CENTURY ALUMINUM COMPANY has sponsored the creation of one or more 401k plans.
Submission information for form 5500 for 401k plan CENTURY ALUMINUM CONSOLIDATED RETIREMENT PLAN
| Measure | Date | Value |
|---|
| 2023 : CENTURY ALUMINUM CONSOLIDATED RETIREMENT PLAN 2023 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2023-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-12-31 | $0 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-12-31 | $0 |
| Total income from all sources (including contributions) | 2023-12-31 | $15,105,045 |
| Total loss/gain on sale of assets | 2023-12-31 | $0 |
| Total of all expenses incurred | 2023-12-31 | $11,638,262 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2023-12-31 | $11,638,262 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2023-12-31 | $332,552 |
| Value of total assets at end of year | 2023-12-31 | $161,810,955 |
| Value of total assets at beginning of year | 2023-12-31 | $158,344,172 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2023-12-31 | $0 |
| Total interest from all sources | 2023-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2023-12-31 | $0 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2023-12-31 | No |
| Was this plan covered by a fidelity bond | 2023-12-31 | Yes |
| Value of fidelity bond cover | 2023-12-31 | $5,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2023-12-31 | No |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2023-12-31 | No |
| Value of net income/loss | 2023-12-31 | $3,466,783 |
| Value of net assets at end of year (total assets less liabilities) | 2023-12-31 | $161,810,955 |
| Value of net assets at beginning of year (total assets less liabilities) | 2023-12-31 | $158,344,172 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2023-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2023-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2023-12-31 | No |
| Value of interest in master investment trust accounts at end of year | 2023-12-31 | $161,499,644 |
| Value of interest in master investment trust accounts at beginning of year | 2023-12-31 | $153,832,861 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2023-12-31 | No |
| Was there a failure to transmit to the plan any participant contributions | 2023-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2023-12-31 | No |
| Contributions received in cash from employer | 2023-12-31 | $332,552 |
| Employer contributions (assets) at end of year | 2023-12-31 | $311,311 |
| Employer contributions (assets) at beginning of year | 2023-12-31 | $4,511,311 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2023-12-31 | $11,638,262 |
| Did the plan have assets held for investment | 2023-12-31 | No |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2023-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2023-12-31 | No |
| Opinion of an independent qualified public accountant for this plan | 2023-12-31 | Unqualified |
| Accountancy firm name | 2023-12-31 | PLANTE & MORAN, PLLC |
| Accountancy firm EIN | 2023-12-31 | 381357951 |
| Total unrealized appreciation/depreciation of assets | 2023-01-01 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-01-01 | $0 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2023-01-01 | $0 |
| Total income from all sources (including contributions) | 2023-01-01 | $15,105,045 |
| Total loss/gain on sale of assets | 2023-01-01 | $0 |
| Total of all expenses incurred | 2023-01-01 | $11,638,262 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2023-01-01 | $11,638,262 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2023-01-01 | $332,552 |
| Value of total assets at end of year | 2023-01-01 | $161,810,955 |
| Value of total assets at beginning of year | 2023-01-01 | $158,344,172 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2023-01-01 | $0 |
| Total interest from all sources | 2023-01-01 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2023-01-01 | $0 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2023-01-01 | No |
| Was this plan covered by a fidelity bond | 2023-01-01 | Yes |
| Value of fidelity bond cover | 2023-01-01 | $5,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2023-01-01 | No |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2023-01-01 | No |
| Value of net income/loss | 2023-01-01 | $3,466,783 |
| Value of net assets at end of year (total assets less liabilities) | 2023-01-01 | $161,810,955 |
| Value of net assets at beginning of year (total assets less liabilities) | 2023-01-01 | $158,344,172 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2023-01-01 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2023-01-01 | No |
| Were any leases to which the plan was party in default or uncollectible | 2023-01-01 | No |
