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Trinseo (TSE) Institutional Ownership

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$0.23 0.00 (0.00%)
As of 10/7/2026
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Institutional Ownership Changes (13F Filings) for Trinseo (NYSE:TSE)

Current
Institutional Ownership
Percentage
82.69%
Number of
Institutional Buyers
(last 12 months)
11
Total
Institutional Inflows
(last 12 months)
$2.33M
Number of
Institutional Sellers
(last 12 months)
8
Total
Institutional Outflows
(last 12 months)
$3.79M
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TSE Institutional Buying and Selling by Quarter

Trinseo Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
7/7/2026GAMMA Investing LLC412,655$95K0.0%+19,111.1%1.172%
2/19/2026Invesco Ltd.70,320$35K0.0%-46.6%0.200%
2/18/2026CastleKnight Management LP516,826$257K0.0%-79.0%1.468%
2/13/2026Charles Schwab Investment Management Inc.2,091,125$1.04M0.0%+38.9%5.941%
2/13/2026State Street Corp478,033$238K0.0%+12.8%1.358%
2/12/2026Renaissance Technologies LLC276,100$137K0.0%-12.3%0.784%
2/11/2026Deutsche Bank AG125,610$63K0.0%+336.4%0.357%
2/10/2026Goldman Sachs Group Inc.580,623$289K0.0%+360.8%1.649%
1/1/2026JPMorgan Chase & Co.26,323$62K0.0%-92.8%0.075%
11/17/2025Icon Advisers Inc. Co.1,000,000$2.35M0.5%+33.3%2.841%
11/17/2025Voleon Capital Management LP82,074$193K0.0%N/A0.233%
11/17/2025Susquehanna International Group LLP11,703$28K0.0%-85.5%0.033%
11/17/2025Bank of America Corp DE363,641$855K0.0%+20.0%1.033%
11/14/2025Two Sigma Investments LP35,714$84K0.0%-73.6%0.101%
11/13/2025BNP Paribas Financial Markets23,454$55K0.0%-43.6%0.067%
11/13/2025Brightline Capital Management LLC1,060,000$2.49M1.0%+3.7%3.011%
11/13/2025Russell Investments Group Ltd.13,276$31K0.0%+2,181.1%0.038%
11/12/2025Icon Advisers Inc. Co.1,000,000$2.35M0.5%+33.3%2.841%
11/7/2025Vanguard Group Inc.755,643$1.78M0.0%-29.8%2.102%
11/7/2025JPMorgan Chase & Co.26,323$62K0.0%-92.8%0.073%
10/31/2025PFG Investments LLC23,004$54K0.0%+64.3%0.064%
8/15/2025Sugar Maple Asset Management LLC13,000$41K0.0%N/A0.036%
8/15/2025Owl Creek Asset Management L.P.1,669,952$5.21M0.2%+337.0%4.645%
8/15/2025Engineers Gate Manager LP72,806$227K0.0%+625.5%0.203%
8/15/2025BNP Paribas Financial Markets41,586$130K0.0%+80.2%0.116%
8/15/2025Bank of America Corp DE302,965$945K0.0%-2.7%0.843%
8/14/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.18,600$58K0.0%N/A0.052%
8/13/2025Marshall Wace LLP190,397$594K0.0%-77.9%0.530%
8/13/2025Invesco Ltd.195,259$609K0.0%-23.6%0.543%
8/13/2025Icon Advisers Inc. Co.750,000$2.34M0.5%N/A2.086%
8/13/2025New York State Common Retirement Fund29,500$92K0.0%N/A0.082%
8/12/2025JPMorgan Chase & Co.364,444$1.14M0.0%-6.5%1.014%
8/8/2025Intech Investment Management LLC15,514$48K0.0%N/A0.044%
8/8/2025Police & Firemen s Retirement System of New Jersey8,769$27K0.0%N/A0.025%
8/8/2025Geode Capital Management LLC823,044$2.57M0.0%+105.8%2.309%
8/7/2025Los Angeles Capital Management LLC34,760$108K0.0%N/A0.098%
8/1/2025May Hill Capital LLC10,594$33K0.0%N/A0.030%
6/27/2025Goldman Sachs Group Inc.343,604$1.26M0.0%+43.0%0.964%
5/21/2025Acadian Asset Management LLC329,306$1.21M0.0%+267.9%0.924%
5/19/2025Jane Street Group LLC267,745$985K0.0%-19.0%0.751%
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5/16/2025Goldman Sachs Group Inc.343,604$1.26M0.0%+43.0%0.964%
5/16/2025Dynamic Technology Lab Private Ltd32,107$118K0.0%N/A0.090%
5/15/2025Cubist Systematic Strategies LLC50,656$186K0.0%-15.1%0.142%
