NYSE: TSE
Trinseo PLC Stock Ownership - Who owns Trinseo?

Insider buying vs selling

Have Trinseo PLC insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Matthew FarrellDirector2025-08-1448,609$2.43
$118.12kBuy
Matthew FarrellDirector2025-08-1326,391$2.45
$64.66kBuy
Matthew FarrellDirector2025-08-1225,000$2.29
$57.25kBuy
Victoria BrifoDirector2025-06-219,576$3.73
$35.72kSell
Sandra Beach LinDirector2025-06-2110,310$3.73
$38.46kSell
Klynne JohnsonDirector2025-06-2110,474$3.73
$39.07kSell
Mark E. TomkinsDirector2025-06-2110,105$3.73
$37.69kSell
Matthew FarrellDirector2025-06-219,576$3.73
$35.72kSell
Henri SteinmetzDirector2025-06-2120,001$3.73
$74.60kSell
Joseph AlvaradoDirector2025-06-2110,327$3.73
$38.52kSell

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Net Insider Buy/Sell (L12M) Ownership

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TSE Shareholders

What type of owners hold Trinseo PLC stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Brian Chu207.34%74,542,370$178.90MInsider
Felix Hauser133.35%47,941,031$115.06MInsider
Aurelien Vasseur133.34%47,939,134$115.05MInsider
Stephen M. Zide103.76%37,305,848$89.53MInsider
Michel Plantevin103.68%37,274,052$89.46MInsider
Seth Meisel103.67%37,272,803$89.45MInsider
Stephen F. Thomas103.67%37,271,464$89.45MInsider
Mg Investment Management Ltd64.24%23,095,132$55.43MInsider
Mg PLC21.21%7,625,044$18.30MInstitution
Nut Tree Capital Management LP9.74%3,500,000$8.40MInstitution

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TSE vs Specialty Chemical Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
TSE7.40%92.60%Net SellingNet Selling
ALTO22.06%21.42%Net SellingNet Buying
LOOP2.92%97.08%Net BuyingNet Buying
NTIC21.22%78.78%Net BuyingNet Buying
FEAM19.22%80.78%Net BuyingNet Buying

Trinseo Stock Ownership FAQ

Who owns Trinseo?

Trinseo (NYSE: TSE) is owned by 76.99% institutional shareholders, 963.12% Trinseo insiders, and 0.00% retail investors. Brian Chu is the largest individual Trinseo shareholder, owning 74.54M shares representing 207.34% of the company. Brian Chu's Trinseo shares are currently valued at $178.90M.

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