FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN 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

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(Print or Type Responses)

1. Name and Address of Reporting Person * MP Thrift Investments L.P.   2. Issuer Name and Ticker or Trading Symbol FLAGSTAR BANCORP INC [FBC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) CORPORATION SERVICE COMPANY, 2711 CENTERVILLE ROAD, SUITE 400 3. Date of Earliest Transaction (Month/Day/Year) 03/31/2010 (Street) WILMINGTON, DE 19808 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/31/2010   P   200,000,000 A $ 0.5 997,535,212 D (1) (3) (4)   Common Stock 04/01/2010   C   62,500,000 A $ 0.8 1,060,035,212 D (2) (3) (4)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MP Thrift Investments L.P. CORPORATION SERVICE COMPANY 2711 CENTERVILLE ROAD, SUITE 400 WILMINGTON, DE 19808		X

Signatures

/s/ Robert H. Weiss, General Counsel		04/01/2010
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(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)	On March 31, 2010, MPGOP III Thrift AV-I L.P. ("MPGOP"), a Delaware limited partnership, purchased 154,099,400 shares of Common Stock of Flagstar Bancorp, Inc. (the "Issuer") and, on the same date, MPGOP (Cayman) III Thrift AV-I L.P., a Cayman Islands exempted limited partnership ("MPGOP Cayman", and together with MPGOP, the "New Fund"), purchased a further 45,900,600 shares of Common Stock of the Issuer. On April 1, 2010, the New Fund irrevocably assigned and transferred their combined holdings of 200,000,000 shares of Common Stock of the Issuer to MP Thrift Investments L.P. ("MP Thrift"), a limited partnership organized under the laws of Delaware, formed for the purpose of making investments in the Issuer.
(2)	On April 1, 2010, MP Thrift elected to convert its holdings of 50,000 shares of trust preferred securities of the Issuer into 62,500,000 shares of Common Stock of the Issuer at a conversion price of $0.80 per share.
(3)	The New Fund holds 100% of the membership interests in MP Thrift. MPGOP has a 77.05% interest in MP Thrift and MPGOP Cayman has a 22.95% interest in MP Thrift. MP (Thrift) Global Partners III LLC ("MP LLC") is a limited liability company organized under the laws of Delaware. The principal business of MP LLC is to serve as general partner of each of MPGOP, MPGOP Cayman, MP Thrift, MP (Thrift) Global Opportunities Partners (Special) III LP ("MPGOPS") and MP (Thrift) Global Opportunities Investments III LP ("MPGOI"). MP (Thrift) Asset Management LLC ("MPAM") is a limited liability company organized under the laws of Delaware. MPAM is the managing member of MP LLC. MP (Thrift) LLC ("MPT") is a limited liability company organized under the laws of Delaware. MPT is the managing member of MPAM.
(4)	MPGOPS is a limited partnership organized under the laws of Delaware. MPGOPS is the holder of a 100% limited partnership interest in MPGOI. MPGOI is a limited partnership organized under the laws of Delaware. MPGOI is the holder of a 1% limited partnership interest in the New Fund.

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