MGIC Investment Corporation
US ˙ NYSE ˙ US5528481030

SecurityMTG / MGIC Investment Corporation
InstitutionCss Llc/il
Latest Disclosed Ownership38,701 shares
Latest Disclosed Value $ 1,015,901
Css Llc/il ownership in MTG / MGIC Investment Corporation

On May 15, 2026 - Css Llc/il filed a 13F-HR form disclosing ownership of 38,701 shares of MGIC Investment Corporation (US:MTG) valued at $1,015,901 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 27,611 shares of MGIC Investment Corporation. This represents a change in shares of 40.17% during the quarter. The current value of the position is $962,107 USD.

Css Llc/il has a history of taking positions in derivatives of the underlying security (MTG) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MTG / MGIC Investment Corporation Historical Put/Call Ratio
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)
2026-05-15 2026-03-31 13F MGIC INVT CORP WIS COM 552848103 38,701 11,090 40.17 1,016 25.93 0.0487
2026-02-17 2025-12-31 13F MGIC INVT CORP WIS COM 552848103 27,611 4,144 17.66 807 21.20 0.0359
2025-11-13 2025-09-30 13F MGIC INVT CORP WIS COM 552848103 23,467 23,467 666 0.0299
2025-08-14 2025-06-30 13F MGIC INVT CORP WIS COM 552848103 0 -22,070 -100.00 0 -100.00
2025-05-15 2025-03-31 13F MGIC INVT CORP WIS COM 552848103 22,070 22,070 547 0.0300
2022-11-14 2022-09-30 13F MGIC INVT CORP WIS COM 552848103 0 -44,069 -100.00 0 -100.00
2022-08-15 2022-06-30 13F MGIC INVT CORP WIS COM 552848103 44,069 0 0.00 555 -7.04 0.0226
2022-05-16 2022-03-31 13F MGIC INVT CORP WIS COM 552848103 44,069 0 0.00 597 -5.98 0.0216
2022-02-14 2021-12-31 13F MGIC INVT CORP WIS COM 552848103 44,069 0 0.00 635 -3.64 0.0226
2021-11-15 2021-09-30 13F MGIC INVT CORP WIS COM 552848103 44,069 0 0.00 659 10.02 0.0280
2021-08-16 2021-06-30 13F MGIC INVT CORP WIS COM 552848103 44,069 -5,059 -10.30 599 -11.91 0.0248
2021-05-17 2021-03-31 13F MGIC INVT CORP WIS COM 552848103 49,128 49,128 680 0.0280
2018-11-14 2018-09-30 13F MGIC INVT CORP WIS COM 552848103 0 -11,400 -100.00 0 -100.00
2018-08-14 2018-06-30 13F MGIC INVT CORP WIS COM 552848103 11,400 11,400 122 0.0057
2015-02-17 2014-12-31 13F MGIC INVT CORP WIS COM 552848103 0 -37,793 -100.00 0 -100.00
2014-11-14 2014-09-30 13F MGIC INVT CORP WIS COM 552848103 37,793 -3,000 -7.35 295 -21.75 0.0143
2014-08-14 2014-06-30 13F MGIC INVT CORP WIS COM 552848103 40,793 0 0.00 377 8.33 0.0156
2014-05-15 2014-03-31 13F MGIC INVT CORP WIS COM 552848103 40,793 -45,800 -52.89 348 -52.39 0.0175
2014-02-14 2013-12-31 13F MGIC INVT CORP WIS COM 552848103 86,593 86,593 731 0.0351
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2014-05-15 2014-03-31 13F MGIC INVT CORP WIS CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2014-02-14 2013-12-31 13F MGIC INVT CORP WIS CALL Call 16,400 138 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2014-05-15 2014-03-31 13F MGIC INVT CORP WIS PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2014-02-14 2013-12-31 13F MGIC INVT CORP WIS PUT Put 92,400 780 n/a n/a n/a
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.