| Value of interest in master investment trust accounts at end of year | 2023-01-01 | $161,499,644 |
| Value of interest in master investment trust accounts at beginning of year | 2023-01-01 | $153,832,861 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2023-01-01 | No |
| Was there a failure to transmit to the plan any participant contributions | 2023-01-01 | No |
| Has the plan failed to provide any benefit when due under the plan | 2023-01-01 | No |
| Contributions received in cash from employer | 2023-01-01 | $332,552 |
| Employer contributions (assets) at end of year | 2023-01-01 | $311,311 |
| Employer contributions (assets) at beginning of year | 2023-01-01 | $4,511,311 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2023-01-01 | $11,638,262 |
| Did the plan have assets held for investment | 2023-01-01 | No |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2023-01-01 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2023-01-01 | No |
| Opinion of an independent qualified public accountant for this plan | 2023-01-01 | 1 |
| Accountancy firm name | 2023-01-01 | PLANTE & MORAN, PLLC |
| Accountancy firm EIN | 2023-01-01 | 381357951 |
| 2022 : CENTURY ALUMINUM CONSOLIDATED RETIREMENT PLAN 2022 401k financial data |
|---|
| Total unrealized appreciation/depreciation of assets | 2022-12-31 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $0 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-12-31 | $0 |
| Total income from all sources (including contributions) | 2022-12-31 | $-59,167,260 |
| Total loss/gain on sale of assets | 2022-12-31 | $0 |
| Total of all expenses incurred | 2022-12-31 | $16,918,498 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2022-12-31 | $16,804,569 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2022-12-31 | $6,922,623 |
| Value of total assets at end of year | 2022-12-31 | $158,344,172 |
| Value of total assets at beginning of year | 2022-12-31 | $234,429,930 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-12-31 | $113,929 |
| Total interest from all sources | 2022-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2022-12-31 | $0 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2022-12-31 | No |
| Administrative expenses professional fees incurred | 2022-12-31 | $113,929 |
| Was this plan covered by a fidelity bond | 2022-12-31 | Yes |
| Value of fidelity bond cover | 2022-12-31 | $5,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2022-12-31 | No |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2022-12-31 | No |
| Value of net income/loss | 2022-12-31 | $-76,085,758 |
| Value of net assets at end of year (total assets less liabilities) | 2022-12-31 | $158,344,172 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-12-31 | $234,429,930 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2022-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2022-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2022-12-31 | No |
| Value of interest in master investment trust accounts at end of year | 2022-12-31 | $153,832,861 |
| Value of interest in master investment trust accounts at beginning of year | 2022-12-31 | $234,429,930 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2022-12-31 | No |
| Was there a failure to transmit to the plan any participant contributions | 2022-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2022-12-31 | No |
| Contributions received in cash from employer | 2022-12-31 | $6,922,623 |
| Employer contributions (assets) at end of year | 2022-12-31 | $4,511,311 |
| Employer contributions (assets) at beginning of year | 2022-12-31 | $0 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2022-12-31 | $16,804,569 |
| Did the plan have assets held for investment | 2022-12-31 | No |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2022-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2022-12-31 | No |
| Opinion of an independent qualified public accountant for this plan | 2022-12-31 | Unqualified |
| Accountancy firm name | 2022-12-31 | PLANTE & MORAN, PLLC |
| Accountancy firm EIN | 2022-12-31 | 381357951 |
| Total unrealized appreciation/depreciation of assets | 2022-01-01 | $0 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-01-01 | $0 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2022-01-01 | $0 |
| Total income from all sources (including contributions) | 2022-01-01 | $-59,167,260 |
| Total loss/gain on sale of assets | 2022-01-01 | $0 |
| Total of all expenses incurred | 2022-01-01 | $16,918,498 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2022-01-01 | $16,804,569 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2022-01-01 | $6,922,623 |
| Value of total assets at end of year | 2022-01-01 | $158,344,172 |
