Schaeffer Dave insider trades
Schaeffer Dave has filed 59 Form 4s with the SEC that we hold, all for Cogent Communications Holdings, INC. (CCOI), as CHAIRMAN, CEO, AND PRESIDENT, Director. Across all of them we count 0 purchases worth $0 and 63 sales worth $191.0M reported on Form 4. None of these purchases or sales is dated in the last 12 months. The largest single trade was a sale of 1,840,669 shares of Cogent Communications Holdings, INC. worth $60.0M, dated 2025-08-07. The first filing on our record is dated 2022-01-05 and the latest 2026-05-04.
Cogent Communications Holdings, INC. (CCOI)
CHAIRMAN, CEO, AND PRESIDENT, Director · 59 filings · 63 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2023-05-10 | S, sale reported on Form 4 | 35,000 | $2.3M | 2023-05-12 |
| 2023-06-06 | S, sale reported on Form 4 | 25,605 | $1.6M | 2023-06-08 |
| 2023-06-07 | S, sale reported on Form 4 | 42,334 | $2.6M | 2023-06-08 |
| 2023-06-08 | S, sale reported on Form 4 | 7,061 | $440.9K | 2023-06-08 |
| 2023-09-08 | S, sale reported on Form 4 | 41,691 | $2.8M | 2023-09-12 |
| 2023-09-11 | S, sale reported on Form 4 | 3,309 | $222.2K | 2023-09-12 |
| 2023-09-12 | S, sale reported on Form 4 | 28,247 | $1.9M | 2023-09-14 |
| 2023-09-13 | S, sale reported on Form 4 | 16,753 | $1.1M | 2023-09-14 |
| 2023-09-15 | S, sale reported on Form 4 | 18,191 | $1.2M | 2023-09-18 |
| 2023-11-14 | S, sale reported on Form 4 | 40,000 | $2.7M | 2023-11-16 |
| 2023-11-30 | S, sale reported on Form 4 | 3,396 | $218.4K | 2023-12-01 |
| 2023-12-01 | S, sale reported on Form 4 | 36,604 | $2.4M | 2023-12-01 |
| 2023-12-13 | S, sale reported on Form 4 | 20,000 | $1.4M | 2023-12-14 |
| 2024-03-06 | S, sale reported on Form 4 | 8,826 | $640.3K | 2024-03-08 |
| 2024-03-11 | S, sale reported on Form 4 | 35,000 | $2.4M | 2024-03-14 |
| 2024-03-12 | S, sale reported on Form 4 | 50,000 | $3.4M | 2024-03-14 |
| 2024-03-13 | S, sale reported on Form 4 | 30,000 | $2.0M | 2024-03-15 |
| 2024-03-15 | S, sale reported on Form 4 | 26,174 | $1.7M | 2024-03-18 |
| 2024-05-13 | S, sale reported on Form 4 | 50,000 | $3.0M | 2024-05-14 |
| 2024-06-12 | S, sale reported on Form 4 | 60,000 | $3.3M | 2024-06-13 |
| 2024-06-14 | S, sale reported on Form 4 | 60,000 | $3.1M | 2024-06-17 |
| 2024-08-27 | S, sale reported on Form 4 | 60,000 | $4.4M | 2024-08-28 |
| 2024-09-10 | S, sale reported on Form 4 | 65,000 | $4.7M | 2024-09-11 |
| 2024-11-25 | S, sale reported on Form 4 | 35,636 | $3.0M | 2024-11-27 |
| 2024-11-26 | S, sale reported on Form 4 | 24,364 | $2.0M | 2024-11-27 |
| 2025-03-04 | S, sale reported on Form 4 | 60,000 | $4.3M | 2025-03-05 |
| 2025-05-12 | S, sale reported on Form 4 | 11,372 | $569.7K | 2025-05-14 |
| 2025-05-13 | S, sale reported on Form 4 | 42,628 | $2.2M | 2025-05-14 |
