All businesses contributed to revenue and operating income growth

Englewood, CO – November 3, 2026 — Innospec Inc. (NASDAQ: IOSP) today announced its financial results for the third quarter ended September 30, 2026 and declared a semi-annual dividend of 94 cents per common share for the second half of 2026, which will be paid on November 25, 2026 to shareholders of record as of November 17, 2026. This brings the annual dividend to $1.86 per share, a 9 percent increase over 2025.

Total revenues for the third quarter were $473.6 million, an increase of 7 percent from $441.9 million in the corresponding period last year. Net income attributable to Innospec for the quarter was $31.8 million or $1.29 per diluted share, compared to $12.9 million or 52 cents per diluted share recorded last year.

Adjusted EBITDA for the quarter was $51.4 million compared to $44.2 million reported in the same period a year ago. Innospec generated cash from operating activities of $17.4 million, before capital expenditures of $15.6 million in the quarter. The quarter closed with net cash of $251.9 million.

Results for this quarter include some special items, which are summarized in the table below. Excluding these items, adjusted non-GAAP EPS in the third quarter was $1.29 per diluted share, compared to $1.12 per diluted share a year ago.

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

		Quarter ended September 30, 2026				Quarter ended September 30, 2025
(in millions, except share and per share data)		Net income attributable to Innospec		Diluted EPS			Net income attributable to Innospec		Diluted EPS
Reported GAAP amounts	$	31.8	$	1.29	$		12.9	$	0.52
Adjustment to fair value of contingent consideration		(1.1)		(0.04)			(17.7)		(0.71)
Amortization of acquired intangible assets		0.8		0.03			1.7		0.07
Legacy costs of closed operations		0.7		0.03			0.8		0.03
Foreign currency exchange gains		(0.4)		(0.02)			(2.4)		(0.10)
Impairment of property, plant and equipment		-		-			18.1		0.73
Impairment of intangible assets		-		-			14.0		0.56
Restructuring charge		-		-			0.6		0.02

		0.0		0.0		15.1		0.60
Adjusted non-GAAP amounts	$	31.8	$	1.29	$	28.0	$	1.12

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

“This was another good quarter for Innospec with all businesses contributing to solid revenue and strong operating income growth.

Performance Chemicals sales growth and margin improvement drove an 84 percent operating income increase over last year. In North Carolina, we expect to commission our recent plant efficiency upgrades by year-end. These upgrades are expected to increase capacity, productivity and yields on a wide range of personal care and other products. As utilization of this new capacity improves and progress on new products continues, we expect further growth and margin improvement in the coming quarters.

Fuel Specialties had another strong quarter delivering revenue growth and steady operating income with margins that remained within our target range. As expected, the business has continued to deliver consistent results.

Oilfield Services operating income grew 40 percent and operating margins improved, driven by our recent DRA plant expansion. While sequential results were lower than expected on continued activity delays in our legacy Middle East business and elevated raw material costs, we are expecting improvement across several of these areas to drive sequential operating income growth in the fourth quarter.”

Revenues in Performance Chemicals of $180.5 million were up 6 percent from $170.8 million in the third quarter of last year. Volume reductions of 5 percent and a negative currency impact of 1 percent were offset by a positive price and product mix of 12 percent. Gross margins of 18.8 percent increased by 3.7 percentage points from the same quarter last year. Operating income of $16.9 million increased 84 percent from $9.2 million in the prior year period.

Revenues in Fuel Specialties of $180.7 million were up 5 percent from $172.0 million in the third quarter of last year. Volumes were up 3 percent and the price and product mix up 2 percent. Gross margins of 35.1 percent decreased by 0.5 percentage points over last year. Operating income of $35.6 million was up 1 percent from $35.3 million a year ago.

Revenues in Oilfield Services of $112.4 million for the quarter were up 13 percent from $99.1 million in the third quarter of last year. Gross margins of 28.2 percent decreased by 1.8 percentage points from the same quarter last year on a weaker sales mix. Operating income of $6.7 million increased 40 percent from $4.8 million in the prior year period.

Corporate costs for the quarter were $18.6 million, compared with $18.2 million a year ago. The adjusted effective tax rate for the quarter was 24.7 percent compared to 22.7 percent in the same period last year, due to the geographical mix of taxable profits.

For the quarter, cash provided by operating activities was $17.4 million compared to $39.1 million a year ago. As of September 30, 2026, Innospec had $251.9 million in cash and cash equivalents and no debt.

Mr. Williams concluded,

“Again this quarter Innospec delivered solid sales and strong operating income growth with higher margins. We remain focused on significant opportunities for continued growth and margin improvement across all our businesses and in particular Performance Chemicals and Oilfield Services.

