401(k) · DOL Form 5500 · 2022
Diamond Offshore Management Company 401(k) Plan
Data updated 2026-08-11
- $319M
- Total assets
- 1,043
- Participants
- 97th
- Percentile by assets
- $306,223
- Avg per participant
Official DOL plan name: Diamond Offshore 401(k) Plan · Sponsored by Diamond Offshore Management Company · Texas · Mining & Oil Extraction
$319M in assets, 1,043 participants
Diamond Offshore Management Company's Diamond Offshore 401(k) Plan reported $319M in total assets and 1,043 participants in its 2022 DOL Form 5500 filing, ranking in the 97th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.
- 97th percentile by assets (of 139,126 plans)
- #841 in Mining & Oil Extraction (892 peers)
Where Diamond Offshore 401(k) Plan sits by assets
Diamond Offshore 401(k) Plan sits in the top 5% of all filed plans by assets, $319M for 1,043 participants (~$306,223/participant), down 24.1% in 2022.
- $319M
- total plan assets (2022 EOY)
- 1,043
- covered participants
- 97th
- percentile by assets (of 139,126 plans)
- $306,223
- avg assets per participant
The plan reported a net loss of $101M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.
Diamond Offshore 401(k) Plan vs the 2022 asset distribution
By assets, Diamond Offshore 401(k) Plan outranks 97% of the 139,126 plans that filed a Form 5500 for the 2022 plan year, and holds roughly 3.2x the national average plan size of $100M (721 average participants).
Scale-class filing particulars (2022)
| Total Assets (Beginning of Year) | $421M |
|---|---|
| Net Assets (End of Year) | $319M |
| Net Income | -$101M |
| Employer EIN | 133560049 |
| Plan Effective Date | 1989-07-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Diamond Offshore Management Company)
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 1 | 1,043 | $319M |
| 2023 | 1 | 1,183 | $356M |
| 2024 | 1 | 1,272 | $377M |
Nearby 401(k) Plans in Texas
Peer 401(k) plans, same state, same plan type, ranked by total assets.
Diamond Offshore 401(k) Plan vs. nearby 401(k) plans in Texas, assets vs. participants
- AT&T Retirement Savings Plan $37.6B · 144,503
- Exxonmobil Savings Plan $21.3B · 23,619
- Caterpillar 401(k) Savings Plan $13.8B · 38,538
- American Airlines, Inc. 401(k) Plan $12.8B · 85,577
- Dell Inc. 401(k) Plan $12.0B · 47,532
Similar-Sized 401(k) Plans Nationally
401(k) plans in other states closest to Diamond Offshore 401(k) Plan by total assets, not by location.
- Macallister Profit Sharing & Savings Plan (IN) $319M · 1,830
- Napa Management Services Corp. Clinical Ees P/S Pl Profit Sharing Plan & Trust (NY) $319M · 1,155
- Sutter Home Winery, Inc. 401(k) and Profit Sharing Plan (CA) $319M · 1,251
- Gordon Rees Scully Mansukhani, LLP 401(k) Retirement Plan (CA) $320M · 1,786
Frequently Asked Questions
How did Diamond Offshore 401(k) Plan assets move in 2022? ▼
How have Diamond Offshore Management Company plan assets changed over time? ▼
Where does Diamond Offshore 401(k) Plan rank by assets among Form 5500 filers? ▼
Which 401(k) plans are similar in size to Diamond Offshore 401(k) Plan? ▼
Next read for Diamond Offshore 401(k) Plan
Scale reading
Ways to act on Diamond Offshore 401(k) Plan's numbers.
- By total assets, Diamond Offshore 401(k) Plan ranks in the top 5% of all filed plans by assets. See the largest plans
- Compare it side-by-side against 3 similar 401(k) plans in Texas. Compare plans
- Diamond Offshore Management Company's sponsor-wide assets have grown 18.2% since 2022 across 3 plan years on file. More Mining & Oil Extraction plans