Document:

EX-4.8

 Exhibit 4.8 

AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT 

This REGISTRATION RIGHTS AGREEMENT (as it may be amended from time to time in accordance with the terms hereof, the
“Agreement”), dated as of [ ], 2014, is made by and among Trinseo S.A., a public limited liability company (société anonyme) existing under the laws of the Grand Duchy of Luxembourg (the
“Company”) and Bain Capital Everest Manager Holding S.C.A., a société en commandite par actions existing under the laws of the Grand Duchy of Luxembourg (the “Investor”) such other Persons, if any,
that from time to time become party hereto as holders of Registrable Securities in their capacity as Permitted Transferees (together with the Investor, the “Investors”). 

RECITALS 
 WHEREAS, the
Company has filed a registration statement on Form S-1 to initiate an initial public offering of Ordinary Shares; and 
 WHEREAS, the
Investor, as of the date hereof, is the sole shareholder of the Company and the parties believe that it is in the best interests of the Company and the other parties hereto to set forth their agreements regarding registration rights. 

NOW, THEREFORE, in consideration of the foregoing and the mutual promises, covenants and agreements of the parties hereto, and for other good
and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereto agree as follows: 

AGREEMENT 

Therefore, the parties hereto hereby agree as follows: 
  

	1.	EFFECTIVENESS; DEFINITIONS. 

 1.1. Closing. This Agreement shall become effective
immediately upon signing. 
 1.2. Definitions. Certain terms are used in this Agreement as specifically defined herein. These
definitions are set forth or referred to in Section 5 hereof. 
  

	2.	REGISTRATION RIGHTS. The Company will perform and comply, and cause each of its subsidiaries to perform and comply, with such of the following provisions as are applicable to it. Each Holder will
perform and comply with such of the following provisions as are applicable to such Holder. 

 2.1. Demand
Registration Rights for Investor Registrable Securities. 
 2.1.1. General. One or more Investors, by notice to
the Company specifying the intended method or methods of disposition, may request that the Company effect the registration under the Securities Act for a Public Offering of all or a specified part of the Registrable Securities held by such
Investors. The Company will then use its best efforts to (i) effect the registration under the Securities Act (including by means of a 

 
shelf registration pursuant to Rule 415 under the Securities Act if requested by the Participating Investors and if the Company is then eligible to use such registration) of the Registrable
Securities that the Company has been requested to register by such Investors together with all other Registrable Securities that the Company has been requested to register pursuant to Section 2.2 by other Holders, and (ii) if requested by
the Participating Investors, obtain acceleration of the effective date of the registration statement relating to such registration; provided, however, that the Company shall not be obligated to take any action to effect any such
registration pursuant to this Section 2.1.1: 
 (a) during the effectiveness of any Lock-Up Agreement entered into in
connection with any registration statement pertaining to an underwritten public offering of securities of the Company for its own account (other than a Rule 145 Transaction, or a registration relating solely to employee benefit plans); 

(b) if a registration statement requested under this Section 2.1.1 became effective within the preceding 60 days. 

2.1.2. Form. Except as otherwise provided above or required by law, each registration requested pursuant to
Section 2.1.1 shall be effected by the filing of a registration statement on Form S-3 (or any successor or similar form which includes substantially the same information as would be required to be included in a registration statement on such
form as currently constituted), if the Company is then eligible to use such registration; provided that (x) if any registration requested pursuant to this Section 2.1 is proposed to be effected on Form S-3 (or any successor or
similar shortform registration statement) and (i) the Company is not then eligible to use such registration or (ii) the registration is in connection with an underwritten offering, and if the managing underwriter shall advise the Company
in writing that, in its opinion, it is of material importance to the success of such proposed offering to file a registration statement on Form S-1 (or any successor or similar registration statement) or to include in such registration statement
information not required to be included pursuant to Form S-3 (or any successor or similar shortform registration statement), then (y) the Company will file a registration statement on Form S-1 or supplement Form S-3 (or any successor or similar
shortform registration statement) as reasonably requested. 
 2.1.3. Payment of Expenses. The Company shall pay all
Registration Expenses in connection with registrations of Registrable Securities pursuant to this Section 2.1. 
 2.1.4.
Additional Procedures. If requested by the Participating Investors, the Company will enter into an underwriting agreement with the underwriters for such offering containing such representations and warranties by the Company and such Holders
and such other terms and provisions as are customarily contained in underwriting agreements with respect to secondary distributions, including customary indemnity and contribution provisions (subject, in each case, to the limitations on such
liabilities set forth in this Agreement). 

 2.1.5. Suspension of Registration. If the filing, initial effectiveness or
continued use of a registration statement, including a shelf registration statement pursuant to Rule 415 under the Securities Act, in respect of a registration pursuant to this Section 2.1 at any time would require the Company to make a public
disclosure of material non-public information, which disclosure in the good faith judgment of the Board (after consultation with external legal counsel) (i) would be required to be made in any registration statement so that such registration
statement would not be materially misleading, (ii) would not be required to be made at such time but for the filing, effectiveness or continued use of such registration statement and (iii) would have a material adverse effect on the
Company or its business or on the Company’s ability to effect a material proposed acquisition, disposition, financing, reorganization, recapitalization or similar transaction, then the Company may, upon giving prompt written notice of such
action to the Holders participating in such registration, delay the filing or initial effectiveness of, or suspend use of, such registration statement; provided, that the Company shall not be permitted to do so (i) more than two times
during any 12 month period, (ii) for a period exceeding 30 days on any one occasion or (iii) for a period exceeding 60 days in any 12 month period. In the event the Company exercises its rights under the preceding sentence, such Holders
agree to suspend, promptly upon their receipt of the notice referred to above, their use of any prospectus relating to such registration in connection with any sale or offer to sell Registrable Securities. The Company shall promptly notify such
Holders of the expiration of any period during which it exercised its rights under this Section 2.1.5. The Company agrees that, in the event it exercises its rights under this Section 2.1.5, it shall, within 30 days following such
Holders’ receipt of the notice of suspension, update the suspended registration statement as may be necessary to permit the Holders to resume use thereof in connection with the offer and sale of their Registrable Securities in accordance with
applicable law. 
 2.2. Piggyback Registration Rights. 

2.2.1. Piggyback Registration. 

(a) General. Each time the Company proposes to register any Ordinary Shares under the Securities Act on a form which
would permit registration of Registrable Securities for sale to the public for its own account and/or for the account of any other Person (pursuant to Section 2.1 or otherwise) for sale in a Public Offering (including each time the Company
proposes to offer Ordinary Shares to the public for its own account and/or for the account if any other Person pursuant to an effective shelf registration statement pursuant to Rule 415 under the Securities Act), the Company will give notice to all
Holders of its intention to do so. Any Holder may, by written response delivered to the Company within 10 days after the date of delivery of such notice (or such shorter period as may reasonably be requested in connection with the filing of any
automatically effective registration statement), request that all or a specified part of such Holder’s Registrable Securities be included in such registration. The Company thereupon will use its reasonable best efforts to cause to be included
in such registration under the Securities Act all Registrable Securities which the Company 

 
has been so requested to register by such Holders, to the extent required to permit the disposition (in accordance with the methods to be used by the Company or, pursuant to Section 2.1,
other Holders in such Public Offering) of the Registrable Securities to be so registered; provided that (i) if, at any time after giving written notice of its intention to register any securities, the Company shall determine for any
reason not to proceed with the proposed registration of the securities, the Company may, at its election, give written notice of such determination to each Holder and, thereupon, shall be relieved of its obligation to register any Registrable
Securities in connection with such registration pursuant to this Section 2.2.1 (but not from its obligation to pay the Registration Expenses in connection therewith), and (ii) if such registration involves an underwritten offering, all
Holders requesting to be included in such registration and electing to participate in such underwritten offering must sell their Registrable Securities to the underwriters on the same terms and conditions as apply to the Company (with such
differences as may be customary or appropriate in combined primary and secondary offerings), or, in the case of any registration requested pursuant to Section 2.1, the Participating Investors. No registration of Registrable Securities effected
under this Section 2.2 shall relieve the Company of any of its obligations to effect registrations of Registrable Securities pursuant to Section 2.1 hereof. 

(b) Excluded Transactions. The Company shall not be obligated to effect any registration of Registrable Securities under
this Section 2.2 incidental to the registration of any of its securities in connection with: 
 (i) Any Public Offering
relating to employee benefit plans or dividend reinvestment plans; or 
 (ii) Any Public Offering relating to the
acquisition or merger after the date hereof by the Company or any of its subsidiaries of or with any other businesses except to the extent such Public Offering is for the sale of securities in cash. 

2.2.2. Payment of Expenses. The Company will pay all Registration Expenses in connection with registrations of
Registrable Securities pursuant to this Section 2.2. 
 2.2.3. Additional Procedures. Holders participating in
any Public Offering pursuant to this Section 2.2 shall take all such actions and execute all such documents and instruments that are reasonably requested by the Company to effect the sale of their Registrable Securities in such Public Offering,
including being parties to the underwriting agreement entered into by the Company and any other selling shareholders in connection therewith and being liable in respect of the representations and warranties and the other agreements (including
customary selling shareholder representations, warranties, indemnifications and “lock-up” agreements) for the benefit of the underwriters contained therein; provided, however, that with respect to individual representations,
warranties, indemnities and agreements of sellers of Registrable Securities contained in such underwriting agreement, the aggregate amount of such liability (including contribution) thereunder shall be several and not joint and shall not exceed such
holder’s net proceeds from such offering. 

 2.2.4. Registration Statement Form. The Company shall select the
registration statement form for any registration pursuant to this Section 2.2 (other than a registration that is also pursuant to Section 2.1); provided that if any registration requested pursuant to this Section 2.2 is proposed to be
effected on Form S-3 (or any successor form) and is in connection with an underwritten offering, and if the managing underwriter shall advise the Company in writing that, in its opinion, it is of material importance to the success of such proposed
offering to include in such registration statement information not required to be included pursuant to such form, then the Company will supplement such registration statement as reasonably requested by such managing underwriter. 

