Quick Takeaways
- PRM - Perimeter Solutions, Inc. has 21 insiders with reported activity on this page.
- Net insider value flow over the last year: -$35,049,192.
- Recent transaction rows are available for direct filing-level review.
Insider Transactions Reported by 21 Insiders of Perimeter Solutions, Inc.
- Symbol
- PRM on NYSE
- Location
- Clayton, MO
What Changed
- Buy value: $3,559,308; sell value: $38,608,500.
- Net share flow: -1,655,594.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$35,049,192.
Buys
$3,559,308
Shares: 254,600
Insiders: 1
Sells
$38,608,500
Shares: 1,910,194
Insiders: 6
Net
-$35,049,192
Shares: -1,655,594
Insiders: -5
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 650,000 | $0 | $15,403,421 | -$15,403,421 |
| 3-6 | 0 | 237,500 | $0 | $6,757,500 | -$6,757,500 |
| 6-9 | 0 | 365,000 | $0 | $8,127,250 | -$8,127,250 |
| 9-12 | 254,600 | 657,694 | $3,559,308 | $8,320,329 | -$4,761,021 |
Perimeter Solutions, Inc. executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| WindAcre Partnership Master Fund, LP | 10%+ Owner | $305,527,308 | $0 | 0% | Filing P/S | 27 Jun 2025 |
| William N. Thorndike Jr. | Director | $197,856,506 | -$15,403,421 | -7.2% | Filing P/S | 09 Mar 2026 |
| Haitham Khouri | Chief Executive Officer, Director | $57,569,544 | Mixed | 03 Mar 2026 | ||
| Vivek Raj | Director | $18,609,441 | -$5,322,271 | -22% | Mixed | 03 Mar 2026 |
| W. Nicholas Howley | Director | $14,803,404 | Median | 23 Apr 2026 | ||
| Tracy Britt Cool | Director | $6,853,488 | Mixed | 03 Mar 2026 | ||
| Shannon Horn | Business Director | $4,657,513 | Mixed | 30 Mar 2022 | ||
| Edward D. Goldberg | Vice Chairman, Director | $2,856,079 | Mixed | 20 Feb 2025 | ||
| Barry Lederman | Chief Financial Officer | $2,052,547 | Mixed | 30 Mar 2022 | ||
| Ernest C. Kremling II | Chief Operating Officer | $1,572,704 | Mixed | 30 Mar 2022 | ||
| Noriko Yokozuka | General Counsel | $1,341,145 | -$3,910,500 | -74% | Filing P/S | 26 Feb 2026 |
| Kevin M. Stein | Director | $1,201,750 | Mixed | 08 Nov 2021 | ||
| Stephen Cornwall | Chief Commercial Officer | $439,809 | Mixed | 30 Mar 2022 | ||
| Kyle Sable | Chief Financial Officer | $0 | -$3,729,000 | -100% | Mixed | 26 Feb 2026 |
| Jeffrey Emery | President - Global Fire Safety | $0 | -$6,684,000 | -100% | Mixed | 26 Feb 2026 |
| Grant Bowman | President, Specialty Products | Mixed | 26 Feb 2026 | |||
| Sean P. Hennessy | Director | Mixed | 26 Feb 2026 | |||
| III Jorge L. Valladares | Director | Mixed | 26 Feb 2026 | |||
| Robert S. Henderson | Director | Mixed | 26 Feb 2026 | |||
| Bernt G. Iversen II | Director | Mixed | 26 Feb 2026 | |||
| Charles W. Kropp | Chief Financial Officer | Mixed | 06 May 2022 |
Top shareholders of Perimeter Solutions, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| WINDACRE PARTNERSHIP LLC |
13F
|
Company |
13%
|
21,854,600
|
$601,657,138 | — | 31 Dec 2025 | |
| WindAcre Partnership Master Fund, LP |
3/4/5
|
10%+ Owner |
13%
|
21,854,600
|
$305,527,308 | $0 | 27 Jun 2025 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
6.7%
|
10,879,001
|
$299,499,897 | — | 31 Dec 2025 | |
| BlackRock, Inc. |
13F
|
Company |
6.7%
|
10,866,996
|
$299,168,400 | — | 31 Dec 2025 | |
| William N. Thorndike Jr. |
13D/G
3/4/5
|
Director |
5.7%
|
9,309,341
|
$254,703,570 | $0 | 03 Mar 2026 | |
| FMR LLC |
13F
13D/G
|
Company |
6.7%
from 13D/G
|
8,769,495
|
