PCM
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Polymer Capital Management’s Ribbon Communications RBBN Stock Holding History

Polymer Capital 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 		$66.4K Sell
28,355
-3,522
-11% -$9.3K 0.01% 598
2026
Q1 		$67.6K Buy
+31,877
New +$76.3K 0.01% 796
2025
Q3 		– Sell
-17,417
Closed -$69.8K – 915
2025
Q2 		$69.8K Sell
17,417
-42,150
-71% -$152K 0.01% 592
2025
Q1 		$234K Buy
59,567
+46,268
+348% +$195K 0.06% 411
2024
Q4 		$55.3K Buy
+13,299
New +$50.2K 0.02% 350

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
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T 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

Polymer Capital Management's RBBN Position: Q2 2026 in Review

Polymer Capital Management reduced its Ribbon Communications (RBBN) stake by 11% in Q2 2026, selling an estimated $9.3K and leaving 28,355 shares worth $66.4K. The position accounts for 0.01% of the portfolio, ranked #598.

Polymer Capital Management first reported a position in RBBN in Q4 2024 and has held it in 5 quarters since. The position peaked at $234K in Q1 2025. 160 funds tracked by Wall St. Rank hold RBBN as of Q2 2026.

  • Polymer Capital Management held 28,355 shares of Ribbon Communications worth $66.4K as of Q2 2026.
  • Polymer Capital Management sold 3,522 Ribbon Communications shares in Q2 2026, an estimated $9.3K.
  • Ribbon Communications made up 0.01% of Polymer Capital Management's portfolio in Q2 2026, its #598 holding.
  • Polymer Capital Management first reported a position in Ribbon Communications in Q4 2024 and has held it in 5 quarters since.
  • Polymer Capital Management's Ribbon Communications position peaked at $234K in Q1 2025.
  • 160 funds tracked by Wall St. Rank held Ribbon Communications as of Q2 2026.

Based on Polymer Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.