Document:

<PAGE>

                                                                   Exhibit 10.24

                          OPTION TO PURCHASE AGREEMENT
                            (UNPATENTED MINING CLAIM)
                            WILDCAT PROJECT, NEVADA

    This Option to Purchase Agreement (hereinafter "Agreement") is made and
entered into effective as of October 12, 2003, by and between David C. Mough
and Jody Ahlquist Mough (hereinafter "Owner"), whose address is P.O. Box
1937, Nevada City, California 95959 and Vista Nevada Corp., a Nevada
corporation (hereinafter "Vista"),  whose address is 7961 Shaffer Parkway,
Suite 5, Littleton, Colorado 80127.

                                    RECITALS
                                    --------

    Owner represents that it is the owner and is in possession of that
certain unpatented mining claim situated in Pershing County, Nevada, which is
more particularly described in Exhibit "A" attached hereto and made a part
hereof, together with all ore, minerals, and mineral substances of every nature
and character, whatsoever, and together with all dips, spurs, extralateral
rights, dumps, tailings, severed ore thereon, and any easements, rights-of-way,
water rights, structures, improvements, and fixtures appurtenant thereto,
(hereinafter "Premises"), and all rights hereafter acquired by Owner to the
Premises.

    Vista desires to obtain and Owner is willing to grant an exclusive
option to purchase the Premises to Vista, together with certain rights of access
to the Premises during the term of this Agreement as hereinafter set forth.

    NOW, THEREFORE, in consideration of Ten Dollars ($10.00) and other
good and valuable consideration paid to Owner, the receipt and sufficiency of
which are hereby acknowledged, and further in consideration of the mutual
covenants, agreements, and promises herein contained, the parties hereto agree
as follows:

1.0  GRANT OF RIGHTS AND OPTION.

(a)  Owner hereby grants to Vista free and unrestricted access to the Premises,
the exclusive option to purchase the Premises, and the exclusive right (i) to
explore, sample, and test the Premises, (ii) to erect, construct, use, and
maintain on the Premises such roads, structures, machinery, equipment, personal
property, fixtures, and improvements as may be required for the conduct of its
exploration and related operations, and (iii) to extract and remove from the
Premises such ore, minerals, or mineral substances as may be removed in the
normal course of exploration operations and such materials as Vista may require
for bulk sampling and testing. Vista shall not conduct commercial mining
operations on the Premises or sell any ore, minerals, or other products from the
Premises before exercising the Option to Purchase as provided for in this
Agreement.

(b)  To exercise all other rights which are incidental to any and all of the
rights referred to herein; and

(c)  To use the Premises for all of the purposes stated in this Section in
conjunction with

<PAGE>

Vista's activities on other properties.

2.0  TERM.

     2.1  TERM OF AGREEMENT. This Agreement is granted for a term of one (1)
year from the date hereof and, provided that Vista exercises its Option to
Purchase before the end of the one year term, for an additional period for the
Closing provided for in Section 4.3 to occur.

3.0  OPTION PAYMENTS.

(a)  Vista shall pay to Owner option payments (hereinafter "Option Payments") on
the dates and in the amounts as follows:

     Amounts           Due Dates
     -------           ----------
     $ 50,000          Upon the execution of this Agreement
     $ 50,000          On or before the first anniversary date of this Agreement

    If this Agreement is terminated, Vista shall have no obligation to make
any of the payments described above, the due dates of which occur after the
date of such termination.

    These payments shall be in lieu of any obligation on the part of Vista
express or implied, to explore the Premises or perform any work thereon except
as may otherwise be expressly provided for in this Agreement.

(b)  CREDIT/OFFSET. All Option Payments paid to Owner shall be a credit against
the Purchase Price as provided in Section 4.1.

    3.1  PAYMENT METHOD. All payments due to the Owner shall be paid by
check or wire transfer. All payments shall be made to the Owner at the address
specified in Section 10.3 (NOTICES). Owner may designate a different receiving
address or account consistent with the terms of Section 10.3.

4.0  PURCHASE OPTION. Owner hereby grants to Vista the exclusive right and
option to purchase all of the Premises from Owner at anytime during the term
of this Agreement. Vista shall be required to exercise its option to purchase
all of the Premises before the commencement of construction of any permanent
facilities for mining or processing ore minerals, and mineral substances on
the Premises or the commencement of any actual mining operations on the
Premises for the purpose of beginning commercial production of minerals from
the Premises.

    4.1  PURCHASE PRICE. The Purchase Price for all of the Premises,
together with any and all easements, rights-of-way, water rights, structures,
improvements and fixtures appurtenant thereto (hereinafter "Purchase Price")
shall be One Hundred Thousand Dollars ($100,000).

                                       2

<PAGE>

    4.2  EXERCISE OF PURCHASE OPTION. Vista may exercise the Purchase Option
at any time during the term of the Agreement. To exercise the Purchase
Option, Vista shall either (i) deliver written notice to Owner; or (ii) mail
written notice to Owner at the address specified in Section 10.3 (NOTICES).

    In the event Vista purchases the Premises, Vista shall pay the
Purchase Price to Owner and Owner shall execute and deliver the Mining Deed to
Vista as provided in Section 4.3. Thereafter, Vista shall own all of Owner's
right, title, and interest in and to the Premises.

    4.3  CLOSING. If Vista exercises the Option, the parties shall
diligently attempt to close the purchase and sale of the Property within thirty
(30) days following Vista's delivery of its notice of exercise. Owner shall
execute and deliver at the Closing a Mining Deed in form proper for recording
under Nevada law. The Mining Deed shall convey from Owner to Vista all of
Owner's right, title and interest in and to the Premises, together with all
dumps, tailings, extralateral rights, minerals (including severed ore), mineral
rights, water rights and all easements, fixtures, improvements, rights-of-way,
structures and water rights on, under or appurtenant to the Premises. The Mining
Deed shall include Owner's general warranty of title to Vista, subject to the
paramount title of the United States, to the unpatented mining claim, free and
clear of any and all liens, claims and encumbrances of every kind and nature. At
the Closing, Vista shall deliver the balance of the Purchase Price in
immediately available funds or by wire transfer to an account designated by
Owner. The parties shall execute and deliver such other written assurances as
are reasonably necessary to consummate the transactions contemplated under this
Agreement and to complete the Closing. Vista shall pay the real property
transfer taxes, recording fees and Bureau of Land Management notice of transfer
filing fees incurred on the recording of the Mining Deed and filing of the
notice of transfer with the Bureau of Land Management. The real property taxes,
if any, assessed against the Premises shall be prorated between Owner and Vista
as of the Closing Date. On completion of the Closing, Vista shall own all right,
title and interest in and to the Premises, subject only to the paramount title
of the United States.

    Closing shall be accomplished at a location mutually acceptable to
both parties within thirty (30) days of notice of exercise of the Purchase
Option ("Closing Date").

5.0  OWNER'S RIGHTS. COVENANTS. AND OBLIGATIONS.

    5.1  OWNER'S WARRANTIES. Owner covenants, warrants, and represents that
as of the effective date of this Agreement and as of the date of the Closing
provided for in Section 4.3, which covenants, warranties and representations
shall survive the Closing:

(a)  Owner owns the entire undivided title and interest in and to the Premises,
except for paramount title in the United States as to the unpatented mining
claim included in the Premises, that Owner is in possession of the Premises,
that Owner knows of no other person claiming any interest in the Premises or the
ground covered thereby, and that the Premises is free from all leases, liens,
encumbrances, and outstanding adverse claims and interests.

                                       3

<PAGE>

(b)  Vista, in its sole discretion, may take any action reasonably necessary,
including commencement of legal proceedings, to remove any clouds against or to
cure any defects in Owner's title to the Premises. Owner agrees to cooperate
with Vista if Vista undertakes any such action. Vista may recover from Owner any
payments otherwise due or paid to Owner for the reasonable costs and expenses,
including attorney's fees, which Vista incurs in any such action. Owner may take
curative steps, at its own expense, in lieu of Vista taking such curative
action.

(c)  Owner, to the best of its knowledge and belief, and except for existing
drill roads and drill sites on the Premises, is not aware of any reclamation
obligations from any past mineral exploration or development activities on or
with respect to the Premises that remain unfulfilled with any local, state or
federal agencies having jurisdiction over such activities and is not aware of
any environmental condition or contamination on or connected with the Premises
of any nature, including, but not limited to, contamination by any hazardous
substances  ("Hazardous  Substances")  as  defined  in the  Comprehensive
Environmental Response, Compensation and Liability Act, as amended, and as
defined in the Resource Conservation Recovery Act and in any other applicable
laws and regulations.

Except for existing drill roads and drill sites on the Premises, the liability
for which Vista hereby agrees to assume, Owner hereby indemnifies, defends, and
holds Vista harmless from and against any and all claims, liabilities, losses,
damages, costs and expenses, including but not limited to civil and criminal
fines, penalties and interest, Superfund liability,  clean-up costs, and
reasonable attorney, environmental consultant, engineering, and expert fees,
(collectively "Claims") arising out of or in connection with any reclamation
obligation or Hazardous  Substances or other environmental  condition or
contamination which exists on the Premises as of the effective date of this
Agreement, or which is due to any act or omission of Owner and/or any prior
occupants of the Premises.

(d)  The unpatented mining claim included in the Premises has been properly
located, and that for each assessment year either payment of annual maintenance
fees or rentals have been paid or assessment work has been performed to properly
maintain the unpatented mining claim in accordance with applicable state and
federal laws and regulations.

