TSEOQ

SEC source: 0001567619-23-003788 · doc1.xml · derivative · entry 3

Schewe Rainer · CIK 0001661138 · SVP, Supply Chain Services

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,635

Underlying: Ordinary Shares · 10,635 shares

Expires 2032-02-22

F3 · derivative.exercise_date: The option vests in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001567619-23-003788 · doc1.xml · nonDerivative · entry 2

Schewe Rainer · CIK 0001661138 · SVP, Supply Chain Services

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,302

F2 · shares: Represents ordinary shares issuable pursuant to RSU award that will vest in full on the second anniversary of the grant.

SEC source: 0001567619-23-003788 · doc1.xml · nonDerivative · entry 1

Schewe Rainer · CIK 0001661138 · SVP, Supply Chain Services

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,526

F1 · shares: Represents ordinary shares issuable pursuant to RSU award that will vest in full on the third anniversary of the grant.

SEC source: 0001567619-23-003786 · doc1.xml · derivative · entry 2

Ni James Mingyu · CIK 0001822107 · SVP, Latex Binders

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,914

Underlying: Ordinary Shares · 8,914 shares

Expires 2032-02-22

F2 · derivative.exercise_date: The option vests in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001567619-23-003786 · doc1.xml · nonDerivative · entry 1

Ni James Mingyu · CIK 0001822107 · SVP, Latex Binders

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,067

F1 · shares: Represents ordinary shares issuable pursuant to RSU award that will vest in full on the third anniversary of the grant.

SEC source: 0001567619-23-003777 · doc1.xml · derivative · entry 2

BOZICH FRANK A · CIK 0001660737 · Director · CEO and President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 121,823

Underlying: Ordinary Shares · 121,823 shares

Expires 2032-02-22

F2 · derivative.exercise_date: The option vests in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001567619-23-003777 · doc1.xml · nonDerivative · entry 1

BOZICH FRANK A · CIK 0001660737 · Director · CEO and President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 183,161

F1 · shares: Represents ordinary shares issuable pursuant to RSU award that will vest in full on the third anniversary of the grant.

SEC source: 0001567619-23-003776 · doc1.xml · derivative · entry 2

BOZICH FRANK A · CIK 0001660737 · Director · CEO and President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 121,823

Underlying: Ordinary Shares · 121,823 shares

Expires 2032-02-22

F2 · derivative.exercise_date: The option vests in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001567619-23-003776 · doc1.xml · nonDerivative · entry 1

BOZICH FRANK A · CIK 0001660737 · Director · CEO and President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 183,161

F1 · shares: Represents ordinary shares issuable pursuant to RSU award that will vest in full on the third anniversary of the grant.

SEC source: 0001567619-23-003766 · doc1.xml · derivative · entry 2

Beal Jean-Luc · CIK 0001859272 · SVP, Engineered Materials

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,879

Underlying: Ordinary Shares · 8,879 shares

Expires 2032-02-22

F2 · derivative.exercise_date: The option vests in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001567619-23-003766 · doc1.xml · nonDerivative · entry 1

Beal Jean-Luc · CIK 0001859272 · SVP, Engineered Materials

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,254

F1 · shares: Represents ordinary shares issuable pursuant to RSU award that will vest in full on the third anniversary of the grant.

SEC source: 0001567619-22-021513 · doc1.xml · nonDerivative · entry 1

Cooney Paula M. · CIK 0001670565 · SVP & CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,477

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001567619-22-020625 · doc1.xml · nonDerivative · entry 1

MARTENS PHILIP R · CIK 0001190851 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,300

F1 · price: Price reflects the weighted average sale price for the sale transactions made on the date reported above. Sale prices ranged from $24.57 to $24.66. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased or sold at each separate price.

