Innospec IOSP Insider Ownership

NASDAQ IOSP

$99.16 +1.17 (+1.19%)

At close: Oct 20, 2026 · 4:00 PM EDT

Insider Holdings by Owner

586.91K Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

1.60%

■0% pp QoQ

Shares Held by Insiders

394.46K

filed for Sep 2026

■0.00% QoQ

Shares Outstanding

24.64Mn

24,644,000 shares

Direct Holdings

394.46K

Indirect: 0

Net Shares Traded (QoQ)

no net change in Sep 2026

Insiders Holding Shares

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

Updated Oct 6, 2026

Over the past year, IOSP insiders bought $25,191 of stock (340 shares) and sold $635,631 (8.24K shares) on the open market.

Behind Innospec's open-market trades in the past 12 months were one insider buying and 5 insiders selling.
Among Innospec's insiders, the largest open-market purchases in the past 12 months were by Leslie J. Parrette (Director), totaling $25,191 (340 shares), most recently on November 14, 2025.
On the selling side, Ian Cleminson (EVP & CFO) sold the most Innospec stock on the open market over the past 12 months, $364,410 (4.76K shares), most recently on February 27, 2026.
The latest open-market trade in IOSP stock by an insider was a sale of 1.03K shares for $77,758 by David B. Jones (SVP, GC & CCO) on March 3, 2026.
Outside the open market, Innospec insiders received 61.16K shares in stock awards, acquired 1.03K shares through option exercises and conversions and gave up 9.41K shares to cover taxes or exercise prices over the past 12 months.
Business Quant data shows Innospec insiders holding 394.46K shares in total in their latest Form 4 filings, or 1.60% of the 24.64Mn shares outstanding; that total is unchanged from 394.46K shares at the end of Q2 2026 and up 11.34% from 354.29K shares at the end of Q3 2025.
By type of ownership, IOSP insiders hold all of their 394.46K shares directly.
Per Business Quant, 13 insiders of IOSP hold shares, counting officers, directors and 10% owners who have filed a Form 4 in the past two years.
Innospec's three biggest insider holders are Patrick Williams (President & CEO, 231.53K shares), Ian Malcolm McRobbie (Senior VP RT, 36.68K shares) and Ian Cleminson (EVP & CFO, 20.36K shares), based on their latest Form 4 filings.
The holding of Patrick Williams makes up 58.70% of all shares held by Innospec insiders.
In the past year, 13 insiders of Innospec submitted 39 Form 4 filings reporting trades, awards or other transactions.
The insider holdings and trades above for Innospec reflect Form 4 filings through October 5, 2026.

Form 4 Holdings

Insiders Holding IOSP

Insiders 14

Shares held 586.91K

Of outstanding 2.38%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Patrick Williams	President Ceo	398,048	398,048	67.8%	03 Mar, 2026
2	Ian Malcolm Mcrobbie	Senior Vp Rt	36,679	36,679	6.2%	01 Mar, 2023
3	David B. Jones	Svp, Gc Cco	21,227	21,227	3.6%	03 Mar, 2026
4	Ian Cleminson	Evp Cfo	20,357	20,357	3.5%	06 Mar, 2026
5	Philip John Boon	Executive Vp Business Ops	20,079	20,079	3.4%	24 Feb, 2025
6	Corbin Barnes	Svp, Corporate Dev And Ir	14,927	14,927	2.5%	03 Mar, 2026
7	Robert I Paller	Director	14,343	14,343	2.4%	28 Feb, 2024
8	Leslie J Parrette	Director	10,586	10,586	1.8%	24 Feb, 2026
9	Milton C Blackmore	Director	10,530	10,530	1.8%	06 Mar, 2026
10	Hardy Louis Iii Griffin	Svp, Human Resources	10,161	10,161	1.7%	03 Mar, 2026
11	Larry Padfield	Director	9,453	9,453	1.6%	06 Mar, 2026
12	David Landless	Director	7,632	7,632	1.3%	06 Mar, 2026
13	Claudia Poccia	Director	6,508	6,508	1.1%	06 Mar, 2026
14	Elizabeth K Arnold	Director	6,376	6,376	1.1%	25 Feb, 2026

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

2,334 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
01 Oct, 2026	David B. Jones	Svp, Gc Cco	Acquired A	3,188	$0.00	$0	3,188	Direct
01 Oct, 2026	Ian Cleminson	Evp Cfo	Acquired A	4,792	$0.00	$0	4,792	Direct
01 Oct, 2026	Hardy Louis Iii Griffin	Svp, Human Resources	Acquired A	2,685	$0.00	$0	2,685	Direct
01 Oct, 2026	Corbin Barnes	Svp, Corporate Dev And Ir	Acquired A	2,642	$0.00	$0	2,642	Direct
01 Oct, 2026	Patrick Williams	President Ceo	Acquired A	22,203	$0.00	$0	22,203	Direct
01 Oct, 2026	Ian Malcolm Mcrobbie	Senior Vp Rt	Acquired A	3,164	$0.00	$0	3,164	Direct
27 Feb, 2026	Ian Cleminson	Evp Cfo	Disposed S	1,149	$76.30	$87.67K	21,588	Direct
27 Feb, 2026	Claudia Poccia	Director	Disposed S	57	$76.30	$4.35K	6,570	Direct
27 Feb, 2026	Larry Padfield	Director	Disposed S	287	$76.30	$21.90K	9,760	Direct
27 Feb, 2026	David Landless	Director	Disposed S	287	$76.30	$21.90K	7,939	Direct
27 Feb, 2026	Milton C Blackmore	Director	Disposed S	287	$76.30	$21.90K	10,837	Direct
27 Feb, 2026	Milton C Blackmore	Director	Disposed S	307	$76.79	$23.57K	10,530	Direct
27 Feb, 2026	Ian Cleminson	Evp Cfo	Disposed S	1,231	$76.79	$94.53K	20,357	Direct
27 Feb, 2026	David Landless	Director	Disposed S	307	$76.79	$23.57K	7,632	Direct
27 Feb, 2026	Larry Padfield	Director	Disposed S	307	$76.79	$23.57K	9,453	Direct
27 Feb, 2026	Claudia Poccia	Director	Disposed S	62	$76.79	$4.76K	6,508	Direct
27 Feb, 2026	Patrick Williams	President Ceo	Disposed F	7,966	$78.34	$624.06K	231,535	Direct
27 Feb, 2026	David B. Jones	Svp, Gc Cco	Disposed F	875	$78.34	$68.55K	15,721	Direct
27 Feb, 2026	Claudia Poccia	Director	Disposed S	119	$76.56	$9.11K	6,508	Direct
27 Feb, 2026	David Landless	Director	Disposed S	594	$76.56	$45.47K	7,632	Direct

Showing 1 to 20 of 2,334 transactions