Ownership Submission
FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  ValueAct Holdings, L.P.
2. Date of Event Requiring Statement (Month/Day/Year)
06/12/2008
3. Issuer Name and Ticker or Trading Symbol
CHIMERA INVESTMENT CORP [CIM]
(Last)
(First)
(Middle)
435 PACIFIC AVENUE, FOURTH FLOOR
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

SAN FRANSISCO, CA 94133
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock, par value $.01 per share 3,881,028
I
See footnote (1)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
ValueAct Holdings, L.P.
435 PACIFIC AVENUE, FOURTH FLOOR
SAN FRANSISCO, CA 94133
    X    
VA Partners III, LLC
435 PACIFIC AVENUE, FOURTH FLOOR
SAN FRANCISCO, CA 94133
    X    
ValueAct Capital Management, L.P.
435 PACIFIC AVENUE, FOURTH FLOOR
SAN FRANCISCO, CA 94133
    X    
ValueAct Capital Management, LLC
435 PACIFIC AVENUE, FOURTH FLOOR
SAN FRANCISCO, CA 94133
    X    
ValueAct Holdings GP, LLC
435 PACIFIC AVENUE, FOURTH FLOOR
SAN FRANCISCO, CA 94133
    X    

Signatures

VALUEACT HOLDINGS, L.P., By: VALUEACT HOLDINGS GP, LLC, its General Partner, By:/s/ George F. Hamel. Jr., Chief Operating Officer 06/16/2008
**Signature of Reporting Person Date

VALUEACT CAPITAL MASTER FUND III, L.P., By: VA PARTNERS III, LLC, its General Partner, By:/s/ George F. Hamel. Jr., Chief Operating Officer 06/16/2008
**Signature of Reporting Person Date

VA PARTNERS III, LLC, By:/s/ George F. Hamel. Jr., Chief Operating Officer 06/16/2008
**Signature of Reporting Person Date

VALUEACT CAPITAL MANAGEMENT, L.P., By: VALUEACT CAPITAL MANAGEMENT, LLC, its General Partner, By:/s/ George F. Hamel. Jr., Chief Operating Officer 06/16/2008
**Signature of Reporting Person Date

VALUEACT CAPITAL MANAGEMENT, LLC, By:/s/ George F. Hamel. Jr., Chief Operating Officer 06/16/2008
**Signature of Reporting Person Date

VALUEACT HOLDINGS GP, LLC, By:/s/ George F. Hamel. Jr., Chief Operating Officer 06/16/2008
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The reported stock is owned directly by ValueAct Capital Master Fund III, L.P. and may be deemed to be beneficially owned by (i) VA Partners III, LLC as General Partner of ValueAct Capital Master Fund III, L.P., (ii) ValueAct Capital Management, L.P. as the manager of ValueAct Capital Master Fund III, L.P., (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P., (iv) ValueAct Holdings, L.P. as the sole owner of the limited partnership interests of ValueAct Capital Management, L.P. and the membership interests of ValueAct Capital Management, LLC, and as the majority owner of the membership interests of VA Partners III, LLC, and (v) ValueAct Holdings GP, LLC as General Partner of ValueAct Holdings, L.P.
 
Remarks:
Joint Filer Information:


Name: ValueAct Capital Master Fund III, L.P.
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133
Designated Filer: ValueAct Holdings, L.P.
Issuer and Ticker: Chimera Investment Corporation (CIM)
Date of Event Requiring Statement: 06/12/2008

Name: VA Partners III, LLC
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133
Designated Filer: ValueAct Holdings, L.P.
Issuer and Ticker: Chimera Investment Corporation (CIM)
Date of Event Requiring Statement: 06/12/2008

Name: ValueAct Capital Management, L.P.
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133
Designated Filer: ValueAct Holdings, L.P.
Issuer and Ticker: Chimera Investment Corporation (CIM)
Date of Event Requiring Statement: 06/12/2008

Name: ValueAct Capital Management, LLC
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133
Designated Filer: ValueAct Holdings, L.P.
Issuer and Ticker: Chimera Investment Corporation (CIM)
Date of Event Requiring Statement: 06/12/2008

Name: ValueAct Holdings GP, LLC
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133
Designated Filer: ValueAct Holdings, L.P.
Issuer and Ticker: Chimera Investment Corporation (CIM)
Date of Event Requiring Statement: 06/12/2008

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.