Form of Letter of Transmittal

DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.

THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL SHOULD BE READ CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES OF THE OFFER TO PURCHASE AND THIS LETTER OF TRANSMITTAL MAY BE MADE TO OR OBTAINED FROM THE INFORMATION AGENT AT ITS ADDRESS OR TELEPHONE NUMBERS SET FORTH BELOW.

You must sign this Letter of Transmittal in the appropriate space provided below, with signature guarantee if required, and complete the enclosed Internal Revenue Service Form W-9, if required.

We are not aware of any jurisdiction where the making of the offer (as defined below) is prohibited by any administrative or judicial action pursuant to any valid state statute. If we become aware of any valid state statute prohibiting the making of the offer or the acceptance of the Bronco shares, we will make a good faith effort to comply with that state statute. If, after a good faith effort, we cannot comply with the state statute, we will not make the offer to, nor will we accept tenders from or on behalf of, the holders of Bronco shares in that state. In any jurisdiction where the securities, blue sky or other laws require the offer to be made by a licensed broker or dealer, the offer will be deemed to be made on behalf of Purchaser or by one or more registered brokers or dealers licensed under the laws of such jurisdiction.

This Letter of Transmittal is to be used if certificates are to be forwarded herewith or, unless an Agent’s Message (as defined in the Offer to Purchase) is utilized, if delivery of Bronco shares (as defined below) is to be made by book-entry transfer to the Depositary’s account at The Depository Trust Company (the “Book-Entry Transfer Facility”) pursuant to the procedures set forth in Section 3 of the Offer to Purchase.

Holders of outstanding Bronco shares, whose certificates for such Bronco shares are not immediately available or who cannot deliver such certificates and all other required documents to the Depositary at or prior to the Expiration Date (as defined below) or who cannot complete the procedure for book-entry transfer on a timely basis, must tender their Bronco shares according to the guaranteed delivery procedure set forth in Section 3 of the Offer to Purchase. See Instruction 2. Delivery of documents to the Book-Entry Transfer Facility does not constitute delivery to the Depositary.

The undersigned hereby tenders to Nomac Acquisition, Inc., a Delaware corporation (“Purchaser”) and an indirect wholly owned subsidiary of Chesapeake Energy Corporation, an Oklahoma corporation (“Chesapeake”), the above-described shares of common stock, par value $0.01 per share (the “Bronco shares”), of Bronco Drilling Company, Inc., a Delaware corporation (“Bronco”), pursuant to Purchaser’s offer to purchase all outstanding Bronco shares at $11.00 per share in cash, without interest thereon, upon the terms and subject to the conditions set forth in the Offer to Purchase dated April 26, 2011, receipt of which is hereby acknowledged, and in this Letter of Transmittal (which, together with any amendments or supplements thereto, collectively constitute the “offer”). The offer expires at 12:00 Midnight, New York City time, at the end of Monday, May 23, 2011, unless extended by Purchaser as described in the Offer to Purchase (as extended from time to time, the “Expiration Date”). Purchaser reserves the right to assign, in whole or from time to time in part, to Chesapeake or to any direct or indirect wholly owned subsidiary of Chesapeake the right to purchase Shares tendered pursuant to the offer, but any such assignment will not relieve Purchaser of its obligations under the offer or prejudice your rights to receive payment for Bronco shares validly tendered and accepted for payment.

Upon the terms and subject to the conditions of the offer and effective upon acceptance for payment of and payment for the Bronco shares tendered herewith, the undersigned hereby sells, assigns and transfers to, or upon the order of, Purchaser all right, title and interest in and to all the Bronco shares that are being tendered hereby (and any and all other Bronco shares or other securities issued or issuable in respect thereof) and appoints the Depositary the true and lawful agent and attorney-in-fact of the undersigned with respect to such Bronco shares (and all such other Bronco shares or securities), with full power of substitution (such power of attorney being deemed to be an irrevocable power coupled with an interest), to (i) deliver certificates for such Bronco shares (and all such other Bronco shares or securities), or transfer ownership of such Bronco shares (and all such other Bronco shares or securities) on the account books maintained by the Book-Entry Transfer Facility, together, in any such case, with all accompanying evidences of transfer and authenticity, to or upon the order of Purchaser, (ii) present such Bronco shares (and all such other Bronco shares or securities) for transfer on the books of Bronco and (iii) receive all benefits and otherwise exercise all rights of beneficial ownership of such Bronco shares (and all such other Bronco shares or securities), all in accordance with the terms of the offer.

The undersigned hereby irrevocably appoints Aubrey K. McClendon, Domenic J. Dell’Osso, Jr. and Jennifer M. Grigsby in their respective capacities as officers of Purchaser, the attorneys and proxies of the undersigned, each with full power of substitution, to exercise all voting and other rights of the undersigned in such manner as each such attorney and proxy or his substitute shall in his sole discretion deem proper, with respect to all of the Bronco shares tendered hereby which have been accepted for payment by Purchaser prior to the time of any vote or other action (and any and all other Bronco shares or other securities issued or issuable in respect thereof), at any meeting of stockholders of Bronco (whether annual or special and whether or not an adjourned meeting), by written consent or otherwise. This proxy is irrevocable and is granted in consideration of, and is effective upon, the acceptance for payment of such Bronco shares by Purchaser in accordance with the terms of the offer. Such acceptance for payment shall revoke any other proxy or written consent granted by the undersigned at any time with respect to such Bronco shares (and all such other Bronco shares or securities), and no subsequent proxies will be given or written consents will be executed by the undersigned (and if given or executed, will not be deemed to be effective).

