Trinseo PLC (OTC:TSEOQ) appeared in the 13F filings of 6 institutional investors for the quarter ended June 30, 2026.
Together they owned 1.26% of the outstanding stock in Q2 2026, up from 0.27% a quarter earlier.
Total shares held in Trinseo rose 359.98% from Q1 2026, while the number of holders fell 92.31% from Q2 2025.
Looking at the 6 holders of TSEOQ individually, 2 added to their positions, 1 reduced its stake and 3 left their positions unchanged.
Altogether, institutional holders owned 462.69K TSEOQ shares at the end of Q2 2026, up 362.1K from the prior quarter and down 26.75Mn from a year earlier.
GAMMA Investing LLC held the largest position in TSEOQ at 412.65K shares as of June 30, 2026, or 1.13% of shares outstanding.
The largest position increases in TSEOQ for Q2 2026 were by GAMMA Investing LLC (+410.51K shares) and EverSource Wealth Advisors, LLC (+4.34K shares).
Among holders that kept a stake in Trinseo, the biggest seller in Q2 2026 was Essential Partners LLC (-36 shares).
Per Business Quant, the top 6 investors in TSEOQ for the quarter ended June 30, 2026 were GAMMA Investing LLC (412.65K shares), Kohmann Bosshard Financial Services, LLC (44.6K shares), EverSource Wealth Advisors, LLC (5.38K shares), Essential Partners LLC (30 shares), Farther Finance Advisors, LLC (15 shares) and Rothschild Investment LLC (7 shares).