MGIC CEO corrects tax share withholding entry

MGIC Investment Corp Chief Executive Officer Timothy J. Mattke filed an amended insider report to correct a prior tax-related share withholding entry.

Rhea-AI Filing Summary

MGIC Investment Corp Chief Executive Officer Timothy J. Mattke filed an amended insider report to correct a prior tax-related share withholding entry. The filing shows that 307,691 shares of common stock were withheld on March 2, 2026 to satisfy tax obligations tied to vesting shares, a non-market, compensation-related disposition.

The earlier report stated 307,644 shares were withheld, and this amendment fixes that clerical error and adjusts his reported holdings. After this correction, Mattke directly beneficially owns 1,257,207.401 shares of common stock.

Insider Trade Summary

Exercise Price or Tax Liability: 307,691 shares

Exercise Price or Tax Liability 1 txn

Insider Mattke Timothy J.

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	307,691	$26.53	$8.16M

Holdings After Transaction: Common Stock — 1,257,207.401 shares (Direct)

Footnotes (1)

1. F1. The reporting person's Form 4, filed on March 3, 2026, reported that 307,644 shares were withheld to satisfy tax withholding obligations in connection with shares that vested on March 2, 2026. Due to a clerical error, the number of shares to be withheld was incorrectly calculated. This Form 4 corrects such error, including by decreasing the total amount of shares beneficially owned by the reporting person.

FAQ

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What does MGIC Investment (MTG) CEO Timothy Mattke’s amended Form 4 report?

The amended Form 4 corrects a prior tax-withholding entry. It clarifies that 307,691 MGIC common shares were withheld on March 2, 2026 for tax obligations on vesting shares, updating Timothy Mattke’s reported beneficial ownership accordingly.

How many MGIC (MTG) shares were withheld for taxes in this Form 4/A?

The filing reports that 307,691 MGIC common shares were withheld. These shares were used to satisfy tax withholding obligations when previously granted shares vested on March 2, 2026, rather than being sold in the open market.

What error is being corrected in this MGIC (MTG) CEO Form 4 amendment?

The amendment fixes a clerical error in the original report. That earlier filing stated 307,644 shares were withheld for taxes; the correct number is 307,691, which slightly reduces Timothy Mattke’s reported beneficial ownership.

Is Timothy Mattke’s MGIC (MTG) Form 4/A an open-market stock sale?

No, the transaction is not an open-market sale. The filing shows a tax-withholding disposition, where 307,691 shares were retained by the company to cover tax obligations on vested shares as part of equity compensation.

How many MGIC (MTG) shares does CEO Timothy Mattke own after this correction?

After the corrected tax-withholding entry, Timothy Mattke directly beneficially owns 1,257,207.401 MGIC common shares. The change reflects only the revised withholding amount; there are no new market purchases or sales reported.

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Accepted by SEC EDGAR 03/20/2026 - 04:11 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mattke Timothy J.

(Last) (First) (Middle)

C/O MGIC INVESTMENT CORPORATION

250 EAST KILBOURN AVENUE

(Street)

MILWAUKEE WISCONSIN 53202

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MGIC INVESTMENT CORP [ MTG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)
03/03/2026

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	03/02/2026		F		307,691(1)	D	$26.53	1,257,207.401	D

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 Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. The reporting person's Form 4, filed on March 3, 2026, reported that 307,644 shares were withheld to satisfy tax withholding obligations in connection with shares that vested on March 2, 2026. Due to a clerical error, the number of shares to be withheld was incorrectly calculated. This Form 4 corrects such error, including by decreasing the total amount of shares beneficially owned by the reporting person.

Remarks:

	Leslie A. Schunk, Attorney-in-Fact	03/20/2026
	** 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 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).
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.
* Form 4: SEC 1474 (03-26)