Zai LabZLAB +0.76%64 Days Inventory is 191.27 as of Mar. 2026, which is 62% above its 10-year median of 118.41. GuruFocus rates ZLAB with a GF Score™ of 64/100 and a GF Value™ of $30.30 (Possible Value Trap). The stock has 8 warning signs investors should review. Among 640 Biotechnology companies, Zai Lab ranks better than 62.97% on this metric.
Days Inventory is also known as Days Sales of Inventory (DSI). Zai Lab's Average Total Inventories for the
three
months ended in Mar. 2026 was $80.4 Mil. Zai Lab's Cost of Goods Sold for the
three
months ended in Mar. 2026 was $38.3 Mil.
Hence, Zai Lab's Days Inventory for the
three
months ended in Mar. 2026 was 191.27.
The historical rank and industry rank for Zai Lab's Days Inventory or its related term are showing as below:
ZLAB'
s Days Inventory Range Over the Past 10 Years
Min: 33.95 Med: 118.41 Max: 292.52
Current: 131.1
During the past 11 years, Zai Lab's highest Days Inventory was 292.52. The lowest was 33.95. And the median was 118.41.
ZLAB's Days Inventory is ranked better than 62.97% of 640
companies
in the Biotechnology industry
Industry Median: 184.145
vs ZLAB: 131.10
Zai Lab's Days Inventory
increased
from Mar. 2025 (109.71) to Mar. 2026 (191.27).
It might indicate that Zai Lab's sales slowed down.
Inventory Turnover measures how fast the company turns over its inventory within a year.
Zai Lab's Inventory Turnover for the
three
months ended in Mar. 2026 was 0.48.
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.
Zai Lab's Inventory-to-Revenue for the
three
months ended in Mar. 2026 was 0.81.
Zai Lab (NAS:ZLAB) Days Inventory Explanation
Days Inventory indicates the liquidity of the inventory. Generally, a lower Days Inventory is preferred as it indicates a shorter duration to clear off the inventory. An increase of the ratio may indicate the company's sales slowed. Similar ratios related to Days Inventory are:
1. Inventory Turnover measures how fast the company turns over its inventory within a year.
Zai Lab's Inventory Turnover for the
three
months ended in Mar. 2026 is calculated as
2. 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.
Zai Lab's Inventory to Revenue for the
three
months ended in Mar. 2026 is calculated as
* 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.
Be Aware
A lot of business are seasonable. It makes more sense to compare Days Inventory from the same period in the previous year instead of from the previous quarter.
Zai Lab Days Inventory Related Terms
Zai Lab Days Inventory Historical Data
* Premium members only.
The historical data trend for Zai Lab's Days Inventory can be seen below:
* 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.
ZLAB vs TYRA, TRVI, OCUL: Days Inventory Comparison
For the Biotechnology subindustry, Zai Lab's Days Inventory, along with its competitors' market caps and Days Inventory data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Zai Lab Days Inventory vs Biotechnology Industry
For the Biotechnology industry and Healthcare sector, Zai Lab's Days Inventory distribution charts can be found below:
* The bar in red indicates where Zai Lab's Days Inventory falls into.
* 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.
Zai Lab (ZLAB) has a Days Inventory of 191.27 as of Mar. 2026. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Zai Lab and its competitors. This is 62% above median its historical median of 118.41. Over the past decade, Zai Lab's Days Inventory has ranged from 33.95 to 292.52. According to the industry distribution chart, Zai Lab ranks #237 out of 640 companies in the Biotechnology industry, placing it in the top 37%.
Is Zai Lab's Days Inventory too high?
Zai Lab's current Days Inventory of 191.27 is 62% above median its 10-year median of 118.41. Over the past 10 years, this metric has ranged from a low of 33.95 to a high of 292.52. The Biotechnology industry median Days Inventory is 184.15. Zai Lab's value of 191.27 is 3.9% above this industry median. Based on the distribution chart, Zai Lab ranks #237 out of 640 companies in the Biotechnology industry, which is above the industry midpoint. Overall, Zai Lab has a GF Score™ of 64/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does Zai Lab's Days Inventory compare to TYRA and TRVI?
According to the Biotechnology industry distribution chart, Zai Lab ranks #237 out of 640 companies for Days Inventory. This puts Zai Lab in the upper half of its industry. The industry median Days Inventory is 184.15. Zai Lab's value of 191.27 is 3.9% above this benchmark. Historically, Zai Lab's own Days Inventory has ranged from 33.95 to 292.52 over the past decade. While the company's 10-year median is 118.41 vs. the industry median of 184.15, Zai Lab has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Days Inventory for a Biotechnology company?
The median Days Inventory among Biotechnology companies is 184.15, based on 640 companies in the industry. Companies in the top quartile (top 25%) have a Days Inventory significantly above this median, while those in the bottom quartile fall well below. However, Days Inventory should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Zai Lab's current Days Inventory of 191.27 is 3.9% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Days Inventory mean?
A high Days Inventory can signal that a stock is expensive relative to its fundamentals. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Zai Lab and its competitors. For the Biotechnology industry, the median Days Inventory is 184.15 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Zai Lab's current Days Inventory is 191.27, which is 62% above median its own 10-year median of 118.41. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Zai Lab stock overvalued right now?
Based on GuruFocus' analysis, Zai Lab (ZLAB) is currently considered Possible Value Trap. The stock's GF Value™ is $30.30, compared to a current price of $18.52 — trading 38.9% below its estimated fair value. The current Days Inventory is 191.27, which is 62% above median its 10-year median of 118.41 and 3.9% above the Biotechnology industry median of 184.15. Zai Lab's overall GF Score™ is 64/100 with 8 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Days Inventory calculated?
Days Inventory is calculated from a company's financial statements. For Zai Lab (ZLAB), the current Days Inventory is 191.27 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 Zai Lab (ZLAB) Overvalued in 2026?
Based on GuruFocus' analysis, Zai Lab stock appears to be undervalued.
The current stock price of $18.52 is trading 38.9% below its estimated GF Value™ of $30.30.
GuruFocus considers Zai Lab to be Possible Value Trap.
Key valuation signals for ZLAB:
Days Inventory: 191.27 (62% above median its 10-year median of 118.41)
GF Value™: $30.30 vs. price of $18.52 (38.9% below fair value)
Industry Position: 3.9% above the Biotechnology median (#237 of 640)
No single metric tells the full story. See the ZLAB stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Zai Lab Ltd is a biopharmaceutical company focusing on discovering or licensing, developing, and commercializing proprietary therapeutics that address areas of unmet medical need including in the fields of oncology, autoimmune and infectious diseases. Zai Lab has a diverse pipeline of potentially first-in-class product candidates developed through in-house R&D and global partnerships. The company has successfully commercialized several products in China, including Zejula, Optune, Qinlock, and Nuzyra, with plans for further expansion The pipeline of proprietary drug candidates of the company includes ZL-1222, ZL-1311, ZL-6201 and many others.
64GF Score
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