Elizabeth A Porter
CIK 1820381 · Sector President · last filed 2026-08-06
"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.
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Disclosed Exposure
$6.25M
Companies
1
Total Filings
41
Lifetime Open-Market Net
-$1.44M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| LDOS | Sector President | 44,384 | $140.89 | $6.25M | -$1.44M | 38 | 2026-08-06 |
Recent Filings · Page 2 of 5
41 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-12-19 | LDOS | Notice (144) | −3,000 | -$544.1K | EDGAR |
| 2025-03-11 | LDOS | Mixed | +3,152 | -$84.4K | EDGAR |
| 2025-03-07 | LDOS | Tax (F) | −410 | -$54.2K | EDGAR |
| 2025-03-05 | LDOS | Tax (F) | −1,016 | -$131.8K | EDGAR |
| 2025-02-19 | LDOS | Mixed | +801 | -$67.0K | EDGAR |
| 2025-02-10 | LDOS | Mixed | +7,434 | -$308.6K | EDGAR |
| 2024-08-09 | LDOS | Tax (F) | −269 | -$38.5K | EDGAR |
| 2024-03-12 | LDOS | Grant (A) | — | $0 | EDGAR |
| 2024-03-08 | LDOS | Tax (F) | −68 | -$8.8K | EDGAR |
| 2024-03-07 | LDOS | Tax (F) | −410 | -$53.1K | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.
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.