William Porteous
CIK 1856453 · last filed 2026-06-01
William Porteous is a corporate insider who has filed 21 SEC Form 4 insider transactions across 2 companies since 2021. The most recent filing, for SPIR, was dated Jun 1, 2026. Current disclosed insider exposure totals $6.8M 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.
$6.85M
2
21
$0
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SPIR | Director | 375,574 | $18.23 | $6.85M | $0 | 19 | 2026-06-01 |
| Spire Global, Inc. (SPIR.WS) Delisted | Director | 2,123,366 | $0.12 | $255.1K | $0 | 2 | 2022-09-02 |
Recent Filings
21 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-01 | SPIR | Grant (A) | +7,261 | $0 | EDGAR |
| 2026-04-03 | SPIR | Grant (A) | +1,896 | $25.4K | EDGAR |
| 2026-01-05 | SPIR | Grant (A) | +3,249 | $25.4K | EDGAR |
| 2025-10-02 | SPIR | Grant (A) | +2,136 | $24.1K | EDGAR |
| 2025-07-02 | SPIR | Grant (A) | +2,065 | $23.3K | EDGAR |
| 2025-06-09 | SPIR | Grant (A) | +15,909 | $0 | EDGAR |
| 2025-04-03 | SPIR | Grant (A) | +2,880 | $22.9K | EDGAR |
| 2025-01-06 | SPIR | Grant (A) | +1,578 | $22.9K | EDGAR |
| 2024-10-03 | SPIR | Grant (A) | +2,289 | $22.9K | EDGAR |
| 2024-07-03 | SPIR | Grant (A) | +2,216 | $22.9K | EDGAR |