David Schaeffer

Companies

• Cogent CommunicationsChief executive officer Jan 26, 2006 to now¹⁰
• Cogent CommunicationsChair Jan 26, 2006 to now¹¹
• Cogent CommunicationsFounder¹²
• Cogent CommunicationsPresident Jan 26, 2006 to May 2, 2006¹¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Recent filings

• May 4, 2026Gift 1,000,000 shares of CIK 1158324¹³
• May 4, 2026Gift 1,000,000 shares of CIK 1158324¹³
• May 4, 2026Granted 1,000,000 shares of CIK 1158324¹³
• Apr 1, 2026Gift 29,333 shares of CIK 1158324¹⁴
• Apr 1, 2026Gift 29,333 shares of CIK 1158324¹⁴
• Apr 1, 2026Returned to company 58,667 shares of CIK 1158324¹⁴
• Dec 31, 2025Gift 229,657 shares of CIK 1158324¹⁵
• Dec 31, 2025Gift 229,657 shares of CIK 1158324¹⁵
• Dec 31, 2025Granted 229,657 shares of CIK 1158324¹⁵
• Aug 8, 2025Sold 818,909 shares at $27.50 of CIK 1158324¹⁶
• Aug 7, 2025Sold 1,840,669 shares at $32.60 of CIK 1158324¹⁷
• Jun 16, 2025Sold 25,000 shares at $47.05 of CIK 1158324¹⁸
• Jun 16, 2025Sold 45,000 shares at $47.14 of CIK 1158324¹⁸
• Jun 13, 2025Sold 10,000 shares at $47.34 of CIK 1158324¹⁹
• Jun 13, 2025Sold 45,000 shares at $47.42 of CIK 1158324¹⁹
• Jun 12, 2025Sold 10,000 shares at $47.83 of CIK 1158324²⁰
• Jun 12, 2025Sold 45,000 shares at $47.87 of CIK 1158324²⁰
• Jun 11, 2025Sold 10,000 shares at $48.35 of CIK 1158324²¹
• Jun 11, 2025Sold 45,000 shares at $48.55 of CIK 1158324²¹
• Jun 10, 2025Sold 15,000 shares at $48.63 of CIK 1158324²²
• Jun 10, 2025Sold 40,000 shares at $48.70 of CIK 1158324²²
• Jun 9, 2025Sold 15,000 shares at $48.99 of CIK 1158324²³
• Jun 9, 2025Sold 40,000 shares at $48.51 of CIK 1158324²³
• Jun 6, 2025Sold 30,000 shares at $47.78 of CIK 1158324²⁴
• Jun 6, 2025Sold 50,000 shares at $47.78 of CIK 1158324²⁴