The undersigned hereby represents and warrants that the undersigned has full power and authority to tender, sell, assign and transfer the Bronco shares tendered herein (and any and all other Bronco shares or other securities issued or issuable in respect thereof) and that when the same are accepted for payment by Purchaser, Purchaser will acquire good and unencumbered title thereto, free and clear of all liens, restrictions, charges and encumbrances and not subject to any adverse claims. The undersigned will, upon request, execute and deliver any additional documents deemed by the Depositary or Purchaser to be necessary or desirable to complete the sale, assignment and transfer of the Bronco shares tendered hereby (and all such other Bronco shares or securities).

All authority herein conferred or agreed to be conferred shall survive the death or incapacity of the undersigned, and any obligation of the undersigned hereunder shall be binding upon the heirs, personal representatives, successors and assigns of the undersigned. Except as stated in the offer, this tender is irrevocable.

The undersigned understands that tenders of Bronco shares pursuant to any one of the procedures described in Section 3 of the Offer to Purchase and in the instructions hereto will constitute an agreement between the undersigned and Purchaser upon the terms and subject to the conditions of the offer. Without limiting the foregoing, if the price to be paid in the offer is amended in accordance with the terms of the merger agreement described in the offer, the price to be paid to the undersigned will be the amended price notwithstanding the fact that a different price is stated in this Letter of Transmittal.

Unless otherwise indicated under “Special Payment Instructions,” please issue the check for the purchase price of any Bronco shares purchased, and return any Bronco shares not tendered or not purchased, in the name(s) of the undersigned (and, in the case of Bronco shares tendered by book-entry transfer, by credit to the account at the Book-Entry Transfer Facility). Similarly, unless otherwise indicated under “Special Delivery Instructions,” please mail the check for the purchase price of any Bronco shares purchased and any certificates for Bronco shares not tendered or not purchased (and accompanying documents, as appropriate) to the undersigned at the address shown below the undersigned’s signature(s). In the event that both “Special Payment Instructions” and “Special Delivery Instructions” are completed, please issue the check for the purchase price of any Bronco shares purchased and return any Bronco shares not tendered or not purchased in the name(s) of , and mail said check and any certificates to, the person(s) so indicated. The undersigned recognizes that Purchaser has no obligation, pursuant to the “Special Payment Instructions,” to transfer any Bronco shares from the name of the registered holder(s) thereof if Purchaser does not accept for payment any of the Bronco shares so tendered.

SPECIAL PAYMENT INSTRUCTIONS

(See Instructions 6, 7 and 8)

To be completed ONLY if the check for the purchase price of Bronco shares purchased (less any applicable withholding taxes) or certificates for Bronco shares not tendered or not purchased are to be issued in the name of someone other than the undersigned.

Issue ¨ check ¨ certificates to:

Name

(Please Print)

Address

(Zip Code)

Taxpayer Identification Number

SPECIAL DELIVERY INSTRUCTIONS

(See Instructions 6, 7 and 8)

To be completed ONLY if the check for the purchase price of Bronco shares purchased (less any applicable withholding taxes) or certificates for Bronco shares not tendered or not purchased are to be mailed to someone other than the undersigned or to an address other than that shown under “Description of Shares Tendered” above.

Mail ¨ check ¨ certificates to:

Name

(Please Print)

Address

(Zip Code)

SIGN HERE

(Please complete the enclosed Internal Revenue Service Form W-9 below)

Signature(s) of Stockholder(s)

Dated , 20

Name(s)

(Please Print)

Business name, if different from above

Capacity (Full Title)

Address

(Zip Code)

Area Code and Telephone Number

(Must be signed by registered holder(s) exactly as name(s) appear(s) on stock certificate(s) or on a security position listing or by person(s) authorized to become registered holder(s) by certificates and documents transmitted herewith. If signature is by a trustee, executor, administrator, guardian, attorney-in-fact, agent, officer of a corporation or other person acting in a fiduciary or representative capacity, please set forth full title and see Instruction 5.)

Guarantee of Signature(s)

(If required; see Instructions 1 and 5)

(For use by Eligible Institutions only.

Place medallion guarantee in space below.)

Name of Firm

Address

(Zip Code)

Authorized Signature

Name

(Please Print)

Area Code and Telephone Number

Dated , 20

1. Guarantee of Signatures. Except as otherwise provided below, all signatures on this Letter of Transmittal must be guaranteed by a financial institution (including most banks, savings and loan associations and brokerage houses) that is a member of a recognized Medallion Program approved by The Securities Transfer Association, Inc., including the Securities Transfer Agents Medallion Program (STAMP), the Stock Exchange Medallion Program (SEMP) and the New York Stock Exchange, Inc. Medallion Signature Program (MSP) or any other “eligible guarantor institution” (as such term is defined in Rule 17Ad-15 under the Securities Exchange Act of 1934, as amended) (each an “Eligible Institution”). Signatures on this Letter of Transmittal need not be guaranteed (i) if this Letter of Transmittal is signed by the registered holder(s) of the Bronco shares (which term, for purposes of this document, shall include any participant in the Book-Entry Transfer Facility whose name appears on a security position listing as the owner of Bronco shares) tendered herewith and such holder(s) have not completed the box entitled “Special Payment Instructions” on this Letter of Transmittal or (ii) if such Bronco shares are tendered for the account of an Eligible Institution. See Instruction 5.

