John William III Swann
CIK 1653288 · PRES., DETECTION & MEASUREMENT · last filed 2026-03-04
John William III Swann is a PRES., DETECTION & MEASUREMENT who has filed 48 SEC Form 4 insider transactions across 1 company since 2015. The most recent filing shows the insider had shares withheld for taxes covering $44.1K of SPXC on Mar 4, 2026. Across all open-market trades the lifetime net is −$18.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $13.5M 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.
$13.47M
1
48
-$18.00M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SPXC | PRES., DETECTION & MEASUREMENT | 63,452 | $212.35 | $13.47M | -$18.00M | 46 | 2026-03-04 |
Recent Filings
48 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-04 | SPXC | Tax (F) | −196 | -$44.1K | EDGAR |
| 2026-03-03 | SPXC | Tax (F) | −620 | -$140.7K | EDGAR |
| 2026-02-26 | SPXC | Mixed | −636 | -$762.8K | EDGAR |
| 2025-11-21 | SPXC | Mixed | −23,170 | -$7.03M | EDGAR |
| 2025-11-19 | SPXC | Notice (144) | −38,755 | -$7.99M | EDGAR |
| 2025-03-05 | SPXC | Grant (A) | +4,254 | $0 | EDGAR |
| 2025-03-04 | SPXC | Tax (F) | −1,081 | -$157.0K | EDGAR |
| 2025-02-26 | SPXC | Mixed | −846 | -$597.3K | EDGAR |
| 2024-11-27 | SPXC | Gift (G) | −1,383 | $0 | EDGAR |
| 2024-03-22 | SPXC | Mixed | −6,408 | -$2.90M | 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.