lenders if FNB-O has reasonable cause to believe that such
Revolving Lenders have not received such notice or financial statement from
another source; and (v) advise the Revolving Lenders of the occurrence of any
Event of Default of which FNB-O obtains actual knowledge. The Revolving Lenders
agree not to attempt to take any action against the Borrower under the Operative
Documents or the Notes, or with respect to the indebtedness evidenced thereby
without FNB-O's consent unless the Requisite Revolving Lenders shall have
requested FNB-O to take specific

                                     - 29 -

<PAGE>

action against the Borrower and FNB-O shall have failed to do so within a
reasonable period after receipt of such request. All actions, consents, waivers
and approvals by the Revolving Lenders shall be deemed taken or given and
amendments hereto deemed agreed to if the Requisite Revolving Lenders shall have
indicated their consent thereto. Notwithstanding the foregoing, approval of a
Revolving Lender shall be required for: (i) any reduction or compromise of the
principal loan amount of any Note held by such Lender, the amount or rate of
interest accrued or accruing thereon or the fees due hereunder; and (ii)
extension of the date of any scheduled payment under such Note; and unanimous
consent of all the Revolving Lenders shall be required for (iii) permitting the
sale of or releasing the security interest of the Revolving Lenders in
Collateral which comprises more than ten percent (10%) of net book value of
fixed assets of the Borrower on a consolidated basis (other than sales or
dispositions permitted by Section 4.2 and releases of Collateral in connection
with such sales and dispositions); and (iv) any amendment of Sections 7.1 or 7.2
hereof. The Revolving Lenders irrevocably authorize the Agent, at its option and
in its discretion, (a) to release any Lien granted to or held by the Agent under
any Operative Document (i) upon termination of the Commitments and payment in
full of all Revolving Loans and all other obligations of the Borrower hereunder
and the expiration or termination of all Letters of Credit; (ii) constituting
property sold or to be sold or disposed of as part of or in connection with any
disposition permitted hereunder; or (iii) if approved, authorized or ratified in
writing by the Requisite Revolving Lenders, or all Revolving Lenders if required
by clause (iii) of the immediately preceding sentence; or (b) to subordinate its
interest in any collateral to any holder of a Lien on such collateral that is
permitted by clause (viii) or (xi) of the definition of "Permitted Liens". Upon
request by the Agent at any time, the Revolving Lenders will confirm in writing
the Agent's authority to release, or subordinate its interest in, particular
types or items of collateral pursuant to this Section 7.1. A Revolving Lender's
commitment hereunder may not be increased without the consent of such Revolving
Lender, it being understood, however, that increases in the total revolving
credit facility hereunder may be made with the consent of the Requisite
Revolving Lenders, so long as such increase does not result in the increase of
any non-consenting Revolving Lender's commitment hereunder.

         7.2      Application of Payments. At all times other than when an Event
of Default has occurred and is continuing, payments or prepayments made by the
Borrower may be applied to the indebtedness designated by the Borrower or
otherwise applied as follows:

                  (a) first, to pay interest to date on the Notes and fees due
         to the Revolving Lenders;

                  (b) second, pro rata to the Revolving Lenders, such pro rata
         share to be determined as set forth below in subsection (bb) of this
         Section 7.2.

After the occurrence and during the continuance of an Event of Default, payments
or prepayments on the Notes received by FNB-O or any of the Revolving Lenders
and funds realized upon the disposition of any of the Collateral shall be
applied as follows:

                  (aa) first, to reimburse FNB-O for any reasonable and
         documented costs, expenses, and disbursements (including reasonable and
         documented attorneys' fees) which may be incurred or made by FNB-O: (i)
         in connection with its servicing

                                     - 30 -

<PAGE>

         obligations; (ii) in the process of collecting such payments or funds;
         or (iii) as advances made by FNB-O to protect the Collateral (provided,
         however, that FNB-O shall have no obligation to make such protective
         advances); and

                  (bb) second, pari passu among the Revolving Lenders, based on
         their respective pro rata shares of the funds to be applied. Each
         Revolving Lender's pro rata share shall be equal to a fraction, (x) the
         numerator of which shall be the total principal loan amount then
         outstanding which is owing to each such Revolving Lender under its
         Notes, and (y) the denominator of which shall be the total Principal
         Loan Amount then outstanding which is owing to the Revolving Lenders
         under all Notes.