Operating cash generation was positive in the quarter, and our net cash position remained at over $250 million. We continue to focus on driving increased operating cash flow in the coming quarters with better working capital efficiency. We have significant balance sheet flexibility for organic investment, M&A, dividend growth, and buybacks. This quarter our Board approved a further increase in our semi-annual dividend to 94 cents per share resulting in an annual dividend increase of 9 percent.”

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, net income attributable to Innospec excluding special items and related per share amounts together with net cash. Adjusted EBITDA is net income attributable to Innospec per our consolidated financial statements adjusted for the exclusion of interest income, net, income taxes, depreciation and amortization, foreign currency exchange (gains)/losses, legacy costs of closed operations, adjustment to fair value of contingent consideration, restructuring charge, impairment of property, plant and equipment and impairment of intangible assets. Net income attributable to Innospec and diluted EPS, excluding special items, per our consolidated financial statements are adjusted for the exclusion of adjustment to fair value of contingent consideration, amortization of acquired intangible assets, legacy costs of closed operations, foreign currency exchange gains, impairment of property, plant and equipment, impairment of intangible assets and restructuring charge. Net cash is cash and cash equivalents less total debt. 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 net income attributable to Innospec excluding special items and adjusted EBITDA (the most directly comparable GAAP financial measure for which is GAAP net income attributable to Innospec) to allocate resources and evaluate the performance of the Company’s operations and has provided a reconciliation of adjusted EBITDA and net income attributable to Innospec excluding special items, and related per share amounts, to GAAP net income attributable to Innospec herein and in the schedules below.

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,” “could,” “believes,” “feels,” “plans,” “intends,” “outlook” 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, 2025, Innospec’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2026 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:

Corbin Barnes

Innospec Inc.

+44-151-355-3611

[email protected]

INNOSPEC INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

Schedule 1

(in millions, except share and per share data)		Three Months Ended       September 30					Nine Months Ended September 30
		2026		2025			2026		2025
Net sales	$	473.6	$	441.9	$		1,418.2	$	1,322.4
Cost of goods sold		(344.5)		(325.2)			(1,027.3)		(957.4)
Gross profit		129.1		116.7			390.9		365.0
Operating expenses:
Selling, general and administrative		(71.7)		(71.9)			(234.5)		(215.8)
Research and development		(16.8)		(13.7)			(44.2)		(40.0)
Adjustment to fair value of contingent consideration		1.1		17.7			5.7		16.2
Restructuring charge		-		(0.9)			-		(0.9)
Impairment of property, plant and equipment		-		(22.9)			-		(22.9)
Impairment of intangible assets		-		(19.1)			-		(19.1)
Profit on disposal of property, plant and equipment		-		-			-		0.2
Total operating expenses		(87.4)		(110.8)			(273.0)		(282.3)
Operating income		41.7		5.9			117.9		82.7
Other income/(expense), net		0.5		3.2			4.2		(1.2)
Interest income, net		0.4		2.2			2.0		7.3
Income before income taxes		42.6		11.3			124.1		88.8
Income taxes		(11.0)		1.4			(30.5)		(18.6)
Net income		31.6		12.7			93.6		70.2
Net loss/(income) attributable to non-controlling interests		0.2		0.2			(0.6)		(1.0)
Net income attributable to Innospec	$	31.8	$	12.9	$		93.0	$	69.2
Earnings per share:
Basic	$	1.29	$	0.52	$		3.77	$	2.78
Diluted	$	1.29	$	0.52	$		3.75	$	2.76
Weighted average shares outstanding (in thousands):
Basic		24,631		24,834			24,684		24,914
Diluted		24,743		24,909			24,802		25,045

INNOSPEC INC. AND SUBSIDIARIES

Schedule 2A

SEGMENTAL ANALYSIS OF RESULTS		Three Months Ended September 30				Nine Months Ended September 30
(in millions)		2026		2025		2026		2025
Net sales:
Performance Chemicals	$	180.5	$	170.8	$	540.2	$	513.0
Fuel Specialties		180.7		172.0		548.0		507.4
Oilfield Services		112.4		99.1		330.0		302.0
		473.6		441.9		1,418.2		1,322.4
Gross profit:
Performance Chemicals		34.0		25.8		95.4		91.6
Fuel Specialties		63.4		61.2		195.7		184.9
Oilfield Services		31.7		29.7		99.8		88.5
		129.1		116.7		390.9		365.0
Operating income:
Performance Chemicals		16.9		9.2		44.0		43.3
Fuel Specialties		35.6		35.3		109.7		107.6
Oilfield Services		6.7		4.8		21.0		15.1
Corporate costs		(18.6)		(18.2)		(62.5)		(56.8)
		40.6		31.1		112.2		109.2
Adjustment to fair value of contingent consideration		1.1		17.7		5.7		16.2
Restructuring charge		-		(0.9)		-		(0.9)
Impairment of property, plant and equipment		-		(22.9)		-		(22.9)
Impairment of intangible assets		-		(19.1)		-		(19.1)
Profit on disposal of property, plant and equipment		-		-		-		0.2
Total operating income	$	41.7	$	5.9	$	117.9	$	82.7

