What SEC filings does Innospec Inc. submit to the SEC?

Innospec Inc. (IOSP) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about IOSP?

A Form 4 for IOSP discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Innospec Inc.?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for IOSP?

The 10-K is Innospec Inc.'s annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all IOSP SEC filings directly on EDGAR?

You can view all historical Innospec Inc. filings on the SEC EDGAR company page for IOSP. Each filing card on this page links directly to the original SEC document.

How often does Innospec Inc. file with the SEC?

Innospec Inc. files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling IOSP shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

IOSP SEC Filing News — Innospec Inc.

Latest SEC filings for Innospec Inc. (IOSP) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-10-05.

Innospec Inc. develops, manufactures, blends, markets, and supplies specialty chemicals in the Americas, Europe, the Middle East, Africa, and the Asia-Pacific. The company operates through three segments: Performance Chemicals, Fuel Specialties, and Oilfield Services. It offers specialty chemical products used as additives in diesel, jet, marine, fuel oil, and other fuels used in the operation of commercial trucking, marine and aviation engines, power station generators, heating oil, and other i…

Sector: Basic Materials Industry: Specialty Chemicals Market Cap: $2.4B CIK: 1054905

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for IOSP currently lean bearish. Of the 20 filing records displayed, 6 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 0 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.

IOSP Filing Activity Snapshot 2026-03-03 — 2026-10-05

Insider Transactions (Form 4)

0 buys vs 6 sells

Net insider selling in this period — insiders sell for many reasons beyond conviction.

Largest Form 144 Filing

$182.2K

Cleminson Ian (EVP & CFO) · 2026-03-03

2,380 shares · Form 4

Insider Transactions 14 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 14 filings in this group are Form 4s for Innospec Inc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 14 insider filings shown, the breakdown is 6 compensation award, 6 open-market sale and 2 tax withholding. 6 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Compensation award ×6: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Open-market sale ×6: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Tax withholding ×2: Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Form 4 Compensation award Tax / Compensation Filing 2026-10-05

IOSP insider Form 4 filed for equity award, exercise, or tax withholding

BARNES CORBIN (SVP, Corporate Dev and IR) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Phantom Stock	2,642	—	—

Filing: Form 4 (Insider Transaction) Insider: BARNES CORBIN (SVP, Corporate Dev and IR)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-10-05

IOSP insider Form 4 filed for equity award, exercise, or tax withholding

GRIFFIN HARDY LOUIS III (SVP, HUMAN RESOURCES) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Phantom Stock	2,685	—	—

Filing: Form 4 (Insider Transaction) Insider: GRIFFIN HARDY LOUIS III (SVP, HUMAN RESOURCES)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-10-05

IOSP insider Form 4 filed for equity award, exercise, or tax withholding

Cleminson Ian (EVP & CFO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Phantom Stock	4,792	—	—

Filing: Form 4 (Insider Transaction) Insider: Cleminson Ian (EVP & CFO)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-10-05

IOSP insider Form 4 filed for equity award, exercise, or tax withholding

MCROBBIE IAN MALCOLM (Senior VP R&T) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Phantom Stock	3,164	—	—

Filing: Form 4 (Insider Transaction) Insider: MCROBBIE IAN MALCOLM (Senior VP R&T)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-10-05

IOSP insider Form 4 filed for equity award, exercise, or tax withholding

Jones David B. (SVP, GC & CCO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Phantom Stock	3,188	—	—

Filing: Form 4 (Insider Transaction) Insider: Jones David B. (SVP, GC & CCO)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-10-05

IOSP insider Form 4 filed for equity award, exercise, or tax withholding

Williams Patrick (PRESIDENT & CEO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Phantom Stock	22,203	—	—

Filing: Form 4 (Insider Transaction) Insider: Williams Patrick (PRESIDENT & CEO)

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-03-03

IOSP insider Blackmore Milton C (Director) sold 594 shares (~$45.5K)

Blackmore Milton C, listed as Director at INNOSPEC INC., reported an open-market sale of 594 IOSP shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	594	$76.56	$45.5K

Filing: Form 4 (Insider Transaction) Insider: Blackmore Milton C (Director) Shares: 594 Est. Value: $45.5K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-03-03

