Trinseo (TSE) - Shares outstanding

Number of shares outstanding as of December 2025 : 36,000,000

According to Trinseo's latest financial reports and stock price the company's current number of shares outstanding is 36,000,000. At the end of 2025 the company had 36,000,000 shares outstanding. The number of outstanding shares is usually impacted by stock plits and shares buy back.

Shares outstanding history for Trinseo from 2010 to 2025

Shares Outstanding at the end of each year

Year	Shares Outstanding	Change
2025	36 M	1.69%
2024	35.4 M	0.57%
2023	35.2 M	0.57%
2022	35 M	-9.56%
2021	38.7 M	1.04%
2020	38.3 M	-2.3%
2019	39.2 M	-7.11%
2018	42.2 M	-3.43%
2017	43.7 M	-2.01%
2016	44.59 M	-8.58%
2015	48.77 M	0.02%
2014	48.77 M	3.17%
2013	47.26 M
2011	47.26 M	0%
2010	47.26 M

Shares Outstanding for similar companies or competitors

Company	Shares Outstanding	differencediff.	Country
Kraton KRA	31,854,500	-11.52%	🇺🇸 USA
Dow DOW	711,800,000	1,877.22%	🇺🇸 USA
Westlake Chemical WLK	128,251,427	256.25%	🇺🇸 USA
Celanese CE	109,565,996	204.35%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Number of shares outstanding for Trinseo (TSE)

Number of shares outstanding as of December 2025 : 36,000,000