SEC source: 0001567619-22-018259 · doc1.xml · nonDerivative · entry 1

Hendriks Han · CIK 0001946359 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,525

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001567619-22-017216 · doc1.xml · nonDerivative · entry 2

Desmond Jeanmarie F. · CIK 0001713192 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,515

F2 · price: Price reflects the weighted average purchase price for the purchase transaction made on the date reported above. Purchase prices ranged from $24.97 to $25.02. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased at each separate price.

SEC source: 0001567619-22-017216 · doc1.xml · nonDerivative · entry 1

Desmond Jeanmarie F. · CIK 0001713192 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,665

F1 · price: Price reflects the weighted average purchase price for the purchase transaction made on the date reported above. Purchase prices ranged from $25.42 to $25.49. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased at each separate price.

SEC source: 0001567619-22-016359 · doc1.xml · nonDerivative · entry 1

COTE JEFFREY J · CIK 0001196701 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,117

F1 · price: Price reflects the weighted average purchase price for the purchase transaction made on the date reported above. Purchase prices ranged from $31.51 to $31.87. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased at each separate price.

SEC source: 0001567619-22-014235 · doc1.xml · nonDerivative · entry 1

M&G INVESTMENT MANAGEMENT LTD · CIK 0000922898 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · Please see footnotes

Disclosed balance after: 7,625,044

F1 · ownership.nature: The reported securities are held directly by certain funds advised by M&G Investment Management Limited, (i) M&G (Lux) Investment Funds 1 holds 2,834,120 ordinary shares in Trinseo PLC.; (ii) M&G Global Dividend Fund directly holds 2,967,311 ordinary shares in Trinseo PLC.; (iii) LF Access Global Dividend Fund directly holds 1,754,526 ordinary shares in Trinseo PLC; and (iv) Fund Channel Investment Partners - FCH M&G Global Dividend directly holds 69,087 ordinary shares in Trinseo PLC. The reported securities may be deemed beneficially owned for the purposes of Section 13(d) of the Securities Exchange Act 1934 by M&G Investment Management Limited as investment manager to these funds.

F2 · ownership.nature: The Reporting Person disclaims beneficial ownership of the securities for purposes of Rule 16a-1(a) (2) and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

SEC source: 0001179110-22-003379 · edgar.xml · nonDerivative · entry 1

ALVARADO JOSEPH · CIK 0001047461 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,695

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003389 · edgar.xml · nonDerivative · entry 1

De Leener Pierre-Marie · CIK 0001423137 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,103

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003397 · edgar.xml · nonDerivative · entry 1

TOMKINS MARK E · CIK 0001204576 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,085

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003396 · edgar.xml · nonDerivative · entry 1

STEINMETZ HENRI · CIK 0001207044 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,382

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003394 · edgar.xml · nonDerivative · entry 1

MARTENS PHILIP R · CIK 0001190851 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,200

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003392 · edgar.xml · nonDerivative · entry 1

FARRELL MATTHEW · CIK 0001196053 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,358

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003384 · edgar.xml · nonDerivative · entry 1

COTE JEFFREY J · CIK 0001196701 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,117

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003381 · edgar.xml · nonDerivative · entry 1

LIN SANDRA BEACH · CIK 0001220571 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,299

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003395 · edgar.xml · nonDerivative · entry 1

Misheff Donald T · CIK 0001538453 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,553

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003393 · edgar.xml · nonDerivative · entry 1

Johnson KLynne · CIK 0001532447 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,135

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003391 · edgar.xml · nonDerivative · entry 1

Desmond Jeanmarie F. · CIK 0001713192 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,330

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003382 · edgar.xml · nonDerivative · entry 1

Brifo Victoria · CIK 0001867705 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,358

F1 · shares: Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.

