David Day
CIK 1523288 · CHIEF FINANCIAL OFFICER · last filed 2026-05-19
David Day is a CHIEF FINANCIAL OFFICER who has filed 81 SEC Form 4 insider transactions across 3 companies since 2011. The most recent filing shows the insider had shares withheld for taxes covering $181.7K of MGNI on May 19, 2026. Across all open-market trades the lifetime net is −$16.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $8.2M 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.
$8.17M
3
81
-$16.21M
Holdings By Company
Recent Filings
81 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-19 | MGNI | Tax (F) | −14,170 | -$181.7K | EDGAR |
| 2026-02-18 | MGNI | Tax (F) | −30,617 | -$358.2K | EDGAR |
| 2026-01-12 | MGNI | Mixed | +37,506 | -$568.7K | EDGAR |
| 2026-01-05 | MGNI | Grant (A) | +131,661 | $0 | EDGAR |
| 2025-11-18 | MGNI | Tax (F) | −13,197 | -$186.7K | EDGAR |
| 2025-08-20 | MGNI | Sell (S) | −13,366 | -$318.8K | EDGAR |
| 2025-08-19 | MGNI | Gift (G) | −26,374 | $0 | EDGAR |
| 2025-07-02 | MGNI | Sell (S) | −21,682 | -$477.0K | EDGAR |
| 2025-06-26 | MGNI | Mixed | — | -$1.08M | EDGAR |
| 2025-06-20 | MGNI | Mixed | — | -$535.2K | EDGAR |