Lamps Mark F.
Officer · ATKR
As of 2026-09-16, Lamps Mark F. has 18 Form 4 transactions on record across 1 company — 11 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Pattern in the record: open-market sales filed in August in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.
Reconstructed holdings
- Direct $3.4M
- Indirect $0
| ATKR | direct | 35,850 sh | $3.4M |
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-10 | ATKR | Sale | 300 @ $93.75 | $28K | −0.8% of holding | 35,803 | Form 4 |
| 2026-02-17 | ATKR | Sale | 1,000 @ $65.78 | $66K | −2.7% of holding | 35,982 | Form 4 |
| 2025-11-17 | ATKR | Sale | 1,000 @ $64.75 | $65K | −3.2% of holding | 29,923 | Form 4 |
| 2025-08-15 | ATKR | Sale | 1,000 @ $59.37 | $59K | −3.0% of holding | 31,873 | Form 4 |
| 2025-05-09 | ATKR | Sale | 1,000 @ $69.16 | $69K | −3.0% of holding | 32,828 | Form 4 |
| 2025-02-10 | ATKR | Sale | 500 @ $65.00 | $33K | −1.5% of holding | 33,760 | Form 4 |
12 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-08-28 | ATKR | Award / grant | 47 | 35,850 | Form 4 |
| 2026-05-29 | ATKR | Award / grant | 53 | 36,103 | Form 4 |
| 2026-02-27 | ATKR | Award / grant | 68 | 36,049 | Form 4 |
| 2025-12-17 | ATKR | Award / grant | 68 | 36,982 | Form 4 |
| 2025-11-18 | ATKR | Withheld for tax | 1,053 | 36,913 | Form 4 |
| 2025-11-17 | ATKR | Award / grant | 8,043 | 37,966 | Form 4 |
| 2025-11-13 | ATKR | Withheld for tax | 604 | 30,923 | Form 4 |
| 2025-11-11 | ATKR | Withheld for tax | 397 | 31,527 | Form 4 |
| 2025-08-29 | ATKR | Award / grant | 51 | 31,924 | Form 4 |
| 2025-05-28 | ATKR | Award / grant | 45 | 32,873 | Form 4 |
| 2025-02-28 | ATKR | Award / grant | 47 | 33,828 | Form 4 |
| 2024-12-16 | ATKR | Award / grant | 11 | 34,260 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.