Mark F. Lamps
CIK 1769052 · Pres. Safety & Infrastructure · last filed 2026-06-02
"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
$3.38M
Companies
1
Total Filings
62
Lifetime Open-Market Net
-$2.46M
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 |
|---|---|---|---|---|---|---|---|
| ATKR | Pres. Safety & Infrastructure | 36,102 | $93.75 | $3.38M | -$2.46M | 51 | 2026-06-02 |
Recent Filings · Page 4 of 7
62 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 |
|---|---|---|---|---|---|
| 2023-11-22 | ATKR | Notice (144) | −5,008 | -$646.4K | EDGAR |
| 2023-11-22 | ATKR | Sell (S) | −5,008 | -$654.4K | EDGAR |
| 2023-11-21 | ATKR | Mixed | +8,199 | -$1.30M | EDGAR |
| 2023-11-20 | ATKR | Notice (144) | −138 | -$18.1K | EDGAR |
| 2023-11-20 | ATKR | Mixed | −413 | -$55.3K | EDGAR |
| 2023-11-14 | ATKR | Mixed | +3,003 | -$48.6K | EDGAR |
| 2023-02-07 | ATKR | Mixed | — | -$314.6K | EDGAR |
| 2022-11-23 | ATKR | Mixed | +1,325 | -$1.13M | EDGAR |
| 2022-11-21 | ATKR | Tax (F) | −952 | -$95.8K | EDGAR |
| 2022-11-18 | ATKR | Mixed | +1,925 | -$30.1K | 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.