A Mark Zeffiro
CIK 1446066 · President, CEO · 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
$6.42M
Companies
3
Total Filings
63
Lifetime Open-Market Net
-$4.90M
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 | Director | 23,945 | $77.45 | $1.85M | -$1.25M | 21 | 2026-06-02 |
| Horizon Global Corp (HZN) Delisted | President, CEO | 342,696 | $1.76 | $603.1K | -$295.7K | 11 | 2018-03-05 |
| TRS | Executive Vice President & CFO | 113,562 | $40.22 | $4.57M | -$3.35M | 29 | 2014-10-31 |
Recent Filings · Page 2 of 7
63 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 |
|---|---|---|---|---|---|
| 2024-05-22 | ATKR | Notice (144) | −2,000 | -$308.2K | EDGAR |
| 2024-05-22 | ATKR | Sell (S) | −2,000 | -$308.2K | EDGAR |
| 2024-01-31 | ATKR | Grant (A) | +956 | $0 | EDGAR |
| 2023-05-24 | ATKR | Notice (144) | −750 | -$89.1K | EDGAR |
| 2023-05-24 | ATKR | Sell (S) | −750 | -$89.1K | EDGAR |
| 2023-01-31 | ATKR | Grant (A) | +1,099 | $0 | EDGAR |
| 2022-01-27 | ATKR | Grant (A) | +1,491 | $0 | EDGAR |
| 2021-05-12 | ATKR | Sell (S) | −10,000 | -$856.9K | EDGAR |
| 2021-02-01 | ATKR | Grant (A) | +2,597 | $0 | EDGAR |
| 2020-01-31 | ATKR | Grant (A) | +2,682 | $0 | 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.