Summary
Updated Aug 31, 2026
Lawrence Michael Ziemba is Director of PLAINS GP HOLDINGS LP (PAGP). 3 SEC Form 4 filings on record going back to 2025, most recently on 17 August 2026. Most recent open-market trade: sold $51K of PAA on 30 June 2026. Lifetime open-market sales: $51K.
Recent Transactions
4Every recent SEC Form 4 transaction Lawrence Michael Ziemba has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Lawrence Michael Ziemba go back to 2025: 3 primary Form 4 filings, an average of 1.5 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Sector
No other insider has filed at Lawrence Michael Ziemba's companies, so these are insiders reporting open-market trades at other companies in the same sector.
- Mark Richard - $4.44M of HAL open-market activity in the last 12 months
- Timothy D. Yang - $4.39M of MGY open-market activity in the last 12 months
- Brian Cree - $4.30M of VTS open-market activity in the last 12 months
- Blake Denton - $4.25M of NE open-market activity in the last 12 months
- Hans Helmerich - $4.15M of HP open-market activity in the last 12 months
- John Schmitz - $4.14M of WTTR open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Lawrence Michael Ziemba?
Lawrence Michael Ziemba is a corporate insider, tracked as Director of PLAINS GP HOLDINGS LP (PAGP). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Lawrence Michael Ziemba submitted recently?
2 primary Form 4 filings in the last 90 days, covering 2 companies.
Has Lawrence Michael Ziemba been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($51K) across all tracked filings.
Where can I see all of Lawrence Michael Ziemba's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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