MGIC Investment Corporation
MX ˙ BMV ˙ US5528481030
SecurityMX:MTG / MGIC Investment Corporation
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership15,800 shares
Latest Disclosed Value $ 414,750
Marshall Wace, Llp ownership in MTG / MGIC Investment Corporation

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 15,800 shares of MGIC Investment Corporation (MX:MTG) valued at $414,750 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 0 shares of MGIC Investment Corporation.

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)
2026-05-14 2026-03-31 13F MGIC INVT COMMON STOCK 552848103 15,800 15,800 415 0.0002
2026-02-13 2025-12-31 13F MGIC INVT COMMON STOCK 552848103 0 -8,823 -100.00 0 -100.00
2025-11-13 2025-09-30 13F MGIC INVT COMMON STOCK 552848103 8,823 8,823 250 0.0003
2023-02-14 2022-12-31 13F MGIC INVT COMMON STOCK 552848103 0 -21,590 -100.00 0 -100.00
2022-11-14 2022-09-30 13F MGIC INVT COMMON STOCK 552848103 21,590 21,590 277 0.0006
2021-11-15 2021-09-30 13F MGIC INVT COMMON STOCK 552848103 0 -1,400,000 -100.00 0 -100.00
2021-08-13 2021-06-30 13F MGIC INVT COMMON STOCK 552848103 1,400,000 1,400,000 19,040 0.0928
2021-02-16 2020-12-31 13F MGIC INVT COMMON STOCK 552848103 0 -16,623 -100.00 0 -100.00
2020-11-16 2020-09-30 13F MGIC INVT COMMON STOCK 552848103 16,623 -6,533 -28.21 147 -22.63 0.0009
2020-08-13 2020-06-30 13F MGIC INVT COMMON STOCK 552848103 23,156 -111,422 -82.79 190 -77.78 0.0013
2020-05-15 2020-03-31 13F MGIC INVT COMMON STOCK 552848103 134,578 -1,756,119 -92.88 855 -96.81 0.0085
2020-02-14 2019-12-31 13F MGIC INVT COMMON STOCK 552848103 1,890,697 282,301 17.55 26,791 32.41 0.1841
2019-11-14 2019-09-30 13F MGIC INVT COMMON STOCK 552848103 1,608,396 1,608,396 -14.93 20,234 -24.47 0.1591
2019-08-14 2019-06-30 13F MGIC INVT COMMON STOCK 552848103 0 -432,745 -100.00 0 -100.00
2019-05-29 2019-03-31 13F/A-1 MGIC INVT COMMON STOCK 552848103 432,745 134,290 45.00 5,708 82.83 0.0537
2019-05-14 2019-03-31 13F MGIC INVT COMMON STOCK 552848103 432,745 134,290 5,708
2019-02-14 2018-12-31 13F MGIC INVT COMMON STOCK 552848103 298,455 207,298 227.41 3,122 157.38 0.0319
2018-12-06 2018-09-30 13F/A-1 MGIC INVT COMMON STOCK 552848103 91,157 0 0.00 1,213 24.16 0.0103
2018-11-14 2018-09-30 13F MGIC INVT COMMON STOCK 552848103 91,157 0 1,213
2018-08-14 2018-06-30 13F MGIC INVT COMMON STOCK 552848103 91,157 91,157 0.00 977 -19.46 0.0146
2017-05-12 2017-03-31 13F MGIC INVT COMMON STOCK 552848103 0 -5,432,113 -100.00 0 -100.00
2017-02-10 2016-12-31 13F MGIC INVT COMMON STOCK 552848103 5,432,113 -858,932 -13.65 55,353 9.98 0.3639
2016-11-10 2016-09-30 13F MGIC INVT COMMON STOCK 552848103 6,291,045 -1,011,533 -13.85 50,329 15.83 0.3578
2016-08-12 2016-06-30 13F MGIC INVT COMMON STOCK 552848103 7,302,578 858,282 13.32 43,450 -12.09 0.3653
2016-05-13 2016-03-31 13F MGIC INVT COMMON STOCK 552848103 6,444,296 -2,393,997 -27.09 49,427 -36.67 0.4763
2016-02-10 2015-12-31 13F MGIC INVT COMMON STOCK 552848103 8,838,293 2,760,757 45.43 78,042 38.67 0.7323
2015-11-12 2015-09-30 13F MGIC INVT COMMON STOCK 552848103 6,077,536 1,693,466 38.63 56,278 12.80 0.6914
2015-08-14 2015-06-30 13F MGIC INVT COMMON STOCK 552848103 4,384,070 408,803 10.28 49,891 30.32 0.6508
2015-05-11 2015-03-31 13F MGIC INVT COMMON STOCK 552848103 3,975,267 2,450,658 160.74 38,282 169.42 0.4988
2015-02-17 2014-12-31 13F MGIC INVT COMMON STOCK 552848103 1,524,609 1,346,740 757.15 14,209 922.97 0.1876
2014-11-13 2014-09-30 13F MGIC INVT COMMON STOCK 552848103 177,869 -2,941,996 -94.30 1,389 -95.18 0.0200
2014-08-14 2014-06-30 13F MGIC INVT COMMON STOCK 552848103 3,119,865 -153,127 -4.68 28,828 3.38 0.4244
2014-05-14 2014-03-31 13F MGIC INVT COMMON STOCK 552848103 3,272,992 3,272,992 27,886 0.5072
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.