401(k) · DOL Form 5500 · 2024

Amphastar Pharmaceuticals, Inc. 401(k) Plan

Data updated 2026-08-11

$112M
Total assets: 1,341
Participants: 91st
Percentile by assets: $83,373
Avg per participant

Official DOL plan name: Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan · Sponsored by Amphastar Pharmaceuticals, Inc. · California · Manufacturing

$112M in assets, 1,341 participants

Amphastar Pharmaceuticals, Inc.'s Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan reported $112M in total assets and 1,341 participants in its 2024 DOL Form 5500 filing, ranking in the 91st 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.

91st percentile by assets (of 123,622 plans)
#15,458 in Manufacturing (17,777 peers)

Coverage in California

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan covers 1,341 participants in California, 2.1x the typical California plan (state average ~630 per filing). Assets: $112M.

$112M
total plan assets (2024 EOY): 1,341
covered participants: 91st
percentile by assets (of 123,622 plans): $83,373
avg assets per participant

Where Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan sits by total assets

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$111,803,191 Top 9% higher than 91% of 123,620 filed plans

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan end-of-year assets rose from $93M in the plan year 2023 filing to $112M in the plan year 2024 filing.
Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan reported net income fell from $21M in the plan year 2023 filing to $19M in the plan year 2024 filing.
Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan reported participants rose from 1,255 in the plan year 2023 filing to 1,341 in the plan year 2024 filing.

See the national 2023→2024 release diff →

State

California

Industry

Manufacturing

Participants vs California filers

In California, the average filing covers about 630 participants across 15,291 plans. Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan reports 1,341 participants - 2.1x that state average ($112M EOY assets).

California filing particulars

Total Assets (Beginning of Year)	$93M
Net Assets (End of Year)	$112M
Net Income	$19M
Employer EIN	330702205
Plan Effective Date	1998-08-01
Filing Status	FILING RECEIVED

Sponsor Plan History (Amphastar Pharmaceuticals, Inc.)

Total plan assets by year, all Amphastar Pharmaceuticals, Inc. plans on file

Year	Plans	Participants	Total Assets
2022	1	1,240	$71M
2023	1	1,255	$93M
2024	1	1,341	$112M

Nearby 401(k) Plans in California

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan vs. nearby 401(k) plans in California, assets vs. participants

Google LLC 401(k) Savings Plan $48.7B · 116,712
Oracle Corporation 401(k) Savings and Investment Plan $31.0B · 58,962
Intel 401(k) Savings Plan $24.9B · 55,298
Apple 401(k) Plan $24.7B · 101,450
Cisco Systems,Inc. 401(k) Plan $22.7B · 40,452

Compare Amphastar Pharmaceuticals, Inc. 401(k) P… side-by-side with 3 peers →

Similar-Sized 401(k) Plans Nationally

401(k) plans in other states closest to Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan by total assets, not by location.

Pacific Retirement Services, Inc. 401(k) Plan (OR) $112M · 2,570
South Texas Radiology Group Profit Sharing Plan and Trust (TX) $112M · 149
Savings Plan of Entergy Corporation and Subsidiaries VIII (LA) $112M · 2,261
G.L. Homes of Florida Corporation 401(k) Plan (FL) $112M · 574

Frequently Asked Questions

How did Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan assets move in 2024? ▼

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan grew sharply - up 20.7% during 2024, from $93M to $112M. Reported net income was $19M.

How have Amphastar Pharmaceuticals, Inc. plan assets changed over time? ▼

Across 3 plan years on file (2022-2024), Amphastar Pharmaceuticals, Inc.'s sponsor-wide assets grew 56.6%, from $71M to $112M.

Where does Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan rank by assets among Form 5500 filers? ▼

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan ranks in the 91st percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top 10% of all filed plans by assets).

Which 401(k) plans are similar in size to Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan? ▼

Among 401(k) plans in other states, the closest by assets is Pacific Retirement Services, Inc. 401(k) Plan in OR ($112M, 2,570 participants).

Next read for Amphastar Pharmaceuticals, Inc. 401(k) P…

Filing takeaways

Ways to act on Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan's numbers.

By total assets, Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan ranks in the top 10% of all filed plans by assets. See the largest plans
Compare it side-by-side against 3 similar 401(k) plans in California. Compare plans
Amphastar Pharmaceuticals, Inc.'s sponsor-wide assets have grown 56.6% since 2022 across 3 plan years on file. More Manufacturing plans

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 330702205.