William Blair & Company
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William Blair & Company’s Cogent Communications CCOI Stock Holding History

William Blair & Company’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
2017
Q3 		– Sell
-100
Closed -$4K – 1384
2017
Q2 		$4K Hold
100
– – ﹤0.01% 1610
2017
Q1 		$4K Buy
+100
New +$4.17K ﹤0.01% 1442

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

William Blair & Company's CCOI Position: Q1 2026 in Review

William Blair & Company reduced its Cogent Communications (CCOI) stake by 6.3% in Q1 2026, selling an estimated $245K and leaving 166,521 shares worth $3.14M. The position accounts for 0.01% of the portfolio, ranked #616.

William Blair & Company first reported a position in CCOI in Q2 2013 and has held it in 52 quarters since. The position peaked at $32.8M in Q4 2021. 233 funds tracked by Wall St. Rank hold CCOI as of Q1 2026.

  • William Blair & Company held 166,521 shares of Cogent Communications worth $3.14M as of Q1 2026.
  • William Blair & Company sold 11,134 Cogent Communications shares in Q1 2026, an estimated $245K.
  • Cogent Communications made up 0.01% of William Blair & Company's portfolio in Q1 2026, its #616 holding.
  • William Blair & Company first reported a position in Cogent Communications in Q2 2013 and has held it in 52 quarters since.
  • William Blair & Company's Cogent Communications position peaked at $32.8M in Q4 2021.
  • 233 funds tracked by Wall St. Rank held Cogent Communications as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.