StockData
Trinseo PLC logo

Trinseo PLC (TSEOQ) stock

TSEOQOTCPlastic Materials, Synth Resins & Nonvulcan ElastomersFiscal year ends December 31
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 6, 2026Score 2/30
$0.00+0.00 (+14.29%)

Close on Oct 19, 2026Market cap $146.40KP/E –Yield 500.00%

Price history

Trinseo share prices for every week, newest first. Adjusted for stock splits, not for dividends.

Download all as CSV
Close, Oct 19, 2026
$0.004
+14.29% on the day
52-week range
$0.0014 – $1.94
-99.8% from the high
Change over 52 weeks
-99.8%
From $1.88 on Oct 17, 2025
Average volume
5,936
Shares a day, last 90 sessions
Week ofOpenHighLowCloseChangeVolume
Oct 19, 2026$0.004$0.004$0.004$0.004+14.29%0
Oct 12, 2026$0.004$0.004$0.0035$0.00350.00%280
Oct 5, 2026$0.013$0.013$0.0035$0.0035-73.08%9,204
Sep 28, 2026$0.013$0.013$0.013$0.0130.00%0
Sep 21, 2026$0.013$0.013$0.013$0.0130.00%0
Sep 14, 2026$0.013$0.013$0.013$0.0130.00%0
Sep 8, 2026$0.013$0.013$0.013$0.0130.00%0
Aug 31, 2026$0.013$0.013$0.013$0.0130.00%769
Aug 24, 2026$0.003$0.013$0.003$0.013+333.33%2,625
Aug 17, 2026$0.002$0.003$0.002$0.003+50.00%1,883
Aug 10, 2026$0.002$0.002$0.002$0.0020.00%20,555
Aug 3, 2026$0.002$0.002$0.0016$0.002+25.00%13,131
Jul 27, 2026$0.0014$0.002$0.0014$0.0016-20.00%28,124
Jul 20, 2026$0.003$0.003$0.002$0.002-20.00%29,517
Jul 13, 2026$0.002$0.013$0.002$0.0025+25.00%72,383
Jul 6, 2026$0.002$0.002$0.002$0.0020.00%0
Jun 29, 2026$0.002$0.002$0.002$0.002+25.00%0
Jun 22, 2026$0.013$0.09$0.0016$0.0016-87.69%85,622
Jun 15, 2026$0.0018$0.015$0.0018$0.013+550.00%264,363
Jun 8, 2026$0.003$0.003$0.0018$0.002-33.33%5,814
Jun 1, 2026$0.01$0.01$0.0016$0.003-70.00%14,007
May 26, 2026$0.013$0.013$0.01$0.01-33.33%23,867
May 18, 2026$0.15$0.24$0.015$0.015-90.00%7,700
May 11, 2026$0.10$0.25$0.013$0.15+50.00%149,100
May 4, 2026$0.10$0.105$0.10$0.100.00%44,000
Apr 27, 2026$0.10$0.14$0.10$0.100.00%119,200
Apr 20, 2026$0.10$0.125$0.10$0.10-9.09%40,300
Apr 13, 2026$0.11$0.16$0.10$0.11+2.80%386,900
Apr 6, 2026$0.22$0.22$0.101$0.107-57.20%440,700
Mar 30, 2026$0.105$0.25$0.105$0.25+138.10%581,800
Mar 23, 2026$0.11$0.20$0.025$0.105-4.55%882,600
Mar 16, 2026$0.10$0.20$0.061$0.110.00%1,163,300
Mar 9, 2026$0.02$0.189$0.02$0.11+685.71%3,115,300
Mar 2, 2026$0.23$0.23$0.003$0.014-93.91%8,134,400
Feb 23, 2026$0.30$0.318$0.23$0.23-29.88%5,466,900
Feb 17, 2026$0.40$0.413$0.273$0.328-16.11%3,749,500
Feb 9, 2026$0.47$0.506$0.371$0.391-16.63%2,655,500
Feb 2, 2026$0.43$0.47$0.416$0.469+4.22%2,235,600
Jan 26, 2026$0.48$0.50$0.431$0.45-5.26%2,776,500
Jan 20, 2026$0.50$0.50$0.43$0.475-4.43%4,240,900
Jan 12, 2026$0.75$0.75$0.497$0.497-37.09%5,619,100
Jan 5, 2026$0.626$0.95$0.562$0.79+22.67%8,218,400
Dec 29, 2025$0.532$0.644$0.47$0.644+17.09%5,326,900
Dec 22, 2025$0.50$0.62$0.451$0.55+10.00%11,300,200
Dec 15, 2025$0.629$0.629$0.46$0.50-20.89%5,931,300
Dec 8, 2025$0.669$0.76$0.599$0.632-5.11%4,612,900
Dec 1, 2025$0.95$0.96$0.646$0.666-31.62%3,148,400
Nov 24, 2025$0.82$0.992$0.781$0.974+22.98%2,168,400
Nov 17, 2025$0.96$1.03$0.735$0.792-18.69%2,957,800
Nov 10, 2025$1.24$1.32$0.961$0.974-20.81%2,129,300
Nov 3, 2025$1.46$1.49$1.15$1.23-15.75%1,869,400
Oct 27, 2025$1.62$1.74$1.32$1.46-9.32%3,472,300

Seasonality

TSEOQ return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average-2.0%-6.6%-15.2%-2.9%-11.5%-11.4%1.7%68.6%-0.6%-13.1%-2.7%4.3%
Months up5 of 104 of 100 of 103 of 103 of 105 of 104 of 104 of 106 of 104 of 103 of 94 of 9
2026-9.5%-48.9%-54.3%-4.8%-90.0%-80.0%-20.0%712.5%0.0%-69.2%
2025-18.6%18.8%-25.2%8.5%-23.9%3.0%-14.1%-10.1%-2.1%-37.9%-33.3%-49.0%
2024-27.9%-25.4%-16.0%-30.8%46.7%-39.7%25.7%50.5%17.5%-9.4%-6.3%17.8%
202323.9%-16.5%-10.1%-12.5%-31.5%2.0%39.2%-40.2%-22.4%-24.1%-6.6%44.8%
20222.6%-3.0%-7.8%-0.3%-0.3%-18.7%-6.2%-25.8%-30.9%4.4%31.0%-7.9%
2021-0.6%27.3%-1.6%-2.6%4.9%-7.9%-9.0%-4.5%4.6%3.9%-15.8%11.1%
2020-21.9%-23.8%-17.2%15.1%0.6%7.7%-0.3%14.8%2.9%25.9%19.4%34.8%
20198.0%2.3%-9.7%0.1%-18.0%14.9%-7.4%-9.6%22.4%-0.0%-10.6%-2.1%
201814.1%-3.5%-7.0%-1.0%-0.9%-1.9%5.9%3.3%1.5%-30.8%-6.2%-9.4%
20179.7%6.8%-3.0%-0.6%-2.9%6.6%2.9%-4.8%0.3%6.4%3.9%-1.6%