Derek Brummer
CIK 1578586 · President, Mortgage Insurance · last filed 2024-12-06
Derek Brummer is a President, Mortgage Insurance who has filed 44 SEC Form 4 insider transactions across 1 company since 2015. The most recent filing, for RDN, was dated Sep 18, 2025. Across all open-market trades the lifetime net is −$5.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $7.2M 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.
$7.19M
1
44
-$5.20M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| RDN | President, Mortgage Insurance | 181,143 | $39.71 | $7.19M | -$5.20M | 33 | 2024-12-06 |
Recent Filings
44 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-09-18 | RDN | Notice (144) | −72,519 | -$2.64M | EDGAR |
| 2025-09-11 | RDN | Notice (144) | −52,763 | -$1.87M | EDGAR |
| 2025-06-05 | RDN | Notice (144) | −38,448 | -$1.28M | EDGAR |
| 2025-06-04 | RDN | Notice (144) | −48,780 | -$1.63M | EDGAR |
| 2024-12-06 | RDN | Notice (144) | −14,500 | -$499.0K | EDGAR |
| 2024-12-06 | RDN | Sell (S) | −29,205 | -$1.01M | EDGAR |
| 2024-12-05 | RDN | Notice (144) | −14,705 | -$509.6K | EDGAR |
| 2024-09-06 | RDN | Sell (S) | −35,153 | -$1.24M | EDGAR |
| 2024-09-05 | RDN | Notice (144) | −35,153 | -$1.24M | EDGAR |
| 2024-06-18 | RDN | Mixed | +3,225 | -$74.6K | 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.