Texas › Mining › 1,000 to 4,999 participants
Form 5500 statement · plan year 1 Jan 2024 to 31 Dec 2024
Diamond Offshore 401(k) Plan
Sponsored by Diamond Offshore Management Company, Houston, TX
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. Form 5500 contains no individual account balances. Look up the original filing at EFAST2.
Diamond Offshore 401(k) Plan is a 401(k) plan sponsored by Diamond Offshore Management Company of Houston, Texas. For the plan year ending 31 Dec 2024 it reported 1,361 participants, 948 of them active, and net assets of $377M.
Net assets came to $277,319 per participant, well above the $50,295 median for defined contribution plans with 1,000 to 4,999 participants and well above the $73,121 median for defined contribution plans in mining. The figure is an average across everyone in the plan, including former employees with small balances; Form 5500 holds no individual account data.
The employer contributed $6.9M during the year, or $7,231 per active participant against a same-size median of $2,045; participants contributed $13.0M and $691K arrived as rollovers and other contributions. Benefits paid out totalled $55.0M.
Schedule C lists 4 service provider organisations paid $5,000 or more, with reported compensation of $360K: $265 per participant, well above the same-size median of $82.08. Administrative expenses charged to the plan were $362K. Schedule C does not capture every cost: fees netted from fund returns and fees the employer pays directly are outside it.
Across the filings on record, net assets went from $302M in 2009 to $377M in 2024 (up 25%), and participants from 2,948 to 1,361 (down 54%).
The independent accountant's opinion on the financial statements was unmodified (unqualified), from an audit whose scope was limited under ERISA section 103(a)(3)(C) to exclude investment information certified by a bank or insurer.
Compared with similar plans
| Measure | This plan | Same size | Same industry | All US DC plans |
|---|---|---|---|---|
| Net assets per participant | $277,319 | $50,295 | $73,121 | $53,102 |
| Employer contributions per active participant | $7,231 | $2,045 | $4,223 | $2,175 |
| Schedule C compensation per participant | $265 | $82.08 | $126 | $123 |
| Schedule C compensation, share of net assets | 0.10% | 0.17% | 0.20% | 0.26% |
| Administrative expenses per participant | $266 | $82.20 | $127 | $116 |
Peer columns are medians for plan year 2024 across defined contribution plans with 100 or more participants: 1,000 to 4,999 participants (10,207 plans), mining (483) and all US plans (63,460). Fee medians cover plans that report an amount.
Trend by plan year
| Plan year | Participants | Net assets | Per participant | Employer contributions | Participant contributions | Schedule C compensation |
|---|---|---|---|---|---|---|
| 2024 | 1,361 | $377M | $277,319 | $6.9M | $13.0M | $360K |
| 2023 | 1,726 | $356M | $206,139 | $5.4M | $12.4M | $383K |
| 2022 | 1,615 | $319M | $197,765 | $3.2M | $11.1M | $404K |
| 2021 | 1,457 | $421M | $288,763 | $0 | $10.5M | $327K |
| 2020 | 1,378 | $418M | $303,544 | $6.2M | $13.2M | $310K |
| 2019 | 1,622 | $475M | $292,664 | $8.1M | $14.7M | $367K |
| 2018 | 1,589 | $405M | $255,043 | $7.8M | $14.1M | $337K |
| 2017 | 1,731 | $477M | $275,322 | $8.5M | $16.1M | $320K |
| 2016 | 2,321 | $440M | $189,570 | $11.9M | $18.9M | $318K |
| 2015 | 2,837 | $490M | $172,849 | $23.2M | $27.6M | $212K |
| 2014 | 3,065 | $571M | $186,237 | $34.9M | $29.7M | $162K |
| 2013 | 2,929 | $520M | $177,666 | $30.2M | $26.5M | $59K |
| 2012 | 2,473 | $421M | $170,326 | $26.1M | $23.4M | $18K |
| 2011 | 2,448 | $352M | $143,591 | $22.6M | $21.3M | $44K |
| 2010 | 2,566 | $347M | $135,093 | $23.9M | $21.6M | $53K |
| 2009 | 2,948 | $302M | $102,332 | $26.0M | $20.9M | $52K |
Years in which the plan filed the full Form 5500 with 100 or more participants, from 2009. Plan year is the year in which the plan year began.
Statement for the year
- Net assets, beginning of year$355,796,435
- Employer contributions$6,855,446
- Participant contributions$13,046,423
- Rollovers and other contributions$691,227
- Total contributions$20,593,096
- Total income, including investment results$77,106,606
- Benefits paid$55,048,777
- Administrative expenses$361,774
- Total expenses$55,472,045
- Net income$21,634,561
- Net transfers$0
- Net assets, end of year$377,430,996
Participants
- Active participants948
- Retired or separated, receiving benefits6
- Retired or separated, entitled to future benefits396
- Participants with account balances1,340
- Total participants, end of year1,361
Fees and service providers
| Organisation | Services reported | Direct | Indirect |
|---|---|---|---|
| Strategic Advisors, Inc. | Investment advisory (plan) | $224,863 | $0 |
| Prime Capital Investment Advisors | Investment advisory (plan) | $74,967 | $0 |
| Fidelity Investments Institutional | Participant loan processing | $44,246 | $0 |
| Weaver and Tidwell LLP | Accounting (including auditing) | $16,198 | $0 |
Schedule C, Part I line 2: providers that received $5,000 or more, with the form's own service codes. Individuals named on Schedule C (plan employees, individual trustees) are never shown and their compensation is excluded. Eligible indirect compensation disclosed by formula carries no dollar amount. See how to read Schedule C fees.
