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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Pay vs Performance Disclosure, Table |  | PAY VERSUS PERFORMANCE As required by Item 402(v) of Regulation S-K, we are providing the following information about the relationship between compensation actually paid (CAP), as defined in Item 402(v), and performance.
Year (a) | Summary Compensation Table Total for Principal Executive Officer (PEO) (b)1 | Compensation Actually Paid to PEO2,3 (c) | Average Summary Compensation Table Total for Non-PEO Named Executive Officers1 (d) | Average Compensation Actually Paid to Non-PEO NEOs2,3 (e) | Value of Initial Fixed $100 Investment Based On: | Net Income (millions)5 (h) | Corporate Operating Income6 (millions) (i)
Total Shareholder Return (f) | Peer Group Total Shareholder Return4 (g)
2024 | $13,216,384 | $11,169,734 | $2,282,244 | $2,148,332 | $113 | $126 | $35.6 | $209.4
2023 | $7,299,862 | $10,144,030 | $1,253,550 | $1,604,203 | $125 | $128 | $139.1 | $182.1
2022 | $7,888,489 | $11,227,698 | $1,375,137 | $1,771,361 | $103 | $112 | $133.0 | $213.3
2021 | $9,897,900 | $6,603,590 | $1,668,578 | $1,305,876 | $90 | $149 | $93.1 | $131.2
2020 | $7,454,445 | $5,431,868 | $1,465,583 | $1,135,176 | $89 | $116 | $28.7 | $63.2
(1) |  | The PEO listed for 2020, 2021, 2022, 2023, and 2024 is Patrick S. Williams. The Non-PEO remaining NEOs for 2023 and 2024 are Ian P. Cleminson, Philip J. Boon, Corbin Barnes, and David B. Jones. The Non-PEO remaining NEOs for 2021 and 2022 are Ian P. Cleminson, Philip J. Boon, Ian M. McRobbie, and David B. Jones. The Non-PEO remaining NEOs for 2020 are Ian P. Cleminson, Philip J. Boon, Brian R. Watt, and Ian M. McRobbie.
(2) |  | The following adjustments relating to equity awards were made to total compensation for each year to determine CAP:
(3) |  | For 2024, no adjustments were made relating to defined benefit and pension plans to determine CAP.
(4) |  | Represents the cumulative TSR for the S&P Composite 1500 Specialty Chemicals Index, as disclosed by Innospec for the purposes of Item 201(e) of Regulation S-K.
(5) |  | The dollar amounts reported represent the amount of net income reflected in the Company’s audited financial statements for the applicable year (GAAP Net Income).
(6) |  | Corporate Operating Income is the financial performance measure used by the Company in the most recently completed fiscal year to link CAP to the Company’s performance. Corporate Operating Income is calculated from GAAP Operating Income adjusted to exclude certain one-time/nonrecurring costs that are not reflective of the Company’s underlying operations, as further described in the Compensation Discussion and Analysis.
(1)The PEO listed for 2020, 2021, 2022, 2023, and 2024 is Patrick S. Williams. The Non-PEO remaining NEOs for 2023 and 2024 are Ian P. Cleminson, Philip J. Boon, Corbin Barnes, and David B. Jones. The Non-PEO remaining NEOs for 2021 and 2022 are Ian P. Cleminson, Philip J. Boon, Ian M. McRobbie, and David B. Jones. The Non-PEO remaining NEOs for 2020 are Ian P. Cleminson, Philip J. Boon, Brian R. Watt, and Ian M. McRobbie. (2)The following adjustments relating to equity awards were made to total compensation for each year to determine CAP:
Year | Value of Equity Awards Disclosed in the Summary Compensation Table | Year End Value of Equity Awards Granted During the Covered Year | Change in Fair Value from Prior Year End Fair Value of Outstanding and Unvested Equity Awards | Change in Fair Value from Prior Year End Fair Value of Awards Granted in Prior Years Vesting During the Covered Year | Total Equity Award Adjustments
2024 PEO | ($5,332,447) | $4,716,328 | ($1,392,038) | ($38,493) | ($2,046,650)
2024 Average Non-PEO NEOs | ($565,834) | $617,831 | ($180,651) | ($5,258) | ($133,912)
