Summary
Updated Aug 31, 2026
WINDACRE PARTNERSHIP LLC is 10% Owner of Perimeter Solutions, Inc. (PRM). 2 SEC Form 4 filings on record, most recently on 13 July 2026. Most recent open-market trade: sold $63.56M of PRM on 13 July 2026. Lifetime open-market sales: $391.22M.
Recent Transactions
14Every recent SEC Form 4 transaction WINDACRE PARTNERSHIP LLC has reported, most recent first.
Trading Pattern
InsiderAlpha's records for WINDACRE PARTNERSHIP LLC go back to 2026: 2 primary Form 4 filings, an average of 2.0 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 Stocks
Insiders who reported open-market trades in the last 12 months at the companies WINDACRE PARTNERSHIP LLC files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Jeffrey Emery - $13.25M of PRM open-market activity in the last 12 months
- Kyle Sable - $11.72M of PRM open-market activity in the last 12 months
- William N. Thorndike Jr. - $7.60M of PRM open-market activity in the last 12 months
- Haitham Khouri - $7.28M of PRM open-market activity in the last 12 months
- Noriko Yokozuka - $3.91M of PRM open-market activity in the last 12 months
- Vivek Raj - $561K of PRM 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
What is WINDACRE PARTNERSHIP LLC?
WINDACRE PARTNERSHIP LLC is an investment firm, tracked as 10% Owner of Perimeter Solutions, Inc. (PRM). InsiderAlpha holds 2 primary Form 4 filings for it, the earliest from 2026, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has WINDACRE PARTNERSHIP LLC submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has WINDACRE PARTNERSHIP LLC been buying or selling stock?
Recorded transactions: 0 open-market purchases and 14 open-market sales ($391.22M) across all tracked filings.
Where can I see all of WINDACRE PARTNERSHIP LLC'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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