Except as specifically provided in this Section 7.2, FNB-O shall have no
obligation to repay or prepay any amount due from the Borrower to any of the
other Revolving Lenders nor shall FNB-O have any obligation to purchase all or a
part of any Note hereunder or any Advance made by any Revolving Lenders, nor
shall the Revolving Lenders have any recourse whatsoever against FNB-O with
respect to any failure of the Borrower to repay the indebtedness referenced
herein.

         7.3      Liability of FNB-O. FNB-O shall not be liable to the Revolving
Lenders for any error of judgment or for any action taken or omitted to be taken
by it hereunder, except for gross negligence or willful misconduct. Without
limiting the generality of the foregoing, FNB-O, except as expressly set forth
herein, (a) may consult with legal counsel, independent public accountants and
other experts selected by it and shall not be liable for any action taken or
omitted to be taken in good faith by it in accordance with the advice of such
counsel, accountants or experts; (b) makes no representation or warranty with
respect to, and shall not be responsible for, the accuracy, completeness,
execution, legality, validity, legal effect or enforceability of this Agreement,
the Notes, or the other Operative Documents, or the value or sufficiency of any
Collateral given by the Borrower or any Guarantor or the priority of the
Revolving Lenders' security interest therein or the financial condition of the
Borrower or any Guarantor; and (c) shall not be responsible for the performance
or observance of any of the terms, covenants or conditions of the Operative
Documents on the part of the Borrower or of any Guarantor and shall not have any
duty to inspect the property (including, without limitation, the books and
records) of the Borrower or of any Guarantor.

         7.4      Transfers. No Revolving Lender shall subdivide or transfer its
respective Notes (except to a Federal Reserve Bank) without first giving ten
(10) days prior written notice to and obtaining the prior written consent (which
consent shall not be unreasonably withheld) of FNB-O and the Borrower. No
Revolving Lender may grant a participation in any Advance hereunder without the
prior written consent of FNB-O (which consent shall not be unreasonably
withheld).

         7.5      Reliance. The Revolving Lenders acknowledge that they have
been advised that none of the Notes nor any interest therein or related thereto
has been (i) registered under the Securities Act of 1933, as amended, nor (ii)
insured by the Federal Deposit Insurance Corporation. The Revolving Lenders
acknowledge that they have received from the Borrower all financial information
and other data relevant to their decision to extend credit to the Borrower and
that they have independently approved the credit quality of the Borrower.

                                     - 31 -

<PAGE>

         7.6      Relationship of Lenders. The Revolving Lenders intend for the
relationships created by this Agreement to be construed as concurrent direct
loans from each Revolving Lender respectively to the Borrower. Nothing herein
shall be construed as a loan from any Revolving Lender to FNB-O or as creating a
partnership or joint venture relationship among them.

         7.7      New Revolving Lenders. In the event that new Revolving Lenders
are added to this Agreement, such Revolving Lenders shall be required to agree
to the inter-creditor provisions of this Article VII.

         7.8      Agenting Fee. The Borrower will pay to FNB-O a quarterly
agenting fee equal to $2,500.00, payable quarterly on or before the last day of
such quarter.

