PubMatic
PUBM
157 hedge funds and large institutions have $238M invested in PubMatic in 2025 Q1 according to their latest regulatory filings, with 37 funds opening new positions, 40 increasing their positions, 54 reducing their positions, and 39 closing their positions.
93% more call options, than puts
Call options by funds: $3.74M | Put options by funds: $1.94M
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
5% less first-time investments, than exits
New positions opened: 37 | Existing positions closed: 39
2% less funds holding
Funds holding: 160 → 157 (-3)
1.92% less ownership
Funds ownership: 66.6% → 64.68% (-1.9%)
26% less repeat investments, than reductions
Existing positions increased: 40 | Existing positions reduced: 54
38% less capital invested
Capital invested by funds: $386M → $238M (-$148M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GHC
Graham Holdings Company
Arlington,
Virginia
|
+$6.59M |
| 2 |
D.E. Shaw & Co
New York
|
+$5.3M |
| 3 |
Acadian Asset Management
Boston,
Massachusetts
|
+$4.99M |
| 4 |
Pacer Advisors
Malvern,
Pennsylvania
|
+$3.54M |
| 5 |
Wellington Management Group
Boston,
Massachusetts
|
+$2.37M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Group
Malvern,
Pennsylvania
|
-$10.9M |
| 2 |
Millennium Management
New York
|
-$3.15M |
| 3 |
State of Wisconsin Investment Board
Madison,
Wisconsin
|
-$2.55M |
| 4 |
HIM
Hillsdale Investment Management
Toronto,
Ontario, Canada
|
-$2.49M |
| 5 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$2.19M |
PUBM Hedge Fund Activity: Q1 2025 in Review
157 of the 7,459 institutional investors tracked by Wall St. Rank reported a position in PubMatic (PUBM) for Q1 2025, worth a combined $238M — down 38% from $386M a quarter earlier.
Sellers outnumbered buyers: 39 funds closed out of PUBM and 37 opened new positions — a net loss of 2 holders — while 54 trimmed existing stakes and 40 added.
The largest buyer was Graham Holdings Company, adding an estimated $6.59M. The largest seller was Vanguard Group, cutting an estimated $10.9M.
- 157 institutional investors held PubMatic (PUBM) as of Q1 2025, down from 160 in Q4 2024.
- Funds reported $238M of PubMatic stock for Q1 2025, down 38% quarter-over-quarter.
- 37 funds opened new PubMatic positions in Q1 2025 and 39 closed out, a net change of -2 holders.
- The largest PubMatic buyer in Q1 2025 was Graham Holdings Company, an estimated $6.59M added.
- The largest PubMatic seller in Q1 2025 was Vanguard Group, an estimated $10.9M sold.
Based on aggregated 13F filings for Q1 2025.