Ticker · held by 4 filers

CCOI

COGENT COMMUNICATIONS HLDGS

All tracked filers currently holding CCOI, ranked by position size. Each row links through to the filer's full portfolio.

Total value held

$396.9M

Total shares

7,386,856

Filers holding

4 · 6 positions

Caveat

long only · 13F-eligible managers only

Filers holding CCOI

sorted by position size · click any filer to see their full portfolio

# Filer Class Shares Value (USD) % of port

1 BlackRock · Larry Fink COM NEW 6,814,238 $384.6M 0.01%

2 Citadel Advisors · Ken Griffin COM NEW 167,124 $3.6M 0.00%

3 Citadel Advisors · Ken Griffin CALLCOM NEW 154,100 $3.3M 0.00%

4 Citadel Advisors · Ken Griffin PUTCOM NEW 149,400 $3.2M 0.00%

5 Renaissance Technologies · Jim Simons (founder) COM NEW 89,031 $1.9M 0.00%

6 Bridgewater Associates · Ray Dalio (founder) COM NEW 12,963 $279.5K 0.00%

What this is

This page reverses the usual 13F view: instead of "what does Buffett hold," it answers "who holds NVDA?" Across the dozen tracked filers, all current 13F-disclosed holders of CCOI are listed, with the position size and what fraction of each filer's overall portfolio it represents.

Caveats: only the filers tracked here are included (~12 names) — not the whole 13F universe (~6,000 filers). Position values are at the most recent quarter-end, not current market price. Only long positions are visible; shorts and synthetics aren't.

v0.2 · 2026 · data via SEC EDGAR · CUSIP→ticker via OpenFIGI