                      VIII. REIMBURSEMENTS; INDEMNIFICATION

         8.1      Capital Adequacy. If, after the date hereof, the adoption or
implementation of any applicable law, rule or regulation regarding capital
adequacy (including, without limitation, any law, rule or regulation
implementing the Basle Accord), or any change therein, or any change in the
interpretation or administration thereof by any central bank or other
governmental authority charged with the interpretation or administration
thereof, or compliance by a Revolving Lender (or its parent) with any guideline,
request or directive regarding capital adequacy (whether or not having the force
of law) of any such central bank or other governmental authority (including,
without limitation, any guideline or other requirement implementing the Basle
Accord), has or would have the effect of reducing the rate of return on such
Revolving Lender's capital as a consequence of its obligations hereunder or the
transactions contemplated hereby to a level below that which such Revolving
Lender could have achieved but for such adoption, implementation, change or
compliance (taking into consideration such Revolving Lender's policies with
respect to capital adequacy) by an amount deemed by such Revolving Lender to be
material, then such Revolving Lender shall provide to the Borrower notice of
such matter, and from time to time thereafter within ten (10) Business Days
after demand by such Revolving Lender (which demand shall be accompanied by a
statement setting forth the basis for such demand and a calculation of the
amount thereof in reasonable detail), the Borrower shall pay to such Revolving
Lender such additional amount or amounts as will compensate such Revolving
Lender for such reduction which is incurred by such Revolving Lender after the
date of such Revolving Lender's notice to the Borrower under this Section 8.1.
Notwithstanding the preceding sentence, upon Borrower's receipt of such notice
from such Revolving Lender, Borrower may provide to such Revolving Lender its
notice of prepayment in accordance with Section 2.5 hereof. A certificate of
such Revolving Lender claiming compensation under this Section and setting forth
the additional amount or amounts to be paid to it hereunder shall be prima facie
evidence thereof, provided that the determination thereof is made on a
reasonable basis. In determining such amount or amounts, such Revolving Lender
may use any reasonable averaging and attribution methods. Upon receipt of a
notice from a Revolving Lender under this section, the Borrower, upon ten (10)
days prior written notice to the Agent, may replace such Revolving Lender with a
new Revolving Lender that would not require a payment under this section, which
replacement Revolving Lender shall purchase the rights and assume the

                                       32

<PAGE>

obligations of the replaced Revolving Lender under this Agreement and the other
Operative Documents for a price equal to the outstanding principal and accrued
but unpaid interest on the Note issued to such replaced Revolving Lender, plus
the amount of other fees (including without limitation the commitment fee
payable in accordance with Section 2.2 (a) of this Agreement), such fees to be
pro rated through the purchase and assumption date; provided, however, that such
replacement Revolving Lender must be reasonably acceptable to the Agent.

         Each Revolving Lender shall promptly notify the Borrower and the Agent
of any event of which it has knowledge which will result in, and will use
reasonable commercial efforts available to it (and not, in such Revolving
Lender's reasonable judgment, otherwise disadvantageous to such Revolving
Lender) to mitigate or avoid, any obligation by the Borrower to pay any amount
pursuant to this Section 8.1 (and, if any Revolving Lender has given notice of
any such event and thereafter such event ceases to exist, such Revolving Lender
shall promptly so notify the Borrower and the Agent). Without limiting the
foregoing, each Revolving Lender will designate a different funding office if
such designation will avoid (or reduce the cost to the Borrower of) any event
described in the preceding sentence and such designation will not, in such
Revolving Lender's reasonable judgment, be otherwise disadvantageous to such
Revolving Lender.

         8.2      General Indemnity. The Borrower shall indemnify each Revolving
Lender and its directors, officers, employees and agents from and against any
and all losses, claims, liabilities, damages, reasonable and documented
attorneys' fees and disbursements, and other reasonable and documented costs and
expenses which the indemnified party may at any time sustain or incur in
connection with the Borrower's use of loan proceeds; provided that the
indemnified party shall not have any right to be indemnified for its own gross
negligence or willful misconduct. All indemnities and all provisions relative to
reimbursement to the Revolving Lenders of amounts sufficient to compensate the
Revolving Lenders for changes in capital adequacy requirements, including, but
not limited to, Section 8.1 hereof, shall survive the termination of this
Agreement and the payment of the Notes.

                                IX. MISCELLANEOUS

         9.1      Entire Agreement. This Agreement constitutes the entire
agreement between the parties hereto with respect to the subject matter hereof
and, except as specified by Section 7.1, may not be effectively amended,
changed, modified or altered, except in writing executed by the Borrower and the
Requisite Revolving Lenders.

