MEDIAALPHA INC (MAX)
Institutional ownership reported to the SEC as of Q2 2026, across 24 quarters.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| WHITE MOUNTAINS INSURANCE GROUP LTD | $224.5M | 17,856,614 | 57.03% | 23q | HELD |
| BlackRock, Inc. | $42.6M | 3,392,357 | 0.00% | 8q | -2.4%-$1.1M |
| Clearline Capital LP | $34.1M | 2,713,890 | 2.04% | 13q | +4.8%+$1.5M |
| JPMORGAN CHASE & CO | $23.3M | 1,880,062 | 0.00% | 23q | +7.7%+$1.7M |
| VANGUARD CAPITAL MANAGEMENT LLC | $16.0M | 1,276,369 | 0.00% | 2q | -7.9%-$1.4M |
| GEODE CAPITAL MANAGEMENT, LLC | $13.4M | 1,068,308 | 0.00% | 23q | HELD |
| Divisadero Street Capital Management, LP | $12.8M | 1,019,988 | 0.29% | 5q | +1073.7%+$11.7M |
| JACOBS LEVY EQUITY MANAGEMENT, INC | $12.2M | 971,232 | 0.04% | 9q | +29.5%+$2.8M |
| ACADIAN ASSET MANAGEMENT LLC | $12.0M | 957,095 | 0.01% | 10q | +13.0%+$1.4M |
| JACOBS ASSET MANAGEMENT, LLC | $11.6M | 919,761 | 7.27% | 19q | -0.5%-$58.9K |
| STATE STREET CORP | $10.8M | 862,235 | 0.00% | 23q | +2.9%+$302.6K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $10.4M | 829,958 | 0.00% | 15q | -21.8%-$2.9M |
| MORGAN STANLEY | $10.3M | 821,170 | 0.00% | 23q | +16.8%+$1.5M |
| Nuveen, LLC | $9.5M | 752,447 | 0.00% | 6q | +7.3%+$641.7K |
| DIMENSIONAL FUND ADVISORS LP | $8.8M | 701,914 | 0.00% | 5q | +13.1%+$1.0M |
| J. Goldman & Co LP | $8.6M incl. $1.1M options CALL | 598,070 | 0.22% | 11q | -49.4%-$8.4M |
| CITADEL ADVISORS LLC | $8.5M incl. $1.0M options CALL | 589,696 | 0.00% | 23q | +157.1%+$5.2M |
| JANE STREET GROUP, LLC | $7.5M incl. $565.6K options CALL | 551,625 | 0.00% | 11q | +94.9%+$3.7M |
| RENAISSANCE TECHNOLOGIES LLC | $7.2M | 574,407 | 0.01% | 19q | -20.1%-$1.8M |
| Shay Capital LLC | $7.2M | 570,000 | 0.46% | 14q | -26.5%-$2.6M |
| D. E. Shaw & Co., Inc. | $6.7M | 535,926 | 0.00% | 12q | +56.7%+$2.4M |
| SPEECE THORSON CAPITAL GROUP INC | $6.1M | 489,098 | 1.31% | 2q | -2.0%-$124.6K |
| EVR Research LP | $5.5M | 440,000 | 2.73% | new | NEW |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $5.4M | 433,046 | 0.00% | 2q | -20.8%-$1.4M |
| GOLDMAN SACHS GROUP INC | $5.4M | 428,866 | 0.00% | 23q | -31.2%-$2.4M |
| TWO SIGMA INVESTMENTS, LP | $5.1M | 409,480 | 0.00% | 10q | +133.6%+$2.9M |
| AQR CAPITAL MANAGEMENT LLC | $4.9M | 391,641 | 0.00% | 9q | -18.7%-$1.1M |
| HRT FINANCIAL LP | $4.7M | 372,929 | 0.01% | 3q | +13.2%+$547.9K |
| BANK OF AMERICA CORP /DE/ | $4.7M | 371,840 | 0.00% | 23q | +32.9%+$1.2M |
| Triad Investment Management | $4.6M | 368,731 | 5.11% | 8q | +10.4%+$438.3K |
| Stoic Point Capital Management LLC | $3.7M | 297,150 | 3.10% | 3q | +34.4%+$956.7K |
