Ribbon Communications
RBBN
150 hedge funds and large institutions have $268M invested in Ribbon Communications in 2026 Q1 according to their latest regulatory filings, with 37 funds opening new positions, 51 increasing their positions, 43 reducing their positions, and 35 closing their positions.
19% more repeat investments, than reductions
Existing positions increased: 51 | Existing positions reduced: 43
6% more first-time investments, than exits
New positions opened: 37 | Existing positions closed: 35
0.19% more ownership
Funds ownership: 73.41% → 73.61% (+0.19%)
2% less funds holding
Funds holding: 153 → 150 (-3)
27% less capital invested
Capital invested by funds: $369M → $268M (-$101M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AQR Capital Management
Greenwich,
Connecticut
|
+$1.83M |
| 2 |
Acadian Asset Management
Boston,
Massachusetts
|
+$1.62M |
| 3 |
Marshall Wace
London,
United Kingdom
|
+$1.43M |
| 4 |
D.E. Shaw & Co
New York
|
+$1.34M |
| 5 |
Citadel Advisors
Miami,
Florida
|
+$1.25M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
First Eagle Investment Management
New York
|
-$2.48M |
| 2 |
BlackRock
New York
|
-$2.25M |
| 3 |
KCM
Kennedy Capital Management
St Louis,
Missouri
|
-$2.05M |
| 4 |
HIM
Herald Investment Management
London,
United Kingdom
|
-$1.68M |
| 5 |
Jane Street
New York
|
-$1.09M |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
176
Mackenzie Financial
Toronto Ontario,
Ontario, Canada
| – | -$31.4K | -10,652 | Closed |
|
|
FA
177
Fortis Advisors
Wayne,
Pennsylvania
| – | -$28.8K | -10,000 | Closed |
|
178
Canada Life
Winnipeg,
Manitoba, Canada
| – | -$11K | -3,680 | Closed |
|
|
AB
179
Amalgamated Bank
New York
| – | -$8K | -2,947 | Closed |
|
180
Simplex Trading
Chicago,
Illinois
| – | -$6.19K | -2,586 | Closed |
|
|
PA
181
Parallel Advisors
San Francisco,
California
| – | -$596 | -207 | Closed |
|
|
QCG
182
Quadrant Capital Group
Cincinnati,
Ohio
| – | -$484 | -168 | Closed |
|
183
Nisa Investment Advisors
St. Louis,
Missouri
| – | -$452 | -157 | Closed |
|
|
GI
184
GAMMA Investing
Foster City,
California
| – | -$150 | -52 | Closed |
|
|
AT
185
Arlington Trust
Birmingham,
Alabama
| – | -$17 | -6 | Closed |
|
RBBN Hedge Fund Activity: Q1 2026 in Review
150 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in Ribbon Communications (RBBN) for Q1 2026, worth a combined $268M — down 27% from $369M a quarter earlier.
Buyers outnumbered sellers: 37 funds opened new RBBN positions and 35 closed out — a net gain of 2 holders — while 51 added to existing stakes and 43 trimmed.
The largest buyer was AQR Capital Management, adding an estimated $1.83M. The largest seller was First Eagle Investment Management, exiting entirely with an estimated $2.48M sold.
- 150 institutional investors held Ribbon Communications (RBBN) as of Q1 2026, down from 153 in Q4 2025.
- Funds reported $268M of Ribbon Communications stock for Q1 2026, down 27% quarter-over-quarter.
- 37 funds opened new Ribbon Communications positions in Q1 2026 and 35 closed out, a net change of +2 holders.
- The largest Ribbon Communications buyer in Q1 2026 was AQR Capital Management, an estimated $1.83M added.
- The largest Ribbon Communications seller in Q1 2026 was First Eagle Investment Management, an estimated $2.48M sold.
Based on aggregated 13F filings for Q1 2026.