Gregory Serio
CIK 1551214 · last filed 2026-05-19
Gregory Serio is a corporate insider who has filed 27 SEC Form 4 insider transactions across 1 company since 2012. The most recent filing, for RDN, was dated Jun 23, 2026. Across all open-market trades the lifetime net is −$818.7K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $408.2K 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.
$408.2K
1
27
-$818.7K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| RDN | Director | 10,279 | $39.71 | $408.2K | -$818.7K | 20 | 2026-05-19 |
Recent Filings
27 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-23 | RDN | Notice (144) | −7,000 | -$248.5K | EDGAR |
| 2026-06-09 | RDN | Notice (144) | −24,000 | -$817.7K | EDGAR |
| 2026-05-19 | RDN | Mixed | +4,832 | -$185 | EDGAR |
| 2025-05-23 | RDN | Grant (A) | — | $0 | EDGAR |
| 2025-05-19 | RDN | Mixed | +5,098 | -$374 | EDGAR |
| 2025-03-03 | RDN | Sell (S) | −4,100 | -$133.9K | EDGAR |
| 2025-02-28 | RDN | Notice (144) | −4,100 | -$133.9K | EDGAR |
| 2025-02-28 | RDN | Notice (144) | −4,100 | -$133.9K | EDGAR |
| 2024-05-24 | RDN | Mixed | −9,663 | -$299.9K | EDGAR |
| 2024-05-23 | RDN | Notice (144) | −9,663 | -$299.9K | 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.