(a)The valuation methodologies used to calculate fair values for each measurement date do not materially differ from those used at the time of grant of each respective award. (1)For 2024, no adjustments were made relating to defined benefit and pension plans to determine CAP. (2)Represents the cumulative TSR for the S&P Composite 1500 Specialty Chemicals Index, as disclosed by Innospec for the purposes of Item 201(e) of Regulation S-K. (3)The dollar amounts reported represent the amount of net income reflected in the Company’s audited financial statements for the applicable year (GAAP Net Income). (4)Corporate Operating Income is the financial performance measure used by the Company in the most recently completed fiscal year to link CAP to the Company’s performance. Corporate Operating Income is calculated from GAAP Operating Income adjusted to exclude certain one-time/nonrecurring costs that are not reflective of the Company’s underlying operations, as further described in the Compensation Discussion and Analysis. |  |  |  |
Company Selected Measure Name |  | Corporate Operating Income |  |  |  |
Named Executive Officers, Footnote [Text Block] |  | (1)The PEO listed for 2020, 2021, 2022, 2023, and 2024 is Patrick S. Williams. The Non-PEO remaining NEOs for 2023 and 2024 are Ian P. Cleminson, Philip J. Boon, Corbin Barnes, and David B. Jones. The Non-PEO remaining NEOs for 2021 and 2022 are Ian P. Cleminson, Philip J. Boon, Ian M. McRobbie, and David B. Jones. The Non-PEO remaining NEOs for 2020 are Ian P. Cleminson, Philip J. Boon, Brian R. Watt, and Ian M. McRobbie. |  |  |  |
PEO Total Compensation Amount | [1] | $ 13,216,384 | $ 7,299,862 | $ 7,888,489 | $ 9,897,900 | $ 7,454,445
PEO Actually Paid Compensation Amount | [2],[3] | $ 11,169,734 | 10,144,030 | 11,227,698 | 6,603,590 | 5,431,868
Adjustment To PEO Compensation, Footnote |  |
Year | Value of Equity Awards Disclosed in the Summary Compensation Table | Year End Value of Equity Awards Granted During the Covered Year | Change in Fair Value from Prior Year End Fair Value of Outstanding and Unvested Equity Awards | Change in Fair Value from Prior Year End Fair Value of Awards Granted in Prior Years Vesting During the Covered Year | Total Equity Award Adjustments
2024 PEO | ($5,332,447) | $4,716,328 | ($1,392,038) | ($38,493) | ($2,046,650)
2024 Average Non-PEO NEOs | ($565,834) | $617,831 | ($180,651) | ($5,258) | ($133,912)
(a)The valuation methodologies used to calculate fair values for each measurement date do not materially differ from those used at the time of grant of each respective award. |  |  |  |
Non-PEO NEO Average Total Compensation Amount | [1] | $ 2,282,244 | 1,253,550 | 1,375,137 | 1,668,578 | 1,465,583
Non-PEO NEO Average Compensation Actually Paid Amount | [2],[3] | $ 2,148,332 | 1,604,203 | 1,771,361 | 1,305,876 | 1,135,176
Adjustment to Non-PEO NEO Compensation Footnote |  |
Year | Value of Equity Awards Disclosed in the Summary Compensation Table | Year End Value of Equity Awards Granted During the Covered Year | Change in Fair Value from Prior Year End Fair Value of Outstanding and Unvested Equity Awards | Change in Fair Value from Prior Year End Fair Value of Awards Granted in Prior Years Vesting During the Covered Year | Total Equity Award Adjustments
2024 PEO | ($5,332,447) | $4,716,328 | ($1,392,038) | ($38,493) | ($2,046,650)
2024 Average Non-PEO NEOs | ($565,834) | $617,831 | ($180,651) | ($5,258) | ($133,912)
(a)The valuation methodologies used to calculate fair values for each measurement date do not materially differ from those used at the time of grant of each respective award. |  |  |  |
Compensation Actually Paid vs. Total Shareholder Return |  | The graphics below depict the relationship between CAP and Company TSR, S&P Composite 1500 Specialty Chemicals Index TSR (referred to as the “peer group TSR” for purposes of 402(v)), and financial performance. |  |  |  |
Compensation Actually Paid vs. Net Income |  | The graphics below depict the relationship between CAP and Company TSR, S&P Composite 1500 Specialty Chemicals Index TSR (referred to as the “peer group TSR” for purposes of 402(v)), and financial performance. |  |  |  |
