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Perimeter Solutions, Inc. director William N. Thorndike Jr. reported selling a total of 325,000 shares of common stock in open-market transactions. The sales took place over three days, with 125,000 shares sold on March 4, 2026, 100,000 shares on March 5, 2026, and 100,000 shares on March 6, 2026.
The reported weighted average sale prices were $24.26 on March 4, $24.06 on March 5, and $23.63 on March 6, 2026, with actual trade prices on each day ranging within the bands described in the footnotes. Following these transactions, Thorndike directly held 8,860,656 shares of Perimeter Solutions common stock.
Perimeter Solutions, Inc. director Tracy Britt Cool acquired 65,843 shares of common stock on March 3, 2026 through an exempt grant from the company. The shares were awarded at a stated price of $0.00 per share, increasing her directly held stake to 250,493 shares of common stock. The award is described as an exempt acquisition from the issuer under Rule 16b-3(d) based on her membership interests in EverArc Founders, LLC.
Perimeter Solutions, Inc. director William N. Thorndike Jr reported an exempt acquisition of 5,582,492 shares of common stock on March 3, 2026. The shares were acquired from the issuer at a stated price of $0.00 per share under a grant, award, or similar arrangement. Following this transaction, his directly held common stock increased to 9,185,656 shares. A footnote explains the acquisition is pursuant to Rule 16b-3(d) and is based on his membership interests in EverArc Founders, LLC.
Perimeter Solutions director Raj Vivek received a large stock award from the company. On the reported date, he acquired 555,859 shares of Perimeter Solutions, Inc. common stock at a stated price of $0.00 per share through a grant or award transaction exempt under Rule 16b-3(d), based on his membership interests in EverArc Founders, LLC.
After this award, his directly reported holdings increased to 677,560 common shares, reflecting the size of the equity grant rather than an open-market purchase.
Perimeter Solutions director W. Nicholas Howley reported two stock transactions. On March 3, 2026, he acquired 5,582,492 shares of Perimeter Solutions, Inc. common stock in an exempt transaction from the issuer under Rule 16b-3(d), based on his membership interests in EverArc Founders, LLC.
On the same date, he disposed of 1,101,852 shares through a bona fide gift to a 501(c)(3) nonprofit organization in an exempt transaction under Rule 16b-5. After these transactions, he directly owned 5,086,840 shares of common stock.
Perimeter Solutions, Inc. director and Chief Executive Officer Haitham Khouri reported an equity award of company common stock. On the reported date, he acquired 1,600,317 shares of common stock at a stated price of $0.00 per share as a grant or award acquisition.
Following this exempt acquisition from the issuer pursuant to Rule 16b-3(d), his directly held common stock ownership increased to 2,104,150 shares. The footnote explains that the award is based on his membership interests in EverArc Founders, LLC.
William Thorndike submitted a Section 144 notice relating to proposed sales of Common stock of PRM. The filing shows a proposed sale of 125,000 shares dated 03/04/2026 and references an additional listed block of 667,536 shares tied to 02/15/2025 under "Securities To Be Sold." The broker listed is UBS Financial Services Inc.
Perimeter Solutions director Bernt G. Iversen II reported multiple stock option acquisitions related to performance-based vesting. On February 26, 2026, he acquired several tranches of stock options with rights to buy shares of common stock at a stated price of $0.00 per option in the table.
Footnotes explain these entries reflect vesting from prior option grants made between May 3, 2022 and December 23, 2025. Each grant vests in five equal annual installments based on the company meeting specified performance criteria for the relevant fiscal years, with 2025 performance either met or partially met, triggering vesting of portions ranging from 2,655 to 7,000 options per grant.
Perimeter Solutions, Inc. reported that executive Grant Bowman, President of Specialty Products, acquired additional stock options through performance-based vesting. An option granted on February 14, 2024 vested for 100,000 shares after 2025 performance criteria were met, bringing that award to 200,000 options outstanding. A separate option granted on February 12, 2025 vested for 39,820 shares after 2025 criteria were partially met, leaving 39,820 options outstanding for that award.