| NORTHERN TRUST CORP | $3.4M | 267,107 | 0.00% | 23q | -1.7%-$59.3K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $3.3M | 259,224 | 0.00% | 23q | -5.5%-$190.0K |
| Squarepoint Ops LLC | $2.9M | 234,255 | 0.00% | 10q | +8.7%+$235.2K |
| VANGUARD FIDUCIARY TRUST CO | $2.8M | 223,917 | 0.00% | 2q | -1.4%-$40.2K |
| TEACHER RETIREMENT SYSTEM OF TEXAS | $2.7M | 216,405 | 0.01% | 9q | +16.8%+$390.7K |
| BNP PARIBAS FINANCIAL MARKETS | $2.6M | 209,204 | 0.00% | 7q | +272.2%+$1.9M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $2.3M | 180,171 | 0.00% | 9q | HELD |
| XTX Topco Ltd | $2.2M | 172,269 | 0.03% | 5q | +17.3%+$319.7K |
| ALGERT GLOBAL LLC | $2.1M | 170,870 | 0.03% | 2q | +102.2%+$1.1M |
| Man Group plc | $2.0M | 156,754 | 0.00% | 3q | +14.7%+$252.0K |
| ALLIANCEBERNSTEIN L.P. | $2.0M | 211,450 | 0.00% | 17q | +2.9%+$55.9K |
| PRINCIPAL FINANCIAL GROUP INC | $1.9M | 148,845 | 0.00% | 4q | +8.2%+$141.2K |
| Quantinno Capital Management LP | $1.7M | 136,034 | 0.00% | 4q | +26.8%+$361.5K |
| Russell Investments Group, Ltd. | $1.6M | 130,360 | 0.00% | 9q | +53.6%+$568.4K |
| STIFEL FINANCIAL CORP | $1.6M | 126,175 | 0.00% | new | NEW |
| VICTORY CAPITAL MANAGEMENT INC | $1.3M | 101,365 | 0.00% | 9q | +16.2%+$177.2K |
| Balyasny Asset Management L.P. | $1.3M | 101,046 | 0.00% | 3q | -7.1%-$97.6K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.2M incl. $925.2K options CALL | 23,247 | 0.00% | 11q | -87.7%-$8.7M |
| Qube Research & Technologies Ltd | $1.2M | 92,453 | 0.00% | 10q | -77.7%-$4.1M |
| PDT Partners, LLC | $1.1M | 84,022 | 0.06% | 6q | -6.7%-$75.4K |
| Bank of New York Mellon Corp | $1.0M | 81,504 | 0.00% | 23q | -6.3%-$68.5K |
| Walleye Capital LLC | $1.0M | 80,306 | 0.00% | new | NEW |
| FRANKLIN RESOURCES INC | $937.6K | 74,587 | 0.00% | 10q | -78.3%-$3.4M |
| Amundi | $883.8K | 70,311 | 0.00% | 3q | -10.0%-$98.0K |
| STATE OF WISCONSIN INVESTMENT BOARD | $883.8K | 70,309 | 0.00% | 5q | -33.8%-$450.6K |
| Allianz Asset Management GmbH | $882.1K | 70,176 | 0.00% | 7q | HELD |
| WINMILL & CO. INC | $818.3K | 65,102 | 0.18% | new | NEW |
| PEAK6 LLC | $786.9K CALL | options only | 0.00% | new | OPTIONS |
| Swiss National Bank | $764.3K | 60,800 | 0.00% | 21q | +3.6%+$26.4K |
| BLAIR WILLIAM & CO/IL | $704.5K | 56,046 | 0.00% | 7q | HELD |
| GLOBEFLEX CAPITAL L P | $702.0K | 55,850 | 0.09% | 3q | -30.4%-$306.5K |
| Campbell & CO Investment Adviser LLC | $586.0K | 46,617 | 0.03% | 2q | +189.8%+$383.8K |
| RHUMBLINE ADVISERS | $577.4K | 45,932 | 0.00% | 23q | -4.1%-$24.5K |
| Hillsdale Investment Management Inc. | $577.0K | 45,900 | 0.01% | new | NEW |
| Allspring Global Investments Holdings, LLC | $563.5K | 44,831 | 0.00% | 8q | -6.4%-$38.4K |
| SEI INVESTMENTS CO | $561.1K | 44,637 | 0.00% | 23q | +24.9%+$111.9K |
