PUBM in the 13F filings
Pubmatic Inc · CUSIP 74467Q103
- Quarter end
- 31 Mar 2026
- the date the book describes
- Filed
- 15 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; 0 listed it in both
- Shares listed
- 5,934,545
- combined, among listed positions
- Reported value
- $49m
- 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: 13 buyers (opened or added shares) and 13 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,008,596.
Managers listing PUBM in Q1 2026
21 of 21 holders
Largest increases and reductions, by shares
Increases
- Acadian Asset Management LLCexisting position · 1,576,540 shares now+650,169
- Renaissance Technologies LLCexisting position · 1,540,533 shares now+321,200
- Tudor Investment Corpexisting position · 351,112 shares now+250,475
- Arrowstreet Capital LPnew position · 206,287 shares now+206,287
- AQR Capital Management LLCnew position · 124,954 shares now+124,954
Reductions
- Millennium Management LLCexisting position · 92,023 shares now-826,104
- Point72 Asset Management LPexisting position · 22,303 shares now-136,611
- Citadel Advisors LLCexisting position · 149,043 shares now-117,100
- D. E. Shaw & Co.existing position · 445,114 shares now-101,379
- Squarepoint Ops LLCexisting position · 23,114 shares now-44,627
New positions and exits
New (4)
Exited (6)
- Wellington Management Group LLPwas $10m
- Walleye Capital LLCwas $1.4m
- Marshall Wace LLPwas $1.3m
- Schonfeld Strategic Advisors LLCwas $957k
- ExodusPoint Capital Management LPwas $618k
- Verition Fund Management LLCwas $98k
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q4 2020 | 3 | $15m | n.a. | n.a. |
| Q2 2021 | 1 | $7.6m | n.a. | n.a. |
| Q3 2021 | 2 | $7.8m | n.a. | n.a. |
| Q4 2021 | 2 | $17m | n.a. | n.a. |
| Q1 2022 | 3 | $11m | n.a. | n.a. |
| Q2 2022 | 1 | $1.4m | n.a. | n.a. |
| Q3 2023 | 1 | $522k | n.a. | n.a. |
| Q4 2023 | 1 | $546k | 0 | 1 |
| Q1 2024 | 1 | $446k | 0 | 1 |
| Q2 2024 | 1 | $5.9m | 1 | 0 |
| Q2 2025 | 1 | $7.8m | 1 | 0 |
| Q1 2026 | 1 | $13m | 13 | 13 |
| Q2 2026 | 1 | $21m | 9 | 13 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
PUBM and GOOGL →PUBM and META →PUBM and SPCX →Choose a stock to compare with PUBM →
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 PUBM, latest filings →Back to the 13F Explorer →