$241,424,194 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
5.2%
|
8,570,699
|
$235,951,343 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
2.9%
|
4,735,822
|
$130,380,665 | — | 31 Dec 2025 | |
| JANUS HENDERSON GROUP PLC |
13F
|
Company |
2.3%
|
3,691,773
|
$101,634,196 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.1%
|
3,421,820
|
$94,217,969 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
2%
|
3,200,527
|
$88,110,508 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
1.6%
|
2,537,263
|
$69,850,851 | — | 31 Dec 2025 | |
| DF DENT & CO INC |
13F
|
Company |
1.6%
|
2,535,404
|
$69,799,671 | — | 31 Dec 2025 | |
| BALANCE CAPITAL PARTNERS L.P. |
13F
|
Company |
1.5%
|
2,510,521
|
$69,114,643 | — | 31 Dec 2025 | |
| Matrix Capital Management Company, LP |
13D/G
|
— |
4.5%
|
6,554,000
|
$66,850,800 | $0 | 31 Dec 2024 | |
| Senator Investment Group LP |
13F
|
Company |
1.4%
|
2,348,000
|
$64,640,440 | — | 31 Dec 2025 | |
| BROWN BROTHERS HARRIMAN & CO |
13F
|
Company |
1.4%
|
2,259,089
|
$62,192,720 | — | 31 Dec 2025 | |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
|
Company |
1.3%
|
2,132,437
|
$58,705,991 | — | 31 Dec 2025 | |
| Haitham Khouri |
3/4/5
|
Chief Executive Officer, Director |
—
mixed-class rows
|
3,304,150
mixed-class rows
|
$57,569,544 | — | 03 Mar 2026 | |
| Corient Private Wealth LLC |
13F
|
Company |
1.2%
|
2,034,505
|
$55,940,401 | — | 31 Dec 2025 | |
| EQUITABLE TRUST CO |
13F
|
Company |
1.2%
|
1,916,010
|
$52,747,755 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
1%
|
1,659,012
|
$45,672,600 | — | 31 Dec 2025 | |
| PRIMECAP MANAGEMENT CO/CA/ |
13F
|
Company |
1%
|
1,644,081
|
$45,261,550 | — | 31 Dec 2025 | |
| T. Rowe Price Investment Management, Inc. |
13F
|
Company |
1%
|
1,632,406
|
$44,941,000 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.94%
|
1,539,089
|
$42,371,149 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.84%
|
1,366,933
|
$37,631,665 | — | 31 Dec 2025 | |
| East Coast Asset Management, LLC. |
13F
|
Company |
0.84%
|
1,366,380
|
$37,616,441 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.79%
|
1,294,686
|
$35,642,707 | — | 31 Dec 2025 | |
| Pennant Investors, LP |
13F
|
Company |
0.73%
|
1,193,000
|
$32,843,290 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.72%
|
1,171,049
|
$32,238,979 | — | 31 Dec 2025 | |
| RAYMOND JAMES FINANCIAL INC |
13F
|
Company |
0.67%
|
1,096,625
|
$30,452,854 | — | 31 Dec 2025 | |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.53%
|
869,718
|
$23,943,337 | — | 31 Dec 2025 | |
| Skye Global Management LP |
13F
|
Company |
0.44%
|
712,000
|
$19,601,360 | — | 31 Dec 2025 | |
| Vivek Raj |
3/4/5
|
Director |
—
mixed-class rows
|
684,560
mixed-class rows
|
$18,609,441 | -$5,322,271 | 03 Mar 2026 | |
| BESSEMER GROUP INC |
13F
|
Company |
0.4%
|
660,508
|
$18,184,000 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.4%
|
647,897
|
$17,836,604 | — | 31 Dec 2025 | |
| CREDIT AGRICOLE S A |
13F
|
Individual |
0.39%
|
633,309
|
$17,434,997 | — | 31 Dec 2025 | |
| Catawba River Capital |
13F
|
Company |
0.37%
|
600,896
|
$16,542,666 | — | 31 Dec 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0.35%
|
570,760
|
$15,713,010 | — | 31 Dec 2025 | |
| Pennant Select, LLC |
13F
|
Company |
0.35%
|
570,038
|
$15,693,146 | — | 31 Dec 2025 | |
| AQR CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.35%
|
566,319
|
