Mediaalpha Inc. Class AMAX
13F holders, Q1 2025 (March 31)144holders −18
19new positions
37sold out
6famous investors
$9.24avg. 13F price*
At the end of Q1 2025, 144 institutions reported holding Mediaalpha Inc. Class A (MAX) in their 13F filings, down 18 from Q4 2024. 19 opened new positions and 37 sold out. The largest holders were White Mountains Insurance Group Ltd. ($165.0M), BlackRock, Inc. ($34.2M) and Vanguard Group Inc. ($26.9M). 6 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Mediaalpha Inc. Class A
- CUSIP
- 58450V104
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 19 | $4.1M |
| Exits | 37 | $35.9M |
All 13F filers, Q4 2024 → Q1 2025: 5,255,413 shares bought and 6,002,360 shares sold, net −746,947 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 144 holders
| White Mountains Insurance Group Ltd. | 57.70% | No change | 17,856,614 | $165.0M |
| BlackRock, Inc. | 0.00% | Add +4.0% | 3,697,726 | $34.2M |
| Vanguard Group Inc. | 0.00% | Reduce -19.6% | 2,913,328 | $26.9M |
| Broad Bay Capital Management, LP | 3.82% | Add +23.9% | 2,747,778 | $25.4M |
| Clearline Capital LP | 2.48% | Add +123.5% | 2,654,921 | $24.5M |
| TimesSquare Capital Management, LLC | 0.20% | Reduce -15.8% | 1,372,174 | $12.7M |
| Morgan Stanley | 0.00% | Add +20.8% | 737,921 | $6.8M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -8.5% | 736,531 | $6.8M |
| Geode Capital Management, LLC | 0.00% | Add +4.2% | 727,753 | $6.7M |
| D. E. Shaw & Co. | 0.01% | Add +77.3% | 670,691 | $6.2M |
| State Street Corp. | 0.00% | Add +2.9% | 623,787 | $5.8M |
| Millennium Management | 0.01% | Reduce -21.4% | 614,542 | $5.7M |
| Shay Capital LLC | 1.54% | Add +27.8% | 571,841 | $5.3M |
| J. Goldman & Co LP | 0.19% | Add +82.6% | 568,052 | $5.2M |
| Renaissance Technologies | 0.01% | Add +4.9% | 565,500 | $5.2M |
| AQR Capital Management | 0.01% | Add +18.1% | 557,796 | $5.2M |
| Nuveen, LLC | 0.00% | — | 505,907 | $4.7M |
| UBS Group AG | 0.00% | Add +21.3% | 504,850 | $4.7M |
| Qube Research & Technologies Ltd | 0.01% | Reduce -29.9% | 469,625 | $4.3M |
| Marshall Wace, LLP | 0.01% | Add +18.3% | 458,509 | $4.2M |
| Citadel Advisors | 0.00% | Add +177.5% | 430,239 | $4.0M |
| Jacobs Asset Management, LLC | 2.39% | Add +14.4% | 408,412 | $3.8M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -1.1% | 320,839 | $3.0M |
| Acadian Asset Management LLC | 0.01% | Reduce -27.8% | 321,302 | $3.0M |
| JPMorgan Chase & Co. | 0.00% | Add +151.9% | 308,298 | $2.8M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Reduce -61.2% | 296,054 | $2.7M |
| Northern Trust Corp. | 0.00% | Add +1.2% | 285,560 | $2.6M |
| Earnest Partners LLC | 0.01% | Add +12.8% | 272,433 | $2.5M |
| Algert Global LLC | 0.05% | Add +65.0% | 225,300 | $2.1M |
| Hillsdale Investment Management Inc. | 0.10% | Add +2.7% | 214,600 | $2.0M |
| Bank of America Corp. | 0.00% | Add +315.3% | 214,270 | $2.0M |
| Deutsche Bank AG | 0.00% | Add +80.6% | 180,691 | $1.7M |
| Susquehanna International Group, LLP | 0.00% | Add +437.6% | 168,032 | $1.6M |
| Allianz Asset Management GmbH | 0.00% | Reduce -2.8% | 161,772 | $1.5M |
| HRT Financial LP | 0.01% | Add +122.3% | 155,098 | $1.4M |
| Los Angeles Capital Management LLC | 0.01% | Add +17.8% | 148,521 | $1.4M |
| Lighthouse Investment Partners, LLC | 0.06% | Add +69.3% | 144,045 | $1.3M |
| ExodusPoint Capital Management, LP | 0.02% | Reduce -16.2% | 139,852 | $1.3M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Reduce -70.9% | 138,598 | $1.3M |
| Mariner, LLC | 0.00% | Add +126.3% | 136,787 | $1.3M |
| Two Sigma Investments, LP | 0.00% | Reduce -39.6% | 135,396 | $1.3M |
| Squarepoint Ops LLC | 0.00% | Reduce -13.4% | 134,557 | $1.2M |
| PDT Partners, LLC | 0.09% | New | 129,717 | $1.2M |
| Jane Street Group, LLC | 0.00% | Add +117.7% | 120,424 | $1.1M |
| Trexquant Investment LP | 0.01% | Reduce -20.3% | 111,223 | $1.0M |
