William D. Porteous
CIK 1865965 · last filed 2026-04-01
William D. Porteous is a corporate insider who has filed 18 SEC Form 4 insider transactions across 1 company since 2021. The most recent filing, for BKSY.WS, was dated Apr 1, 2026. Across all open-market trades the lifetime net is −$6.1K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $67.0K 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.
$67.0K
1
18
-$6.1K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| BKSY.WS | Director | 797,666 | $0.08 | $67.0K | -$6.1K | 18 | 2026-04-01 |
Recent Filings
18 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-04-01 | BKSY.WS | Grant (A) | +894 | $0 | EDGAR |
| 2026-01-02 | BKSY.WS | Grant (A) | +1,200 | $0 | EDGAR |
| 2025-12-10 | BKSY.WS | Grant (A) | +1,500 | $0 | EDGAR |
| 2025-10-01 | BKSY.WS | Grant (A) | +1,116 | $0 | EDGAR |
| 2025-09-11 | BKSY.WS | Grant (A) | +8,625 | $0 | EDGAR |
| 2025-07-01 | BKSY.WS | Grant (A) | +1,093 | $0 | EDGAR |
| 2025-04-01 | BKSY.WS | Grant (A) | +2,910 | $0 | EDGAR |
| 2024-12-31 | BKSY.WS | Grant (A) | +2,085 | $0 | EDGAR |
| 2024-12-16 | BKSY.WS | Sell (S) | −570 | -$6.1K | EDGAR |
| 2024-10-02 | BKSY.WS | Grant (A) | +4,746 | $0 | EDGAR |