Sean Patrick Buckley
CIK 1865116 · See Remarks · last filed 2026-07-09
Sean Patrick Buckley is a corporate insider who has filed 58 SEC Form 4 insider transactions across 1 company since 2021. The most recent filing shows the insider sold $404.5K of MGNI on Jul 9, 2026. Across all open-market trades the lifetime net is −$4.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $7.0M 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.
$6.98M
1
58
-$4.76M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MGNI | See Remarks | 354,281 | $19.70 | $6.98M | -$4.76M | 37 | 2026-07-09 |
Recent Filings
58 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-07-09 | MGNI | Sell (S) | −19,233 | -$404.5K | EDGAR |
| 2026-07-07 | MGNI | Notice (144) | −19,233 | -$400.8K | EDGAR |
| 2026-06-18 | MGNI | Sell (S) | −19,233 | -$365.4K | EDGAR |
| 2026-06-17 | MGNI | Notice (144) | −19,233 | -$356.8K | EDGAR |
| 2026-05-19 | MGNI | Tax (F) | −12,019 | -$154.1K | EDGAR |
| 2026-02-18 | MGNI | Tax (F) | −26,942 | -$315.2K | EDGAR |
| 2026-01-12 | MGNI | Mixed | +33,756 | -$491.1K | EDGAR |
| 2026-01-05 | MGNI | Grant (A) | +127,273 | $0 | EDGAR |
| 2025-11-26 | MGNI | Sell (S) | −2,213 | -$32.1K | EDGAR |
| 2025-11-24 | MGNI | Notice (144) | −2,213 | -$32.1K | 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.