(e)  The location notices or location certificates for the unpatented mining
claim included in the Premises have been properly filed in the proper office of
the Bureau of Land Management in accordance with applicable Federal laws and
regulations; and

(f)  Evidence of assessment work, payment of maintenance fees or rentals or
notices of intention to hold have been properly recorded in the proper county,
or recording district office and filed in the proper office of the Bureau of
Land Management in accordance with applicable Federal laws and regulations for
each assessment year to and including the assessment year ending September 1,
2004.

(g)  Before the execution of this Agreement, Owner has made available to Vista
all drill core and/or drill cuttings and copies of all geological, geophysical,
and engineering data and maps, logs of drill holes, results of assaying and
sampling, and disclosed all additional data and information that Owner has
knowledge of which may impact Vista's rights and obligations under this
Agreement.

                                       4

<PAGE>

(h)  Owner's representations and warranties in Section 5.1, subsections (a),
(c), (d), (e) (f) and (g) shall survive Vista's exercise and Closing of the
Purchase Option.

    5.2  TITLE. Upon request by Vista, Owner shall provide Vista with
recording data with respect to location notices and certificates, affidavits of
annual labor, deeds, easements, or other documents which bear upon Owner's title
to the Premises, and shall provide Vista with copies of all such documents and
all title reports and abstracts in Owner's possession or control. Owner shall,
upon Vista's request, record any such document in Owner's possession or control
which has not been recorded.

    5.3  LESSER INTEREST. Without impairment of the covenants and
warranties of title contained in this Agreement, if Owner owns less than the
entire undivided estate in the Premises, all Agreement payments and the Purchase
Price shall be proportionately reduced and all payments due under this Agreement
shall be payable to Owner only in the proportion that Owner's actual ownership
interest in the Premises bears to the whole and undivided estate.

    5.4  INSPECTION.

(a)  Owner and its agents, employees, or personal representatives, duly
authorized in writing, may inspect the activities of Vista on the Premises
during normal business hours, provided, however, that (i) such inspection shall
be made upon no less than twenty-four (24) hours prior notice given to Vista,
and (ii) such inspection shall be subject to the safety requirements of Vista.

(b)  Owner, in the exercise of this right, shall hold Vista harmless from all
claims for damages arising out of any death, personal injury, or property damage
sustained by Owner, its agents, employees, or personal representatives while in
or upon the Premises, unless such death or injury arises as a direct result of
the negligence or willful misconduct of Vista.

    5.5  AREA OF INTEREST. Should Owner acquire any right or interest in
any patented or unpatented mining claims or mill sites or in any other real
property within 1.5 miles of the exterior boundaries of the Premises (the "Area
of Interest") within five (5) years following the date of the Closing provided
for in this Agreement, Owner shall promptly notify Vista in writing of the
acquisition. At Vista's sole election by notice in writing to Owner, such right
or interest shall become the property of Vista and Owner hereby agrees to sign,
acknowledge, and deliver to Vista a conveyance or an assignment of such property
right or interest, as appropriate. Owner hereby acknowledges and agrees that the
consideration paid by Vista pursuant to this Agreement constitutes full
consideration for any additional property rights or interests within the Area of
Interest to be conveyed to Vista under this provision. This Section 5.5 shall
survive the Closing of the transaction contemplated by this Agreement.

                                       5

<PAGE>

6.0  VISTA'S COVENANTS AND OBLIGATIONS.

    6.1  EXPLORATION ACTIVITIES.

(a)  Vista shall conduct all exploration and related activities on the Premises
in a good and workmanlike manner and in accordance with accepted industry
practices. All decisions with respect to the exploration of the Premises shall
be made by Vista in its sole discretion.

(b)  Vista shall comply with all valid state, federal, state and local laws and
regulations governing its activities on the Premises. If this Agreement is
inconsistent with or contrary to any law or regulation, the law or regulation
shall control and this Agreement shall be deemed to be modified accordingly.

(c)  Except as provided for in Section 5.4 (INSPECTION), Vista shall hold Owner
harmless for all claims, loss, liability, liens or expense of any kind arising
from or related to its activities on the Premises, excepting therefrom such
claims or liability caused by the negligence or willful misconduct of Owner, its
agents or employees. Vista agrees to indemnify Owner against any such claims or
liability, including all costs and reasonable attorney's fees incurred by Owner
in defending against such claim or liability.

    6.2  INSURANCE. Vista shall carry at all times during the term of this
Agreement, workmen's compensation and other insurance required by state laws and
mining regulations.

    6.3  REPORTS AND INFORMATION. During the term of this Agreement, Vista
shall provide to Owner,  annually,  copies of drill-hole location maps,
non-interpretive core analysis, drill hole logs, assay results and other factual
reports from Vista's work on the Premises during the preceding year. Vista makes
no representation or warranty as to the accuracy or completeness of any such
data or information, and shall not be liable on account of any use by Owner or
any other person of any such data or information. Vista shall not be responsible
for the loss or destruction of any drill core. If Vista terminates this
Agreement without exercising its Purchase Option, Vista shall provide Owner with
all of the information previously obtained by Vista from Owner and with the
above-listed data or information pertaining to the Premises that was generated
by Vista, and not already provided to Owner, within thirty (30) days after
termination.

    6.4  CONFIDENTIALITY. Owner agrees to maintain all data, drill logs,
assays, samples, reports, records, and other information and data relating to
the Premises or Vista's operation on the Premises in strict confidence,
including, without limitation, information obtained by the Owner through
exercise of its inspection rights under Section 5.4 above during the term of
this Agreement and thereafter if Vista exercises the Purchase Option pursuant to
Section 4.2. Owner shall not disclose any such information to any person without
the prior written consent of Vista. Information and data developed by Vista
during the term of this Agreement is the property of Vista and, except as
specifically provided in this Agreement, shall not be available to the Owner.
Vista shall be entitled to injunctive relief to enforce its rights under this
Section 6.4.

                                       6

<PAGE>

    6.5  RECLAMATION. Vista shall comply with all local, state and federal
laws and regulations relating to land reclamation. Should Vista terminate this
Agreement before exercising its Option to Purchase, Vista agrees to reclaim
surface disturbances resulting from its exploration activities on the Premises
to conditions that are reasonably comparable to the conditions existing on the
effective date of this Agreement and in accordance with all applicable local,
state and federal laws and regulations.

Vista shall be permitted to store, handle and dispose of substances on the
Premises which may be regulated or defined as hazardous substances ("Hazardous
Substances")  as defined  in the  Comprehensive  Environmental  Response,
Compensation and Liability Act, as amended, and as defined in the Resource
Conservation Recovery Act and in any other applicable laws and regulations as
long as Vista does so in compliance with the applicable laws and regulations.
Vista represents and warrants that Vista shall at all times during the term of
this Agreement be in compliance with all such laws and regulations and shall
indemnify, defend and hold Owner harmless from and against any and all claims,
liabilities, losses, damages, costs and expenses, including but not limited to
civil and criminal fines, penalties and interest, Superfund liability, clean-up
costs, and reasonable attorney, environmental consultant, engineering, and
expert fees, arising out of or in connection with any Hazardous Substances or
other environmental condition or contamination caused by Vista in violation of
this Section. This Section 6.5 shall survive the termination of this Agreement.

    6.6  MAINTENANCE FEES AND ASSESSMENT WORK.

(a)  If Vista continues this Agreement beyond July 1, 2004, Vista shall pay any
maintenance fee, rental, holding fee or other payment required under the federal
mining laws to maintain the unpatented lode mining claim in the Premises. If any
such law permits the performance of assessment work or annual labor in lieu of
making all or a portion of any such payment, Vista shall determine whether to
make such payment, perform such work or labor, or both.

(b)  For each assessment year during the term of this Agreement in which Vista
pays a maintenance fee, rental, holding fee or other payment, or performs annual
labor or assessment work, it shall prepare and record in the County office where
the location notices or location certificates are recorded and in the proper
office of the Bureau of Land Management, an affidavit of payment of maintenance
fees, rentals, holding fees or assessment work or other document complying with
the requirements of state law and the Federal Land Policy and Management Act of
1976 and the regulations implementing and supplementing the Act.

(c)  Vista shall have the benefit of all laws now existing or subsequently
enacted which relate to such work or fees, including any laws extending the time
within which to perform such work or to pay such fees, suspending such
requirements, or exempting the unpatented mining claim in the Premises from such
requirements. Vista shall be relieved of its obligation to perform such work or
make such payments for any period in which such work or such payments are not
required or are suspended under the federal mining laws.

    6.7  AMENDMENTS. RELOCATIONS. AND PATENTS. During the term of this
Agreement, Vista shall have the right, but not the obligation, to amend or
relocate, in the name of

                                       7

<PAGE>

Owner, the unpatented mining claim included in the Premises, to locate mill
sites on ground theretofore covered by the mining claim and vice versa, and
to locate any fractions resulting from the location, amendment, or relocation
of mining claims or mill sites. At the request of Vista, Owner shall apply
for a patent for the unpatented mining claim. All expenses authorized by
Vista in connection with locating,  amending, or relocating the mining claim
or mill sites, or prosecuting patent proceedings shall be borne by Vista. The
rights of Vista under this Agreement shall extend to all such locations,
amended locations, relocations, and patented mining claims and mill sites.

