Similarweb
SMWB
69 hedge funds and large institutions have $246M invested in Similarweb in 2026 Q2 according to their latest regulatory filings, with 16 funds opening new positions, 19 increasing their positions, 20 reducing their positions, and 27 closing their positions.
1,748% more call options, than puts
Call options by funds: $1.83M | Put options by funds: $99K
112% more capital invested
Capital invested by funds: $116M → $246M (+$130M)
100% more funds holding in top 10
Funds holding in top 10: 3 → 6 (+3)
5% less repeat investments, than reductions
Existing positions increased: 19 | Existing positions reduced: 20
2.86% less ownership
Funds ownership: 48.6% → 45.74% (-2.9%)
14% less funds holding
Funds holding: 80 → 69 (-11)
41% less first-time investments, than exits
New positions opened: 16 | Existing positions closed: 27
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SSA
Schonfeld Strategic Advisors
New York
|
+$3.35M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
+$2.39M |
| 3 |
LTM
Lotus Technology Management
Orlando,
Florida
|
+$1.93M |
| 4 |
AIM
ARK Investment Management
St. Petersburg,
Florida
|
+$1.76M |
| 5 |
Jane Street
New York
|
+$1.03M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
-$2.94M |
| 2 |
CP
CenterBook Partners
Greenwich,
Connecticut
|
-$2.64M |
| 3 |
Marshall Wace
London,
United Kingdom
|
-$2.1M |
| 4 |
MFS
Mirabella Financial Services
London,
United Kingdom
|
-$2.07M |
| 5 |
Acadian Asset Management
Boston,
Massachusetts
|
-$1.45M |
SMWB Hedge Fund Activity: Q2 2026 in Review
69 of the 8,317 institutional investors tracked by Wall St. Rank reported a position in Similarweb (SMWB) for Q2 2026, worth a combined $246M — up 112% from $116M a quarter earlier.
Sellers outnumbered buyers: 27 funds closed out of SMWB and 16 opened new positions — a net loss of 11 holders — while 20 trimmed existing stakes and 19 added.
The largest buyer was Schonfeld Strategic Advisors, adding an estimated $3.35M. The largest seller was Millennium Management, cutting an estimated $2.94M.
- 69 institutional investors held Similarweb (SMWB) as of Q2 2026, down from 80 in Q1 2026.
- Funds reported $246M of Similarweb stock for Q2 2026, up 112% quarter-over-quarter.
- 16 funds opened new Similarweb positions in Q2 2026 and 27 closed out, a net change of -11 holders.
- The largest Similarweb buyer in Q2 2026 was Schonfeld Strategic Advisors, an estimated $3.35M added.
- The largest Similarweb seller in Q2 2026 was Millennium Management, an estimated $2.94M sold.
Based on aggregated 13F filings for Q2 2026.