Security key
G9059U107
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 24,748,809
- Total 13F value
- $12,300,686
- Share change
- -1,835,734
- SEC-reported price per share
- $0.50
- Number of holders
- 71
- Value change
- -$9,970,261
- Number of buys
- 26
- Number of sells
- 35
- Shares outstanding
- 36,916,143
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
71
Top holders
10
TSE full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Trinseo PLC SEC filings
Trinseo PLC company facts
Broader feeds
Reporting periods
Holder history for CUSIP G9059U107
Recent filing periods:
Ownership snapshot
Top reported holders of TSE - TRINSEO PLC - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
CHARLES SCHWAB INVESTMENT...
Disclosed value leader
M&G INVESTMENT MANAGEMENT...
Comparable rows
2/15
Latest evidence
31 Dec 2025
13F
13D/G
3/4/5
Lead comparable stake: 5.8%
13 rows are not safely comparable across share classes.
13D/G row: CHARLES SCHWAB INVESTMENT MANAGEMENT INC
Showing 1-6 of 15 holder rows.
Quick read
CHARLES SCHWAB INVESTMENT MANAGEMENT INC leads the comparable SEC ownership view at 5.8%.
2 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens CHARLES SCHWAB INVESTMENT MANAGEMENT INC's linked filing trail.
Comparable ownership
Top 2
CHARLES SCHWAB INVESTMENT MANAGEM...
5.8%
CastleKnight Master Fund LP
1.4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
13D/G
Company
|
5.8%
Reported 13D/G
· 31 Dec 2025
|
$3,536,910
1,505,068 shares
|
— | 30 Sep 2025 |
| CastleKnight Master Fund LP |
13D/G
|
1.4%
Reported 13D/G
· 31 Dec 2025
|
$418,629
516,826 shares
|
-$1,822,014 | 31 Dec 2025 |
| M&G INVESTMENT MANAGEMENT LTD |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$54,976,567
7,625,044 shares
|
— | 19 Jul 2022 |
| M&G Plc |
13F
Company
|
—
denominator unverified
|
$15,250,088
7,625,044 shares
|
— | 30 Sep 2025 |
| Nut Tree Capital Management, LP |
13F
Company
|
—
denominator unverified
|
$8,225,000
3,500,000 shares
|
— | 30 Sep 2025 |
| CastleKnight Management LP |
13F
Company
|
—
denominator unverified
|
$5,797,041
2,466,826 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
71
Shares
24,748,809
Rows available
71
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q2 2026 Across Filers
Q2 2026 holders
3
Q4 2025 holders
71
Holder diff
68
| Investor | Q2 2026 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q2 2026 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend