Gregory Serio
CIK 1551214 · last filed 2026-05-19
Gregory Serio is a corporate insider who has filed 20 SEC Form 4 insider transactions across 1 company since 2012. The most recent filing, for RDN, was dated May 19, 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 $356.3K 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.
$356.3K
1
20
-$818.7K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| RDN | Director | 10,279 | $34.66 | $356.3K | -$818.7K | 20 | 2026-05-19 |
Recent Filings
20 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 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 |
| 2024-05-24 | RDN | Mixed | −9,663 | -$299.9K | EDGAR |
| 2024-05-17 | RDN | Mixed | +5,886 | -$407 | EDGAR |
| 2023-08-17 | RDN | Sell (S) | −3,800 | -$101.9K | EDGAR |
| 2023-05-22 | RDN | Sell (S) | −11,000 | -$283.0K | EDGAR |
| 2023-05-17 | RDN | Mixed | +7,077 | -$150 | EDGAR |
| 2022-05-17 | RDN | Mixed | +5,982 | -$85 | EDGAR |