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Ribbon Communications
RBBN

Overview Fund Activity

143 hedge funds and large institutions have $495M invested in Ribbon Communications in 2025 Q1 according to their latest regulatory filings, with 28 funds opening new positions, 44 increasing their positions, 48 reducing their positions, and 16 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
143
Holders Change
+11
Holders Change %
+8.33%
% of All Funds
1.94%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
28
Increased
44
Reduced
48
Closed
16
Calls
$999K
Puts
$33K
Net Calls
+$966K
Net Calls Change
-$173K

Top Buyers

1
Connor, Clark & Lunn Investment Management (CC&L)
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
+$2.01M
2
HIM
Hillsdale Investment Management
Ontario, Canada
+$1.28M
3
Raymond James Financial
Raymond James Financial
Florida
+$1.16M
4
Commonwealth Equity Services
Commonwealth Equity Services
Massachusetts
+$1.13M
5
RA
Royce & Associates
New York
+$1.13M

Top Sellers

1
PCMI
Paradigm Capital Management Inc
New York
-$2.46M
2
Federated Hermes
Federated Hermes
Pennsylvania
-$1.32M
3
UBS Group
UBS Group
Switzerland
-$1.17M
4
HIM
Herald Investment Management
United Kingdom
-$826K
5
MIC
Maxi Investments CY
Cyprus
-$812K
Name Holding Trade Value Shares
Change 		Shares
Change %
Bank of America
26
Bank of America
North Carolina
$1.26M +$805K +205,406 +178%
Bank of New York Mellon
27
Bank of New York Mellon
New York
$1.25M -$31.4K -8,001 -2%
Raymond James Financial
28
Raymond James Financial
Florida
$1.16M +$1.16M +295,428 New
SBCM
29
Silverberg Bernstein Capital Management
New York
$1.15M -$88.3K -22,527 -7%
Commonwealth Equity Services
30
Commonwealth Equity Services
Massachusetts
$1.13M +$1.13M +289,276 New
UBS AM
31
UBS AM
Illinois
$1.12M -$750K -191,219 -40%
Millennium Management
32
Millennium Management
New York
$961K +$916K +233,646 +2,040%
PRCP
33
Pacific Ridge Capital Partners
Oregon
$922K -$7.82K -1,996 -0.8%
AQR Capital Management
34
AQR Capital Management
Connecticut
$805K +$805K +205,287 New
UBS Group
35
UBS Group
Switzerland
$797K -$1.17M -299,545 -60%
State of Wisconsin Investment Board
36
State of Wisconsin Investment Board
Wisconsin
$781K +$781K +199,284 New
II
37
Inspire Investing
Idaho
$756K -$39.5K -10,078 -5%
Russell Investments Group
38
Russell Investments Group
United Kingdom
$739K +$119K +30,328 +19%
Invesco
39
Invesco
Georgia
$732K -$90.6K -23,108 -11%
Swiss National Bank
40
Swiss National Bank
Switzerland
$727K – – –
BCM
41
Bridgeway Capital Management
Texas
$698K +$698K +178,000 New
VOYA Investment Management
42
VOYA Investment Management
Georgia
$658K +$203K +51,792 +45%
XT
43
XTX Topco
Cayman Islands
$619K +$619K +157,828 New
RhumbLine Advisers
44
RhumbLine Advisers
Massachusetts
$600K -$9.84K -2,511 -2%
Squarepoint
45
Squarepoint
New York
$599K +$81.5K +20,788 +16%
American Century Companies
46
American Century Companies
Missouri
$573K +$184K +46,903 +47%
Renaissance Technologies
47
Renaissance Technologies
New York
$568K +$512K +130,712 +927%
Ameriprise
48
Ameriprise
Minnesota
$537K +$1.18K +300 +0.2%
Barclays
49
Barclays
United Kingdom
$529K -$180K -45,809 -25%
BAM
50
Bosun Asset Management
Illinois
$476K +$476K +121,322 New
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