2.3. Certain Other Provisions. 

2.3.1. Underwriter’s Cutback. In connection with any registration of shares, the underwriter may determine that
marketing factors (including an adverse effect on the per share offering price) require a limitation of the number of shares to be underwritten. Notwithstanding any contrary provision of this Section 2 and subject to the terms of this
Section 2.3.1, the underwriter may limit the number of shares which would otherwise be included in such registration by excluding Registrable Securities from such registration, it being understood that, if the registration in question involves
a registration for sale of securities for the Company’s own account, then the number of shares which the Company seeks to have registered in such registration shall not be subject to exclusion, in whole or in part, under this
Section 2.3.1. Upon receipt of notice from the underwriter of the need to reduce the number of shares to be included in the registration, the Company shall advise all holders of the Company’s securities that would otherwise be registered
and underwritten pursuant hereto, and the number of shares of such securities, including Registrable Securities, that may be included in the registration shall be allocated in the following manner, unless the underwriter shall determine that
marketing factors require a different allocation: shares, other than Registrable Securities, requested to be included in such registration by other shareholders shall be excluded unless the Company, with the consent of the parties required to
approve any amendment or waiver of this Agreement pursuant to Section 4.2, has granted registration rights which are to be treated on an equal basis with Registrable Securities for the purpose of the exercise of the underwriter cutback (such
shares afforded such equal treatment being “Parity Shares”); and, if a limitation on the number of shares is still required, the number of Registrable Securities, Parity Shares and other Ordinary Shares that may be included in such
registration shall be allocated among the holders thereof in proportion, as nearly as practicable, as follows: 
 (a) there
shall be first allocated to each such Holder requesting that its Registrable Securities or Parity Shares be registered in such registration a number of such shares to be included in such registration equal to the lesser of (A) the number of
such shares requested to be registered by such holder, and (B) a number of such shares equal to such holder’s Pro Rata Portion; 

 (b) the balance, if any, not allocated pursuant to clause (a) above shall be
allocated to those holders requesting that their Registrable Securities or Parity Shares be registered in such registration which requested to register a number of such shares in excess of such holder’s Pro Rata Portion pro rata to each such
holder based upon the number of Registrable Securities and Parity Shares held by such holder, or in such other manner as the holders requesting that their Registrable Securities or Parity Shares be registered in such registration may otherwise
agree; and 
 (c) the balance, if any, not allocated pursuant to clause (b) above shall be allocated to shares, other
than Registrable Securities and Parity Shares, requested to be included in such registration by other shareholders. 
 No securities excluded
from the underwriting by reason of the underwriter’s marketing limitation shall be included in such registration. 

2.3.2. Restrictions on withdrawal from certain registrations. A written request that Registrable Securities be included
in the underwriting pursuant to Section 2.1.1 or 2.2.1(a) in connection with any overnight “block trade” conducted as a Public Offering, shall be binding on the Participating Investor, provided that each Participating Investor that
elects to participate in any such registration may condition its participation on such registration being completed within ten (10) trading days of its acceptance at a price per share (after giving effect to any underwriters’ discounts or
commissions) to such Participating Investor of not less than ninety-two percent (92%) of the closing price for the shares on their principal trading market on the trading day immediately prior to such Participating Investor’s election to
participate. 
 2.3.3. Registration Procedures. If, and in each case when, the Company is required to effect a
registration of any Registrable Securities as provided in this Section 2, the Company shall promptly: 
 (a) prepare
and, in any event within forty-five days (five days in the case of a Form S-3 registration) after the end of the period under Section 2.2.1(a) within which a piggyback request for registration may be given to the Company, file with the
Commission a registration statement with respect to such Registrable Securities and use its reasonable best efforts to cause such registration statement to become effective as promptly as practicable and in any event within ninety days of the
initial filing; 
 (b) prepare and file with the Commission such amendments and supplements to such registration statement
and the prospectus used in connection therewith as may be necessary to keep such registration statement effective for a period not in excess of 270 days (or such shorter period which will terminate when all Registrable Securities covered by such
registration statement have been sold) and to comply with the provisions of the Securities Act and the Exchange Act with respect to the disposition of all securities covered by such registration statement during such period in accordance with the
intended methods of 

 
disposition by the seller or sellers thereof set forth in such registration statement; provided that before filing a registration statement or prospectus, or any amendments or supplements
thereto in accordance with Sections 2.1 or 2.2, the Company will furnish to counsel selected pursuant to Section 2.3.3 hereof copies of all documents proposed to be filed, which documents will be subject to the review and comment of such
counsel; 
 (c) furnish to each seller of such Registrable Securities such number of copies of such registration statement
and of each amendment and supplement thereto (in each case including all exhibits filed therewith), such number of copies of the prospectus included in such registration statement (including each preliminary prospectus and summary prospectus), in
conformity with the requirements of the Securities Act, and such other documents as such seller may reasonably request in order to facilitate the disposition of the Registrable Securities by such seller; 

(d) use its reasonable best efforts to register or qualify such Registrable Securities covered by such registration in such
jurisdictions as each seller shall reasonably request, and do any and all other acts and things which may be reasonably necessary or advisable to enable such seller to consummate the disposition in such jurisdictions of the Registrable Securities
owned by such seller, except that the Company shall not for any such purpose be required to qualify generally to do business as a foreign corporation in any jurisdiction where, but for the requirements of this clause (d), it would not be obligated
to be so qualified or to consent to general service of process in any such jurisdiction; 
 (e) notify each seller of any
such Registrable Securities covered by such registration statement, at any time when a prospectus relating thereto is required to be delivered under the Securities Act, of the Company’s becoming aware that the prospectus included in such
registration statement, as then in effect, includes an untrue statement of a material fact or omits to state a material fact required to be stated therein or necessary to make the statements therein not misleading in the light of the circumstances
then existing, and at the request of any such seller, prepare and furnish to such seller a reasonable number of copies of an amended or supplemental prospectus as may be necessary so that, as thereafter delivered to the purchasers of such
Registrable Securities, such prospectus shall not include an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading in the light of the
circumstances then existing; 
 (f) otherwise use its reasonable best efforts to comply with all applicable rules and
regulations of the Commission, and make available to its security holders, as soon as reasonably practicable (but not more than 18 months) after the effective date of the registration statement, an earnings statement which shall satisfy the
provisions of Section 11(a) of the Securities Act; 

 (g) (i) if such Registrable Securities are Ordinary Shares (including
Ordinary Shares issuable upon conversion, exchange or exercise of another security), use its reasonable best efforts to list such Registrable Securities on any securities exchange on which the Ordinary Shares are then listed; and (ii) use its
reasonable best efforts to provide a transfer agent and registrar for such Registrable Securities covered by such registration statement not later than the effective date of such registration statement; 

(h) enter into such customary agreements (including an underwriting agreement in customary form), which may include
indemnification provisions in favor of underwriters and other Persons, subject to Section 2.2.3 , and take such other actions as the Participating Investors or the underwriters, if any, reasonably requested in order to expedite or facilitate
the disposition of such Registrable Securities; 
 (i) obtain a “comfort” letter or letters from the Company’s
independent public accountants in customary form and covering matters of the type customarily covered by “comfort” letters; 

(j) make available for inspection by any seller of such Registrable Securities covered by such registration statement, by any
managing underwriter or underwriters participating in any disposition to be effected pursuant to such registration statement and by any attorney, accountant or other agent retained by any such seller or any such managing underwriter(s), all
pertinent financial and other records, pertinent corporate documents and properties of the Company, and cause all of the Company’s officers, directors and employees to supply all information reasonably requested by any such seller, underwriter,
attorney, accountant or agent in connection with such registration statement or underwritten offering; 
 (k) notify counsel
(selected pursuant to Section 2.3.3 hereof) for the Holders of Registrable Securities included in such registration statement and the managing underwriter or agent, immediately, and confirm the notice in writing (i) when the registration
statement, or any post-effective amendment to the registration statement, shall have become effective, or any supplement to the prospectus or any amendment to the prospectus shall have been filed, (ii) of the receipt of any comments from the
Commission, (iii) of any request of the Commission to amend the registration statement or amend or supplement the prospectus or for additional information, and (iv) of the issuance by the Commission of any stop order suspending the
effectiveness of the registration statement or of any order preventing or suspending the use of any preliminary prospectus, or of the suspension of the qualification of the registration statement for offering or sale in any jurisdiction, or of the
institution or threatening of any proceedings for any of such purposes; 
 (l) use its reasonable best efforts to prevent the
issuance of any stop order suspending the effectiveness of the registration statement or of any order preventing or suspending the use of any preliminary prospectus and, if any such order is issued, to obtain the withdrawal of any such order as soon
as practicable; 

 (m) if requested by the managing underwriter or agent or any Holder of
Registrable Securities covered by the registration statement, incorporate in a prospectus supplement or post-effective amendment such information as the managing underwriter or agent or such Holder reasonably requests to be included therein,
including, with respect to the number of Registrable Securities being sold by such Holder to such underwriter or agent, the purchase price being paid therefor by such underwriter or agent and with respect to any other terms of the underwritten
offering of the Registrable Securities to be sold in such offering; and make all required filings of such prospectus supplement or post-effective amendment as soon as practicable after being notified of the matters incorporated in such prospectus
supplement or post-effective amendment; 
 (n) cooperate with the Holders of Registrable Securities covered by the
registration statement and the managing underwriter or agent, if any, to facilitate the timely preparation and delivery of certificates (not bearing any restrictive legends) representing securities to be sold under the registration statement, and
enable such securities to be in such denominations and registered in such names as the managing underwriter or agent, if any, or such Holders may request; 

(o) obtain for delivery to the Holders of Registrable Securities being registered and to the underwriter or agent an opinion or
opinions from counsel for the Company in customary form and in form, substance and scope reasonably satisfactory to such Holders, underwriters or agents and their counsel; 

(p) cooperate with each seller of Registrable Securities and each underwriter or agent participating in the disposition of such
Registrable Securities and their respective counsel in connection with any filings required to be made with the FINRA; 
 (q)
use its reasonable best efforts to make available the executive officers of the Company to participate with the Holders of Registrable Securities and any underwriters in any “road shows” that may be reasonably requested by the Holders in
connection with distribution of the Registrable Securities; 
 (r) cooperate with the Participating Investors and with the
managing underwriter or agent, if any, to facilitate any Charitable Gifting Event and to prepare and file with the Commission such amendments and supplements to such registration statement and the prospectus used in connection therewith as may be
necessary to permit any such recipient Charitable Organization to sell in any Public Offering if it so elects. 
 2.3.4.
Selection of Underwriters and Counsel. The underwriters and legal counsel to be retained by the Company in connection with any registration or Public Offering shall be selected by the Board; provided that, in the case of a registration

 
pursuant to, or a Public Offering following a request therefor under Section 2.1.1, such underwriters and counsel shall be reasonably acceptable to the Participating Investors. In connection
with any registration of Registrable Securities pursuant to Sections 2.1 and 2.2 hereof, the Participating Investors may select one counsel (plus counsel in each additional jurisdiction applicable to such Participating Investors or the Company) to
represent all Holders of Registrable Securities covered by such registration. 
 2.3.5. Lock-Up. If any registration
pursuant to Section 2.1 of this Agreement shall be in connection with an underwritten Public Offering and if requested by the managing underwriters, the Company and each Holder agrees not to effect any public sale or distribution of Ordinary
Shares of the Company (or securities convertible into or exchangeable or exercisable for Ordinary Shares) (in each case, other than as part of such underwritten public offering and other than pursuant to a registration on Form S-4 or S-8), within 90
days (or such shorter period as the managing underwriters may require) after, the effective date of such registration (except as part of such registration). 

