MERCURY GENL CORP NEW MCY
COM · Common Stock · CUSIP 589400100
Multiple-line American insurance organization
- SectorFinancials
- IndustryFire, Marine & Casualty Insurance
- HeadquartersLos Angeles, CA
- Founded1961
- Websitemercuryinsurance.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($8.9m this quarter). Holder counts are more reliable. Shares outstanding: 55.4m as of 2026-07-30, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $106.52. Options: 7 managers hold calls ($53.6m notional), 5 hold puts ($5.2m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 204 |
| Q4 2022 | 200 |
| Q1 2023 | 191 |
| Q2 2023 | 179 |
| Q3 2023 | 171 |
| Q4 2023 | 181 |
| Q1 2024 | 229 |
| Q2 2024 | 242 |
| Q3 2024 | 262 |
| Q4 2024 | 284 |
| Q1 2025 | 253 |
| Q2 2025 | 266 |
| Q3 2025 | 287 |
| Q4 2025 | 316 |
| Q1 2026 | 310 |
| Q2 2026 | 349 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 127 | 106 |
| Q4 2024 | 137 | 114 |
| Q1 2025 | 120 | 167 |
| Q2 2025 | 122 | 128 |
| Q3 2025 | 145 | 116 |
| Q4 2025 | 149 | 135 |
| Q1 2026 | 162 | 130 |
| Q2 2026 | 216 | 107 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $32.8m | $3.3m | 0.10 |
| Q4 2025 | $49.5m | $4.2m | 0.08 |
| Q1 2026 | $50.4m | $3.0m | 0.06 |
| Q2 2026 | $53.6m | $5.2m | 0.10 |
Biggest buyers
| GEODE CAPITAL MANAGEMENT, LLC | Added | +207.1k |
| BlackRock, Inc. | Added | +181.1k |
| PANAGORA ASSET MANAGEMENT INC | New | +152.0k |
| AMERICAN CENTURY COMPANIES INC | Added | +147.2k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Added | +83.0k |
| FRANKLIN RESOURCES INC | Added | +82.3k |
| Invesco Ltd. | Added | +73.6k |
| FEDERATED HERMES, INC. | Added | +68.8k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | +63.6k |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Added | +63.6k |
Biggest sellers
| Rubric Capital Management LP | Reduced | -613.1k |
| Philosophy Capital Management LLC | Sold out | -257.3k |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Reduced | -186.9k |
| Park West Asset Management LLC | Reduced | -137.1k |
| DG Capital Management, LLC | Reduced | -111.7k |
| CITADEL ADVISORS LLC | Sold out | -110.3k |
| JANE STREET GROUP, LLC | Sold out | -107.7k |
| MARSHALL WACE, LLP | Reduced | -91.1k |
| UBS Group AG | Reduced | -80.5k |
| TWO SIGMA INVESTMENTS, LP | Reduced | -78.5k |
Biggest calls
| DG Capital Management, LLC | Reduced | $35.6m333.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $10.2m95.3k shares |
| CITADEL ADVISORS LLC | Added | $3.3m30.6k shares |
| IMC-Chicago, LLC | Added | $3.1m29.1k shares |
| SIMPLEX TRADING, LLC | Reduced | $757.0k7.1k shares |
| GROUP ONE TRADING LLC | Reduced | $533.1k5.0k shares |
| JANE STREET GROUP, LLC | Reduced | $223.9k2.1k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $3.2m30.0k shares |
| IMC-Chicago, LLC | Added | $1.1m10.1k shares |
| CITADEL ADVISORS LLC | New | $916.9k8.6k shares |
| SIMPLEX TRADING, LLC | Reduced | $32.0k300 shares |
| GROUP ONE TRADING LLC | Reduced | $21.3k200 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
Joseph Vicky Wai Yee
13D · may seek influence
new · filed 2026-09-30
Stated purposeGeneral The Reporting Person intends to review her investments in the Issuer on a continuing basis. Any actions the Reporting Person might undertake may be made at any time and from time to time without prior notice and will be dependent upon the Reporting Person's review of numerous factors, including, but not limited to: an ongoing evaluation of the Issuer's business, financial condition, operations and prospects; price levels of the Issuer's securities; general market, industry and economic conditions; the relative attractiveness of alternative business and investment opportunities; and other future developments. The Reporting Person may acquire additional securities of the Issuer, or retain or sell all or a portion of the securities then held, in the open market or in privately negot… Full filing |
35.3% |
| BlackRock, Inc. 13G · institution filed 2025-04-17 | 7.3% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-27)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 1 | $83.2k | — |
| Q1 2025 | 1 | $3.6k | 0 | — | — |
| Q2 2025 | 2 | $992.1k | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 1 | $49.9k | 0 | — | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 4.5m $479.6m | Added +181.1k |
| DIMENSIONAL FUND ADVISORS LP 0.04% of their portfolio | 2.2m $230.6m | Added +13.5k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.01% of their portfolio | 1.8m $189.9m | Added +63.6k |
| Rubric Capital Management LP 1.51% of their portfolio | 1.5m $164.3m | Reduced -613.1k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 1.2m $131.4m | Added +6.2k |
| STATE STREET CORP 0.00% of their portfolio | 1.2m $123.7m | Added +60.9k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 961.2k $102.5m | Added +207.1k |
| AMERICAN CENTURY COMPANIES INC 0.05% of their portfolio | 960.5k $102.4m | Added +147.2k |
| RENAISSANCE TECHNOLOGIES LLC 0.11% of their portfolio | 781.7k $83.3m | Reduced -41.9k |
| Invesco Ltd. 0.01% of their portfolio | 646.2k $68.9m | Added +73.6k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.03% of their portfolio | 575.9k $61.4m | Added +980 |
| DG Capital Management, LLC 17.83% of their portfolio | 482.7k $51.5m | Reduced -111.7k |
| MORGAN STANLEY 0.00% of their portfolio | 400.7k $42.7m | Added +22.5k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 352.3k $37.6m | Reduced -5.0k |
| AQR CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 343.9k $36.7m | Reduced -7.5k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 291.1k $31.0m | Added +21.3k |
| Nuveen, LLC 0.01% of their portfolio | 264.5k $28.2m | Added +9.0k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 246.6k $26.3m | Added +3.1k |
| WESTWOOD HOLDINGS GROUP INC 0.19% of their portfolio | 234.5k $25.0m | Reduced -16.6k |
| UBS Group AG 0.00% of their portfolio | 226.7k $24.2m | Reduced -80.5k |
| TWO SIGMA INVESTMENTS, LP 0.02% of their portfolio | 210.5k $22.4m | Reduced -78.5k |
| ALGERT GLOBAL LLC 0.26% of their portfolio | 203.8k $21.7m | Added +33.6k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 203.7k $22.0m | Added +14.6k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 200.7k $21.4m | Added +7.6k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 183.7k $19.6m | Added +5.6k |
| BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio | 180.9k $19.3m | Reduced -36.8k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 178.8k $19.1m | Added +6.3k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.06% of their portfolio | 166.0k $17.7m | Reduced -186.9k |
| PANAGORA ASSET MANAGEMENT INC 0.05% of their portfolio | 152.0k $16.2m | New |
| FEDERATED HERMES, INC. 0.02% of their portfolio | 150.8k $16.1m | Added +68.8k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 129.3k $13.8m | Reduced -12.3k |
| Connor, Clark & Lunn Investment Management Ltd. 0.02% of their portfolio | 123.1k $13.1m | Reduced -10.6k |
| Baird Financial Group, Inc. 0.02% of their portfolio | 114.8k $12.2m | Reduced -30.8k |
| Allianz Asset Management GmbH 0.01% of their portfolio | 113.7k $10.0m | Added +66 |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 111.8k $11.9m | Added +1.6k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 110.9k $11.8m | Added +6.3k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.02% of their portfolio | 108.9k $11.6m | Added +83.0k |
| Public Sector Pension Investment Board 0.03% of their portfolio | 108.0k $11.5m | Added +12.9k |
| VICTORY CAPITAL MANAGEMENT INC 0.01% of their portfolio | 96.3k $10.3m | Added +10.9k |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.05% of their portfolio | 92.9k $9.9m | Added +18.9k |
| NORGES BANK 0.00% of their portfolio | 89.1k $9.5m | Not comparable |
| PEAK6 LLC 0.23% of their portfolio | 87.8k $9.4m | Added +13.5k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 86.6k $9.2m | Added +63.6k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 85.0k $9.1m | Added +82.3k |
| Candriam S.C.A. 0.04% of their portfolio | 85.0k $9.1m | Added +18.3k |
| DENALI ADVISORS LLC 0.88% of their portfolio | 81.5k $8.7m | Added +43.3k |
| Aptus Capital Advisors, LLC 0.06% of their portfolio | 80.2k $8.6m | Added +480 |
| Qube Research & Technologies Ltd 0.01% of their portfolio | 73.6k $7.8m | Reduced -45.5k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 71.8k $7.7m | Added +9.6k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 69.6k $7.4m | Reduced -5.3k |
