Ken Griffin Cogent Communications Holdings, Inc. Transaction History

Citadel Advisors LLC

$618 Billion
Q3 2025

A detailed history of Ken Griffin (Citadel Advisors LLC) transactions in Cogent Communications Holdings, Inc. stock. As of the latest transaction made, Citadel Advisors LLC holds 81,905 shares of CCOI stock, worth $1.44 Million. This represents 0.0% of its overall portfolio holdings.

Number of Shares

81,905

Previous 250,845 67.35%

Holding current value

$1.44 Million

Previous $12.1 Million 74.03%

% of portfolio

0.0%

Previous 0.0%

27 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 14, 2025	SELL	$30.62 - $52.91 $5.17 Million - $8.94 Million	-168,940 Reduced 67.35%	81,905 $3.14 Million
Q2 2025 Aug 14, 2025	BUY	$45.71 - $61.66 $9.12 Million - $12.3 Million	199,609 Added 389.59%	250,845 $12.1 Million
Q1 2025 May 15, 2025	SELL	$61.31 - $83.44 $16.4 Million - $22.3 Million	-267,197 Reduced 83.91%	51,236 $3.14 Million
Q4 2024 Feb 14, 2025	SELL	$74.18 - $85.35 $558,130 - $642,173	-7,524 Reduced 2.31%	318,433 $24.5 Million
Q3 2024 Nov 14, 2024	BUY	$54.78 - $76.51 $11.8 Million - $16.5 Million	215,963 Added 196.34%	325,957 $24.7 Million

Q2 2024 Aug 14, 2024	SELL	$51.71 - $65.99 $2.3 Million - $2.94 Million	-44,493 Reduced 28.8%	109,994 $6.21 Million
Q1 2024 May 15, 2024	SELL	$61.94 - $80.91 $24.3 Million - $31.8 Million	-392,907 Reduced 71.78%	154,487 $10.1 Million
Q4 2023 Feb 14, 2024	BUY	$59.37 - $76.18 $32 Million - $41.1 Million	538,883 Added 6331.61%	547,394 $41.6 Million
Q3 2023 Nov 14, 2023	SELL	$58.16 - $71.37 $13.8 Million - $17 Million	-237,558 Reduced 96.54%	8,511 $526,000
Q2 2023 Aug 14, 2023	SELL	$61.15 - $73.58 $655,589 - $788,851	-10,721 Reduced 4.18%	246,069 $16.6 Million
Q1 2023 May 15, 2023	SELL	$57.74 - $70.4 $18.2 Million - $22.1 Million	-314,512 Reduced 55.05%	256,790 $16.4 Million
Q4 2022 Feb 14, 2023	SELL	$49.47 - $58.66 $5.59 Million - $6.62 Million	-112,925 Reduced 16.5%	571,302 $32.6 Million
Q3 2022 Nov 14, 2022	BUY	$49.63 - $64.18 $5.13 Million - $6.64 Million	103,439 Added 17.81%	684,227 $35.7 Million
Q2 2022 Aug 15, 2022	BUY	$55.66 - $71.94 $30.1 Million - $38.9 Million	540,286 Added 1333.97%	580,788 $35.3 Million
Q4 2021 Feb 14, 2022	SELL	$71.72 - $80.27 $127,446 - $142,639	-1,777 Reduced 4.2%	40,502 $2.96 Million
Q3 2021 Nov 15, 2021	BUY	$70.38 - $77.96 $2.01 Million - $2.23 Million	28,543 Added 207.8%	42,279 $3 Million
Q2 2021 Aug 16, 2021	BUY	$67.48 - $79.21 $723,183 - $848,893	10,717 Added 354.99%	13,736 $1.06 Million
Q1 2021 May 17, 2021	SELL	$56.95 - $68.76 $13.5 Million - $16.3 Million	-237,001 Reduced 98.74%	3,019 $208,000
Q4 2020 Feb 16, 2021	BUY	$54.09 - $65.05 $3.42 Million - $4.12 Million	63,266 Added 35.79%	240,020 $14.4 Million
Q3 2020 Nov 16, 2020	BUY	$59.07 - $90.11 $8.28 Million - $12.6 Million	140,208 Added 383.65%	176,754 $10.6 Million
Q2 2020 Aug 14, 2020	BUY	$74.57 - $90.75 $1.86 Million - $2.27 Million	24,998 Added 216.47%	36,546 $2.83 Million
Q1 2020 May 15, 2020	SELL	$65.5 - $87.06 $1.53 Million - $2.04 Million	-23,411 Reduced 66.97%	11,548 $947,000
Q4 2019 Feb 14, 2020	SELL	$53.67 - $66.23 $1.71 Million - $2.12 Million	-31,937 Reduced 47.74%	34,959 $2.3 Million
Q3 2019 Nov 14, 2019	BUY	$54.6 - $63.72 $3.1 Million - $3.62 Million	56,831 Added 564.64%	66,896 $3.69 Million
Q2 2019 Aug 14, 2019	SELL	$53.92 - $61.04 $2.99 Million - $3.39 Million	-55,500 Reduced 84.65%	10,065 $598,000
Q1 2019 May 15, 2019	BUY	$44.55 - $54.25 $1.02 Million - $1.24 Million	22,929 Added 53.78%	65,565 $0
Q4 2018 Feb 14, 2019	BUY	$42.4 - $56.03 $1.81 Million - $2.39 Million	42,636 New	42,636 $1.93 Million

Others Institutions Holding CCOI

# of Institutions

318

Shares Held

52M

Call Options Held

578K

Put Options Held

673K

View Full List

About COGENT COMMUNICATIONS HOLDINGS, INC.

Ticker CCOI
Exchange NASDAQ
Sector Communication Services
Industry Telecom Services
Shares Outstandng 48,014,400
Market Cap $843M
Description
Cogent Communications Holdings, Inc., through its subsidiaries, provides high-speed Internet access, private network, and data center colocation space services in North America, Europe, Asia, South America, Australia, and Africa. The company offers on-net Internet access and private network services to law firms, financial services firms, and ad...

More about CCOI

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