Selected research
Market Analysis & Forecast
Global Polymethylsilsesquioxane Market Analysis and Forecast 2026-2032
Market perspective
The global Polymethylsilsesquioxane market is projected to grow from US$ million in 2026 to US$ million by 2032, at a Compound Annual Growth Rate (CAGR) of % during the forecast period.
Polymethylsilsesquioxane's global sales reached XX (Tons) with a value of US$ XX Million, marking an change of XX% compared to the previous year. This performance has positioned ABC Nanotech as the global sales leader, a title it has maintained for several consecutive years. Notably, ABC Nanotech's performance in primary markets is also remarkable. In the Chinese market, sales were XX (Tons), a change of XX% from the previous year. In Europe, sales were XX (Tons), showing a year-on-year of XX%. In the US, sales were XX (Tons), a year-on-year change of XX%.
The major global manufacturers in the Polymethylsilsesquioxane market include ABC Nanotech, EastHill, Grant Industries, Momentive Performance Materials, Shin-Etsu, Jiangxi XinJiaYi New Materials, Guangzhou Batai Chemical, Wacker and The Innovation Company, etc. In 2025, the top three vendors accounted for approximately % of the revenue.
Read the full market overview
In terms of production side, this report researches the Polymethylsilsesquioxane production, growth rate, market share by manufacturers and by region (region level and country level), from 2021 to 2026, and forecast to 2032.
In terms of consumption side, this report focuses on the sales of Polymethylsilsesquioxane by region (region level and country level), by Company, by Type and by Application. from 2021 to 2026 and forecast to 2032.
This report presents an overview of global market for Polymethylsilsesquioxane, capacity, output, revenue and price. Analyses of the global market trends, with historic market revenue or sales data for 2021 - 2025, estimates for 2026, and projections of CAGR through 2032.
This report researches the key producers of Polymethylsilsesquioxane, also provides the consumption of main regions and countries. Of the upcoming market potential for Polymethylsilsesquioxane, and key regions or countries of focus to forecast this market into various segments and sub-segments. Country specific data and market value analysis for the U.S., Canada, Mexico, Brazil, China, Japan, South Korea, Southeast Asia, India, Germany, the U.K., Italy, Middle East, Africa, and Other Countries.
This report focuses on the Polymethylsilsesquioxane sales, revenue, market share and industry ranking of main manufacturers, data from 2021 to 2026. Identification of the major stakeholders in the global Polymethylsilsesquioxane market, and analysis of their competitive landscape and market positioning based on recent developments and segmental revenues. This report will help stakeholders to understand the competitive landscape and gain more insights and position their businesses and market strategies in a better way.
This report analyzes the segments data by Type and by Application, sales, revenue, and price, from 2021 to 2032. Evaluation and forecast the market size for Polymethylsilsesquioxane sales, projected growth trends, production technology, application and end-user industry.
Polymethylsilsesquioxane Segment by Company
ABC Nanotech
EastHill
Grant Industries
Momentive Performance Materials
Shin-Etsu
Jiangxi XinJiaYi New Materials
Guangzhou Batai Chemical
Wacker
The Innovation Company
Polymethylsilsesquioxane Segment by Type
Average Particle Size<2 um
Average Particle Size 2-5 um
Average Particle Size 5-9 um
Average Particle Size >9 um
Polymethylsilsesquioxane Segment by Application
Facial Care
Body Care
Hair Care
Others
Polymethylsilsesquioxane Segment by Region
North America
United States
Canada
Europe
Germany
France
U.K.
Italy
Netherlands
Asia-Pacific
China
Japan
South Korea
India
Australia
China Taiwan
Southeast Asia
South America
Mexico
Brazil
Argentina
Middle East & Africa
Turkey
Saudi Arabia
UAE
Study Objectives
1. To analyze and research the global status and future forecast, involving, production, value, consumption, growth rate (CAGR), market share, historical and forecast.
2. To present the key manufacturers, capacity, production, revenue, market share, and Recent Developments.
3. To split the breakdown data by regions, type, manufacturers, and Application.
4. To analyze the global and key regions market potential and advantage, opportunity and challenge, restraints, and risks.
5. To identify significant trends, drivers, influence factors in global and regions.
6. To analyze competitive developments such as expansions, agreements, new product launches, and acquisitions in the market.
