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Lawrence Michael Ziemba

CIK 1547334 · Executive VP, Refining · last filed 2026-04-30

Lawrence Michael Ziemba is an Executive VP, Refining who has filed 39 SEC Form 4 insider transactions across 4 companies since 2012. The most recent filing, for PAA, was dated Jun 29, 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 $8.8M 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.

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Disclosed Exposure

$8.79M

Companies

4

Total Filings

39

Lifetime Open-Market Net

-$23.59M

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
PBF Director 21,016 $61.00 $1.28M $0 5 2026-04-30
PAGP Director 87,780 $26.27 $2.31M $0 10 2025-08-18
PBF Logistics LP (PBFX) Delisted Director 0 $19.90 $0 $0 9 2022-11-30
PSX Executive VP, Refining 25,274 $205.85 $5.20M -$23.59M 14 2017-04-05

Recent Filings

39 filings
Insider 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
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
2023-01-05 PBF Grant (A) +1,745 $0 EDGAR
Showing 1–10 of 39
Page 1 of 4
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.