v3.26.1
Pay vs Performance Disclosure - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Pay vs Performance Disclosure          
Pay vs Performance Disclosure, Table

Summary

Average

Value of Initial Fixed

 

Compensation

Summary

Average

$100 Investment

 

Table Total for

Compensation

Compensation

Based On:

Adjusted

 

Principal

Table Total for

Actually Paid to

Total

Peer Group

EBITDA

 

Executive

Compensation

Non-PEO Named

Non-PEO Named

Shareholder

Total

Net (loss)

(non-GAAP)

 

Officer (PEO)

Actually Paid to

Executive

Executive Officers

Return

Shareholder

income

($ in millions)

Year

  ​

  ​

($) (1)

  ​

  ​

PEO ($) (3)

  ​

  ​

Officers ($) (2)

  ​

  ​

($) (3)

  ​

  ​

($)

  ​

  ​

Return ($) (4)

  ​

  ​

($ in millions)

  ​

  ​

(5)

 

2025

5,358,983

(1,220,529)

1,984,661

545,114

2

145

(545.6)

162.5

2024

 

5,423,299

 

4,947,052

 

1,562,968

 

1,275,165

 

16

 

146

 

(348.5)

 

203.7

2023

 

5,779,845

 

2,320,488

 

1,923,323

 

749,722

 

26

 

146

 

(701.3)

 

154.3

2022

 

5,793,583

 

(1,961,363)

 

1,561,047

 

305,441

 

68

 

132

 

(430.9)

 

311.7

2021

 

7,001,892

 

6,409,637

 

1,747,866

 

1,868,496

 

151

 

149

 

440.0

 

729.4

(1)Mr. Bozich served as the Company’s PEO (President and CEO) for each year presented.
(2)The Company’s Non-PEO NEOs were: (i) in 2025, Mr. Stasse, Mr. Chaclas, Ms. Van Kessel and Ms. Reverberi; (ii) in 2024, Mr. Stasse, Ms. Reverberi, Mr. Chaclas and Ms. Cooney; (iii) in 2023, Mr. Stasse, Mr. Chaclas, Ms. Cooney and Han Hendriks, and Andre Lanning (as former NEO); (iv) in 2022, Mr. Stasse, Mr. Chaclas, Andre Lanning and Ms. Cooney and (v) in 2021, Mr. Stasse, Mr. Chaclas, Andre Lanning and Ms. Reverberi.
(3)The following table provides additional information as to the amounts deducted from and added to Summary Compensation Table (“SCT”) total compensation for the applicable year pursuant to Item 402(v) of Regulation S-K to determine “compensation actually paid” to the PEO and Non-PEO NEOs:

PEO (a)

  ​

  ​

2025

  ​

  ​

2024

  ​

  ​

2023

  ​

  ​

2022

  ​

  ​

2021

 

Summary Compensation Table – Total Compensation

$

5,358,983

$

5,423,299

$

5,779,845

$

5,793,583

$

7,001,892

Subtract fair value of stock awards and options awards granted in fiscal year

$

(4,161,228)

$

(2,991,139)

$

(4,127,971)

$

(3,959,041)

$

(3,587,469)

Add fair value of current-year equity awards outstanding and unvested as of year-end

$

377,130

$

3,492,354

$

1,071,413

$

1,141,272

$

2,944,350

Add fair value of current-year equity awards that vested during the fiscal year

$

0

$

0

$

0

$

0

$

0

Add/subtract change in fair value of prior-year equity awards

$

(2,763,394)

$

(684,680)

$

(1,111,075)

$

(5,226,633)

$

(635,819)

Add/subtract change in fair value as of vesting date of prior-year equity awards vested during fiscal year

$

89,468

$

(144,590)

$

807,733

$

473,289

$

686,682

Subtract fair value of prior-year awards forfeited during fiscal year

$

(121,489)

$

(148,192)

$

(99,457)

$

(183,833)

$

0

Compensation Actually Paid

$

(1,220,529)

$

4,947,052

$

2,320,488

$

(1,961,363)

$

6,409,637

Average Non-PEO Named Executive Officers (a)

  ​

  ​

2025

  ​

  ​

2024

  ​

  ​

2023

  ​

  ​

2022

  ​

  ​

2021

 

Summary Compensation Table – Average Total Compensation

$

1,984,661

$

1,562,968

$

1,923,323

$

1,561,047

$

1,747,866

Subtract fair value of stock awards and options awards granted in fiscal year

$

(811,940)

$

(532,621)

$

(1,067,944)

$

(777,406)

$

(600,379)

Add fair value of current-year equity awards outstanding and unvested as of year-end

$

78,574

$

603,086

$

290,243

$

224,104

$

492,497

Add fair value of current-year equity awards that vested during the fiscal year

$

0

$

0

$

0

$

0

$

0

Add/subtract change in fair value of prior-year equity awards

$

(543,313)

$

(188,895)

$

(191,378)

$

(754,874)

$

13,556

Add/subtract change in fair value as of vesting date of prior-year equity awards vested during fiscal year

$

14,187

$

(26,303)

$

68,982

$

25,904

$

123,014

Subtract fair value of prior-year awards forfeited during fiscal year

$

(13,447)

$

(12,916)

$

(10,253)

$

(5,841)

$

(24,085)

Subtract change in present value of accumulated benefit under all defined benefit and actuarial pension plans

$

(346,579)

$

(261,449)

$

(274,313)

$

(124,783)

$

(44,879)

Add pension value attributable to current year and change in pension value attributable to plan amendments made in the current year

$

182,970

$

131,296

$

11,061

$

157,290

$

160,906

Compensation Actually Paid

$

545,114

$

1,275,165

$

749,722

$

305,441

$

1,868,496

(a)The fair value of equity awards were calculated using valuation assumptions that materially differ from those disclosed at the time of grant, including: (1) the fair value of RSU awards was calculated using the closing price of our ordinary shares as of the last day of the applicable year or on the date of vesting, as applicable; (2) the fair value of PSU awards was estimated using the Monte Carlo Simulation method (which reflects for each particular award and valuation date adjustments for: actual performance, expected volatility, risk-free interest rate, correlation coefficient, and accrued dividends); and (3) the fair value of options was estimated using the Black-Scholes option-pricing model (which reflects, for each particular award and valuation date, adjustments for expected volatility, risk-free interest rate, dividend yield, expected term (calculated using the simplified method) and stock price).
(4)The Company’s peer group is the S&P 500 Chemicals Industry GICS Level 3 Index. This index is the published line-of-business index utilized in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025.
(5)Adjusted EBITDA is our primary non-GAAP financial measure. See “Use of Non-GAAP Measures” below for a definition of Adjusted EBITDA, an explanation of why we believe this measure is useful to investors and the limitations of this measure.
       
Company Selected Measure Name Adjusted EBITDA        
Named Executive Officers, Footnote
(1)Mr. Bozich served as the Company’s PEO (President and CEO) for each year presented.
(2)The Company’s Non-PEO NEOs were: (i) in 2025, Mr. Stasse, Mr. Chaclas, Ms. Van Kessel and Ms. Reverberi; (ii) in 2024, Mr. Stasse, Ms. Reverberi, Mr. Chaclas and Ms. Cooney; (iii) in 2023, Mr. Stasse, Mr. Chaclas, Ms. Cooney and Han Hendriks, and Andre Lanning (as former NEO); (iv) in 2022, Mr. Stasse, Mr. Chaclas, Andre Lanning and Ms. Cooney and (v) in 2021, Mr. Stasse, Mr. Chaclas, Andre Lanning and Ms. Reverberi.
       
Peer Group Issuers, Footnote
(4)The Company’s peer group is the S&P 500 Chemicals Industry GICS Level 3 Index. This index is the published line-of-business index utilized in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025.
       