Reasons to Buy This Report
1. This report will help the readers to understand the competition within the industries and strategies for the competitive environment to enhance the potential profit. The report also focuses on the competitive landscape of the global Polymethylsilsesquioxane market, and introduces in detail the market share, industry ranking, competitor ecosystem, market performance, new product development, operation situation, expansion, and acquisition. etc. of the main players, which helps the readers to identify the main competitors and deeply understand the competition pattern of the market.
2. This report will help stakeholders to understand the global industry status and trends of Polymethylsilsesquioxane and provides them with information on key market drivers, restraints, challenges, and opportunities.
3. This report will help stakeholders to understand competitors better and gain more insights to strengthen their position in their businesses. The competitive landscape section includes the market share and rank (in volume and value), competitor ecosystem, new product development, expansion, and acquisition.
4. This report stays updated with novel technology integration, features, and the latest developments in the market.
5. This report helps stakeholders to gain insights into which regions to target globally.
6. This report helps stakeholders to gain insights into the end-user perception concerning the adoption of Polymethylsilsesquioxane.
7. This report helps stakeholders to identify some of the key players in the market and understand their valuable contribution.
Chapter Outline
Chapter 1: Introduces the report scope of the report, executive summary of different market segments (by type and by application, etc), including the market size of each market segment, future development potential, and so on. It offers a high-level view of the current state of the market and its likely evolution in the short to mid-term, and long term.
Chapter 2: Introduces the market dynamics, latest developments of the market, the driving factors and restrictive factors of the market, the challenges and risks faced by manufacturers in the industry, and the analysis of relevant policies in the industry.
Chapter 3: Polymethylsilsesquioxane production/output of global and key producers (regions/countries). It provides a quantitative analysis of the production, and development potential of each producer in the next six years.
Chapter 4: Sales (consumption), revenue of Polymethylsilsesquioxane in global, regional level and country level. It provides a quantitative analysis of the market size and development potential of each region and its main countries and introduces the market development, future development prospects, market space of each country in the world.
Chapter 5: Detailed analysis of Polymethylsilsesquioxane manufacturers competitive landscape, price, sales, revenue, market share and industry ranking, latest development plan, merger, and acquisition information, etc.
Chapter 6: Provides the analysis of various market segments by type, covering the sales, revenue, average price, and development potential of each market segment, to help readers find the blue ocean market in different market segments.
Chapter 7: Provides the analysis of various market segments by application, covering the sales, revenue, average price, and development potential of each market segment, to help readers find the blue ocean market in different downstream markets.
Chapter 8: Provides profiles of key manufacturers, introducing the basic situation of the main companies in the market in detail, including product descriptions and specifications, Polymethylsilsesquioxane sales, revenue, price, gross margin, and recent development, etc.
Chapter 9: North America by type, by application and by country, sales, and revenue for each segment.
Chapter 10: Europe by type, by application and by country, sales, and revenue for each segment.
Chapter 11: China by type, by application, sales, and revenue for each segment.
Chapter 12: Asia (Excluding China) by type, by application and by region, sales, and revenue for each segment.
Chapter 13: South America, Middle East and Africa by type, by application and by country, sales, and revenue for each segment.
Chapter 14: Analysis of industrial chain, sales channel, key raw materials, distributors and customers.
Chapter 15: The main concluding insights of the report.
More report detail
Tables and figures
Scope & coverage.
Types
- Average Particle Size<2 um
- Average Particle Size 2-5 um
- Average Particle Size 5-9 um
- Average Particle Size >9 um
Applications
- Facial Care
- Body Care
- Hair Care
- Others
Companies covered
- ABC Nanotech
- EastHill
- Grant Industries
- Momentive Performance Materials
- Shin-Etsu
- Jiangxi XinJiaYi New Materials
- Guangzhou Batai Chemical
- Wacker
- The Innovation Company
Inside the report.
