Perimeter Solutions PRM Insider Ownership

NYSE PRM
$31.23 -0.82 (-2.57%)
As of: Sep 9, 2026 · 3:59 PM EDT

Insider Holdings by Owner

44.97Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
0.103%
0% pp QoQ
Shares Held by Insiders
150.50K
filed for Sep 2026
0.00% QoQ
Shares Outstanding
146.80Mn
146,803,539 shares
Direct Holdings
150.50K
Indirect: 0
Net Shares Traded (QoQ)
0
no net change in Sep 2026
Insiders Holding Shares
16
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest
Average ownership
Peak ownership

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter
Net over range
Buying quarters

Insider Ownership Summary

Quarter ending 30 Sep, 2026

As of September 09, 2026, the three largest insider holders of PRM are Partnership Master Fund, Lp Windacre (TenPercentOwner, 21.85Mn shares), Partnership Master Fund, Lp Windacre (TenPercentOwner, 21.85Mn shares), Partnership Llc Windacre (TenPercentOwner, 16.15Mn shares).

Form 4 Holdings

Insiders Holding PRM

Insiders 16
Shares held 44.97Mn
Of outstanding 30.63%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Partnership Master Fund, Lp Windacre TenPercentOwner 21,854,600 0 21,854,600 48.6% 01 Jul, 2025
2 Partnership Llc Windacre TenPercentOwner 16,148,621 0 16,148,621 35.9% 13 Jul, 2026
3 Haitham Khouri Chief Executive Officer 2,134,604 0 2,134,604 4.7% 22 May, 2026
4 Vivek Raj Director 1,398,786 0 1,398,786 3.1% 05 Mar, 2026
5 W Nicholas Howley Director 1,212,400 0 1,212,400 2.7% 24 Apr, 2026
6 Tracy Britt Cool Director 473,942 0 473,942 1.1% 05 Mar, 2026
7 Shannon Horn Business Director 445,695 0 445,695 1.0% 10 Nov, 2021
8 Robert S Henderson Director 328,416 0 328,416 0.7% 22 Oct, 2024
9 Edward D. Goldberg Chief Executive Officer 222,957 0 222,957 0.5% 10 Nov, 2021
10 Barry Lederman Chief Financial Officer 196,416 0 196,416 0.4% 10 Nov, 2021
11 Ernest C. Ii Kremling Chief Operating Officer 150,498 0 150,498 0.3% 10 Nov, 2021
12 Bernt G Ii Iversen Director 126,861 0 126,861 0.3% 29 Oct, 2024
13 Sean P Hennessy Director 100,000 0 100,000 0.2% 10 Nov, 2021
14 Noriko Yokozuka General Counsel 94,314 0 94,314 0.2% 16 Dec, 2025
15 Stephen Cornwall Chief Commercial Officer 42,087 0 42,087 0.1% 23 Nov, 2021
16 Jorge Valladares Director 0 42,000 42,000 0.1% 13 Jun, 2024

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

428 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
26 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 378,600 $36.22 $13.71Mn 21,476,000 Direct
26 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 150,000 $34.98 $5.25Mn 21,326,000 Direct
26 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 2,296,400 $34.40 $79.00Mn 19,029,600 Direct
26 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 20,000 $36.25 $725.00K 19,009,600 Direct
26 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 548,479 $34.51 $18.93Mn 18,461,121 Direct
29 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 437,500 $33.00 $14.44Mn 18,023,621 Direct
30 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 1,875,000 $33.90 $63.56Mn 16,148,621 Direct
26 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 378,600 $36.22 $13.71Mn 21,476,000 Direct
26 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 150,000 $34.98 $5.25Mn 21,326,000 Direct
26 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 2,296,400 $34.40 $79.00Mn 19,029,600 Direct
26 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 20,000 $36.25 $725.00K 19,009,600 Direct
26 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 548,479 $34.51 $18.93Mn 18,461,121 Direct
29 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 437,500 $33.00 $14.44Mn 18,023,621 Direct
30 Jun, 2026 Partnership Llc Windacre TenPercentOwner Disposed S 1,875,000 $33.90 $63.56Mn 16,148,621 Direct
20 May, 2026 Haitham Khouri Chief Executive Officer Disposed S 20,300 $34.09 $692.03K 2,083,850 Direct
21 May, 2026 Haitham Khouri Chief Executive Officer Disposed S 91,724 $31.91 $2.93Mn 1,992,126 Direct
22 May, 2026 Haitham Khouri Chief Executive Officer Disposed S 117,511 $31.19 $3.67Mn 1,874,615 Direct
13 May, 2026 Kyle Sable Chief Financial Officer Acquired M 49,540 $8.36 $414.15K 49,540 Direct
13 May, 2026 Kyle Sable Chief Financial Officer Disposed S 46,263 $33.05 $1.53Mn 3,277 Direct
13 May, 2026 Kyle Sable Chief Financial Officer Disposed S 3,277 $33.59 $110.07K 0 Direct