7.0  TERMINATION. SURRENDER. AND DEFAULT.

    7.1  DEFAULT. Should Vista fail to comply with any of the provisions of
the Agreement, and should Vista not initiate and diligently pursue steps to
correct the default within thirty (30) days after written notice has been given
to it by Owner specifying with particularity the nature of the default, then
upon the expiration of the thirty (30) day period, all rights of Vista under
this Agreement, except as provided hereunder and in Section 7.4 (REMOVAL OF
PROPERTY), shall terminate, and all liabilities and obligations of Vista, except
those liabilities existing on the date of termination, shall terminate.

Should Vista, by notice given to Owner, dispute the existence of a default, then
this Agreement shall not terminate hereunder unless Vista does not initiate and
diligently pursue steps to correct the default within thirty (30) days after the
default has been determined by a final decision of arbitrators or a court of
competent jurisdiction.

    7.2  TERMINATION. Vista may, at any time, terminate this Agreement as
to all of the Premises by delivering to Owner or by filing for record in the
appropriate office, with a copy to Owner, a good and sufficient Surrender of
this Agreement. Upon mailing the Surrender to Owner or the appropriate County
recording office, all rights of Vista under this Agreement with respect to the
Premises, except as provided in Section 7.4 (REMOVAL OF PROPERTY), shall
terminate and all liabilities and obligations of Vista with respect to the
Premises,  shall terminate on the date specified in the notice (except
liabilities existing on the date of termination). Upon such termination by
Vista, Vista shall also execute and deliver a Quitclaim Deed to Owner conveying
the mining claim covered by this Agreement.

    7.3  RIGHTS NOT TO BE SUSPENDED. Any dispute between the parties or
resolution thereof relating to this Agreement shall not interfere with nor
affect any right Vista may have under this Agreement.

    7.4  REMOVAL OF PROPERTY. For a period of six (6) months following the
termination of this Agreement, Vista shall have the right to remove from the
Premises all structures, machinery, equipment, personal property, fixtures, and
improvements owned by Vista or erected or placed on the Premises by Vista. Vista
may keep one or more watchmen on the Premises during the six-month period.

8.0  RIGHT OF FIRST OFFER. If Owner desires to transfer all or any part of its
interest in this Agreement or in the Premises to any third party, Vista shall
have the right of first offer to

                                       8

<PAGE>

acquire such interest as provided for in this Section 8.0.

(a)  If Owner intends to transfer all or any part of its interest in this
Agreement or in the Premises, Owner shall promptly notify Vista of its
intentions. The notice shall state the price and all other pertinent terms and
conditions of the intended transfer, which shall be for a monetary consideration
only. Vista shall have sixty (60) days from the date such notice is delivered to
notify Owner whether it elects to acquire the offered interest at the same price
and on the same terms and conditions as set forth in the notice. If Vista does
so elect, the transfer shall be consummated promptly after notice of such
election is delivered to the Owner.

(b)  If Vista fails to so elect within the period provided for in Section
8.0(a), Owner shall have one hundred eighty (180) days following the
expiration of such period to consummate the transfer to a third party at a
price and on terms no less favorable to the Owner than those set forth in the
notice required in Section 8.0(a) above. If Owner consummates the transfer to
a third party, Owner will promptly notify Vista in writing of the transfer
and will provide Vista with documentation of the terms of the transfer.

(c)  If Owner fails to consummate the transfer to a third party within the
period set forth in Section 8.0(b), Vista' right of first offer shall be
deemed to be revived. Any subsequent proposal to transfer such interest shall
be conducted in accordance with all of the procedures set forth in this
Section 8.0. This right of first offer shall be binding upon any successors
or assigns of Owner and upon any subsequent transfers by Owner or Owner's
successors or assigns.

9.0  ASSIGNMENT/MULTIPLE PARTIES.

(a)  Vista and Owner may assign all or any portion of their rights under this
Agreement, subject to the provisions set forth below.

(b)  Owner's right to assign any interest under this Agreement shall be subject
to Vista's right of first offer as set forth in Section 8.0.

(c)  No change or division of the ownership of the Premises or the payments
provided for herein, however accomplished, shall enlarge the obligations nor
diminish the rights of Vista. Owner covenants that any change in ownership shall
be accomplished in such a manner that Vista shall be required to make payments
and to give notices to but one person, firm, or corporation. No change or
division in ownership shall be binding on Vista until thirty (30) days after
Owner has delivered Vista a certified copy of the recorded instrument evidencing
the change or division.

(d)  Should Owner's interest in the Premises or payments now or hereafter be
owned by more than one party, Vista may withhold payments until all such owners
have designated a single party to act for all of them hereunder in all respects.

                                       9

<PAGE>

10.0  GENERAL PROVISIONS.

    10.1  MEMORANDUM. Vista and Owner agree to enter into a Memorandum of
this Agreement for the sole purpose of giving notice of the existence of this
Agreement and of Vista's rights of access and its permitted activities on the
Premises hereunder. Vista may record the Memorandum or this Agreement, or both,
as it may elect.

    10.2  ADDITIONAL DOCUMENTS. Owner shall provide Vista with such
additional title documents as may be necessary to carry out the purposes of this
Agreement. If conditions change by reason of conveyances, assignments, or other
matters relating to the title or description of the Premises, Owner and Vista
shall execute amendments to this Agreement and the Memorandum, and any other
documents  which may be necessary or convenient to reflect the changed
conditions.

    10.3  NOTICES. Any payment or notice required or desired to be given under
this Agreement shall be effective when personally served upon the party to be
given such payment or notice at the address designated below when deposited
in the United States mail, certified return requested, or registered with
postage thereon fully paid, when deposited with an express courier, or
transmitted by telecopier, telex, or other electronic means of written
communication. Until notified otherwise in writing, the addresses for such
notices shall be as follows:

          If to Owner:     David C. Mough and Jody Alquist Mough
                           P.O. Box 1937
                           Nevada City, CA 95959
                           Fax: ________________

          If to Vista:     Vista Nevada Corp.
                           Attention: President
                           7961 Shaffer Parkway, Suite 5
                           Littleton, CO 80127
                           Fax: 720-981-1186

    No change in address shall be binding on the other party until thirty
(30) days after notice is communicated in the above manner. Routine or regular
periodical reports and statements hereunder may be sent by regular mail so
addressed.

    10.4  SEVERABILITY.  Should any court or administrative body of competent
jurisdiction determine that any part, term, or provision of this Agreement is
unenforceable, illegal, or in conflict with any state, federal, or local law,
then, such part, term, or provision shall be considered severable from the
rest of the Agreement, and the remaining provisions of the Agreement shall
not be thereby affected, and this Agreement shall be construed and enforced
as if the Agreement did not contain such part, term, or provision.

    10.5  SOLE AGREEMENT. This Agreement, together with its exhibits,
contains the

                                       10

<PAGE>

entire agreement by and between Owner and Vista and no oral agreement,
promise, statement, or representation which is not contained herein shall be
binding on the parties. This Agreement shall not be modified or amended
except by a writing signed by the parties hereto.

    10.6  BINDING EFFECT. CONSTRUCTION. AND ENFORCEMENT. All covenants,
conditions, and terms of this Agreement shall be of benefit to and run with the
Premises and shall bind and inure to the benefit of the parties hereto, their
respective successors and assigns. This Agreement shall be construed and
enforced in accordance with the laws of the State of Nevada.

    10.7  TITLES. The titles to the respective sections hereof shall not be
deemed a part of this Agreement but shall be regarded as having been used for
convenience only.

    10.8  RELATIONSHIP. Nothing contained in this Agreement shall be
construed or deemed to create or constitute a joint venture, mining partnership,
commercial partnership, or other partnership in relation.

    10.9  COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original. If any person
named as Owner does not execute this Agreement, it shall nevertheless be binding
upon those persons executing it.

    IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first above written.

OWNER:                                VISTA:
                                      Vista Nevada Corp, a Nevada corporation

/s/ David C. Mough                    By: /s/ Ronald J. McGregor
-----------------------------             ----------------------------------
David C. Mough                            Ronald J. McGregor, President

/s/ Jody Ahlquist Mough
-----------------------------
Jody Ahlquist Mough

                                       11

<PAGE>

STATE OF CALIFORNIA     )
                        ss.
COUNTY OF _____________ )

    This Option to Purchase Agreement was acknowledged before me this _____
day of October, 2003, by David C. Mough and Jody Ahlquist Mough.

                               _____________________________________
                               Notary Public

                               My Commission Expires:_______________

STATE OF COLORADO     )
                      ss.
COUNTY OF JEFFERSON   )

    This Option to Purchase Agreement was acknowledged before me on this
_____ day of October 2003, by Ronald J. McGregor as President of Vista Nevada
Corp.

                               _____________________________________
                               Notary Public

                               My Commission Expires:_______________

<PAGE>

                                     EXHIBIT A
                                         TO
                           OPTION TO PURCHASE AGREEMENT
                                      BETWEEN
                      DAVID C. MOUGH AND JODY AHLQUIST MOUGH
                                        AND
                                 VISTA NEVADA CORP.

                              DESCRIPTION OF PREMISES

The following described unpatented lode mining claim is located in Section
17, Township 31 North, Range 29 East, Mount Diablo Base and Meridian, in
Pershing County, Nevada:

     CLAIM NAME                             BLM SERIAL NO.
     ----------                             --------------
     Vernal                                 NMC 829847QuickLinks
 -- Click here to rapidly navigate through this document

Exhibit 10.1  

 
 

COGENT COMMUNICATIONS GROUP, INC.    
    
