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Ribbon Communications
RBBN

Overview Fund Activity

144 hedge funds and large institutions have $509M invested in Ribbon Communications in 2025 Q2 according to their latest regulatory filings, with 22 funds opening new positions, 59 increasing their positions, 35 reducing their positions, and 20 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
144
Holders Change
+1
Holders Change %
+0.7%
% of All Funds
1.93%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
22
Increased
59
Reduced
35
Closed
20
Calls
$926K
Puts
–
Net Calls
+$926K
Net Calls Change
-$40K

Top Buyers

1
Millennium Management
Millennium Management
New York
+$2.35M
2
RA
Royce & Associates
New York
+$2.33M
3
Connor, Clark & Lunn Investment Management (CC&L)
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
+$1.15M
4
Northern Trust
Northern Trust
Illinois
+$770K
5
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
+$769K

Top Sellers

1
PCMI
Paradigm Capital Management Inc
New York
-$3.06M
2
HIM
Hillsdale Investment Management
Ontario, Canada
-$1.28M
3
Bank of America
Bank of America
North Carolina
-$868K
4
II
Inspire Investing
Idaho
-$756K
5
BCM
Bridgeway Capital Management
Texas
-$698K
Name Holding Trade Value Shares
Change 		Shares
Change %
Bank of New York Mellon
26
Bank of New York Mellon
New York
$1.32M +$34.5K +8,596 +3%
Commonwealth Equity Services
27
Commonwealth Equity Services
Massachusetts
$1.16M +$4.01K +1,000 +0.3%
State of Wisconsin Investment Board
28
State of Wisconsin Investment Board
Wisconsin
$1.11M +$307K +76,619 +38%
NL
29
Nuveen LLC
North Carolina
$1.08M -$246K -61,273 -19%
UBS Group
30
UBS Group
Switzerland
$1.08M +$263K +65,682 +32%
Morgan Stanley
31
Morgan Stanley
New York
$1.03M -$545K -135,904 -35%
Goldman Sachs
32
Goldman Sachs
New York
$973K -$460K -114,629 -32%
PRCP
33
Pacific Ridge Capital Partners
Oregon
$944K – – –
AQR Capital Management
34
AQR Capital Management
Connecticut
$903K +$79.5K +19,813 +10%
GCP
35
GSA Capital Partners
United Kingdom
$843K +$668K +166,428 +381%
Russell Investments Group
36
Russell Investments Group
United Kingdom
$815K +$59.3K +14,788 +8%
Barclays
37
Barclays
United Kingdom
$802K +$262K +65,307 +48%
Swiss National Bank
38
Swiss National Bank
Switzerland
$744K – – –
American Century Companies
39
American Century Companies
Missouri
$738K +$152K +37,871 +26%
RhumbLine Advisers
40
RhumbLine Advisers
Massachusetts
$708K +$93.9K +23,409 +15%
Invesco
41
Invesco
Georgia
$679K -$69.4K -17,310 -9%
VOYA Investment Management
42
VOYA Investment Management
Georgia
$663K -$9.21K -2,296 -1%
Ameriprise
43
Ameriprise
Minnesota
$596K +$47.3K +11,789 +9%
BAM
44
Bosun Asset Management
Illinois
$523K +$35.6K +8,866 +7%
Polen Capital Management
45
Polen Capital Management
Florida
$522K +$522K +130,188 New
PCM
46
Penn Capital Management
Pennsylvania
$480K +$122K +30,516 +34%
Susquehanna International Group
47
Susquehanna International Group
Pennsylvania
$468K +$16.2K +4,040 +4%
Verition Fund Management
48
Verition Fund Management
Connecticut
$467K +$467K +116,427 New
AllianceBernstein
49
AllianceBernstein
Tennessee
$454K +$57.9K +14,430 +15%
Bank of America
50
Bank of America
North Carolina
$420K -$868K -216,426 -67%
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