401(k) · DOL Form 5500 · 2023

Amphastar Pharmaceuticals, Inc. 401(k) Plan

Data updated 2026-08-25

$93M
Total assets Below avg plan size
1,255
Participants Near avg headcount
91st
Percentile by assets National rank
$73,835
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

$93M in assets, 1,255 participants

Amphastar Pharmaceuticals, Inc.'s Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan reported $93M in total assets and 1,255 participants in its 2023 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.

  • #16,105 in Manufacturing (18,722 peers)

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

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan sits in the top 10% of all filed plans by assets, $93M for 1,255 participants (~$73,835/participant), up 29.8% in 2023.

#16,105
in Manufacturing (18,722 peers)
+29.8%
assets growth YoY
0.9×
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 2023 · DOL Form 5500

$92,662,776 Top 9% higher than 91% of 127,068 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 2023

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan's large-plan peer group by participant headcount

Plan-year 2023 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 (1,255 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan reported net income rose from -$11M in the plan year 2022 filing to $21M in the plan year 2023 filing.
  • Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan end-of-year assets rose from $71M in the plan year 2022 filing to $93M in the plan year 2023 filing.
  • Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan reported participants rose from 1,240 in the plan year 2022 filing to 1,255 in the plan year 2023 filing.

See the national 2022→2023 release diff →

DOL schedule card

Filing strip 330702205 · Amphastar Pharmaceuticals, Inc. PY 2023 · 401(k)

Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan · $93M · 1,255 · 91st

  • EBSA $93M
  • PART 1,255
  • TYPE 91st
  • NET 401(k)
  • BOOK near Dart Container Sales Company, LLC Employee Profit Sharing Plan
  • VS-ST ind #16105

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

Stanley Martin 401(k) Plan$93MKgpco, Inc. 401(k) Savings PlanKgpco, Inc. 401(k) Savings P…$93MAmphastar Pharmaceuticals, Inc. 401(k) Profit Sharing PlanAmphastar Pharmaceuticals, I…$93MDart Container Sales Company, LLC Employee Profit Sharing PlanDart Container Sales Company…$93MHall, Estill Profit Sharing and 401(k) PlanHall, Estill Profit Sharing …$93M
End-of-year total assets ($M) among Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Scale-class filing particulars (2023)

Total Assets (Beginning of Year)$71M
Net Assets (End of Year)$93M
Net Income$21M
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. -50000050000100000150000200000250000 -200204060 Total assets ($B) Participants Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan, Total assets ($B): 0.092662776 · Participants: 1255Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing PlanWells Fargo & Company 401(k) Plan, Total assets ($B): 51.831350351 · Participants: 193919Wells Fargo & Company 401(k) PlanGoogle LLC 401(k) Savings Plan, Total assets ($B): 39.047152408 · Participants: 122867Google LLC 401(k) Savings PlanOracle Corporation 401(k) Savings and Investment Plan, Total assets ($B): 26.320437734 · Participants: 63105Oracle Corporation 401(k) Savings and Investment PlanIntel 401(k) Savings Plan, Total assets ($B): 22.17918189 · Participants: 59863Intel 401(k) Savings PlanApple 401(k) Plan, Total assets ($B): 19.779511539 · Participants: 106111Apple 401(k) Plan
Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan vs. nearby 401(k) plans in California, assets vs. participants

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 Dart Container Sales Company, LLC Employee Profit Sharing Plan in FL ($93M); by covered participants it is Relation Insurance, Inc. Retirement Savings Plan in KS (1,255 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($93M here).

Similar participant headcount

Nearest other-state filings by covered participants (1,255 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. 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 2023?
Amphastar Pharmaceuticals, Inc. 401(k) Profit Sharing Plan grew sharply - up 29.8% during 2023, from $71M to $93M. Reported net income was $21M.
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 127,072 plans that reported assets for plan year 2023 (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 Dart Container Sales Company, LLC Employee Profit Sharing Plan in FL ($93M, 224 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 Relation Insurance, Inc. Retirement Savings Plan in KS (1,255 participants, $100M in assets).