EXHIBIT 99.1

PRESS RELEASE

INNOSPEC REPORTS FOURTH QUARTER AND FULL YEAR 2016 FINANCIAL RESULTS

Strong end to the year – GAAP EPS of $0.90 and adjusted non-GAAP EPS of $1.09

All businesses performed as anticipated – very well positioned for 2017

Acquisition of Huntsman business successfully completed – portfolio now well balanced

Continued strong cash generation – balance sheet in great shape

Englewood, CO – February 14, 2017 – Innospec Inc. (NASDAQ: IOSP) today announced its financial results for the fourth quarter and full year ended December 31, 2016.

Total net sales for the fourth quarter were $237.8 million, a 3 percent decrease from $246.0 million in the corresponding period last year.

Net income for the quarter was $22.1 million, or $0.90 per diluted share, compared with $31.5 million, or $1.28 per diluted share, a year ago. Adjusted EBITDA (earnings before interest, taxes, depreciation, amortization and fair value adjustments) for the quarter was $36.3 million compared to $39.8 million a year ago.

Results for this quarter include some special items, which are summarized in the table below. Excluding these items, adjusted non-GAAP EPS (earnings per share) in the fourth quarter was $1.09 per diluted share, compared to $1.24 per diluted share a year ago. Innospec closed the quarter with net debt of $171.4 million. The Company paid a semi-annual dividend of $0.34 per common share and completed the acquisition of the Huntsman business for approximately $200 million in the quarter.

Innospec continued to generate cash and, during the quarter operating cash inflows were $17.7 million before capital expenditures of $4.3 million.

Adjusted EBITDA and net income excluding special items, and related per-share amounts, are non-GAAP financial measures that are defined and reconciled with GAAP results herein and in the schedules below.

Commenting on the results, Patrick S. Williams, President and Chief Executive Officer, said,

“Innospec has ended the year as we expected with a strong quarter, with all of our strategic businesses delivering at or above expectations. Excluding Octane Additives, sales were up 4 percent on the same quarter last year. Margins remain strong with good cost control, helping us deliver an excellent underlying adjusted EPS of $1.09 for the quarter.”

“Fuel Specialties delivered volume growth of 1 percent, although we saw some adverse impacts from price/mix and foreign exchange. Market conditions continue to be tough in some regions, but margins remain above expectations, with a strong contribution from our aviation gasoline products in the quarter. We have seen additional customer wins in all regions, making us feel confident entering 2017.”

“Performance Chemicals continued its excellent track record of technology-driven growth. Increased sales of established products were augmented by further new product launches in all regions. We also successfully completed the acquisition of the Huntsman business on December 30, 2016. The integration is proceeding to plan and importantly, customer reaction has been very positive.”

“As we expected, Oilfield Services continued its recovery as we delivered our fourth successive quarter of sequential improvement with the business returning to profit. The improvement and relative stability of crude oil and natural gas prices is underpinning our customers’ investment programs, and activity levels have shown a marked increase. There is still a long way to go to get back to 2014-2015 levels, but customer confidence is better than it has been for some time.”

“As anticipated, Octane Additives had a quiet quarter, although we do expect new orders starting again late in the first quarter or early in the second quarter of 2017.”

For the full year, total revenues of $883.4 million decreased 13 percent from $1.0 billion in 2015. Net income for 2016 was $81.3 million, or $3.33 per diluted share, compared to $119.5 million, or $4.86 per diluted share, a year ago. Adjusted EBITDA for the year was $134.6 million, down 12 percent from $153.3 million in 2015. Special items decreased net income for the full year by $11.8 million, or $0.47 per diluted share; in 2015, similar items increased net income by $12.4 million, or $0.50 per diluted share.

Net sales in Fuel Specialties for the quarter were $142.5 million, a 3 percent decrease from $146.2 million in last year’s fourth quarter. Volumes were up by 1 percent, with an adverse price and product mix of 3 percent, and a 1 percent negative currency impact. A continued strong performance in EMEA was offset by a slightly softer sales quarter in both the Americas and Asia Pacific. Sales into aviation were very strong in the quarter, driven by order patterns. Overall, the segment’s gross margin for the quarter was 39.9 percent, up 5.3 percentage points from 34.6 percent in last year’s fourth quarter, and operating income was $38.4 million. For the full year, the segment’s sales were down 4 percent to $509.6 million and operating income was up 8 percent at $110.6 million.

In Performance Chemicals, revenues for the quarter were $31.9 million, up 4 percent from $30.6 million last year. Strong volume growth of 11 percent was partially offset by an adverse currency impact of 7 percent. By region, sales in EMEA and Asia Pacific grew by 15 percent while the Americas were broadly flat. The segment’s gross margin for the quarter was 28.2 percent down due to the sales mix in the quarter. Operating income for the quarter was $2.7 million. Excluding the divestment of Aroma Chemicals in 2015, full year sales of $138.7 million were up 7 percent and operating income of $16.0 million increased by 28 percent from last year.

Sales in Oilfield Services for the quarter were $59.3 million, up 22 percent on the fourth quarter of 2015, driven by increased customer activity. Volume growth of 53 percent was offset by a price and mix reduction of 31 percent. Gross margins remained steady and strong at 41.0 percent. The Oilfield Services business returned an operating income of $2.4 million for the quarter, compared to a loss of $4.8 million in the same quarter last year. For the full year, sales were $191.7 million down from $265.0 million a year ago and there was an operating loss of $4.7 million compared to an operating income of $9.0 million in 2015.

Octane Additives’ net sales for 2016’s fourth quarter were $4.1 million, compared to $20.5 million a year ago. Gross margin for the quarter was 29.3 percent, and the segment’s operating income was $0.2 million, compared to last year’s $8.8 million. For the year, Octane Additives’ net sales were $43.4 million a 27 percent decrease, and its operating income was $22.7 million, an 8 percent decrease from a year ago.

