Vanguard Portfolio Management
RBBN icon

Vanguard Portfolio Management’s Ribbon Communications RBBN Stock Holding History

Vanguard Portfolio Management’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
Q2 		$8.22M Buy
3,513,067
+177,402
+5% +$468K ﹤0.01% 2264
2026
Q1 		$7.07M Buy
+3,335,665
New +$7.98M ﹤0.01% 2219

Other funds holding RBBN

JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
RA
Royce & Associates New York $12.4B AUM 64.17% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
PCMI
Paradigm Capital Management Inc Albany, New York $3.67B AUM 121.12% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Connor, Clark & Lunn Investment Management (CC&L)
Connor, Clark & Lunn Investment Management (CC&L) Vancouver, British Columbia, Canada $52.8B AUM 58.98% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Portfolio Management's RBBN Position: Q2 2026 in Review

Vanguard Portfolio Management increased its Ribbon Communications (RBBN) stake by 5.3% in Q2 2026, buying an estimated $468K and bringing the position to 3,513,067 shares worth $8.22M. The position accounts for ﹤0.01% of the portfolio, ranked #2264.

Vanguard Portfolio Management first reported a position in RBBN in Q1 2026 and has held it in 2 quarters since. 159 funds tracked by Wall St. Rank hold RBBN as of Q2 2026.

  • Vanguard Portfolio Management held 3,513,067 shares of Ribbon Communications worth $8.22M as of Q2 2026.
  • Vanguard Portfolio Management bought 177,402 Ribbon Communications shares in Q2 2026, an estimated $468K.
  • Ribbon Communications made up ﹤0.01% of Vanguard Portfolio Management's portfolio in Q2 2026, its #2264 holding.
  • Vanguard Portfolio Management first reported a position in Ribbon Communications in Q1 2026 and has held it in 2 quarters since.
  • 159 funds tracked by Wall St. Rank held Ribbon Communications as of Q2 2026.

Based on Vanguard Portfolio Management's 13F filing for Q2 2026, filed 13 Aug 2026.