GIM
CCOI icon

Granahan Investment Management’s Cogent Communications CCOI Stock Holding History

Granahan Investment Management’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
Q2 		$4.2M Sell
302,653
-14,794
-5% -$273K 0.15% 124
2026
Q1 		$5.98M Buy
317,447
+100,422
+46% +$2.21M 0.29% 91
2025
Q4 		$4.68M Buy
217,025
+108,036
+99% +$3.19M 0.2% 113
2025
Q3 		$4.18M Sell
108,989
-115,502
-51% -$4.82M 0.17% 110
2025
Q2 		$10.8M Buy
224,491
+38,909
+21% +$1.98M 0.44% 58
2025
Q1 		$11.4M Buy
185,582
+11,101
+6% +$819K 0.57% 55
2024
Q4 		$13.4M Sell
174,481
-7,986
-4% -$637K 0.56% 51
2024
Q3 		$13.9M Buy
182,467
+11,214
+7% +$772K 0.54% 52
2024
Q2 		$9.67M Buy
171,253
+1,591
+0.9% +$95K 0.39% 83
2024
Q1 		$11.1M Buy
169,662
+30,741
+22% +$2.24M 0.39% 76
2023
Q4 		$10.6M Buy
138,921
+26,950
+24% +$1.8M 0.35% 85
2023
Q3 		$6.93M Buy
111,971
+71,288
+175% +$4.66M 0.25% 107
2023
Q2 		$2.74M Buy
+40,683
New +$2.66M 0.08% 148
2018
Q4 		– Sell
-41,612
Closed -$2.32M – 195
2018
Q3 		$2.32M Sell
41,612
-19,498
-32% -$1.04M 0.13% 146
2018
Q2 		$3.26M Buy
61,110
+30,732
+101% +$1.53M 0.2% 128
2018
Q1 		$1.32M Sell
30,378
-11,623
-28% -$510K 0.1% 164
2017
Q4 		$1.9M Sell
42,001
-14,621
-26% -$696K 0.15% 147
2017
Q3 		$2.77M Sell
56,622
-13,417
-19% -$594K 0.23% 121
2017
Q2 		$2.81M Buy
70,039
+10,303
+17% +$427K 0.26% 115
2017
Q1 		$2.57M Sell
59,736
-408,353
-87% -$17M 0.26% 115
2016
Q4 		$19.4M Buy
468,089
+3,800
+0.8% +$145K 0.67% 59
2016
Q3 		$17.1M Buy
464,289
+94,600
+26% +$3.65M 0.56% 71
2016
Q2 		$14.8M Buy
369,689
+67,800
+22% +$2.66M 0.54% 71
2016
Q1 		$11.8M Sell
301,889
-93,100
-24% -$3.23M 0.43% 88
2015
Q4 		$13.7M Sell
394,989
-122,600
-24% -$3.96M 0.47% 77
2015
Q3 		$14.1M Buy
+517,589
New +$15.3M 0.44% 82

Other funds holding CCOI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
TCAM
Turtle Creek Asset Management Toronto, Ontario, Canada $2.56B AUM 1.05% 1-Year Est. Return
PWAM
Park West Asset Management San Francisco, California $1.47B AUM 86.42% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
EIG
EdgePoint Investment Group Toronto, Ontario, Canada $13.2B AUM 32.43% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
NM
Newtyn Management New York $801M AUM 23.14% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return

Granahan Investment Management's CCOI Position: Q2 2026 in Review

Granahan Investment Management reduced its Cogent Communications (CCOI) stake by 4.7% in Q2 2026, selling an estimated $273K and leaving 302,653 shares worth $4.2M. The position accounts for 0.15% of the portfolio, ranked #124.

Granahan Investment Management first reported a position in CCOI in Q3 2015 and has held it in 26 quarters since. The position peaked at $19.4M in Q4 2016. 225 funds tracked by Wall St. Rank hold CCOI as of Q2 2026.

  • Granahan Investment Management held 302,653 shares of Cogent Communications worth $4.2M as of Q2 2026.
  • Granahan Investment Management sold 14,794 Cogent Communications shares in Q2 2026, an estimated $273K.
  • Cogent Communications made up 0.15% of Granahan Investment Management's portfolio in Q2 2026, its #124 holding.
  • Granahan Investment Management first reported a position in Cogent Communications in Q3 2015 and has held it in 26 quarters since.
  • Granahan Investment Management's Cogent Communications position peaked at $19.4M in Q4 2016.
  • 225 funds tracked by Wall St. Rank held Cogent Communications as of Q2 2026.

Based on Granahan Investment Management's 13F filing for Q2 2026, filed 14 Aug 2026.