Southern CoMIL:1SO 50 Days Inventory is 65.57 as of Mar. 2026, which is 13% below its 10-year median of 75.45. GuruFocus rates MIL:1SO with a GF Score™ of 50/100 and a GF Value™ of €76.23 (Fairly Valued). The stock has 12 warning signs investors should review. Among 450 Utilities - Regulated companies, Southern Co ranks worse than 82.44% on this metric.
Days Inventory is also known as Days Sales of Inventory (DSI). Southern Co's Average Total Inventories for the
three
months ended in Mar. 2026 was €2,794 Mil. Southern Co's Cost of Goods Sold for the
three
months ended in Mar. 2026 was €3,888 Mil.
Hence, Southern Co's Days Inventory for the
three
months ended in Mar. 2026 was 65.57.
The historical rank and industry rank for Southern Co's Days Inventory or its related term are showing as below:
MIL:1SO'
s Days Inventory Range Over the Past 10 Years
Min: 49.24 Med: 75.45 Max: 91.8
Current: 73.92
During the past 13 years, Southern Co's highest Days Inventory was 91.80. The lowest was 49.24. And the median was 75.45.
MIL:1SO's Days Inventory is ranked worse than 82.44% of 450
companies
in the Utilities - Regulated industry
Industry Median: 22.52
vs MIL:1SO: 73.92
Southern Co's Days Inventory
declined
from Mar. 2025 (73.88) to Mar. 2026 (65.57).
Inventory Turnover measures how fast the company turns over its inventory within a year.
Southern Co's Inventory Turnover for the
three
months ended in Mar. 2026 was 1.39.
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.
Southern Co's Inventory-to-Revenue for the
three
months ended in Mar. 2026 was 0.38.
Southern Co (MIL:1SO) 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.
Southern Co'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.
Southern Co'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.
Southern Co Days Inventory Related Terms
Southern Co Days Inventory Historical Data
* Premium members only.
The historical data trend for Southern Co'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.
For the Utilities - Regulated Electric subindustry, Southern Co'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.
Southern Co Days Inventory vs Utilities - Regulated Industry
For the Utilities - Regulated industry and Utilities sector, Southern Co's Days Inventory distribution charts can be found below:
* The bar in red indicates where Southern Co'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.
Southern Co (MIL:1SO) has a Days Inventory of 65.57 as of Mar. 2026. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Southern Co and its competitors. This is 13% below median its historical median of 75.45. Over the past decade, Southern Co's Days Inventory has ranged from 49.24 to 91.80. According to the industry distribution chart, Southern Co ranks #371 out of 450 companies in the Utilities - Regulated industry, placing it in the top 82.4%.
Is Southern Co's Days Inventory too high?
Southern Co's current Days Inventory of 65.57 is 13% below median its 10-year median of 75.45. Over the past 10 years, this metric has ranged from a low of 49.24 to a high of 91.80. The Utilities - Regulated industry median Days Inventory is 22.52. Southern Co's value of 65.57 is 191.2% above this industry median. Based on the distribution chart, Southern Co ranks #371 out of 450 companies in the Utilities - Regulated industry, which is in the bottom quartile relative to peers. Overall, Southern Co has a GF Score™ of 50/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Southern Co's Days Inventory compare to DUK and AEP?
According to the Utilities - Regulated industry distribution chart, Southern Co ranks #371 out of 450 companies for Days Inventory. This places Southern Co in the lower half of its industry. The industry median Days Inventory is 22.52. Southern Co's value of 65.57 is 191.2% above this benchmark. Historically, Southern Co's own Days Inventory has ranged from 49.24 to 91.80 over the past decade. While the company's 10-year median is 75.45 vs. the industry median of 22.52, Southern Co 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 an Utilities - Regulated company?
The median Days Inventory among Utilities - Regulated companies is 22.52, based on 450 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. Southern Co's current Days Inventory of 65.57 is 191.2% 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 Southern Co and its competitors. For the Utilities - Regulated industry, the median Days Inventory is 22.52 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Southern Co's current Days Inventory is 65.57, which is 13% below median its own 10-year median of 75.45. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Southern Co stock overvalued right now?
Based on GuruFocus' analysis, Southern Co (MIL:1SO) is currently considered Fairly Valued. The stock's GF Value™ is €76.23, compared to a current price of €79.30 — trading 4% above its estimated fair value. The current Days Inventory is 65.57, which is 13% below median its 10-year median of 75.45 and 191.2% above the Utilities - Regulated industry median of 22.52. Southern Co's overall GF Score™ is 50/100 with 12 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 Southern Co (MIL:1SO), the current Days Inventory is 65.57 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 Southern Co (MIL:1SO) Overvalued in 2026?
Based on GuruFocus' analysis, Southern Co stock appears to be overvalued.
The current stock price of €79.30 is trading 4% above its estimated GF Value™ of €76.23.
GuruFocus considers Southern Co to be Fairly Valued.
Key valuation signals for MIL:1SO:
Days Inventory: 65.57 (13% below median its 10-year median of 75.45)
GF Value™: €76.23 vs. price of €79.30 (4% above fair value)
Industry Position: 191.2% above the Utilities - Regulated median (#371 of 450)
No single metric tells the full story. See the MIL:1SO stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Southern is one of the largest utilities in the US. The company serves 9 million customers with vertically integrated electric utilities in three states and natural gas distribution utilities in four states. It owns 46 gigawatts of rate-regulated generating capacity, primarily for serving customers in Georgia, Alabama, and Mississippi. Subsidiary Southern Power owns 13 gigawatts of natural gas generation and renewable energy across the US and sells the electricity primarily under long-term contracts.
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