Total Shareholder Return Vs Peer Group |  | The graphics below depict the relationship between CAP and Company TSR, S&P Composite 1500 Specialty Chemicals Index TSR (referred to as the “peer group TSR” for purposes of 402(v)), and financial performance. |  |  |  |
Tabular List, Table |  | Tabular List of Financial Performance Measures The most important financial performance measures used by the Company to link executive CAP to the Company’s PEO and NEOs, for the most recently completed fiscal year, to the Company’s performance are as follows: •Corporate Operating Income •EPS •Cash Flow •Revenue •Relative TSR |  |  |  |
Total Shareholder Return Amount |  | $ 113 | 125 | 103 | 90 | 89
Peer Group Total Shareholder Return Amount | [4] | 126 | 128 | 112 | 149 | 116
Net Income (Loss) Attributable to Parent | [5] | $ 35,600,000 | $ 139,100,000 | $ 133,000,000.0 | $ 93,100,000 | $ 28,700,000
Company Selected Measure Amount | [6] | 209,400,000 | 182,100,000 | 213,300,000 | 131,200,000 | 63,200,000
PEO Name |  | Patrick S. Williams | Patrick S. Williams | Patrick S. Williams | Patrick S. Williams | Patrick S. Williams
Measure [Axis]: 1 |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Measure Name |  | Corporate Operating Income |  |  |  |
Measure [Axis]: 2 |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Measure Name |  | EPS |  |  |  |
Measure [Axis]: 3 |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Measure Name |  | Cash Flow |  |  |  |
Measure [Axis]: 4 |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Measure Name |  | Revenue |  |  |  |
Measure [Axis]: 5 |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Measure Name |  | Relative TSR |  |  |  |
PEO [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | $ (5,332,447) |  |  |  |
PEO [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | 4,716,328 |  |  |  |
PEO [Member] | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | (1,392,038) |  |  |  |
PEO [Member] | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | (38,493) |  |  |  |
PEO [Member] | Equity Awards Adjustments [Member] |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | (2,046,650) |  |  |  |
Non-PEO NEO [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | (565,834) |  |  |  |
Non-PEO NEO [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | 617,831 |  |  |  |
Non-PEO NEO [Member] | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | (180,651) |  |  |  |
Non-PEO NEO [Member] | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | (5,258) |  |  |  |
Non-PEO NEO [Member] | Equity Awards Adjustments [Member] |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |
Adjustment to Compensation Amount |  | $ (133,912) |  |  |  |
[1] | The PEO listed for 2020, 2021, 2022, 2023, and 2024 is Patrick S. Williams. The Non-PEO remaining NEOs for 2023 and 2024 are Ian P. Cleminson, Philip J. Boon, Corbin Barnes, and David B. Jones. The Non-PEO remaining NEOs for 2021 and 2022 are Ian P. Cleminson, Philip J. Boon, Ian M. McRobbie, and David B. Jones. The Non-PEO remaining NEOs for 2020 are Ian P. Cleminson, Philip J. Boon, Brian R. Watt, and Ian M. McRobbie.
[2] | For 2024, no adjustments were made relating to defined benefit and pension plans to determine CAP.
[3] | The following adjustments relating to equity awards were made to total compensation for each year to determine CAP:
[4] | Represents the cumulative TSR for the S&P Composite 1500 Specialty Chemicals Index, as disclosed by Innospec for the purposes of Item 201(e) of Regulation S-K.
[5] | The dollar amounts reported represent the amount of net income reflected in the Company’s audited financial statements for the applicable year (GAAP Net Income).
[6] | Corporate Operating Income is the financial performance measure used by the Company in the most recently completed fiscal year to link CAP to the Company’s performance. Corporate Operating Income is calculated from GAAP Operating Income adjusted to exclude certain one-time/nonrecurring costs that are not reflective of the Company’s underlying operations, as further described in the Compensation Discussion and Analysis.

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