SEC source: 0001179110-22-003331 · edgar.xml · nonDerivative · entry 1

ALVARADO JOSEPH · CIK 0001047461 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,794

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003335 · edgar.xml · nonDerivative · entry 1

De Leener Pierre-Marie · CIK 0001423137 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,188

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003341 · edgar.xml · nonDerivative · entry 1

STEINMETZ HENRI · CIK 0001207044 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,467

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003342 · edgar.xml · nonDerivative · entry 1

TOMKINS MARK E · CIK 0001204576 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,198

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003339 · edgar.xml · nonDerivative · entry 1

MARTENS PHILIP R · CIK 0001190851 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,313

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003337 · edgar.xml · nonDerivative · entry 1

FARRELL MATTHEW · CIK 0001196053 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,443

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003334 · edgar.xml · nonDerivative · entry 1

COTE JEFFREY J · CIK 0001196701 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,230

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003332 · edgar.xml · nonDerivative · entry 1

LIN SANDRA BEACH · CIK 0001220571 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,398

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003340 · edgar.xml · nonDerivative · entry 1

Misheff Donald T · CIK 0001538453 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,638

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003338 · edgar.xml · nonDerivative · entry 1

Johnson KLynne · CIK 0001532447 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,248

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003336 · edgar.xml · nonDerivative · entry 1

Desmond Jeanmarie F. · CIK 0001713192 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,443

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003333 · edgar.xml · nonDerivative · entry 1

Brifo Victoria · CIK 0001867705 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,443

F1 · shares: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

SEC source: 0001179110-22-003186 · edgar.xml · derivative · entry 3

Skeete Bernard M · CIK 0001781229 · VP, CAO and Global Controller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,745

Underlying: Ordinary Shares · 944 shares

Expires 2029-02-25

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The option vests in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001179110-22-003186 · edgar.xml · nonDerivative · entry 2

Skeete Bernard M · CIK 0001781229 · VP, CAO and Global Controller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,897

F1 · kind: A portion of proceeds from the sale were used to pay the exercise price of stock options pursuant to a broker-assisted cashless exercise, and applicable withholding taxes.

F2 · price: Price reflects the weighted average sale price for the sale transactions made on the date reported above. Sale prices ranged from $_____ to $______. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased or sold at each separate price.

SEC source: 0001179110-22-003186 · edgar.xml · nonDerivative · entry 1

Skeete Bernard M · CIK 0001781229 · VP, CAO and Global Controller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,841

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001179110-22-003165 · edgar.xml · derivative · entry 3

BOZICH FRANK A · CIK 0001660737 · Director · CEO and President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,915

Underlying: Ordinary Shares · 20,957 shares

Expires 2029-02-25

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The option vests in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001179110-22-003165 · edgar.xml · nonDerivative · entry 2

BOZICH FRANK A · CIK 0001660737 · Director · CEO and President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 128,219

F1 · kind: A portion of the proceeds from the sale were used to pay the exercise price of stock options pursuant to a broker-assisted cashless exercise, and applicable withholding taxes. The exercise and sale were made pursuant to a preexisting 10b5-1 plan executed in May 2021.

F2 · price: Price reflects the weighted average sale price for the sale transactions made on the date reported above. Sale prices ranged from $42.89 to $44.35. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased or sold at each separate price.

SEC source: 0001179110-22-003165 · edgar.xml · nonDerivative · entry 1

BOZICH FRANK A · CIK 0001660737 · Director · CEO and President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 149,176

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001179110-22-002637 · edgar.xml · derivative · entry 3

BOZICH FRANK A · CIK 0001660737 · Director · CEO and President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,872

Underlying: Ordinary Shares · 20,957 shares

Expires 2029-02-25

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The option vests in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001179110-22-002637 · edgar.xml · nonDerivative · entry 2

BOZICH FRANK A · CIK 0001660737 · Director · CEO and President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 128,219

F1 · kind: A portion of the proceeds from the sale were used to pay the exercise price of stock options pursuant to a broker-assisted cashless exercise, and applicable withholding taxes. The exercise and sale were made pursuant to a preexisting 10b5-1 plan executed in May 2021.

F2 · price: Price reflects the weighted average sale price for the sale transactions made on the date reported above. Sale prices ranged from $45.46 to $46.84. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased or sold at each separate price.