5/15/2025OMERS ADMINISTRATION Corp72,200$266K0.0%+11.6%0.203%
5/14/2025Jump Financial LLC45,802$169K0.0%-15.7%0.128%
5/14/2025Brightline Capital Management LLC1,016,000$3.74M3.2%+7.5%2.850%
5/12/2025Kohmann Bosshard Financial Services LLC44,605$164K0.0%+28.9%0.125%
5/12/2025Alta Fundamental Advisers LLC53,618$197K0.1%-86.3%0.150%
5/12/2025Invesco Ltd.255,668$941K0.0%-18.7%0.717%
5/9/2025Charles Schwab Investment Management Inc.362,646$1.34M0.0%-31.2%1.017%
3/17/2025NorthCrest Asset Manangement LLC11,800$60K0.0%-35.5%0.033%
2/27/2025Jefferies Financial Group Inc.30,000$153K0.0%+14.5%0.085%
2/18/2025PharVision Advisers LLC58,413$298K0.3%N/A0.165%
2/17/2025Squarepoint Ops LLC10,918$56K0.0%-72.6%0.031%
2/17/2025Two Sigma Advisers LP204,400$1.04M0.0%-9.1%0.577%
2/17/2025Two Sigma Investments LP326,592$1.67M0.0%+2.7%0.923%
2/17/2025State of Wyoming10,373$53K0.0%N/A0.029%
2/17/2025Point72 Asia Singapore Pte. Ltd.36,965$189K0.0%+33.5%0.104%
2/17/2025Man Group plc18,778$96K0.0%N/A0.053%
2/17/2025OMERS ADMINISTRATION Corp64,700$330K0.0%N/A0.183%
2/17/2025Millennium Management LLC178,244$909K0.0%-61.0%0.504%
2/17/2025Jefferies Financial Group Inc.30,000$153K0.0%+14.5%0.085%
2/17/2025D. E. Shaw & Co. Inc.581,795$2.97M0.0%-32.6%1.643%
2/17/2025Cubist Systematic Strategies LLC59,639$304K0.0%-33.4%0.168%
2/17/2025CastleKnight Management LP2,479,618$12.65M0.4%+128.1%7.005%
2/17/2025Cetera Investment Advisers15,991$82K0.0%N/A0.045%
2/17/2025Bank of America Corp DE335,947$1.71M0.0%+3.9%0.949%
2/17/2025BNP Paribas Financial Markets14,493$74K0.0%N/A0.041%
2/17/2025Alta Fundamental Advisers LLC390,500$1.99M0.6%-0.7%1.103%
2/17/2025683 Capital Management LLC124,763$636K0.0%N/A0.352%
2/14/2025Jane Street Group LLC330,467$1.69M0.0%+32.4%0.934%
2/14/2025Schonfeld Strategic Advisors LLC49,645$253K0.0%N/A0.140%
2/14/2025Tudor Investment Corp ET AL16,688$85K0.0%-11.2%0.047%
2/14/2025Quarry LP15,571$79K0.0%N/A0.044%
2/14/2025Boothbay Fund Management LLC19,464$99K0.0%N/A0.055%
2/14/2025Susquehanna Fundamental Investments LLC15,742$80K0.0%N/A0.044%
2/14/2025Two Sigma Securities LLC11,871$61K0.0%-15.7%0.034%
2/14/2025Dimensional Fund Advisors LP41,224$210K0.0%N/A0.116%
2/13/2025Marshall Wace LLP618,192$3.15M0.0%+1.7%1.746%
2/13/2025Jump Financial LLC54,324$277K0.0%N/A0.153%
2/13/2025XTX Topco Ltd52,710$269K0.0%-40.3%0.149%
2/13/2025Barclays PLC48,352$247K0.0%+48.5%0.137%
2/13/2025Brightline Capital Management LLC945,000$4.82M3.8%N/A2.669%
2/13/2025Covestor Ltd7,144$36K0.0%N/A0.020%
2/13/2025Renaissance Technologies LLC229,300$1.17M0.0%+18.1%0.648%
2/13/2025Invesco Ltd.314,658$1.61M0.0%+0.9%0.889%
2/12/2025Geode Capital Management LLC388,751$1.98M0.0%+0.7%1.098%
2/12/2025JPMorgan Chase & Co.229,503$1.17M0.0%-46.7%0.648%
2/11/2025LPL Financial LLC19,936$102K0.0%N/A0.056%
2/11/2025Truffle Hound Capital LLC350,000$1.79M0.6%N/A0.989%
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2/11/2025Virtu Financial LLC32,587$166K0.0%N/A0.092%
2/10/2025Thrivent Financial for Lutherans116,248$593K0.0%-28.8%0.328%
2/6/2025Charles Schwab Investment Management Inc.526,924$2.69M0.0%-48.6%1.488%
1/30/2025Rhumbline Advisers7,879$40K0.0%+103.2%0.022%
1/17/2025SG Americas Securities LLC10,097$51K0.0%N/A0.029%
12/26/2024JPMorgan Chase & Co.430,340$2.20M0.0%+10.4%1.216%
11/19/2024Barclays PLC32,566$167K0.0%-81.5%0.092%
11/16/2024Geode Capital Management LLC385,931$1.97M0.0%+4.0%1.090%
11/15/2024Barclays PLC32,566$167K0.0%-81.5%0.092%
11/15/2024Public Employees Retirement System of Ohio12,202$62K0.0%-66.8%0.034%


