Simplex Trading
RBBN icon

Simplex Trading’s Ribbon Communications RBBN Stock Holding History

Simplex Trading’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
2024
Q3 		– Sell
-16,300
Closed -$53K – 9372
2024
Q2 		$53K Buy
16,300
+100
+0.6% +$304 ﹤0.01% 6034
2024
Q1 		$51K Sell
16,200
-5,000
-24% -$15.2K ﹤0.01% 6241
2023
Q4 		$61K Sell
21,200
-100
-0.5% -$225 ﹤0.01% 5905
2023
Q3 		$57K Sell
21,300
-100
-0.5% -$292 ﹤0.01% 5684
2023
Q2 		$59K Sell
21,400
-36,300
-63% -$101K ﹤0.01% 5670
2023
Q1 		$197K Buy
+57,700
New +$211K ﹤0.01% 4338
2022
Q1 		– Sell
-3,600
Closed -$21K – 11217
2021
Q4 		$21K Sell
3,600
-54,900
-94% -$326K ﹤0.01% 8319
2021
Q3 		$446K Hold
58,500
– – ﹤0.01% 4268
2021
Q2 		$445K Buy
58,500
+56,744
+3,231% +$434K ﹤0.01% 4347
2021
Q1 		$1.44M Buy
1,756
+139
+9% +$1.15K ﹤0.01% 1993
2020
Q4 		$1.06M Buy
+1,617
New +$8.54K ﹤0.01% 2478
2019
Q4 		– Sell
-24
Closed -$14K – 7848
2019
Q3 		$14K Sell
24
-207
-90% -$1.09K ﹤0.01% 6064
2019
Q2 		$112K Sell
231
-88
-28% -$430 ﹤0.01% 4069
2019
Q1 		$164K Buy
319
+231
+263% +$1.24K ﹤0.01% 3816
2018
Q4 		$42K Buy
+88
New +$510 ﹤0.01% 4692
2017
Q3 		– Sell
-28
Closed -$1K – 6502
2017
Q2 		$1K Buy
+28
New +$206 ﹤0.01% 5698
2015
Q3 		– Sell
-7
Closed -$2K – 6066
2015
Q2 		$2K Sell
7
-81
-92% -$635 ﹤0.01% 4334
2015
Q1 		$54K Buy
+88
New +$1.45K 0.01% 1503

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

Simplex Trading's RBBN Position: Q2 2026 in Review

Simplex Trading opened a new position in Ribbon Communications (RBBN) in Q2 2026: 73,875 shares worth $173K. The stake represents ﹤0.01% of the portfolio and ranks #4895 among its holdings. This is a return to the name: Simplex Trading previously reported a position in RBBN as recently as Q4 2025.

Simplex Trading first reported a position in RBBN in Q1 2015 and has held it in 35 quarters since. The position peaked at $434K in Q1 2021. 161 funds tracked by Wall St. Rank hold RBBN as of Q2 2026.

  • Simplex Trading held 73,875 shares of Ribbon Communications worth $173K as of Q2 2026.
  • Ribbon Communications was a new Simplex Trading position in Q2 2026.
  • Ribbon Communications made up ﹤0.01% of Simplex Trading's portfolio in Q2 2026, its #4895 holding.
  • Simplex Trading first reported a position in Ribbon Communications in Q1 2015 and has held it in 35 quarters since.
  • Simplex Trading's Ribbon Communications position peaked at $434K in Q1 2021.
  • 161 funds tracked by Wall St. Rank held Ribbon Communications as of Q2 2026.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.