Perimeter Solutions, Inc.
A maker of wildfire-fighting chemicals and specialty products, Perimeter Solutions supplies the PHOS-CHEK and FIRE-TROL retardants dropped from air tankers to slow blazes, plus phosphorus-based lubricant additives and machinery for medical device manufacturing. The company took its current form in 2018 when private investor SK Capital bought these businesses from Israel Chemicals, though the PHOS-CHEK brand dates to a 1960s Monsanto invention first approved by the U.S. Forest Service in 1963 — its name combines the phosphate chemistry with its job to "check" the spread of fire.
Sold 5.71M
Granted 5.58M · Sold 650.0K
Granted 1.60M · Sold 229.5K
Granted 555.9K
Granted 5.58M
Granted 65.8K
Granted 200.0K · Sold 200.0K
Granted 250.0K · Sold 250.0K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Windacre Partnership LLC10% owner · 7 transactions | — | 16.15M | — | — | 5.71M |
| Thorndike William N JrDirector · 8 transactions | +136.9% | 8.54M | 5.58M | — | 650.0K |
| Khouri HaithamChief Executive Officer, Director · 4 transactions | +272.1% | 1.87M | 1.60M | — | 229.5K |
| Raj VivekDirector · 1 transaction | +456.7% | 677.6K | 555.9K | — | — |
| Howley W NicholasDirector · 4 transactions | 0% | 606.2K | 5.58M | — | — |
| Cool Tracy BrittDirector · 1 transaction | +35.7% | 250.5K | 65.8K | — | — |
| Emery JeffreyPresident - Global Fire Safety · 7 transactions | — | 53.5K | 200.0K | — | 200.0K |
| Sable KyleChief Financial Officer · 10 transactions | -50.5% | 49.5K | 250.0K | — | 250.0K |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 6 months: -7.04M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.