2.3.6. Other Agreements. The Company covenants and agrees that, so long as any Person holds any Registrable Securities
in respect of which any registration rights provided for in Section 2.1 of this Agreement remain in effect, the Company will not, directly or indirectly, grant to any Person or agree to or otherwise become obligated in respect of rights of
registration in the nature or substantially in the nature of those set forth in Section 2.1 or 2.2 of this Agreement that would have priority over the Registrable Securities with respect to the inclusion of such securities in any registration.

 2.4. Indemnification and Contribution. 

2.4.1. Indemnities of the Company. In the event of any registration of any Registrable Securities or other debt or
equity securities of the Company or any of its subsidiaries under the Securities Act pursuant to this Section 2 or otherwise, and in connection with any registration statement or any other disclosure document produced by or on behalf of the
Company or any of its subsidiaries including reports required and other documents filed under the Exchange Act, and other documents pursuant to which any debt or equity securities of the Company or any of its subsidiaries are sold (whether or not
for the account of the Company or its subsidiaries), the Company will, and hereby does, and will cause each of its subsidiaries, jointly and severally, to indemnify and hold harmless each holder of Registrable Securities, any Person who is or might
be deemed to be a controlling Person of the Company or any of its subsidiaries within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act, their respective direct and indirect partners, advisory board members,
directors, officers, trustees, members and shareholders, and each other Person, if any, who controls any such holder or any such controlling Person within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act
(each such Person being referred to herein as a “Covered Person”), against any losses, claims, damages or liabilities (or actions or proceedings in respect thereof), joint or several, to which such Covered Person may be or become
subject under the Securities Act, the Exchange Act, any other securities or other law of any jurisdiction, the common law or otherwise, insofar as such losses, claims, damages or liabilities (or actions or proceedings in respect thereof) arise

 
out of or are based upon (i) any untrue statement or alleged untrue statement of any material fact contained or incorporated by reference in any registration statement under the Securities
Act, any preliminary prospectus or final prospectus included therein, or any related summary prospectus, or any amendment or supplement thereto, or any document incorporated by reference therein, or any other such disclosure document (including
reports and other documents filed under the Exchange Act and any document incorporated by reference therein) or other document or report, (ii) any omission or alleged omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading or (iii) any violation or alleged violation by the Company or any of its subsidiaries of any federal, state, foreign or common law rule or regulation applicable to the Company or any of
its subsidiaries and relating to action or inaction in connection with any such registration, disclosure document or other document or report, and will reimburse such Covered Person for any legal or any other expenses incurred by it in connection
with investigating or defending any such loss, claim, damage, liability, action or proceeding; provided, however, that neither the Company nor any of its subsidiaries shall be liable to any Covered Person in any such case to the extent
that any such loss, claim, damage, liability, action or proceeding arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in such registration statement, any such preliminary prospectus,
final prospectus, summary prospectus, amendment or supplement, incorporated document or other such disclosure document or other document or report, in reliance upon and in conformity with written information furnished to the Company or to any of its
subsidiaries through an instrument duly executed by such Covered Person specifically stating that it is for use in the preparation thereof. The indemnities of the Company and of its subsidiaries contained in this Section 2.4.1 shall remain in
full force and effect regardless of any investigation made by or on behalf of such Covered Person and shall survive any transfer of securities or any termination of this Agreement. 

2.4.2. Indemnities to the Company. Subject to Section 2.4.4, the Company and any of its subsidiaries may require,
as a condition to including any securities in any registration statement filed pursuant to this Section 2, that the Company and any of its subsidiaries shall have received an undertaking satisfactory to it from the prospective seller of such
securities, severally and not jointly, to indemnify and hold harmless the Company and any of its subsidiaries, each director of the Company or any of its subsidiaries, each officer of the Company or any of its subsidiaries who shall sign such
registration statement and each other Person (other than such seller), if any, who controls the Company and any of its subsidiaries within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act and each other
prospective seller of such securities with respect to any statement in or omission from such registration statement, any preliminary prospectus, final prospectus or summary prospectus included therein, or any amendment or supplement thereto, or any
other disclosure document (including reports and other documents filed under the Exchange Act or any document incorporated therein) or other document or report, if such statement or omission was made in reliance upon and in conformity with written
information furnished to the Company or any of its subsidiaries through an instrument executed by such seller specifically stating that it is for use in the preparation of such registration 

 
statement, preliminary prospectus, final prospectus, summary prospectus, amendment or supplement, incorporated document or other document or report. Such indemnity shall remain in full force and
effect regardless of any investigation made by or on behalf of the Company, any of its subsidiaries or any such director, officer or controlling Person and shall survive any transfer of securities or any termination of this Agreement. 

2.4.3. Contribution. If the indemnification provided for in Sections 2.4.1 or 2.4.2 hereof is unavailable to a party
that would have been entitled to indemnification pursuant to the foregoing provisions of this Section 2.4 (an “Indemnitee”) in respect of any losses, claims, damages or liabilities (or actions or proceedings in respect thereof)
referred to therein, then each party that would have been an indemnifying party thereunder shall, subject to Section 2.4.4 and in lieu of indemnifying such Indemnitee, contribute to the amount paid or payable by such Indemnitee as a result of
such losses, claims, damages or liabilities (or actions or proceedings in respect thereof) in such proportion as is appropriate to reflect the relative fault of such indemnifying party on the one hand and such Indemnitee on the other in connection
with the statements or omissions which resulted in such losses, claims, damages or liabilities (or actions or proceedings in respect thereof). The relative fault shall be determined by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by such indemnifying party or such Indemnitee and the parties’ relative intent, knowledge, access to information
and opportunity to correct or prevent such statement or omission. The parties agree that it would not be just or equitable if contribution pursuant to this Section 2.4.3 were determined by pro rata allocation or by any other method of
allocation which does not take account of the equitable considerations referred to in the preceding sentence. The amount paid or payable by a contributing party as a result of the losses, claims, damages or liabilities (or actions or proceedings in
respect thereof) referred to above in this Section 2.4.3 shall include any legal or other expenses reasonably incurred by such Indemnitee in connection with investigating or defending any such action or claim. No Person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any Person who was not guilty of such fraudulent misrepresentation. 

2.4.4. Limitation on Liability of Holders of Registrable Securities. The liability of each holder of Registrable
Securities in respect of any indemnification or contribution obligation of such holder arising under this Section 2.4 shall not in any event exceed an aggregate amount equal to the net proceeds to such holder (after deduction of all
underwriters’ discounts and commissions) from the disposition of the Registrable Securities disposed of by such holder pursuant to such registration. 

2.4.5. Indemnification Procedures. Promptly after receipt by an Indemnitee of written notice of the commencement of any
action or proceeding with respect to which a claim for indemnification may be made pursuant to this Section 2.4, such Indemnitee will, if a claim in respect thereof is to be made against an indemnifying party, give written notice to the latter
of the commencement of such action or proceeding; provided that the failure of the Indemnitee to give notice as provided herein shall not relieve the 

 
indemnifying party of its obligations under this Section 2.4, except to the extent that the indemnifying party loses substantive legal rights by such failure to give notice. In case any such
action or proceeding is brought against an Indemnitee, the indemnifying party will be entitled to participate in and to assume the defense thereof (at its expense), jointly with any other indemnifying party similarly notified to the extent that it
may wish, with counsel reasonably satisfactory to such Indemnitee, and after notice from the indemnifying party to such Indemnitee of its election so to assume the defense thereof, the indemnifying party will not be liable to such Indemnitee for any
legal or other expenses subsequently incurred by the latter in connection with the defense thereof other than reasonable costs of investigation and shall have no liability for any settlement made by the Indemnitee without the consent of the
indemnifying party, such consent not to be unreasonably withheld. Notwithstanding the foregoing, if in such Indemnitee’s reasonable judgment a conflict of interest between such Indemnitee and the indemnifying parties may exist in respect of
such action or proceeding or the indemnifying party does not assume the defense of any such action or proceeding within a reasonable time after notice of commencement, the Indemnitee shall have the right to assume or continue its own defense and the
indemnifying party shall be liable for any reasonable expenses therefor, but in no event will bear the expenses for more than one firm of counsel for all Indemnitees in each jurisdiction, unless there is a conflict of interest among Indemnitees, in
which case the indemnifying party shall be liable for the reasonable expenses of additional counsel. No indemnifying party will settle any action or proceeding or consent to the entry of any judgment without the prior written consent of the
Indemnitee, unless such settlement or judgment (i) includes as an unconditional term thereof the giving by the claimant or plaintiff of a release to such Indemnitee from all liability in respect of such action or proceeding and (ii) does
not involve an admission of fault, the imposition of equitable remedies or the imposition of any obligations on such Indemnitee and does not otherwise adversely affect such Indemnitee, other than as a result of the imposition of financial
obligations for which such Indemnitee will be indemnified hereunder. 
  

	3.	REMEDIES. 

 The parties shall have all remedies available at law, in equity or otherwise in the event of
any breach or violation of this Agreement or any default hereunder. The parties acknowledge and agree that in the event of any breach of this Agreement, in addition to any other remedies which may be available, each of the parties hereto shall be
entitled to specific performance of the obligations of the other parties hereto and, in addition, to such other equitable remedies (including preliminary or temporary relief) as may be appropriate in the circumstances. 

 

	4.	AMENDMENT, TERMINATION, ETC. 

 4.1. Oral Modifications. This Agreement may not be
orally amended, modified, extended or terminated, nor shall any oral waiver of any of its terms be effective. 
 4.2. Written
Modifications. This Agreement may be amended, modified, extended or terminated, and the provisions hereof may be waived, only by an agreement in writing signed by the Company and the Investors holding a majority of Registrable Securities held by
all Investors. 

 
Each such amendment shall be binding upon each party hereto and each Holder of Registrable Securities. In addition, each party hereto and each Holder of Registrable Securities may waive any right
hereunder by an instrument in writing signed by such party or holder. 
 4.3. Effect of Termination. No termination under this
Agreement shall relieve any Person of liability for breach prior to termination. In the event this Agreement is terminated, each Investor shall retain the indemnification rights pursuant to Section 2.4 hereof with respect to any matter that
(i) may be an indemnified liability thereunder and (ii) occurred prior to such termination. 
  