1 Market Overview
- 1.1 Product Definition
- 1.2 Polymethylsilsesquioxane Market by Type
- 1.2.1 Global Polymethylsilsesquioxane Market Size by Type, 2021 VS 2025 VS 2032
- 1.2.2 Average Particle Size<2 um
- 1.2.3 Average Particle Size 2-5 um
- 1.2.4 Average Particle Size 5-9 um
- 1.2.5 Average Particle Size >9 um
- 1.3 Polymethylsilsesquioxane Market by Application
- 1.3.1 Global Polymethylsilsesquioxane Market Size by Application, 2021 VS 2025 VS 2032
- 1.3.2 Facial Care
- 1.3.3 Body Care
- 1.3.4 Hair Care
- 1.3.5 Others
- 1.4 Assumptions and Limitations
- 1.5 Study Goals and Objectives
2 Polymethylsilsesquioxane Market Dynamics
- 2.1 Polymethylsilsesquioxane Industry Trends
- 2.2 Polymethylsilsesquioxane Industry Drivers
- 2.3 Polymethylsilsesquioxane Industry Opportunities and Challenges
- 2.4 Polymethylsilsesquioxane Industry Restraints
3 Global Polymethylsilsesquioxane Production Overview
- 3.1 Global Polymethylsilsesquioxane Production Capacity (2021-2032)
- 3.2 Global Polymethylsilsesquioxane Production by Region: 2021 VS 2025 VS 2032
- 3.3 Global Polymethylsilsesquioxane Production by Region
- 3.3.1 Global Polymethylsilsesquioxane Production by Region (2021-2026)
- 3.3.2 Global Polymethylsilsesquioxane Production by Region (2027-2032)
- 3.3.3 Global Polymethylsilsesquioxane Production Market Share by Region (2021-2032)
- 3.4 North America
- 3.5 Europe
- 3.6 China
- 3.7 Japan
4 Global Market Growth Prospects
- 4.1 Global Polymethylsilsesquioxane Revenue Estimates and Forecasts (2021-2032)
- 4.2 Global Polymethylsilsesquioxane Revenue by Region
- 4.2.1 Global Polymethylsilsesquioxane Revenue by Region: 2021 VS 2025 VS 2032
- 4.2.2 Global Polymethylsilsesquioxane Revenue by Region (2021-2026)
- 4.2.3 Global Polymethylsilsesquioxane Revenue by Region (2027-2032)
- 4.2.4 Global Polymethylsilsesquioxane Revenue Market Share by Region (2021-2032)
- 4.3 Global Polymethylsilsesquioxane Sales Estimates and Forecasts 2021-2032
- 4.4 Global Polymethylsilsesquioxane Sales by Region
- 4.4.1 Global Polymethylsilsesquioxane Sales by Region: 2021 VS 2025 VS 2032
- 4.4.2 Global Polymethylsilsesquioxane Sales by Region (2021-2026)
- 4.4.3 Global Polymethylsilsesquioxane Sales by Region (2027-2032)
- 4.4.4 Global Polymethylsilsesquioxane Sales Market Share by Region (2021-2032)
- 4.5 North America
- 4.6 Europe
- 4.7 China
- 4.8 Asia (Excluding China)
- 4.9 South America, Middle East and Africa
5 Market Competitive Landscape by Manufacturers
- 5.1 Global Polymethylsilsesquioxane Revenue by Manufacturers
- 5.1.1 Global Polymethylsilsesquioxane Revenue by Manufacturers (2021-2026)
- 5.1.2 Global Polymethylsilsesquioxane Revenue Market Share by Manufacturers (2021-2026)
- 5.1.3 Global Polymethylsilsesquioxane Manufacturers Revenue Share Top 10 and Top 5 in 2025
- 5.2 Global Polymethylsilsesquioxane Sales by Manufacturers
- 5.2.1 Global Polymethylsilsesquioxane Sales by Manufacturers (2021-2026)
- 5.2.2 Global Polymethylsilsesquioxane Sales Market Share by Manufacturers (2021-2026)
- 5.2.3 Global Polymethylsilsesquioxane Manufacturers Sales Share Top 10 and Top 5 in 2025
- 5.3 Global Polymethylsilsesquioxane Sales Price by Manufacturers (2021-2026)
