Who
Douglas S. Knopper
Director
Company insider
Files Form 4 as: Director, Magnite; Director, Telaria; Director, Medialink Worldwide.
In numbers
- Trades disclosed
- 36
- Buys
- 0
- Sells
- 6
- Bought
- $0
- Sold
- $6.1M
- Companies
- 3
- Companies where not an officer
- 3
- First trade
- 25 Jan 2006
- Last trade
- 17 Sep 2026
- Last filed
- 18 Sep 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 17 Sep 2026filed 18 Sep 2026 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $981K37,337 at $26.28 | filing |
| 17 Sep 2026filed 18 Sep 2026 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $981K37,337 at $26.28 | filing |
| 6 Aug 2026filed 7 Aug 2026 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $848K37,337 at $22.72 | filing |
| 6 Aug 2026filed 7 Aug 2026 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $848K37,337 at $22.72 | filing |
| 16 Jun 2026filed 17 Jun 2026 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $676K37,337 at $18.10 | filing |
| 16 Jun 2026filed 17 Jun 2026 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $676K37,337 at $18.10 | filing |
| 10 Jun 2026filed 10 Jun 2026 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $169K10,766 at $15.73 | filing |
| 10 Jun 2026filed 10 Jun 2026 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $169K10,766 at $15.73 | filing |
| 8 Jun 2026filed 10 Jun 2026 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Code A | —13,798 at $0.00 | filing |
| 8 Jun 2026filed 10 Jun 2026 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Code A | —13,798 at $0.00 | filing |
| 5 Jun 2025filed 6 Jun 2025 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Code A | —10,766 at $0.00 | filing |
| 12 Jun 2024filed 13 Jun 2024 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Code A | —14,061 at $0.00 | filing |
| 14 Jun 2023filed 16 Jun 2023 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Code A | —13,743 at $0.00 | filing |
| 7 Jun 2022filed 9 Jun 2022 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Code A | —16,489 at $0.00 | filing |
| 9 Jul 2021filed 13 Jul 2021 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $294K9,010 at $32.68 | filing |
| 9 Jul 2021filed 13 Jul 2021 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $40K1,190 at $33.61 | filing |
| 28 Jun 2021filed 30 Jun 2021 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Code A | —3,936 at $0.00 | filing |
| 5 Apr 2021filed 7 Apr 2021 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $195K4,923 at $39.55 | filing |
| 5 Apr 2021filed 7 Apr 2021 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $176K4,377 at $40.32 | filing |
| 5 Apr 2021filed 7 Apr 2021 | MGNI MagniteIT Services & Consulting | SEC FORM 4 Sold | $8,306200 at $41.53 | filing |
News
No headline names them, or the companies they trade most, lately.