Administrative expenses on Schedule H
- Investment advisory and management fees$299,830
- Recordkeeping fees$44,246
- IQPA audit fees$16,198
- Contract administrator fees$1,500
- Total administrative expenses$361,774
Investment structure
Assets at year end by Schedule H category. The form shows the kind of vehicle holding the money, not the funds on the menu.
- Registered investment companies (mutual funds)$188M · 49.9%
- Common/collective trusts$176M · 46.7%
- Cash (interest and non-interest bearing)$8.4M · 2.2%
- Participant loans$4.5M · 1.2%
Audit and compliance answers, as filed
- Accountant's opinionUnmodified (unqualified)
- Audit scope limited under ERISA section 103(a)(3)(C)Yes
- Accounting firmWeaver & Tidwell LLP
- Participant contributions reported as transmitted lateNo
- Covered by a fidelity bondYes, $5,000,000
- Blackout period during the yearNo
These are the plan administrator's own answers on Schedule H, Part IV. A reported late transmittal is the filer's disclosure of a timing lapse, usually corrected through the Department of Labor's voluntary program; the amount is the total involved, not a loss.
Plan characteristics
2EProfit-sharing plan2FERISA section 404(c) plan2GTotal participant-directed account plan2JCode section 401(k) feature2KCode section 401(m) arrangement2TTotal or partial participant-directed account plan with a default investment account3DPre-approved pension plan3HPlan sponsor(s) is (are) a member(s) of a controlled group
Codes entered on Form 5500 line 8a, with the labels from the official instructions. Business code 211120: Crude Petroleum Extraction.
Similar plans in Texas
| Plan | Sponsor | Participants | Net assets | Per participant |
|---|---|---|---|---|
| Endeavor Energy Resources, L.P. 401(k) Plan | Endeavor Energy Resources, LP | 1,404 | $119M | $84,435 |
| Axis Energy Services 401(k) Employee Savings Plan | Axis Energy Administration, LLC | 1,316 | $15.8M | $11,998 |
| Nine Energy Service 401(k) Plan | Nine Energy Service, LLC | 1,409 | $59.7M | $42,347 |
| Genesis Energy, LLC Profit Sharing & Retirement Savings Plan | Genesis Energy, LLC | 1,301 | $185M | $141,966 |
| KGS 401(k) Plan | Kodiak Gas Services | 1,434 | $94.0M | $65,566 |
| Parker Wellbore 401(k) Retirement Savings Plan | Parker Drilling Company | 1,226 | $96.5M | $78,693 |
Defined contribution plans in mining closest in size.
Questions and answers
How big is Diamond Offshore 401(k) Plan?
1,361 participants at the end of the plan year ending 31 Dec 2024, of whom 948 were active employees, with net assets of $377,430,996. Among defined contribution plans that places it in the 1,000 to 4,999 participants band, which held 10,207 plans in plan year 2024.
What does Diamond Offshore Management Company contribute per participant?
The filing reports $6,855,446 in employer contributions for the year, which is $7,231 per active participant; the median for plans of the same type and size was $2,045 in plan year 2024. Form 5500 reports the total only. It does not state the match formula, and the per-participant figure is an average, not any one person's contribution.
What fees does the plan pay and how do they compare?
Schedule C reports $360,274 in compensation to service provider organisations, $265 per participant or 0.10% of net assets. The same-size median among plans reporting any Schedule C compensation was $82.08 per participant. Administrative expenses on Schedule H were $361,774. Investment costs deducted inside mutual funds and other pooled vehicles are not itemised on Form 5500, so these figures are a floor rather than a full cost.
Who runs the plan?
The sponsor is Diamond Offshore Management Company. Recordkeeping or administration: Fidelity Investments Institutional. Investment advisory or management: Strategic Advisors, Inc. and Prime Capital Investment Advisors. The financial statements were audited by Weaver & Tidwell LLP. Form 5500 also names the plan administrator's signer and other individuals; this site publishes organisations only.
Was the audit opinion unqualified?
The filing reports an unmodified (unqualified) opinion from a limited-scope audit, in which the accountant did not audit investment information certified by a bank or insurance company. Unmodified (formerly "unqualified") is the standard clean opinion.
How current is this, and does it show my balance?
This is the Form 5500 for the plan year 1 Jan 2024 to 31 Dec 2024, received by the Department of Labor on 25 Sep 2025. Filings are due seven months after the plan year ends, or nine and a half with an extension, so the public record always runs a year or more behind. It contains plan-level totals only: no individual balances, contributions or names of participants exist in the data.
Provenance
Source: U.S. Department of Labor, Employee Benefits Security Administration, Form 5500 research files (Form 5500, Schedule H, Schedule C) for plan years 2009 to 2025, public domain, with filings received through 24 Aug 2026. This page shows the latest filing on record for EIN 13-3560049, plan 001, received 25 Sep 2025; an amended filing replaces it at the next build. Medians and percentiles are computed by this site; see the methodology. Report an error through corrections.