401(k) · DOL Form 5500 · 2024
Diamond Offshore Management Company 401(k) Plan
Data updated 2026-08-11
- $377M
- Total assets
- 1,272
- Participants
- 96th
- Percentile by assets
- $296,722
- Avg per participant
Official DOL plan name: Diamond Offshore 401(k) Plan · Sponsored by Diamond Offshore Management Company · Texas · Mining & Oil Extraction
$377M in assets, 1,272 participants
Diamond Offshore Management Company's Diamond Offshore 401(k) Plan reported $377M in total assets and 1,272 participants in its 2024 DOL Form 5500 filing, ranking in the 96th 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.
- 96th percentile by assets (of 123,622 plans)
- #732 in Mining & Oil Extraction (785 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, $377M for 1,272 participants (~$296,722/participant), up 6.1% in 2024.
- $377M
- total plan assets (2024 EOY)
- 1,272
- covered participants
- 96th
- percentile by assets (of 123,622 plans)
- $296,722
- avg assets per participant
What changed between DOL Form 5500 filings
plan year 2023 → plan year 2024
- Diamond Offshore 401(k) Plan reported net income fell from $36M in the plan year 2023 filing to $22M in the plan year 2024 filing.
- Diamond Offshore 401(k) Plan reported participants rose from 1,183 in the plan year 2023 filing to 1,272 in the plan year 2024 filing.
- Diamond Offshore 401(k) Plan end-of-year assets rose from $356M in the plan year 2023 filing to $377M in the plan year 2024 filing.
Diamond Offshore 401(k) Plan vs the 2024 asset distribution
By assets, Diamond Offshore 401(k) Plan outranks 96% of the 123,622 plans that filed a Form 5500 for the 2024 plan year, and holds roughly 3.8x the national average plan size of $100M (721 average participants).
Scale-class filing particulars (2024)
| Total Assets (Beginning of Year) | $356M |
|---|---|
| Net Assets (End of Year) | $377M |
| Net Income | $22M |
| 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 $43.1B · 109,889
- Exxonmobil Savings Plan $23.7B · 21,990
- Chevron Employee Savings Investment Plan $20.4B · 21,505
- Caterpillar 401(k) Savings Plan $18.8B · 43,873
- Southwest Airlines Co. Retirement Savings Plan $17.0B · 67,820
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.
- Iuoe Local 478 Annuity Fund (CT) $377M · 4,899
- Emblemhealth Services Company, LLC 401(k) Plan (NY) $378M · 1,628
- Faith Technologies Incorporated 401(k) Retirement Plan (WI) $378M · 3,155
- The Middleby Corporation Profit Sharing Plan (IL) $378M · 5,074
Frequently Asked Questions
How did Diamond Offshore 401(k) Plan assets move in 2024? ▼
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