Mediaalpha Inc. Class AMAX
13F holders, Q2 2026 (June 30)153holders −10
20new positions
28sold out
6famous investors
$12.55avg. 13F price*
At the end of Q2 2026, 153 institutions reported holding Mediaalpha Inc. Class A (MAX) in their 13F filings, down 10 from Q1 2026. 20 opened new positions and 28 sold out. The largest holders were White Mountains Insurance Group Ltd. ($224.5M), BlackRock, Inc. ($42.6M) and Clearline Capital LP ($34.1M). 6 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Mediaalpha Inc. Class A
- CUSIP
- 58450V104
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 20 | $12.0M |
| Exits | 28 | $12.2M |
All 13F filers, Q1 2026 → Q2 2026: 4,615,696 shares bought and 4,379,447 shares sold, net +236,249 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 153 holders
| White Mountains Insurance Group Ltd. | 57.03% | No change | 17,856,614 | $224.5M |
| BlackRock, Inc. | 0.00% | Reduce -2.4% | 3,392,357 | $42.6M |
| Clearline Capital LP | 2.20% | Add +4.8% | 2,713,890 | $34.1M |
| JPMorgan Chase & Co. | 0.00% | Add +7.7% | 1,880,062 | $23.3M |
| Vanguard Capital Management LLC | 0.00% | Reduce -7.9% | 1,276,369 | $16.0M |
| Geode Capital Management, LLC | 0.00% | Reduce -0.2% | 1,068,308 | $13.4M |
| Divisadero Street Capital Management, LP | 0.30% | Add +1073.7% | 1,019,988 | $12.8M |
| Jacobs Levy Equity Management, Inc. | 0.04% | Add +29.5% | 971,232 | $12.2M |
| Acadian Asset Management LLC | 0.01% | Add +13.0% | 957,095 | $12.0M |
| Jacobs Asset Management, LLC | 8.71% | Reduce -0.5% | 919,761 | $11.6M |
| State Street Corp. | 0.00% | Add +2.9% | 862,235 | $10.8M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Reduce -21.9% | 829,958 | $10.4M |
| Morgan Stanley | 0.00% | Add +16.8% | 821,170 | $10.3M |
| Nuveen, LLC | 0.00% | Add +7.3% | 752,447 | $9.5M |
| Dimensional Fund Advisors LP | 0.00% | Add +13.1% | 701,914 | $8.8M |
| J. Goldman & Co LP | 0.26% | Reduce -49.4% | 598,070 | $7.5M |
| Citadel Advisors | 0.00% | Add +157.2% | 589,696 | $7.4M |
| Renaissance Technologies | 0.01% | Reduce -20.1% | 574,407 | $7.2M |
| Shay Capital LLC | 0.79% | Reduce -26.4% | 570,000 | $7.2M |
| Jane Street Group, LLC | 0.00% | Add +94.9% | 551,625 | $6.9M |
| D. E. Shaw & Co. | 0.00% | Add +56.7% | 535,926 | $6.7M |
| Speece Thorson Capital Group Inc. | 1.31% | Reduce -2.0% | 489,098 | $6.1M |
| EVR Research LP | 2.73% | New | 440,000 | $5.5M |
| Vanguard Portfolio Management LLC | 0.00% | Reduce -20.8% | 433,046 | $5.4M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -31.2% | 428,866 | $5.4M |
| Two Sigma Investments, LP | 0.00% | Add +133.6% | 409,480 | $5.1M |
| AQR Capital Management | 0.00% | Reduce -18.7% | 391,641 | $4.9M |
| HRT Financial LP | 0.01% | Add +13.2% | 372,929 | $4.7M |
| Bank of America Corp. | 0.00% | Add +32.9% | 371,840 | $4.7M |
| Triad Investment Management | 5.11% | Add +10.4% | 368,731 | $4.6M |
| Stoic Point Capital Management LLC | 3.14% | Add +34.4% | 297,150 | $3.7M |
| Northern Trust Corp. | 0.00% | Reduce -1.7% | 267,107 | $3.4M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -5.5% | 259,224 | $3.3M |
| Squarepoint Ops LLC | 0.01% | Add +8.7% | 234,255 | $2.9M |
| Vanguard Fiduciary Trust Co. | 0.00% | Reduce -1.4% | 223,917 | $2.8M |
| Teacher Retirement System of Texas | 0.01% | Add +16.8% | 216,405 | $2.7M |
| BNP Paribas Financial Markets | 0.00% | Add +272.2% | 209,204 | $2.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -0.2% | 180,171 | $2.3M |
| XTX Topco Ltd | 0.03% | Add +17.3% | 172,269 | $2.2M |
| Algert Global LLC | 0.03% | Add +102.2% | 170,870 | $2.1M |
| Man Group plc | 0.00% | Add +14.7% | 156,754 | $2.0M |
| Alliancebernstein L.P. | 0.00% | Add +2.9% | 211,450 | $2.0M |
| Principal Financial Group Inc. | 0.00% | Add +8.2% | 148,845 | $1.9M |
| Quantinno Capital Management LP | 0.00% | Add +26.8% | 136,034 | $1.7M |
