Industry · Form 5500 business code 331310
Alumina & Aluminum Production & Processing: retirement plans
Plans whose sponsor entered this principal business activity code on Form 5500.
Form 5500 information is as filed by the plan administrator with the Department of Labor and may be amended. Figures reflect the plan year shown, not current balances. The business code is chosen by the filer from the list in the Form 5500 instructions.
For plan year 2024, 92 retirement plans in alumina & aluminum production & processing with 100 or more participants filed Form 5500: 73 defined contribution and 19 defined benefit. They reported 106,847 participant records and $10.5B in net assets, counting every plan on the form.
The median defined contribution plan held $51,147 per participant, close to the national median of $53,031, and its employer put in $1,953 per active participant (national: $2,174). Among plans reporting Schedule C compensation the median was $102 per participant against $123 nationally.
Employers contributed $334M and participants $319M during the year, and the plans paid out $1.18B in benefits.
In 2009 the same group numbered 138 plans with $13.9B; by 2024 it was 92 plans (down 33%) and $10.5B (down 25%). From plan year 2023 the 100-participant line counts participants with account balances, which moved many plans to the short form.
Medians compared with all US plans
| Median plan, plan year 2024 | Industry: DC | US: DC | Industry: DB | US: DB |
|---|---|---|---|---|
| Net assets per participant | $51,147 | $53,031 | $65,791 | $86,234 |
| Employer contributions per active participant | $1,953 | $2,174 | $6,953 | $10,244 |
| Schedule C compensation per participant | $102 | $123 | $347 | $344 |
| Schedule C compensation, share of net assets | 0.24% | 0.26% | 0.56% | 0.42% |
| Administrative expenses per participant | $108 | $116 | $956 | $527 |
Medians across plans with 100 or more participants (71 DC and 19 DB plans with a Schedule H here). Fee medians cover plans reporting an amount. DC: defined contribution, such as 401(k) and 403(b). DB: defined benefit pension.
Distribution of DC plans
| Measure | 25th percentile | Median | 75th percentile | Plans |
|---|---|---|---|---|
| Net assets per participant | $27,466 | $51,147 | $87,385 | 71 |
| Employer contributions per active participant | $1,150 | $1,953 | $3,906 | 69 |
| Schedule C compensation per participant | $61.16 | $102 | $183 | 68 |
| Administrative expenses per participant | $67.22 | $108 | $179 | 68 |
Trend by plan year
| Plan year | Plans 100+ | Participants | Net assets | Employer contributions | Participant contributions | Median DC assets / participant | Median DC Sch. C / participant |
|---|---|---|---|---|---|---|---|
| 2025partial | 12 | 13,917 | $1.81B | $26.9M | $29.0M | $68,721 | $112 |
| 2024 | 92 | 106,847 | $10.5B | $334M | $319M | $51,147 | $102 |
| 2023 | 102 | 108,678 | $10.1B | $268M | $302M | $45,301 | $102 |
| 2022 | 108 | 103,836 | $8.27B | $276M | $291M | $37,604 | $91.06 |
| 2021 | 106 | 123,054 | $11.7B | $669M | $264M | $41,659 | $97.54 |
| 2020 | 105 | 97,452 | $10.8B | $922M | $206M | $43,780 | $94.75 |
| 2019 | 104 | 99,140 | $9.23B | $332M | $197M | $33,768 | $84.89 |
| 2018 | 102 | 129,821 | $10.8B | $361M | $295M | $29,934 | $72.79 |
| 2017 | 105 | 178,434 | $15.8B | $1.10B | $270M | $35,419 | $66.01 |
| 2016 | 105 | 183,992 | $14.7B | $563M | $249M | $35,683 | $69.66 |
| 2015 | 108 | 196,750 | $15.8B | $503M | $258M | $37,168 | $39.55 |
| 2014 | 109 | 199,772 | $16.8B | $541M | $247M | $46,030 | $35.35 |
| 2013 | 112 | 226,365 | $15.8B | $483M | $231M | $40,047 | $31.91 |
| 2012 | 115 | 231,801 | $15.5B | $531M | $223M | $36,559 | $28.06 |
| 2011 | 121 | 221,203 | $14.6B | $695M | $217M | $33,551 | $38.84 |
| 2010 | 130 | 229,594 | $14.9B | $836M | $208M | $31,319 | $43.82 |
| 2009 | 138 | 239,708 | $13.9B | $181M | $208M | $32,357 | $42.24 |
Plan year is the year in which the plan year began. The drop in large plans from 2023 follows a rule change: the 100-participant line now counts participants with account balances, so many plans moved to the short form.