- 5.4 Global Polymethylsilsesquioxane Key Manufacturers Ranking, 2024 VS 2025 VS 2026
- 5.5 Global Polymethylsilsesquioxane Key Manufacturers Manufacturing Sites & Headquarters
- 5.6 Global Polymethylsilsesquioxane Manufacturers, Product Type & Application
- 5.7 Global Polymethylsilsesquioxane Manufacturers Commercialization Time
- 5.8 Market Competitive Analysis
- 5.8.1 Global Polymethylsilsesquioxane Market CR5 and HHI
- 5.8.2 2025 Polymethylsilsesquioxane Tier 1, Tier 2, and Tier 3
6 Polymethylsilsesquioxane Market by Type
- 6.1 Global Polymethylsilsesquioxane Revenue by Type
- 6.1.1 Global Polymethylsilsesquioxane Revenue by Type (2021-2032) & (US$ Million)
- 6.1.2 Global Polymethylsilsesquioxane Revenue Market Share by Type (2021-2032)
- 6.2 Global Polymethylsilsesquioxane Sales by Type
- 6.2.1 Global Polymethylsilsesquioxane Sales by Type (2021-2032) & (Tons)
- 6.2.2 Global Polymethylsilsesquioxane Sales Market Share by Type (2021-2032)
- 6.3 Global Polymethylsilsesquioxane Price by Type
7 Polymethylsilsesquioxane Market by Application
- 7.1 Global Polymethylsilsesquioxane Revenue by Application
- 7.1.1 Global Polymethylsilsesquioxane Revenue by Application (2021-2032) & (US$ Million)
- 7.1.2 Global Polymethylsilsesquioxane Revenue Market Share by Application (2021-2032)
- 7.2 Global Polymethylsilsesquioxane Sales by Application
- 7.2.1 Global Polymethylsilsesquioxane Sales by Application (2021-2032) & (Tons)
- 7.2.2 Global Polymethylsilsesquioxane Sales Market Share by Application (2021-2032)
- 7.3 Global Polymethylsilsesquioxane Price by Application
8 Company Profiles
- 8.1 ABC Nanotech
- 8.1.1 ABC Nanotech Company Information
- 8.1.2 ABC Nanotech Business Overview
- 8.1.3 ABC Nanotech Polymethylsilsesquioxane Sales, Revenue, Price and Gross Margin (2021-2026)
- 8.1.4 ABC Nanotech Polymethylsilsesquioxane Product Portfolio
- 8.1.5 ABC Nanotech Recent Developments
- 8.2 EastHill
- 8.2.1 EastHill Company Information
- 8.2.2 EastHill Business Overview
- 8.2.3 EastHill Polymethylsilsesquioxane Sales, Revenue, Price and Gross Margin (2021-2026)
- 8.2.4 EastHill Polymethylsilsesquioxane Product Portfolio
- 8.2.5 EastHill Recent Developments
- 8.3 Grant Industries
- 8.3.1 Grant Industries Company Information
- 8.3.2 Grant Industries Business Overview
- 8.3.3 Grant Industries Polymethylsilsesquioxane Sales, Revenue, Price and Gross Margin (2021-2026)
- 8.3.4 Grant Industries Polymethylsilsesquioxane Product Portfolio
- 8.3.5 Grant Industries Recent Developments
- 8.4 Momentive Performance Materials
- 8.4.1 Momentive Performance Materials Company Information
- 8.4.2 Momentive Performance Materials Business Overview
- 8.4.3 Momentive Performance Materials Polymethylsilsesquioxane Sales, Revenue, Price and Gross Margin (2021-2026)
- 8.4.4 Momentive Performance Materials Polymethylsilsesquioxane Product Portfolio
- 8.4.5 Momentive Performance Materials Recent Developments
- 8.5 Shin-Etsu
- 8.5.1 Shin-Etsu Company Information
- 8.5.2 Shin-Etsu Business Overview
- 8.5.3 Shin-Etsu Polymethylsilsesquioxane Sales, Revenue, Price and Gross Margin (2021-2026)
- 8.5.4 Shin-Etsu Polymethylsilsesquioxane Product Portfolio
- 8.5.5 Shin-Etsu Recent Developments
- 8.6 Jiangxi XinJiaYi New Materials
- 8.6.1 Jiangxi XinJiaYi New Materials Company Information
- 8.6.2 Jiangxi XinJiaYi New Materials Business Overview
- 8.6.3 Jiangxi XinJiaYi New Materials Polymethylsilsesquioxane Sales, Revenue, Price and Gross Margin (2021-2026)
- 8.6.4 Jiangxi XinJiaYi New Materials Polymethylsilsesquioxane Product Portfolio
- 8.6.5 Jiangxi XinJiaYi New Materials Recent Developments
- 8.7 Guangzhou Batai Chemical
- 8.7.1 Guangzhou Batai Chemical Company Information
- 8.7.2 Guangzhou Batai Chemical Business Overview
- 8.7.3 Guangzhou Batai Chemical Polymethylsilsesquioxane Sales, Revenue, Price and Gross Margin (2021-2026)
- 8.7.4 Guangzhou Batai Chemical Polymethylsilsesquioxane Product Portfolio
- 8.7.5 Guangzhou Batai Chemical Recent Developments
- 8.8 Wacker
- 8.8.1 Wacker Company Information
- 8.8.2 Wacker Business Overview
- 8.8.3 Wacker Polymethylsilsesquioxane Sales, Revenue, Price and Gross Margin (2021-2026)
- 8.8.4 Wacker Polymethylsilsesquioxane Product Portfolio
- 8.8.5 Wacker Recent Developments
- 8.9 The Innovation Company
- 8.9.1 The Innovation Company Company Information
- 8.9.2 The Innovation Company Business Overview
- 8.9.3 The Innovation Company Polymethylsilsesquioxane Sales, Revenue, Price and Gross Margin (2021-2026)
- 8.9.4 The Innovation Company Polymethylsilsesquioxane Product Portfolio
- 8.9.5 The Innovation Company Recent Developments
9 North America
- 9.1 North America Polymethylsilsesquioxane Market Size by Type
- 9.1.1 North America Polymethylsilsesquioxane Revenue by Type (2021-2032)
- 9.1.2 North America Polymethylsilsesquioxane Sales by Type (2021-2032)
- 9.1.3 North America Polymethylsilsesquioxane Price by Type (2021-2032)
- 9.2 North America Polymethylsilsesquioxane Market Size by Application
- 9.2.1 North America Polymethylsilsesquioxane Revenue by Application (2021-2032)
- 9.2.2 North America Polymethylsilsesquioxane Sales by Application (2021-2032)
- 9.2.3 North America Polymethylsilsesquioxane Price by Application (2021-2032)
- 9.3 North America Polymethylsilsesquioxane Market Size by Country
- 9.3.1 North America Polymethylsilsesquioxane Revenue Grow Rate by Country (2021 VS 2025 VS 2032)
- 9.3.2 North America Polymethylsilsesquioxane Sales by Country (2021 VS 2025 VS 2032)
- 9.3.3 North America Polymethylsilsesquioxane Price by Country (2021-2032)
- 9.3.4 United States
- 9.3.5 Canada
10 Europe
- 10.1 Europe Polymethylsilsesquioxane Market Size by Type
- 10.1.1 Europe Polymethylsilsesquioxane Revenue by Type (2021-2032)
- 10.1.2 Europe Polymethylsilsesquioxane Sales by Type (2021-2032)
- 10.1.3 Europe Polymethylsilsesquioxane Price by Type (2021-2032)
- 10.2 Europe Polymethylsilsesquioxane Market Size by Application
- 10.2.1 Europe Polymethylsilsesquioxane Revenue by Application (2021-2032)
- 10.2.2 Europe Polymethylsilsesquioxane Sales by Application (2021-2032)
- 10.2.3 Europe Polymethylsilsesquioxane Price by Application (2021-2032)
- 10.3 Europe Polymethylsilsesquioxane Market Size by Country
- 10.3.1 Europe Polymethylsilsesquioxane Revenue Grow Rate by Country (2021 VS 2025 VS 2032)
- 10.3.2 Europe Polymethylsilsesquioxane Sales by Country (2021 VS 2025 VS 2032)
- 10.3.3 Europe Polymethylsilsesquioxane Price by Country (2021-2032)
- 10.3.4 Germany
- 10.3.5 France
- 10.3.6 U.K.
