PERIMETER SOLUTIONS INC PRM
COMMON STOCK · Common Stock · CUSIP 71385M107
- SectorMaterials
- IndustryChemicals & Allied Products
- HeadquartersClayton, MO
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($1.2m this quarter). Holder counts are more reliable. Shares outstanding: 163.7m as of 2026-07-24, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $35.54. Options: 6 managers hold calls ($7.5m notional), 2 hold puts ($2.3m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q1 2024 | 1 |
| Q2 2024 | 1 |
| Q3 2024 | 0 |
| Q4 2024 | 203 |
| Q1 2025 | 223 |
| Q2 2025 | 211 |
| Q3 2025 | 237 |
| Q4 2025 | 286 |
| Q1 2026 | 293 |
| Q2 2026 | 307 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 0 | 1 |
| Q4 2024 | 196 | 0 |
| Q1 2025 | 128 | 89 |
| Q2 2025 | 107 | 107 |
| Q3 2025 | 123 | 103 |
| Q4 2025 | 160 | 102 |
| Q1 2026 | 148 | 143 |
| Q2 2026 | 193 | 114 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $18.8m | $573.0k | 0.03 |
| Q4 2025 | $13.9m | $864.4k | 0.06 |
| Q1 2026 | $9.4m | $1.5m | 0.16 |
| Q2 2026 | $7.5m | $2.3m | 0.31 |
Biggest buyers
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +1.9m |
| NEUBERGER BERMAN GROUP LLC | Added | +1.8m |
| FRANKLIN RESOURCES INC | Added | +1.6m |
| PRINCIPAL FINANCIAL GROUP INC | Added | +1.5m |
| Invesco Ltd. | Added | +1.4m |
| BlackRock, Inc. | Added | +1.3m |
| Driehaus Capital Management LLC | New | +1.3m |
| Qube Research & Technologies Ltd | Added | +962.1k |
| WELLINGTON MANAGEMENT GROUP LLP | New | +621.7k |
| CREDIT AGRICOLE S A | Added | +590.8k |
Biggest sellers
| WINDACRE PARTNERSHIP LLC | Reduced | -5.7m |
| Corient Private Wealth LP | Reduced | -717.1k |
| Skye Global Management LP | Sold out | -652.0k |
| DF DENT & CO INC | Reduced | -609.7k |
| Senator Investment Group LP | Reduced | -575.0k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -465.0k |
| DIMENSIONAL FUND ADVISORS LP | Reduced | -447.7k |
| GOLDMAN SACHS GROUP INC | Reduced | -431.3k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Reduced | -388.4k |
| East Coast Asset Management, LLC. | Reduced | -267.3k |
Biggest calls
| JANE STREET GROUP, LLC | Reduced | $2.8m79.1k shares |
| IMC-Chicago, LLC | Added | $1.9m54.5k shares |
| CITADEL ADVISORS LLC | Added | $1.8m50.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $830.6k23.3k shares |
| SIMPLEX TRADING, LLC | Reduced | $89.1k2.5k shares |
| GROUP ONE TRADING LLC | Reduced | $7.1k200 shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $2.3m64.5k shares |
| SIMPLEX TRADING, LLC | Unchanged | $10.7k300 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| WINDACRE PARTNERSHIP LLC 13G · institution filed 2026-08-14 | 9.9% |
| PRINCIPAL GLOBAL INVESTORS 13G · institution filed 2026-08-05 | 8.2% |
| FMR LLC 13G · institution new · filed 2025-11-05 | 6.7% |
Thorndike William N Jr
13D · may seek influence
new · filed 2026-03-10
Stated purposeThe Reporting Person acquired the securities of the Issuer for investment purposes. The information contained in Item 3 and in Item 6 of this Schedule 13D is incorporated herein by reference. The Reporting Person or his affiliates may purchase additional securities or dispose of securities of the Issuer in varying amounts and at varying times depending upon the Reporting Person's continuing assessments of pertinent factors, including the availability of shares of Common Stock or other securities for purchase at particular price levels, the business prospects of the Issuer, other business investment opportunities, economic conditions, stock market conditions, money market conditions, the attitudes and actions of the board of directors of the Issuer (the "Board") and management of the Issue… Full filing |