IOSP insider PADFIELD Larry (Director) sold 594 shares (~$45.5K)

PADFIELD Larry, listed as Director at INNOSPEC INC., reported an open-market sale of 594 IOSP shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	594	$76.56	$45.5K

Filing: Form 4 (Insider Transaction) Insider: PADFIELD Larry (Director) Shares: 594 Est. Value: $45.5K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-03-03

IOSP insider Poccia Claudia (Director) sold 119 shares (~$9.1K)

Poccia Claudia, listed as Director at INNOSPEC INC., reported an open-market sale of 119 IOSP shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	119	$76.56	$9.1K

Filing: Form 4 (Insider Transaction) Insider: Poccia Claudia (Director) Shares: 119 Est. Value: $9.1K

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-03-03

IOSP insider Form 4 filed for equity award, exercise, or tax withholding

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	401	$78.34	$31.4K

Filing: Form 4 (Insider Transaction) Insider: GRIFFIN HARDY LOUIS III (SVP, HUMAN RESOURCES) Shares: 401

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-03-03

IOSP insider LANDLESS DAVID (Director) sold 594 shares (~$45.5K)

LANDLESS DAVID, listed as Director at INNOSPEC INC., reported an open-market sale of 594 IOSP shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	594	$76.56	$45.5K

Filing: Form 4 (Insider Transaction) Insider: LANDLESS DAVID (Director) Shares: 594 Est. Value: $45.5K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-03-03

IOSP insider Jones David B. (SVP, GC & CCO) sold 1,028 shares (~$77.8K)

Jones David B., listed as SVP, GC & CCO at INNOSPEC INC., reported an open-market sale of 1,028 IOSP shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	875	$78.34	$68.5K
`S`	Open-market sale	1,028	$75.64	$77.8K

Filing: Form 4 (Insider Transaction) Insider: Jones David B. (SVP, GC & CCO) Shares: 1,028 Est. Value: $77.8K

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-03-03

IOSP insider Form 4 filed for equity award, exercise, or tax withholding

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	166	$78.34	$13.0K

Filing: Form 4 (Insider Transaction) Insider: BARNES CORBIN (SVP, Corporate Dev and IR) Shares: 166

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-03-03

IOSP insider Cleminson Ian (EVP & CFO) sold 2,380 shares (~$182.2K)

Cleminson Ian, listed as EVP & CFO at INNOSPEC INC., reported an open-market sale of 2,380 IOSP shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	2,380	$76.56	$182.2K

Filing: Form 4 (Insider Transaction) Insider: Cleminson Ian (EVP & CFO) Shares: 2,380 Est. Value: $182.2K

View on SEC EDGAR → Open Filing Document →

Material Events 4 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 4 in this period for Innospec Inc. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-08-05

IOSP filed 8-K — material company event

INNOSPEC INC. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-06-04

IOSP filed 8-K — material company event

INNOSPEC INC. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-05-13

IOSP filed 8-K — material company event

INNOSPEC INC. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-05-08

IOSP filed 8-K — material company event

INNOSPEC INC. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Periodic Reports 2 · Forms 10-K and 10-Q

The periodic reports are where the audited and reviewed financial statements live. This period contains 2 quarterly reports (10-Q) for Innospec Inc.

The two are not equivalent in weight. A 10-K is audited by an external firm and includes the full risk factor disclosure, business description and management discussion; a 10-Q is unaudited, reviewed rather than examined, and much shorter. When a figure in a quarterly report is later revised, the annual report is usually where the correction appears.

An amended report — 10-K/A or 10-Q/A — restates or corrects something in the original filing, and is worth reading against the version it replaces.

Form 10-Q Quarterly Report 2026-08-05

IOSP filed Quarterly Report (10-Q)

INNOSPEC INC. filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)

View on SEC EDGAR → Open Filing Document →

Form 10-Q Quarterly Report 2026-05-08

IOSP filed Quarterly Report (10-Q)

INNOSPEC INC. filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)

View on SEC EDGAR → Open Filing Document →

How we classify Innospec Inc.'s filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on IOSP. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — IOSP SEC Filings

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IOSP Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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