| Value of total assets at beginning of year | 2022-01-01 | $234,429,930 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2022-01-01 | $113,929 |
| Total interest from all sources | 2022-01-01 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2022-01-01 | $0 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2022-01-01 | No |
| Administrative expenses professional fees incurred | 2022-01-01 | $113,929 |
| Was this plan covered by a fidelity bond | 2022-01-01 | Yes |
| Value of fidelity bond cover | 2022-01-01 | $5,000,000 |
| Were there any nonexempt tranactions with any party-in-interest | 2022-01-01 | No |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2022-01-01 | No |
| Value of net income/loss | 2022-01-01 | $-76,085,758 |
| Value of net assets at end of year (total assets less liabilities) | 2022-01-01 | $158,344,172 |
| Value of net assets at beginning of year (total assets less liabilities) | 2022-01-01 | $234,429,930 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2022-01-01 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2022-01-01 | No |
| Were any leases to which the plan was party in default or uncollectible | 2022-01-01 | No |
| Value of interest in master investment trust accounts at end of year | 2022-01-01 | $153,832,861 |
| Value of interest in master investment trust accounts at beginning of year | 2022-01-01 | $234,429,930 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2022-01-01 | No |
| Was there a failure to transmit to the plan any participant contributions | 2022-01-01 | No |
| Has the plan failed to provide any benefit when due under the plan | 2022-01-01 | No |
| Contributions received in cash from employer | 2022-01-01 | $6,922,623 |
| Employer contributions (assets) at end of year | 2022-01-01 | $4,511,311 |
| Employer contributions (assets) at beginning of year | 2022-01-01 | $0 |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2022-01-01 | $16,804,569 |
| Did the plan have assets held for investment | 2022-01-01 | No |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2022-01-01 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2022-01-01 | No |
| Opinion of an independent qualified public accountant for this plan | 2022-01-01 | 1 |
| Accountancy firm name | 2022-01-01 | PLANTE & MORAN, PLLC |
| Accountancy firm EIN | 2022-01-01 | 381357951 |
| 2021 : CENTURY ALUMINUM CONSOLIDATED RETIREMENT PLAN 2021 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2021-12-31 | $4,106,701 |
| Total unrealized appreciation/depreciation of assets | 2021-12-31 | $4,106,701 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $0 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2021-12-31 | $130,122 |
| Total income from all sources (including contributions) | 2021-12-31 | $22,761,633 |
| Total loss/gain on sale of assets | 2021-12-31 | $337,723 |
| Total of all expenses incurred | 2021-12-31 | $15,739,257 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2021-12-31 | $15,227,585 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2021-12-31 | $0 |
| Value of total assets at end of year | 2021-12-31 | $234,429,930 |
| Value of total assets at beginning of year | 2021-12-31 | $227,537,676 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2021-12-31 | $511,672 |
| Total interest from all sources | 2021-12-31 | $0 |
| Total dividends received (eg from common stock, registered investment company shares) | 2021-12-31 | $1,935,358 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2021-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2021-12-31 | $1,935,358 |
| Administrative expenses professional fees incurred | 2021-12-31 | $22,800 |
| Was this plan covered by a fidelity bond | 2021-12-31 | Yes |
| Value of fidelity bond cover | 2021-12-31 | $5,000,000 |
| Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities | 2021-12-31 | $0 |
| Were there any nonexempt tranactions with any party-in-interest | 2021-12-31 | No |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2021-12-31 | $0 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2021-12-31 | $211,149 |
| Administrative expenses (other) incurred | 2021-12-31 | $16,158 |
| Liabilities. Value of operating payables at end of year | 2021-12-31 | $0 |
| Liabilities. Value of operating payables at beginning of year | 2021-12-31 | $130,122 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2021-12-31 | No |
| Value of net income/loss | 2021-12-31 | $7,022,376 |
| Value of net assets at end of year (total assets less liabilities) | 2021-12-31 | $234,429,930 |
| Value of net assets at beginning of year (total assets less liabilities) | 2021-12-31 | $227,407,554 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2021-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2021-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2021-12-31 | No |