         9.2      Governing Law. The Operative Documents shall be governed by
and construed pursuant to the laws of the State of Nebraska.

         9.3      Notices. Until changed by written notice from one party hereto
to the other, all communications under the Operative Documents shall be in
writing and shall be hand delivered or mailed by registered mail to the parties,
and shall be deemed given when mailed, as follows:

                                       33

<PAGE>

                  If to the Borrower:

                           AMERITRADE HOLDING CORPORATION
                           4211 South 102nd Street
                           Omaha, Nebraska 68127
                           Attention:  Mr. John R. MacDonald

                  If to the Guarantors:

                           AMERITRADE ONLINE HOLDINGS CORP.
                           4211 South 102nd Street
                           Omaha, Nebraska 68127
                           Attention:  Mr. John R. MacDonald

                           DATEK ONLINE HOLDINGS CORP.
                           4211 South 102nd Street
                           Omaha, Nebraska 68127
                           Attention:  Mr. John R. MacDonald

                  If to the Agent:

                           FIRST NATIONAL BANK OF OMAHA
                           1620 Dodge Street
                           Omaha, Nebraska  68197-1050
                           Attention:  Mr. Mark A. Baratta

                  If to the Revolving Lenders, at their respective addresses
listed herein.

         9.4      Headings. The captions and headings herein are for convenience
only and in no way define or limit the scope or intent of any provisions or
sections of this Agreement.

         9.5      Counterparts. This Agreement may be executed in several
counterparts and such counterparts together shall constitute one and the same
instrument.

         9.6      Survival; Successors and Assigns. The covenants, agreements,
representations and warranties made herein, and in the certificates delivered
pursuant hereto, shall survive the execution and delivery to the Revolving
Lenders of this Agreement and shall continue in full force and effect so long as
any Note or any obligation to the Revolving Lenders under any of the Operative
Documents (other than contingent obligations that, by their terms, survive the
termination hereof) is outstanding and unpaid or any Commitment remains in
effect. Whenever in this Agreement any of the parties hereto is referred to,
such reference shall be deemed to include the successors and assigns of such
party, and all covenants, promises and agreements by or on behalf of the
Borrower which are contained in this Agreement shall bind the successors and
assigns of the Borrower and shall inure to the benefit of the successors and
assigns of the Revolving Lenders.

                                       34

<PAGE>

         9.7      Severability. If any provision of this Agreement shall be
prohibited by or invalid under applicable law, such provision shall be
ineffective to the extent of such prohibition or invalidity without invalidating
the remainder of such provision or the remaining provisions of this Agreement.

         9.8      Assignment. The Borrower may not assign its rights or
obligations hereunder and any assignment in contravention of the terms hereof
shall be void.

         9.9      Consent to Form of Pledge Agreements and Security Agreements.
The parties hereto expressly approve the form of the Pledge Agreements and the
Security Agreements.

                                       35

<PAGE>

         IN WITNESS WHEREOF, the Borrower and the Revolving Lenders have caused
this Agreement to be executed by their duly authorized corporate officers as of
the day and year first above written.

                                    AMERITRADE HOLDING CORPORATION

                                    By:/s/ John R. MacDonald
                                       -----------------------------------------

                                    Title: EVP, CFO & Treasurer

                                    FIRST NATIONAL BANK OF OMAHA

                                    By:/s/ Mark A. Baratta
                                      ------------------------------------------

                                    Title: Vice President

NOTICE: A credit agreement must be in writing to be enforceable under Nebraska
law. To protect you and us from any misunderstandings or disappointments, any
contract, promise, undertaking, or offer to forebear repayment of money or to
make any other financial accommodation in connection with this loan of money or
grant or extension of credit, or any amendment of, cancellation of, waiver of,
or substitution for any or all of the terms or provisions of any instrument or
document executed in connection with this loan of money or grant or extension of
credit, must be in writing to be effective.