2. Delivery of Letter of Transmittal and Bronco Shares. This Letter of Transmittal is to be used either if certificates are to be forwarded herewith or, unless an Agent’s Message is utilized, if delivery of Bronco shares is to be made by book-entry transfer pursuant to the procedures set forth in Section 3 of the Offer to Purchase. Certificates for all physically delivered Bronco shares, or a confirmation of a book-entry transfer into the Depositary’s account at the Book-Entry Transfer Facility of all Bronco shares delivered electronically, as well as a properly completed and duly executed Letter of Transmittal, together with any required signature guarantees (or a manually signed facsimile thereof or, in the case of a book-entry transfer, an Agent’s Message) and any other documents required by this Letter of Transmittal, must be received by the Depositary at one of its addresses set forth on the front page of this Letter of Transmittal by the Expiration Date.

Stockholders whose certificates for Bronco shares are not immediately available or stockholders who cannot deliver their certificates and all other required documents to the Depositary or who cannot comply with the procedures for book-entry transfer by the Expiration Date may tender their Bronco shares pursuant to the guaranteed delivery procedure set forth in Section 3 of the Offer to Purchase.

(ii) a properly completed and duly executed Notice of Guaranteed Delivery substantially in the form provided by Purchaser with the Offer to Purchase must be received by the Depositary by the Expiration Date; and

(iii) the certificates for all physically delivered Bronco shares, or a confirmation of a book-entry transfer into the Depositary’s account at the Book-Entry Transfer Facility of all Bronco shares delivered electronically, as well as a properly completed and duly executed Letter of Transmittal with any required signature guarantee (or a manually signed facsimile thereof or, in the case of a book-entry delivery, an Agent’s Message) and any other documents required by this Letter of Transmittal, must be received by the Depositary within three NASDAQ trading days after the date of execution of such Notice of Guaranteed Delivery, all as provided in Section 3 of the Offer to Purchase.

The method of delivery of Bronco shares, this Letter of Transmittal and all other required documents are at the election and sole risk of the tendering stockholder. Bronco shares will be deemed delivered only when actually received by the Depositary (including, in the case of a book-entry by Book-Entry Confirmation). If certificates for Bronco shares are sent by mail, we recommend registered mail with return receipt requested, properly insured, in time to be received on or prior to the Expiration Date. In all cases, sufficient time should be allowed to ensure timely delivery.

No alternative, conditional or contingent tenders will be accepted, and no fractional Bronco shares will be purchased. By executing this Letter of Transmittal, the tendering stockholder waives any right to receive any notice of the acceptance for payment of the Bronco shares.

3. Inadequate Space. If the space provided herein is inadequate, the certificate numbers and/or the number of Bronco shares should be listed on a separate signed schedule attached hereto.

4. Partial Tenders (not applicable to stockholders who tender by book-entry transfer). If fewer than all the Bronco shares represented by any certificate delivered to the Depositary are to be tendered, fill in the number of Bronco shares which are to be tendered in the box entitled “Number of Shares Tendered.” In such case, a new certificate for the remainder of the Bronco shares represented by the old certificate will be issued and sent to the person(s) signing this Letter of Transmittal, unless otherwise provided in the appropriate box on this Letter of Transmittal, as promptly as practicable following the expiration or termination of the offer. All Bronco shares represented by certificates delivered to the Depositary will be deemed to have been tendered unless otherwise indicated.

5. Signatures on Letter of Transmittal; Stock Powers and Endorsements. If this Letter of Transmittal is signed by the registered holder(s) of the Bronco shares tendered hereby, the signature(s) must correspond with the name(s) as written on the face of the certificates without alteration or any change whatsoever.

If any of the Bronco shares tendered hereby are held of record by two or more persons, all such persons must sign this Letter of Transmittal.

If any of the Bronco shares tendered hereby are registered in different names on different certificates, it will be necessary to complete, sign and submit as many separate Letters of Transmittal as there are different registrations of certificates.

If this Letter of Transmittal is signed by the registered holder(s) of the Bronco shares tendered hereby, no endorsements of certificates or separate stock powers are required unless payment of the purchase price is to be made, or Bronco shares not tendered or not accepted for payment are to be returned, in the name of any person other than the registered holder(s). Signatures on any such certificates or stock powers must be guaranteed by an Eligible Institution.

If this Letter of Transmittal is signed by a person other than the registered holder(s) of the Bronco shares tendered hereby, certificates must be endorsed or accompanied by appropriate stock powers, in either case, signed exactly as the name(s) of the registered holder(s) appear(s) on the certificates for such Bronco shares. Signature(s) on any such certificates or stock powers must be guaranteed by an Eligible Institution.

If this Letter of Transmittal or any certificate or stock power is signed by a trustee, executor, administrator, guardian, attorney-in-fact, officer of a corporation or other person acting in a fiduciary or representative capacity, such person should so indicate when signing, and proper evidence satisfactory to Purchaser of the authority of such person so to act must be submitted.

