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 		$9.97M Buy
529,000
+374,900
+243% +$8.26M ﹤0.01% 3262
2025
Q4 		$3.32M Buy
154,100
+98,300
+176% +$2.9M ﹤0.01% 4975
2025
Q3 		$2.14M Buy
55,800
+12,000
+27% +$501K ﹤0.01% 5938
2025
Q2 		$2.11M Sell
43,800
-49,800
-53% -$2.53M ﹤0.01% 5607
2025
Q1 		$5.74M Buy
93,600
+40,900
+78% +$3.02M ﹤0.01% 3659
2024
Q4 		$4.06M Sell
52,700
-128,700
-71% -$10.3M ﹤0.01% 4305
2024
Q3 		$13.8M Buy
181,400
+114,600
+172% +$7.89M ﹤0.01% 2479
2024
Q2 		$3.77M Buy
66,800
+41,400
+163% +$2.47M ﹤0.01% 4202
2024
Q1 		$1.66M Sell
25,400
-6,500
-20% -$474K ﹤0.01% 5891
2023
Q4 		$2.43M Sell
31,900
-8,000
-20% -$534K ﹤0.01% 5021
2023
Q3 		$2.47M Buy
39,900
+15,200
+62% +$994K ﹤0.01% 4842
2023
Q2 		$1.66M Buy
24,700
+6,100
+33% +$398K ﹤0.01% 5485
2023
Q1 		$1.19M Buy
18,600
+6,000
+48% +$386K ﹤0.01% 6414
2022
Q4 		$719K Sell
12,600
-34,100
-73% -$1.87M ﹤0.01% 7482
2022
Q3 		$2.44M Sell
46,700
-5,300
-10% -$306K ﹤0.01% 5210
2022
Q2 		$3.16M Buy
52,000
+14,400
+38% +$886K ﹤0.01% 4665
2022
Q1 		$2.5M Buy
37,600
+28,700
+322% +$1.84M ﹤0.01% 5608
2021
Q4 		$651K Sell
8,900
-23,600
-73% -$1.77M ﹤0.01% 9023
2021
Q3 		$2.3M Sell
32,500
-14,400
-31% -$1.07M ﹤0.01% 5991
2021
Q2 		$3.61M Sell
46,900
-26,300
-36% -$1.95M ﹤0.01% 5182
2021
Q1 		$5.03M Buy
73,200
+34,200
+88% +$2.09M ﹤0.01% 4245
2020
Q4 		$2.33M Buy
39,000
+12,200
+46% +$721K ﹤0.01% 5035
2020
Q3 		$1.61M Buy
26,800
+6,700
+33% +$489K ﹤0.01% 5138
2020
Q2 		$1.55M Sell
20,100
-5,700
-22% -$461K ﹤0.01% 5011
2020
Q1 		$2.12M Buy
25,800
+8,300
+47% +$628K ﹤0.01% 4048
2019
Q4 		$1.15M Sell
17,500
-2,100
-11% -$127K ﹤0.01% 5336
2019
Q3 		$1.08M Sell
19,600
-52,000
-73% -$3.1M ﹤0.01% 5464
2019
Q2 		$4.25M Buy
71,600
+5,800
+9% +$333K ﹤0.01% 3339
2019
Q1 		$3.57M Buy
65,800
+12,800
+24% +$630K ﹤0.01% 3484
2018
Q4 		$2.4M Buy
53,000
+48,900
+1,193% +$2.42M ﹤0.01% 3868
2018
Q3 		$229K Sell
4,100
-2,600
-39% -$139K ﹤0.01% 8011
2018
Q2 		$358K Buy
6,700
+1,100
+20% +$54.7K ﹤0.01% 6918
2018
Q1 		$243K Sell
5,600
-1,000
-15% -$43.9K ﹤0.01% 7045
2017
Q4 		$299K Sell
6,600
-2,600
-28% -$124K ﹤0.01% 6467
2017
Q3 		$450K Sell
9,200
-3,800
-29% -$168K ﹤0.01% 5479
2017
Q2 		$521K Buy
13,000
+7,900
+155% +$327K ﹤0.01% 5051
2017
Q1 		$220K Sell
5,100
-700
-12% -$29.2K ﹤0.01% 6358
2016
Q4 		$240K Sell
5,800
-1,600
-22% -$61K ﹤0.01% 6017
2016
Q3 		$272K Sell
7,400
-7,700
-51% -$297K ﹤0.01% 5830
2016
Q2 		$605K Sell
15,100
-2,300
-13% -$90.3K ﹤0.01% 4234
2016
Q1 		$679K Buy
17,400
+12,500
+255% +$433K ﹤0.01% 3989
2015
Q4 		$170K Buy
4,900
+400
+9% +$12.9K ﹤0.01% 6005
2015
Q3 		$122K Buy
4,500
+1,500
+50% +$44.3K ﹤0.01% 6757
2015
Q2 		$102K Hold
3,000
– – ﹤0.01% 7052
2015
Q1 		$106K Buy
3,000
+1,300
+76% +$47.5K ﹤0.01% 6797
2014
Q4 		$60K Sell
1,700
-500
-23% -$16.8K ﹤0.01% 7060
2014
Q3 		$74K Sell
2,200
-2,300
-51% -$78.6K ﹤0.01% 6640
2014
Q2 		$155K Sell
4,500
-300
-6% -$10.6K ﹤0.01% 5837
2014
Q1 		$171K Sell
4,800
-2,800
-37% -$109K ﹤0.01% 5681
2013
Q4 		$307K Buy
7,600
+6,200
+443% +$226K ﹤0.01% 4582
2013
Q3 		$45K Sell
1,400
-800
-36% -$24.6K ﹤0.01% 5842
2013
Q2 		$62K Buy
+2,200
New +$61.4K ﹤0.01% 5537

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.