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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.

New
Increased
Maintained
Reduced
Closed

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)

Holders
153
Holders Change
–
Holders Change %
0%
% of All Funds
1.86%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
25
Increased
56
Reduced
51
Closed
24
Calls
$738K
Puts
–
Net Calls
+$738K
Net Calls Change
-$111K

Top Buyers

Rank Fund Capital Flow
1
Acadian Asset Management
Acadian Asset Management
Massachusetts
+$2.34M
2
KCM
Kennedy Capital Management
Missouri
+$2.29M
3
Jacobs Levy Equity Management
Jacobs Levy Equity Management
New Jersey
+$1.35M
4
D.E. Shaw & Co
D.E. Shaw & Co
New York
+$1.26M
5
Goldman Sachs
Goldman Sachs
New York
+$1.17M

Top Sellers

Rank Fund Capital Flow
1
Neuberger Berman Group
Neuberger Berman Group
New York
-$2.66M
2
CCM
Cinctive Capital Management
New York
-$1.99M
3
Franklin Resources
Franklin Resources
California
-$1.7M
4
PCMI
Paradigm Capital Management Inc
New York
-$1.37M
5
Raymond James Financial
Raymond James Financial
Florida
-$1.33M
Name Holding Trade Value Shares
Change 		Change in
Stake
Jane Street
26
Jane Street
New York
$1.09M +$576K +178,645 +89%
Victory Capital Management
27
Victory Capital Management
Texas
$1.01M -$16.4K -5,083 -1%
State of Wisconsin Investment Board
28
State of Wisconsin Investment Board
Wisconsin
$894K +$103K +31,877 +11%
GCP
29
GSA Capital Partners
United Kingdom
$828K +$230K +71,300 +33%
Commonwealth Equity Services
30
Commonwealth Equity Services
Massachusetts
$820K -$3.23K -1,000 -0.3%
PRCP
31
Pacific Ridge Capital Partners
Oregon
$709K +$34.8K +10,800 +5%
American Century Companies
32
American Century Companies
Missouri
$616K +$18.9K +5,844 +3%
UBS AM
33
UBS AM
Illinois
$612K -$18.6K -5,762 -3%
Barclays
34
Barclays
United Kingdom
$583K +$154K +47,690 +31%
ECM
35
ExodusPoint Capital Management
New York
$571K +$639K +198,191 New
UBS Group
36
UBS Group
Switzerland
$551K +$96.4K +29,882 +19%
Swiss National Bank
37
Swiss National Bank
Switzerland
$534K – – –
N
38
Nuveen
North Carolina
$508K -$314K -97,245 -36%
Marshall Wace
39
Marshall Wace
United Kingdom
$500K -$556K -172,393 -50%
Invesco
40
Invesco
Georgia
$486K -$12.7K -3,951 -2%
VOYA Investment Management
41
VOYA Investment Management
Georgia
$431K +$8.45K +2,618 +2%
Bank of America
42
Bank of America
North Carolina
$425K +$185K +57,203 +63%
SEI Investments
43
SEI Investments
Pennsylvania
$403K +$141K +43,775 +45%
LSV Asset Management
44
LSV Asset Management
Illinois
$391K – – –
Ameriprise
45
Ameriprise
Minnesota
$371K +$93.3K +28,911 +29%
RhumbLine Advisers
46
RhumbLine Advisers
Massachusetts
$369K -$108K -33,528 -21%
EC
47
EntryPoint Capital
New York
$359K +$298K +92,250 +285%
AllianceBernstein
48
AllianceBernstein
Tennessee
$343K -$216 -67 -0.1%
Wells Fargo
49
Wells Fargo
California
$319K +$107K +33,156 +43%
SPS
50
Susquehanna Portfolio Strategies
Pennsylvania
$316K – – –
1
2
3 4 5

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.