	5.	DEFINITIONS. 

 For purposes of this Agreement: 

5.1. Certain Matters of Construction. In addition to the definitions referred to or set forth below in this Section 5: 

(i) The words “hereof’, “herein”, “hereunder” and words of similar import shall refer to this
Agreement as a whole and not to any particular Section or provision of this Agreement, and reference to a particular Section of this Agreement shall include all subsections thereof; 

(ii) The word “including” shall mean including, without limitation; 

(iii) Definitions shall be equally applicable to both nouns and verbs and the singular and plural forms of the terms defined;
and 
 (iv) The masculine, feminine and neuter genders shall each include the other. 

5.2. Definitions. The following terms shall have the following meanings: 

“Affiliate” shall mean, with respect to any specified Person, (a) any other Person which directly or indirectly through
one or more intermediaries controls, or is controlled by, or is under common control with, such specified Person (for the purposes of this definition “control” (including, with correlative meanings, the terms “controlling,”
“controlled by” and “under common control with”), as used with respect to any Person, means the possession, directly or indirectly, of the power to direct or cause the direction of the management or policies of such Person,
whether through the ownership of voting securities, by agreement or otherwise); provided, however, that neither the Company nor any of its subsidiaries shall be deemed an Affiliate of any of the Investors (and vice versa), (b) if
such specified Person is an investment fund, any other investment fund the primary investment advisor to which is the primary investment advisor to such specified Person or an Affiliate thereof and (c) if such specified Person is a natural
Person, any Family Member of such natural Person. 
 “Agreement” shall have the meaning set forth in the Preamble. 

 “Board” shall mean the board of directors of the Company. 

“business day” shall mean any day that is not a Saturday, a Sunday or other day on which banks are required or authorized by
law to be closed in the City of New York. 
 “Charitable Gifting Event” means any transfer by a holder of Registrable
Securities, or any subsequent transfer by such holder’s members, partners or other employees, in connection with a bona fide gift to any Charitable Organization made on the date of, but prior to, the execution of the underwriting agreement
entered into in connection with any underwritten Public Offering. 
 “Charitable Organization” shall mean a charitable
organization as described by Section 501(c)(3) of the Internal Revenue Code of 1986, as in effect from time to time. 

“Commission” shall mean the Securities and Exchange Commission. 

“Company” shall have the meaning set forth in the Preamble. 

“Covered Person” shall have the meaning set forth in Section 2.4.1. 

“Exchange Act” shall mean the Securities Exchange Act of 1934, as in effect from time to time. 

“Family Member” shall mean, with respect to any natural Person, (i) any lineal descendant or ancestor or sibling (by
birth or adoption) of such natural Person, (ii) any spouse or former spouse of any of the foregoing, (iii) any legal representative or estate of any of the foregoing, (iv) any trust maintained for the benefit of any of the foregoing
and (v) any corporation, private charitable foundation or other organization controlled by any of the foregoing. 

“FINRA” shall mean the Financial Industry Regulatory Authority. 

“Holders” shall mean the holders of Registrable Securities under this Agreement and, with respect to any Investor, any
shareholder, partner or manager of such Investor who receives Registrable Securities from such Investor. 
 “Indemnitee”
shall have the meaning set forth in Section 2.4.3. 
 “IPO” shall have the meaning set forth in the recitals. 

“Investors” shall have the meaning set forth in the Preamble. 

“Lock-Up Agreement” shall mean a customary lock-up agreement with the underwriter(s) of a Public Offering restricting the
Person’s right to transfer any Ordinary Shares or any securities convertible into or exercisable or exchangeable for such Ordinary Shares or (b) enter into any swap or other arrangement that transfers to another any of the economic
consequences of ownership of Ordinary Shares. 

 “Ordinary Shares” shall mean the ordinary shares, $0.01 par value per share, of
the Company. 
 “Parity Shares” shall have the meaning set forth in Section 2.3.1. 

“Participating Investors” shall mean the Investors holding the majority of the Registrable Securities requested to be
included in any registration or underwritten Public Offering, as applicable.” 
 “Permitted Transferee” shall mean,
with respect to any Investor, any Affiliate of such Investor, to the extent such Person agrees in writing to be bound by the terms of this Agreement. 

“Person” shall mean any individual, partnership, corporation, company, association, trust, joint venture, limited liability
company, unincorporated organization, entity or division, or any government, governmental department or agency or political subdivision thereof. 

“Pro Rata Portion” shall mean for purposes of Section 2.3, with respect to each holder of Registrable Securities or
Parity Shares requesting that such shares be registered in such registration statement, a number of such shares equal to the aggregate number Ordinary Shares requested to be registered in such registration (excluding any shares to be registered for
the account of the Company) multiplied by a fraction, the numerator of which is the aggregate number of Registrable Securities and Parity Shares held by such holder, and the denominator of which is the aggregate number of Registrable Securities and
Parity Shares held by all holders requesting that their Registrable Securities or Parity Shares be registered in such registration. 

“Public Offering” shall mean a public offering and sale of Ordinary Shares for cash pursuant to an effective registration
statement under the Securities Act. 
 “Registrable Securities” shall mean (a) all Ordinary Shares and (b) all
securities directly or indirectly issued or issuable with respect to such Ordinary Shares by way of stock dividend or stock split or in connection with a combination of shares, recapitalization, merger, consolidation or other reorganization, in each
case constituting Shares. As to any particular Registrable Securities, such shares shall cease to be Registrable Securities when (i) a registration statement with respect to the sale of such securities shall have become effective under the
Securities Act and such securities shall have been disposed of in accordance with such registration statement, (ii) such securities have been Transferred pursuant to Rule 144 or Rule 145, (iii) the aggregate number of such securities held
by the applicable Holder and its Affiliates is less than the number that would subject the distribution thereof to any volume limitation or other restriction on transfer under Rule 144 and such holder is able to immediately distribute such
securities publicly without any restrictions on transfer without application of paragraphs (c), (e) (f) and (h) of Rule 144) (iv) such securities shall have been otherwise transferred to a Person and subsequent disposition of
them shall not require registration of them under the Securities Act and such securities may be distributed without volume limitation or other restrictions on transfer under Rule 144 or Rule 145 (including without application of paragraphs (c),
(e) (f) and (h) of Rule 144), or (v) such securities shall have ceased to be outstanding. 

 “Registration Expenses” means any and all expenses incident to performance of or
compliance with Section 2 of this Agreement (other than underwriting discounts and commissions paid to underwriters and transfer taxes, if any), including (a) all Commission, securities exchange and FINRA registration and filing fees,
(b) all fees and expenses of complying with securities or blue sky laws (including reasonable fees and disbursements of counsel for the underwriters in connection with blue sky qualifications of the Registrable Securities), (c) all
printing, messenger and delivery expenses, (d) all fees and expenses incurred in connection with the listing of the Registrable Securities on any securities exchange and obtaining FINRA clearance pursuant to Section 2.3.2(g) and all rating
agency fees, (e) the fees and disbursements of counsel for the Company and of its independent public accountants, including the expenses of any special audits and/or “cold comfort” letters required by or incident to such performance
and compliance, (f) the reasonable fees and disbursements of one counsel (plus counsel in each additional jurisdiction applicable to such Holder or the Company) for the Holders selected pursuant to the terms of Section 2 and one counsel
(plus counsel in each additional jurisdiction applicable to such Holder or the Company) for certain Holders selected pursuant to the second proviso of Section 2.3.3, if applicable, (g) any fees and disbursements customarily paid by the
issuers of securities, and (h) expenses incurred in connection with any road show (including the reasonable out-of-pocket expenses of the Holders). 

“Rule 144” shall mean Rule 144 under the Securities Act (or any successor Rule). 

“Rule 145” shall mean Rule 145 under the Securities Act (or any successor Rule). 

“Rule 145 Transaction” shall mean a registration on Form S-4 (or any successor Form) pursuant to Rule 145. 

“Sale” shall mean a Transfer for value and the terms “Sell” and “Sold” shall have correlative meanings.

 “Securities Act” shall mean the Securities Act of 1933, as in effect from time to time. 

“Shares” shall mean all Ordinary Shares held by an Investor, whenever issued. 

“Transfer” shall mean any sale, pledge, assignment, encumbrance or other transfer or disposition of any Shares to any other
Person, whether directly, indirectly, voluntarily, involuntarily, by operation of law, pursuant to judicial process or otherwise. 
  

	6.	MISCELLANEOUS. 

 6.1. Authority: Effect. Each party hereto represents and warrants
to and agrees with each other party that the execution and delivery of this Agreement and the consummation of the transactions contemplated hereby have been duly authorized on behalf of such party and do not violate any agreement or other instrument
applicable to such party or by which its assets are bound. This Agreement does not, and shall not be construed to, give rise to the creation of a partnership among any of the parties hereto, or to constitute any of such parties members of a joint
venture or other association. 

 6.2. Notices. Any notices and other communications required or permitted in this Agreement
shall be effective if in writing and (a) delivered personally, (b) sent by facsimile, or (c) sent by overnight courier, in each case, addressed as follows: 

If to the Company, to: 
 Trinseo
S.A. 
 1000 Chesterbrook Boulevard 

Suite 300 
 Berwyn, PA 19312 

Attention:     Curtis S. Shaw, 

                      Executive
Vice President, General Counsel and Corporate Secretary 
 Facsimile:     [     ] 

E-mail:          CShaw@styron.com 

With a copy to: 
 Ropes &
Gray LLP 
 800 Boylston Street 

Boston, MA 02199 Attention: Craig E. Marcus 

E-mail: craig.marcus@ropesgray.com 

If to the Investor, to: 
 Bain
Capital Everest Manager Holding SCA 
 9A, Parc d’Activité Syrdall 

L-5365 Munsbach 
 Grand
Duché de Luxembourg 
 Attn: Michel Plantevin 

E-mail: mplantevin@baincapital.com 

With a copy to: 
 Ropes &
Gray LLP 
 800 Boylston Street 

Boston, MA 02199 
 Attention:
Craig E. Marcus 
 E-mail: craig.marcus@ropesgray.com 

Notice to the holder of record of any shares of capital stock shall be deemed to be notice to the holder of such shares for all purposes
hereof. 
 Unless otherwise specified herein, such notices or other communications shall be deemed effective (a) on the date received,
if personally delivered, (b) on the date received if delivered by facsimile on a business day, or if not delivered on a business day, on the first business day thereafter and (b) two business days after being sent by overnight courier.
Each of the parties hereto shall be entitled to specify a different address by giving notice as aforesaid to each of the other parties hereto. 

