Latest Period
Q1 2026
Security Snapshot
MediaAlpha, Inc. - Class A Common Stock, par value $0.01 per share (MAX) Institutional Ownership
CUSIP: 58450V104
13F Institutional Holders and Ownership History from Q4 2020 to Q1 2026
Institutions Reporting
161
Shares (Excl. Options)
48,222,345
Price
$9.30
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- Security type / class
- Equity / Class A Common Stock, par value $0.01 per share
- Symbol
- MAX on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 48,222,345
- Total 13F value
- $449,452,761
- Portfolio coverage rank
- 0%
- Share change
- +1,028,786
- Value change
- +$2,288,368
- Number of holders
- 161
- Shares outstanding
- 54,061,804
- SEC-reported price per share
- $8.64
- Insider filing price
- $8.64
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- MAX - MediaAlpha, Inc. - Class A Common Stock, par value $0.01 per share is tracked under CUSIP 58450V104.
- 161 institutions reported positions in Q1 2026.
- 4 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 172 to 161 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $618,558,872 to $449,452,761.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 161 institutions filings for Q1 2026.
Security key
58450V104
Latest holder period
Q1 2026
13F holders
161
13D/G owners
4
CIK / CUSIP context first
Open Q1 2026 holders
MAX full holder history
MediaAlpha, Inc. SEC filings
MediaAlpha, Inc. company facts
MediaAlpha, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 58450V104:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
4
Security
MAX
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| WHITE MOUNTAINS INSURANCE GROUP LTD | 33% | +4.2% | $162,138,055 | 17,856,614 | 0% | White Mountains Insurance Group, Ltd. | 29 Apr 2026 | |
| Nonko Eugene | 11% | $50,433,626 | 5,996,864 | Eugene Nonko | 26 Feb 2025 | |||
| VANGUARD GROUP INC | 4.6% | -13% | $29,595,067 | -$3,558,606 | 2,600,621 | -11% | The Vanguard Group | 30 Sep 2025 |
| BlackRock, Inc. | 4.2% | $19,603,550 | 2,330,981 | BlackRock, Inc. | 31 Mar 2025 |
As of 31 Mar 2026, 161 institutional investors reported holding 48,222,345 shares of MediaAlpha, Inc. - Class A Common Stock, par value $0.01 per share (MAX). This represents 89% of the company’s total 54,061,804 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
76%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| WHITE MOUNTAINS INSURANCE GROUP LTD | 33% | 17,856,614 | 0% | 53% | $166,066,510 |
| BlackRock, Inc. | 6.4% | 3,476,687 | -2.1% | 0% | $32,333,189 |
| Clearline Capital LP | 4.8% | 2,590,670 | +99% | 1.9% | $24,093,231 |
| JPMORGAN CHASE & CO | 3.2% | 1,745,679 | +28% | 0% | $16,479,210 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.6% | 1,385,729 | 0% | 0% | $12,887,280 |
| J. Goldman & Co LP | 2.2% | 1,182,673 | +50% | 0.51% | $10,998,859 |
| GEODE CAPITAL MANAGEMENT, LLC | 2% | 1,070,084 | +38% | 0% | $9,953,383 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2% | 1,061,981 | +24% | 0.01% | $9,876,423 |