- 10.3.7 Italy
- 10.3.8 Netherlands
11 China
- 11.1 China Polymethylsilsesquioxane Market Size by Type
- 11.1.1 China Polymethylsilsesquioxane Revenue by Type (2021-2032)
- 11.1.2 China Polymethylsilsesquioxane Sales by Type (2021-2032)
- 11.1.3 China Polymethylsilsesquioxane Price by Type (2021-2032)
- 11.2 China Polymethylsilsesquioxane Market Size by Application
- 11.2.1 China Polymethylsilsesquioxane Revenue by Application (2021-2032)
- 11.2.2 China Polymethylsilsesquioxane Sales by Application (2021-2032)
- 11.2.3 China Polymethylsilsesquioxane Price by Application (2021-2032)
12 Asia (Excluding China)
- 12.1 Asia Polymethylsilsesquioxane Market Size by Type
- 12.1.1 Asia Polymethylsilsesquioxane Revenue by Type (2021-2032)
- 12.1.2 Asia Polymethylsilsesquioxane Sales by Type (2021-2032)
- 12.1.3 Asia Polymethylsilsesquioxane Price by Type (2021-2032)
- 12.2 Asia Polymethylsilsesquioxane Market Size by Application
- 12.2.1 Asia Polymethylsilsesquioxane Revenue by Application (2021-2032)
- 12.2.2 Asia Polymethylsilsesquioxane Sales by Application (2021-2032)
- 12.2.3 Asia Polymethylsilsesquioxane Price by Application (2021-2032)
- 12.3 Asia Polymethylsilsesquioxane Market Size by Country
- 12.3.1 Asia Polymethylsilsesquioxane Revenue Grow Rate by Country (2021 VS 2025 VS 2032)
- 12.3.2 Asia Polymethylsilsesquioxane Sales by Country (2021 VS 2025 VS 2032)
- 12.3.3 Asia Polymethylsilsesquioxane Price by Country (2021-2032)
- 12.3.4 Japan
- 12.3.5 South Korea
- 12.3.6 India
- 12.3.7 Australia
- 12.3.8 Taiwan
- 12.3.9 Southeast Asia
13 South America, Middle East and Africa
- 13.1 SAMEA Polymethylsilsesquioxane Market Size by Type
- 13.1.1 SAMEA Polymethylsilsesquioxane Revenue by Type (2021-2032)
- 13.1.2 SAMEA Polymethylsilsesquioxane Sales by Type (2021-2032)
- 13.1.3 SAMEA Polymethylsilsesquioxane Price by Type (2021-2032)
- 13.2 SAMEA Polymethylsilsesquioxane Market Size by Application
- 13.2.1 SAMEA Polymethylsilsesquioxane Revenue by Application (2021-2032)
- 13.2.2 SAMEA Polymethylsilsesquioxane Sales by Application (2021-2032)
- 13.2.3 SAMEA Polymethylsilsesquioxane Price by Application (2021-2032)
- 13.3 SAMEA Polymethylsilsesquioxane Market Size by Country
- 13.3.1 SAMEA Polymethylsilsesquioxane Revenue Grow Rate by Country (2021 VS 2025 VS 2032)
- 13.3.2 SAMEA Polymethylsilsesquioxane Sales by Country (2021 VS 2025 VS 2032)
- 13.3.3 SAMEA Polymethylsilsesquioxane Price by Country (2021-2032)
- 13.3.4 Brazil
- 13.3.5 Argentina
- 13.3.6 Chile
- 13.3.7 Colombia
- 13.3.8 Peru
- 13.3.9 Saudi Arabia
- 13.3.10 Israel
- 13.3.11 UAE
- 13.3.12 Turkey
- 13.3.13 Iran
- 13.3.14 Egypt
14 Value Chain and Sales Channels Analysis
- 14.1 Polymethylsilsesquioxane Value Chain Analysis
- 14.1.1 Polymethylsilsesquioxane Key Raw Materials
- 14.1.2 Raw Materials Key Suppliers
- 14.1.3 Manufacturing Cost Structure
- 14.1.4 Polymethylsilsesquioxane Production Mode & Process
- 14.2 Polymethylsilsesquioxane Sales Channels Analysis
- 14.2.1 Direct Comparison with Distribution Share
- 14.2.2 Polymethylsilsesquioxane Distributors
- 14.2.3 Polymethylsilsesquioxane Customers
15 Concluding Insights
16 Appendix
- 16.1 Reasons for Doing This Study
- 16.2 Research Methodology
- 16.3 Research Process
- 16.4 Authors List of This Report
- 16.5 Data Source
- 16.5.1 Secondary Sources
- 16.5.2 Primary Sources
- 16.6 Disclaimer
GET THE RESEARCH
Choose your license.
Choose who needs access.
All options are for this report and research series.
PDF by email within 3–5 working days after payment confirmation.
Talk to an analyst