8 plastic stocks to watch

Considering investing in plastic stocks? While the best plastic stocks depend on your portfolio and investment goals, we've identified some plastic stocks that are worth keeping an eye on in the plastics sector. Keep reading to learn more about plastic stocks and how to start investing.

8 popular plastic stocks to watch

We round up a selection of stocks in or related to the plastics industry, weighting the list more heavily towards popular mid- and large-cap stocks.

Best stock	1-year return	Market cap	Exchange	Volume	Buy on Questrade
Dow (DOW.US)	45.74% Dow's 1-year return based on the closing price as of November 5, 2025.	$24.7 billion (USD)	NYSE	12,412,222	Buy now
LyondellBasell Industries (LYB.US)	56.11% LyondellBasell Industries's 1-year return based on the closing price as of November 5, 2025.	$21.7 billion (USD)	NYSE	4,652,800	Buy now
Westlake Chemical Corporation (WLK.US)	3.10% Westlake Chemical Corporation's 1-year return based on the closing price as of November 5, 2025.	$9.1 billion (USD)	NYSE	1,957,140	Buy now
AptarGroup (ATR.US)	23.14% AptarGroup's 1-year return based on the closing price as of November 5, 2025.	$9.1 billion (USD)	NYSE	656,664	Buy now
Silgan (SLGN.US)	2.95% Silgan's 1-year return based on the closing price as of November 5, 2025.	$4.2 billion (USD)	NYSE	1,048,300	Buy now
Myers Industries (MYE.US)	60.44% Myers Industries's 1-year return based on the closing price as of November 5, 2025.	$1.2 billion (USD)	NYSE	414,529	Buy now
Amcor (AMCR.US)	500.99% Amcor's 1-year return based on the closing price as of November 5, 2025.	$21.1 billion (USD)	NYSE	8,523,400	Buy now
Trinseo (TSE.US)	-19.42% Trinseo's 1-year return based on the closing price as of November 5, 2025.	$8.3 million (USD)	NYSE	25,062,000	Buy now

The values in this table are accurate as of the market close on November 3, 2026, or the most recent data available. Volume refers to the number of shares traded during the day.

What to look for when investing in plastic stock

The plastics industry is affected by a range of complex factors such as trade policies, regulations, and fluctuating supply and demand. So when considering plastic stocks to buy, it's important that you have access to vital information about a company's financial health, leadership team, and market positioning.

Also keep in mind that, while volatility can be ideal for day traders, long-term investors will want to look for stocks to offer steadier gains over time.

How to invest in plastic stock

1. Research the plastics industry. Before investing, learn about the plastic stock sector, its trends and the companies within it. Look at each company's financial health, potential for growth and past performance to identify stocks that fit your investment goals.
2. Choose a stock trading platform. Compare trading fees, access to trading tools and user interface options. We've identified reliable trading platforms to help narrow down your options below or check out the best stock trading apps in Canada to find one that suits your needs.
3. Open and fund your account. Sign up with your personal details and link a bank account or funding method to deposit money before you start trading.
4. Select the plastic stock(s) to buy. Search by company name or ticker symbol, like DOW or LYB. Compare key metrics such as market cap, price history and earnings per share to pick the best stock for your strategy.
5. Buy the stock and monitor performance. Place your order to buy the stock and track its performance over time. Consider setting alerts, signing up for industry newsletters or using platform research tools to stay up to date on market changes.

Our top picks for where to buy plastic stocks

Are plastic stocks a good investment?

While it's possible to turn a profit investing in plastic stocks, keep in mind that—like any investment—plastic stocks are not immune to risk. These stocks are subject to fluctuating conditions both in the market and in the plastics industry, so carefully vet your picks before you invest.

What are the best plastic stocks?

A lot of factors go into picking the best plastic stocks. Stock performance can be impacted by factors like market conditions, company decisions and global events. Plus, what may be a strong plastic stock investment for one person might not be suitable for another.

That said, we rounded up this list of popular plastic stocks in or related to the plastics industry to help narrow down your options:

• Dow (DOW)
• LyondellBasell Industries (LYB)
• Westlake Chemical Corporation (WLK)
• AptarGroup (ATR)
• Silgan (SLGN)
• Myers Industries (MYE)
• Amcor (AMCR)
• Trinseo (TSE)

Keep in mind that this is not a "best" list or a recommendation. It highlights some plastic stocks for informational purposes only and does not indicate past or future performance or investment advice. We do not guarantee any investment performance.

We've outlined detailed company and stock performance details for each plastic stock below. Keep reading to decide if any of these companies are the right investment for you.