| JACOBS ASSET MANAGEMENT, LLC | 1.7% | 924,443 | +31% | 5.1% | $8,597,320 |
| ACADIAN ASSET MANAGEMENT LLC | 1.6% | 847,199 | +40% | 0.01% | $7,866,000 |
| STATE STREET CORP | 1.6% | 838,161 | +15% | 0% | $7,794,897 |
| Shay Capital LLC | 1.4% | 775,000 | +31% | 1% | $7,207,500 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 1.4% | 750,054 | +7.1% | 0.03% | $6,975,502 |
| RENAISSANCE TECHNOLOGIES LLC | 1.3% | 719,300 | -31% | 0.01% | $6,689,490 |
| MORGAN STANLEY | 1.3% | 703,018 | -27% | 0% | $6,538,067 |
| Nuveen, LLC | 1.3% | 701,399 | +5.2% | 0% | $6,523,011 |
| GOLDMAN SACHS GROUP INC | 1.2% | 623,421 | -15% | 0% | $5,797,815 |
| DIMENSIONAL FUND ADVISORS LP | 1.1% | 620,669 | +94% | 0% | $5,772,533 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1% | 546,745 | 0% | 0% | $5,084,729 |
| SPEECE THORSON CAPITAL GROUP INC | 0.92% | 499,011 | 1.1% | $4,641,000 | |
| AQR CAPITAL MANAGEMENT LLC | 0.89% | 481,951 | -40% | 0% | $4,482,145 |
| Philadelphia Financial Management of San Francisco, LLC | 0.89% | 480,000 | 1.4% | $4,464,000 | |
| Qube Research & Technologies Ltd | 0.77% | 415,280 | +46% | 0.01% | $3,862,104 |
| FRANKLIN RESOURCES INC | 0.64% | 343,709 | +4.6% | 0% | $3,196,494 |
| D. E. Shaw & Co., Inc. | 0.63% | 342,058 | -14% | 0% | $3,181,139 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
22
Latest
Q1 2026
Rows shown
1-22 of 22
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 48,222,345 | $449,452,761 | +$2,288,368 | $9.30 | 161 |
| 2025 Q4 | 47,777,704 | $618,558,872 | -$3,810,531 | $12.95 | 172 |
| 2025 Q3 | 47,834,261 | $544,284,591 | -$5,576,109 | $11.38 | 155 |
| 2025 Q2 | 48,248,875 | $528,271,825 | +$14,118,305 | $10.95 | 150 |
| 2025 Q1 | 47,216,825 | $436,277,189 | -$13,260,709 | $9.24 | 144 |
| 2024 Q4 | 48,012,860 | $542,040,862 | -$30,038,335 | $11.29 | 160 |
| 2024 Q3 | 48,841,707 | $884,623,606 | -$13,101,139 | $18.11 | 149 |
| 2024 Q2 | 50,156,074 | $660,550,927 | +$73,061,027 | $13.17 | 148 |
| 2024 Q1 | 44,465,137 | $905,749,037 | +$50,675,474 | $20.37 | 121 |
| 2023 Q4 | 42,177,953 | $470,287,857 | +$11,065,270 | $11.15 | 91 |
| 2023 Q3 | 41,318,609 | $341,293,559 | -$30,498,529 | $8.26 | 88 |
| 2023 Q2 | 44,969,280 | $463,619,203 | +$44,418,589 | $10.31 | 93 |
| 2023 Q1 | 40,225,052 | $602,536,583 | +$6,187,743 | $14.98 | 97 |
| 2022 Q4 | 40,074,367 | $398,740,275 | -$6,863,804 | $9.95 | 99 |
| 2022 Q3 | 40,904,666 | $357,953,192 | +$8,359,779 | $8.75 | 85 |
| 2022 Q2 | 39,895,591 | $392,992,743 | -$19,477,199 | $9.85 | 86 |
| 2022 Q1 | 40,929,266 | $677,250,933 | +$17,737,970 | $16.55 | 92 |
| 2021 Q4 | 39,939,473 | $616,578,624 | +$24,793,185 | $15.44 | 90 |
| 2021 Q3 | 37,915,100 | $708,460,043 | -$44,874,431 | $18.68 | 84 |
| 2021 Q2 | 37,796,810 | $1,591,371,035 | +$61,978,526 | $42.10 | 98 |
| 2021 Q1 | 36,467,183 | $1,291,891,052 | +$143,997,399 | $35.43 | 96 |
| 2020 Q4 | 32,348,576 | $1,263,856,778 | +$460,451,778 | $39.07 | 65 |