PEO Total Compensation Amount $ 5,358,983 $ 5,423,299 $ 5,779,845 $ 5,793,583 $ 7,001,892
PEO Actually Paid Compensation Amount $ (1,220,529) 4,947,052 2,320,488 (1,961,363) 6,409,637
Adjustment To PEO Compensation, Footnote
(3)The following table provides additional information as to the amounts deducted from and added to Summary Compensation Table (“SCT”) total compensation for the applicable year pursuant to Item 402(v) of Regulation S-K to determine “compensation actually paid” to the PEO and Non-PEO NEOs:

PEO (a)

  ​

  ​

2025

  ​

  ​

2024

  ​

  ​

2023

  ​

  ​

2022

  ​

  ​

2021

 

Summary Compensation Table – Total Compensation

$

5,358,983

$

5,423,299

$

5,779,845

$

5,793,583

$

7,001,892

Subtract fair value of stock awards and options awards granted in fiscal year

$

(4,161,228)

$

(2,991,139)

$

(4,127,971)

$

(3,959,041)

$

(3,587,469)

Add fair value of current-year equity awards outstanding and unvested as of year-end

$

377,130

$

3,492,354

$

1,071,413

$

1,141,272

$

2,944,350

Add fair value of current-year equity awards that vested during the fiscal year

$

0

$

0

$

0

$

0

$

0

Add/subtract change in fair value of prior-year equity awards

$

(2,763,394)

$

(684,680)

$

(1,111,075)

$

(5,226,633)

$

(635,819)

Add/subtract change in fair value as of vesting date of prior-year equity awards vested during fiscal year

$

89,468

$

(144,590)

$

807,733

$

473,289

$

686,682

Subtract fair value of prior-year awards forfeited during fiscal year

$

(121,489)

$

(148,192)

$

(99,457)

$

(183,833)

$

0

Compensation Actually Paid

$

(1,220,529)

$

4,947,052

$

2,320,488

$

(1,961,363)

$

6,409,637

(a)The fair value of equity awards were calculated using valuation assumptions that materially differ from those disclosed at the time of grant, including: (1) the fair value of RSU awards was calculated using the closing price of our ordinary shares as of the last day of the applicable year or on the date of vesting, as applicable; (2) the fair value of PSU awards was estimated using the Monte Carlo Simulation method (which reflects for each particular award and valuation date adjustments for: actual performance, expected volatility, risk-free interest rate, correlation coefficient, and accrued dividends); and (3) the fair value of options was estimated using the Black-Scholes option-pricing model (which reflects, for each particular award and valuation date, adjustments for expected volatility, risk-free interest rate, dividend yield, expected term (calculated using the simplified method) and stock price).
       
Non-PEO NEO Average Total Compensation Amount $ 1,984,661 1,562,968 1,923,323 1,561,047 1,747,866
Non-PEO NEO Average Compensation Actually Paid Amount $ 545,114 1,275,165 749,722 305,441 1,868,496
Adjustment to Non-PEO NEO Compensation Footnote
(3)The following table provides additional information as to the amounts deducted from and added to Summary Compensation Table (“SCT”) total compensation for the applicable year pursuant to Item 402(v) of Regulation S-K to determine “compensation actually paid” to the PEO and Non-PEO NEOs:

Average Non-PEO Named Executive Officers (a)

  ​

  ​

2025

  ​

  ​

2024

  ​

  ​

2023

  ​

  ​

2022

  ​

  ​

2021

 

Summary Compensation Table – Average Total Compensation

$

1,984,661

$

1,562,968

$

1,923,323

$

1,561,047

$

1,747,866

Subtract fair value of stock awards and options awards granted in fiscal year

$

(811,940)

$

(532,621)

$

(1,067,944)

$

(777,406)

$

(600,379)

Add fair value of current-year equity awards outstanding and unvested as of year-end

$

78,574

$

603,086

$

290,243

$

224,104

$

492,497

Add fair value of current-year equity awards that vested during the fiscal year

$

0

$

0

$

0

$

0

$

0

Add/subtract change in fair value of prior-year equity awards

$

(543,313)

$

(188,895)

$

(191,378)

$

(754,874)

$

13,556

Add/subtract change in fair value as of vesting date of prior-year equity awards vested during fiscal year

$

14,187

$

(26,303)

$

68,982

$

25,904

$

123,014

Subtract fair value of prior-year awards forfeited during fiscal year

$

(13,447)

$

(12,916)

$

(10,253)

$

(5,841)

$

(24,085)