$15,590,763 | — | 31 Dec 2025 | |
| W. Nicholas Howley |
3/4/5
|
Director |
0.37%
|
606,200
|
$14,803,404 | — | 23 Apr 2026 | |
| TUDOR INVESTMENT CORP ET AL |
13F
|
Company |
0.32%
|
524,692
|
$14,444,771 | — | 31 Dec 2025 | |
| IEQ CAPITAL, LLC |
13F
|
Company |
0.31%
|
510,996
|
$14,067,720 | — | 31 Dec 2025 | |
| WEITZ INVESTMENT MANAGEMENT, INC. |
13F
|
Company |
0.31%
|
509,400
|
$14,023,782 | — | 31 Dec 2025 | |
| NORGES BANK |
13F
|
Company |
0.31%
|
503,335
|
$13,856,813 | — | 31 Dec 2025 | |
| NORDEA INVESTMENT MANAGEMENT AB |
13F
|
Company |
0.3%
|
486,421
|
$13,473,862 | — | 31 Dec 2025 | |
| Focus Partners Wealth |
13F
|
Company |
0.28%
|
463,832
|
$12,769,309 | — | 31 Dec 2025 | |
| Qube Research & Technologies Ltd |
13F
|
Company |
0.28%
|
451,859
|
$12,439,678 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.27%
|
441,223
|
$12,146,879 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for Perimeter Solutions, Inc.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| W. Nicholas Howley | PRM | Common Stock | Gift | -85.2% | -3,480,640 | 606,200 | 23 Apr 2026 | Direct | ||
| W. Nicholas Howley | PRM | Common Stock | Gift | -19.7% | -1,000,000 | 4,086,840 | 01 Apr 2026 | Direct | ||
| William N. Thorndike Jr. | PRM | Common Stock | Sale | -1.16% | $2,318,000 | $23.18 | -100,000 | 8,535,656 | 11 Mar 2026 | Direct |
| William N. Thorndike Jr. | PRM | Common Stock | Sale | -1.14% | $2,363,000 | $23.63 | -100,000 | 8,635,656 | 10 Mar 2026 | Direct |
| William N. Thorndike Jr. | PRM | Common Stock | Sale | -1.41% | $2,920,921 | $23.37 | -125,000 | 8,735,656 | 09 Mar 2026 | Direct |
| William N. Thorndike Jr. | PRM | Common Stock | Sale | -1.12% | $2,363,000 | $23.63 | -100,000 | 8,860,656 | 06 Mar 2026 | Direct |
| William N. Thorndike Jr. | PRM | Common Stock | Sale | -1.1% | $2,406,000 | $24.06 | -100,000 | 8,960,656 | 05 Mar 2026 | Direct |
| William N. Thorndike Jr. | PRM | Common Stock | Sale | -1.36% | $3,032,500 | $24.26 | -125,000 | 9,060,656 | 04 Mar 2026 | Direct |
| Tracy Britt Cool | PRM | Common Stock | Award | 35.7% | 65,843 | 250,493 | 03 Mar 2026 | Direct | ||
| William N. Thorndike Jr. | PRM | Common Stock | Award | 154.9% | 5,582,492 | 9,185,656 | 03 Mar 2026 | Direct | ||
| Vivek Raj | PRM | Common Stock | Award | 456.7% | 555,859 | 677,560 | 03 Mar 2026 | Direct | ||
| W. Nicholas Howley | PRM | Common Stock | Gift | -17.8% | -1,101,852 | 5,086,840 | 03 Mar 2026 | Direct | ||
| W. Nicholas Howley | PRM | Common Stock | Award | 920.9% | 5,582,492 | 6,188,692 | 03 Mar 2026 | Direct | ||
| Haitham Khouri | PRM | Common Stock | Award | 317.6% | 1,600,317 | 2,104,150 | 03 Mar 2026 | Direct | ||
| Bernt G. Iversen II | PRM | Stock Option (right to buy) | Award | 35,682 | 23,333 | 26 Feb 2026 | Direct | |||
| Grant Bowman | PRM | Stock Option (right to buy) | Award | 232.3% | 139,820 | 200,000 | 26 Feb 2026 | Direct | ||
| Haitham Khouri | PRM | Stock Option (right to buy) | Award | 96.2% | 588,489 | 1,200,000 | 26 Feb 2026 | Direct | ||
| Jeffrey Emery | PRM | Stock Option (right to buy) | Award | 66.7% | 200,000 | 500,000 | 26 Feb 2026 | Direct | ||
| Kyle Sable | PRM | Stock Option (right to buy) | Award | 130.8% | 170,000 | 300,000 | 26 Feb 2026 | Direct | ||
| Noriko Yokozuka | PRM | Stock Option (right to buy) | Award | 50% | 120,000 | 360,000 | 26 Feb 2026 | Direct | ||