    THIRD AMENDED AND RESTATED
  STOCKHOLDERS AGREEMENT  
    

        THIS STOCKHOLDERS AGREEMENT (this "Agreement") is made as of the 30th day of March, 2004 by and among (i) Cogent
Communications Group, Inc., a Delaware corporation (the "Company"), (ii) David Schaeffer (the "Founder") and (iii) those
persons whose names are set forth under the heading "Purchasers" on Schedule I hereto and any person who later becomes a party to this Agreement by executing and delivering to the Company an
Instrument of Accession in the form of Schedule II hereto (the "Purchasers"). 

WITNESSETH: 

        WHEREAS,
simultaneously herewith, the Company and certain of the Purchasers (the "Series I Purchasers" and the "Series J
Purchasers") have consummated the following transactions in contemplation of their respective merger agreements (collectively, the "Merger Agreements"):
(i) pursuant to the merger agreement between the Company, the Company's subsidiary Lux Merger Sub, Inc. ("Lux Merger Sub") and Symposium Gamma, Inc.
("Symposium Gamma"), dated January 5, 2004 (the "Gamma Merger Agreement"), whereby the Series I Purchasers, subject to the terms
and conditions set forth therein, received 2,575 shares of the Company's Series I Participating Convertible Preferred Stock, par value $.001 per share ("Series I Preferred
Stock"), and (ii) pursuant to the merger agreement between the Company, the Company's subsidiary DE Merger Sub Inc. ("DE Merger Sub") and
Symposium Omega, Inc. ("Symposium Omega"), dated March 30, 2004 (the "Omega Merger Agreement"), whereby the Series J
Purchasers, subject to the terms and conditions set forth therein, received 3,891 shares of the Company's Series J Participating Convertible Preferred Stock, par value $.001 per share
("Series J Preferred Stock"); 

        WHEREAS,
the Founder and certain of the Purchasers who purchased the Series F Participating Convertible Preferred Stock, par value $.001 per share ("Series F
Preferred Stock"), of the Company, and the various sub-series of Series G Participating Convertible Preferred Stock, par
value $.001 per share (collectively, the "Series G Preferred Stock"), of the Company (collectively, the Series F and Series G Preferred Stock shall be
known as the "Preferred Stock"), are parties to that certain Second Amended and Restated Stockholders Agreement, dated as of July 31, 2003 (the
"Second A&R Stockholders Agreement"), and in connection with the consummation of the transactions contemplated by the Merger Agreements, the Company, the Founder and such
Purchasers, constituting signatories sufficient under Section 15 of the Second A&R Stockholders Agreement to amend the Second A&R Stockholders Agreement, desire to amend and restate the Second
A&R Stockholders Agreement as set forth herein and execute and deliver this Agreement, setting forth herein certain terms and conditions governing their relative ownership of the Shares (as
hereinafter defined); 

        NOW
THEREFORE, in consideration of the mutual covenants herein contained and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the
Company, the Founder and the Purchasers hereby agree as follows: 

        1.    Prohibited Transfers.    The Founder shall not sell, assign, transfer, pledge,
hypothecate, mortgage or dispose of, by gift or otherwise, or in any way encumber, all or any part of the Shares (as hereinafter defined) owned by him except in compliance with the terms of this
Agreement. For purposes of this Agreement, the term "Shares" shall mean and include all shares of Common Stock of the Company and all shares of any class or series of
equity securities or equity-backed securities of the Company or any subsidiary, including without limitation, capital stock (including any shares of treasury stock) or rights, options, warrants or
other securities convertible into or exercisable or exchangeable for capital stock or any debt security which by its terms is convertible into or exchangeable for any equity 

 

security
or has any other equity feature or any security that is a combination of debt and, in any event that is owned by the Founder, whether presently held or hereafter acquired. 

        2.    Purchasers' Right of Refusal on Dispositions made by the Founder.    Except as set
forth in Section 4, if the Founder wishes to sell, assign, transfer or otherwise dispose of any or all Shares owned by him pursuant to the terms of a bona fide offer received from a third party
at any time prior to the consummation of a firmly underwritten public offering pursuant to an effective registration statement under the Securities Act of 1933, as amended, covering the offer and sale
of Common Stock of the Company in which (a) the pre-money valuation of the Company is at least $500,000,000 and (b) the gross cash proceeds (before underwriting discounts,
commissions and fees) are at least $50,000,000 (a "Qualified Offering"), the Founder shall submit a written offer to sell such Shares to the Purchasers (with a copy to the
Company) on terms and conditions, including price, not less favorable to the Purchasers than those on which the Founder proposes to sell such Shares to such third party (the
"Offer"). The Offer shall disclose the identity of the proposed purchaser or transferee, the Shares proposed to be sold or transferred, the agreed terms of the sale or
transfer and any other material facts relating to the sale or transfer. Within thirty (30) days after receipt of the Offer, each Purchaser and
each Qualified Transferee, if any, shall give notice to the Founder of its intent to purchase all or any portion of the offered Shares on the same terms and conditions as set forth in the Offer. Each
Purchaser and Qualified Transferee shall have the right to purchase that number of the Shares as to which the Offer applies as shall be equal to the aggregate number of such Shares multiplied by a
fraction, the numerator of which is the number of shares of Common Stock of the Company then owned by such Purchaser or Qualified Transferee (as applicable) (calculated on an as converted basis, and
including any shares of Common Stock deemed to be beneficially owned by such Purchaser pursuant to Rule 13d-3 promulgated under the Securities Exchange Act of 1934
("Rule 13d-3")) and the denominator of which is the aggregate number of shares of said Common Stock then issued and outstanding and held by (and deemed
to be beneficially owned by) all the Purchasers (calculated on an as converted basis). The amount of Shares each Purchaser or Qualified Transferee, as that term is defined below, is entitled to
purchase under this Section 2 shall be referred to as such Purchaser's "Pro Rata Fraction." Each Purchaser shall have the right to transfer his right to any Pro
Rata Fraction or part thereof to any Qualified Transferee. If any Purchaser or Qualified Transferee does not wish to purchase or to transfer his right to purchase his Pro Rata Fraction (such shares,
the "Remaining Offered Shares"), then any Purchasers or Qualified Transferees who so elect shall have the right to purchase, on a pro rata basis with any other Purchasers
or Qualified Transferees who so elect, any Pro Rata Fraction not purchased by a Purchaser or Qualified Transferee. Each Purchaser or Qualified Transferee shall act upon the Offer as soon as
practicable after receipt from the Company of notice that a Purchaser or Qualified Transferee has not elected to purchase all of the offered Shares, and in all events within fifteen (15) days
after receipt thereof. Each Purchaser and Qualified Transferee shall have the right to accept the Offer as to all or part of the Remaining Offered Shares offered thereby. If a Purchaser or Qualified
Transferee shall elect to purchase all or part of such Purchaser's or Qualified Transferee's Pro Rata Fraction, said Purchaser or Qualified Transferee shall individually communicate in writing such
election to purchase to whichever of the Purchasers has made the Offer, which communication shall be delivered by hand or delivered to such Purchaser at the address set forth in Section 8 below
and shall, when taken in conjunction with the Offer be deemed to constitute a valid, legally binding and enforceable agreement for the sale and purchase of the Shares covered thereby. 

        If
the Purchasers, taken together, do not agree to purchase all of the Shares offered by the Founder pursuant to the Offer, and consummate such purchase within the later of
forty-five (45) days after receipt of the Offer and twenty (20) days after the Company shall have notified each Purchaser and Qualified Transferee of Remaining Offered
Shares, such Shares subject to the Offer as shall not have been purchased may be sold by the Founder at any time within 90 days after the expiration of the Offer, but subject to the provisions
of Section 3 below. Any such sale shall be at not less than the price and upon other terms and conditions, if any, not more favorable to the purchaser than those specified 

2

 

in
the Offer. Any Shares not sold within such 90-day period shall continue to be subject to the requirements of a prior offer and re-sale pursuant to this Section. 

        For
purposes hereof, a "Qualified Transferee" shall mean any person (i) who is a Purchaser, (ii) who is an "affiliated person" of a Purchaser,
as that term is defined in the Investment Company Act of 1940, (iii) who is a partner, member or stockholder of a Purchaser that is a partnership, limited liability company or corporation, as
applicable, and who is offered a pro rata right, based on his, her or its
interest in the Purchaser, to acquire the Shares offered by a Purchaser pursuant to this Section 2, or (iv) who acquires at least twenty five percent (25%) of the shares of Preferred
Stock issued by the Company to any Purchaser (as adjusted for stock splits, stock dividends, reclassifications, recapitalizations or other similar events). 

