Milton C Blackmore
CIK 1493440 · last filed 2026-03-06
Milton C Blackmore is a corporate insider who has filed 38 SEC Form 4 insider transactions across 1 company since 2010. The most recent filing shows the insider sold $45.5K of IOSP on Mar 6, 2026. Across all open-market trades the lifetime net is −$760.5K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $998.4K 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.
$998.4K
1
38
-$760.5K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| IOSP | Director | 11,530 | $86.59 | $998.4K | -$760.5K | 38 | 2026-03-06 |
Recent Filings
38 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-06 | IOSP | Sell (S) | −594 | -$45.5K | EDGAR |
| 2026-03-03 | IOSP | Sell (S) | −594 | -$45.5K | EDGAR |
| 2026-02-24 | IOSP | Mixed | +1,539 | -$38.8K | EDGAR |
| 2025-02-27 | IOSP | Grant (A) | +1,209 | $0 | EDGAR |
| 2025-02-24 | IOSP | Sell (S) | −652 | -$67.4K | EDGAR |
| 2024-11-14 | IOSP | Mixed | — | -$81.7K | EDGAR |
| 2024-02-28 | IOSP | Grant (A) | +782 | $0 | EDGAR |
| 2024-02-26 | IOSP | Sell (S) | −601 | -$73.4K | EDGAR |
| 2023-03-02 | IOSP | Grant (A) | +594 | $0 | EDGAR |
| 2022-03-01 | IOSP | Mixed | — | -$71.6K | EDGAR |