| 2025-05-14 | S, sale reported on Form 4 | 30,000 | $1.5M | 2025-05-15 |
| 2025-05-15 | S, sale reported on Form 4 | 40,000 | $2.0M | 2025-05-16 |
| 2025-05-16 | S, sale reported on Form 4 | 15,000 | $765.0K | 2025-05-19 |
| 2025-05-20 | S, sale reported on Form 4 | 15,000 | $749.4K | 2025-05-21 |
| 2025-05-21 | S, sale reported on Form 4 | 40,000 | $1.9M | 2025-05-22 |
| 2025-05-22 | S, sale reported on Form 4 | 25,000 | $1.2M | 2025-05-23 |
| 2025-05-23 | S, sale reported on Form 4 | 25,000 | $1.2M | 2025-05-27 |
| 2025-05-27 | S, sale reported on Form 4 | 20,000 | $973.4K | 2025-05-28 |
| 2025-05-28 | S, sale reported on Form 4 | 20,000 | $948.2K | 2025-05-29 |
| 2025-05-29 | S, sale reported on Form 4 | 25,000 | $1.2M | 2025-05-30 |
| 2025-05-30 | S, sale reported on Form 4 | 25,000 | $1.1M | 2025-06-02 |
| 2025-06-02 | S, sale reported on Form 4 | 50,000 | $2.3M | 2025-06-03 |
| 2025-06-02 | S, sale reported on Form 4 | 15,000 | $692.0K | 2025-06-03 |
| 2025-06-03 | S, sale reported on Form 4 | 15,000 | $702.9K | 2025-06-04 |
| 2025-06-03 | S, sale reported on Form 4 | 50,000 | $2.4M | 2025-06-04 |
| 2025-06-04 | S, sale reported on Form 4 | 25,000 | $1.2M | 2025-06-05 |
| 2025-06-04 | S, sale reported on Form 4 | 50,000 | $2.4M | 2025-06-05 |
| 2025-06-05 | S, sale reported on Form 4 | 40,000 | $1.9M | 2025-06-09 |
| 2025-06-05 | S, sale reported on Form 4 | 35,000 | $1.7M | 2025-06-09 |
| 2025-06-06 | S, sale reported on Form 4 | 50,000 | $2.4M | 2025-06-09 |
| 2025-06-06 | S, sale reported on Form 4 | 30,000 | $1.4M | 2025-06-09 |
| 2025-06-09 | S, sale reported on Form 4 | 40,000 | $1.9M | 2025-06-09 |
| 2025-06-09 | S, sale reported on Form 4 | 15,000 | $734.9K | 2025-06-09 |
| 2025-06-10 | S, sale reported on Form 4 | 15,000 | $729.5K | 2025-06-10 |
| 2025-06-10 | S, sale reported on Form 4 | 40,000 | $1.9M | 2025-06-10 |
| 2025-06-11 | S, sale reported on Form 4 | 10,000 | $483.5K | 2025-06-12 |
| 2025-06-11 | S, sale reported on Form 4 | 45,000 | $2.2M | 2025-06-12 |
| 2025-06-12 | S, sale reported on Form 4 | 10,000 | $478.3K | 2025-06-12 |
| 2025-06-12 | S, sale reported on Form 4 | 45,000 | $2.2M | 2025-06-12 |
| 2025-06-13 | S, sale reported on Form 4 | 45,000 | $2.1M | 2025-06-16 |
| 2025-06-13 | S, sale reported on Form 4 | 10,000 | $473.4K | 2025-06-16 |
| 2025-06-16 | S, sale reported on Form 4 | 45,000 | $2.1M | 2025-06-16 |
| 2025-06-16 | S, sale reported on Form 4 | 25,000 | $1.2M | 2025-06-16 |
| 2025-08-07 | S, sale reported on Form 4 | 1,840,669 | $60.0M | 2025-08-08 |
| 2025-08-08 | S, sale reported on Form 4 | 818,909 | $22.5M | 2025-08-11 |
Source
Counted from the Form 4 filings this reporting owner (SEC CIK 1166976) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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