Provider share
Service provider organisations named most often on the Schedule C of the 92 plans on this page's list, by number of plans. A plan usually names several providers.
Largest plans
The 40 largest by participants of 92 plans with a page on this site.
| Plan | Sponsor | State | Type | Participants | Net assets | Per participant | Employer / active | Sch. C / participant |
|---|---|---|---|---|---|---|---|---|
| Arconic Corp. Pension Plan B | Arconic Corporation | PA | DB | 8,339 | $549M | $65,791 | $12,591 | $180 |
| Hydro Extrusion USA, LLC Savings Plan | Hydro Extrusion USA, LLC | IL | DC | 8,177 | $535M | $65,423 | $3,451 | $84.16 |
| Novelis Savings and Retirement Plan | Novelis Corp. | GA | DC | 6,974 | $1.49B | $213,843 | $10,051 | $163 |
| Arconic Corp. Hourly 401(k) Plan | Arconic Corporation | PA | DC | 6,548 | $751M | $114,665 | $5,607 | $145 |
| Silgan Retirement Savings Plan for Hourly Employees | Silgan Containers Manufacturing Corporation | CA | DC | 4,947 | $259M | $52,415 | $1,399 | $70.14 |
| Arconic Corp. Pension Plan a | Arconic Corporation | PA | DB | 4,139 | $539M | $130,246 | $82,197 | $289 |
| Pension Plan for Certain Hourly Ees of Alcoa USA Corp. | Alcoa USA Corp. | PA | DB | 4,018 | $409M | $101,800 | — | — |
| Arconic Corp. Salaried 401(k) Plan | Arconic Corporation | PA | DC | 3,525 | $765M | $217,040 | $8,828 | $145 |
| Kaiser Aluminum Investments Company Hourly Savings and Investment Plan | Kaiser Aluminum Investments Company | TN | DC | 2,805 | $197M | $70,109 | $3,429 | $58.78 |
| Employees Retirement Plan of Suriname Aluminum Co. for Employees in Suriname Plan II | Suriname Aluminum Company LLC | PA | DB | 2,660 | $57.4M | $21,582 | — | — |
| Pension Plan for Certain Salaried Ees of Alcoa USA Corp. | Alcoa USA Corp. | PA | DB | 2,459 | $518M | $210,489 | — | — |
| Century Aluminum Consolidated Retirement Plan | Century Aluminum Company | IL | DB | 1,873 | $156M | $83,089 | $4,881 | $116 |
| Century Aluminum 401(k) Plan | Century Aluminum Company | IL | DC | 1,867 | $150M | $80,190 | $4,302 | $37.40 |
| Silgan Retirement Savings Plan | Silgan Containers Manufacturing Corporation | CA | DC | 1,848 | $331M | $178,896 | $4,237 | $83.32 |
| Retirement Savings Plan for Hourly Ees of Alcoa USA Corp. | Alcoa USA Corp. | PA | DC | 1,840 | $267M | $144,924 | $5,568 | — |
| Retirement Savings Plan for Salaried Ees of Alcoa USA Corp. | Alcoa USA Corp. | PA | DC | 1,600 | $443M | $276,613 | $11,178 | — |
| Kaiser Aluminum Investments Company Savings and Investment Plan | Kaiser Aluminum Investments Company | TN | DC | 1,486 | $247M | $166,374 | $6,668 | $54.31 |
| Century Aluminum Sebree Hourly Pension Plan | Century Aluminum Sebree | IL | DB | 1,276 | $61.8M | $48,411 | $4,550 | $111 |
| Logan Aluminum Pension Plan | Logan Aluminum Inc. | KY | DB | 1,246 | $287M | $230,500 | $37,605 | $928 |
| Novelis Pension Plan | Novelis Corporation | GA | DB | 1,231 | $378M | $307,209 | $3,424 | $1,045 |
| Employees Retirement Plan of Suriname Aluminium Co. for Employees in Suriname Plan I | Suriname Aluminum Company, LLC | PA | DB | 1,140 | $81.6M | $71,556 | — | — |
| Granges Americas Inc. Savings Plan | Granges Americas Inc. | TN | DC | 1,135 | $97.9M | $86,262 | $4,299 | $61.78 |
| Silgan Dispensing Systems Retirement Savings Plan | Silgan Containers Manufacturing Corporation | CA | DC | 1,131 | $56.3M | $49,743 | $3,088 | $80.31 |
| Ceco Environmental 401(k) Savings and Retirement Plan | Ceco Environmental Corp. | TX | DC | 1,111 | $84.7M | $76,195 | $3,141 | $98.43 |
| Western Extrusions Retirement and Savings Plan | Western Extrusions Corporation | TX | DC | 1,068 | $20.4M | $19,099 | $604 | $101 |
