Buckley Sean Patrick
Officer · MGNI
As of 2026-09-16, Buckley Sean Patrick has 30 Form 4 transactions on record across 1 company — 19 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Pattern in the record: open-market sales filed in August in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.
Reconstructed holdings
- Direct $7.0M
- Indirect $0
| MGNI | direct | 293,060 sh | $7.0M |
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-18 | MGNI | Sale | 2,759 @ $25.00 | $69K | −0.9% of holding | 293,060 | Form 4 |
| 2026-08-17 | MGNI | Sale | 8,271 @ $24.31 | $201K | −2.7% of holding | 295,819 | Form 4 |
| 2026-08-06 | MGNI | Sale | 47,942 @ $25.09 | $1.2M | −12.5% of holding | 335,042 | Form 4 |
| 2026-08-06 | MGNI | Sale | 19,237 @ $23.00 | $442K | −5.7% of holding | 315,805 | Form 4 |
| 2026-07-07 | MGNI | Sale | 19,233 @ $21.03 | $404K | −5.1% of holding | 354,281 | Form 4 |
| 2026-06-17 | MGNI | Sale | 19,233 @ $19.00 | $365K | −4.9% of holding | 373,514 | Form 4 |
| 2025-11-24 | MGNI | Sale | 2,213 @ $14.50 | $32K | −0.8% of holding | 268,912 | Form 4 |
| 2025-11-18 | MGNI | Sale | 4,426 @ $13.36 | $59K | −1.6% of holding | 271,125 | Form 4 |
| 2025-09-09 | MGNI | Sale | 20,000 @ $24.61 | $492K | −6.5% of holding | 287,193 | Form 4 |
| 2025-09-08 | MGNI | Sale | 20,000 @ $25.56 | $511K | −6.1% of holding | 307,193 | Form 4 |
| 2025-08-19 | MGNI | Sale | 9,315 @ $23.42 | $218K | −2.8% of holding | 327,193 | Form 4 |
| 2025-08-18 | MGNI | Sale | 10,886 @ $23.85 | $260K | −3.1% of holding | 336,508 | Form 4 |
| 2025-05-16 | MGNI | Sale | 9,692 @ $15.73 | $152K | −2.7% of holding | 347,394 | Form 4 |
| 2025-02-19 | MGNI | Sale | 10,527 @ $19.13 | $201K | −2.8% of holding | 370,558 | Form 4 |
| 2025-02-07 | MGNI | Sale | 18,693 @ $20.00 | $374K | −4.4% of holding | 408,529 | Form 4 |
15 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-08-15 | MGNI | Withheld for tax | 11,715 | 304,090 | Form 4 |
| 2026-08-06 | MGNI | Option exercise | 28,703 | 382,984 | Form 4 |
| 2026-08-06 | MGNI | Option exercise | 28,703 | 57,405 | Form 4 |
| 2026-05-15 | MGNI | Withheld for tax | 12,019 | 392,747 | Form 4 |
| 2026-02-15 | MGNI | Withheld for tax | 26,942 | 402,999 | Form 4 |
| 2026-01-09 | MGNI | Withheld for tax | 30,369 | 429,941 | Form 4 |
| 2026-01-09 | MGNI | Option exercise | 64,125 | 460,310 | Form 4 |
| 2026-01-09 | MGNI | Option exercise | 64,125 | 0 | Form 4 |
| 2026-01-01 | MGNI | Award / grant | 42,757 | 42,757 | Form 4 |
| 2026-01-01 | MGNI | Award / grant | 127,273 | 396,185 | Form 4 |
| 2025-11-15 | MGNI | Withheld for tax | 11,642 | 275,551 | Form 4 |
| 2025-05-15 | MGNI | Withheld for tax | 15,049 | 357,086 | Form 4 |
| 2025-02-15 | MGNI | Withheld for tax | 27,444 | 381,085 | Form 4 |
| 2025-01-09 | MGNI | Award / grant | 41,566 | 41,566 | Form 4 |
| 2025-01-09 | MGNI | Award / grant | 123,479 | 427,222 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.