5.7% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-26)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 2 | $3.8m | — |
| Q1 2025 | 0 | — | 1 | $2.3m | — |
| Q2 2025 | 0 | — | 1 | $4.8m | — |
| Q3 2025 | 0 | — | 3 | $8.1m | — |
| Q4 2025 | 0 | — | 2 | $6.8m | — |
| Q1 2026 | 0 | — | 1 | $15.4m | — |
| Q2 2026 | 0 | — | 3 | $21.8m | — |
| Q3 2026 | 0 | — | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-06-30 | WINDACRE PARTNERSHIP LLC 10% owner | Sold | $63.6m1.9m shares |
| 2026-06-30 | WINDACRE PARTNERSHIP LLC +4 10% owner | Sold | $63.6m1.9m shares |
| 2026-06-29 | WINDACRE PARTNERSHIP LLC 10% owner | Sold | $14.4m437.5k shares |
| 2026-06-29 | WINDACRE PARTNERSHIP LLC +4 10% owner | Sold | $14.4m437.5k shares |
| 2026-06-26 | WINDACRE PARTNERSHIP LLC 10% owner | Sold | $117.6m3.4m shares |
| 2026-06-26 | WINDACRE PARTNERSHIP LLC +4 10% owner | Sold | $117.6m3.4m shares |
| 2026-05-22 | Khouri Haitham Chief Executive Officer, director | Sold | $3.7m117.5k shares |
| 2026-05-21 | Khouri Haitham Chief Executive Officer, director | Sold | $2.9m91.7k shares |
| 2026-05-20 | Khouri Haitham Chief Executive Officer, director | Sold | $692.0k20.3k shares |
| 2026-05-13 | Emery Jeffrey President - Global Fire Safety | Sold | $1.8m53.5k shares |
| 2026-05-13 | Sable Kyle Chief Financial Officer | Sold | $1.6m49.5k shares |
| 2026-05-12 | Sable Kyle Chief Financial Officer | Sold | $952.5k30.0k shares |
| 2026-05-11 | Emery Jeffrey President - Global Fire Safety | Sold | $3.3m100.0k shares |
| 2026-05-11 | Sable Kyle Chief Financial Officer | Sold | $672.9k20.5k shares |
| 2026-05-08 | Sable Kyle Chief Financial Officer | Sold | $4.7m150.0k shares |
| 2026-05-08 | Emery Jeffrey President - Global Fire Safety | Sold | $1.5m46.5k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| WINDACRE PARTNERSHIP LLC 5.69% of their portfolio | 16.1m $575.7m | Reduced -5.7m |
| PRINCIPAL FINANCIAL GROUP INC 0.25% of their portfolio | 14.0m $499.4m | Added +1.5m |
| BlackRock, Inc. 0.01% of their portfolio | 12.2m $433.9m | Added +1.3m |
| FMR LLC 0.01% of their portfolio | 9.6m $342.3m | Added +563.4k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 6.6m $234.8m | Added +411.7k |
| DIMENSIONAL FUND ADVISORS LP 0.03% of their portfolio | 4.3m $153.8m | Reduced -447.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 4.2m $150.8m | Added +433.9k |
| Jupiter Topco LLC 0.06% of their portfolio | 4.1m $147.1m | First filing |
| STATE STREET CORP 0.00% of their portfolio | 3.6m $128.7m | Added +367.3k |
| DF DENT & CO INC 2.25% of their portfolio | 3.3m $118.5m | Reduced -609.7k |
| JPMORGAN CHASE & CO 0.01% of their portfolio | 3.1m $102.9m | Added +331.9k |
| BALANCE CAPITAL PARTNERS L.P. 70.00% of their portfolio | 2.7m $97.5m | Unchanged |
| Invesco Ltd. 0.01% of their portfolio | 2.4m $87.2m | Added +1.4m |
| BROWN BROTHERS HARRIMAN & CO 0.38% of their portfolio | 2.4m $85.7m | Reduced -204.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 2.1m $73.2m | Added +1.9m |
| FRANKLIN RESOURCES INC 0.01% of their portfolio | 1.8m $65.2m | Added +1.6m |
| NEUBERGER BERMAN GROUP LLC 0.04% of their portfolio | 1.8m $64.7m | Added +1.8m |
| Senator Investment Group LP 2.34% of their portfolio | 1.8m $64.0m | Reduced -575.0k |
