Marshall Wace
RBBN icon

Marshall Wace’s Ribbon Communications RBBN Stock Holding History

Marshall Wace’s Portfolio RBBN Stock Details RBBN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$1.63M Buy
769,787
+596,085
+343% +$1.43M ﹤0.01% 1895
2025
Q4 		$500K Sell
173,702
-172,393
-50% -$556K ﹤0.01% 2235
2025
Q3 		$1.32M Buy
+346,095
New +$1.36M ﹤0.01% 1816
2022
Q3 		– Sell
-104,654
Closed -$318K – 3716
2022
Q2 		$318K Sell
104,654
-125,870
-55% -$380K ﹤0.01% 3005
2022
Q1 		$712K Buy
+230,524
New +$945K ﹤0.01% 2610
2021
Q2 		– Sell
-18,082
Closed -$148K – 3010
2021
Q1 		$148K Buy
+18,082
New +$150K ﹤0.01% 2317
2016
Q1 		– Sell
-35,912
Closed -$256K – 1169
2015
Q4 		$256K Buy
+35,912
New +$241K ﹤0.01% 892
2015
Q3 		– Sell
-269,653
Closed -$1.87M – 1028
2015
Q2 		$1.87M Buy
+269,653
New +$2.11M 0.02% 490
2015
Q1 		– Sell
-204,165
Closed -$4.05M – 916
2014
Q4 		$4.05M Buy
204,165
+79,001
+63% +$1.4M 0.05% 342
2014
Q3 		$2.14M Sell
125,164
-136,536
-52% -$2.61M 0.03% 434
2014
Q2 		$4.7M Sell
261,700
-214,381
-45% -$3.63M 0.07% 272
2014
Q1 		$8.02M Buy
+476,081
New +$7.91M 0.15% 175

Other funds holding RBBN

JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $131B AUM 28.36% 1-Year Est. Return
PCMI
Paradigm Capital Management Inc Albany, New York $2.61B AUM 78.58% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
RA
Royce & Associates New York $10.1B AUM 42.88% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Connor, Clark & Lunn Investment Management (CC&L)
Connor, Clark & Lunn Investment Management (CC&L) Vancouver, British Columbia, Canada $43.4B AUM 51.29% 1-Year Est. Return

Marshall Wace's RBBN Position: Q1 2026 in Review

Marshall Wace increased its Ribbon Communications (RBBN) stake by 343% in Q1 2026, buying an estimated $1.43M and bringing the position to 769,787 shares worth $1.63M. The position accounts for ﹤0.01% of the portfolio, ranked #1895.

Marshall Wace first reported a position in RBBN in Q1 2014 and has held it in 12 quarters since. The position peaked at $8.02M in Q1 2014. 150 funds tracked by Wall St. Rank hold RBBN as of Q1 2026.

  • Marshall Wace held 769,787 shares of Ribbon Communications worth $1.63M as of Q1 2026.
  • Marshall Wace bought 596,085 Ribbon Communications shares in Q1 2026, an estimated $1.43M.
  • Ribbon Communications made up ﹤0.01% of Marshall Wace's portfolio in Q1 2026, its #1895 holding.
  • Marshall Wace first reported a position in Ribbon Communications in Q1 2014 and has held it in 12 quarters since.
  • Marshall Wace's Ribbon Communications position peaked at $8.02M in Q1 2014.
  • 150 funds tracked by Wall St. Rank held Ribbon Communications as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.