| Investment advisory and management fees | 2021-12-31 | $374,290 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2021-12-31 | $0 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2021-12-31 | $217,926,888 |
| Value of interest in master investment trust accounts at end of year | 2021-12-31 | $234,429,930 |
| Value of interest in master investment trust accounts at beginning of year | 2021-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2021-12-31 | $0 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2021-12-31 | $29 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2021-12-31 | $29 |
| Asset value of US Government securities at end of year | 2021-12-31 | $0 |
| Asset value of US Government securities at beginning of year | 2021-12-31 | $9,399,610 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2021-12-31 | $11,483,543 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2021-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2021-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2021-12-31 | No |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2021-12-31 | $15,227,585 |
| Contract administrator fees | 2021-12-31 | $98,424 |
| Did the plan have assets held for investment | 2021-12-31 | No |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2021-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2021-12-31 | No |
| Aggregate proceeds on sale of assets | 2021-12-31 | $52,947,075 |
| Aggregate carrying amount (costs) on sale of assets | 2021-12-31 | $52,609,352 |
| Opinion of an independent qualified public accountant for this plan | 2021-12-31 | Unqualified |
| Accountancy firm name | 2021-12-31 | PLANTE & MORAN, PLLC |
| Accountancy firm EIN | 2021-12-31 | 381357951 |
| 2020 : CENTURY ALUMINUM CONSOLIDATED RETIREMENT PLAN 2020 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2020-12-31 | $921,755 |
| Total unrealized appreciation/depreciation of assets | 2020-12-31 | $921,755 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $130,122 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2020-12-31 | $130,202 |
| Total income from all sources (including contributions) | 2020-12-31 | $30,858,926 |
| Total loss/gain on sale of assets | 2020-12-31 | $1,457,340 |
| Total of all expenses incurred | 2020-12-31 | $14,184,443 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2020-12-31 | $13,347,745 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2020-12-31 | $0 |
| Value of total assets at end of year | 2020-12-31 | $227,537,676 |
| Value of total assets at beginning of year | 2020-12-31 | $210,863,273 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2020-12-31 | $836,698 |
| Total interest from all sources | 2020-12-31 | $3 |
| Total dividends received (eg from common stock, registered investment company shares) | 2020-12-31 | $5,074,444 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2020-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2020-12-31 | $5,074,444 |
| Administrative expenses professional fees incurred | 2020-12-31 | $64,275 |
| Was this plan covered by a fidelity bond | 2020-12-31 | Yes |
| Value of fidelity bond cover | 2020-12-31 | $5,000,000 |
| Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities | 2020-12-31 | $0 |
| Were there any nonexempt tranactions with any party-in-interest | 2020-12-31 | No |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2020-12-31 | $211,149 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2020-12-31 | $252,722 |
| Administrative expenses (other) incurred | 2020-12-31 | $208,271 |
| Liabilities. Value of operating payables at end of year | 2020-12-31 | $130,122 |
| Liabilities. Value of operating payables at beginning of year | 2020-12-31 | $130,202 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2020-12-31 | No |
| Value of net income/loss | 2020-12-31 | $16,674,483 |
| Value of net assets at end of year (total assets less liabilities) | 2020-12-31 | $227,407,554 |
| Value of net assets at beginning of year (total assets less liabilities) | 2020-12-31 | $210,733,071 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2020-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2020-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2020-12-31 | No |
| Investment advisory and management fees | 2020-12-31 | $454,303 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2020-12-31 | $217,926,888 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2020-12-31 | $198,921,801 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2020-12-31 | $29 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2020-12-31 | $68 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2020-12-31 | $68 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2020-12-31 | $3 |