| MORGAN STANLEY 0.00% of their portfolio | 1.7m $62.1m | Reduced -134.3k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 1.7m $60.8m | Added +258.5k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 1.6m $56.8m | Reduced -144.9k |
| EQUITABLE TRUST CO 2.36% of their portfolio | 1.6m $56.5m | Reduced -69.5k |
| Qube Research & Technologies Ltd 0.06% of their portfolio | 1.5m $54.9m | Added +962.1k |
| PRIMECAP MANAGEMENT CO/CA/ 0.03% of their portfolio | 1.5m $53.4m | Reduced -137.9k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 1.5m $53.0m | Added +79.7k |
| Driehaus Capital Management LLC 0.27% of their portfolio | 1.3m $47.3m | New |
| Focus Partners Wealth 0.05% of their portfolio | 1.3m $47.1m | Added +249.4k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 1.3m $46.9m | Added +167.2k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.02% of their portfolio | 1.2m $44.1m | Reduced -388.4k |
| Corient Private Wealth LP 0.06% of their portfolio | 1.2m $42.2m | Reduced -717.1k |
| VANGUARD FIDUCIARY TRUST CO 0.01% of their portfolio | 1.1m $39.2m | Added +188.2k |
| East Coast Asset Management, LLC. 11.48% of their portfolio | 1.1m $38.9m | Reduced -267.3k |
| T. Rowe Price Investment Management, Inc. 0.02% of their portfolio | 1.0m $37.1m | Added +25.3k |
| RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio | 921.5k $32.9m | Added +81.8k |
| BESSEMER GROUP INC 0.04% of their portfolio | 888.7k $31.7m | Reduced -176.3k |
| CREDIT AGRICOLE S A 0.07% of their portfolio | 720.4k $25.7m | Added +590.8k |
| Pennant Investors, LP 7.33% of their portfolio | 689.0k $24.6m | Reduced -249.2k |
| ENVESTNET ASSET MANAGEMENT INC 0.01% of their portfolio | 659.0k $23.5m | Added +108.7k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 621.7k $22.2m | New |
| Catawba River Capital 9.48% of their portfolio | 594.3k $21.2m | Reduced -5.1k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 572.9k $20.4m | Added +117.5k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 549.4k $19.6m | Reduced -431.3k |
| Conestoga Capital Advisors, LLC 0.42% of their portfolio | 536.0k $19.1m | New |
| Bank of New York Mellon Corp 0.00% of their portfolio | 511.5k $18.2m | Added +76.8k |
| FRED ALGER MANAGEMENT, LLC 0.06% of their portfolio | 502.8k $17.9m | New |
| AQR CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 490.4k $17.5m | Reduced -83.8k |
| Nuveen, LLC 0.00% of their portfolio | 477.8k $17.0m | Added +193.4k |
| NORGES BANK 0.00% of their portfolio | 472.1k $16.8m | Not comparable |
| NORDEA INVESTMENT MANAGEMENT AB 0.01% of their portfolio | 463.5k $15.7m | Reduced -554 |
| WEITZ INVESTMENT MANAGEMENT, INC. 1.11% of their portfolio | 450.8k $16.1m | Reduced -58.6k |
| LYNWOOD PRICE CAPITAL MANAGEMENT LP 7.37% of their portfolio | 428.1k $15.3m | Added +78.1k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.09% of their portfolio | 404.3k $14.4m | New |
| IEQ CAPITAL, LLC 0.06% of their portfolio | 371.6k $13.2m | Reduced -40.6k |
| Stanley Capital Management, LLC 1.65% of their portfolio | 349.0k $12.4m | Unchanged |
| FEDERATED HERMES, INC. 0.02% of their portfolio | 330.0k $11.8m | Reduced -26.8k |
| Swiss National Bank 0.01% of their portfolio | 294.1k $10.5m | Added +16.0k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 287.7k $10.3m | Reduced -41.9k |
| Davidson Kahn Capital Management, LLC 4.39% of their portfolio | 286.6k $10.2m | Added +15.9k |