 6.3. Binding Effect, Etc. This Agreement constitutes the entire agreement of the parties
with respect to its subject matter, supersede all prior or contemporaneous oral or written agreements or discussions with respect to such subject matter, and shall be binding upon and inure to the benefit of the parties hereto and thereto and their
respective heirs, representatives, successors and permitted assigns. Except as otherwise expressly provided herein, no Investor or other party hereto may assign any of its respective rights or delegate any of its respective obligations under this
Agreement without the prior written consent of the other parties hereto, and any attempted assignment or delegation in violation of the foregoing shall be null and void. 

6.4. Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of and be enforceable by the parties hereto
and their respective successors and assigns; provided that the provisions of this Agreement which are for the benefit of Investors are only assignable to, and enforceable by, a Permitted Transferee. 

6.5. Descriptive Heading. The descriptive headings of this Agreement are for convenience of reference only, are not to be considered a
part hereof and shall not be construed to define or limit any of the terms or provisions hereof. 
 6.6. Counterparts. This Agreement
may be executed in multiple counterparts, each of which shall be deemed an original, but all of which taken together shall constitute one instrument. 

6.7. Severability. In the event that any provision hereof would, under applicable law, be invalid or unenforceable in any respect, such
provision shall be construed by modifying or limiting it so as to be valid and enforceable to the maximum extent compatible with, and possible under, applicable law. The provisions hereof are severable, and in the event any provision hereof should
be held invalid or unenforceable in any respect, it shall not invalidate, render unenforceable or otherwise affect any other provision hereof. 

6.8. No Recourse. Notwithstanding anything that may be expressed or implied in this Agreement, the Company and each Investor covenant,
agree and acknowledge that no recourse under this Agreement or any documents or instruments delivered in connection with this Agreement shall be had against any current or future director, officer, employee, general or limited partner or member of
any Investor or of any Affiliate or assignee thereof, as such, whether by the enforcement of any assessment or by any legal or equitable proceeding, or by virtue of any statute, regulation or other applicable law, it being expressly agreed and
acknowledged that no personal liability whatsoever shall attach to, be imposed on or otherwise be incurred by any current or future officer, agent or employee of any Investor or any current or future member of any Investor or any current or future
director, officer, employee, partner or member of any Investor or of any Affiliate or assignee thereof, as such, for any obligation of any Investor under this Agreement or any documents or instruments delivered in connection with this Agreement for
any claim based on, in respect of or by reason of such obligations or their creation. 

	7.	GOVERNING LAW. 

 7.1. Governing Law. This Agreement and all claims arising out of
or based upon this Agreement or relating to the subject matter hereof shall be governed by and construed in accordance with the domestic substantive laws of the State of Delaware without giving effect to any choice or conflict of laws provision or
rule that would cause the application of the domestic substantive laws of any other jurisdiction. 
 7.2. Consent to Jurisdiction.
Each party to this Agreement, by its execution hereof, (a) hereby irrevocably submits to the exclusive jurisdiction of the state and federal courts sitting in the State of Delaware for the purpose of any action, claim, cause of action or suit
(in contract, tort or otherwise), inquiry, proceeding or investigation arising out of or based upon this Agreement or relating to the subject matter hereof, (b) hereby waives to the extent not prohibited by applicable law, and agrees not to
assert, and agrees not to allow any of its subsidiaries to assert, by way of motion, as a defense or otherwise, in any such action, any claim that it is not subject personally to the jurisdiction of the above-named courts, that its property is
exempt or immune from attachment or execution, that any such proceeding brought in one of the above-named courts is improper, or that this Agreement or the subject matter hereof or thereof may not be enforced in or by such court and (c) hereby
agrees not to commence or maintain any action, claim, cause of action or suit (in contract, tort or otherwise), inquiry, proceeding or investigation arising out of or based upon this Agreement or relating to the subject matter hereof or thereof
other than before one of the above-named courts nor to make any motion or take any other action seeking or intending to cause the transfer or removal of any such action, claim, cause of action or suit (in contract, tort or otherwise), inquiry,
proceeding or investigation to any court other than one of the above-named courts whether on the grounds of inconvenient forum or otherwise. Notwithstanding the foregoing, to the extent that any party hereto is or becomes a party in any litigation
in connection with which it may assert indemnification rights set forth in this agreement, the court in which such litigation is being heard shall be deemed to be included in clause (a) above. Notwithstanding the foregoing, any party to this
Agreement may commence and maintain an action to enforce a judgment of any of the above-named courts in any court of competent jurisdiction. Each party hereto hereby consents to service of process in any such proceeding in any manner permitted by
Delaware law, and agrees that service of process by registered or certified mail, return receipt requested, at its address specified pursuant to Section 8.2 hereof is reasonably calculated to give actual notice. 

7.3. WAIVER OF JURY TRIAL. TO THE EXTENT NOT PROHIBITED BY APPLICABLE LAW WHICH CANNOT BE WAIVED, EACH PARTY HERETO HEREBY WAIVES AND
COVENANTS THAT IT WILL NOT ASSERT (WHETHER AS PLAINTIFF, DEFENDANT OR OTHERWISE) ANY RIGHT TO TRIAL BY JURY IN ANY FORUM IN RESPECT OF ANY ISSUE OR ACTION, CLAIM, CAUSE OF ACTION OR SUIT (IN CONTRACT, TORT OR OTHERWISE), INQUIRY, PROCEEDING OR
INVESTIGATION ARISING OUT OF OR BASED UPON THIS AGREEMENT OR THE SUBJECT MATTER HEREOF OR IN ANY WAY CONNECTED WITH OR RELATED OR INCIDENTAL TO THE TRANSACTIONS CONTEMPLATED HEREBY, IN EACH CASE WHETHER NOW EXISTING OR HEREAFTER ARISING. EACH PARTY
HERETO ACKNOWLEDGES THAT IT HAS BEEN INFORMED BY THE OTHER PARTIES HERETO THAT THIS SECTION 7.3 CONSTITUTES A MATERIAL INDUCEMENT UPON WHICH THEY ARE RELYING AND WILL RELY IN ENTERING INTO THIS AGREEMENT. ANY PARTY HERETO MAY FILE AN ORIGINAL
COUNTERPART OR A COPY OF THIS SECTION 7.3 WITH ANY COURT AS WRITTEN EVIDENCE OF THE CONSENT OF EACH SUCH PARTY TO THE WAIVER OF ITS RIGHT TO TRIAL BY JURY. 

 7.4. Exercise of Rights and Remedies. No delay of or omission in the exercise of any
right, power or remedy accruing to any party as a result of any breach or default by any other party under this Agreement shall impair any such right, power or remedy, nor shall it be construed as a waiver of or acquiescence in any such breach or
default, or of any similar breach or default occurring later; nor shall any such delay, omission nor waiver of any single breach or default be deemed a waiver of any other breach or default occurring before or after that waiver. 

[Signature pages follow] 

 IN WITNESS WHEREOF, each of the undersigned has duly executed this Agreement (or caused
this Agreement to be executed on its behalf by its officer or representative thereunto duly authorized) under seal as of the date first above written. 
  

							
	COMPANY:	 		 	TRINSEO S.A.
				
		 		 	By:	 	  

		 		 	Name:	 	Christopher D. Pappas
		 		 	Title:	 	President and Chief Executive Officer

							
	INVESTORS:	 	BAIN CAPITAL EVEREST MANAGER HOLDING SCA
		 		 	By:	 	Bain Capital Everest Manager,
		 		 		 	its general partner
				
		 		 	By:	 	  

		 		 	Name:	 	
		 		 	Title:	 	Director
				
		 		 	By:	 	  

		 		 	Name:	 	
		 		 	Title:	 	DirectorEX-10.35

 Exhibit 10.35 

Styron 
 Restoration and
Elective Deferral Plan 
 Effective July 1, 2011 

 TABLE OF CONTENTS 

 

							
	 	  	Page	 
		
	 ARTICLE I PURPOSE AND EFFECTIVE DATE
	  	 	4	  
		
	 ARTICLE II DEFINITIONS
	  	 	5	  
			
	 2.01.
	  	 Administrator
	  	 	5	  
	 2.02.
	  	 Appeals Administrator
	  	 	5	  
	 2.03.
	  	 Base Salary
	  	 	5	  
	 2.04.
	  	 Beneficiary
	  	 	5	  
	 2.05.
	  	 Change of Control
	  	 	5	  
	 2.06.
	  	 Code
	  	 	6	  
	 2.07.
	  	 Company
	  	 	6	  
	 2.08.
	  	 Compensation Committee
	  	 	6	  
	 2.09.
	  	 Deferral Account
	  	 	6	  
	 2.10.
	  	 Deferred Amount
	  	 	6	  
	 2.11.
	  	 Discretionary Company Contribution
	  	 	6	  
	 2.12.
	  	 Domestic Partner
	  	 	6	  
	 2.13.
	  	 Effective Date
	  	 	6	  
	 2.14.
	  	 Eligible Compensation
	  	 	6	  
	 2.15.
	  	 Eligible Employee
	  	 	6	  
	 2.16.
	  	 Employer
	  	 	7	  
	 2.17.
	  	 Entry Date
	  	 	7	  
	 2.18.
	  	 ERISA
	  	 	7	  
	 2.19.
	  	 Form of Payment
	  	 	7	  
	 2.20.
	  	 Hardship Withdrawal
	  	 	7	  
	 2.21.
	  	 Hypothetical Investment Benchmark
	  	 	7	  
	 2.22.
	  	 Initial Claims Reviewer
	  	 	7	  
	 2.23.
	  	 Matching Contribution
	  	 	7	  
	 2.24.
	  	 Participant
	  	 	8	  
	 2.25.
	  	 Participation Agreement
	  	 	8	  
	 2.26.
	  	 Performance Awards
	  	 	8	  
	 2.27.
	  	 Performance-Based Compensation
	  	 	8	  
	 2.28.
	  	 Plan
	  	 	8	  
	 2.29.
	  	 Plan Year
	  	 	8	  
	 2.30.
	  	 Separation from Service
	  	 	8	  
	 2.31.
	  	 Specified Employee
	  	 	9	  
	 2.32.
	  	 Styron 401(k) Plan
	  	 	9	  
	 2.33.
	  	 Unforeseeable Emergency
	  	 	9	  
	 2.34.
	  	 Valuation Date
	  	 	9	  
		
