Dimensional Fund Advisors
RBBN icon

Dimensional Fund Advisors’s Ribbon Communications RBBN Stock Holding History

Dimensional Fund Advisors’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 		$13.5M Sell
6,351,110
-124,015
-2% -$297K ﹤0.01% 2146
2025
Q4 		$18.6M Sell
6,475,125
-70,410
-1% -$227K ﹤0.01% 2001
2025
Q3 		$24.9M Sell
6,545,535
-19,631
-0.3% -$77.1K 0.01% 1881
2025
Q2 		$26.3M Buy
6,565,166
+191,831
+3% +$691K 0.01% 1843
2025
Q1 		$25M Buy
6,373,335
+58,666
+0.9% +$247K 0.01% 1837
2024
Q4 		$26.3M Buy
6,314,669
+302,039
+5% +$1.14M 0.01% 1874
2024
Q3 		$19.5M Buy
6,012,630
+233,214
+4% +$757K ﹤0.01% 2011
2024
Q2 		$19M Buy
5,779,416
+270,972
+5% +$824K 0.01% 1976
2024
Q1 		$17.6M Buy
5,508,444
+352,875
+7% +$1.07M ﹤0.01% 2055
2023
Q4 		$15M Buy
5,155,569
+233,501
+5% +$526K ﹤0.01% 2129
2023
Q3 		$13.2M Buy
4,922,068
+369,097
+8% +$1.08M ﹤0.01% 2111
2023
Q2 		$12.7M Buy
4,552,971
+585,999
+15% +$1.63M ﹤0.01% 2148
2023
Q1 		$13.6M Buy
3,966,972
+149,207
+4% +$545K ﹤0.01% 2091
2022
Q4 		$10.7K Buy
3,817,765
+163,291
+4% +$423K ﹤0.01% 2174
2022
Q3 		$8.11M Buy
3,654,474
+26,827
+0.7% +$85K ﹤0.01% 2245
2022
Q2 		$11M Sell
3,627,647
-77,024
-2% -$233K ﹤0.01% 2149
2022
Q1 		$11.4M Buy
3,704,671
+72,194
+2% +$296K ﹤0.01% 2230
2021
Q4 		$22M Sell
3,632,477
-73,787
-2% -$438K 0.01% 1930
2021
Q3 		$22.2M Sell
3,706,264
-32,269
-0.9% -$218K 0.01% 1950
2021
Q2 		$28.5M Buy
3,738,533
+151,051
+4% +$1.16M 0.01% 1874
2021
Q1 		$29.5M Sell
3,587,482
-221,185
-6% -$1.83M 0.01% 1821
2020
Q4 		$25M Sell
3,808,667
-27,203
-0.7% -$144K 0.01% 1863
2020
Q3 		$14.8M Buy
3,835,870
+50,901
+1% +$215K 0.01% 2009
2020
Q2 		$14.9M Sell
3,784,969
-171,898
-4% -$624K 0.01% 2024
2020
Q1 		$12M Sell
3,956,867
-17,690
-0.4% -$53.2K 0.01% 2024
2019
Q4 		$12.3M Sell
3,974,557
-20,813
-0.5% -$82.8K ﹤0.01% 2275
2019
Q3 		$23.3M Buy
3,995,370
+19,500
+0.5% +$102K 0.01% 1910
2019
Q2 		$19.4M Buy
3,975,870
+54,374
+1% +$266K 0.01% 2061
2019
Q1 		$20.2M Buy
3,921,496
+115,574
+3% +$619K 0.01% 2047
2018
Q4 		$18.3M Buy
3,805,922
+215,975
+6% +$1.25M 0.01% 2023
2018
Q3 		$24.5M Buy
3,589,947
+240,295
+7% +$1.71M 0.01% 1998
2018
Q2 		$23.8M Buy
3,349,652
+155,747
+5% +$912K 0.01% 2016
2018
Q1 		$16.3M Buy
3,193,905
+14,570
+0.5% +$94.3K 0.01% 2164
2017
Q4 		$24.6M Buy
3,179,335
+12,579
+0.4% +$96.6K 0.01% 1953
2017
Q3 		$24.2M Buy
3,166,756
+16,400
+0.5% +$117K 0.01% 1926
2017
Q2 		$23.4M Buy
3,150,356
+444,006
+16% +$3.27M 0.01% 1933
2017
Q1 		$17.8M Buy
2,706,350
+251,934
+10% +$1.6M 0.01% 2059
2016
Q4 		$15.5M Buy
2,454,416
+180,013
+8% +$1.18M 0.01% 2112
2016
Q3 		$17.7M Buy
2,274,403
+234,904
+12% +$2.05M 0.01% 2004
2016
Q2 		$17.7M Buy
2,039,499
+138,116
+7% +$1.15M 0.01% 1941
2016
Q1 		$14.3M Buy
1,901,383
+259,759
+16% +$1.74M 0.01% 2034
2015
Q4 		$11.7M Buy
1,641,624
+342,192
+26% +$2.3M 0.01% 2134
2015
Q3 		$7.43M Sell
1,299,432
-7,599
-0.6% -$51.2K ﹤0.01% 2353
2015
Q2 		$9.04M Sell
1,307,031
-77,681
-6% -$609K 0.01% 2316
2015
Q1 		$10.9M Sell
1,384,712
-36,052
-3% -$594K 0.01% 2196
2014
Q4 		$28.2M Sell
1,420,764
-102,165
-7% -$1.81M 0.02% 1368
2014
Q3 		$26M Sell
1,522,929
-105,229
-6% -$2.01M 0.02% 1337
2014
Q2 		$29.2M Buy
1,628,158
+35,711
+2% +$604K 0.02% 1233
2014
Q1 		$26.8M Sell
1,592,447
-25,204
-2% -$419K 0.02% 1261
2013
Q4 		$25.5M Buy
1,617,651
+59,139
+4% +$913K 0.02% 1270
2013
Q3 		$26.3M Buy
1,558,512
+62,900
+4% +$1.07M 0.02% 1090
2013
Q2 		$22.5M Buy
+1,495,612
New +$20M 0.02% 1139

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
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
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Dimensional Fund Advisors's RBBN Position: Q1 2026 in Review

Dimensional Fund Advisors reduced its Ribbon Communications (RBBN) stake by 1.9% in Q1 2026, selling an estimated $297K and leaving 6,351,110 shares worth $13.5M. The position accounts for ﹤0.01% of the portfolio, ranked #2146.

Dimensional Fund Advisors first reported a position in RBBN in Q2 2013 and has held it in 52 quarters since. The position peaked at $29.5M in Q1 2021. 150 funds tracked by Wall St. Rank hold RBBN as of Q1 2026.

  • Dimensional Fund Advisors held 6,351,110 shares of Ribbon Communications worth $13.5M as of Q1 2026.
  • Dimensional Fund Advisors sold 124,015 Ribbon Communications shares in Q1 2026, an estimated $297K.
  • Ribbon Communications made up ﹤0.01% of Dimensional Fund Advisors's portfolio in Q1 2026, its #2146 holding.
  • Dimensional Fund Advisors first reported a position in Ribbon Communications in Q2 2013 and has held it in 52 quarters since.
  • Dimensional Fund Advisors's Ribbon Communications position peaked at $29.5M in Q1 2021.
  • 150 funds tracked by Wall St. Rank held Ribbon Communications as of Q1 2026.

Based on Dimensional Fund Advisors's 13F filing for Q1 2026, filed 7 May 2026.