6. Stock Transfer Taxes. Purchaser will pay any stock transfer taxes with respect to the sale and transfer of any Bronco shares to it or its order pursuant to the offer. If, however, payment of the purchase price is to be made to, or Bronco shares not tendered or not accepted for payment are to be returned in the name of, any person other than the registered holder(s), or if a transfer tax is imposed for any reason other than the sale or transfer of Bronco shares to Purchaser pursuant to the offer, then the amount of any stock transfer taxes (whether imposed on the registered holder(s), such other person or otherwise) will be deducted from the purchase price by the Depositary unless satisfactory evidence of the payment of such taxes, or exemption therefrom, is submitted herewith.

Except as provided in this Instruction 6, it will not be necessary for transfer tax stamps to be affixed to the Share Certificates listed in this Letter of Transmittal.

7. Special Payment and Delivery Instructions. If the check for the purchase price of any Bronco shares purchased is to be issued, or any Bronco shares not tendered or not purchased are to be returned, in the name of a person other than the person(s) signing this Letter of Transmittal or if the check or any certificates for Bronco shares not tendered or not purchased are to be mailed to someone other than the person(s) signing this Letter of Transmittal or to the person(s) signing this Letter of Transmittal at an address other than that shown above, the appropriate boxes on this Letter of Transmittal should be completed.

8. Internal Revenue Service Form W-9. Under the U.S. federal income tax laws, unless certain certification requirements are met, the Depositary generally will be required to withhold at the applicable backup withholding rate from any payments made to certain stockholders pursuant to the offer. In order to avoid such backup withholding, each tendering stockholder, and, if applicable, each other payee, must provide the Depositary with the taxpayer’s correct taxpayer identification number and certify that such stockholder or payee is not subject to backup withholding by completing the enclosed Internal Revenue Service Form W-9 (or other applicable form) or otherwise establishing an exemption from backup withholding. In general, if a stockholder or payee is an individual, the taxpayer identification number is the social security number of such individual. If the stockholder or payee does not provide the Depositary with its correct taxpayer identification number, the stockholder or payee may be subject to a penalty imposed by the Internal Revenue Service. Certain stockholders or payees (including, among others, certain foreign individuals) are not subject to these backup withholding and reporting requirements. In order to satisfy the Depositary that a foreign individual qualifies as an exempt recipient, such stockholder or payee must submit to the Depositary a properly completed Internal Revenue Service Form W-8BEN (which the Depositary will provide upon request), signed under penalties of perjury, attesting to that individual’s exempt status. Such W-8BEN can be obtained from the Depositary or the Internal Revenue Service (www.irs.gov/formspubs/index.html). For further information concerning backup withholding and instructions for completing the Internal Revenue Service Form W-9 (including how to obtain a taxpayer identification number if you do not have one and how to complete the Internal Revenue Service Form W-9 if Bronco shares are held in more than one name), consult the instructions on the enclosed Internal Revenue Service Form W-9 and your tax advisor.

Failure to complete the Internal Revenue Service Form W-9 will not, by itself, cause Bronco shares to be deemed invalidly tendered but may require the Depositary to backup withhold at the applicable backup withholding rate on any payments made pursuant to the offer. Backup withholding is not an additional U.S. federal income tax. Rather, the U.S. federal income tax liability of a person subject to backup withholding will be reduced by the amount of tax withheld. If withholding results in an overpayment of taxes, a refund may generally be obtained provided that the required information is furnished to the Internal Revenue Service. Each tendering stockholder should consult with a tax advisor regarding (i) qualifications for exemption from backup withholding, (ii) the procedure for obtaining the exemption and (iii) the applicable backup withholding rate.

9. Mutilated, Lost, Stolen or Destroyed Certificates. If the certificate(s) representing Bronco shares to be tendered have been mutilated, lost, stolen or destroyed, stockholders should (i) complete this Letter of Transmittal and check the appropriate box above and (ii) contact Bronco’s transfer agent, Computershare Trust Company, N.A., immediately by calling 1-800-962-4284. The stockholder will then be instructed as to the steps that must be taken in order to replace the certificate. This Letter of Transmittal and related documents cannot be processed until the procedures for replacing lost, mutilated, destroyed or stolen certificates have been followed.

10. Requests for Assistance or Additional Copies. Requests for assistance or additional copies of the Offer to Purchase and this Letter of Transmittal may be obtained from the Information Agent at its address or telephone numbers set forth below.

11. Waiver of Conditions. Purchaser reserves the right to waive any of the specified conditions of the offer in the case of any Bronco shares tendered.

IMPORTANT: This Letter of Transmittal together with any signature guarantees, or, in the case of a book-entry transfer, an Agent’s Message, and any other required documents, must be received by the Depositary on or prior to the Expiration Date and either certificates for tendered Bronco shares must be received by the Depositary or Bronco shares must be delivered pursuant to the procedures for book-entry transfer, in each case prior to the Expiration Date, or the tendering stockholder must comply with the procedures for guaranteed delivery.

Print or type

See

Specific Instructions

on page 2.

Name (as shown on your income tax return)

Business name/disregarded entity name, if different from above

Check appropriate box for federal tax

classification (required):

Individual/sole proprietor

C Corporation

S Corporation

Partnership

Trust/estate

¨ Limited liability company. Enter the tax classification (C = C corporation, S = S corporation, P = partnership) ^u

¨ Other (see instructions) ^u

^¨

Exempt payee

Address (number, street, and apt. or suite no.)