| Asset value of US Government securities at end of year | 2020-12-31 | $9,399,610 |
| Asset value of US Government securities at beginning of year | 2020-12-31 | $11,688,682 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2020-12-31 | $23,405,384 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2020-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2020-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2020-12-31 | No |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2020-12-31 | $13,347,745 |
| Contract administrator fees | 2020-12-31 | $109,849 |
| Did the plan have assets held for investment | 2020-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2020-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2020-12-31 | No |
| Aggregate proceeds on sale of assets | 2020-12-31 | $22,380,481 |
| Aggregate carrying amount (costs) on sale of assets | 2020-12-31 | $20,923,141 |
| Opinion of an independent qualified public accountant for this plan | 2020-12-31 | Disclaimer |
| Accountancy firm name | 2020-12-31 | PLANTE & MORAN, PLLC |
| Accountancy firm EIN | 2020-12-31 | 381357951 |
| 2019 : CENTURY ALUMINUM CONSOLIDATED RETIREMENT PLAN 2019 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2019-12-31 | $1,100,045 |
| Total unrealized appreciation/depreciation of assets | 2019-12-31 | $1,100,045 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $130,202 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2019-12-31 | $124,609 |
| Total income from all sources (including contributions) | 2019-12-31 | $38,823,041 |
| Total loss/gain on sale of assets | 2019-12-31 | $1,105,398 |
| Total of all expenses incurred | 2019-12-31 | $14,204,098 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2019-12-31 | $12,780,606 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2019-12-31 | $0 |
| Value of total assets at end of year | 2019-12-31 | $210,863,273 |
| Value of total assets at beginning of year | 2019-12-31 | $186,238,737 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2019-12-31 | $1,423,492 |
| Total interest from all sources | 2019-12-31 | $9 |
| Total dividends received (eg from common stock, registered investment company shares) | 2019-12-31 | $5,868,032 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2019-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2019-12-31 | $5,868,032 |
| Administrative expenses professional fees incurred | 2019-12-31 | $30,000 |
| Was this plan covered by a fidelity bond | 2019-12-31 | Yes |
| Value of fidelity bond cover | 2019-12-31 | $5,000,000 |
| Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities | 2019-12-31 | $0 |
| Were there any nonexempt tranactions with any party-in-interest | 2019-12-31 | No |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2019-12-31 | $252,722 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2019-12-31 | $283,272 |
| Administrative expenses (other) incurred | 2019-12-31 | $795,834 |
| Liabilities. Value of operating payables at end of year | 2019-12-31 | $130,202 |
| Liabilities. Value of operating payables at beginning of year | 2019-12-31 | $124,609 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2019-12-31 | No |
| Value of net income/loss | 2019-12-31 | $24,618,943 |
| Value of net assets at end of year (total assets less liabilities) | 2019-12-31 | $210,733,071 |
| Value of net assets at beginning of year (total assets less liabilities) | 2019-12-31 | $186,114,128 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2019-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2019-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2019-12-31 | No |
| Investment advisory and management fees | 2019-12-31 | $451,920 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2019-12-31 | $198,921,801 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2019-12-31 | $169,018,459 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2019-12-31 | $68 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2019-12-31 | $792 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2019-12-31 | $792 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2019-12-31 | $9 |
| Asset value of US Government securities at end of year | 2019-12-31 | $11,688,682 |
| Asset value of US Government securities at beginning of year | 2019-12-31 | $16,936,214 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2019-12-31 | $30,749,557 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2019-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2019-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2019-12-31 | No |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2019-12-31 | $12,780,606 |
| Contract administrator fees | 2019-12-31 | $145,738 |