        3.    Purchasers' Right of Participation in Sales made by the Founder.    Except as set
forth in Section 4, if at any time the Founder wishes to sell, transfer or otherwise dispose of any Shares owned by him to any person (the "Acquiror") in a
transaction which is subject to the provisions of Section 2 hereof, and such sale, transfer or other disposition would, when combined with all prior sales, transfers and other dispositions by
the Founder, result in the transfer by the Founder of Shares representing more than twenty-five percent (25%) of the total number of shares held by the Founder (the
"Founder's Stock"), each Purchaser shall have the right to require, as a condition to such sale or disposition, that the Acquiror purchase from said Purchaser at the same
price per Share and on the same terms and conditions as involved in such sale or disposition by the Founder the same percentage of shares of Common Stock owned (and deemed to be beneficially owned
under Rule 13d-3) by such Purchaser as such sale or disposition represents with respect to the number of shares of Founder's Stock (calculated on an as converted, fully diluted
basis) owned by the Founder immediately prior to such sale. Each Purchaser wishing so to participate in any such sale or disposition shall notify the Founder of such intention as soon as practicable
after receipt of the Offer made pursuant to Section 2, and in all events within fifteen (15) days after receipt thereof. If a Purchaser shall elect to participate in such sale or
disposition, said Purchaser shall individually communicate such election to the Founder, which communication shall be delivered by hand or mailed to the Founder at the address set forth in
Section 8 below. The Founder and/or each participating Purchaser shall sell to the Acquiror all, or at the option of the Acquiror, any part of the Stock (as defined in Section 5 below)
proposed to be sold by them at not less than the price and upon other terms and conditions, if any, not more favorable to the Acquiror than those set forth in the Offer;
provided, however, that any purchase of less than all of such Stock by the Acquiror shall be made from the Founder and/or each participating
Purchaser based upon a fraction, the numerator of which is the number of shares of Stock of the Company then owned by the Founder or such participating Purchaser (including any shares of Common Stock
deemed to be owned under Rule 13d-3) and the denominator of which is the aggregate number of shares of Stock held by (and deemed to be held by) the Founder and all of the
participating Purchasers. The Founder shall use his commercially reasonable efforts to obtain the agreement of the Acquiror to the participation of the participating Purchasers in the contemplated
sale, and shall not sell any Stock to such Acquiror if such Acquiror declines to permit the participating Purchasers to participate pursuant to the terms of this Section 3. The provisions of
this Section 3 shall not apply to the sale of any Shares by the Founder (i) to a Purchaser pursuant to an Offer under Section 2 or (ii) made upon or after the occurrence of
a Qualified Offering, the sale of the Company or control thereof, whether by merger, sale, recapitalization or similar corporate event or the transfer of more than a majority of its capital stock
(calculated on an as converted, fully diluted basis) or assets, or the conversion into Common Stock of all then outstanding shares of Preferred Stock (each such event in this clause (ii), a
"Corporate Event"). 

        4.    Permitted Transfers.    Anything herein to the contrary notwithstanding, the
provisions of Sections 1, 2 and 3 shall not apply to: (a) any transfer of Shares by the Founder by gift or bequest or through inheritance to, or for the benefit of, any member or members of his
immediate family; (b) any 

3

 

transfer
of Shares by the Founder to a trust in respect of which he serves as trustee, provided that the trust instrument governing said trust shall provide that Founder, as trustee, shall retain sole
and exclusive control over the voting and disposition of said Shares until the termination of the applicable restrictions on transfer under this Agreement; (c) any sale of Common Stock in a
public offering pursuant to a registration statement filed by the Company with the Securities and Exchange Commission; (d) any repurchase of Shares from officers, employees, directors or
consultants of the Company which are subject to restrictive stock purchase agreements under which the Company has the option to repurchase such shares upon the occurrence of certain events, including
termination of employment; and (e) any pledge, hypothecation or other similar financing transaction in which the Founder continues to have the sole and exclusive authority and right to vote the
shares subject to such pledge, hypothecation or other financing transaction. In the event of any such transfer, other than pursuant to subsection (c) of this Section 4, the transferee of
the Shares shall hold the Shares so acquired with all the rights conferred by, and subject to all the restrictions imposed by, this Agreement on the party from whom the transferee received the Shares,
and as a condition to such transfer, each such transferee shall execute and deliver a written agreement agreeing to be bound by the provisions of this Agreement. 

        5.    Election of Directors; Issuance of Options; Protective Provisions.    

        (a)
Election of Directors.    Each of the parties hereto agrees to vote all of the Stock (as hereinafter defined and that entitles the holder
thereof to vote in the election of the Board of Directors) now owned or hereafter acquired by such party (and attend, in person or by proxy, all meetings of stockholders called for the purpose of
electing directors), and the Company agrees to take all actions (including, but not limited to the nomination of specified persons) to cause and maintain the election to the Board of Directors of the
Company, to the extent permitted pursuant to the Company's certificate of incorporation, of the following: 

        (i)
two (2) individuals designated by the Founder (the designees under this subsection shall initially be David Schaeffer and H. Helen Lee); 

        (ii)
two (2) individuals designated by the holders of a majority in interest of the Shares owned as of the date hereof by Jerusalem Venture Partners and certain of its affiliates
(the designees under this subsection shall initially be Erel Margalit and Michael Carus); 

        (iii)
one (1) individual designated by the holders of a majority in interest of the Shares owned as of the date hereof by Worldview Technology Partners and certain of its
affiliates (the designee under this subsection shall initially be Tim Weingarten); 

        (iv)
one (1) individual designated by the holders of a majority in interest of the Shares owned as of the date hereof by Oak Investment Partners and certain of its affiliates (the
designee under this subsection shall initially be Edward Glassmeyer); 

        (v)
one (1) individual designated by the holders of a majority in interest of the Shares owned as of the date hereof by Broadview Capital Partners and certain of its affiliates
(the designee under this subsection shall initially be Steven Brooks); and 

        (vi)
one (1) individual designated by BNP Europe Telecom & Media Fund II, LP and Natio vie Developpement 3, FCPR (the designee under this subsection shall initially be
Jean-Jacques Bertrand); and 

        (vii)
a three (3) member Compensation Committee, one of the members of which shall be nominated by the directors elected pursuant to subparagraph (i) above and who shall
not be the Founder and two of the members of which shall be nominated by the directors elected pursuant to subparagraphs (ii), (iii), (iv) and (v) above. 

4

 

        Each
of the parties further covenants and agrees to vote, to the extent possible, all Stock of the Company now owned or hereafter acquired by such party so that (i) the Company's
Board of Directors shall consist of nine (9) members, eight (8) of whom shall be nominated or designated as set forth above and the ninth of whom shall be an independent director
nominated by the Company's Board of Directors, (ii) the Compensation Committee thereof shall consist of three (3) members, each of whom shall be nominated as set forth above, and
(iii) the holders of the Series G Preferred Stock, the Series I Preferred Stock, the Series J Preferred Stock and the Founder's Stock shall be entitled, in the aggregate,
to have up to four persons as observers at each meeting of the Board of Directors and any committee (other than the Compensation Committee) thereof, provided that at least one of such observers shall
be selected by the holders of the Series I Preferred Stock and the Series J Preferred Stock. For the purposes of this Agreement, "Stock" shall mean and
include all Preferred Stock and Common Stock and all other securities of the Company which may be exchangeable for or issued in exchange for or in respect of shares of Common Stock (whether by way of
stock split, stock dividends, combination, reclassification, reorganization or any other means). 

        In
the absence of any designation from the persons or groups so designating directors as specified above, the director previously designated by them and then serving shall be reelected
if still eligible to serve as provided herein. 

        No
party hereto shall vote to remove any member of the Board of Directors or the Compensation Committee thereof designated in accordance with the aforesaid procedure unless the persons
or groups so designating directors as specified above so vote, and, if such persons or groups so vote then the non-designating party or parties shall likewise so vote. 

        Any
vacancy on the Board of Directors or the Compensation Committee thereof created by the resignation, removal, incapacity or death of any person designated under this Section 5
shall be filled by another person designated in a manner so as to preserve the constituency of the Board or such Committee as provided above. 

        (b)
Issuance of Options to Holders of Preferred Stock. From and after the date hereof, each of the parties hereto agrees that the Company shall not, and each
agrees to vote all of their Shares of the Company now owned or hereafter acquired by such party (and attend, in person or by proxy, all meetings of stockholders called for the purpose of electing
directors) to preclude the Company from issuing any options under the Company's stock option plans as in effect from time to time to any holder of Preferred Stock or any person employed by or
controlled by or under common control with any such holder or any affiliate thereof without first obtaining the unanimous approval of the Board of Directors of the Company. 