City, state, and ZIP code

Requester’s name and address (optional)

List account number(s) here (optional)

Certification instructions. You must cross out item 2 above if you have been notified by the IRS that you are currently subject to backup withholding because you have failed to report all interest and dividends on your tax return. For real estate transactions, item 2 does not apply. For mortgage interest paid, acquisition or abandonment of secured property, cancellation of debt, contributions to an individual retirement arrangement (IRA), and generally, payments other than interest and dividends, you are not required to sign the certification, but you must provide your correct TIN. See the instructions on page 4.

General Instructions

Section references are to the Internal Revenue Code unless otherwise noted.

Purpose of Form

A person who is required to file an information return with the IRS must obtain your correct taxpayer identification number (TIN) to report, for example, income paid to you, real estate transactions, mortgage interest you paid, acquisition or abandonment of secured property, cancellation of debt, or contributions you made to an IRA.

Use Form W-9 only if you are a U.S. person (including a resident alien), to provide your correct TIN to the person requesting it (the requester) and, when applicable, to:

1. Certify that the TIN you are giving is correct (or you are waiting for a number to be issued),

2. Certify that you are not subject to backup withholding, or

3. Claim exemption from backup withholding if you are a U.S. exempt payee. If applicable, you are also certifying that as a U.S. person, your allocable share of any partnership income from a U.S. trade or business is not subject to the withholding tax on foreign partners’ share of effectively connected income.

Note. If a requester gives you a form other than Form W-9 to request your TIN, you must use the requester’s form if it is substantially similar to this Form W-9.

Definition of a U.S. person. For federal tax purposes, you are considered a U.S. person if you are:

— An individual who is a U.S. citizen or U.S. resident alien,

— A partnership, corporation, company, or association created or organized in the United States or under the laws of the United States,

— An estate (other than a foreign estate), or

— A domestic trust (as defined in Regulations section 301.7701-7).

Special rules for partnerships. Partnerships that conduct a trade or business in the United States are generally required to pay a withholding tax on any foreign partners’ share of income from such business. Further, in certain cases where a Form W-9 has not been received, a partnership is required to presume that a partner is a foreign person, and pay the withholding tax. Therefore, if you are a U.S. person that is a partner in a partnership conducting a trade or business in the United States, provide Form W-9 to the partnership to establish your U.S. status and avoid withholding on your share of partnership income.

The person who gives Form W-9 to the partnership for purposes of establishing its U.S. status and avoiding withholding on its allocable share of net income from the partnership conducting a trade or business in the United States is in the following cases:

— The U.S. owner of a disregarded entity and not the entity,

— The U.S. grantor or other owner of a grantor trust and not the trust, and

— The U.S. trust (other than a grantor trust) and not the beneficiaries of the trust.

Foreign person. If you are a foreign person, do not use Form W-9. Instead, use the appropriate Form W-8 (see Publication 515, Withholding of Tax on Nonresident Aliens and Foreign Entities).

Nonresident alien who becomes a resident alien. Generally, only a nonresident alien individual may use the terms of a tax treaty to reduce or eliminate U.S. tax on certain types of income. However, most tax treaties contain a provision known as a “saving clause.” Exceptions specified in the saving clause may permit an exemption from tax to continue for certain types of income even after the payee has otherwise become a U.S. resident alien for tax purposes.

If you are a U.S. resident alien who is relying on an exception contained in the saving clause of a tax treaty to claim an exemption from U.S. tax on certain types of income, you must attach a statement to Form W-9 that specifies the following five items:

1. The treaty country. Generally, this must be the same treaty under which you claimed exemption from tax as a nonresident alien.

2. The treaty article addressing the income.

3. The article number (or location) in the tax treaty that contains the saving clause and its exceptions.

4. The type and amount of income that qualifies for the exemption from tax.

5. Sufficient facts to justify the exemption from tax under the terms of the treaty article.

Example. Article 20 of the U.S.-China income tax treaty allows an exemption from tax for scholarship income received by a Chinese student temporarily present in the United States. Under U.S. law, this student will become a resident alien for tax purposes if his or her stay in the United States exceeds 5 calendar years. However, paragraph 2 of the first Protocol to the U.S.-China treaty (dated April 30, 1984) allows the provisions of Article 20 to continue to apply even after the Chinese student becomes a resident alien of the United States. A Chinese student who qualifies for this exception (under paragraph 2 of the first protocol) and is relying on this exception to claim an exemption from tax on his or her scholarship or fellowship income would attach to Form W-9 a statement that includes the information described above to support that exemption.

If you are a nonresident alien or a foreign entity not subject to backup withholding, give the requester the appropriate completed Form W-8.

What is backup withholding? Persons making certain payments to you must under certain conditions withhold and pay to the IRS a percentage of such payments. This is called “backup withholding.” Payments that may be subject to backup withholding include interest, tax-exempt interest, dividends, broker and barter exchange transactions, rents, royalties, nonemployee pay, and certain payments from fishing boat operators. Real estate transactions are not subject to backup withholding.

You will not be subject to backup withholding on payments you receive if you give the requester your correct TIN, make the proper certifications, and report all your taxable interest and dividends on your tax return.

Payments you receive will be subject to backup withholding if:

1. You do not furnish your TIN to the requester,

2. You do not certify your TIN when required (see the Part II instructions on page 3 for details),

3. The IRS tells the requester that you furnished an incorrect TIN,

4. The IRS tells you that you are subject to backup withholding because you did not report all your interest and dividends on your tax return (for reportable interest and dividends only), or

5. You do not certify to the requester that you are not subject to backup withholding under 4 above (for reportable interest and dividend accounts opened after 1983 only).

