PubMatic
PUBM
150 hedge funds and large institutions have $229M invested in PubMatic in 2025 Q3 according to their latest regulatory filings, with 28 funds opening new positions, 48 increasing their positions, 48 reducing their positions, and 25 closing their positions.
76% more call options, than puts
Call options by funds: $6.55M | Put options by funds: $3.73M
12% more first-time investments, than exits
New positions opened: 28 | Existing positions closed: 25
9.2% more ownership
Funds ownership: 64.53% → 73.72% (+9.2%)
1% more funds holding
Funds holding: 148 → 150 (+2)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
0% more repeat investments, than reductions
Existing positions increased: 48 | Existing positions reduced: 48
29% less capital invested
Capital invested by funds: $322M → $229M (-$92.9M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CP
CenterBook Partners
Greenwich,
Connecticut
|
+$5.37M |
| 2 |
UBS Group
Zurich,
Switzerland
|
+$3.09M |
| 3 |
RC
Roubaix Capital
Denver,
Colorado
|
+$2.76M |
| 4 |
SST
S Squared Technology
New York
|
+$2.66M |
| 5 |
Two Sigma Investments
New York
|
+$2.33M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Nordea Investment Management
Stockholm,
Sweden
|
-$4.44M |
| 2 |
TI
Trexquant Investment
Stamford,
Connecticut
|
-$2.05M |
| 3 |
Citadel Advisors
Miami,
Florida
|
-$1.88M |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
-$1.14M |
| 5 |
Jane Street
New York
|
-$1.06M |
PUBM Hedge Fund Activity: Q3 2025 in Review
150 of the 7,641 institutional investors tracked by Wall St. Rank reported a position in PubMatic (PUBM) for Q3 2025, worth a combined $229M — down 29% from $322M a quarter earlier.
Buyers outnumbered sellers: 28 funds opened new PUBM positions and 25 closed out — a net gain of 3 holders — while 48 added to existing stakes and 48 trimmed.
The largest buyer was CenterBook Partners, adding an estimated $5.37M. The largest seller was Nordea Investment Management, exiting entirely with an estimated $4.44M sold.
- 150 institutional investors held PubMatic (PUBM) as of Q3 2025, up from 148 in Q2 2025.
- Funds reported $229M of PubMatic stock for Q3 2025, down 29% quarter-over-quarter.
- 28 funds opened new PubMatic positions in Q3 2025 and 25 closed out, a net change of +3 holders.
- The largest PubMatic buyer in Q3 2025 was CenterBook Partners, an estimated $5.37M added.
- The largest PubMatic seller in Q3 2025 was Nordea Investment Management, an estimated $4.44M sold.
Based on aggregated 13F filings for Q3 2025.