        (c)
Protective Provisions. For so long as at least 9,500 shares of Series G Preferred Stock, Series I Preferred Stock and Series J
Preferred Stock collectively remain outstanding, the affirmative vote or consent of the holders of two-thirds (2/3) of the issued and outstanding shares of Series G Preferred Stock,
Series I Preferred Stock and Series J Preferred Stock, voting together as a single class, shall be required to take any of the following actions (including by way of merger,
consolidation or otherwise): 

        (i)
designate, authorize, create, issue, sell, redeem or repurchase any class or series of equity securities or equity-backed securities of the Company or any subsidiary thereof,
including without limitation, capital stock (including any shares of treasury stock) or rights, options, warrants or other securities convertible into or exercisable or exchangeable for capital stock
or any debt security which by its terms is convertible into or exchangeable for any equity security or has any other equity feature or any security that is a combination of debt and equity
(collectively, "Equity Securities"), other than pursuant to (i) employee stock option and similar incentive plans approved by the Board of Directors,
(ii) the issuance of Common Stock upon the conversion of the 7.5% Convertible Subordinated Notes due 2007 of Allied Riser Communications Corporation (the "Notes")
in accordance with the terms thereof or the issuance of additional convertible debt or 

5

 

equity
as a paid-in-kind interest payment on the Notes in accordance with the terms thereof approved by the Board of Directors or (iii) a conversion or exchange right
set forth in Company's certificate of incorporation; 

        (ii)
except as otherwise expressly provided as of the date hereof in the Company's certificate of incorporation or in a certificate of designations thereto, declare or pay any dividends
or make any distributions of any kind with respect to any outstanding Equity Securities of the Company or any subsidiary thereof; 

        (iii)
approve the merger, consolidation, dissolution or liquidation of the Company or any subsidiary thereof, or any transaction having the same effect; 

        (iv)
increase or decrease the aggregate number of authorized shares of Common Stock or Preferred Stock of the Company; 

        (v)
sell all or substantially all of the assets of the Company and its subsidiaries taken as a whole, whether directly through a sale of the Company's interests in its subsidiaries or
other assets, or indirectly through a sale of the assets of its subsidiaries, in one transaction or any series of transactions, or approve any transaction or series of transactions having the same
effect; 

        (vi)
cause, directly or indirectly, a material change in the nature of the business or strategic direction of the Company and its subsidiaries, taken as a whole; 

        (vii)
approve the filing for bankruptcy of or any decision not to take action to prevent a filing for bankruptcy or not to oppose an involuntary filing for bankruptcy or other winding up
of the Company or any subsidiary thereof; 

        (viii)
approve the establishment and maintenance of an Executive Committee of the Board of Directors or increase or decrease the number of directors composing the Board of Directors; or 

        (ix)
amend, repeal or modify any provision of the Company's certificate of incorporation in a manner that adversely affects the rights, powers or preferences of the Preferred Stock. 

        6.    Right of Participation in Sales by the Company.    

        (a)
Right of Participation. Except as provided in Section 6(f) of this Agreement, the Company shall not issue, sell or exchange, agree or obligate
itself to issue, sell or exchange, or reserve or set aside for issuance, sale or exchange, any (i) shares of Common Stock, (ii) any other equity security of the Company, including
without limitation, shares of Preferred Stock, (iii) any debt security of the Company (other than debt with no equity feature) including without limitation, any debt security which by its terms
is convertible into or exchangeable for any equity security of the Company, (iv) any security of the Company that is a combination of debt and equity, or (v) any option, warrant or other
right to subscribe for, purchase or otherwise acquire any such equity security or any such debt security of the Company, unless in each case the Company shall have first offered to sell such
securities (the "Offered Securities") to the Purchasers who hold individually or together with their affiliates at least 2,500,000 Shares of the Common Stock on an as
converted basis then outstanding and, for so long as the Founder holds not less than fifty percent (50%) of the number of shares of Founder's Stock held by him on the date hereof (in both cases, as
adjusted for stock splits, stock dividends, reclassifications, recapitalizations or other similar events), the holders of the Founder's Stock (such Purchasers and, if applicable, the holders of the
Founder's Stock being referred to as the "Participating Stockholders") as follows: The Company shall offer to sell to each Participating Stockholder (a) that
portion of the Offered Securities as the number of shares of Common Stock (including all shares of capital stock convertible into Common Stock, on a fully-diluted basis) then held by such
Participating Stockholder, as the case may be, bears to the total number of shares of Common Stock (including all shares of capital stock convertible into Common Stock, on a fully-diluted basis) of
the Company then outstanding (the "Basic Amount," and the aggregate of the Basic Amounts of all Participating Stockholders being 

6

 

referred
to as the "Aggregate Basic Amount"), and (b) such additional portion of the Aggregate Basic Amount as such Participating Stockholder shall indicate it will
purchase should the other Participating Stockholders subscribe for less than their Basic Amounts (the "Undersubscription Amount"), at a price and on such other terms as
shall have been specified by the Company in writing delivered to such Participating Stockholder (the "Offer"), which Offer by its terms shall remain open and irrevocable
for a period of twenty (20) days from receipt of the offer. 

        (b)
Notice of Acceptance. Notice of each Participating Stockholder's intention to accept, in whole or in part, any Offer made pursuant to Section 6(a)
shall be evidenced by a writing signed by such Participating Stockholder and delivered to the Company prior to the end of the 20-day period of such offer, setting forth such of the
Participating Stockholder's Basic Amount as such
Participating Stockholder elects to purchase and, if such Participating Stockholder shall elect to purchase all of its Basic Amount, such Undersubscription Amount as such Participating Stockholder
shall elect to purchase (the "Notice of Acceptance"). If the Basic Amounts subscribed for by all Participating Stockholders are less than the total Aggregate Basic Amount,
then each Participating Stockholder who has set forth Undersubscription Amounts in its Notice of Acceptance shall be entitled to purchase, in addition to the Basic Amounts subscribed for, all
Undersubscription Amounts it has subscribed for; provided, however, that should the Undersubscription Amounts subscribed for exceed the
difference between the Aggregate Basic Amount and the Basic Amounts subscribed for (the "Available Undersubscription Amount"), each Participating Stockholder who has
subscribed for any Undersubscription Amount shall be entitled to purchase only that portion of the Available Undersubscription Amount as the Undersubscription Amount subscribed for by such
Participating Stockholder bears to the total Undersubscription Amounts subscribed for by all Participating Stockholders, subject to rounding by the Board of Directors to the extent it reasonably deems
necessary. 

        (c)    Conditions to Acceptances and Purchase.    

        (i)
Permitted Sales of Refused Securities. If Notices of Acceptance are not given by the Participating Stockholders in respect of all the Aggregate Basic
Amount, the Company shall have ninety (90) days from the expiration of the period set forth in Section 6(a) to close the sale of all or any part of such Aggregate Basic Amount as to
which a Notice of Acceptance has not been given by the Participating Stockholders (the "Refused Securities") to the person or persons specified in the Offer, but only for
cash and otherwise in all respects upon terms and conditions, including, without limitation, unit price and interest rates, which are no more favorable, in the aggregate, to such other person or
persons or less favorable to the Company than those set forth in the Offer. 

        (ii)
Reduction in Amount of Offered Securities. If the Company shall propose to sell less than all the Refused Securities (any such sale to be in the manner
and on the terms specified in Section 6(c)(i) above), then each Participating Stockholder may, at its sole option and in its sole discretion, reduce the number of, or other units of the
Offered Securities specified in its respective Notices of Acceptance to an amount which shall be not less than the amount of the Offered Securities which the Participating Stockholder elected to
purchase pursuant to Section 6(b) multiplied by a fraction, (A) the numerator of which shall be the amount of Offered Securities which the Company actually proposes to sell, and
(B) the denominator of which shall be the amount of all Offered Securities. In the event that any Participating Stockholder so elects to reduce the number or amount of Offered Securities
specified in its respective Notices of Acceptance, the Company may not sell or otherwise dispose of more than the reduced amount of the Offered Securities until such securities have again been offered
to the Participating Stockholders in accordance with Section 6(a). 

7

 

        (iii)
Closing. Upon the closing, which shall include full payment to the Company, of the sale to such other person or persons of all or less than all the
Refused Securities, the Participating Stockholders
shall purchase from the Company, and the Company shall sell to the Participating Stockholders, the number of Offered Securities specified in the Notices of Acceptance, as reduced pursuant to
Section 6(c)(ii) if the Participating Stockholders have so elected, upon the terms and conditions specified in the Offer. The purchase by the Participating Stockholders of any Offered
Securities is subject in all cases to the preparation, execution and delivery by the Company and the Participating Stockholders of a purchase agreement relating to such Offered Securities reasonably
satisfactory in form and substance to the Participating Stockholders and their respective counsel. 

        (d)
Further Sale. In each case, any Offered Securities not purchased by the Participating Stockholders or other person or persons in accordance with
Section 6(c) may not be sold or otherwise disposed of until they are again offered to the Participating Stockholders under the procedures specified in Sections 6(a), 6(b) and 6(c). 

        (e)
Termination of Right of Participation. The rights of the Participating Stockholders under this Section 6 shall terminate immediately prior to the
consummation of a Qualified Offering. In addition, the rights of holders of the Founder's Stock under this Section 6 shall terminate when the Founder owns less than 50% of the shares of
Founder's Stock held by the Founder on the date first above written (as adjusted for stock splits, stock dividends, reclassifications, recapitalizations or other similar events). Upon the termination
of the rights of an individual or entity pursuant to this subsection (e), such individual or entity shall no longer be deemed to be a "Participating Stockholder" under
this Section 6. 