| Legal & General Group Plc 0.00% of their portfolio | 68.9k $7.3m | Reduced -4.3k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 64.0k $6.8m | Reduced -7.5k |
| Philadelphia Financial Management of San Francisco, LLC 1.85% of their portfolio | 63.2k $6.7m | New |
| PRUDENTIAL FINANCIAL INC 0.01% of their portfolio | 61.4k $6.5m | Added +1.4k |
| CITIGROUP INC 0.00% of their portfolio | 60.0k $6.4m | Added +19.5k |
| Lighthouse Investment Partners, LLC 0.19% of their portfolio | 56.1k $6.0m | Added +52.5k |
| Park West Asset Management LLC 0.41% of their portfolio | 55.9k $6.0m | Reduced -137.1k |
| LSV ASSET MANAGEMENT 0.01% of their portfolio | 55.7k $5.9m | Unchanged |
| Swiss National Bank 0.00% of their portfolio | 55.6k $5.9m | Added +900 |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 55.2k $5.9m | Reduced -27.2k |
| RITHOLTZ WEALTH MANAGEMENT 0.08% of their portfolio | 53.4k $5.7m | Added +12.9k |
| MARTINGALE ASSET MANAGEMENT L P 0.13% of their portfolio | 51.6k $5.5m | Added +8.4k |
| IEQ CAPITAL, LLC 0.03% of their portfolio | 50.9k $5.4m | Reduced -9.6k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 50.9k $5.4m | Reduced -32.6k |
| Trexquant Investment LP 0.03% of their portfolio | 48.5k $5.2m | Reduced -4.2k |
| Horizon Investments, LLC 0.05% of their portfolio | 47.0k $5.0m | Added +8.6k |
| GLOBEFLEX CAPITAL L P 0.63% of their portfolio | 46.0k $4.9m | Added +13.8k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 45.5k $4.9m | Reduced -91.1k |
| Engineers Gate Manager LP 0.06% of their portfolio | 43.5k $4.6m | Reduced -2.6k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.02% of their portfolio | 42.0k $4.5m | Reduced -43.6k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 40.4k $3.6m | Added +5.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 40.1k $4.3m | Added +5.6k |
| Thrivent Financial for Lutherans 0.01% of their portfolio | 39.8k $4.2m | Added +20.3k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 39.7k $4.2m | Added +7 |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 39.3k $4.2m | Added +15.3k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 37.8k $4.0m | Added +19.3k |
| ROYCE & ASSOCIATES LP 0.03% of their portfolio | 35.3k $3.8m | Added +13.0k |
| LEUTHOLD GROUP, LLC 0.37% of their portfolio | 34.3k $3.7m | New |
| Phocas Financial Corp. 0.50% of their portfolio | 33.6k $3.6m | New |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 32.9k $3.5m | Reduced -911 |
| Assenagon Asset Management S.A. 0.00% of their portfolio | 32.6k $3.5m | Reduced -47.5k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 32.0k $3.4m | Added +14.1k |
| Proficio Capital Partners LLC 0.12% of their portfolio | 31.8k $3.4m | Added +4.8k |
| HUSSMAN STRATEGIC ADVISORS, INC. 0.77% of their portfolio | 31.5k $3.4m | Added +10.5k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 31.1k $3.3m | Added +4.3k |
| OCCUDO QUANTITATIVE STRATEGIES LP 0.17% of their portfolio | 30.4k $3.2m | New |
| ZACKS INVESTMENT MANAGEMENT 0.02% of their portfolio | 30.4k $3.2m | New |
| FMR LLC 0.00% of their portfolio | 28.2k $3.0m | Added +1.0k |
| Inspire Investing, LLC 0.12% of their portfolio | 28.1k $3.0m | Added +4.1k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.05% of their portfolio | 27.7k $3.0m | Unchanged |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 27.0k $2.9m | Added +3.0k |
| DARK FOREST CAPITAL MANAGEMENT LP 0.18% of their portfolio | 26.7k $2.9m | Added +20.8k |
| Monument Capital Management 0.57% of their portfolio | 26.5k $2.8m | New |
| VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio | 25.9k $2.8m | Added +1.8k |
| CANADA LIFE ASSURANCE Co 0.00% of their portfolio | 25.3k $2.7m | Reduced -614 |
| Integrated Quantitative Investments LLC 0.42% of their portfolio | 23.9k $2.6m | New |
| Mariner, LLC 0.00% of their portfolio | 23.7k $2.5m | Reduced -1.7k |
| Walleye Trading LLC 0.04% of their portfolio | 23.7k $2.5m | Added +15.6k |
| Cerity Partners LLC 0.00% of their portfolio | 21.4k $2.3m | Added +289 |
| IMC-Chicago, LLC 0.02% of their portfolio | 21.3k $2.3m | Added +14.7k |