| Mariner, LLC | $517.0K | 41,127 | 0.00% | 16q | -29.7%-$218.2K |
| Caption Management, LLC | $471.6K | 37,515 | 0.00% | 2q | -74.8%-$1.4M |
| PRICE T ROWE ASSOCIATES INC /MD/ | $467.0K | 37,076 | 0.00% | 19q | HELD |
| MILLENNIUM MANAGEMENT LLC | $465.9K | 37,065 | 0.00% | 11q | -21.2%-$125.4K |
| DEUTSCHE BANK AG\ | $430.6K | 34,254 | 0.00% | 23q | -2.4%-$10.5K |
| Lighthouse Investment Partners, LLC | $427.4K | 34,001 | 0.01% | new | NEW |
| UBS Group AG | $422.4K | 33,602 | 0.00% | 23q | -78.2%-$1.5M |
| BARCLAYS PLC | $381.5K | 30,349 | 0.00% | 18q | -33.1%-$188.7K |
| WELLS FARGO & COMPANY/MN | $354.0K | 28,163 | 0.00% | 23q | +128.5%+$199.1K |
| Legal & General Group Plc | $346.1K | 27,533 | 0.00% | 23q | HELD |
| Brevan Howard Capital Management LP | $340.9K | 27,117 | 0.00% | new | NEW |
| Dynamic Technology Lab Private Ltd | $338.0K | 26,868 | 0.08% | 2q | -38.4%-$210.4K |
| FMR LLC | $331.7K | 26,386 | 0.00% | 18q | -2.9%-$9.9K |
| Invesco Ltd. | $327.3K | 26,039 | 0.00% | 5q | +10.2%+$30.3K |
| State of Alaska, Department of Revenue | $324.0K | 25,862 | 0.00% | 4q | +1288.9%+$300.7K |
| TUDOR INVESTMENT CORP ET AL | $323.7K | 25,748 | 0.00% | new | NEW |
| ALLSTATE CORP | $317.9K | 25,287 | 0.00% | new | NEW |
| AXQ CAPITAL, LP | $315.7K | 25,117 | 0.03% | new | NEW |
| Abel Hall, LLC | $307.6K | 24,473 | 0.05% | 2q | -3.7%-$12.0K |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $303.5K | 24,141 | 0.00% | 23q | -4.4%-$14.0K |
| CITIGROUP INC | $301.7K | 24,003 | 0.00% | 23q | +140.6%+$176.3K |
| Corient Private Wealth LP | $294.8K | 23,451 | 0.00% | 2q | +50.7%+$99.2K |
| Quantbot Technologies LP | $271.1K | 21,568 | 0.01% | 2q | -25.9%-$94.9K |
| MetLife Investment Management, LLC | $269.0K | 21,402 | 0.00% | 23q | HELD |
| JUPITER ASSET MANAGEMENT LTD | $266.1K | 21,172 | 0.00% | 2q | HELD |
| Zurcher Kantonalbank (Zurich Cantonalbank) | $234.3K | 18,642 | 0.00% | 10q | HELD |
| SIMPLEX TRADING, LLC | $221.2K CALL | options only | 0.00% | 2q | OPTIONS |
| VANGUARD ASSET MANAGEMENT, Ltd | $219.0K | 17,425 | 0.00% | 2q | HELD |
| Graham Capital Management, L.P. | $215.9K | 17,179 | 0.00% | 3q | +18.1%+$33.1K |
| MERCER GLOBAL ADVISORS INC /ADV | $208.6K | 16,595 | 0.00% | 4q | +2.7%+$5.5K |
| Creative Planning | $203.9K | 16,220 | 0.00% | 5q | -18.7%-$46.8K |
| NOMURA HOLDINGS INC | $201.8K | 16,058 | 0.00% | new | NEW |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $198.0K | 14,811 | 0.00% | 5q | -29.2%-$81.6K |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-10-30 | 13D/A | White Mountains Insurance Group, Ltd.with 1 co-filers | 35.1% |
What the company announced
Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.
