MAX in the 13F filings
Mediaalpha Inc · CUSIP 58450V104
- Quarter end
- 31 Mar 2026
- the date the book describes
- Filed
- 18 May 2026
- latest of these filings; the earliest 12 May 2026
- Managers listing it
- 21
- at least, of 95 tracked, among listed positions
- Comparable managers
- 91
- filed both Q4 2025 and Q1 2026; 1 listed it in both
- Shares listed
- 5,278,179
- combined, among listed positions
- Reported value
- $50m
- 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 15 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,365,191.
Managers listing MAX in Q1 2026
21 of 21 holders
Largest increases and reductions, by shares
Increases
- Acadian Asset Management LLCexisting position · 847,199 shares now+241,028
- Arrowstreet Capital LPexisting position · 1,061,981 shares now+206,077
- AllianceBernstein LPexisting position · 205,440 shares now+171,510
- Two Sigma Investments LPexisting position · 175,289 shares now+115,429
- Susquehanna International Group LLPexisting position · 189,736 shares now+108,746
Reductions
- Millennium Management LLCexisting position · 47,041 shares now-704,704
- Renaissance Technologies LLCexisting position · 719,300 shares now-326,100
- AQR Capital Management LLCexisting position · 481,951 shares now-322,144
- Janus Henderson Group Ltdexisting position · 13,862 shares now-252,044
- Jane Street Group LLCexisting position · 283,008 shares now-77,121
New positions and exits
New (2)
Exited (6)
- Marshall Wace LLPwas $4.3m
- Tudor Investment Corpwas $1.1m
- ExodusPoint Capital Management LPwas $1.1m
- Verition Fund Management LLCwas $509k
- Point72 Asset Management LPwas $243k
- Caxton Associates LLPwas $180k
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 →