| Did the plan have assets held for investment | 2019-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2019-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2019-12-31 | No |
| Aggregate proceeds on sale of assets | 2019-12-31 | $39,466,343 |
| Aggregate carrying amount (costs) on sale of assets | 2019-12-31 | $38,360,945 |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2019-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2019-12-31 | Disclaimer |
| Accountancy firm name | 2019-12-31 | PLANTE & MORAN, PLLC |
| Accountancy firm EIN | 2019-12-31 | 381357951 |
| 2018 : CENTURY ALUMINUM CONSOLIDATED RETIREMENT PLAN 2018 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2018-12-31 | $298,588 |
| Total unrealized appreciation/depreciation of assets | 2018-12-31 | $298,588 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $124,609 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2018-12-31 | $39,520 |
| Total income from all sources (including contributions) | 2018-12-31 | $-13,828,522 |
| Total loss/gain on sale of assets | 2018-12-31 | $-154,556 |
| Total of all expenses incurred | 2018-12-31 | $16,361,518 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2018-12-31 | $15,165,260 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2018-12-31 | $0 |
| Value of total assets at end of year | 2018-12-31 | $186,238,737 |
| Value of total assets at beginning of year | 2018-12-31 | $216,343,688 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2018-12-31 | $1,196,258 |
| Total interest from all sources | 2018-12-31 | $225 |
| Total dividends received (eg from common stock, registered investment company shares) | 2018-12-31 | $5,355,980 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2018-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2018-12-31 | $5,355,980 |
| Administrative expenses professional fees incurred | 2018-12-31 | $175,265 |
| Was this plan covered by a fidelity bond | 2018-12-31 | Yes |
| Value of fidelity bond cover | 2018-12-31 | $5,000,000 |
| Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities | 2018-12-31 | $0 |
| Were there any nonexempt tranactions with any party-in-interest | 2018-12-31 | No |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2018-12-31 | $283,272 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2018-12-31 | $1,041,698 |
| Administrative expenses (other) incurred | 2018-12-31 | $265,780 |
| Liabilities. Value of operating payables at end of year | 2018-12-31 | $124,609 |
| Liabilities. Value of operating payables at beginning of year | 2018-12-31 | $39,520 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2018-12-31 | No |
| Value of net income/loss | 2018-12-31 | $-30,190,040 |
| Value of net assets at end of year (total assets less liabilities) | 2018-12-31 | $186,114,128 |
| Value of net assets at beginning of year (total assets less liabilities) | 2018-12-31 | $216,304,168 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2018-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2018-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2018-12-31 | No |
| Investment advisory and management fees | 2018-12-31 | $623,905 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2018-12-31 | $169,018,459 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2018-12-31 | $210,149,370 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year | 2018-12-31 | $792 |
| Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year | 2018-12-31 | $0 |
| Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year | 2018-12-31 | $0 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2018-12-31 | $225 |
| Asset value of US Government securities at end of year | 2018-12-31 | $16,936,214 |
| Asset value of US Government securities at beginning of year | 2018-12-31 | $5,152,620 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2018-12-31 | $-19,328,759 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2018-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2018-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2018-12-31 | No |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2018-12-31 | $15,165,260 |
| Contract administrator fees | 2018-12-31 | $131,308 |
| Did the plan have assets held for investment | 2018-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2018-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2018-12-31 | No |
| Aggregate proceeds on sale of assets | 2018-12-31 | $66,047,697 |
| Aggregate carrying amount (costs) on sale of assets | 2018-12-31 | $66,202,253 |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2018-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2018-12-31 | Disclaimer |
| Accountancy firm name | 2018-12-31 | PLANTE & MORAN, PLLC |
| Accountancy firm EIN | 2018-12-31 | 381357951 |
| 2017 : CENTURY ALUMINUM CONSOLIDATED RETIREMENT PLAN 2017 401k financial data |
