Douglas S Knopper
CIK 1350876 · last filed 2026-06-10
Douglas S Knopper is a corporate insider who has filed 17 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing, for MGNI, was dated Jun 10, 2026. Across all open-market trades the lifetime net is −$904.6K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $2.7M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$2.70M
4
17
-$904.6K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MGNI | Director | 163,147 | $16.25 | $2.65M | -$904.6K | 9 | 2026-06-10 |
| RUBI | Director | 102,884 | $0.47 | $48.1K | $0 | 1 | 2020-04-03 |
| Telaria, Inc. (TLRA) Delisted | Director | 84,757 | — | — | $0 | 3 | 2019-10-17 |
| MEDIALINK WORLDWIDE INC (MDLK) Delisted | Director | — | — | — | $0 | 3 | 2009-01-06 |
Recent Filings
17 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-10 | MGNI | Mixed | +3,032 | -$169.3K | EDGAR |
| 2025-06-06 | MGNI | Grant (A) | +10,766 | $0 | EDGAR |
| 2024-06-13 | MGNI | Grant (A) | +14,061 | $0 | EDGAR |
| 2023-06-16 | MGNI | Grant (A) | +13,743 | $0 | EDGAR |
| 2022-06-09 | MGNI | Grant (A) | +16,489 | $0 | EDGAR |
| 2021-07-13 | MGNI | Sell (S) | −10,200 | -$334.4K | EDGAR |
| 2021-06-30 | MGNI | Grant (A) | +3,936 | $0 | EDGAR |
| 2021-04-07 | MGNI | Sell (S) | −10,000 | -$400.8K | EDGAR |
| 2020-07-16 | MGNI | Grant (A) | +18,436 | $0 | EDGAR |
| 2020-04-03 | RUBI | Grant (A) | +102,884 | $0 | EDGAR |