Certain payees and payments are exempt from backup withholding. See the instructions below and the separate Instructions for the Requester of Form W-9.

Also see Special rules for partnerships on page 1.

Updating Your Information

You must provide updated information to any person to whom you claimed to be an exempt payee if you are no longer an exempt payee and anticipate receiving reportable payments in the future from this person. For example, you may need to provide updated information if you are a C corporation that elects to be an S corporation, or if you no longer are tax exempt. In addition, you must furnish a new Form W-9 if the name or TIN changes for the account, for example, if the grantor of a grantor trust dies.

Penalties

Failure to furnish TIN. If you fail to furnish your correct TIN to a requester, you are subject to a penalty of $50 for each such failure unless your failure is due to reasonable cause and not to willful neglect.

Civil penalty for false information with respect to withholding. If you make a false statement with no reasonable basis that results in no backup withholding, you are subject to a $500 penalty.

Criminal penalty for falsifying information. Willfully falsifying certifications or affirmations may subject you to criminal penalties including fines and/or imprisonment.

Misuse of TINs. If the requester discloses or uses TINs in violation of federal law, the requester may be subject to civil and criminal penalties.

Specific Instructions

Name

If you are an individual, you must generally enter the name shown on your income tax return. However, if you have changed your last name, for instance, due to marriage without informing the Social Security Administration of the name change, enter your first name, the last name shown on your social security card, and your new last name.

If the account is in joint names, list first, and then circle, the name of the person or entity whose number you entered in Part I of the form.

Sole proprietor. Enter your individual name as shown on your income tax return on the “Name” line. You may enter your business, trade, or “doing business as (DBA)” name on the “Business name/disregarded entity name” line.

Partnership, C Corporation, or S Corporation. Enter the entity’s name on the “Name” line and any business, trade, or “doing business as (DBA) name” on the “Business name/disregarded entity name” line.

Disregarded entity. Enter the owner’s name on the “Name” line. The name of the entity entered on the “Name” line should never be a disregarded entity. The name on the “Name” line must be the name shown on the income tax return on which the income will be reported. For example, if a foreign LLC that is treated as a disregarded entity for U.S. federal tax purposes has a domestic owner, the domestic owner’s name is required to be provided on the “Name” line. If the direct owner of the entity is also a disregarded entity, enter the first owner that is not disregarded for federal tax purposes. Enter the disregarded entity’s name on the “Business name/disregarded entity name” line. If the owner of the disregarded entity is a foreign person, you must complete an appropriate Form W-8.

Note. Check the appropriate box for the federal tax classification of the person whose name is entered on the “Name” line (Individual/sole proprietor, Partnership, C Corporation, S Corporation, Trust/estate).

Limited Liability Company (LLC). If the person identified on the “Name” line is an LLC, check the “Limited liability company” box only and enter the appropriate code for the tax classification in the space provided. If you are an LLC that is treated as a partnership for federal tax purposes, enter “P” for partnership. If you are an LLC that has filed a Form 8832 or a Form 2553 to be taxed as a corporation, enter “C” for C corporation or “S” for S corporation. If you are an LLC that is disregarded as an entity separate from its owner under Regulation section 301.7701-3 (except for employment and excise tax), do not check the LLC box unless the owner of the LLC (required to be identified on the “Name” line) is another LLC that is not disregarded for federal tax purposes. If the LLC is disregarded as an entity separate from its owner, enter the appropriate tax classification of the owner identified on the “Name” line.

Other entities. Enter your business name as shown on required federal tax documents on the “Name” line. This name should match the name shown on the charter or other legal document creating the entity. You may enter any business, trade, or DBA name on the “Business name/disregarded entity name” line.

Exempt Payee

If you are exempt from backup withholding, enter your name as described above and check the appropriate box for your status, then check the “Exempt payee” box in the line following the “Business name/disregarded entity name,” sign and date the form.

Generally, individuals (including sole proprietors) are not exempt from backup withholding. Corporations are exempt from backup withholding for certain payments, such as interest and dividends.

Note. If you are exempt from backup withholding, you should still complete this form to avoid possible erroneous backup withholding.

The following payees are exempt from backup withholding:

1. An organization exempt from tax under section 501(a), any IRA, or a custodial account under section 403(b)(7) if the account satisfies the requirements of section 401(f)(2),

2. The United States or any of its agencies or instrumentalities,

3. A state, the District of Columbia, a possession of the United States, or any of their political subdivisions or instrumentalities,

4. A foreign government or any of its political subdivisions, agencies, or instrumentalities, or

5. An international organization or any of its agencies or instrumentalities.

Other payees that may be exempt from backup withholding include:

6. A corporation,

7. A foreign central bank of issue,

8. A dealer in securities or commodities required to register in the United States, the District of Columbia, or a possession of the United States,

9. A futures commission merchant registered with the Commodity Futures Trading Commission,

10. A real estate investment trust,

11. An entity registered at all times during the tax year under the Investment Company Act of 1940,

12. A common trust fund operated by a bank under section 584(a),

13. A financial institution,

14. A middleman known in the investment community as a nominee or custodian, or

15. A trust exempt from tax under section 664 or described in section 4947.

The following chart shows types of payments that may be exempt from backup withholding. The chart applies to the exempt payees listed above, 1 through 15.


IF the payment is for . . .		THEN the payment is exempt for . . .
Interest and dividend payments		All exempt payees except for 9
Broker transactions		Exempt payees 1 through 5 and 7 through 13. Also, C corporations.
Barter exchange transactions and patronage dividends		Exempt payees 1 through 5
Payments over $600 required to be reported and direct sales over $5,000 ¹		Generally, exempt payees 1 through 7 ²

¹	See Form 1099-MISC, Miscellaneous Income, and its instructions.

²	However, the following payments made to a corporation and reportable on Form 1099-MISC are not exempt from backup withholding: medical and health care payments, attorneys’ fees, gross proceeds paid to an attorney, and payments for services paid by a federal executive agency.

Part I. Taxpayer Identification Number (TIN)

Enter your TIN in the appropriate box. If you are a resident alien and you do not have and are not eligible to get an SSN, your TIN is your IRS individual taxpayer identification number (ITIN). Enter it in the social security number box. If you do not have an ITIN, see How to get a TIN below.

If you are a sole proprietor and you have an EIN, you may enter either your SSN or EIN. However, the IRS prefers that you use your SSN.

If you are a single-member LLC that is disregarded as an entity separate from its owner (see Limited Liability Company (LLC) on page 2), enter the owner’s SSN (or EIN, if the owner has one). Do not enter the disregarded entity’s EIN. If the LLC is classified as a corporation or partnership, enter the entity’s EIN.

Note. See the chart on page 4 for further clarification of name and TIN combinations.

How to get a TIN. If you do not have a TIN, apply for one immediately. To apply for an SSN, get Form SS-5, Application for a Social Security Card, from your local Social Security Administration office or get this form online at www.ssa.gov. You may also get this form by calling 1-800-772-1213. Use Form W-7, Application for IRS Individual Taxpayer Identification Number, to apply for an ITIN, or Form SS-4, Application for Employer Identification Number, to apply for an EIN. You can apply for an EIN online by accessing the IRS website at www.irs.gov/businesses and clicking on Employer Identification Number (EIN) under Starting a Business. You can get Forms W-7 and SS-4 from the IRS by visiting IRS.gov or by calling 1-800-TAX-FORM (1-800-829-3676).

If you are asked to complete Form W-9 but do not have a TIN, write “Applied For” in the space for the TIN, sign and date the form, and give it to the requester. For interest and dividend payments, and certain payments made with respect to readily tradable instruments, generally you will have 60 days to get a TIN and give it to the requester before you are subject to backup withholding on payments. The 60-day rule does not apply to other types of payments. You will be subject to backup withholding on all such payments until you provide your TIN to the requester.

Note. Entering “Applied For” means that you have already applied for a TIN or that you intend to apply for one soon.

Caution: A disregarded domestic entity that has a foreign owner must use the appropriate Form W-8.

Part II. Certification

To establish to the withholding agent that you are a U.S. person, or resident alien, sign Form W-9. You may be requested to sign by the withholding agent even if item 1, below, and items 4 and 5 on page 4 indicate otherwise.

For a joint account, only the person whose TIN is shown in Part I should sign (when required). In the case of a disregarded entity, the person identified on the “Name” line must sign. Exempt payees, see Exempt Payee on page 3.

Signature requirements. Complete the certification as indicated in items 1 through 3, below, and items 4 and 5 on page 4.

1. Interest, dividend, and barter exchange accounts opened before 1984 and broker accounts considered active during 1983. You must give your correct TIN, but you do not have to sign the certification.

2. Interest, dividend, broker, and barter exchange accounts opened after 1983 and broker accounts considered inactive during 1983. You must sign the certification or backup withholding will apply. If you are subject to backup withholding and you are merely providing your correct TIN to the requester, you must cross out item 2 in the certification before signing the form.

3. Real estate transactions. You must sign the certification. You may cross out item 2 of the certification.

4. Other payments. You must give your correct TIN, but you do not have to sign the certification unless you have been notified that you have previously given an incorrect TIN. “Other payments” include payments made in the course of the requester’s trade or business for rents, royalties, goods (other than bills for merchandise), medical and health care services (including payments to corporations), payments to a nonemployee for services, payments to certain fishing boat crew members and fishermen, and gross proceeds paid to attorneys (including payments to corporations).

5. Mortgage interest paid by you, acquisition or abandonment of secured property, cancellation of debt, qualified tuition program payments (under section 529), IRA, Coverdell ESA, Archer MSA or HSA contributions or distributions, and pension distributions. You must give your correct TIN, but you do not have to sign the certification.

What Name and Number To Give the Requester


For this type of account:			Give name and SSN of:
	1.	Individual	The individual
	2.	Two or more individuals (joint account)	The actual owner of the account or, if combined funds, the first individual on the account ¹
	3.	Custodian account of a minor (Uniform Gift to Minors Act)	The minor ²
	4.	a. The usual revocable savings trust (grantor is also trustee)	The grantor-trustee ¹
		b. So-called trust account that is not a legal or valid trust under state law	The actual owner ¹
	5.	Sole proprietorship or disregarded entity owned by an individual	The owner ³
	6.	Grantor trust filing under Optional Form 1099 Filing Method 1 (see Regulation section 1.671-4(b)(2)(i)(A))	The grantor *
For this type of account:			Give name and EIN of:
	7.	Disregarded entity not owned by an individual	The owner
	8.	A valid trust, estate, or pension trust	Legal entity ⁴
	9.	Corporation or LLC electing corporate status on Form 8832 or Form 2553	The corporation
	10.	Association, club, religious, charitable, educational, or other tax-exempt organization	The organization
	11.	Partnership or multi-member LLC	The partnership
	12.	A broker or registered nominee	The broker or nominee
	13.	Account with the Department of Agriculture in the name of a public entity (such as a state or local government, school district, or prison) that receives agricultural program payments	The public entity
	14.	Grantor trust filing under the Form 1041 Filing Method or the Optional Form 1099 Filing Method 2 (see Regulation section 1.671-4(b)(2)(i)(B))	The trust

¹	List first and circle the name of the person whose number you furnish. If only one person on a joint account has an SSN, that person’s number must be furnished.

