MGIC Investment Corporation
MX ˙ BMV ˙ US5528481030
SecurityMX:MTG / MGIC Investment Corporation
InstitutionGrantham, Mayo, Van Otterloo & Co. LLC
Latest Disclosed Ownership271,804 shares
Latest Disclosed Value $ 7,134,855
Grantham, Mayo, Van Otterloo & Co. LLC reports 35.06% decrease in ownership of MTG / MGIC Investment Corporation

On May 14, 2026 - Grantham, Mayo, Van Otterloo & Co. LLC filed a 13F-HR form disclosing ownership of 271,804 shares of MGIC Investment Corporation (MX:MTG) valued at $7,134,855 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 418,523 shares of MGIC Investment Corporation. This represents a change in shares of -35.06% 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)
2026-05-14 2026-03-31 13F MGIC INVT CORP WIS COM 552848103 271,804 -146,719 -35.06 7,135 -41.66 0.0182
2026-02-17 2025-12-31 13F MGIC INVT CORP WIS COM 552848103 418,523 -149,803 -26.36 12,229 -24.15 0.0313
2025-11-13 2025-09-30 13F MGIC INVT CORP WIS COM 552848103 568,326 -77,424 -11.99 16,123 -10.31 0.0455
2025-08-13 2025-06-30 13F MGIC INVT CORP WIS COM 552848103 645,750 -20,755 -3.11 17,978 8.85 0.0541
2025-05-14 2025-03-31 13F MGIC INVT CORP WIS COM 552848103 666,505 179,527 36.87 16,516 43.04 0.0521
2025-02-13 2024-12-31 13F MGIC INVT CORP WIS COM 552848103 486,978 -18,648 -3.69 11,546 -10.80 0.0376
2024-11-13 2024-09-30 13F MGIC INVT CORP WIS COM 552848103 505,626 -93,269 -15.57 12,944 0.29 0.0406
2024-08-13 2024-06-30 13F MGIC INVT CORP WIS COM 552848103 598,895 -3,364 -0.56 12,906 -4.16 0.0436
2024-05-14 2024-03-31 13F MGIC INVT CORP WIS COM 552848103 602,259 -26,754 -4.25 13,467 10.99 0.0489
2024-02-13 2023-12-31 13F MGIC INVT CORP WIS COM 552848103 629,013 213,795 51.49 12,134 75.10 0.0535
2023-11-13 2023-09-30 13F MGIC INVT CORP WIS COM 552848103 415,218 68,004 19.59 6,930 26.40 0.0327
2023-08-14 2023-06-30 13F MGIC INVT CORP WIS COM 552848103 347,214 280,214 418.23 5,483 509.79 0.0254
2023-05-12 2023-03-31 13F MGIC INVT CORP WIS COM 552848103 67,000 -102,400 -60.45 899 -59.17 0.0046
2023-02-13 2022-12-31 13F MGIC INVT CORP WIS COM 552848103 169,400 85,500 101.91 2,202 104.65 0.0117
2022-11-10 2022-09-30 13F MGIC INVT CORP WIS COM 552848103 83,900 58,200 226.46 1,076 232.10 0.0062
2022-08-12 2022-06-30 13F MGIC INVT CORP WIS COM 552848103 25,700 25,700 324 0.0018
2022-05-13 2022-03-31 13F MGIC INVT CORP WIS COM 552848103 0 -11,782 -100.00 0 -100.00
2022-02-11 2021-12-31 13F MGIC INVT CORP WIS COM 552848103 11,782 11,782 170 0.0008
2021-08-12 2021-06-30 13F MGIC INVT CORP WIS CO 552848103 0 -61,229 -100.00 0 -100.00
2021-05-13 2021-03-31 13F MGIC INVT CORP WIS CO 552848103 61,229 -530,338 -89.65 848 -88.58 0.0046
2021-02-12 2020-12-31 13F MGIC INVT CORP WIS COM 552848103 591,567 482,600 442.89 7,424 669.33 0.0456
2020-11-13 2020-09-30 13F MGIC INVT CORP WIS COM 552848103 108,967 74,100 212.52 965 237.41 0.0069
2020-08-13 2020-06-30 13F MGIC INVT CORP WIS COM 552848103 34,867 -29,900 -46.17 286 -30.41 0.0021
2020-05-14 2020-03-31 13F MGIC INVT CORP WIS COM 552848103 64,767 64,767 411 0.0034
2019-11-13 2019-09-30 13F MGIC INVT CORP WIS COM 552848103 0 -1,404,000 -100.00 0 -100.00
2019-08-13 2019-06-30 13F MGIC INVT CORP WIS COM 552848103 1,404,000 1,033,500 278.95 18,449 277.51 0.1298
2019-05-14 2019-03-31 13F MGIC INVT CORP WIS COM 552848103 370,500 370,500 4,887 0.0351
2018-08-14 2018-06-30 13F MGIC INVT CORP WIS COM 552848103 0 -12,700 -100.00 0 -100.00
2018-05-15 2018-03-31 13F MGIC INVT CORP WIS COM 552848103 12,700 -12,500 -49.60 165 -53.65 0.0010
2018-02-14 2017-12-31 13F MGIC INVT CORP WIS COM 552848103 25,200 0 0.00 356 12.66 0.0021
2017-11-14 2017-09-30 13F MGIC INVT CORP WIS COM 552848103 25,200 0 0.00 316 12.06 0.0018
2017-08-14 2017-06-30 13F MGIC INVT CORP WIS COM 552848103 25,200 -21,400 -45.92 282 -28.24 0.0016
2014-02-13 2013-12-31 13F MGIC INVT CORP WIS COM 552848103 46,600 -10,800 -18.82 393 -5.98 0.0010
2013-11-14 2013-09-30 13F MGIC INVT CORP WIS COM 552848103 57,400 57,400 418 0.0011
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.