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THIS CERTIFIES THAT   is the owner of   DATED   COUNTERSIGNED AND REGISTERED:   COMPUTERSHARE TRUST COMPANY, N.A.   TRANSFER AGENT AND REGISTRAR,   FULLY-PAID AND NON-ASSESSABLE SHARES OF THE 8.125% SERIES A CUMULATIVE   REDEEMABLE PREFERRED STOCK, LIQUIDATION PREFERENCE $25.00 PER SHARE, OF   American Capital Mortgage Investment Corp. transferable on the books of the Corporation in person or by   duly authorized Attorney upon surrender of this certificate properly endorsed. This certificate shall not be valid   until countersigned and registered by the Transfer Agent and Registrar.   Witness the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers.   8.125% SERIES A CUMULATIVE   REDEEMABLE PREFERRED STOCK   PAR VALUE $0.01   8.125% SERIES A CUMULATIVE   REDEEMABLE PREFERRED STOCK   THIS CERTIFICATE IS TRANSFERABLE IN   CANTON, MA AND NEW YORK, NY   Certificate   Number   Shares   .   AMERICAN CAPITAL MORTGAGE INVESTMENT CORP.   INCORPORATED UNDER THE LAWS OF THE STATE OF MARYLAND   Chair of the Board & CEO   Executive Vice President & Secretary   By   AUTHORIZED SIGNATURE   CUSIP 02504A 20 3   016570|  003590|127C|RESTRICTED||4|057-423   <<Month Day, Year>>   * * 0 0 0 0 0 0 * * * * * *   * * * 0 0 0 0 0 0 * * * * *   * * * * 0 0 0 0 0 0 * * * *   * * * * * 0 0 0 0 0 0 * * *   * * * * * * 0 0 0 0 0 0 * *   ** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample   **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David   Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander   David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.   Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample ****   Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample   **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David   Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander   David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.   Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample ****   Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Sample **** Mr. Sample   **000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares***   *000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****   000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****0   00000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00   0000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000   000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****0000   00**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00000   0**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000   **Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000*   *Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**   Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**S   ***ZERO HUNDRED THOUSAND   ZERO HUNDRED AND ZERO***   MR. SAMPLE & MRS. SAMPLE &   MR. SAMPLE & MRS. SAMPLE   NNNNN   ZQ 000000   Certificate   Number   s   1234567890/123456789   0   1234567890/123456789   0   1234567890/123456789   0   1234567890/123456789   0   1234567890/123456789   0   1234567890/123456789   0   Total   Transactio   n   Num/No   .   123456   Denom   .   123456   Tota   l   1234567   MR   A SAMPL   E   DESIGN   ATION (IF ANY   )   ADD   1   ADD   2   ADD   3   ADD   4   PO    B   O   X 43004, Providence, R   I 02940-3004   Holder   ID   XXXXXXXXX   X   Insurance   Value      1,000,000.0   0   Number   of   Share   s   12345   6   DT   C   12345678      12345678901234   5    





 







The IRS requires that we report the cost basis of certain shares   acquired after January 1, 2011. If your shares were covered by   the legislation and you have sold or transferred the shares and   requested a specific cost basis calculation method, we have   processed as requested. If you did not specify a cost basis   calculation method, we have defaulted to the first in, first out   (FIFO) method. Please visit our website or consult your tax   advisor if you need additional information about cost basis.   If you do not keep in contact with us or do not have any   activity in your account for the time periods specified by state   law, your property could become subject to state unclaimed   property laws and transferred to the appropriate state.   For value received, ____________________________hereby sell, assign and transfer unto   ________________________________________________________________________________________________________________________________   ________________________________________________________________________________________________________________________________   ________________________________________________________________________________________________________________________________   _______________________________________________________________________________________________________________________ Shares   _______________________________________________________________________________________________________________________ Attorney   Dated: __________________________________________20__________________   Signature: ____________________________________________________________   Signature: ____________________________________________________________   Notice: The signature to this assignment must correspond with the name   as written upon the face of the certificate, in every particular,   without alteration or enlargement, or any change whatever.   PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE   (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE, OF ASSIGNEE)   of the common stock represented by the within Certificate, and do hereby irrevocably constitute and appoint   to transfer the said stock on the books of the within-named Company with full power of substitution in the premises.   .   AMERICAN CAPITAL MORTGAGE INVESTMENT CORP.   The Corporation will furnish without charge to each stockholder who so requests, a statement of the powers, designations, preferences and relative, participating,   optional or other special rights of each class of stock or series thereof which the Corporation is authorized to issue and the qualifications, limitations or restrictions   of such preferences and/or rights.  Any such request should be addressed to the Secretary of the Corporation at its principal office.   The shares represented by this certificate are subject to restrictions on Beneficial Ownership and Constructive Ownership and Transfer for the purpose, among   others, of the Corporation’s maintenance of its qualification as a Real Estate Investment Trust under the Internal Revenue Code of 1986, as amended (the “Code”).   Subject to certain further restrictions and except as expressly provided in the Corporation’s Charter, (i) no Person may Beneficially Own or Constructively Own   shares of the Corporation’s Common Stock in excess of 9.8 percent (in value or number of shares) of the outstanding shares of Common Stock of the Corporation   unless such Person is an Excepted Holder (in which case the Excepted Holder Limit shall be applicable); (ii) no Person may Beneficially Own or Constructively   Own shares of Capital Stock of the Corporation in excess of 9.8 percent (in value or number of shares) of the total outstanding shares of Capital Stock of the   Corporation, unless such Person is an Excepted Holder (in which case the Excepted Holder Limit shall be applicable); (iii) no Person may Beneficially Own or   Constructively Own Capital Stock that would result in the Corporation being “closely held” under Section 856(h) of the Code or otherwise cause the Corporation   to fail to qualify as a REIT; and (iv) no Person may Transfer shares of Capital Stock if such Transfer would result in the Capital Stock of the Corporation being   owned by fewer than 100 Persons. Ownership of Preferred Stock will be counted as Common Stock (on an as-converted basis), in addition to being counted as   Capital Stock, for purposes of such limitations. Any Person who Beneficially Owns or Constructively Owns or attempts to Beneficially Own or Constructively Own   shares of Capital Stock which causes or will cause a Person to Beneficially or Constructively Own shares of Capital Stock in excess or in violation of the above   limitations must immediately notify the Corporation.  If any restriction on transfer or ownership is violated, the shares of Capital Stock in excess or in violation of   the above limitations will be automatically transferred to a Trustee of a Trust for the benefit of one or more Charitable Beneficiaries.  In addition, the Corporation   may redeem shares upon the terms and conditions specified by the Board of Directors in its sole discretion if the Board of Directors determines that ownership or   a Transfer or other event may violate the restrictions described above.  Furthermore, upon the occurrence of certain events, attempted Transfers in violation of the   restrictions described above may be void ab initio.  All capitalized terms in this legend have the meanings defined in the Charter of the Corporation, as the same   may be amended from time to time, a copy of which, including the restrictions on transfer and ownership, will be furnished to each holder of Capital Stock of the   Corporation on request and without charge.  Requests for such a copy may be directed to the Secretary of the Corporation at its principal office.   Signature(s) Guaranteed: Medallion Guarantee Stamp   THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (Banks,   Stockbrokers, Savings and Loan Associations and Credit Unions) WITH MEMBERSHIP IN AN APPROVED   SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15.   The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full   according to applicable laws or regulations:   TEN COM - as tenants in common UNIF GIFT MIN ACT -............................................Custodian ................................................   (Cust) (Minor)   TEN ENT - as tenants by the entireties under Uniform Gifts to Minors Act.........................................................   (State)   JT TEN - as joint tenants with right of survivorship UNIF TRF MIN ACT -............................................Custodian (until age ................................)   and not as tenants in common (Cust)   .............................under Uniform Transfers to Minors Act ...................   (Minor) (State)   Additional abbreviations may also be used though not in the above list.