TSE Institutional Ownership - Frequently Asked Questions

During the previous two years, 70 institutional investors and hedge funds held shares of Trinseo. The most heavily invested institutionals were Owl Creek Asset Management L.P. ($5.21M), D. E. Shaw & Co. Inc. ($2.97M), Geode Capital Management LLC ($2.57M), Brightline Capital Management LLC ($2.49M), Icon Advisers Inc. Co. ($2.35M), Truffle Hound Capital LLC ($1.79M), and Vanguard Group Inc. ($1.78M).Learn more on Trinseo's institutional investors.

82.69% of Trinseo's stock is owned by institutional investors. Learn more on TSE's institutional investor holdings.

Of the 56 institutional investors that purchased Trinseo's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: CastleKnight Management LP ($1.39M), Owl Creek Asset Management L.P. ($1.29M), Icon Advisers Inc. Co. ($1.25M), Brightline Capital Management LLC ($1.05M), Goldman Sachs Group Inc. ($661.22K), Charles Schwab Investment Management Inc. ($586.06K), and Geode Capital Management LLC ($440.81K).

Institutional investors have bought a total of 2,304,712 shares in the last 24 months. This purchase volume represents approximately $2.33M in transactions.

The following institutional investors have sold Trinseo stock in the last 24 months: CastleKnight Management LP ($1.95M), JPMorgan Chase & Co. ($676.24K), Vanguard Group Inc. ($321.01K), Two Sigma Investments LP ($99.42K), Susquehanna International Group LLP ($69.28K), Invesco Ltd. ($61.48K), and Renaissance Technologies LLC ($38.60K).

Institutional investors have sold a total of 3,234,168 shares in the last 24 months. This volume of shares sold represents approximately $3.79M in transactions.


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Institutional ownership data for NYSE:TSE is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 7/7/2026. New 13F filings are added each quarter as they're published.
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