X0306 4 2018-02-10 false 0000876437 MGIC INVESTMENT CORP MTG 0001601481 Sperber Julie K. C/O MGIC INVESTMENT CORPORATION 250 EAST KILBOURN AVENUE MILWAUKEE WI 53202 false true false false VP-Chief Accounting Officer Common Stock 2018-02-10 4 F false 1066.00 14.01 D 103476.00 D Common Stock 2018-02-10 4 F false 1066.00 14.01 D 102410.00 D Common Stock 2018-02-10 4 F false 938.00 14.01 D 101472.00 D Common Stock 2018-02-10 4 F false 250.00 14.01 D 12696.00 I By Spouse Common Stock 2018-02-10 4 F false 249.00 14.01 D 12447.00 I By Spouse Common Stock 2018-02-10 4 F false 249.00 14.01 D 12198.00 I By Spouse Common Stock Common Stock 13250.00 14651.842 I By Spouse in Issure's Profit Sharing & Savings Plan The conversion price varies with the price of the Issuer's common stock. At any given time, the conversion price is equal to the closing price of the Issuer's common stock on the New York Stock Exchange on the previous trading day. These derivative securities may be exercised at any time. These derivative securities do not have any expiration date. Balance as of December 31, 2017 This Form 4 is being signed by the reporting person's attorney-in-fact pursuant to a previously filed power of attorney. Dan D. Stilwell, Attorney-in-Fact 2018-02-13