	 ARTICLE III ADMINISTRATION
	  	 	10	  
			
	 3.01.
	  	 Duties and Powers of the Administrator
	  	 	10	  
	 3.02.
	  	 Designation of Additional Administrators and Delegation of Administrative Responsibilities
	  	 	10	  
	 3.03.
	  	 Decisions of Administrators
	  	 	11	  
	 3.04.
	  	 Indemnification of Administrators
	  	 	11	  
	 3.05.
	  	 Claim Procedure
	  	 	11	  
	 3.06.
	  	 Commencement of Legal Action
	  	 	13	  
	 3.07.
	  	 Forum Selection
	  	 	13	  

							
		
	 ARTICLE IV PARTICIPATION
	  	 	14	  
			
	 4.01.
	  	 Participation
	  	 	14	  
	 4.02.
	  	 Contents of Participation Agreement
	  	 	15	  
	 4.03.
	  	 Modification or Revocation of Election by Participant
	  	 	16	  
		
	 ARTICLE V DEFERRED COMPENSATION
	  	 	17	  
			
	 5.01.
	  	 Elective Deferred Compensation
	  	 	17	  
	 5.02.
	  	 Vesting of Deferral Accounts
	  	 	17	  
		
	 ARTICLE VI MAINTENANCE AND INVESTMENT OF ACCOUNTS
	  	 	18	  
			
	 6.01.
	  	 Maintenance of Accounts
	  	 	18	  
	 6.02.
	  	 Hypothetical Investment Benchmarks
	  	 	18	  
	 6.03.
	  	 Statement of Accounts
	  	 	18	  
	 6.04.
	  	 No Investment Required
	  	 	18	  
		
	 ARTICLE VII BENEFITS
	  	 	19	  
			
	 7.01.
	  	 Time and Form of Payment
	  	 	19	  
	 7.02.
	  	 Survivor Benefit
	  	 	20	  
	 7.03.
	  	 Hardship Withdrawals
	  	 	21	  
	 7.04.
	  	 Matching Contribution
	  	 	21	  
	 7.05.
	  	 Discretionary Company Contributions
	  	 	21	  
	 7.06.
	  	 Supplemental Company Contributions
	  	 	22	  
	 7.07.
	  	 Withholding of Taxes
	  	 	22	  
	 7.08.
	  	 Distribution upon Inclusion in Income
	  	 	23	  
		
	 ARTICLE VIII BENEFICIARY DESIGNATION
	  	 	24	  
			
	 8.01.
	  	 Beneficiary Designation
	  	 	24	  
	 8.02.
	  	 No Beneficiary Designation
	  	 	24	  
		
	 ARTICLE IX AMENDMENT AND TERMINATION OF PLAN
	  	 	25	  
			
	 9.01.
	  	 Company’s Right to Amend
	  	 	25	  
	 9.02.
	  	 Company’s Right to Terminate
	  	 	25	  
	 9.03.
	  	 Employer’s Right to Cease Participation
	  	 	25	  
	 9.04.
	  	 Effect of Amendment or Termination
	  	 	25	  
		
	 ARTICLE X MISCELLANEOUS
	  	 	27	  
			
	 10.01.
	  	 Unfunded Plan
	  	 	27	  
	 10.02.
	  	 Nonassignability
	  	 	27	  
	 10.03.
	  	 Corporate Action
	  	 	27	  
	 10.04.
	  	 Validity, Severability and Integration
	  	 	27	  
	 10.05.
	  	 Employment Status
	  	 	28	  
	 10.06.
	  	 Facility of Payment
	  	 	28	  
	 10.07.
	  	 Effect on Other Benefit Plans
	  	 	28	  
	 10.08.
	  	 Successors
	  	 	28	  
	 10.09.
	  	 Waiver of Breach
	  	 	28	  
	 10.10.
	  	 Notice
	  	 	29	  
	 10.11.
	  	 Gender and Number
	  	 	29	  
	 10.12.
	  	 Headings
	  	 	29	  
	 10.13.
	  	 Governing Law
	  	 	29	  
	 10.14.
	  	 Successor Titles or Positions
	  	 	29	  
	 10.15.
	  	 Section 409A Compliance
	  	 	29	  

  
 - ii - 

 ARTICLE I 

PURPOSE AND EFFECTIVE DATE 

The intended purpose of the Styron Restoration and Elective Deferral Plan (the “Plan”) is to aid Styron LLC (the “Company”) and its
subsidiaries in retaining and attracting a select group of eligible management and highly compensated employees by providing deferred compensation opportunities to such employees. The Plan is intended to provide eligible employees with (1) the
opportunity to elect to defer receipt of specified portions of compensation and (2) certain deferred compensation that cannot be provided under the Company’s tax-qualified defined contribution plan due to applicable limitations on
compensation and benefits under that plan, and to have these deferred amounts treated as if invested in specified Hypothetical Investment Benchmarks. Deferred amounts so treated could, therefore, increase or decrease in value during the period of
time such amounts are treated as so invested depending on the performance of the Hypothetical Investment Benchmarks. The benefits provided under the Plan are intended to be provided in consideration for services to be performed after the effective
date of the Plan, but prior to a participating employee’s Separation from Service. Any references to “plan document” with respect to this Plan is a reference to the document herein. 

The portion of the Plan maintained for the purpose of providing benefits to Participants in excess of the limitations on contributions imposed by section 415
of the Code is intended to be an “excess benefit plan” as defined in section 3(36) of ERISA. The remainder of the Plan is intended to constitute an unfunded, deferred compensation arrangement established and maintained primarily for the
purpose of providing deferred compensation to a select group of management or highly compensated employees, as described in sections 201(2), 301(a)(3) and 401(a)(1) of ERISA. The Company intends for the Plan, as described herein and as may be
subsequently amended from time to time, to be interpreted and operated in a manner such that amounts and benefits under the Plan are and will not become subject to one or more of (1) the gross income inclusion set forth within
Section 409A(a)(1)(A) of the Code, (2) the interest and additional tax set forth within Section 409A(a)(1)(B) of the Code or (3) any and all similar state or local gross income inclusion, taxes or interest (collectively, the
“Section 409A Penalties”). Nevertheless, responsibility for all federal, state, local or other tax consequences that result from participation in or the receipt of amounts or benefits under the Plan, including, if applicable, the
Section 409A Penalties, shall rest exclusively with the applicable Participant, Beneficiary or other recipients of amounts or benefits under the Plan without any right to gross-up or indemnification of any kind with respect to such consequences
from the Company or any Employer. 
 The Plan shall be effective on July 1, 2011 (the “Effective Date”). 

  
 - 4 - 

 ARTICLE II 

DEFINITIONS 
 For the purposes of
this Plan, the following words and phrases shall have the meanings indicated, unless the context clearly indicates otherwise: 
  

	2.01.	Administrator 

 “Administrator” means the committee of one or more persons
designated, from time to time, by the Company in accordance with Section 3.02, or the authorized delegate of the Administrator. In the absence of designation of any such committee, the Administrator shall be the Senior Vice President Human
Resources. For purposes of Sections 3.01, 3.03 and 3.04, the Administrator shall also include the Appeals Administrator and the Initial Claims Reviewer. 
  

	2.02.	Appeals Administrator 

 “Appeals Administrator” means the Administrator or its
delegate for this purpose or such other person, group of persons or entity that may be designated by the Company in accordance with Section 3.02. In the absence of designation of a committee under Sections 2.01 and 3.02 to serve as
Administrator or designation of any other person, group of persons or entity to serve as Appeals Administrator in accordance with this Section and Section 3.02, the Appeals Administrator shall be the Compensation Committee. 

 

	2.03.	Base Salary 

 “Base Salary” means the annual base rate of pay from the Employer
at which a Participant is employed (excluding Performance Awards, commissions, relocation expenses, and other non-regular forms of compensation) before deductions under (A) deferrals pursuant to Section 4.02 and (B) contributions made
on his or her behalf to any qualified plan maintained by the Employer or to any cafeteria plan under Code section 125 maintained by the Employer. 
  

	2.04.	Beneficiary 

 “Beneficiary” means the person, persons or entity designated by
the Participant to receive any benefits payable under the Plan pursuant to Article VIII. 
  

	2.05.	Change of Control 

 “Change of Control” means a transaction with respect to the
Employer or Company that constitutes a change in ownership of the Employer or Company, a change in effective control of the Employer or Company, or a change in the ownership of a substantial portion of the assets of the Employer or Company
(collectively, a “change in control event”), each as defined for purposes of section 409A(a)(2)(A)(v) of the Code and the regulations promulgated thereunder. 

  
 - 5 - 

	2.06.	Code 

 “Code” means the Internal Revenue Code of 1986, as amended. 

 

	2.07.	Company 

 “Company” means Styron LLC, its successors, and any assigns. 

 

	2.08.	Compensation Committee 

 “Compensation Committee” means the Compensation
Committee of the Board of Directors of Styron LLC. 
  

	2.09.	Deferral Account 

 “Deferral Account” means the notional account established
for record keeping purposes for each Participant pursuant to Article VI. 
  

	2.10.	Deferred Amount 

 “Deferred Amount” means the amount deferred pursuant to
Section 4.02. 
  

	2.11.	Discretionary Company Contribution 

 “Discretionary Company Contribution” means
an amount credited to a Participant’s Deferral Account pursuant to Section 7.07. 
  

	2.12.	Domestic Partner 

 “Domestic Partner” means a person who is a member of a
“Domestic Partnership” as defined in the Styron 401(k) Plan. 
  

	2.13.	Effective Date 

 “Effective Date” means the date set forth as Effective Date
within Article I. 
  

	2.14.	Eligible Compensation 

 “Eligible Compensation” means any Base Salary and
actual Performance Awards payable to a Participant to the extent the Participant is on the U.S. payroll of the Employer at the time the amount would have otherwise been paid to the Participant. 

 

	2.15.	Eligible Employee 

 “Eligible Employee” means an employee of any Employer who:

  

	 	a.	is a United States employee or an expatriate who is paid from the Company or one of the Company’s U.S. subsidiaries that is an Employer hereunder, 

 

	 	b.	is a member of the functional specialist/functional leader or global leadership job families, 

  

	 	c.	has a job level of 362 points or higher, 

  
 - 6 - 

	 	d.	is eligible for participation in the Styron 401(k) Plan, 

  

	 	e.	is designated by the Administrator as eligible to participate in the Plan as of September 30 for deferral of Base Salary and Performance Awards, and 

 

	 	f.	qualifies and designated by the Administrator as a member of the “select group of management or highly compensated employees” under ERISA. 

 

	2.16.	Employer 

 “Employer” means the Company and any subsidiary or affiliated
organization that is treated as a single employer with the Company under section 414(b) or section 414(c) of the Code. 
  

