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Ribbon Communications

Name Holding Trade Value Shares
Change
Change in
Stake
Luther King Capital Management (LKCM)
101
Luther King Capital Management (LKCM)
Texas
– -$1.29M -252,200 Closed
Arrowstreet Capital
102
Arrowstreet Capital
Massachusetts
– -$1.13M -221,148 Closed
SIM
103
Spark Investment Management
New York
– -$731K -143,400 Closed
ZIM
104
Zacks Investment Management
Illinois
– -$516K -101,084 Closed
TEE
105
Tibra Equities Europe
United Kingdom
– -$512K -100,410 Closed
EGM
106
Engineers Gate Manager
New York
– -$314K -61,656 Closed
PP
107
Paloma Partners
Connecticut
– -$223K -43,878 Closed
FQ
108
First Quadrant
California
– -$223K -43,804 Closed
HF
109
HRT Financial
New York
– -$165K -32,400 Closed
Jane Street
110
Jane Street
New York
– -$141K -27,669 Closed
FRM
111
Fox Run Management
Connecticut
– -$126K -24,751 Closed
SG Americas Securities
112
SG Americas Securities
New York
– -$116K -22,793 Closed
CSS
113
Cubist Systematic Strategies
Connecticut
– -$95K -18,664 Closed
CCIA
114
Campbell & Co Investment Adviser
Maryland
– -$72K -14,100 Closed
ACI
115
AMP Capital Investors
Australia
– -$71K -14,008 Closed
HCM
116
Highbridge Capital Management
New York
– -$61K -11,906 Closed
Pacer Advisors
117
Pacer Advisors
Pennsylvania
– -$51K -10,068 Closed
OSNBOA
118
Old Second National Bank of Aurora
Illinois
– -$51K -10,000 Closed
MLICM
119
Metropolitan Life Insurance Company (MetLife)
New York
– -$50.3K -9,870 Closed
Group One Trading
120
Group One Trading
Illinois
– -$38.6K -6,591 Closed
MIM
121
MetLife Investment Management
New Jersey
– -$17K -3,429 Closed
PCM
122
Prelude Capital Management
New York
– -$11K -2,080 Closed
QT
123
Quantbot Technologies
New York
– -$3K -693 Closed
WAM
124
Wealthspire Advisors (Maryland)
Maryland
– -$3K -540 Closed
SWP
125
Stratos Wealth Partners
Ohio
– -$2K -400 Closed