Acadian Asset Management
RBBN icon

Acadian Asset Management’s Ribbon Communications RBBN Stock Holding History

Acadian Asset 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 		$4.13M Buy
1,768,227
+329,737
+23% +$870K ﹤0.01% 858
2026
Q1 		$3.04M Buy
1,438,490
+677,325
+89% +$1.62M ﹤0.01% 834
2025
Q4 		$2.19M Buy
761,165
+726,573
+2,100% +$2.34M ﹤0.01% 896
2025
Q3 		$131K Buy
+34,592
New +$136K ﹤0.01% 1470
2024
Q1 		– Sell
-149,824
Closed -$433K – 1743
2023
Q4 		$433K Sell
149,824
-198,666
-57% -$448K ﹤0.01% 1055
2023
Q3 		$932K Sell
348,490
-274,004
-44% -$800K ﹤0.01% 868
2023
Q2 		$1.74M Buy
622,494
+345,590
+125% +$959K 0.01% 735
2023
Q1 		$944K Buy
276,904
+241,900
+691% +$884K ﹤0.01% 888
2022
Q4 		$97K Buy
35,004
+20,718
+145% +$53.7K ﹤0.01% 1439
2022
Q3 		$30K Sell
14,286
-81,811
-85% -$259K ﹤0.01% 1560
2022
Q2 		$292K Buy
+96,097
New +$290K ﹤0.01% 1108
2020
Q4 		– Sell
-13,305
Closed -$51K – 2328
2020
Q3 		$51K Sell
13,305
-248,449
-95% -$1.05M ﹤0.01% 1855
2020
Q2 		$1.03M Sell
261,754
-236,811
-47% -$860K ﹤0.01% 954
2020
Q1 		$1.51M Buy
498,565
+174,015
+54% +$523K 0.01% 675
2019
Q4 		$1.01M Buy
324,550
+269,917
+494% +$1.07M ﹤0.01% 876
2019
Q3 		$319K Buy
+54,633
New +$287K ﹤0.01% 1202
2019
Q2 		– Sell
-24,960
Closed -$128K – 2003
2019
Q1 		$128K Buy
+24,960
New +$134K ﹤0.01% 1463
2017
Q2 		– Sell
-4,133
Closed -$27K – 1557
2017
Q1 		$27K Hold
4,133
– – ﹤0.01% 1326
2016
Q4 		$26K Sell
4,133
-26,253
-86% -$172K ﹤0.01% 1276
2016
Q3 		$236K Buy
+30,386
New +$266K ﹤0.01% 939

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

Acadian Asset Management's RBBN Position: Q2 2026 in Review

Acadian Asset Management increased its Ribbon Communications (RBBN) stake by 23% in Q2 2026, buying an estimated $870K and bringing the position to 1,768,227 shares worth $4.13M. The position accounts for ﹤0.01% of the portfolio, ranked #858.

Acadian Asset Management first reported a position in RBBN in Q3 2016 and has held it in 20 quarters since. 160 funds tracked by Wall St. Rank hold RBBN as of Q2 2026.

  • Acadian Asset Management held 1,768,227 shares of Ribbon Communications worth $4.13M as of Q2 2026.
  • Acadian Asset Management bought 329,737 Ribbon Communications shares in Q2 2026, an estimated $870K.
  • Ribbon Communications made up ﹤0.01% of Acadian Asset Management's portfolio in Q2 2026, its #858 holding.
  • Acadian Asset Management first reported a position in Ribbon Communications in Q3 2016 and has held it in 20 quarters since.
  • 160 funds tracked by Wall St. Rank held Ribbon Communications as of Q2 2026.

Based on Acadian Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.