| Sei Investments Co. | 0.00% | Reduce -9.8% | 103,905 | $960K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +1.6% | 90,865 | $840K |
| Bank of New York Mellon Corp | 0.00% | Reduce -0.3% | 89,654 | $828K |
| Balyasny Asset Management L.P. | 0.00% | New | 86,754 | $802K |
| Two Sigma Advisers, LP | 0.00% | Reduce -31.8% | 80,700 | $746K |
| Victory Capital Management Inc. | 0.00% | Reduce -9.8% | 77,192 | $713K |
| Graham Capital Management, L.P. | 0.03% | Add +15.1% | 73,945 | $683K |
| Swiss National Bank | 0.00% | Add +8.3% | 69,400 | $641K |
| Tudor Investment Corporation | 0.01% | New | 67,447 | $623K |
| Engineers Gate Manager LP | 0.01% | Add +27.1% | 65,084 | $601K |
| Blair William & Co. | 0.00% | Add +20.9% | 64,137 | $593K |
| Barclays PLC | 0.00% | Add +1.1% | 63,148 | $583K |
| Verition Fund Management LLC | 0.00% | Reduce -5.3% | 54,359 | $502K |
| AlphaQuest LLC | 0.05% | Add +2113.8% | 52,156 | $482K |
| HSBC Holdings PLC | 0.00% | Add +21.7% | 50,406 | $472K |
| Franklin Resources Inc. | 0.00% | Reduce -20.6% | 47,448 | $438K |
| Fox Run Management, L.L.C. | 0.07% | Add +1.0% | 47,269 | $437K |
| Citigroup Inc. | 0.00% | Add +60.0% | 45,067 | $416K |
| Cannell & Spears LLC | 0.01% | Reduce -3.3% | 44,200 | $408K |
| Dynamic Technology Lab Private Ltd | 0.06% | Reduce -5.4% | 43,176 | $399K |
| Rhumbline Advisers | 0.00% | Reduce -4.7% | 41,388 | $382K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -39.1% | 41,283 | $381K |
| Allspring Global Investments Holdings, LLC | 0.00% | Add +54.2% | 42,298 | $381K |
| BNP Paribas Financial Markets | 0.00% | Add +36.7% | 39,147 | $362K |
| Nebula Research & Development LLC | 0.03% | Reduce -7.5% | 37,106 | $343K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -27.6% | 35,937 | $332K |
| Gsa Capital Partners LLP | 0.03% | Reduce -2.5% | 31,027 | $287K |
| California State Teachers Retirement System | 0.00% | No change | 30,346 | $280K |
| Ieq Capital, LLC | 0.00% | Add +94.8% | 29,213 | $270K |
| Alliancebernstein L.P. | 0.00% | No change | 28,330 | $262K |
| Legal & General Group Plc | 0.00% | Reduce -0.3% | 28,086 | $260K |
| Stoneridge Investment Partners LLC | 0.22% | No change | 27,547 | $255K |
| Integrated Quantitative Investments LLC | 0.12% | Reduce -0.5% | 27,169 | $251K |
| Schonfeld Strategic Advisors LLC | 0.00% | Reduce -2.6% | 26,600 | $246K |
| Y-Intercept (Hong Kong) Ltd | 0.02% | Add +148.4% | 26,288 | $243K |
| Quantbot Technologies LP | 0.01% | Reduce -30.2% | 25,999 | $240K |
| Jain Global LLC | 0.00% | New | 23,603 | $218K |
| Campbell & CO Investment Adviser LLC | 0.02% | New | 21,671 | $200K |
| Royal Bank of Canada | 0.00% | Add +1747.9% | 21,491 | $198K |
| MetLife Investment Management, LLC | 0.00% | No change | 21,402 | $198K |
| T. Rowe Price Associates Inc. | 0.00% | No change | 20,236 | $187K |
| Teacher Retirement System of Texas | 0.00% | Reduce -46.9% | 19,947 | $184K |
| Virtus Advisers, LLC | 0.11% | New | 18,711 | $173K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +4.6% | 17,871 | $165K |
| Corton Capital Inc. | 0.53% | Reduce -54.7% | 17,440 | $161K |
| Intech Investment Management LLC | 0.00% | Add +39.8% | 17,397 | $161K |
| Sherbrooke Park Advisers LLC | 0.07% | Reduce -60.2% | 17,054 | $158K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | New | 16,749 | $155K |
| Cwm, LLC | 0.00% | Add +151.8% | 16,523 | $153K |
| Cerity Partners LLC | 0.00% | New | 16,235 | $150K |
| Polymer Capital Management (US) LLC | 0.04% | New | 15,394 | $142K |
| EntryPoint Capital, LLC | 0.06% | New | 14,879 | $137K |
| Corebridge Financial, Inc. | 0.00% | Add +0.1% | 14,859 | $137K |
| Wells Fargo & Company | 0.00% | Add +0.6% | 14,492 | $134K |
| LPL Financial LLC | 0.00% | Add +43.1% | 14,482 | $134K |
"% of holder's portfolio" is MAX's weight in each manager's 13F, not the share of Mediaalpha Inc. Class A the manager owns.