MediaAlpha, Inc.
US ˙ NYSE ˙ US58450V1044

SecurityMAX / MediaAlpha, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership620,669 shares
Latest Disclosed Value $ 5,772,533
Dimensional Fund Advisors Lp reports 94.08% increase in ownership of MAX / MediaAlpha, Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 620,669 shares of MediaAlpha, Inc. (US:MAX) valued at $5,772,222 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 319,798 shares of MediaAlpha, Inc.. This represents a change in shares of 94.08% during the quarter. The current value of the position is $5,145,346 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F MEDIAALPHA CL A 58450V104 620,669 300,871 94.08 5,773 39.39 0.0003
2026-02-12 2025-12-31 13F MEDIAALPHA CL A 58450V104 319,798 201,106 169.44 4,142 206.74 0.0009
2025-11-12 2025-09-30 13F MEDIAALPHA CL A 58450V104 118,692 54,584 85.14 1,351 92.58 0.0003
2025-08-12 2025-06-30 13F MEDIAALPHA CL A 58450V104 64,108 64,108 702 0.0002
2024-08-09 2024-06-30 13F MEDIAALPHA CL A 58450V104 0 -10,278 -100.00 0 -100.00
2024-05-10 2024-03-31 13F MEDIAALPHA CL A 58450V104 10,278 0 0.00 209 83.33 0.0001
2024-02-07 2023-12-31 13F MEDIAALPHA CL A 58450V104 10,278 0 0.00 115 35.71 0.0000
2023-11-09 2023-09-30 13F MEDIAALPHA CL A 58450V104 10,278 -31,353 -75.31 85 -80.42 0.0000
2023-08-09 2023-06-30 13F MEDIAALPHA CL A 58450V104 41,631 -68,321 -62.14 429 -73.95 0.0001
2023-05-12 2023-03-31 13F MEDIAALPHA CL A 58450V104 109,952 109,952 1,647 0.0006
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.