SEC Form 3

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 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response: 0.5

1. Name and Address of Reporting Person* Nicolaisen Donald T (Last) (First) (Middle) MGIC PLAZA 250 EAST KILBOURN AVENUE (Street) MILWAUKEE WI 53202 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 10/26/2006	3. Issuer Name and Ticker or Trading Symbol MGIC INVESTMENT CORP [ MTG ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of 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

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)

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: 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

Explanation of Responses:

Remarks:

This Form 3 is being signed by the reporting person's attorney-in-fact pursuant to the attached power of attorney.

No securities are beneficially owned.

	Dan D. Stilwell, Attorney-in-Fact	10/26/2006
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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 Number.

Power of Attorney Regarding Form 3, Form 4, and Form 5





KNOW ALL BY THESE PRESENTS, that the undersigned, a person required to

file reports of changes in beneficial ownership of equity securities of

MGIC Investment Corporation (the "Company"), hereby appoints each person

who is the Chief Financial Officer, the Chief Accounting Officer, the

General Counsel, the Associate General Counsel, the Assistant General

Counsel, the Secretary, or any Assistant Secretary of the Company as the attorney-in-fact and agent of the undersigned to sign the undersigned's

name to any Form 3, Form 4, or Form 5 to be filed with the Securities and Exchange Commission or any securities exchange.  Each of the persons

authorized to act as such attorney-in-fact and agent above may do so

separately without the concurrence of the other persons.  The authority

granted hereunder is granted to the person occupying the position

specified at the time such authority is exercised.



Dated:   October 26, 2006







Signature: /s/ Donald T. Nicolaisen



Please print name:       Donald T. Nicolaisen