	2.17.	Entry Date 

 “Entry Date” means (i) the initial Entry Date of July 1,
2011, and (ii) thereafter, the January 1 and July 1 of each Plan Year. 
  

	2.18.	ERISA 

 “ERISA” means the Employee Retirement Income Security Act of 1974, as
amended. 
  

	2.19.	Form of Payment 

 “Form of Payment” means payment in a single lump sum or in
substantially equal annual installments over 5 or 10 years. 
  

	2.20.	Hardship Withdrawal 

 “Hardship Withdrawal” means the early payment of all or
part of the balance in a Deferral Account(s) in the event of an Unforeseeable Emergency. 
  

	2.21.	Hypothetical Investment Benchmark 

 “Hypothetical Investment Benchmark” shall
mean the phantom investment benchmarks that are used to measure the return credited to a Participant’s Deferral Account(a). 
  

	2.22.	Initial Claims Reviewer 

 “Initial Claims Reviewer” means the person, group of
persons or entity responsible for deciding benefit claims under the Plan, as described in DOL Reg. s. 2560.503-1(e) (i.e., first level claims for benefits). The Initial Claims Reviewer is the Administrator or such other person, group of persons or
entity who may be designated Initial Claims Reviewer by the Company in accordance with Section 3.02. 
  

	2.23.	Matching Contribution 

 “Matching Contribution” means the amount of annual
matching contribution credited to a Participant’s Deferral Account pursuant to Section 7.06. 

  
 - 7 - 

	2.24.	Participant 

 “Participant” means, during any Plan Year, any Eligible Employee
who makes an election to participate in this Plan during such Plan Year by filing a Participation Agreement as provided in Article IV or who otherwise receives a Discretionary Company Contribution described in Section 7.07 with respect to such
Plan Year. 
  

	2.25.	Participation Agreement 

 “Participation Agreement” means an agreement filed by
a Participant in accordance with Article IV. 
  

	2.26.	Performance Awards 

 “Performance Awards” means the amount paid in cash to the
Participant by the Employer in the form of annual incentive bonuses for a Plan Year (provided that such amount is Eligible Compensation). 
  

	2.27.	Performance-Based Compensation 

 “Performance Based Compensation” means a
Performance Award that is “performance based compensation” as such term is defined for purposes of section 409A(a)(4)(B)(iii) of the Code, which definition, until modified or superseded, is set forth in Treas. Reg. section 1.409A-1(e).

  

	2.28.	Plan 

 “Plan” means the Styron Restoration and Elective Deferral Plan as set
forth herein, together with any and all subsequent amendments hereto. 
  

	2.29.	Plan Year 

 “Plan Year” means a twelve-month period beginning January 1
and ending the following December 31, except with respect to the 2011 Plan Year, which means the period starting on the Effective Date and ending on December 31, 2011. 

 

	2.30.	Separation from Service 

 “Separation from Service” or “Separates from
Service” means a Participant’s “separation from service” from the Employer (and all members of its controlled group) as defined for purposes of section 409A(a)(2)(A)(i) of the Code and the final regulations promulgated
thereunder, meaning that in applying section 1563(a)(1), (2), and (3) of the Code for purposes of determining a controlled group of corporations under section 414(b) and (c) of the Code, and in applying Treasury Regulation section
1.414(c)-2 for purposes of determining trades or businesses that are under common control under section 414(c) of the Code, the language “at least 50 percent” is used instead of “at least 80 percent” each place it appears in
accordance with the definition of such term under final Code section 409A regulations. 

  
 - 8 - 

	2.31.	Specified Employee 

 “Specified Employee” means, with respect to the Plan, a
“specified employee” as such term is defined in section 409A(a)(2)(B)(i) of the Code and the regulations promulgated thereunder. 
  

	2.32.	Styron 401(k) Plan 

 “Styron 401(k) Plan” means the Styron 401(k) Plan, as
amended from time to time or any successor plan thereto. 
  

	2.33.	Unforeseeable Emergency 

 “Unforeseeable Emergency” means an
“unforeseeable emergency” with respect to a Participant as such term is defined for purposes of section 409A(a)(2)(A)(vi) of the Code, which definition is set forth within section 409A(a)(2)(B)(ii) of the Code and, until modified or
superseded, Treas. Reg. §1.409A-3(i)(3), which generally includes a severe financial hardship to the Participant resulting from an illness or accident of the Participant, the Participant’s spouse, or a dependent (as defined in section
152(a) of the Code) of the Participant loss of the Participant’s property due to casualty, or other similar extraordinary and unforeseeable circumstances arising as a result of events beyond the control of the Participant as determined by the
Administrator in its sole and absolute discretion. 
  

	2.34.	Valuation Date 

 “Valuation Date” means the last calendar date when the New
York Stock Exchange was open. 

  
 - 9 - 

 ARTICLE III 

ADMINISTRATION 
  

	3.01.	Duties and Powers of the Administrator 

 The Administrator shall be responsible for the
administration of the Plan and to ensure that the Plan is carried out in accordance with its terms. 
 Except as provided in
Section 3.02, the responsibility and discretionary authority of the Administrator shall include, but shall not be limited to, the following duties and powers: 
  

	 	a.	To promulgate and enforce such rules and regulations and prescribe the use of such forms as he shall deem necessary or appropriate for the proper and efficient administration of the Plan; 

 

	 	b.	To interpret the Plan and to resolve any possible ambiguities, inconsistencies and omissions therein or therefrom; 

  

	 	c.	To decide all questions concerning the Plan, including, without limitation, eligibility for benefits and the amount of benefits, if any, payable under the Plan from time to time; 

 

	 	d.	To prepare and disseminate communications to Participants and Beneficiaries as are necessary or appropriate to properly administer the Plan; and 

 

	 	e.	To retain third party administrators, consultants, accountants and other individuals or entities as he deems necessary or advisable to assist him in fulfilling his responsibilities under the Plan, consistent with the
Company’s guidelines on hiring and retention of outside service providers; and monitor the performance of such individuals and entities, decide whether to discontinue the services of such individuals and entities, and make payment to such
individuals and entities in accordance with the terms of the plan document. 

  

	3.02.	Designation of Additional Administrators and Delegation of Administrative Responsibilities 

The Company may designate one or more persons or entities to serve as an Administrator of the Plan, in addition to or in lieu of the
Administrator named in the plan document, through action of the Compensation Committee. Any such designation of additional Administrators shall set forth in general or specific terms such person’s or entity’s responsibilities and
authority. 
 In addition, each Administrator may designate other persons to carry out its responsibilities under the Plan in a writing that
sets forth the responsibilities assigned to the delegate and, if applicable, the period for which such delegation shall be in effect. 

  
 - 10 - 

	3.03.	Decisions of Administrators 

  

	 	a.	Each Administrator shall have the sole and absolute discretion to interpret the plan document, make findings of fact, operate, administer and decide any matters arising with respect to the Plan, and may adopt such rules
and procedures as it deems necessary, desirable or appropriate in the administration of the Plan. All rules and decisions of such Administrators shall be final, conclusive and binding on all persons having an interest in the Plan. 

 

	 	b.	Any determination by an Administrator shall be final, conclusive and binding on all parties. If challenged in court, such determination shall not be subject to de novo review and shall not be overturned
unless proven to be arbitrary and capricious based upon the evidence presented to the Administrator at the time of its determination. 

  

	3.04.	Indemnification of Administrators 

 The Company agrees to indemnify and to defend to the
fullest extent permitted by law any employee or former employee of the Company or entity within the Company’s controlled group (a controlled group of corporations or trades or businesses within the meaning of section 414(b) or section 414(c) of
the Code) who is serving or has served as an Administrator or who is acting or has acted on behalf of an Administrator against all liabilities, damages, costs and expenses (including attorneys’ fees and amounts paid in settlement of any claims
approved by the Company) occasioned by any act or omission to act in connection with the Plan, if such act or omission is in good faith. This limitations period replaces and supersedes any limitation period ending at a later time that might
otherwise be deemed applicable under state or federal law in the absence of this Section 3.04. 
  

	3.05.	Claim Procedure 

 If a Participant or Beneficiary or any other person on behalf of either
or who otherwise claims to be eligible for benefits under this Plan (in each case, referred to herein as the “claimant”) makes a written request alleging a right to receive payments under this Plan or alleging a right to receive an
adjustment in benefits being paid under this Plan, such actions shall be treated as a claim for benefits. To be considered, any claim for benefits (including any written request alleging a right to receive payments or an adjustment as described in
the last sentence) must be set forth in writing and received by the Initial Claims Reviewer or its designee no later than the date that is ninety (90) days after the latest date on which payment of the benefit would have been timely made under
the plan and the regulations under Code Section 409A. Upon receipt of a timely claim for benefits, benefits under this Plan shall be payable only if the Initial Claims Reviewer or the Appeals Administrator, as the case may be, determines, in
its sole discretion, that a claimant is entitled to them. For purposes of this Section 3.05, the Initial Claims Review and the Appeals Administrator shall each be an “Administrator” for purposes of the Plan with all responsibility and
discretionary authority described in Sections 3.01 and 3.03 as necessary to carry out its duties under this Section 3.05. 
  

	 	a.	 All initial claims for benefits under this Plan shall be sent to the Initial Claims Reviewer. If the Initial Claims Reviewer determines that any
individual who has claimed a right to receive benefits, or different benefits, under this Plan is not 

  
 - 11 - 

	 	
entitled to receive all or any part of the benefits claimed, the Initial Claims Reviewer shall inform the claimant in writing of such determination and the reasons therefore in terms calculated
to be understood by the claimant. The notice shall be sent within 90 days after receipt of the claim unless the Initial Claims Reviewer determines that additional time, not exceeding 90 additional days, is needed and so notifies the claimant in
writing before the expiration of the initial 90 day period. Any written notice of extension for review shall include the circumstances requiring extension and date by which a decision is expected to be rendered. A written notice of denial of
benefits shall (i) state specific reasons for the denial, (ii) make specific reference to the pertinent Plan provisions on which the denial is based, (iii) describe any additional material or information that is necessary to support
the claimant’s claim and an explanation of why such material or information is necessary, and (iv) include a statement that the claimant is entitled to receive, upon request and free of charge, reasonable access to, and copies of all
documents, records or other information relevant (as defined by Labor Reg. section 2560.503-1(m)) to the claim. Such notice shall, in addition, inform the claimant of the procedure that the claimant should follow to take advantage of the review
procedures set forth below in the event the claimant desires to contest the denial of the claim, including the time limits applicable to such procedures and the right to bring a civil action under section 502(a) of ERISA following exhaustion of
review procedures set forth herein. 

