Lawrence Michael Ziemba
CIK 1547334 · Executive VP, Refining · last filed 2026-08-17
Lawrence Michael Ziemba is an Executive VP, Refining who has filed 40 SEC Form 4 insider transactions across 4 companies since 2012. The most recent filing, for PAGP, was dated Aug 17, 2026. Across all open-market trades the lifetime net is −$23.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $10.9M across reported positions. 15 SEC filings were submitted jointly with 66 Phillips.
"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.
$10.87M
4
40
-$23.59M
Filer Profile
HOUSTON, TX 77079
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| PAGP | Director | 95,180 | $27.99 | $2.66M | $0 | 11 | 2026-08-17 |
| PBF | Director | 21,016 | $78.30 | $1.65M | $0 | 5 | 2026-04-30 |
| PBF Logistics LP (PBFX) Delisted | Director | 0 | $19.90 | $0 | $0 | 9 | 2022-11-30 |
| PSX | Executive VP, Refining | 25,274 | $259.47 | $6.56M | -$23.59M | 14 | 2017-04-05 |
Recent Filings
40 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-08-17 | PAGP | Mixed | +7,400 | $0 | EDGAR |
| 2026-06-29 | PAA | Notice (144) | −2,346 | -$51.5K | EDGAR |
| 2026-04-30 | PBF | Mixed | +3,300 | -$38.5K | EDGAR |
| 2025-08-18 | PAGP | Mixed | +19,550 | $0 | EDGAR |
| 2025-05-01 | PBF | Mixed | +7,927 | -$38.5K | EDGAR |
| 2024-08-15 | PAGP | Mixed | +23,340 | $0 | EDGAR |
| 2024-05-02 | PBF | Mixed | +2,563 | -$38.5K | EDGAR |
| 2023-08-17 | PAGP | Grant (A) | — | $0 | EDGAR |
| 2023-08-16 | PAGP | Exer (M) | +17,880 | $0 | EDGAR |
| 2023-05-05 | PBF | Mixed | +4,207 | -$38.5K | EDGAR |
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.