Corporate costs for the quarter were $16.1 million, up from $13.5 million a year ago driven primarily by acquisition costs and increased share-based and LTIP compensation. The effective tax rate for the quarter was 23.8 percent and, as we expected, the full year effective tax rate of 21.1 percent was slightly lower than last year’s 21.5 percent.

For the full year, net cash generated from operations was $104.5 million, compared to $117.7 million during 2015. At year-end, Innospec had $101.9 million in cash and cash equivalents and total debt of $273.3 million, resulting in net debt of $171.4 million.

Mr. Williams concluded,

“I’m delighted to report that Innospec has ended the year with great momentum as we expected. These improvements are across the board in all three of our strategic businesses. With solid margins and continued cost control, we continue to deliver good earnings per share.”

“We have closed the acquisition from Huntsman which balances our portfolio, and we believe our business enters 2017 in good shape to build on the fourth quarter’s momentum. Our excellent cash generation has also meant that our leverage is slightly better than we predicted.”

“While there are challenges ahead next year, the strong end to 2016 means that we feel cautiously optimistic about 2017. Our strategy continues to deliver to expectations, and we remain open to additional acquisitions that can further enhance our portfolio without over-stressing our balance sheet.”

Use of Non-GAAP Financial Measures

The information presented in this press release includes financial measures that are not calculated or presented in accordance with Generally Accepted Accounting Principles in the United States (GAAP). These non-GAAP financial measures comprise adjusted EBITDA, income before income taxes excluding special items and net income excluding special items and related per share amounts. Adjusted EBITDA is net income per our consolidated financial statements adjusted for the exclusion of charges for interest expense, net, income taxes, depreciation, amortization and acquisition fair value adjustments. Income before income taxes, net income and diluted EPS, excluding special items, per our consolidated financial statements are adjusted for the exclusion of amortization of acquired intangible assets, adjustment to fair value of contingent consideration, acquisition-related costs, adjustment of income tax provisions, loss/(profit) on disposal of subsidiary, settlement of distributor claim, foreign currency exchange losses/(gains) and fair value acquisition accounting. Reconciliations of these non-GAAP financial measures to their most directly comparable GAAP financial measures are provided herein and in the schedules below. The Company believes that such non-GAAP financial measures provide useful information to investors and may assist them in evaluating the Company’s underlying performance and identifying operating trends. In addition, these non-GAAP measures address questions the Company routinely receives from analysts and investors and the Company has determined that it is appropriate to make this data available to all investors. While the Company believes that such measures are useful in evaluating the Company’s performance, investors should not consider them to be a substitute for financial measures prepared in accordance with GAAP. In addition, these non-GAAP financial measures may differ from similarly-titled non-GAAP financial measures used by other companies and do not provide a comparable view of the Company’s performance relative to other companies in similar industries. Management uses adjusted EPS (the most directly comparable GAAP financial measure for which is GAAP EPS) and adjusted net income and adjusted EBITDA (the most directly comparable GAAP financial measure for which is GAAP net income) to allocate resources and evaluate the performance of the Company’s operations. Management believes the most directly comparable GAAP financial measure is GAAP net income and has provided a reconciliation of adjusted EBITDA and net income excluding special items, and related per share amounts, to GAAP net income herein and in the schedules below.

About Innospec Inc.

Innospec Inc. is an international specialty chemicals company with approximately 1800 employees in 23 countries. Innospec manufactures and supplies a wide range of specialty chemicals to markets in the Americas, Europe, the Middle East, Africa and Asia-Pacific. The Fuel Specialties business specializes in manufacturing and supplying fuel additives that improve fuel efficiency, boost engine performance and reduce harmful emissions. Oilfield Services provides specialty chemicals to all elements of the oil & gas exploration and production industry. The Performance Chemicals business creates innovative technology-based solutions for our customers in the Personal Care, Home Care, Agrochemical, Mining and Industrial markets. Octane Additives produces octane improvers to enhance gasoline.

Forward-Looking Statements

This press release contains certain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. All statements other than statements of historical facts included or incorporated herein may constitute forward-looking statements. Such forward-looking statements include statements (covered by words like “expects,” “estimates,” “anticipates,” “may,” “believes,” “feels” or similar words or expressions), for example, which relate to earnings, growth potential, operating performance, events or developments that we expect or anticipate will or may occur in the future. Although forward-looking statements are believed by management to be reasonable when made, they are subject to certain risks, uncertainties and assumptions, and our actual performance or results may differ materially from these forward-looking statements. Additional information regarding risks, uncertainties and assumptions relating to Innospec and affecting our business operations and prospects are described in Innospec’s Annual Report on Form 10-K for the year ended December 31, 2015, Innospec’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016 and other reports filed with the U.S. Securities and Exchange Commission. You are urged to review our discussion of risks and uncertainties that could cause actual results to differ from forward-looking statements under the heading “Risk Factors” in such reports. Innospec undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Contacts:

Brian Watt

Innospec Inc.

+44-151-355-3611

Brian.Watt@innospecinc.com

Schedule 1

INNOSPEC INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

INNOSPEC INC. AND SUBSIDIARIES

Schedule 2A

Schedule 2B

Adjusted EBITDA by segment includes operating income relating to the segments, excluding depreciation and amortization. In addition, it also excludes the fair value acquisition accounting relating to Oilfield Services.

Schedule 3

INNOSPEC INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

Schedule 4

INNOSPEC INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

Amortization of deferred finance costs of $0.4 million (2015 - $1.2 million) are included in depreciation and amortization in the cash flow statement but in interest expense in the income statement.