Citadel Advisors
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Citadel Advisors’s Cogent Communications CCOI Stock Holding History

Citadel Advisors’s Portfolio CCOI Stock Details CCOI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$8.03M Buy
426,280
+259,156
+155% +$5.71M ﹤0.01% 3581
2025
Q4 		$3.6M Buy
167,124
+85,219
+104% +$2.52M ﹤0.01% 4828
2025
Q3 		$3.14M Sell
81,905
-168,940
-67% -$7.05M ﹤0.01% 5228
2025
Q2 		$12.1M Buy
250,845
+199,609
+390% +$10.1M ﹤0.01% 2769
2025
Q1 		$3.14M Sell
51,236
-267,197
-84% -$19.7M ﹤0.01% 4681
2024
Q4 		$24.5M Sell
318,433
-7,524
-2% -$600K ﹤0.01% 1943
2024
Q3 		$24.7M Buy
325,957
+215,963
+196% +$14.9M ﹤0.01% 1833
2024
Q2 		$6.21M Sell
109,994
-44,493
-29% -$2.66M ﹤0.01% 3418
2024
Q1 		$10.1M Sell
154,487
-392,907
-72% -$28.7M ﹤0.01% 2948
2023
Q4 		$41.6M Buy
547,394
+538,883
+6,332% +$36M 0.01% 1328
2023
Q3 		$527K Sell
8,511
-237,558
-97% -$15.5M ﹤0.01% 7948
2023
Q2 		$16.6M Sell
246,069
-10,721
-4% -$700K ﹤0.01% 2081
2023
Q1 		$16.4M Sell
256,790
-314,512
-55% -$20.2M ﹤0.01% 2161
2022
Q4 		$32.6M Sell
571,302
-112,925
-17% -$6.2M 0.01% 1484
2022
Q3 		$35.7M Buy
684,227
+103,439
+18% +$5.96M 0.01% 1330
2022
Q2 		$35.3M Buy
+580,788
New +$35.7M 0.01% 1313
2022
Q1 		– Sell
-40,502
Closed -$2.6M – 13654
2021
Q4 		$2.96M Sell
40,502
-1,777
-4% -$134K ﹤0.01% 5360
2021
Q3 		$3M Buy
42,279
+28,543
+208% +$2.12M ﹤0.01% 5369
2021
Q2 		$1.06M Buy
13,736
+10,717
+355% +$796K ﹤0.01% 8225
2021
Q1 		$208K Sell
3,019
-237,001
-99% -$14.5M ﹤0.01% 11615
2020
Q4 		$14.4M Buy
240,020
+63,266
+36% +$3.74M ﹤0.01% 2181
2020
Q3 		$10.6M Buy
176,754
+140,208
+384% +$10.2M ﹤0.01% 2222
2020
Q2 		$2.83M Buy
36,546
+24,998
+216% +$2.02M ﹤0.01% 3959
2020
Q1 		$947K Sell
11,548
-23,411
-67% -$1.77M ﹤0.01% 5431
2019
Q4 		$2.3M Sell
34,959
-31,937
-48% -$1.93M ﹤0.01% 4182
2019
Q3 		$3.69M Buy
66,896
+56,831
+565% +$3.39M ﹤0.01% 3541
2019
Q2 		$598K Sell
10,065
-55,500
-85% -$3.19M ﹤0.01% 6548
2019
Q1 		$3.56M Buy
65,565
+22,929
+54% +$1.13M ﹤0.01% 3490
2018
Q4 		$1.93M Buy
+42,636
New +$2.11M ﹤0.01% 4206
2017
Q3 		– Sell
-29,595
Closed -$1.31M – 7558
2017
Q2 		$1.19M Buy
29,595
+21,253
+255% +$880K ﹤0.01% 3845
2017
Q1 		$359K Sell
8,342
-117,089
-93% -$4.88M ﹤0.01% 5595
2016
Q4 		$5.19M Buy
125,431
+63,271
+102% +$2.41M 0.01% 1960
2016
Q3 		$2.29M Buy
+62,160
New +$2.4M ﹤0.01% 2814
2016
Q2 		– Sell
-131,655
Closed -$5.17M – 6853
2016
Q1 		$5.14M Buy
131,655
+106,288
+419% +$3.68M 0.01% 1745
2015
Q4 		$880K Sell
25,367
-189,704
-88% -$6.13M ﹤0.01% 3738
2015
Q3 		$5.84M Sell
215,071
-45,783
-18% -$1.35M 0.01% 1793
2015
Q2 		$8.83M Buy
260,854
+85,785
+49% +$2.87M 0.01% 1560
2015
Q1 		$6.18M Sell
175,069
-260,970
-60% -$9.54M 0.01% 1820
2014
Q4 		$15.4M Sell
436,039
-58,800
-12% -$1.97M 0.02% 1114
2014
Q3 		$16.6M Sell
494,839
-149,116
-23% -$5.09M 0.02% 1018
2014
Q2 		$22.2M Buy
643,955
+76,867
+14% +$2.72M 0.03% 745
2014
Q1 		$20.1M Buy
567,088
+6,596
+1% +$258K 0.02% 826
2013
Q4 		$22.6M Sell
560,492
-65,373
-10% -$2.38M 0.03% 737
2013
Q3 		$20.2M Buy
625,865
+201,048
+47% +$6.17M 0.03% 716
2013
Q2 		$12M Buy
+424,817
New +$11.9M 0.02% 956

Other funds holding CCOI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
TCAM
Turtle Creek Asset Management Toronto, Ontario, Canada $2.67B AUM 0.64% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
EIG
EdgePoint Investment Group Toronto, Ontario, Canada $12.5B AUM 31.7% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
PWAM
Park West Asset Management San Francisco, California $1.18B AUM 47.25% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
NM
Newtyn Management New York $936M AUM 27.23% 1-Year Est. Return
MG
Magnolia Group Omaha, Nebraska $538M AUM 5.13% 1-Year Est. Return

Citadel Advisors's CCOI Position: Q1 2026 in Review

Citadel Advisors increased its Cogent Communications (CCOI) stake by 155% in Q1 2026, buying an estimated $5.71M and bringing the position to 426,280 shares worth $8.03M. The position accounts for ﹤0.01% of the portfolio, ranked #3581.

Citadel Advisors first reported a position in CCOI in Q2 2013 and has held it in 45 quarters since. The position peaked at $41.6M in Q4 2023. 233 funds tracked by Wall St. Rank hold CCOI as of Q1 2026.

  • Citadel Advisors held 426,280 shares of Cogent Communications worth $8.03M as of Q1 2026.
  • Citadel Advisors bought 259,156 Cogent Communications shares in Q1 2026, an estimated $5.71M.
  • Cogent Communications made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #3581 holding.
  • Citadel Advisors first reported a position in Cogent Communications in Q2 2013 and has held it in 45 quarters since.
  • Citadel Advisors's Cogent Communications position peaked at $41.6M in Q4 2023.
  • 233 funds tracked by Wall St. Rank held Cogent Communications as of Q1 2026.

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