Mercury General Corporation
US ˙ NYSE ˙ US5894001008

SecurityMCY / Mercury General Corporation
InstitutionSei Investments Co
Latest Disclosed Ownership146,446 shares
Latest Disclosed Value $ 13,774,701
Sei Investments Co ownership in MCY / Mercury General Corporation

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 146,446 shares of Mercury General Corporation (US:MCY) valued at $13,774,711 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 154,436 shares of Mercury General Corporation. This represents a change in shares of -5.17% during the quarter. The current value of the position is $14,167,186 USD.

Sei Investments Co has a history of taking positions in derivatives of the underlying security (MCY) in the form of stock options.

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.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

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.

MCY / Mercury General 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)
2026-02-13 2025-12-31 13F MERCURY GENL CORP COM 589400100 146,446 -7,990 -5.17 13,775 5.20 0.0136
2025-11-13 2025-09-30 13F MERCURY GENL CORP COM 589400100 154,436 -3,457 -2.19 13,093 23.15 0.0141
2025-08-14 2025-06-30 13F MERCURY GENL CORP COM 589400100 157,893 43,401 37.91 10,633 66.13 0.0123
2025-05-14 2025-03-31 13F/A-1 MERCURY GENL CORP COM 589400100 114,492 108,451 1,795.25 6,400 1,496.01 0.0082
2025-05-13 2025-03-31 13F MERCURY GENL CORP COM 589400100 6,041 0 401 0.0004
2025-02-11 2024-12-31 13F MERCURY GENL CORP COM 589400100 6,041 -5,916 -49.48 402 -46.75 0.0005
2024-11-12 2024-09-30 13F MERCURY GENL CORP COM 589400100 11,957 7,110 146.69 753 193.00 0.0010
2024-08-13 2024-06-30 13F MERCURY GENL CORP COM 589400100 4,847 -12,714 -72.40 258 -71.63 0.0004
2024-05-07 2024-03-31 13F MERCURY GENL CORP COM 589400100 17,561 10,014 132.69 906 222.42 0.0013
2024-02-14 2023-12-31 13F MERCURY GENL CORP COM 589400100 7,547 0 0.00 282 33.18 0.0005
2023-11-14 2023-09-30 13F MERCURY GENL CORP COM 589400100 7,547 0 0.00 212 -7.46 0.0004
2023-08-11 2023-06-30 13F MERCURY GENL CORP COM 589400100 7,547 900 13.54 228 8.57 0.0004
2023-05-12 2023-03-31 13F MERCURY GENL CORP COM 589400100 6,647 733 12.39 211 3.96 0.0004
2023-02-10 2022-12-31 13F MERCURY GENL CORP COM 589400100 5,914 5,914 202 0.0004
2022-08-15 2022-06-30 13F MERCURY GENL CORP COM 589400100 0 -9,953 -100.00 0 -100.00
2022-05-13 2022-03-31 13F MERCURY GENL CORP COM 589400100 9,953 -4,212 -29.74 529 -32.61 0.0011
2022-02-14 2021-12-31 13F MERCURY GENL CORP COM 589400100 14,165 -56 -0.39 785 -10.29 0.0015
2021-11-12 2021-09-30 13F MERCURY GENL CORP COM 589400100 14,221 -30 -0.21 875 -13.28 0.0018
2021-08-06 2021-06-30 13F MERCURY GENL CORP COM 589400100 14,251 -2,836 -16.60 1,009 7.45 0.0022
2021-05-12 2021-03-31 13F MERCURY GENL CORP COM 589400100 17,087 -4,768 -21.82 939 -20.96 0.0024
2021-02-08 2020-12-31 13F MERCURY GENL CORP COM 589400100 21,855 638 3.01 1,188 32.59 0.0031
2020-12-04 2020-09-30 13F/A-1 MERCURY GENL CORP COM 589400100 21,217 21,217 896 0.0026
2020-11-06 2020-09-30 13F MERCURY GENL CORP COM 589400100 21,640 21,640 913 2,198.3010
2019-08-14 2019-06-30 13F MERCURY GENL CORP COM 589400100 0 -145 -100.00 0 -100.00
2019-05-15 2019-03-31 13F MERCURY GENL CORP COM 589400100 145 -3,332 -95.83 7 -96.43 0.0000
2019-02-13 2018-12-31 13F MERCURY GENL CORP COM 589400100 3,477 3,477 196 0.0007
2018-11-08 2018-09-30 13F MERCURY GENL CORP COM 589400100 0 -298 -100.00 0 -100.00
2018-08-03 2018-06-30 13F MERCURY GENL CORP COM 589400100 298 -119 -28.54 13 -31.58 0.0000
2018-05-11 2018-03-31 13F MERCURY GENL CORP COM 589400100 417 -897 -68.26 19 -72.86 0.0001
2018-02-08 2017-12-31 13F MERCURY GENL CORP COM 589400100 1,314 469 55.50 70 45.83 0.0002
2017-11-06 2017-09-30 13F MERCURY GENL CORP COM 589400100 845 113 15.44 48 20.00 0.0002
2017-07-31 2017-06-30 13F MERCURY GENL CORP COM 589400100 732 -9 -1.21 40 -11.11 0.0002
2017-05-05 2017-03-31 13F MERCURY GENL CORP COM 589400100 741 162 27.98 45 32.35 0.0002
2017-02-02 2016-12-31 13F MERCURY GENL CORP COM 589400100 579 -31 -5.08 34 3.03 0.0002
2016-11-04 2016-09-30 13F MERCURY GENL CORP COM 589400100 610 -1,258 -67.34 33 -67.00 0.0002
2016-08-11 2016-06-30 13F MERCURY GENL CORP COM 589400100 1,868 721 62.86 100 56.25 0.0006
2016-05-10 2016-03-31 13F/A-1 MERCURY GENL CORP COM 589400100 1,147 453 65.27 64 100.00 0.0004
2016-02-03 2015-12-31 13F MERCURY GENL CORP COM 589400100 694 -113 -14.00 32 -21.95 0.0002
2015-11-02 2015-09-30 13F/A-1 MERCURY GENL CORP COM 589400100 807 -21 -2.54 41 -10.87 0.0004
2015-10-30 2015-09-30 13F MERCURY GENL CORP COM 589400100 807 41
2015-08-07 2015-06-30 13F/A-1 MERCK & CO INC PUT 589400100 0 -806 -100.00 0 -100.00
2015-08-07 2015-06-30 13F/A-1 MERCK & CO INC PUT 589400100 0 -806 -100.00 0 -100.00
2015-08-07 2015-06-30 13F/A-1 MERCURY GENL CORP COM 589400100 828 22 2.73 46 -2.13 0.0004
2015-08-04 2015-06-30 13F MERCURY GENL CORP COM 589400100 828 22 46 0.0004
2015-05-14 2015-03-31 13F/A-1 MERCURY GENL CORP COM 589400100 806 -65 -7.46 47 -2.08 0.0004
2015-05-01 2015-03-31 13F MERCK & CO INC PUT 589400100 806 806 47 0.0004
2015-02-10 2014-12-31 13F MERCURY GENL CORP COM 589400100 871 871 48 0.0004
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
(%)
2015-08-07 2015-06-30 13F/A MERCK & CO INC PUT 0 -100.00 0 -100.00 n/a n/a n/a
2015-08-07 2015-06-30 13F/A MERCK & CO INC PUT 0 -100.00 0 -100.00 n/a n/a n/a
2015-05-01 2015-03-31 13F MERCK & CO INC PUT 806 47 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.