MGIC Investment Corporation
MX ˙ BMV ˙ US5528481030
SecurityMX:MTG / MGIC Investment Corporation
InstitutionHeartland Advisors Inc
Latest Disclosed Ownership450,000 shares
Latest Disclosed Value $ 11,812,500
Heartland Advisors Inc reports 21.74% decrease in ownership of MTG / MGIC Investment Corporation

On May 6, 2026 - Heartland Advisors Inc filed a 13F-HR form disclosing ownership of 450,000 shares of MGIC Investment Corporation (MX:MTG) valued at $11,812,500 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 575,035 shares of MGIC Investment Corporation. This represents a change in shares of -21.74% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-06 2026-03-31 13F MGIC INVT CORP WIS COM 552848103 450,000 -125,035 -21.74 11,812 -29.70 0.6025
2026-02-11 2025-12-31 13F MGIC INVT CORP WIS COM 552848103 575,035 -89,572 -13.48 16,803 -10.88 0.9050
2025-11-07 2025-09-30 13F MGIC INVT CORP WIS COM 552848103 664,607 1,140 0.17 18,855 2.08 0.9961
2025-08-12 2025-06-30 13F MGIC INVESTMENT CORP WIS COM 552848103 663,467 -50,527 -7.08 18,471 4.40 1.0299
2025-05-07 2025-03-31 13F MGIC INVT CORP WIS COM 552848103 713,994 26,124 3.80 17,693 8.48 1.0159
2025-02-12 2024-12-31 13F MGIC INVT CORP WIS COM 552848103 687,870 -52,181 -7.05 16,309 -13.91 0.8864
2024-11-12 2024-09-30 13F MGIC INVT CORP WIS COM 552848103 740,051 0 0.00 18,945 18.79 0.9934
2024-08-08 2024-06-30 13F MGIC INVT CORP WIS COM 552848103 740,051 80,737 12.25 15,948 8.18 0.8926
2024-05-07 2024-03-31 13F MGIC INVT CORP WIS COM 552848103 659,314 159,314 31.86 14,742 52.85 0.7726
2024-02-08 2023-12-31 13F MGIC INVT CORP WIS COM 552848103 500,000 0 0.00 9,645 15.58 0.5040
2023-11-08 2023-09-30 13F MGIC INVT CORP WIS COM 552848103 500,000 0 0.00 8,345 5.70 0.4689
2023-08-10 2023-06-30 13F MGIC INVT CORP WIS COM 552848103 500,000 0 0.00 7,895 17.66 0.4517
2023-05-11 2023-03-31 13F MGIC INVT CORP WIS COM 552848103 500,000 0 0.00 6,710 3.23 0.4147
2023-02-08 2022-12-31 13F MGIC INVT CORP WIS COM 552848103 500,000 0 0.00 6,500 1.40 0.4118
2022-11-10 2022-09-30 13F MGIC INVT CORP WIS COM 552848103 500,000 -100,000 -16.67 6,410 -15.21 0.4791
2022-08-12 2022-06-30 13F MGIC INVT CORP WIS COM 552848103 600,000 0 0.00 7,560 -7.01 0.5253
2022-05-12 2022-03-31 13F MGIC INVT CORP WIS COM 552848103 600,000 -100,000 -14.29 8,130 -19.46 0.5043
2022-02-09 2021-12-31 13F MGIC INVT CORP WIS COM 552848103 700,000 0 0.00 10,094 -3.61 0.5916
2021-11-09 2021-09-30 13F MGIC INVT CORP WIS COM 552848103 700,000 -424,700 -37.76 10,472 -31.54 0.6315
2021-08-11 2021-06-30 13F MGIC INVT CORP WIS COM 552848103 1,124,700 -2,900 -0.26 15,296 -2.06 0.8863
2021-05-12 2021-03-31 13F MGIC INVT CORP WIS COM 552848103 1,127,600 -215,900 -16.07 15,617 -7.38 0.9870
2021-02-11 2020-12-31 13F MGIC INVT CORP WIS COM 552848103 1,343,500 -289,800 -17.74 16,861 16.52 1.2042
2020-11-12 2020-09-30 13F MGIC INVT CORP WIS COM 552848103 1,633,300 3,500 0.21 14,471 8.41 1.2589
2020-08-12 2020-06-30 13F MGIC INVT CORP WIS COM 552848103 1,629,800 27,400 1.71 13,348 31.18 1.1880
2020-05-13 2020-03-31 13F MGIC INVT CORP WIS COM 552848103 1,602,400 43,200 2.77 10,175 -53.95 1.0871
2020-02-11 2019-12-31 13F MGIC INVT CORP WIS COM 552848103 1,559,200 -39,600 -2.48 22,094 9.85 1.6279
2019-11-12 2019-09-30 13F MGIC INVT CORP WIS COM 552848103 1,598,800 500 0.03 20,113 -4.23 1.5349
2019-08-08 2019-06-30 13F MGIC INVT CORP WIS COM 552848103 1,598,300 -2,250 -0.14 21,002 -0.52 1.5442
2019-05-13 2019-03-31 13F MGIC INVT CORP WIS COM 552848103 1,600,550 -135,250 -7.79 21,111 16.28 1.5609
2019-02-12 2018-12-31 13F MGIC INVT CORP WIS COM 552848103 1,735,800 100 0.01 18,156 -21.41 1.4994
2018-11-08 2018-09-30 13F MGIC INVT CORP WIS COM 552848103 1,735,700 20,400 1.19 23,102 25.64 1.5424
2018-08-02 2018-06-30 13F MGIC INVT CORP WIS COM 552848103 1,715,300 -1,378 -0.08 18,388 -17.61 1.2117
2018-05-10 2018-03-31 13F MGIC INVT CORP WIS COM 552848103 1,716,678 -627,903 -26.78 22,317 -32.54 1.4960
2018-02-02 2017-12-31 13F MGIC INVT CORP WIS COM 552848103 2,344,581 40,019 1.74 33,082 14.57 2.1281
2017-10-25 2017-09-30 13F MGIC INVT CORP WIS COM 552848103 2,304,562 -69,373 -2.92 28,876 8.61 1.8669
2017-08-08 2017-06-30 13F MGIC INVT CORP WIS COM 552848103 2,373,935 0 0.00 26,588 10.56 1.7106
2017-05-01 2017-03-31 13F MGIC INVT CORP WIS COM 552848103 2,373,935 215,039 9.96 24,048 9.31 1.4667
2017-01-31 2016-12-31 13F MGIC INVT CORP WIS COM 552848103 2,158,896 575,646 36.36 21,999 73.69 1.2156
2016-11-04 2016-09-30 13F MGIC INVT CORP WIS COM 552848103 1,583,250 123,150 8.43 12,666 45.79 0.7271
2016-08-04 2016-06-30 13F MGIC INVT CORP WIS COM 552848103 1,460,100 667,200 84.15 8,688 42.85 0.4888
2016-05-03 2016-03-31 13F MGIC INVT CORP WIS COM 552848103 792,900 792,900 6,082 0.3190
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.