        (f)
Exception. The rights of the Participating Stockholders under this Section 6 shall not apply to: 

        (i)
Common Stock issued as a stock dividend to holders of Common Stock or upon any subdivision or combination of shares of Common Stock, 

        (ii)
shares of any series of Preferred Stock issued as a dividend to holders of such series of Preferred Stock upon any subdivision or combination of shares of such series of Preferred
Stock, 

        (iii)
shares of Common Stock issued or issuable upon conversion of the Preferred Stock, 

        (iv)
up to 10,000 shares of Common Stock issued or issuable pursuant to options, warrants or other rights (as adjusted for any stock dividends, combinations, splits, recapitalizations
and the like) issued to employees, officers or directors of, or consultants or advisors to the Company or any subsidiary pursuant to stock purchase or stock option plans or other arrangements that are
approved by the Board of Directors, 

        (v)
up to 54,001 shares of Series H Preferred Stock issued to employees, officers or directors of, or consultants or advisors to the Company or any subsidiary pursuant to that
certain 2003 Incentive Award Plan of the Company, 

        (vi)
Common Stock issued pursuant to the acquisition of another corporation by the Company by merger (whereby the Company owns no less than 51% of the voting power of such corporation)
or purchase of substantially all of its stock or assets, if such acquisition is approved by a majority of the Directors nominated by the holders of the Preferred Stock in the manner set forth in
Section 5 hereof, 

        (vii)
Common Stock offered to the public pursuant to a registration statement filed under the Securities Act, 

        (viii)
Common Stock, or options or warrants to purchase Common Stock, issued to financial institutions or lessors in connection with commercial credit arrangements, equipment financings
or 

8

 

similar
transactions, as approved by the two-thirds (2/3rds) of the then sitting members of the Board of Directors, 

        (ix)
shares of Series F Preferred Stock issued pursuant to that certain Exchange Agreement by and among the Company, Cisco Systems Capital Corporation ("Cisco
Capital"), and the other parties thereto, dated June 26, 2003 (the "Exchange Agreement"), 

        (x)
shares of Series G Preferred Stock issued pursuant to that certain Participating Convertible Preferred Stock Purchase Agreement by and among the Company and the
Series G Preferred Stock Purchasers ("Series G Purchasers"), dated June 26, 2003 (the "Purchase Agreement"), 

        (xi)
shares of Series I Preferred Stock issued pursuant to that certain Gamma Merger Agreement, dated January 5, 2004, 

        (xii)
shares of Series J Preferred Stock issued pursuant to that certain Omega Merger Agreement, dated March 30, 2004, and 

        (xiii)
the issuance of Common Stock upon the conversion of the Notes or the issuance of additional convertible debt or equity as a paid-in-kind interest payment
the Notes approved by the Board of Directors. 

        (g)
Waiver. The rights of the Purchasers under this Section 6 may be waived in any instance, on behalf of all of the Purchasers, prospectively or
retroactively, by the written agreement of the holders of two-thirds in interest of the Preferred Stock owned beneficially or of record by the Purchasers. The rights of holders of the
Founder's Stock under this Section 6 may be waived in any instance, on behalf of all such holders, prospectively or retroactively, by the written agreement of the holders of a majority of the
Founder's Stock then outstanding. Upon waiver of the rights of the Purchasers or holders of Founder's Stock in accordance with this subsection (g) with respect to a particular issuance, sale or
exchange of Offered Securities, the Purchasers or such holder, as the case may be, shall be excluded from the definition of "Participating Stockholders" for purposes of
this Section 6 with respect to such issuance, sale or exchange. 

        7.    Termination.    This Agreement, and the respective rights and obligations of the
parties hereto, shall terminate upon the earliest to occur of the following: (i) the completion of a Qualified Offering, provided that the obligations of Section 9 shall survive such
termination; or (ii) the sale of the Company, whether by merger, sale, or transfer of more than ninety percent (90%) of its capital stock, or sale of substantially all of its assets. In
addition, any Purchaser or Qualified Transferee may elect to terminate its rights and obligations with respect to any or all of Sections 2, 3, 5 or 6 by providing written notice of such election to
the Company at any time. 

        8.    Notices.    All notices and other communications hereunder shall be in writing and
shall be deemed to have been given when delivered or mailed by first class, registered or certified mail (air mail if to or from outside the United States), return receipt requested, postage prepaid,
or by internationally, recognized overnight courier service (two business days after deposit with such overnight courier service in the case of deliveries to non-U.S. residents), if to
each Purchaser at his respective address set forth on Schedule I hereto or on the Instrument of Accession pursuant to which he became a party to this Agreement, and if to the Founder, at his
address set forth on Schedule I hereto or to such other address as the addressee shall have furnished to the other parties hereto in the manner prescribed by this Section 8. 

        9.    Lock-up Agreement.    Each of the Purchasers and holders of Founder's
Stock hereby agrees in connection with the Company's Qualified Offering, upon the request of the principal underwriter managing the Qualified Offering of the Company, not to sell publicly any Shares
now owned or hereafter acquired by him, her or it and subject to this Agreement (other than Shares being registered in such offering or any shares purchased in the open market after the Company's
initial public offering) 

9

 

without
the prior written consent of such underwriter for a period of time (not to exceed one hundred eighty (180) days) from the consummation of such Qualified Offering as the underwriter may
specify, in all events subject to the provisions of Section 13(f) of a certain Fourth Amended and Restated Registration Rights Agreement dated as of the date hereof. 

        10.    Failure to Deliver Shares.    If the Founder becomes obligated to sell any Shares
owned by, or held for the benefit of, such Purchaser to the Founder, another Purchaser or a Qualified Transferee under this Agreement and fails to deliver such shares in accordance with the terms of
this Agreement, the Founder or such Purchaser, as applicable, may, at his or its option, in addition to all other remedies it may have, send to the Company for the benefit of such selling Purchaser
the purchase price for such Shares as is herein specified. Thereupon, the Company upon written notice to said Purchaser, (a) shall cancel on its books the certificate(s) representing the Shares
to be sold and (b) shall issue, in lieu thereof, in the name of the Founder or such Purchaser, as applicable, a new certificate(s) representing such Shares, and thereupon all of said
Purchaser's rights in and to such shares shall terminate. The Company may exercise a similar remedy in enforcing its rights under Section 2. If the Founder transfers any shares to a Purchaser
in violation of this Agreement, the Company may, at the election of a majority of the disinterested members of the Board of Directors, cancel on the books of the Company any shares of capital stock
then held by the Founder, and compel the Founder to purchase from any transferee a number of shares of capital stock equal to the amount so transferred in violation of this Agreement. 

        11.    Specific Performance.    The rights of the parties under this Agreement are unique
and, accordingly, the parties shall, in addition to such other remedies as may be available to any of them at law or in equity, have the right to enforce their rights hereunder by actions for specific
performance to the extent permitted by law. 

        12.    Legend.    Until this Agreement terminates in full, the certificates representing
the Shares shall bear on their face a legend indicating the existence of the restrictions imposed hereby. After the Qualified Offering, the Company shall not issue or deliver to any transfer agent a
stop transfer notice with respect to any Shares, the transfer of which is permitted pursuant to Rule 144(k) and the Securities Act of 1933. 

        13.    Entire Agreement.    This Agreement (including any and all exhibits, schedules and
other instruments contemplated thereby) constitutes the entire agreement among the parties with respect to the subject
matter hereof and supersedes all prior agreements and understandings between them or any of them as to such subject matter. 

        14.    Waivers and Further Agreements.    Except as otherwise expressly set forth herein,
the rights of the Purchasers and holders of Founder's Stock under this Agreement may be waived by an instrument in writing executed and delivered by Purchasers holding at least two-thirds
in interest of the Common Stock (including shares of Common Stock into which any shares of Preferred Stock are convertible) then held or deemed to be held by all Purchasers and holders of Founder's
Stock; provided, however, that the rights set forth in Section 5 with respect to the designation of the Board of Directors of the
Company may not be waived without the prior written consent of the constituency affected by such waiver, which waiver shall be obtained in a manner consistent with, and shall require the same
percentages prescribed in, Section 5. Any waiver by any party of a breach of any provision of this Agreement shall not operate or be construed as a waiver of any subsequent breach of that
provision or of any other provision hereof. Each of the parties hereto agrees to execute all such further instruments and documents and to take all such further action as any other party may
reasonably require in order to effectuate the terms and purposes of this Agreement. Notwithstanding the foregoing, no waiver approved in accordance herewith shall be effective if and to the extent
that such waiver grants to any one or more Purchasers or holders of Founder's Stock any rights more favorable 

10

 

than
any rights granted to all other Purchasers and holders of Founder's Stock or otherwise treats any one or more of such parties differently than all other such parties. 

        15.    Amendments.    Except as otherwise expressly provided herein, this Agreement may
not be amended except by an instrument in writing executed by (i) holders of at least two-thirds in interest of the shares of Common Stock issued or issuable to the Purchasers
(including shares of Common Stock into which any shares of Preferred Stock are convertible) and (ii) the Company. Notwithstanding the foregoing, no amendment approved in accordance with this
Section 15 shall be effective if and to the extent that such amendment (i) creates any additional affirmative obligations to be complied with by any or all of the Purchasers and holders
of Founder's Stock unless approved by holders of all of the Preferred Stock then outstanding and/or (ii) adversely affects any of the Founder's rights existing under this Agreement prior to
such amendment in a manner that is inconsistent with, or disproportionate to, the effect of such amendment on the other parties hereto. In addition, the rights set forth in Section 5 with
respect to the designation of the Board of Directors of the Company may not be amended without the prior written consent of the constituency affected by such amendment, which consent shall be obtained
in a manner consistent with Section 5. 

        16.    Assignment; Successors and Assigns.    This Agreement shall be binding upon and
shall inure to the benefit of the parties hereto and their respective heirs, executors, legal representatives, successors and permitted transferees, except as may be expressly provided otherwise
herein, and provided, further, that no Purchaser may transfer its rights or obligations hereunder except to a Qualified Transferee.
Notwithstanding anything contained herein to the contrary, until the first to occur of (i) termination of this Agreement and (ii) a Qualified Offering, any transferee of Preferred Stock
shall, as a condition to such transfer, deliver to the Company a written instrument by which such transferee agrees to be bound
by the obligations imposed hereunder on holders of Preferred Stock to the same extent as if such transferee had signed this Agreement. 

