D.E. Shaw & Co
RBBN icon

D.E. Shaw & Co’s Ribbon Communications RBBN Stock Holding History

D.E. Shaw & Co’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
2015
Q4 		– Sell
-50,000
Closed -$286K – 3954
2015
Q3 		$286K Hold
50,000
– – ﹤0.01% 3368
2015
Q2 		$346K Buy
+50,000
New +$392K ﹤0.01% 3357

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

D.E. Shaw & Co's RBBN Position: Q1 2026 in Review

D.E. Shaw & Co increased its Ribbon Communications (RBBN) stake by 57% in Q1 2026, buying an estimated $1.34M and bringing the position to 1,538,472 shares worth $3.26M. The position accounts for ﹤0.01% of the portfolio, ranked #2519.

D.E. Shaw & Co first reported a position in RBBN in Q2 2013 and has held it in 50 quarters since. The position peaked at $9.5M in Q2 2016. 150 funds tracked by Wall St. Rank hold RBBN as of Q1 2026.

  • D.E. Shaw & Co held 1,538,472 shares of Ribbon Communications worth $3.26M as of Q1 2026.
  • D.E. Shaw & Co bought 558,631 Ribbon Communications shares in Q1 2026, an estimated $1.34M.
  • Ribbon Communications made up ﹤0.01% of D.E. Shaw & Co's portfolio in Q1 2026, its #2519 holding.
  • D.E. Shaw & Co first reported a position in Ribbon Communications in Q2 2013 and has held it in 50 quarters since.
  • D.E. Shaw & Co's Ribbon Communications position peaked at $9.5M in Q2 2016.
  • 150 funds tracked by Wall St. Rank held Ribbon Communications as of Q1 2026.

Based on D.E. Shaw & Co's 13F filing for Q1 2026, filed 15 May 2026.