Ribbon Communications
RBBN
153 hedge funds and large institutions have $369M invested in Ribbon Communications in 2025 Q4 according to their latest regulatory filings, with 25 funds opening new positions, 56 increasing their positions, 51 reducing their positions, and 24 closing their positions.
10% more repeat investments, than reductions
Existing positions increased: 56 | Existing positions reduced: 51
4% more first-time investments, than exits
New positions opened: 25 | Existing positions closed: 24
0.08% more ownership
Funds ownership: 73.34% → 73.41% (+0.08%)
0% more funds holding
Funds holding: 153 → 153 (0)
24% less capital invested
Capital invested by funds: $489M → $369M (-$119M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Acadian Asset Management
Boston,
Massachusetts
|
+$2.34M |
| 2 |
KCM
Kennedy Capital Management
St Louis,
Missouri
|
+$2.29M |
| 3 |
Jacobs Levy Equity Management
Florham Park,
New Jersey
|
+$1.35M |
| 4 |
D.E. Shaw & Co
New York
|
+$1.26M |
| 5 |
Goldman Sachs
New York
|
+$1.17M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Neuberger Berman Group
New York
|
-$2.66M |
| 2 |
CCM
Cinctive Capital Management
New York
|
-$1.99M |
| 3 |
Franklin Resources
San Mateo,
California
|
-$1.7M |
| 4 |
PCMI
Paradigm Capital Management Inc
Albany,
New York
|
-$1.37M |
| 5 |
Raymond James Financial
St Petersburg,
Florida
|
-$1.33M |
RBBN Hedge Fund Activity: Q4 2025 in Review
153 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Ribbon Communications (RBBN) for Q4 2025, worth a combined $369M — down 24% from $489M a quarter earlier.
Buyers outnumbered sellers: 25 funds opened new RBBN positions and 24 closed out — a net gain of 1 holder — while 56 added to existing stakes and 51 trimmed.
The largest buyer was Acadian Asset Management, adding an estimated $2.34M. The largest seller was Neuberger Berman Group, cutting an estimated $2.66M.
- 153 institutional investors held Ribbon Communications (RBBN) as of Q4 2025, unchanged from Q3 2025.
- Funds reported $369M of Ribbon Communications stock for Q4 2025, down 24% quarter-over-quarter.
- 25 funds opened new Ribbon Communications positions in Q4 2025 and 24 closed out, a net change of +1 holder.
- The largest Ribbon Communications buyer in Q4 2025 was Acadian Asset Management, an estimated $2.34M added.
- The largest Ribbon Communications seller in Q4 2025 was Neuberger Berman Group, an estimated $2.66M sold.
Based on aggregated 13F filings for Q4 2025.