| Tower Extrusions, LLC. 401(k) Plan | Tower Extrusions, LLC. | TX | DC | 1,039 | $16.7M | $16,080 | $571 | $140 |
| Silgan White Cap Retirement Plan | Silgan Containers Manufacturing Corporation | CA | DC | 1,037 | $125M | $120,543 | $2,924 | $89.35 |
| Silgan Containers Employees' Retirement Savings Plan - Union | Silgan Containers Manufacturing Corporation | CA | DC | 968 | $42.7M | $44,075 | $746 | $82.97 |
| Keymark-Kasson & Keller Inc. 401(k) Plan | Keymark-Kasson & Keller, Inc. | NY | DC | 918 | $16.9M | $18,362 | $1,060 | $62.08 |
| Aluminum Precision Products, Inc. Employee Savings and Profit Sharing Plan | Aluminum Precision Products, Inc. | CA | DC | 899 | $74.3M | $82,694 | $1,771 | $155 |
| Wise Alloys LLC Pension Plan for Hourly Employees | Constellium Muscle Shoals LLC | AL | DB | 885 | $23.6M | $26,708 | $3,174 | $293 |
| Retirement Savings Plan for Metal Exchange Family of Companies | Metal Exchange, LLC | MO | DC | 879 | $59.7M | $67,956 | $3,068 | $114 |
| Commonwealth Rolled Products, Inc. Hourly 401(k) Plan | Commonwealth Rolled Products, Inc. | OH | DC | 850 | $114M | $134,142 | $2,058 | $130 |
| Pyrotek, Inc. 401(k) and Profit Sharing Plan | Pyrotek Incorporated | WA | DC | 824 | $105M | $127,652 | $2,799 | $325 |
| Tci Texarkana, Inc. 401(k) Plan | Tci Texarkana, Inc. | CA | DC | 793 | $8.2M | $10,282 | $6,280 | $51.25 |
| Kaiser Aluminum Warrick Pension Plan | Kaiser Aluminum Warrick, LLC | IN | DB | 775 | $24.5M | $31,641 | $10,550 | $284 |
| Atalco LLC Employee Savings Plan | Atalco Gramercy, LLC | LA | DC | 772 | $63.1M | $81,741 | $3,911 | $162 |
| Dicastal North America, Inc. 401(k) Plan & Trust | Dicastal North America, Inc. | MI | DC | 771 | $8.3M | $10,701 | $1,175 | $57.23 |
| Hydro Extrusion USA, LLC Pension Plan | Hydro Extrusion USA, LLC | IL | DB | 771 | $48.5M | $62,876 | $27,632 | $778 |
| MTC US Corp. 401(k) Plan | MTC US Corp. | GA | DC | 749 | $54.4M | $72,643 | $5,259 | $219 |
By plan size
By state
Questions and answers
How many retirement plans are there in alumina & aluminum production & processing?
92 plans with 100 or more participants filed Form 5500 for plan year 2024, out of 113 pension plans on the full form. Smaller plans file Form 5500-SF and are counted separately where shown.
What is the typical 401(k) balance in alumina & aluminum production & processing?
The median defined contribution plan reported $51,147 in net assets per participant (middle half of plans: $27,466 to $87,385); nationally it was $53,031. This is a plan-level average that includes former employees, not a typical person's balance.
What do employers contribute in alumina & aluminum production & processing?
The median defined contribution plan received $1,953 in employer contributions per active participant, against $2,174 nationally. Plans with no employer contribution are included at zero.
What are average 401(k) fees in alumina & aluminum production & processing?
Among defined contribution plans that report any Schedule C compensation, the median was $102 per participant and 0.24% of net assets (nationally $123 and 0.26%). Schedule C leaves out fund expense ratios and fees the employer pays, so it understates total cost.
Where does this come from?
Form 5500 annual reports in the EBSA research files, with filings received through 24 Aug 2026. Medians are computed by this site across plans with 100 or more participants.
Provenance
Source: U.S. Department of Labor, Employee Benefits Security Administration, Form 5500 research files, public domain, with filings received through 24 Aug 2026. Totals count every pension plan on the full form; medians and the plan list cover plans with 100 or more participants. See the methodology.