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.
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.
Learn More
Follow Lawrence Michael Ziemba and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial
