Quick Takeaways
- IOSP - INNOSPEC INC. has 17 insiders with reported activity on this page.
- Net insider value flow over the last year: -$589,305.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
Insider Transactions Reported by 17 Insiders of INNOSPEC INC.
- Symbol
- IOSP on Nasdaq
- Location
- Englewood, CO
What Changed
- Buy value: $25,191; sell value: $614,496.
- Net share flow: -7,475.
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: -$589,305.
Buys
$25,191
Shares: 340
Insiders: 1
Sells
$614,496
Shares: 7,815
Insiders: 7
Net
-$589,305
Shares: -7,475
Insiders: -6
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 7,369 | $0 | $574,075 | -$574,075 |
| 3-6 | 340 | 0 | $25,191 | $0 | +$25,191 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 446 | $0 | $40,421 | -$40,421 |
INNOSPEC INC. executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Patrick Williams | President & Ceo | $18,138,451 | Mixed | 27 Feb 2026 | ||
| Brian Robert Watt | VP, Strat Plan & Regulatory | $2,551,166 | Mixed | 10 May 2021 | ||
| Philip John Boon | Executive VP Business Ops | $2,074,185 | Filing P/S | 21 Feb 2025 | ||
| Robert I. Paller | Director | $1,788,941 | Mixed | 26 Feb 2024 | ||
| Ian Philip Cleminson | Evp & Cfo | $1,563,214 | -$182,197 | -10% | Filing P/S | 27 Feb 2026 |
| Catherine Hessner | Senior VP - Human Resources | $1,542,844 | Mixed | 10 May 2021 | ||
| David Bentley Jones | Svp, Gc & Cco | $1,111,378 | -$77,758 | -6.5% | Filing P/S | 27 Feb 2026 |
| Corbin Barnes | SVP, Corporate Dev and IR | $1,024,656 | Mixed | 27 Feb 2026 | ||
| Milton C. Blackmore | Director | $808,598 | -$129,769 | -14% | Filing P/S | 27 Feb 2026 |
| Hardy L. Griffin | Svp, Human Resources | $796,012 | Mixed | 27 Feb 2026 | ||
| Larry Padfield | Director | $725,895 | -$129,769 | -15% | Filing P/S | 27 Feb 2026 |
| David Landless | Director | $586,061 | -$45,473 | -7.2% | Filing P/S | 27 Feb 2026 |
| Leslie J. Parrette | Director | $579,827 | -$15,230 | -2.6% | Mixed | 23 Feb 2026 |
| Elizabeth K. Arnold | Director | $501,217 | Mixed | 23 Feb 2026 | ||
| Claudia Poccia | Director | $499,749 | -$9,110 | -1.8% | Filing P/S | 27 Feb 2026 |
| Ian Malcolm McRobbie | Senior VP R&T | Mixed | 23 Feb 2026 | |||
| Graeme Blair | Head of Group Finance | Mixed | 23 Feb 2026 |
Top shareholders of INNOSPEC 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 |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
|
Company |
15%
|
3,681,666
|
$330,981,773 | $0 | 31 Mar 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
12%
|
3,121,151
|
$238,892,898 | — | 31 Dec 2025 | |
| Allspring Global Investments Holdings, LLC |
13F
|
Company |
9.4%
|
2,356,503
|
$179,754,049 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
4.7%
|
1,175,122
|
$89,946,408 | — | 31 Dec 2025 | |
| VICTORY CAPITAL MANAGEMENT INC |
13F
|
Company |
3.8%
|
950,074
|
$72,718,664 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
3.8%
|
949,038
|
$72,639,369 | — | 31 Dec 2025 | |
| WASATCH ADVISORS LP |
13D/G
|
— |
2.1%
|
528,144
|
$47,480,146 | -$94,572,193 | 31 Mar 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.4%
|
609,220
|
$46,637,981 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
2.1%
|
533,312
|
$40,819,700 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
2%
|
502,603
|
$38,469,234 | — | 31 Dec 2025 | |
| WESTWOOD HOLDINGS GROUP INC |
13F
|
Company |
2%
|
491,451
|
$37,615,660 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
1.9%
|
484,968
|
$37,119,453 | — | 31 Dec 2025 | |
| Medina Value Partners, LLC |
13F
|
Company |
1.5%
|
378,769
|
$28,990,979 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
1.5%
|
373,540
|
$28,590,752 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
1.3%
|
322,358
|
$24,673,283 | — | 31 Dec 2025 | |
| Qube Research & Technologies Ltd |
13F
|
Company |
1.3%
|
320,504
|
$24,531,376 | — | 31 Dec 2025 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
1.2%
|
309,927
|
$23,721,812 | — | 31 Dec 2025 | |
| BROWN ADVISORY INC |
13F
|
Company |
1.2%
|
305,977
|
$23,419,533 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
1.2%
|
305,875
|
$23,411,673 | — | 31 Dec 2025 | |
| ROYCE & ASSOCIATES LP |
13F
|
Company |
1.2%
|
305,226
|
$23,361,998 | — | 31 Dec 2025 | |
| Jeffrey L. Gendell |
13F
|
Individual |
1.1%
|
285,351
|
$21,840,766 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
1.1%
|
274,689
|
$21,024,696 | — | 31 Dec 2025 | |
| Western Standard LLC |
13F
|
Company |
1.1%
|
268,367
|
$20,540,810 | — | 31 Dec 2025 | |
| AQR CAPITAL MANAGEMENT LLC |
13F
|
Company |
1.1%
|
268,151
|
$20,524,308 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.97%
|
243,535
|
$18,640,214 | — | 31 Dec 2025 | |
| Patrick Williams |
3/4/5
|
PRESIDENT & CEO |
0.92%
|
231,535
|
$18,138,451 | — | 27 Feb 2026 | |
| Assenagon Asset Management S.A. |
13F
|
Company |
0.71%
|
178,204
|
$13,639,734 | — | 31 Dec 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.64%
|
159,514
|
$12,209,202 | — | 31 Dec 2025 | |
| TWO SIGMA ADVISERS, LP |
13F
|
Company |
0.64%
|
159,200
|
$12,185,168 | — | 31 Dec 2025 | |
| JANUS HENDERSON GROUP PLC |
13F
|
Company |
0.6%
|
150,851
|
$11,545,721 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
0.57%
|
142,055
|
$10,872,889 | — | 31 Dec 2025 | |
| NORGES BANK |
13F
|
Company |
0.56%
|
139,200
|
$10,654,368 | — | 31 Dec 2025 | |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC |
13F
|
Company |
0.55%
|
138,401
|
$10,593,213 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.55%
|
137,828
|
$10,549,383 | — | 31 Dec 2025 | |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.5%
|
125,062
|
$9,572,245 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
0.48%
|
120,300
|
$9,207,762 | — | 31 Dec 2025 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.47%
|
118,107
|
$9,039,910 | — | 31 Dec 2025 | |
| HRT FINANCIAL LP |
13F
|
Company |
0.47%
|
116,932
|
$8,949,000 | — | 31 Dec 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
0.44%
|
108,961
|
$8,339,874 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.42%
|
104,639
|
$8,009,069 | — | 31 Dec 2025 | |
| Walleye Capital LLC |
13F
|
Company |
0.41%
|
103,935
|
$7,955,185 | — | 31 Dec 2025 | |
| SEI INVESTMENTS CO |
13F
|
Company |
0.41%
|
103,702
|
$7,937,617 | — | 31 Dec 2025 | |
| FIRST WILSHIRE SECURITIES MANAGEMENT INC |
13F
|
Company |
0.4%
|
100,574
|
$7,697,934 | — | 31 Dec 2025 | |
| Numerai GP LLC |
13F
|
Company |
0.39%
|
98,269
|
$7,521,509 | — | 31 Dec 2025 | |
| Point72 Asset Management, L.P. |
13F
|
Company |
0.38%
|
95,775
|
$7,330,619 | — | 31 Dec 2025 | |
| ZWJ INVESTMENT COUNSEL INC |
13F
|
Company |
0.38%
|
94,535
|
$7,235,676 | — | 31 Dec 2025 | |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.35%
|
87,921
|
$6,729,473 | — | 31 Dec 2025 | |
| PUBLIC SECTOR PENSION INVESTMENT BOARD |
13F
|
Company |
0.34%
|
85,714
|
$6,560,550 | — | 31 Dec 2025 | |
| TEACHER RETIREMENT SYSTEM OF TEXAS |
13F
|
Company |
0.34%
|
84,425
|
$6,461,889 | — | 31 Dec 2025 | |
| ProShare Advisors LLC |
13F
|
Company |
0.33%
|
83,739
|
$6,409,383 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for INNOSPEC 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| David Bentley Jones | IOSP | Common Stock | Sale | -6.54% | $77,758 | $75.64 | -1,028 | 14,693 | 03 Mar 2026 | Direct |
| Milton C. Blackmore | IOSP | Common Stock | Sale | -5.34% | $45,473 | $76.55 | -594 | 10,530 | 27 Feb 2026 | Direct |
| Larry Padfield | IOSP | Common Stock | Sale | -5.91% | $45,473 | $76.55 | -594 | 9,453 | 27 Feb 2026 | Direct |
| Claudia Poccia | IOSP | Common Stock | Sale | -1.8% | $9,110 | $76.56 | -119 | 6,508 | 27 Feb 2026 | Direct |
| David Landless | IOSP | Common Stock | Sale | -7.22% | $45,473 | $76.55 | -594 | 7,632 | 27 Feb 2026 | Direct |
| Ian Philip Cleminson | IOSP | Common Stock | Sale | -10.5% | $182,197 | $76.55 | -2,380 | 20,357 | 27 Feb 2026 | Direct |
| Hardy L. Griffin | IOSP | Common Stock | Tax liability | -3.8% | -401 | 10,161 | 27 Feb 2026 | Direct | ||
| David Bentley Jones | IOSP | Common Stock | Tax liability | -5.27% | -875 | 15,721 | 27 Feb 2026 | Direct | ||
| Corbin Barnes | IOSP | Common Stock | Tax liability | -1.25% | -166 | 13,080 | 27 Feb 2026 | Direct | ||
| Patrick Williams | IOSP | Common Stock | Tax liability | -3.33% | -7,966 | 231,535 | 27 Feb 2026 | Direct | ||
| Corbin Barnes | IOSP | Common Stock | Award | 23% | 2,481 | 13,246 | 23 Feb 2026 | Direct | ||
| Hardy L. Griffin | IOSP | Common Stock | Award | 31.4% | 2,521 | 10,562 | 23 Feb 2026 | Direct | ||
| Ian Philip Cleminson | IOSP | Common Stock | Award | 24.7% | 4,499 | 22,737 | 23 Feb 2026 | Direct | ||
| Patrick Williams | IOSP | Common Stock | Award | 9.53% | 20,846 | 239,501 | 23 Feb 2026 | Direct | ||
| David Bentley Jones | IOSP | Common Stock | Award | 22% | 2,993 | 16,596 | 23 Feb 2026 | Direct | ||
| Graeme Blair | IOSP | Phantom Stock | Award | 520 | 520 | 23 Feb 2026 | Direct | |||
| Ian Malcolm McRobbie | IOSP | Phantom Stock | Award | 2,228 | 2,228 | 23 Feb 2026 | Direct | |||
| Elizabeth K. Arnold | IOSP | Common Stock | Award | 31.8% | 1,539 | 6,376 | 23 Feb 2026 | Direct | ||
| Leslie J. Parrette | IOSP | Common Stock | Award | 26.4% | 1,539 | 7,376 | 23 Feb 2026 | Direct | ||
| David Landless | IOSP | Common Stock | Award | 23% | 1,539 | 8,226 | 23 Feb 2026 | Direct | ||
| Claudia Poccia | IOSP | Common Stock | Award | 30.2% | 1,539 | 6,627 | 23 Feb 2026 | Direct | ||
| Milton C. Blackmore | IOSP | Common Stock | Award | 16.1% | 1,539 | 11,124 | 23 Feb 2026 | Direct | ||
| Larry Padfield | IOSP | Common Stock | Award | 18.1% | 1,539 | 10,047 | 23 Feb 2026 | Direct | ||
| Milton C. Blackmore | IOSP | Common Stock | Sale | -9.7% | $84,296 | $81.84 | -1,030 | 9,585 | 20 Feb 2026 | Direct |
| Milton C. Blackmore | IOSP | Common Stock | Options Exercise | 10.8% | 1,030 | 10,615 | 20 Feb 2026 | Direct | ||
| Milton C. Blackmore | IOSP | Stock Option | Options Exercise | -100% | -1,030 | 0 | 20 Feb 2026 | Direct | ||
| Larry Padfield | IOSP | Common Stock | Sale | -10.8% | $84,296 | $81.84 | -1,030 | 8,508 | 20 Feb 2026 | Direct |
| Larry Padfield | IOSP | Common Stock | Options Exercise | 12.1% | 1,030 | 9,538 | 20 Feb 2026 | Direct | ||
| Larry Padfield | IOSP | Stock Option | Options Exercise | -100% | -1,030 | 0 | 20 Feb 2026 | Direct | ||
| Corbin Barnes | IOSP | Common Stock | Award | 19.2% | 1,730 | 10,765 | 16 Feb 2026 | Direct | ||
| Hardy L. Griffin | IOSP | Common Stock | Award | 19.3% | 1,299 | 8,041 | 16 Feb 2026 | Direct | ||
| Ian Philip Cleminson | IOSP | Common Stock | Award | 15% | 2,380 | 18,238 | 16 Feb 2026 | Direct | ||
| Patrick Williams | IOSP | Common Stock | Award | 9.5% | 18,966 | 218,655 | 16 Feb 2026 | Direct | ||
| David Bentley Jones | IOSP | Common Stock | Award | 16.3% | 1,903 | 13,603 | 16 Feb 2026 | Direct | ||
| Corbin Barnes | IOSP | Common Stock | Small acquisition under Rule 16a-6 | 0.22% | 19.87 | 9,035 | 26 Nov 2025 | Direct | ||
| Leslie J. Parrette | IOSP | Common Stock | Purchase | 6.19% | $25,191 | $74.09 | 340 | 5,837 | 14 Nov 2025 | Direct |
| Corbin Barnes | IOSP | Common Stock | Small acquisition under Rule 16a-6 | 0.19% | 16.75 | 9,015 | 30 May 2025 | Direct | ||
| Leslie J. Parrette | IOSP | Common Stock | Sale | -7.5% | $40,421 | $90.63 | -446 | 5,497 | 13 May 2025 | Direct |
| Hardy L. Griffin | IOSP | Common Stock | Tax liability | -8.17% | -600 | 6,742 | 13 May 2025 | Direct | ||
| Corbin Barnes | IOSP | Common Stock | Tax liability | -7.6% | -740 | 8,998 | 13 May 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.