Schedule 2B

NON-GAAP MEASURES		Three Months Ended September 30				Nine Months Ended September 30
(in millions)		2026		2025		2026		2025
Net income attributable to Innospec	$	31.8	$	12.9	$	93.0	$	69.2
Interest income, net		(0.4)		(2.2)		(2.0)		(7.3)
Income taxes		11.0		(1.4)		30.5		18.6
Depreciation and amortization		9.7		11.9		29.5		34.2
Foreign currency exchange (gains)/losses		(0.5)		(3.2)		(4.2)		1.1
Legacy costs of closed operations		0.9		1.0		4.1		4.8
Adjustment to fair value of contingent consideration		(1.1)		(17.7)		(5.7)		(16.2)
Restructuring charge		-		0.9		-		0.9
Impairment of property, plant and equipment		-		22.9		-		22.9
Impairment of intangible assets		-		19.1		-		19.1
Adjusted EBITDA		51.4		44.2		145.2		147.3

Schedule 3

INNOSPEC INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in millions)		September 30, 2026		December 31, 2025
Assets
Current assets:
Cash and cash equivalents	$	251.9	$	292.5
Trade and other accounts receivable		395.6		342.3
Inventories		361.8		329.3
Prepaid expenses		10.0		20.1
Prepaid income taxes		2.7		13.1
Other current assets		12.4		7.3
Total current assets		1,034.4		1,004.6
Net property, plant and equipment		300.2		286.1
Operating lease right-of-use assets		47.3		52.7
Goodwill		397.4		399.0
Other intangible assets		62.5		67.7
Deferred tax assets		13.5		13.6
Other non-current assets		1.3		8.7
Total assets	$	1,856.6	$	1,832.4
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable	$	164.4	$	174.7
Accrued liabilities		157.5		152.3
Current portion of operating lease liabilities		13.5		15.9
Current portion of plant closure provisions		4.9		4.9
Current portion of acquisition-related contingent consideration		2.5		7.0
Accrued income taxes		8.4		5.3
Total current liabilities		351.2		360.1
Operating lease liabilities, net of current portion		33.8		36.8
Plant closure provisions, net of current portion		58.8		60.2
Deferred tax liabilities		15.8		19.1
Pension liabilities and post-employment benefits		12.5		13.2
Acquisition-related contingent consideration, net of current portion		0.5		1.3
Other non-current liabilities		3.7		8.8
Equity		1,380.3		1,332.9
Total liabilities and equity	$	1,856.6	$	1,832.4

Schedule 4

INNOSPEC INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

		Nine Months Ended September 30
(in millions)		2026		2025
Cash Flows from Operating Activities
Net income	$	93.6	$	70.2
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization		29.5		34.2
Adjustment to fair value of contingent consideration		(5.7)		(14.9)
Impairment of property, plant and equipment		-		22.9
Impairment of intangible assets		-		19.1
Deferred taxes		(3.0)		(10.6)
Profit on disposal of property, plant and equipment		-		(0.2)
Movements on defined benefit pension plans		(0.2)		2.6
Stock option compensation		5.2		5.0
Changes in working capital		(87.4)		(24.4)
Movements in plant closure provisions		0.5		1.1
Movements in income taxes		11.8		(19.9)
Movements in other assets and liabilities		(2.1)		(7.2)
Net cash provided by operating activities		42.2		77.9
Cash Flows from Investing Activities
Capital expenditures		(42.4)		(35.7)
Proceeds on disposal of property, plant and equipment		1.7		0.4
Business combinations, net of cash acquired		-		(2.0)
Internally developed software		(5.1)		(18.6)
Net cash used in investing activities		(45.8)		(55.9)
Cash Flows from Financing Activities
Dividend paid		(22.7)		(20.8)
Issue of treasury stock		0.2		0.4
Repurchase of common stock		(13.5)		(23.9)
Net cash used in financing activities		(36.0)		(44.3)
Effect of foreign currency exchange rate changes on cash		(1.0)		3.9
Net change in cash and cash equivalents		(40.6)		(18.4)
Cash and cash equivalents at beginning of period		292.5		289.2
Cash and cash equivalents at end of period	$	251.9	$	270.8