AMPH (Amphastar Pharmaceuticals) Change In Inventory: $16.3 Mil (TTM As of Mar. 2026)

What is Amphastar Pharmaceuticals Change In Inventory?

Amphastar Pharmaceuticals AMPH -1.58% 83 Change In Inventory is $16.3 Mil as of Mar. 2026. GuruFocus rates AMPH with a GF Score™ of 83/100 and a GF Value™ of $48.87 (Significantly Undervalued). The stock has 4 warning signs investors should review.

Amphastar Pharmaceuticals's change in inventory for the quarter that ended in Mar. 2026 was $6.2 Mil. It means Amphastar Pharmaceuticals's inventory declined by $6.2 Mil from Dec. 2025 to Mar. 2026 .

Amphastar Pharmaceuticals's change in inventory for the fiscal year that ended in Dec. 2025 was $-21.1 Mil. It means Amphastar Pharmaceuticals's inventory increased by $21.1 Mil from Dec. 2024 to Dec. 2025 .

Amphastar Pharmaceuticals's Total Inventories for the quarter that ended in Mar. 2026 was $170.2 Mil.

Days Inventory indicates the number of days of goods in sales that a company has in the inventory. Amphastar Pharmaceuticals's Days Inventory for the quarter that ended in Mar. 2026 was 157.02.

Inventory Turnover measures how fast the company turns over its inventory within a year. Amphastar Pharmaceuticals's Inventory Turnover for the quarter that ended in Mar. 2026 was 0.58.

Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue. Amphastar Pharmaceuticals's Inventory-to-Revenue for the quarter that ended in Mar. 2026 was 1.01.

Amphastar Pharmaceuticals (NAS:AMPH) Change In Inventory Explanation

1. Days Inventory indicates the number of days of goods in sales that a company has in the inventory.

Amphastar Pharmaceuticals's Days Inventory for the quarter that ended in is calculated as:

Days Inventory	=	Average Total Inventories	/	Cost of Goods Sold	*	Days in Period
	=	173.542	/	100.849	*	365 / 4
	=	157.02

2. Inventory Turnover measures how fast the company turns over its inventory within a year.

Amphastar Pharmaceuticals's Inventory Turnover for the quarter that ended in Mar. 2026 is calculated as

Inventory Turnover	=	Cost of Goods Sold	/	Average Total Inventories
	=	100.849	/	173.542
	=	0.58

3. Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.

Amphastar Pharmaceuticals's Inventory to Revenue for the quarter that ended in Mar. 2026 is calculated as

Inventory-to-Revenue	=	Average Total Inventories	/	Revenue
	=	173.542	/	171.171
	=	1.01

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Amphastar Pharmaceuticals Change In Inventory Related Terms

Amphastar Pharmaceuticals Change In Inventory Historical Data

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The historical data trend for Amphastar Pharmaceuticals's Change In Inventory can be seen below:

Amphastar Pharmaceuticals Change In Inventory Chart

Amphastar Pharmaceuticals Annual Data

Trend

Dec16

Dec17

Dec18

Dec19

Dec20

Dec21

Dec22

Dec23

Dec24

Dec25

Change In Inventory

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1.26

-11.75

-1.72

-48.80

-21.06

Amphastar Pharmaceuticals Quarterly Data
	Jun21	Sep21	Dec21	Mar22	Jun22	Sep22	Dec22	Mar23	Jun23	Sep23	Dec23	Mar24	Jun24	Sep24	Dec24	Mar25	Jun25	Sep25	Dec25	Mar26
Change In Inventory	Get a 7-Day Free Trial															-31.11	-4.82	5.86	9.01	6.25

83GF Score

Amphastar Pharmaceuticals Inc AMPH

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Amphastar Pharmaceuticals Change In Inventory Calculation

Change In Inventory is the difference between last period's ending inventory and the current period's ending inventory.

