Citadel Advisors’s Ribbon Communications RBBN Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$1.22M Buy
574,989
+521,086
+967% +$1.25M ﹤0.01% 7220
2025
Q4
$155K Sell
53,903
-1,651
-3% -$5.33K ﹤0.01% 11277
2025
Q3
$211K Buy
+55,554
New +$218K ﹤0.01% 11157
2025
Q1
Sell
-132,280
Closed -$557K 15382
2024
Q4
$550K Buy
132,280
+51,024
+63% +$193K ﹤0.01% 8347
2024
Q3
$264K Sell
81,256
-154,423
-66% -$501K ﹤0.01% 9576
2024
Q2
$775K Buy
235,679
+160,479
+213% +$488K ﹤0.01% 7119
2024
Q1
$241K Buy
75,200
+4,738
+7% +$14.4K ﹤0.01% 9936
2023
Q4
$204K Buy
70,462
+13,712
+24% +$30.9K ﹤0.01% 9908
2023
Q3
$152K Sell
56,750
-177,340
-76% -$518K ﹤0.01% 10330
2023
Q2
$653K Sell
234,090
-305,237
-57% -$847K ﹤0.01% 7347
2023
Q1
$1.84M Buy
539,327
+499,792
+1,264% +$1.83M ﹤0.01% 5540
2022
Q4
$110K Buy
39,535
+13,948
+55% +$36.1K ﹤0.01% 11083
2022
Q3
$57K Sell
25,587
-2,596
-9% -$8.22K ﹤0.01% 11531
2022
Q2
$86K Sell
28,183
-220,762
-89% -$667K ﹤0.01% 11540
2022
Q1
$769K Buy
248,945
+215,684
+648% +$884K ﹤0.01% 8327
2021
Q4
$201K Buy
33,261
+17,156
+107% +$102K ﹤0.01% 11849
2021
Q3
$96K Sell
16,105
-52,262
-76% -$353K ﹤0.01% 12929
2021
Q2
$521K Buy
68,367
+51,729
+311% +$396K ﹤0.01% 9982
2021
Q1
$137K Buy
+16,638
New +$138K ﹤0.01% 12152
2020
Q2
Sell
-76,664
Closed -$278K 10373
2020
Q1
$232K Buy
+76,664
New +$230K ﹤0.01% 7754
2019
Q3
Sell
-20,226
Closed -$99K 9653
2019
Q2
$99K Sell
20,226
-124,699
-86% -$609K ﹤0.01% 8536
2019
Q1
$746K Buy
144,925
+74,089
+105% +$397K ﹤0.01% 6110
2018
Q4
$341K Buy
70,836
+13,928
+24% +$80.7K ﹤0.01% 7041
2018
Q3
$388K Sell
56,908
-81,225
-59% -$578K ﹤0.01% 7131
2018
Q2
$983K Sell
138,133
-48,544
-26% -$284K ﹤0.01% 5247
2018
Q1
$952K Buy
186,677
+115,264
+161% +$746K ﹤0.01% 4886
2017
Q4
$552K Sell
71,413
-34,051
-32% -$261K ﹤0.01% 5505
2017
Q3
$806K Buy
105,464
+21,537
+26% +$154K ﹤0.01% 4621
2017
Q2
$624K Sell
83,927
-125,539
-60% -$925K ﹤0.01% 4803
2017
Q1
$1.38M Buy
209,466
+38,202
+22% +$242K ﹤0.01% 3540
2016
Q4
$1.08M Buy
171,264
+139,732
+443% +$918K ﹤0.01% 3746
2016
Q3
$245K Sell
31,532
-1,369
-4% -$12K ﹤0.01% 6004
2016
Q2
$286K Buy
32,901
+22,300
+210% +$186K ﹤0.01% 5284
2016
Q1
$80K Sell
10,601
-140,297
-93% -$938K ﹤0.01% 6110
2015
Q4
$1.08M Sell
150,898
-220,998
-59% -$1.48M ﹤0.01% 3472
2015
Q3
$2.13M Buy
371,896
+256,627
+223% +$1.73M ﹤0.01% 2858
2015
Q2
$798K Sell
115,269
-138,471
-55% -$1.09M ﹤0.01% 4285
2015
Q1
$2M Buy
253,740
+132,610
+109% +$2.18M ﹤0.01% 3064
2014
Q4
$2.4M Buy
121,130
+83,866
+225% +$1.48M ﹤0.01% 2696
2014
Q3
$638K Sell
37,264
-79,889
-68% -$1.52M ﹤0.01% 4312
2014
Q2
$2.1M Buy
117,153
+7,002
+6% +$118K ﹤0.01% 2690
2014
Q1
$1.86M Buy
110,151
+74,608
+210% +$1.24M ﹤0.01% 2732
2013
Q4
$560K Buy
35,543
+20,930
+143% +$323K ﹤0.01% 3872
2013
Q3
$247K Buy
14,613
+12,291
+529% +$209K ﹤0.01% 4557
2013
Q2
$35K Buy
+2,322
New +$31K ﹤0.01% 5828

Other funds holding RBBN

Citadel Advisors's RBBN Position: Q1 2026 in Review

Citadel Advisors increased its Ribbon Communications (RBBN) stake by 967% in Q1 2026, buying an estimated $1.25M and bringing the position to 574,989 shares worth $1.22M. The position accounts for ﹤0.01% of the portfolio, ranked #7220.

Citadel Advisors first reported a position in RBBN in Q2 2013 and has held it in 45 quarters since. The position peaked at $2.4M in Q4 2014. 150 funds tracked by Wall St. Rank hold RBBN as of Q1 2026.

  • Citadel Advisors held 574,989 shares of Ribbon Communications worth $1.22M as of Q1 2026.
  • Citadel Advisors bought 521,086 Ribbon Communications shares in Q1 2026, an estimated $1.25M.
  • Ribbon Communications made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #7220 holding.
  • Citadel Advisors first reported a position in Ribbon Communications in Q2 2013 and has held it in 45 quarters since.
  • Citadel Advisors's Ribbon Communications position peaked at $2.4M in Q4 2014.
  • 150 funds tracked by Wall St. Rank held Ribbon Communications as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.