²	Circle the minor’s name and furnish the minor’s SSN.

³	You must show your individual name and you may also enter your business or “DBA” name on the “Business name/disregarded entity” name line. You may use either your SSN or EIN (if you have one), but the IRS encourages you to use your SSN.

⁴	List first and circle the name of the trust, estate, or pension trust. (Do not furnish the TIN of the personal representative or trustee unless the legal entity itself is not designated in the account title.) Also see Special rules for partnerships on page 1.

*Note. Grantor also must provide a Form W-9 to trustee of trust.

Note. If no name is circled when more than one name is listed, the number will be considered to be that of the first name listed.

Secure Your Tax Records from Identity Theft

Identity theft occurs when someone uses your personal information such as your name, social security number (SSN), or other identifying information, without your permission, to commit fraud or other crimes. An identity thief may use your SSN to get a job or may file a tax return using your SSN to receive a refund.

To reduce your risk:

— Protect your SSN,

— Ensure your employer is protecting your SSN, and

— Be careful when choosing a tax preparer.

If your tax records are affected by identity theft and you receive a notice from the IRS, respond right away to the name and phone number printed on the IRS notice or letter.

If your tax records are not currently affected by identity theft but you think you are at risk due to a lost or stolen purse or wallet, questionable credit card activity or credit report, contact the IRS Identity Theft Hotline at 1-800-908-4490 or submit Form 14039.

For more information, see Publication 4535, Identity Theft Prevention and Victim Assistance.

Victims of identity theft who are experiencing economic harm or a system problem, or are seeking help in resolving tax problems that have not been resolved through normal channels, may be eligible for Taxpayer Advocate Service (TAS) assistance. You can reach TAS by calling the TAS toll-free case intake line at 1-877-777-4778 or TTY/TDD 1-800-829-4059.

Protect yourself from suspicious emails or phishing schemes. Phishing is the creation and use of email and websites designed to mimic legitimate business emails and websites. The most common act is sending an email to a user falsely claiming to be an established legitimate enterprise in an attempt to scam the user into surrendering private information that will be used for identity theft.

The IRS does not initiate contacts with taxpayers via emails. Also, the IRS does not request personal detailed information through email or ask taxpayers for the PIN numbers, passwords, or similar secret access information for their credit card, bank, or other financial accounts.

If you receive an unsolicited email claiming to be from the IRS, forward this message to phishing@irs.gov. You may also report misuse of the IRS name, logo, or other IRS property to the Treasury Inspector General for Tax Administration at 1-800-366-4484. You can forward suspicious emails to the Federal Trade Commission at: spam@uce.gov or contact them at www.ftc.gov/idtheft or 1-877-IDTHEFT (1-877-438-4338).

Visit IRS.gov to learn more about identity theft and how to reduce your risk.

Section 6109 of the Internal Revenue Code requires you to provide your correct TIN to persons (including federal agencies) who are required to file information returns with the IRS to report interest, dividends, or certain other income paid to you; mortgage interest you paid; the acquisition or abandonment of secured property; the cancellation of debt; or contributions you made to an IRA, Archer MSA, or HSA. The person collecting this form uses the information on the form to file information returns with the IRS, reporting the above information. Routine uses of this information include giving it to the Department of Justice for civil and criminal litigation and to cities, states, the District of Columbia, and U.S. possessions for use in administering their laws. The information also may be disclosed to other countries under a treaty, to federal and state agencies to enforce civil and criminal laws, or to federal law enforcement and intelligence agencies to combat terrorism. You must provide your TIN whether or not you are required to file a tax return. Under section 3406, payers must generally withhold a percentage of taxable interest, dividend, and certain other payments to a payee who does not give a TIN to the payer. Certain penalties may also apply for providing false or fraudulent information.


By Mail:		By Overnight Courier:

Computershare c/o Voluntary Corporate Actions P.O. Box 43011 Providence, RI 02940-3011		Computershare c/o Voluntary Corporate Actions 250 Royall Street/Suite V Canton, MA 02021


DESCRIPTION OF SHARES TENDERED
	Shares Tendered (Attach additional list if necessary)
Name(s) and Address(es) of Registered Holder(s) (Please fill in, if blank, exactly as name(s) appear(s) on Share Certificate(s))	Certificate Number(s)*	Total Number of Shares Represented by Certificate(s)*	Number of Shares Tendered**














	Total Shares Tendered
* Need not be completed by stockholders tendering by book-entry transfer. ** Unless otherwise indicated, it will be assumed that all shares represented by any certificates delivered to the Depositary are being tendered. See Instruction 4.


Part II		Certification


Sign Here		Signature of U.S. person ^u		Date ^u


		Cat. No. 10231X		Form W-9 (Rev. 1-2011)