| Sean P. Hennessy | PRM | Stock Option (right to buy) | Award | 35,944 | 28,000 | 26 Feb 2026 | Direct | |||
| Robert S. Henderson | PRM | Stock Option (right to buy) | Award | 38,599 | 28,000 | 26 Feb 2026 | Direct | |||
| Tracy Britt Cool | PRM | Stock Option (right to buy) | Award | 28,944 | 28,000 | 26 Feb 2026 | Direct | |||
| Vivek Raj | PRM | Stock Option (right to buy) | Award | 28,944 | 28,000 | 26 Feb 2026 | Direct | |||
| III Jorge L. Valladares | PRM | Stock Option (right to buy) | Award | 12,388 | 6,194 | 26 Feb 2026 | Direct | |||
| Noriko Yokozuka | PRM | Common Stock | Sale | -74.5% | $3,910,500 | $28.44 | -137,500 | 47,157 | 12 Dec 2025 | Direct |
| Noriko Yokozuka | PRM | Common Stock | Options Exercise | 291.6% | 137,500 | 184,657 | 12 Dec 2025 | Direct | ||
| Noriko Yokozuka | PRM | Stock Option (right to buy) | Options Exercise | -100% | -137,500 | 0 | 12 Dec 2025 | Direct | ||
| Kyle Sable | PRM | Common Stock | Sale | -100% | $2,847,000 | $28.47 | -100,000 | 0 | 12 Dec 2025 | Direct |
| Kyle Sable | PRM | Common Stock | Options Exercise | 100,000 | 100,000 | 12 Dec 2025 | Direct | |||
| Kyle Sable | PRM | Stock Option (right to buy) | Options Exercise | -33.3% | -100,000 | 200,000 | 12 Dec 2025 | Direct | ||
| William N. Thorndike Jr. | PRM | Common Stock | Gift | -15.8% | -673,685 | 3,603,164 | 09 Dec 2025 | Direct | ||
| W. Nicholas Howley | PRM | Common Stock | Gift | -55.2% | -746,767 | 606,200 | 24 Nov 2025 | Direct | ||
| Vivek Raj | PRM | Common Stock | Sale | -17% | $561,250 | $22.45 | -25,000 | 121,701 | 11 Sep 2025 | Direct |
| Kyle Sable | PRM | Common Stock | Sale | -100% | $882,000 | $22.05 | -40,000 | 0 | 05 Sep 2025 | Direct |
| Kyle Sable | PRM | Common Stock | Options Exercise | 40,000 | 40,000 | 05 Sep 2025 | Direct | |||
| Kyle Sable | PRM | Stock Option (right to buy) | Options Exercise | -100% | -40,000 | 0 | 05 Sep 2025 | Direct | ||
| Jeffrey Emery | PRM | Common Stock | Sale | -100% | $6,684,000 | $22.28 | -300,000 | 0 | 04 Sep 2025 | Direct |
| Jeffrey Emery | PRM | Common Stock | Options Exercise | 300,000 | 300,000 | 04 Sep 2025 | Direct | |||
| Jeffrey Emery | PRM | Stock Option (right to buy) | Options Exercise | -50% | -300,000 | 300,000 | 04 Sep 2025 | Direct | ||
| WindAcre Partnership Master Fund, LP | PRM | Ordinary shares | Purchase | 1.18% | $3,559,308 | $13.98 | 254,600 | 21,854,600 | 27 Jun 2025 | Direct |
| WindAcre Partnership Master Fund, LP | PRM | Total Return Swap | Sale | -100% | $3,559,308 | $13.98 | -254,600 | 0 | 27 Jun 2025 | Direct |
| Tracy Britt Cool | PRM | Common Stock | Other | 6.46% | 11,201 | 184,650 | 20 Jun 2025 | Direct | ||
| W. Nicholas Howley | PRM | Common Stock | Other | 123.2% | 746,767 | 1,352,967 | 20 Jun 2025 | Direct | ||
| Vivek Raj | PRM | Common Stock | Other | 115.3% | 78,569 | 146,701 | 20 Jun 2025 | Direct | ||
| Haitham Khouri | PRM | Common Stock | Other | 101.7% | 254,000 | 503,833 | 20 Jun 2025 | Direct | ||
| William N. Thorndike Jr. | PRM | Common Stock | Other | 21.2% | 746,767 | 4,276,849 | 20 Jun 2025 | Direct | ||
| Vivek Raj | PRM | Common Stock | Sale | -32% | $374,400 | $11.70 | -32,000 | 68,132 | 21 May 2025 | Direct |
| Vivek Raj | PRM | Common Stock | Sale | -40.7% | $814,710 | $11.84 | -68,810 | 100,132 | 20 May 2025 | Direct |
| Vivek Raj | PRM | Common Stock | Sale | -37.2% | $1,178,000 | $11.78 | -100,000 | 168,942 | 19 May 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.