JOHN C PLANT
CIK 1136562 · Executive Chairman & CEO · last filed 2026-05-12
JOHN C PLANT is an Executive Chairman & CEO who has filed 104 SEC Form 4 insider transactions across 9 companies since 2007. The most recent filing, for MAS, was dated May 12, 2026. Across all open-market trades the lifetime net is −$293.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $807.8M across reported positions.
"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.
$807.78M
9
104
-$293.87M
Holdings By Company
| 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
104 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-12 | MAS | Grant (A) | +2,650 | $0 | EDGAR |
| 2026-04-29 | JBL | Grant (A) | +600 | $0 | EDGAR |
| 2026-02-18 | HWM | Grant (A) | +22,333 | $0 | EDGAR |
| 2025-07-02 | Howmet Aerospace Inc. (HWMp) Delisted | Grant (A) | +255,363 | $0 | EDGAR |
| 2025-05-13 | MAS | Grant (A) | +2,900 | $0 | EDGAR |
| 2025-05-12 | Howmet Aerospace Inc. (HWMp) Delisted | Sell (S) | −800,000 | -$125.57M | EDGAR |
| 2025-02-20 | Howmet Aerospace Inc. (HWMp) Delisted | Grant (A) | +41,268 | $0 | EDGAR |
| 2025-01-27 | JBL | Mixed | −48,700 | -$8.63M | EDGAR |
| 2024-05-14 | MAS | Grant (A) | +2,490 | $0 | EDGAR |
| 2024-02-20 | Howmet Aerospace Inc. (HWMp) Delisted | Grant (A) | +89,142 | $0 | EDGAR |