Ribbon Communications
RBBN
153 hedge funds and large institutions have $489M invested in Ribbon Communications in 2025 Q3 according to their latest regulatory filings, with 25 funds opening new positions, 50 increasing their positions, 44 reducing their positions, and 16 closing their positions.
56% more first-time investments, than exits
New positions opened: 25 | Existing positions closed: 16
14% more repeat investments, than reductions
Existing positions increased: 50 | Existing positions reduced: 44
6% more funds holding
Funds holding: 145 → 153 (+8)
0.77% more ownership
Funds ownership: 72.57% → 73.34% (+0.77%)
4% less capital invested
Capital invested by funds: $509M → $489M (-$20.3M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RA
Royce & Associates
New York
|
+$2.49M |
| 2 |
CCM
Cinctive Capital Management
New York
|
+$2.06M |
| 3 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$1.89M |
| 4 |
Connor, Clark & Lunn Investment Management (CC&L)
Vancouver,
British Columbia, Canada
|
+$1.53M |
| 5 |
Marshall Wace
London,
United Kingdom
|
+$1.36M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
-$3.33M |
| 2 |
Franklin Resources
San Mateo,
California
|
-$1.94M |
| 3 |
Neuberger Berman Group
New York
|
-$817K |
| 4 |
UBS AM
Chicago,
Illinois
|
-$599K |
| 5 |
Victory Capital Management
San Antonio,
Texas
|
-$537K |
RBBN Hedge Fund Activity: Q3 2025 in Review
153 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in Ribbon Communications (RBBN) for Q3 2025, worth a combined $489M — down 4% from $509M a quarter earlier.
Buyers outnumbered sellers: 25 funds opened new RBBN positions and 16 closed out — a net gain of 9 holders — while 50 added to existing stakes and 44 trimmed.
The largest buyer was Royce & Associates, adding an estimated $2.49M. The largest seller was Millennium Management, exiting entirely with an estimated $3.33M sold.
- 153 institutional investors held Ribbon Communications (RBBN) as of Q3 2025, up from 145 in Q2 2025.
- Funds reported $489M of Ribbon Communications stock for Q3 2025, down 4% quarter-over-quarter.
- 25 funds opened new Ribbon Communications positions in Q3 2025 and 16 closed out, a net change of +9 holders.
- The largest Ribbon Communications buyer in Q3 2025 was Royce & Associates, an estimated $2.49M added.
- The largest Ribbon Communications seller in Q3 2025 was Millennium Management, an estimated $3.33M sold.
Based on aggregated 13F filings for Q3 2025.