Sean Patrick Buckley
CIK 1865116 · President, Revenue · last filed 2026-05-19
Sean Patrick Buckley is a President, Revenue who has filed 35 SEC Form 4 insider transactions across 1 company since 2021. The most recent filing shows the insider had shares withheld for taxes covering $154.1K of MGNI on May 19, 2026. Across all open-market trades the lifetime net is −$4.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $6.4M 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.
$6.38M
1
35
-$3.99M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MGNI | President, Revenue | 392,747 | $16.25 | $6.38M | -$3.99M | 35 | 2026-05-19 |
Recent Filings
35 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 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 |
| 2025-11-18 | MGNI | Mixed | −16,068 | -$223.9K | EDGAR |
| 2025-09-10 | MGNI | Sell (S) | −40,000 | -$1.00M | EDGAR |
| 2025-08-20 | MGNI | Sell (S) | −20,201 | -$477.8K | EDGAR |
| 2025-05-16 | MGNI | Mixed | −24,741 | -$391.4K | EDGAR |
| 2025-02-21 | MGNI | Sell (S) | −10,527 | -$201.4K | EDGAR |