                              INITIALED:

                                /s/ JRM
                              ----------------
                              Borrower

                                       36

<PAGE>

                                               LASALLE BANK NATIONAL ASSOCIATION

                                               By:/s/ Lezlee Schutty
                                                  ------------------------------

                                               Title: Commercial Loan Officer

NOTICE: A credit agreement must be in writing to be enforceable under Nebraska
law. To protect you and us from any misunderstandings or disappointments, any
contract, promise, undertaking, or offer to forebear repayment of money or to
make any other financial accommodation in connection with this loan of money or
grant or extension of credit, or any amendment of, cancellation of, waiver of,
or substitution for any or all of the terms or provisions of any instrument or
document executed in connection with this loan of money or grant or extension of
credit, must be in writing to be effective.

                                            INITIALED:

                                            /s/JRM
                                            ------------
                                            Borrower

                                       37

<PAGE>

                                    M&I MARSHALL & ILSLEY BANK

                                    By:/s/ Mark P. Schaus
                                       -----------------------------------------

                                    Title: Vice President

NOTICE: A credit agreement must be in writing to be enforceable under Nebraska
law. To protect you and us from any misunderstandings or disappointments, any
contract, promise, undertaking, or offer to forebear repayment of money or to
make any other financial accommodation in connection with this loan of money or
grant or extension of credit, or any amendment of, cancellation of, waiver of,
or substitution for any or all of the terms or provisions of any instrument or
document executed in connection with this loan of money or grant or extension of
credit, must be in writing to be effective.

                            INITIALED:

                             /s/ JRM
                            -------------
                             Borrower

                                       38

<PAGE>

                                    WELLS FARGO BANK, NATIONAL ASSOCIATION

                                    By:/s/ Daniel A. Toll
                                       -----------------------------------------

                                    Title:  Vice President

NOTICE: A credit agreement must be in writing to be enforceable under Nebraska
law. To protect you and us from any misunderstandings or disappointments, any
contract, promise, undertaking, or offer to forebear repayment of money or to
make any other financial accommodation in connection with this loan of money or
grant or extension of credit, or any amendment of, cancellation of, waiver of,
or substitution for any or all of the terms or provisions of any instrument or
document executed in connection with this loan of money or grant or extension of
credit, must be in writing to be effective.

                                    INITIALED:

                                      /s/ JRM
                                    ---------------------------
                                    Borrower

                                       39

<PAGE>

                                   APPENDIX I

                          TO THIRD AMENDED AND RESTATED
                           REVOLVING CREDIT AGREEMENT
                                      AMONG
                         AMERITRADE HOLDING CORPORATION
                                       AND
                     FIRST NATIONAL BANK OF OMAHA, AS AGENT
                                       AND
                         REVOLVING LENDERS PARTY HERETO

                          REVOLVING CREDIT COMMITMENTS

                                       40

<PAGE>

                          REVOLVING CREDIT COMMITMENTS
                         AMERITRADE HOLDING CORPORATION

<TABLE>
<CAPTION>
                                       REVOLVING                 REVOLVING      CLOSING
LENDER                                COMMITMENT                COMMITMENT %    FEE(1):
------                                ----------                ------------     -----
<S>                                 <C>                         <C>             <C>
First National Bank
of Omaha                            $   25,000,000                    33.3%     $ 7,500

LaSalle Bank National
Association                         $   25,000,000                    33.3%     $ 7,500

M&I Bank Marshall &
Ilsley Bank                         $   15,000,000                      20%     $ 7,500

Wells Fargo Bank,
National Association                $   10,000,000                    13.3%     $15,000

TOTAL REVOLVING                     --------------
CREDIT COMMITMENT                   $75,000,000.00
</TABLE>

Dated as of December 15, 2003.

(1) Closing fees will be equal to .0015 (15 bps) times the size of the increase
in the respective Commitment as shown below:

<TABLE>
<CAPTION>
Commitment Amount Increase              Closing Fee
--------------------------              -----------
<S>                                     <C>
    $ 5,000,000.00                       $ 7,500.00

    $10,000,000.00                       $15,000.00
</TABLE>

                                       41

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