401(k) · DOL Form 5500 · 2024

Amphastar Pharmaceuticals, Inc. 401(k) Plan

Data updated 2026-08-25

$112M
Total assets Near avg plan size
1,341
Participants Near avg headcount
91st
Percentile by assets National rank
$83,373
Avg per participant Below avg balance/head
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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.

  • #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.

#15,458
in Manufacturing (17,777 peers)
+20.7%
assets growth YoY
1.1×
vs typical plan assets (national mean)

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan's outsized position 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

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

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's large-plan peer group by participant headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan lands in the large band (1,341 participants).

What changed between DOL Form 5500 filings

plan year 2023 → 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 →

Published 5500 schedule card

Filing strip 330702205 · Amphastar Pharmaceuticals, Inc. PY 2024 · 401(k)

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan · $112M · 1,341 · 91st

  • VS-ST $112M
  • VS-ST 1,341
  • VS-ST 91st
  • VS-ST 401(k)
  • VS-ST near Pacific Retirement Services, Inc. 401(k) Plan
  • VS-ST ind #15458

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Manufacturing retirement plans → · Plans in California →

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan in the asset neighbourhood

G.L. Homes of Florida Corporation 401(k) PlanG.L. Homes of Florida Corpor…$112MPacific Retirement Services, Inc. 401(k) PlanPacific Retirement Services,…$112MSouth Texas Radiology Group Profit Sharing Plan and TrustSouth Texas Radiology Group …$112MAmphastar Pharmaceuticals, Inc. 401(k) Profit Sharing PlanAmphastar Pharmaceuticals, I…$112MSavings Plan of Entergy Corporation and Subsidiaries VIIISavings Plan of Entergy Corp…$112M
End-of-year total assets ($M) among Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

California filing particulars

Total Assets (Beginning of Year)$93M
Net Assets (End of Year)$112M
Net Income$19M
Employer EIN330702205
Plan Effective Date1998-08-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Amphastar Pharmaceuticals, Inc.)

Sponsor-wide plan assets over time

All Amphastar Pharmaceuticals, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$112M 56.57434165134357% vs 2022
2024 filing year
$60M$80M$100M$120M 202220232024 $71.4M $112M ▲ +56.6%
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 Scatter plot of 6 data points. -50000050000100000150000 -200204060 Total assets ($B) Participants Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan, Total assets ($B): 0.111803191 · Participants: 1341Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing PlanGoogle LLC 401(k) Savings Plan, Total assets ($B): 48.738057415 · Participants: 116712Google LLC 401(k) Savings PlanOracle Corporation 401(k) Savings and Investment Plan, Total assets ($B): 31.02646504 · Participants: 58962Oracle Corporation 401(k) Savings and Investment PlanIntel 401(k) Savings Plan, Total assets ($B): 24.850880304 · Participants: 55298Intel 401(k) Savings PlanApple 401(k) Plan, Total assets ($B): 24.714519387 · Participants: 101450Apple 401(k) PlanCisco Systems,Inc. 401(k) Plan, Total assets ($B): 22.728425546 · Participants: 40452Cisco Systems,Inc. 401(k) Plan
Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan vs. nearby 401(k) plans in California, assets vs. participants
Compare Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan side-by-side with 3 peers →

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan's out-of-state 401(k) peers by assets and headcount

Outside California, the nearest 401(k) by assets is Pacific Retirement Services, Inc. 401(k) Plan in OR ($112M); by covered participants it is Phillips' Companies 401(k) Plan in IL (1,341 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (1,341 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

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).
Which 401(k) plans cover a similar participant headcount to Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Phillips' Companies 401(k) Plan in IL (1,341 participants, $4M in assets).

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.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.