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Dow (DOW)

Dow Inc., through its subsidiaries, provides various materials science solutions for packaging, infrastructure, mobility, and consumer applications in the United States, Canada, Europe, the Middle East, Africa, India, the Asia Pacific, and Latin America. The company operates through Packaging & Specialty Plastics, Industrial Intermediates & Infrastructure, and Performance Materials & Coatings segments.

The Packaging & Specialty Plastics segment provides ethylene, propylene, polyethylene, and aromatics products; and other ethylene derivatives, such as polyolefin elastomers, ethylene vinyl acetate, and ethylene propylene diene monomer rubber.

Closing stock price	$32.70
Market Capitalization The total market value of Dow's outstanding shares	$24.7 billion
Gross profit (TTM)	$4.7 billion
Profit margin	-2.11%
Revenue (TTM)	$42.6 billion
Earnings per share (TTM)	-$1.29
52-week stock price range	$19.95 – $41.82

All dollar amounts in this table are in USD. TTM refers to the "trailing 12 months." All values are accurate as of the market close on November 3, 2026.

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LyondellBasell Industries (LYB)

LyondellBasell Industries N. V.

operates as a chemical company in the United States, Germany, China, Mexico, Italy, Japan, France, Poland, the Netherlands, and internationally.

Closing stock price	$68.64
Market Capitalization The total market value of LyondellBasell Industries's outstanding shares	$21.7 billion
Gross profit (TTM)	$4 billion
Profit margin	-1.13%
Revenue (TTM)	$31.2 billion
Earnings per share (TTM)	-$0.83
52-week stock price range	$39.12 – $82.22

All dollar amounts in this table are in USD. TTM refers to the "trailing 12 months." All values are accurate as of the market close on October 29, 2026.

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Westlake Chemical Corporation (WLK)

Westlake Corporation manufactures and markets performance and essential materials, and housing and infrastructure products in the United States, Canada, Germany, China, Mexico, Brazil, France, Italy, and internationally. It operates through two segments, Performance and Essential Materials and The Housing and Infrastructure Products.

The Performance and Essential Materials segment offers ethylene, polyethylene, chlor-alkali, chlorinated derivative products, ethylene dichloride, vinyl chloride monomer, polyvinyl chloride (PVC), epoxy specialty resins, and base epoxy resins and intermediaries.

Closing stock price	$67.90
Market Capitalization The total market value of Westlake Chemical Corporation's outstanding shares	$9.1 billion
Gross profit (TTM)	$1.2 billion
Profit margin	-10.94%
Revenue (TTM)	$11.3 billion
Earnings per share (TTM)	-$9.99
52-week stock price range	$54.84 – $122.63

All dollar amounts in this table are in USD. TTM refers to the "trailing 12 months." All values are accurate as of the market close on November 3, 2026.

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AptarGroup (ATR)

AptarGroup, Inc. designs and manufactures drug delivery, consumer product dispensing, and active material science solutions and services for the pharmaceutical, fragrance, facial skincare, color cosmetics, personal care, home care, and food and beverage markets. The company operates through three segments: Pharma, Beauty, and Closures.

It provides dispensing pumps used to dispense sprays, liquids, or lotions from non-pressurized containers; fine-mist pumps for pharmaceutical and fragrance applications; and lotion pumps for viscous formulations, as well as closures, such as dispensing and non-dispensing solutions that enable product delivery without removal of the cap and used across various consumer end markets.

Closing stock price	$142.31
Market Capitalization The total market value of AptarGroup's outstanding shares	$9.1 billion
Gross profit (TTM)	$1.4 billion
Profit margin	6.70%
Revenue (TTM)	$4 billion
Earnings per share (TTM)	$5.54
52-week stock price range	$110.56 – $145.82

All dollar amounts in this table are in USD. TTM refers to the "trailing 12 months." All values are accurate as of the market close on November 2, 2026.

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Silgan (SLGN)

Silgan Holdings Inc., together with its subsidiaries, manufactures and sells rigid packaging solutions for consumer goods products in the United States and internationally. It operates through three segments: Dispensing and Specialty Closures, Metal Containers, and Custom Containers.

The company offers integrated dispensing packaging solutions, proprietary metal and plastic specialty closures, and capping/sealing equipment and detection systems for fragrance and beauty, food, beverage, personal and health care, home care, and lawn and garden markets.

Closing stock price	$40.51
Market Capitalization The total market value of Silgan's outstanding shares	$4.2 billion
Gross profit (TTM)	$1.1 billion
Profit margin	4.05%
Revenue (TTM)	$6.7 billion
Earnings per share (TTM)	$2.55
52-week stock price range	$33.70 – $48.78

All dollar amounts in this table are in USD. TTM refers to the "trailing 12 months." All values are accurate as of the market close on October 29, 2026.

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Myers Industries (MYE)

Myers Industries, Inc. engages in the design, manufacture, and sale of plastic, metal, and rubber products primarily in the United States, Canada, and Europe. Its products include plastic reusable containers, pallets, small parts bins, bulk shipping containers, storage and organization products, OEM parts, custom plastic products, composite ground protection matting, tire repair and retreading products, and consumer fuel containers, as well as tanks for water, fuel, and waste handling.

The company also manufactures and sells various traffic markings, such as reflective highway marking tapes.

Closing stock price	$28.59
Market Capitalization The total market value of Myers Industries's outstanding shares	$1.2 billion
Gross profit (TTM)	$295.1 million
Profit margin	4.34%
Revenue (TTM)	$844.6 million
Earnings per share (TTM)	$1.34
52-week stock price range	$16.08 – $37.29

All dollar amounts in this table are in USD. TTM refers to the "trailing 12 months." All values are accurate as of the market close on November 3, 2026.

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Amcor (AMCR)

Amcor plc, together with its subsidiaries, develops and produces packaging solutions for nutrition, health, beauty, and wellness categories in Europe, North America, Latin America, and the Asia Pacific. Its products include apparel, applicators, bags and bulk bags, bottles and vials, building materials, canisters and jerrycans, drinking cups, films and laminates, jars, lids, tapes and adhesives, trays, tubes, wipes packaging solutions, and miscellaneous and accessories, as well as tubs and pots.

The company's Global Flexible Packaging Solutions segment develops and supplies flexible packaging; and supplies polymer resin, aluminum, and fiber based flexible packaging solutions.

Closing stock price	$48.50
Market Capitalization The total market value of Amcor's outstanding shares	$21.1 billion
Gross profit (TTM)	$4.7 billion
Profit margin	4.71%
Revenue (TTM)	$23.5 billion
Earnings per share (TTM)	$2.37
52-week stock price range	$35.15 – $48.76

All dollar amounts in this table are in USD. TTM refers to the "trailing 12 months." All values are accurate as of the market close on November 3, 2026.

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Trinseo (TSE)

Trinseo PLC provides specialty material solutions in the United States, Europe, the Asia-Pacific, and internationally. It operates through four segments: Engineered Materials, Latex Binders, Polymer Solutions, and Americas Styrenics.

The Engineered Materials segment offers rigid thermoplastic compounds and blends, soft thermoplastic, continuous cast, cell cast, activated methyl methacrylates, polymethyl methacrylates (PMMA) resins, and extruded PMMA sheets and resins for consumer electronics, medical, footwear, automotive, and building and construction applications under the EMERGE, CALIBRE, PLEXIGLAS, ALTUGLAS, ACRYSPA, AVONITE, STUDIO, MEGOL, APILON, APIGO, and APINAT trade names.

Closing stock price	$1.12
Market Capitalization The total market value of Trinseo's outstanding shares	$8.3 million
Gross profit (TTM)	$193.8 million
Profit margin	-13.15%
Revenue (TTM)	$3.1 billion
Earnings per share (TTM)	-$11.57
52-week stock price range	$0.00 – $1.55

All dollar amounts in this table are in USD. TTM refers to the "trailing 12 months." All values are accurate as of the market close on October 29, 2026.

Compare trading platforms to buy plastic stock

Compare special offers, low fees and a wide range of investment options among popular trading platforms in Canada. Note that the dollar amounts in the table below are in CAD.

Related: Compare the best stock trading platforms in Canada

Bottom line

If you're considering adding plastic stocks to your portfolio, make sure you thoroughly look into any companies before investing to help mitigate risk. We've compiled a list of plastic stocks to help narrow down your options. Then choose a legitimate stock trading platform to start investing. After that it comes down to monitoring the plastics industry to know when to buy, sell or hold. How to buy stocks in Canada

Frequently asked questions about plastic stocks

• What are plastic stocks?

  Plastic stocks are shares of companies that either directly work in the plastic sector or operate within related industries. Investors interested in buying plastic stocks may be looking to take advantage of market trends or lock in investments for the long haul.

• What is the top plastic stock to buy in 2026?

  Unfortunately, it's almost impossible to choose a single "top" plastic stock to invest in due to factors like market fluctuations, company management and shifting economic trends. These can all change—sometimes overnight—how a stock performs. It's best to do your own research to decide which companies fit within your risk tolerance. Reviewing a company's financial reports and past stock performance can help you decide if it's worth investing in.

• Where can I find information and regular updates about the plastics industry?

  You can keep track of the latest plastics news and updates by signing up for financial newsletters, visiting financial news sites, reading company investor relations pages and using market research platforms. Many online brokerages also offer sector reports, stock screeners and alerts to help you track movements in your stock performance or updates in or related to the plastics industry.

Check these other commodities and investment sectors

If you're thinking about diversifying your portfolio and investing in sectors beyond plastic stocks, here are some others you can consider:

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