Costain Group PLC (LSE:COST) — Market Cap & Net Worth
Market Cap & Net Worth: Costain Group PLC (COST)
Costain Group PLC (LSE:COST) has a market capitalization of $8.14 Million (GBX66.91 Billion) as of September 21, 2026. Listed on the LSE stock exchange, this UK-based company holds position #27670 globally and #382 in its home market, demonstrating a 14.38% increase in market value over the past year.
Market capitalization, also known as net worth in stock markets, is calculated by multiplying Costain Group PLC's stock price GBX254.50 by its total outstanding shares 262916034 (262.92 Million). Also see COST asset base for a full breakdown of the balance sheet.
Costain Group PLC Market Cap History: 2015 to 2026
Costain Group PLC's market capitalization history from 2015 to 2026. Data shows change from $10.08 Million to $8.14 Million (-2.14% CAGR). Also see COST cash flow conversion for how efficiently the company converts equity into cash flow.
Index Memberships
Costain Group PLC is a constituent of 1 market index:
| Index | Total Market Cap | Weight (%) | Rank by Market Cap |
|---|---|---|---|
|
FTSE All-Share
FTAS
|
$64.29 Billion | 0.01% | #281 of 573 |
Weight: Costain Group PLC's market cap as a percentage of total index value. Rank: Position among all constituents by market cap.
Costain Group PLC Market Cap to Earnings & Revenue Ratios Timeline
This chart shows how Costain Group PLC's valuation ratios have evolved. The Price to Sales (P/S) ratio compares market cap to revenue, while the Price to Earnings (P/E) ratio compares market cap to net income. Lower values may indicate a more undervalued company relative to its financial performance. Check COST share price today for real-time trading data and today's change.
Latest Price to Sales (P/S) Ratio
0.00x
Costain Group PLC's market cap is 0.00 times its annual revenue
Latest Price to Earnings (P/E) Ratio
0.14x
Costain Group PLC's market cap is 0.14 times its annual earnings
What These Ratios Tell Investors:
- Price to Sales (P/S) Ratio: Shows how much investors are paying for each dollar of the company's sales. Lower P/S ratios may indicate undervaluation.
- Price to Earnings (P/E) Ratio: Shows how much investors are paying for each dollar of the company's earnings. This is one of the most common valuation metrics.
- Trends in these ratios over time can indicate changing investor sentiment about the company's future growth prospects.
- Industry comparison provides context for whether the company is valued higher or lower than peers.
| Year | Market Cap (USD) | Revenue (USD) | Net Income (USD) | P/S Ratio | P/E Ratio |
|---|---|---|---|---|---|
| 2016 | $9.89 Million | $1.57 Billion | $26.40 Million | 0.01x | 0.37x |
| 2017 | $13.47 Million | $1.68 Billion | $32.60 Million | 0.01x | 0.41x |
| 2018 | $9.38 Million | $1.46 Billion | $32.80 Million | 0.01x | 0.29x |
| 2019 | $4.99 Million | $1.16 Billion | -$2.90 Million | 0.00x | N/A |
| 2020 | $1.85 Million | $978.40 Million | -$78.00 Million | 0.00x | N/A |
| 2021 | $1.67 Million | $1.14 Billion | -$5.80 Million | 0.00x | N/A |
| 2022 | $1.23 Million | $1.42 Billion | $25.90 Million | 0.00x | 0.05x |
| 2023 | $2.00 Million | $1.33 Billion | $22.10 Million | 0.00x | 0.09x |
| 2024 | $3.39 Million | $1.25 Billion | $30.60 Million | 0.00x | 0.11x |
| 2025 | $5.11 Million | $1.05 Billion | $37.30 Million | 0.00x | 0.14x |
Competitor Companies of COST by Market Capitalization
Companies near Costain Group PLC in the global market cap rankings as of September 21, 2026. Review COST tangible net worth ratio to assess the quality of the company's equity after excluding intangible assets.
Key companies related to Costain Group PLC by market ranking:
- Quanta Services Inc (NYSE:PWR): Ranked #267 globally with a market cap of $95.73 Billion USD.
- Vinci S.A. (PA:DG): Ranked #399 globally with a market cap of $71.27 Billion USD ( €60.96 Billion EUR).
- Comfort Systems USA Inc (NYSE:FIX): Ranked #473 globally with a market cap of $58.12 Billion USD.
- Larsen & Toubro Limited (NSE:LT): Ranked #476 globally with a market cap of $57.80 Billion USD ( Rs5.34 Trillion INR).
| Rank | Company | Symbol | Market Cap | Price |
|---|---|---|---|---|
| #267 | Quanta Services Inc | NYSE:PWR | $95.73 Billion | $636.71 |
| #399 | Vinci S.A. | PA:DG | $71.27 Billion | €110.80 |
| #473 | Comfort Systems USA Inc | NYSE:FIX | $58.12 Billion | $1651.37 |
| #476 | Larsen & Toubro Limited | NSE:LT | $57.80 Billion | Rs3885.00 |
Costain Group PLC Historical Marketcap From 2015 to 2026
Between 2015 and today, Costain Group PLC's market cap moved from $10.08 Million to $ 8.14 Million, with a yearly change of -2.14%.
| Year | Market Cap | Change (%) |
|---|---|---|
| 2026 | GBX8.14 Million | +59.46% |
| 2025 | GBX5.11 Million | +50.57% |
| 2024 | GBX3.39 Million | +69.69% |
| 2023 | GBX2.00 Million | +62.13% |
| 2022 | GBX1.23 Million | -26.26% |
| 2021 | GBX1.67 Million | -9.80% |
| 2020 | GBX1.85 Million | -62.86% |
| 2019 | GBX4.99 Million | -46.80% |
| 2018 | GBX9.38 Million | -30.35% |
| 2017 | GBX13.47 Million | +36.18% |
| 2016 | GBX9.89 Million | -1.89% |
| 2015 | GBX10.08 Million | -- |
End of Day Market Cap According to Different Sources
On Sep 20th, 2026 the market cap of Costain Group PLC was reported to be:
| Source | Market Cap |
|---|---|
| Yahoo Finance | $8.14 Million USD |
| MoneyControl | $8.14 Million USD |
| MarketWatch | $8.14 Million USD |
| marketcap.company | $8.14 Million USD |
| Reuters | $8.14 Million USD |
Market cap values may vary slightly between sources due to differences in calculation methods, timing, and data refresh rates.
About Costain Group PLC
Costain Group PLC provides infrastructure solutions for the transportation, energy, water, and defense sectors in the United Kingdom. The company operates in two segments, Transportation and Natural Resources. It operates in the road, rail, and integrated transport markets, as well as in the water, energy, defense, and nuclear energy markets. The company also provides engineering, construction, m… Read more