Innospec Inc. IOSP NASDAQ

NASDAQ Global Select • Basic Materials • Chemicals - Specialty • US • USD

SharesGrow Score

71/100

3/7 Pass

SharesGrow Intrinsic Value

Innospec Inc. (IOSP) has 20 known insider and institutional holders on record. The largest holder is Williams Patrick with 231,535 shares. Other notable holders include Cleminson Ian and BOON PHILIP JOHN.

Over the last 12 months, insiders have made 40 transactions in IOSP stock — 19 buys (valued at $25.19K) and 12 sells (valued at $591.48K). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.

IOSP Insider Ownership

Top Holder

Williams Patrick

231,535 shares

Buys (12 mo)

$25.19K value

Sells (12 mo)

$591.48K value

12-Month Transaction Activity

Buy 48%

Sell 30%

Top Insider Holders

#	Name	Role	Shares Owned	Last Filed	Relative Size
1	Williams Patrick	President & CEO	231,535	2026-03-03	100%
2	Cleminson Ian	EVP & CFO	20,357	2026-03-06	9%
3	Boon Philip John	Executive VP Business Ops	20,079	2025-02-24	9%
4	Jones David B.	SVP, Gc & Cco	15,721	2026-03-03	7%
5	Paller Robert I	Director	14,343	2024-02-28	6%
6	Barnes Corbin	SVP, Corporate Dev and IR	13,080	2026-03-03	6%
7	Blackmore Milton C	Director	10,530	2026-03-06	5%
8	Griffin Hardy Louis Iii	SVP, Human Resources	10,161	2026-03-03	4%
9	Padfield Larry	Director	9,453	2026-03-06	4%
10	Landless David	Director	7,632	2026-03-06	3%
11	Parrette Leslie J	Director	7,376	2026-02-24	3%
12	Poccia Claudia	Director	6,508	2026-03-06	3%
13	Arnold Elizabeth K	Director	6,376	2026-02-25	3%
14	David Bentley Jones	VP, Gc & Cco	5,176	2019-02-27	2%
15	Mcrobbie Ian Malcolm	Senior VP R&t	2,228	2026-02-25	1%
16	Watt Brian	VP, Strat Plan & Regulatory	2,016	2021-05-13	1%
17	Curran Philip	Group Financial Controller	1,993	2019-06-05	1%
18	Williams David Earl	Gc & Chief Compliance Officer	644	2018-05-25	0%
19	Blair Graeme	Head of Group Finance	520	2026-02-25	0%
20	Roeser Joachim	Director	313	2020-02-26	0%

Recent Transactions (last 12 months)

Date	Name	Role	Type	Shares	Price	Value
2026-02-27	Poccia Claudia	Director	Informative Sell	62	$76.79	$4.76K
2026-02-27	Landless David	Director	Informative Sell	307	$76.79	$23.57K
2026-02-27	Padfield Larry	Director	Informative Sell	307	$76.79	$23.57K
2026-02-27	Blackmore Milton C	Director	Informative Sell	307	$76.79	$23.57K
2026-02-27	Cleminson Ian	EVP & CFO	Informative Sell	1,231	$76.79	$94.53K
2026-02-27	Griffin Hardy Louis Iii	SVP, Human Resources	Tax Withholding of RSU	401	$78.34	$31.41K
2026-02-27	Barnes Corbin	SVP, Corporate Dev and IR	Tax Withholding of RSU	166	$78.34	$13K
2026-02-27	Poccia Claudia	Director	Informative Sell	119	$76.56	$9.11K
2026-03-03	Jones David B.	SVP, Gc & Cco	Informative Sell	1,028	$75.64	$77.76K
2026-02-27	Jones David B.	SVP, Gc & Cco	Tax Withholding of RSU	875	$78.34	$68.55K
2026-02-27	Landless David	Director	Informative Sell	594	$76.56	$45.47K
2026-02-27	Padfield Larry	Director	Informative Sell	594	$76.56	$45.47K
2026-02-27	Blackmore Milton C	Director	Informative Sell	594	$76.56	$45.47K
2026-02-27	Cleminson Ian	EVP & CFO	Informative Sell	2,380	$76.56	$182.21K
2026-02-27	Williams Patrick	President & CEO	Tax Withholding of RSU	7,966	$78.34	$624.06K
2026-02-23	Griffin Hardy Louis Iii	SVP, Human Resources	RSU Award	2,521	-	-
2026-02-23	Barnes Corbin	SVP, Corporate Dev and IR	RSU Award	2,481	-	-
2026-02-23	Blair Graeme	Head of Group Finance	RSU Award	520	-	-
2026-02-23	Arnold Elizabeth K	Director	RSU Award	1,539	-	-
2026-02-23	Jones David B.	SVP, Gc & Cco	RSU Award	2,993	-	-
2026-02-23	Cleminson Ian	EVP & CFO	RSU Award	4,499	-	-
2026-02-23	Williams Patrick	President & CEO	RSU Award	20,846	-	-
2026-02-23	Mcrobbie Ian Malcolm	Senior VP R&t	RSU Award	2,228	-	-
2026-02-23	Poccia Claudia	Director	RSU Award	1,539	-	-
2026-02-23	Landless David	Director	RSU Award	1,539	-	-