JOHN C PLANT
CIK 1136562 · Executive Chairman & CEO · last filed 2026-05-12
"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
$807.78M
Companies
9
Total Filings
104
Lifetime Open-Market Net
-$293.87M
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 |
|---|---|---|---|---|---|---|---|
| MAS | Director | 50,574 | $74.03 | $3.74M | -$255.8K | 16 | 2026-05-12 |
| JBL | Director | 6,500 | $384.82 | $2.50M | -$8.63M | 11 | 2026-04-29 |
| HWM | Executive Chairman & CEO | 3,022,553 | $264.67 | $799.98M | $0 | 1 | 2026-02-18 |
| Howmet Aerospace Inc. (HWMp) Delisted | Executive Chairman & CEO | 2,685,578 | $100.35 | $269.50M | -$125.57M | 18 | 2025-07-02 |
| Howmet Aerospace Inc. (ARNCp) Delisted | Chairman and CEO | 834,144 | — | — | $5.75M | 13 | 2020-02-07 |
| GTES | Director | 57,493 | $27.14 | $1.56M | $0 | 2 | 2019-02-26 |
| Howmet Aerospace Inc. (ARNCpB) Delisted | Director | 17,521 | — | — | $0 | 3 | 2017-06-01 |
| Howmet Aerospace Inc. (AApB) Delisted | Director | 30,000 | — | — | $230.2K | 4 | 2016-10-05 |
| ZF TRW AUTOMOTIVE HOLDINGS CORP (TRW) Delisted | Chairman, President & CEO | 0 | — | — | -$165.39M | 36 | 2015-05-15 |
Recent Filings · Page 6 of 11
104 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2017-10-24 | Howmet Aerospace Inc. (ARNCp) Delisted | Grant (A) | +5,338 | $0 | EDGAR |
| 2017-10-23 | JBL | Grant (A) | +7,500 | $0 | EDGAR |
| 2017-06-01 | Howmet Aerospace Inc. (ARNCpB) Delisted | Grant (A) | +4,409 | $0 | EDGAR |
| 2017-05-16 | MAS | Grant (A) | +3,570 | $0 | EDGAR |
| 2017-03-17 | Howmet Aerospace Inc. (ARNCpB) Delisted | Other (J) | — | $0 | EDGAR |
| 2016-12-02 | Howmet Aerospace Inc. (ARNCpB) Delisted | Grant (A) | +3,112 | $0 | EDGAR |
| 2016-10-21 | JBL | Grant (A) | +9,600 | $0 | EDGAR |
| 2016-10-05 | Howmet Aerospace Inc. (AApB) Delisted | Grant (A) | — | $0 | EDGAR |
| 2016-07-29 | MAS | Sell (S) | −7,000 | -$255.8K | EDGAR |
| 2016-07-06 | Howmet Aerospace Inc. (AApB) Delisted | Grant (A) | — | $0 | EDGAR |
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.