|---|
| Unrealized appreciation/depreciation of other (non real estate) assets | 2017-12-31 | $250,099 |
| Total unrealized appreciation/depreciation of assets | 2017-12-31 | $250,099 |
| Total transfer of assets to this plan | 2017-12-31 | $168,526,956 |
| Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $39,520 |
| Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities) | 2017-12-31 | $39,488 |
| Total income from all sources (including contributions) | 2017-12-31 | $5,656,303 |
| Total loss/gain on sale of assets | 2017-12-31 | $74,768 |
| Total of all expenses incurred | 2017-12-31 | $4,469,890 |
| Benefit payments and payments to participlants,beneficiaries,insurance carriers and others | 2017-12-31 | $3,927,429 |
| Total contributions o plan (from employers,participants, others, non cash contrinutions) | 2017-12-31 | $0 |
| Value of total assets at end of year | 2017-12-31 | $216,343,688 |
| Value of total assets at beginning of year | 2017-12-31 | $46,630,287 |
| Total of administrative expenses incurred including professional, contract, advisory and management fees | 2017-12-31 | $542,461 |
| Total interest from all sources | 2017-12-31 | $32 |
| Total dividends received (eg from common stock, registered investment company shares) | 2017-12-31 | $1,331,287 |
| Has a resolution to terminate the plan been adopted during the plan year or any prior plan year | 2017-12-31 | No |
| Total dividends received from registered investment company shares (eg mutual funds) | 2017-12-31 | $1,331,287 |
| Administrative expenses professional fees incurred | 2017-12-31 | $11,175 |
| Was this plan covered by a fidelity bond | 2017-12-31 | Yes |
| Value of fidelity bond cover | 2017-12-31 | $5,000,000 |
| Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities | 2017-12-31 | $0 |
| Were there any nonexempt tranactions with any party-in-interest | 2017-12-31 | No |
| Value of other receiveables (less allowance for doubtful accounts) at end of year | 2017-12-31 | $1,041,698 |
| Value of other receiveables (less allowance for doubtful accounts) at beginning of year | 2017-12-31 | $77,539 |
| Administrative expenses (other) incurred | 2017-12-31 | $312,490 |
| Liabilities. Value of operating payables at end of year | 2017-12-31 | $39,520 |
| Liabilities. Value of operating payables at beginning of year | 2017-12-31 | $39,488 |
| Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser | 2017-12-31 | No |
| Value of net income/loss | 2017-12-31 | $1,186,413 |
| Value of net assets at end of year (total assets less liabilities) | 2017-12-31 | $216,304,168 |
| Value of net assets at beginning of year (total assets less liabilities) | 2017-12-31 | $46,590,799 |
| Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond) | 2017-12-31 | No |
| Were any loans by the plan or fixed income obligations due to the plan in default | 2017-12-31 | No |
| Were any leases to which the plan was party in default or uncollectible | 2017-12-31 | No |
| Investment advisory and management fees | 2017-12-31 | $143,519 |
| Value of interest in registered invesment companies (eg mutual funds) at end of year | 2017-12-31 | $210,149,370 |
| Value of interest in registered invesment companies (eg mutual funds) at beginning of year | 2017-12-31 | $41,749,966 |
| Interest earned from interest bearing cash (including money market accounts and certificates of deposit) | 2017-12-31 | $32 |
| Asset value of US Government securities at end of year | 2017-12-31 | $5,152,620 |
| Asset value of US Government securities at beginning of year | 2017-12-31 | $4,802,782 |
| Net investment gain/loss from registered investment companies (e.g. mutual funds) | 2017-12-31 | $4,000,117 |
| Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets | 2017-12-31 | Yes |
| Was there a failure to transmit to the plan any participant contributions | 2017-12-31 | No |
| Has the plan failed to provide any benefit when due under the plan | 2017-12-31 | No |
| Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers | 2017-12-31 | $3,927,429 |
| Contract administrator fees | 2017-12-31 | $75,277 |
| Did the plan have assets held for investment | 2017-12-31 | Yes |
| Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser | 2017-12-31 | No |
| Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC | 2017-12-31 | No |
| Aggregate proceeds on sale of assets | 2017-12-31 | $8,588,615 |
| Aggregate carrying amount (costs) on sale of assets | 2017-12-31 | $8,513,847 |
| Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d) | 2017-12-31 | Yes |
| Opinion of an independent qualified public accountant for this plan | 2017-12-31 | Disclaimer |
| Accountancy firm name | 2017-12-31 | PLANTE & MORAN, PLLC |
| Accountancy firm EIN | 2017-12-31 | 381357951 |