| Filed | Event date | What | Source |
|---|---|---|---|
| 2026-09-09 | 2026-09-09 | Material agreement entered | filing |
| 2026-09-03 | 2026-09-02 | Directors or officers departed or appointed | filing |
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-15 | Yi Steven | See Remarks | Sold | 114,292 | $1.6M |
| 2026-07-01 | Yi Steven | See Remarks | Sold | 96,000 | $1.2M |
| 2026-07-16 | Yi Steven | See Remarks | Sold | 82,457 | $1.2M |
| 2026-08-03 | Yi Steven | See Remarks | Sold | 72,000 | $910.0K |
| 2026-07-06 | Nonko Eugene | Director | Sold | 50,344 | $699.1K ×2 |
| 2026-09-01 | Yi Steven | See Remarks | Sold | 48,000 | $594.4K |
| 2026-07-14 | Yi Steven | See Remarks | Sold | 37,701 | $530.0K |
| 2026-07-07 | Yi Steven | See Remarks | Sold | 26,467 | $372.5K |
| 2026-07-06 | Yi Steven | See Remarks | Sold | 17,254 | $241.8K |
| 2026-07-28 | Nonko Eugene | Director | Sold | 17,465 | $241.2K ×2 |
| 2026-10-08 | Yi Steven | See Remarks | Sold | 24,000 | $240.9K |
| 2026-07-13 | Nonko Eugene | Director | Sold | 17,465 | $240.6K ×2 |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 27 | $5.9M | 617,756 | 10 | 8 | 3 | 0.0% |
| Q2 2026 | 156 | $615.4M | 48,666,420 | 21 | 46 | 64 | 0.8% |
| Q1 2026 | 164 | $461.1M | 48,492,320 | 30 | 59 | 55 | 2.0% |
| Q4 2025 | 172 | $621.5M | 47,778,166 | 31 | 75 | 48 | 0.5% |
| Q3 2025 | 158 | $559.5M | 48,898,909 | 25 | 64 | 46 | 0.6% |
| Q2 2025 | 154 | $530.0M | 48,276,489 | 29 | 66 | 44 | 0.3% |
| Q1 2025 | 146 | $440.7M | 47,217,325 | 20 | 58 | 41 | 1.0% |
| Q4 2024 | 163 | $546.9M | 48,149,139 | 28 | 62 | 48 | 0.6% |
| Q3 2024 | 153 | $890.4M | 48,969,106 | 31 | 61 | 39 | 0.4% |
| Q2 2024 | 150 | $668.1M | 50,313,313 | 51 | 63 | 26 | 0.8% |
| Q1 2024 | 123 | $919.5M | 45,042,888 | 40 | 35 | 30 | 0.2% |
| Q4 2023 | 91 | $473.6M | 42,459,342 | 9 | 34 | 30 | 0.0% |
| Q3 2023 | 89 | $341.8M | 41,357,405 | 8 | 14 | 53 | 0.0% |
| Q2 2023 | 93 | $463.8M | 44,969,280 | 15 | 43 | 24 | 0.0% |
| Q1 2023 | 98 | $602.6M | 40,226,695 | 17 | 31 | 32 | 0.0% |
| Q4 2022 | 99 | $398.8M | 40,074,367 | 24 | 35 | 28 | 0.0% |
| Q3 2022 | 82 | $358.5M | 40,960,563 | 10 | 40 | 21 | 0.0% |
| Q2 2022 | 83 | $393.6M | 39,952,261 | 10 | 31 | 28 | 0.0% |
| Q1 2022 | 92 | $1.2B | 74,157,276 | 17 | 28 | 29 | 0.0% |
| Q4 2021 | 89 | $1.3B | 82,537,079 | 19 | 26 | 30 | 0.0% |
| Q3 2021 | 85 | $1.6B | 83,195,090 | 15 | 33 | 22 | 0.0% |
| Q2 2021 | 97 | $3.8B | 90,580,164 | 23 | 41 | 23 | 0.0% |
| Q1 2021 | 95 | $3.1B | 88,512,275 | 37 | 42 | 13 | 0.0% |
| Q4 2020 | 64 | $1.4B | 36,011,649 | 61 | 0 | 0 | 0.0% |