        17.    Severability.    In case any one or more of the provisions contained in this
Agreement shall for any reason be held to be invalid, illegal or unenforceable in any respect, such invalidity, illegality or unenforceability shall not affect any other provision of this Agreement
and such invalid, illegal and unenforceable provision shall be reformed and construed so that it will be valid, legal, and enforceable to the maximum extent permitted by law. 

        18.    Counterparts.    This Agreement may be executed in two or more counterparts, each
of which shall be deemed an original, but all of which together shall constitute one and the same instrument. 

        20.    Section Headings.    The headings contained in this Agreement are for reference
purposes only and shall not in any way affect the meaning or interpretation of this Agreement. 

        21.    Governing Law.    This Agreement shall be construed and enforced in accordance
with and governed by the laws of the State of New York. 

        22.    Second A&R Stockholders Agreement.    Upon and after the Closing (as defined in
the Merger Agreement), the Second A&R Stockholders Agreement shall be terminated and of no further force and effect. 

11

        IN WITNESS WHEREOF, the parties hereto have executed this THIRD AMENDED AND RESTATED STOCKHOLDERS AGREEMENT as of the date first above written. 

[Signature Page to Third Amended and Restated Stockholders' Agreement]

	BNP EUROPE TELECOM & MEDIA FUND II, LP	 	 
	

By:	
 	

/s/  SHAWNA MOREHOUSE AND JENNIFER FISCHETTI      
	
 	

 
	Name: Shawna Morehouse and Jennifer Fischetti	 	 
	Title: Authorized Signatories	 	 
	

By:	
 	

General Business, Finance and Investment Ltd., its General Partner	
 	

 
	By:	 	Commerce Advisory Services Ltd, as Director and Partnership Secretary	 	 
	

NATIO VIE DEVELOPPEMENT 3, FCPR	
 	

 
	

By:	
 	

/s/  JEAN-JACQUES BERTRAND      
	
 	

 
	Name: Jean-Jacques Bertrand	 	 
	Title: Authorized Signatory	 	 

[Signature Page to Third Amended and Restated Stockholders' Agreement]

	OAK INVESTMENT PARTNERS IX, LIMITED PARTNERSHIP	 	 
	

By:	
 	

Oak Associates IX, LLC, its General Partner	
 	

 
	

By:	
 	

/s/  EDWARD GLASSMEYER      
	
 	

 
	Name: Edward Glassmeyer	 	 
	Title: Managing Member	 	 
	

OAK IX AFFILIATES FUND, LIMITED PARTNERSHIP	
 	

 
	

By:	
 	

Oak IX Affiliates, LLC, its General Partner	
 	

 
	

By:	
 	

/s/  EDWARD GLASSMEYER      
	
 	

 
	Name: Edward Glassmeyer	 	 
	Title: Managing Member	 	 
	

OAK IX AFFILIATES FUND-A, LIMITED PARTNERSHIP	
 	

 
	

By:	
 	

Oak Associates IX, LLC, its General Partner	
 	

 
	

By:	
 	

/s/  EDWARD GLASSMEYER      
	
 	

 
	Name: Edward Glassmeyer	 	 
	Title: Managing Member	 	 

[Signature Page to Third Amended and Restated Stockholders' Agreement]

	JERUSALEM VENTURE PARTNERS III, L.P.	 	 
	

By:	
 	

Jerusalem Partners III, L.P., its General Partner	
 	

 
	By:	 	Jerusalem Venture Partners Corporation, its General Partner	 	 
	

By:	
 	

/s/  EREL MARGALIT      
	
 	

 
	Name: Erel Margalit	 	 
	

JERUSALEM VENTURE PARTNERS III (ISRAEL), L.P.	
 	

 
	

By:	
 	

Jerusalem Venture Partners III (Israel) Management Company Ltd.,

its General Partner	
 	

 
	By:	 	Jerusalem Venture Partners Corporation, its General Partner	 	 
	

By:	
 	

/s/  EREL MARGALIT      
	
 	

 
	Name: Erel Margalit	 	 
	

JERUSALEM VENTURE PARTNERS ENTREPRENEURS FUND III, L.P.	
 	

 
	

By:	
 	

Jerusalem Partners III, L.P., its General Partner	
 	

 
	By:	 	Jerusalem Venture Partners Corporation, its General Partner	 	 
	

By:	
 	

/s/  EREL MARGALIT      
	
 	

 
	Name: Erel Margalit	 	 

[Signature Page to Third Amended and Restated Stockholders' Agrement]

	JERUSALEM VENTURE PARTNERS IV, L.P.	 	 
	

By:	
 	

Jerusalem Partners IV, L.P., its General Partner	
 	

 
	By:	 	JVP Corp IV, its General Partner	 	 
	

By:	
 	

/s/  EREL MARGALIT      
	
 	

 
	Name: Erel Margalit	 	 
	

JERUSALEM VENTURE PARTNERS IV (Israel), L.P.	
 	

 
	

By:	
 	

Jerusalem Partners IV—Venture Capital, L.P., its General Partner	
 	

 
	By:	 	JVP Corp IV, its General Partner	 	 
	

By:	
 	

/s/  EREL MARGALIT      
	
 	

 
	Name: Erel Margalit	 	 
	

JERUSALEM VENTURE PARTNERS IV-A, L.P.	
 	

 
	

By:	
 	

Jerusalem Partners IV, L.P., its General Partner	
 	

 
	By:	 	JVP Corp IV, its General Partner	 	 
	

By:	
 	

/s/  EREL MARGALIT      
	
 	

 
	Name: Erel Margalit	 	 
	

JERUSALEM VENTURE PARTNERS ENTREPRENEURS FUND IV, L.P.	
 	

 
	

By:	
 	

Jerusalem Partners IV, L.P., its General Partner	
 	

 
	By:	 	JVP Corp IV, its General Partner	 	 
	

By:	
 	

/s/  EREL MARGALIT      
	
 	

 
	Name: Erel Margalit	 	 

[Signature Page to Third Amended and Restated Stockholders' Agreement]

	WORLDVIEW TECHNOLOGY PARTNERS III, L.P.	 	 
	

WORLDVIEW TECHNOLOGY INTERNATIONAL III, L.P.	
 	

 
	

WORLDVIEW STRATEGIC PARTNERS III, L.P.	
 	

 
	

WORLDVIEW III CARRIER FUND, L.P.	
 	

 
	

By:	
 	

Worldview Capital III, L.P., its General Partner	
 	

 
	By:	 	Worldview Equity I, L.L.C., its General Partner	 	 
	

By:	
 	

/s/  COLIN SAVAGE      
	
 	

 
	Name: Colin Savage	 	 
	

WORLDVIEW TECHNOLOGY PARTNERS IV, L.P.	
 	

 
	

WORLDVIEW TECHNOLOGY INTERNATIONAL IV, L.P.	
 	

 
	

WORLDVIEW STRATEGIC PARTNERS IV, L.P.	
 	

 
	

By:	
 	

Worldview Capital IV, L.P., its General Partner	
 	

 
	By:	 	Worldview Equity I, L.L.C., its General Partner	 	 
	

By:	
 	

/s/  COLIN SAVAGE      
	
 	

 
	Name: Colin Savage	 	 

[Signature Page to Third Amended and Restated Stockholders' Agreement]

	BROADVIEW CAPITAL PARTNERS L.P.	 	 
	

By:	
 	

Broadview Capital Partners Management LLC, its General Partner	
 	

 
	

By:	
 	

/s/  STEVEN D. BROOKS      
	
 	

 
	Name: Stephen D. Brooks	 	 
	Title: Managing Director	 	 
	

BROADVIEW CAPITAL PARTNERS QUALIFIED PURCHASER FUND L.P.	
 	

 
	

By:	
 	

Broadview Capital Partners Management LLC, its General Partner	
 	

 
	

By:	
 	

/s/  STEVEN D. BROOKS      
	
 	

 
	Name: Stephen D. Brooks	 	 
	Title: Managing Director	 	 

[Signature Page to Third Amended and Restated Stockholders' Agreement]

	BOULDER VENTURES IV, L.P.	 	 
	

By:	
 	

/s/  ANDREW E. JONES      
	
 	

 
	Name: Andrew E. Jones	 	 
	Title: General Partner	 	 
	

BOULDER VENTURES IV (ANNEX), L.P.	
 	

 
	

By:	
 	

/s/  ANDREW E. JONES      
	
 	

 
	Name: Andrew E. Jones	 	 
	Title: General Partner	 	 

[Signature Page to Third Amended and Restated Stockholders' Agreement]

	NAS PARTNERS I L.L.C.	 	 
	

By:	
 	

Nassau Capital LLC, its General Partner	
 	

 
	

By:	
 	

/s/  RANDALL A. HACK      
	
 	

 
	Name: Randall A. Hack	 	 
	Title: Sr. Managing Partner	 	 
	

NASSAU CAPITAL PARTNERS IV L.P.	
 	

 
	

By:	
 	

Nassau Capital LLC, its General Partner	
 	

 
	

By:	
 	

/s/  RANDALL A. HACK      
	
 	

 
	Name: Randall A. Hack	 	 
	Title: Sr. Managing Partner	 	 

[Signature Page to Third Amended and Restated Stockholders' Agreement]

	By:	 	/s/  DAVID SCHAEFFER      
 David Schaeffer	 	 

QuickLinks

COGENT COMMUNICATIONS GROUP, INC. THIRD AMENDED AND RESTATED STOCKHOLDERS AGREEMENT

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00064-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00064-of-00352.parquet"}]]