| Russell Investments Group, Ltd. | 0.00% | Add +53.6% | 130,360 | $1.6M |
| Stifel Financial Corp. | 0.00% | New | 126,175 | $1.6M |
| Victory Capital Management Inc. | 0.00% | Add +16.1% | 101,365 | $1.3M |
| Balyasny Asset Management L.P. | 0.00% | Reduce -7.1% | 101,046 | $1.3M |
| Qube Research & Technologies Ltd | 0.00% | Reduce -77.7% | 92,453 | $1.2M |
| PDT Partners, LLC | 0.06% | Reduce -6.7% | 84,022 | $1.1M |
| Bank of New York Mellon Corp | 0.00% | Reduce -6.3% | 81,504 | $1.0M |
| Walleye Capital LLC | 0.01% | New | 80,306 | $1.0M |
| Franklin Resources Inc. | 0.00% | Reduce -78.3% | 74,587 | $938K |
| Amundi | 0.00% | Reduce -10.0% | 70,311 | $884K |
| State of Wisconsin Investment Board | 0.00% | Reduce -33.8% | 70,309 | $884K |
| Allianz Asset Management GmbH | 0.00% | No change | 70,176 | $882K |
| Winmill & Co. Inc. | 0.18% | New | 65,102 | $818K |
| Swiss National Bank | 0.00% | Add +3.6% | 60,800 | $764K |
| Blair William & Co. | 0.00% | Add +0.1% | 56,046 | $704K |
| Globeflex Capital L P | 0.09% | Reduce -30.4% | 55,850 | $702K |
| Campbell & CO Investment Adviser LLC | 0.03% | Add +189.8% | 46,617 | $586K |
| Rhumbline Advisers | 0.00% | Reduce -4.1% | 45,932 | $577K |
| Hillsdale Investment Management Inc. | 0.01% | New | 45,900 | $577K |
| Allspring Global Investments Holdings, LLC | 0.00% | Reduce -6.4% | 44,831 | $564K |
| Sei Investments Co. | 0.00% | Add +24.9% | 44,637 | $561K |
| Mariner, LLC | 0.00% | Reduce -29.7% | 41,127 | $517K |
| Caption Management, LLC | 0.02% | Reduce -74.8% | 37,515 | $472K |
| T. Rowe Price Associates Inc. | 0.00% | No change | 37,076 | $467K |
| Millennium Management | 0.00% | Reduce -21.2% | 37,065 | $466K |
| Deutsche Bank AG | 0.00% | Reduce -2.4% | 34,254 | $431K |
| Lighthouse Investment Partners, LLC | 0.01% | New | 34,001 | $427K |
| UBS Group AG | 0.00% | Reduce -78.2% | 33,602 | $422K |
| Barclays PLC | 0.00% | Reduce -33.1% | 30,349 | $381K |
| Wells Fargo & Company | 0.00% | Add +128.5% | 28,163 | $354K |
| Legal & General Group Plc | 0.00% | No change | 27,533 | $346K |
| Brevan Howard Capital Management LP | 0.01% | New | 27,117 | $341K |
| Dynamic Technology Lab Private Ltd | 0.08% | Reduce -38.4% | 26,868 | $338K |
| FMR LLC | 0.00% | Reduce -2.9% | 26,386 | $332K |
| Invesco Ltd. | 0.00% | Add +10.2% | 26,039 | $327K |
| State of Alaska, Department of Revenue | 0.00% | Add +1288.9% | 25,862 | $324K |
| Tudor Investment Corporation | 0.00% | New | 25,748 | $324K |
| Allstate Corp. | 0.00% | New | 25,287 | $318K |
| Axq Capital, LP | 0.03% | New | 25,117 | $316K |
| Abel Hall, LLC | 0.05% | Reduce -3.7% | 24,473 | $308K |
| California State Teachers Retirement System | 0.00% | Reduce -4.4% | 24,141 | $303K |
| Citigroup Inc. | 0.00% | Add +140.6% | 24,003 | $302K |
| Corient Private Wealth LP | 0.00% | Add +50.7% | 23,451 | $295K |
| Susquehanna International Group, LLP | 0.00% | Reduce -87.8% | 23,247 | $292K |
| Quantbot Technologies LP | 0.01% | Reduce -25.9% | 21,568 | $271K |
| MetLife Investment Management, LLC | 0.00% | No change | 21,402 | $269K |
| Jupiter Asset Management Ltd. | 0.00% | No change | 21,172 | $266K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | No change | 18,642 | $234K |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | No change | 17,425 | $219K |
| Graham Capital Management, L.P. | 0.01% | Add +18.1% | 17,179 | $216K |
| Mercer Global Advisors Inc. | 0.00% | Add +2.7% | 16,595 | $209K |
| Creative Planning | 0.00% | Reduce -18.7% | 16,220 | $204K |
| Nomura Holdings Inc. | 0.00% | New | 16,058 | $202K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Reduce -29.2% | 14,811 | $198K |
| Ieq Capital, LLC | 0.00% | Reduce -53.3% | 15,367 | $193K |
| EP Wealth Advisors, LLC | 0.00% | New | 15,273 | $192K |
"% of holder's portfolio" is MAX's weight in each manager's 13F, not the share of Mediaalpha Inc. Class A the manager owns.