| FIRST TRUST ADVISORS LP 0.01% of their portfolio | 280.4k $10.0m | Reduced -96.0k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 263.6k $9.4m | Added +16.1k |
| UBS Group AG 0.00% of their portfolio | 252.1k $9.0m | Reduced -17.7k |
| AKRE CAPITAL MANAGEMENT LLC 0.17% of their portfolio | 250.0k $8.9m | Unchanged |
| TenCore Partners, LP 6.52% of their portfolio | 234.9k $8.4m | Reduced -39.1k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 231.0k $8.2m | Added +185.2k |
| PRUDENTIAL FINANCIAL INC 0.01% of their portfolio | 230.9k $8.2m | Added +133.0k |
| Hillsdale Investment Management Inc. 0.18% of their portfolio | 223.0k $8.0m | New |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 222.0k $7.9m | Added +28.4k |
| BARCLAYS PLC 0.00% of their portfolio | 220.4k $7.9m | Reduced -18.8k |
| TD Waterhouse Canada Inc. 0.02% of their portfolio | 212.3k $7.4m | Added +151.8k |
| CAPTRUST FINANCIAL ADVISORS 0.01% of their portfolio | 210.8k $7.5m | Added +27.1k |
| ALGERT GLOBAL LLC 0.09% of their portfolio | 201.6k $7.2m | Reduced -95.0k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 190.2k $4.6m | Added +47.4k |
| Walleye Capital LLC 0.03% of their portfolio | 181.2k $6.5m | Added +146.7k |
| KING LUTHER CAPITAL MANAGEMENT CORP 0.03% of their portfolio | 173.1k $6.2m | New |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.01% of their portfolio | 172.3k $6.1m | Added +151.8k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 169.1k $6.0m | Added +4.7k |
| Squarepoint Ops LLC 0.01% of their portfolio | 166.2k $5.9m | Added +83.6k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 163.3k $5.8m | Added +36.3k |
| CenterBook Partners LP 0.28% of their portfolio | 161.7k $5.8m | New |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 161.2k $5.7m | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 160.0k $5.7m | Added +35.0k |
| Allianz Asset Management GmbH 0.00% of their portfolio | 155.9k $3.8m | Unchanged |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main 0.00% of their portfolio | 149.7k $5.3m | Added +9.7k |
| Voleon Capital Management LP 0.10% of their portfolio | 147.7k $5.3m | Reduced -263.3k |
| Legal & General Group Plc 0.00% of their portfolio | 134.3k $4.8m | Added +11.0k |
| HighTower Advisors, LLC 0.00% of their portfolio | 133.4k $4.8m | Reduced -15.5k |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 126.2k $4.5m | Reduced -465.0k |
| Templeton & Phillips Capital Management, LLC 3.02% of their portfolio | 116.2k $4.1m | Unchanged |
| PANAGORA ASSET MANAGEMENT INC 0.01% of their portfolio | 115.8k $4.1m | Reduced -52.6k |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 110.3k $3.8m | Added +28.5k |
| XTX Topco Ltd 0.05% of their portfolio | 110.0k $3.9m | New |
| VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio | 105.0k $3.7m | Added +12.0k |
| Teewinot Capital Advisers, L.L.C. 0.26% of their portfolio | 102.6k $3.7m | Unchanged |
| NATIXIS ADVISORS, LLC 0.00% of their portfolio | 100.7k $3.6m | Added +17.5k |
| CITIGROUP INC 0.00% of their portfolio | 92.8k $3.3m | Added +79.2k |
| MetLife Investment Management, LLC 0.01% of their portfolio | 88.7k $3.2m | Added +12.1k |
| Neo Ivy Capital Management 0.71% of their portfolio | 86.1k $3.1m | Reduced -28.0k |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 85.0k $3.0m | Added +19.6k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 82.6k $2.9m | Added +70.1k |
| Morse Asset Management, Inc 0.48% of their portfolio | 80.9k $2.9m | New |