David Buonasera
CIK 1966857 · CHIEF TECHNOLOGY OFFICER · last filed 2026-07-09
David Buonasera is a CHIEF TECHNOLOGY OFFICER who has filed 50 SEC Form 4 insider transactions across 1 company since 2023. The most recent filing shows the insider sold $25.7K of MGNI on Jul 9, 2026. Across all open-market trades the lifetime net is −$1.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $5.3M 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.
$5.29M
1
50
-$1.92M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MGNI | CHIEF TECHNOLOGY OFFICER | 268,485 | $19.70 | $5.29M | -$1.92M | 32 | 2026-07-09 |
Recent Filings
50 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-07-09 | MGNI | Sell (S) | −1,224 | -$25.7K | EDGAR |
| 2026-07-07 | MGNI | Notice (144) | −1,224 | -$25.7K | EDGAR |
| 2026-07-02 | MGNI | Sell (S) | −9,376 | -$187.5K | EDGAR |
| 2026-07-01 | MGNI | Notice (144) | −9,376 | -$187.5K | EDGAR |
| 2026-06-17 | MGNI | Notice (144) | −1,409 | -$26.8K | EDGAR |
| 2026-06-17 | MGNI | Sell (S) | −13,699 | -$246.9K | EDGAR |
| 2026-06-16 | MGNI | Notice (144) | −11,233 | -$202.2K | EDGAR |
| 2026-06-15 | MGNI | Notice (144) | −1,057 | -$18.0K | EDGAR |
| 2026-06-03 | MGNI | Sell (S) | −1,409 | -$21.1K | EDGAR |
| 2026-06-01 | MGNI | Notice (144) | −1,409 | -$21.1K | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.