MAX in the 13F filings
Mediaalpha Inc · CUSIP 58450V104
- Quarter end
- 30 Jun 2026
- the date the book describes
- Filed
- 2 Sep 2026
- latest of these filings; the earliest 3 Aug 2026
- Managers listing it
- 23
- at least, of 95 tracked, among listed positions
- Comparable managers
- 91
- filed both Q1 2026 and Q2 2026; 1 listed it in both
- Shares listed
- 5,945,769
- combined, among listed positions
- Reported value
- $74m
- combined, at the quarter end
AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.
Among the 91 comparable managers: 12 buyers (opened or added shares) and 10 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +667,590.
Managers listing MAX in Q2 2026
23 of 23 holders
Largest increases and reductions, by shares
Increases
- Citadel Advisors LLCexisting position · 589,696 shares now+360,373
- Jane Street Group LLCexisting position · 551,625 shares now+268,617
- Two Sigma Investments LPexisting position · 409,480 shares now+234,191
- D. E. Shaw & Co.existing position · 535,926 shares now+193,868
- Acadian Asset Management LLCexisting position · 957,095 shares now+109,896
Reductions
- Arrowstreet Capital LPexisting position · 829,958 shares now-232,023
- Susquehanna International Group LLPexisting position · 23,247 shares now-166,489
- Renaissance Technologies LLCexisting position · 574,407 shares now-144,893
- AQR Capital Management LLCexisting position · 391,641 shares now-90,310
- Millennium Management LLCexisting position · 37,065 shares now-9,976
New positions and exits
New (3)
Exited (1)
- Schonfeld Strategic Advisors LLCwas $129k
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q3 2021 | 1 | $4.4m | n.a. | n.a. |
| Q3 2024 | 1 | $1.2m | 1 | 0 |
| Q1 2025 | 1 | $1.2m | 1 | 0 |
| Q2 2025 | 1 | $1.8m | 1 | 0 |
| Q3 2025 | 1 | $1.9m | 0 | 0 |
| Q4 2025 | 1 | $2.1m | 20 | 7 |
| Q1 2026 | 1 | $837k | 12 | 15 |
| Q2 2026 | 1 | $1.1m | 12 | 10 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
MAX and V →MAX and MA →MAX and MCO →Choose a stock to compare with MAX →
How much of the picture this is
A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.
Which funds own MAX, latest filings →Back to the 13F Explorer →