Subtract change in present value of accumulated benefit under all defined benefit and actuarial pension plans

$

(346,579)

$

(261,449)

$

(274,313)

$

(124,783)

$

(44,879)

Add pension value attributable to current year and change in pension value attributable to plan amendments made in the current year

$

182,970

$

131,296

$

11,061

$

157,290

$

160,906

Compensation Actually Paid

$

545,114

$

1,275,165

$

749,722

$

305,441

$

1,868,496

(a)The fair value of equity awards were calculated using valuation assumptions that materially differ from those disclosed at the time of grant, including: (1) the fair value of RSU awards was calculated using the closing price of our ordinary shares as of the last day of the applicable year or on the date of vesting, as applicable; (2) the fair value of PSU awards was estimated using the Monte Carlo Simulation method (which reflects for each particular award and valuation date adjustments for: actual performance, expected volatility, risk-free interest rate, correlation coefficient, and accrued dividends); and (3) the fair value of options was estimated using the Black-Scholes option-pricing model (which reflects, for each particular award and valuation date, adjustments for expected volatility, risk-free interest rate, dividend yield, expected term (calculated using the simplified method) and stock price).
       
Compensation Actually Paid vs. Total Shareholder Return

Graphic

       
Compensation Actually Paid vs. Net Income

Graphic

       
Compensation Actually Paid vs. Company Selected Measure

Graphic

       
Total Shareholder Return Vs Peer Group

Graphic

       
Tabular List, Table

Most Important Financial Measures

Below is an unranked list of the most important financial measures the Company used during 2025 to link Company performance to executive compensation actually paid.

Adjusted EBITDA*

Free Cash Flow*

Capital Expenditures

Total Shareholder Return

*       See “Use of Non-GAAP Measures” below for a reconciliation of Adjusted EBITDA and Free Cash Flow, which are non-GAAP measures, to Net Income (Loss) and Cash provided by operating activities.

       
Total Shareholder Return Amount $ 2 16 26 68 151
Peer Group Total Shareholder Return Amount 145 146 146 132 149
Net Income (Loss) $ (545,600,000) $ (348,500,000) $ (701,300,000) $ (430,900,000) $ 440,000,000
Company Selected Measure Amount 162,500,000 203,700,000 154,300,000 311,700,000 729,400,000
PEO Name Mr. Bozich        
Measure:: 1          
Pay vs Performance Disclosure          
Name Adjusted EBITDA        
Non-GAAP Measure Description
(5)Adjusted EBITDA is our primary non-GAAP financial measure. See “Use of Non-GAAP Measures” below for a definition of Adjusted EBITDA, an explanation of why we believe this measure is useful to investors and the limitations of this measure.
       
Measure:: 2          
Pay vs Performance Disclosure          
Name Free Cash Flow        
Measure:: 3          
Pay vs Performance Disclosure          
Name Capital Expenditures        
Measure:: 4          
Pay vs Performance Disclosure          
Name Total Shareholder Return        
PEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount $ (4,161,228) $ (2,991,139) $ (4,127,971) $ (3,959,041) $ (3,587,469)
PEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 377,130 3,492,354 1,071,413 1,141,272 2,944,350
PEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (2,763,394) (684,680) (1,111,075) (5,226,633) (635,819)
PEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 0 0 0 0 0
PEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 89,468 (144,590) 807,733 473,289 686,682
PEO | Fair value of prior-year awards forfeited during fiscal year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (121,489) (148,192) (99,457) (183,833) 0
Non-PEO NEO | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (346,579) (261,449) (274,313) (124,783) (44,879)
Non-PEO NEO | Aggregate Pension Adjustments Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 182,970 131,296 11,061 157,290 160,906
Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (811,940) (532,621) (1,067,944) (777,406) (600,379)
Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 78,574 603,086 290,243 224,104 492,497
Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (543,313) (188,895) (191,378) (754,874) 13,556
Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 0 0 0 0 0
Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 14,187 (26,303) 68,982 25,904 123,014
Non-PEO NEO | Fair value of prior-year awards forfeited during fiscal year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount $ (13,447) $ (12,916) $ (10,253) $ (5,841) $ (24,085)