Change In Inventory for the trailing twelve months (TTM) ended in Mar. 2026 adds up the quarterly data reported by the company within the most recent 12 months, which was $16.3 Mil.

Frequently Asked Questions Learn more about Change In Inventory →

What does a Change In Inventory of $16.3 Mil mean?

Amphastar Pharmaceuticals (AMPH) has a Change In Inventory of $16.3 Mil as of Mar. 2026. Change in Inventory is the difference between current-period inventory and past-period inventory. View historical data for Amphastar Pharmaceuticals and its competitors.

Is Amphastar Pharmaceuticals' Change In Inventory too high?

Amphastar Pharmaceuticals' current Change In Inventory is $16.3 Mil. Overall, Amphastar Pharmaceuticals has a GF Score™ of 83/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.

How does Amphastar Pharmaceuticals' Change In Inventory compare to ETON and PCRX?

Amphastar Pharmaceuticals' Change In Inventory of $16.3 Mil can be compared against companies in the Drug Manufacturers industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.

What is a good Change In Inventory for a Drug Manufacturers company?

A good Change In Inventory depends on the Drug Manufacturers industry context. However, Change In Inventory should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.

What does a high Change In Inventory mean?

A high Change In Inventory can signal that a stock is expensive relative to its fundamentals. Change in Inventory is the difference between current-period inventory and past-period inventory. View historical data for Amphastar Pharmaceuticals and its competitors. Amphastar Pharmaceuticals's current Change In Inventory is $16.3 Mil. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.

Is Amphastar Pharmaceuticals stock overvalued right now?

Based on GuruFocus' analysis, Amphastar Pharmaceuticals (AMPH) is currently considered Significantly Undervalued. The stock's GF Value™ is $48.87, compared to a current price of $18.74 — trading 61.7% below its estimated fair value. The current Change In Inventory is $16.3 Mil. Amphastar Pharmaceuticals' overall GF Score™ is 83/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.

How is Change In Inventory calculated?

Change In Inventory is calculated from a company's financial statements. For Amphastar Pharmaceuticals (AMPH), the current Change In Inventory is $16.3 Mil as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Is Amphastar Pharmaceuticals (AMPH) Overvalued in 2026?

Based on GuruFocus' analysis, Amphastar Pharmaceuticals stock appears to be undervalued. The current stock price of $18.74 is trading 61.7% below its estimated GF Value™ of $48.87. GuruFocus considers Amphastar Pharmaceuticals to be Significantly Undervalued.

Key valuation signals for AMPH:

Change In Inventory: $16.3 Mil
GF Value™: $48.87 vs. price of $18.74 (61.7% below fair value)
GF Score™: 83/100 with 4 warning signs

No single metric tells the full story. See the AMPH stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.

Amphastar Pharmaceuticals Business Description

Industry Healthcare Drug Manufacturers

Comparable Companies ETON PCRX BIOA ESPR COLL IRWD ALVO PAHC XERS TLRY XTER:MRK XSWX:GALD TSE:4502 SHSE:600276 NSE:SUNPHARMA LSE:HLN XTAE:TEVA XSWX:SDZ ZTS UTHR

Other Exchanges 29A:Germany

Address 11570 6th Street, Rancho Cucamonga, CA, USA, 91730

Website https://www.amphastar.com

Amphastar Pharmaceuticals Inc is a bio-pharmaceutical company focusing on developing, manufacturing, marketing, and selling technically challenging generic and proprietary injectable, inhalation, and intranasal products, as well as insulin active pharmaceutical ingredient (or insulin API products. The company's finished products are used in hospital or urgent care clinical settings and are contracted and distributed through group purchasing organizations and drug wholesalers. The company has one reportable segment: pharmaceutical products. Geographically, the business presence of the firm is seen in the United States, China, and France, of which the U.S. accounts for the majority of the revenue.

83GF Score

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$18.74

Price

$48.87

GF Value

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