  

	 	b.	 The claimant may within 60 days after receipt of a notice of denial submit, in writing, to the Appeals Administrator a notice that the claimant
contests the denial of his or her claim and desires a further review by the Appeals Administrator. During the review process, the claimant has the right to submit written comments, documents, records and other information relating to the claim for
benefits, which the Appeals Administrator shall consider without regard to whether the items were considered upon the initial review. The Appeals Administrator shall within 60 days thereafter review the claim and authorize the claimant to, upon
request and free of charge, have reasonable access to, and copies of all documents, records or other information relevant (as defined by Labor Reg. section 2560.503-1(m)) to the claim. The Appeals Administrator will render a final decision on behalf
of the Plan with respect to the claim, which decision shall include the specific reasons therefor in writing and will transmit such decision to the claimant within 60 days after receipt of the written request for review, unless the Appeals
Administrator determines that additional time, not exceeding 60 days, is needed, and so notifies the claimant in writing before the expiration of the initial 60 day period. In no event shall the Appeals Administrator render a final decision later
than the initial 60 days plus the possible additional 60 days following receipt of the claimant’s appeal. Any written notice of extension for review shall include the circumstances requiring extension and date by which a decision is expected to
be rendered. A written notice of denial of benefits upon review shall (i) state specific reasons for the denial, (ii) make specific reference to the pertinent Plan provisions on which the denial is based, and (iii) include a statement
that the claimant is entitled to receive, upon request and free of charge, reasonable access to, and copies of all documents, records or other information relevant (as defined by Labor Reg. section 2560.503-1(m)) to the claim. Such notice shall, in
addition, inform the claimant of the right to bring a civil action under section 502(a) of ERISA. If such determination is adverse to the claimant, it shall be binding and conclusive unless the claimant notifies the Appeals

  
 - 12 - 

	 	
Administrator within 90 days after the mailing or delivery to him or her by the Appeals Administrator of its determination that he or she intends to institute legal proceedings challenging the
determination of the Appeals Administrator, and actually institutes such legal proceeding within the applicable limitations period described in Section 3.06 below. 

 

	3.06.	Commencement of Legal Action 

 A claim for benefits under the Plan (including a claim
that the claimant is eligible to participate in the Plan) may not be filed in any court: 
  

	 	a.	if the claimant has not complied with the six (6) month period described in the first paragraph of Section 3.05 above; and 

 

	 	b.	until the claimant has fully exhausted the claims review procedures described in Section 3.05 above, including complying with the 90-day notice requirement in Section 3.05(b), and 

 

	 	c.	unless such claim is filed in a court with jurisdiction over such claim no later than the earlier of: 

  

	 	1.	180 days after the mailing or delivery of the adverse determination by the Appeals Administrator, or 

  

	 	2.	two (2) years after (i) the date the first benefit payment was allegedly due, or (ii) the date the Plan first repudiated its alleged obligation to provide such benefits or coverage (regardless of whether
such repudiation occurred before or during the administrative review process), whichever is earlier. 

 This limitations period
replaces and supersedes any limitation period ending at a later time that might otherwise be deemed applicable under state or federal law in the absence of this Section 3.06. 

 

	3.07.	Forum Selection 

 To the fullest extent permitted by law, any putative class action
lawsuit relating to the Plan shall be filed in the in U.S. District Court for the Eastern District of Pennsylvania. If any such putative class action is filed in a different jurisdiction, or if any non-class action filed in a different jurisdiction
is subsequently amended or altered to include class action allegations, then the Plan, all parties to such action that are related to the Plan (such as the Administrator) and all alleged Participants and Beneficiaries shall take all necessary steps
to have the action removed to, transferred to or re-filed in a jurisdiction described in the first sentence of this Section 3.07. This provision does not relieve any putative class member from any obligation existing under the Plan or by law to
exhaust administrative remedies before initiating litigation. 

  
 - 13 - 

 ARTICLE IV 

PARTICIPATION 
 4.01.
Participation 
  

	 	a.	Generally. Except as otherwise provided in this Section 4.01, participation in the Plan during each Plan Year shall be limited to Eligible Employees who elect to participate in this Plan with respect to such
Plan Year by filing a Participation Agreement with the Administrator in such form as the Administrator may require and in accordance with the Company’s enrollment procedures as the Administrator shall establish from time to time. A
Participation Agreement normally must be filed on or prior to the December 31 (Eastern Standard Time) immediately preceding the Plan Year in which the Eligible Compensation to which the Participation Agreement relates is earned. An individual
shall not be eligible to elect to participate in this Plan unless the individual qualifies as an Eligible Employee for the Plan Year for which the election is made. 

 

	 	b.	Initial Plan Year. Participation in the Plan during the 2011 Plan Year shall be limited to Eligible Employees who elect to participate in this Plan with respect to such Plan Year by filing a Participation
Agreement with the Administrator before the initial Entry Date. Deferral of the 2011 Performance Award shall be permitted to the extent such Performance Award qualifies as Performance-Based Compensation and only with respect to Eligible Employees
who were employed by the Company during all of 2011. Deferral of Base Salary shall relate to Base Salary earned after the initial Entry Date. 

  

	 	c.	First Year of Eligibility. Except as otherwise provided in Section 4.01 and to the extent permitted by Code section 409A and the regulations or other guidance issued thereunder, an employee will become a
Participant in the Plan on the first Entry Date on which such employee is an Eligible Employee provided that such Eligible Employee submits a Participation Agreement within 30 days after the such Entry Date and, provided, further, that deferrals
shall commence as soon as practical thereafter for Eligible Compensation earned during such Plan Year after the Administrator receives a completed and timely submitted Participation Agreement. Except as otherwise provided in Section 4.01(b),
any deferral of a Performance Award effective after the first day of the applicable performance period shall apply only to the pro-rata portion of the Performance Award determined by multiplying the Performance Award by a fraction, the numerator of
which is the number of days remaining in the applicable performance period after receipt of the election and the denominator of which is the total number of days in the applicable performance period. 

 

	 	d.	 Discretionary Company Contributions and Supplemental Company Contributions. Notwithstanding the foregoing, an Eligible Employee who receives a
Discretionary Company Contribution under Section 7.05 with respect to any Plan Year shall also be a Participant under this Plan with respect to such Plan Year, without respect to whether such Eligible Employee filed a Participation Agreement
with the Administrator with respect to such Plan Year. For purposes of Discretionary Company Contributions, unless already a Participant in the Plan, an Eligible Employee is treated as initially eligible to participate in the Plan, and

  
 - 14 - 

	 	
will become a Participant in the Plan, as of the first day of the Eligible Employee’s taxable year immediately following the first Plan Year with respect to which the Eligible Employee
accrued a Discretionary Company Contribution and, to the extent permitted by Code section 409A and the regulations or other guidance issued thereunder, the Administrator may permit such an Eligible Employee to complete a Participation Agreement
during the first 30 days following the date the Eligible Employee first becomes a Participant under the Plan for purposes of Discretionary Company Contributions and apply such elections set forth therein to any Discretionary Company Contributions
then accrued under the Plan including for services performed prior to the date of the elections. Unless already a Participant, an Eligible Employee who is credited with a Supplemental Company Contribution under Section 7.06 shall become a
Participant on the date such Supplemental Company Contribution is credited and the Administrator may permit such an Eligible Employee to complete a Participation Agreement during the first 30 days following the date the Eligible Employee first
becomes a Participant. 

  

	 	e.	Limitations. Except as otherwise set forth within this Section 4.01, under no circumstances shall the Administrator accept any Participation Agreement with respect to a Plan Year later than the last day of
the Plan Year immediately preceding such Plan Year (or, if later, the last day permitted under Section 409A and applicable guidance thereunder) and any such Participation Agreement shall become irrevocable for a Plan Year as of the date
specified by the Administrator or, if none, as of the last day of the preceding Plan Year (or, if later, the last day permitted under Section 409A and applicable guidance thereunder). If an Eligible Employee who would otherwise be a Participant
with respect to a particular Plan Year fails to make an election with respect to any Deferred Amount during such Plan Year before elections become irrevocable for such Plan Year in accordance with the preceding sentence, then the Participant shall
be deemed to have elected not to defer any Eligible Compensation during such Plan Year. 

 4.02. Contents of Participation Agreement

  

	 	a.	 Generally. Subject to Article VII, each Participation Agreement shall set forth the amount of Eligible Compensation for the Plan Year to which
the Participation Agreement relates that is to be deferred under the Plan (the “Deferred Amount”), expressed as a percentage of the Base Salary and/or Performance Awards for such Plan Year; provided, that the minimum Deferred Amount for
any Plan Year shall not be less than 1% (increased in 1% increments) of Base Salary and/or 1% (increased in 1% increments) of any Performance Award and the maximum Deferred Amount for any Plan Year shall not exceed 75% of Base Salary and 100% of any
Performance Award. In accordance with the provisions contained in Article VII, each Participation Agreement shall also set forth a time and Form of Payment of the Deferred Amount with respect to the Plan Year. To the extent permitted by the
Administrator and timely elected by a Participant within a Participation Agreement for such Plan year, a Participant may elect a different time and Form of Payment for each of (i) the portion of a Participant’s Deferral Account
attributable to Deferred Amounts determined based upon Base Salary, and (ii) the portion of any Deferral Account attributable to Deferred Amounts based upon Performance Awards. Participation Agreements are to be completed

  
 - 15 - 

	 	
in a format specified by the Administrator and may also permit such other elections and contain such other terms, in the Administrator’s sole discretion, as are not inconsistent with the
Plan document or applicable law. 

  

	 	b.	Default Election. Notwithstanding the foregoing, to the extent that a Participant shall have failed, in the applicable Participation Agreement, to properly or timely designate the time or Form of Payment of the
portion of a Participant’s Deferral Account attributable to a Deferred Amount (or portion thereof) with respect to any Plan Year, the time and Form of Payment, to the extent of the failure, shall be as described in Section 7.01(e).

 4.03. Modification or Revocation of Election by Participant 

A Participant may not change the amount of his or her Deferred Amount with respect to any Plan Year after his or her Participation Agreement
becomes irrevocable in accordance with this Article. Once, irrevocable, a Participant’s Participation Agreement may not be made, modified or revoked retroactively. 

  
 - 16 - 

 ARTICLE V 

DEFERRED COMPENSATION 
 5.01.
Elective Deferred Compensation 
 The Deferred Amount of a Participant with respect to each Plan Year of participation in the Plan shall
be credited to the Participant’s applicable Deferral Account within a reasonable period following the date such Deferred Amount would otherwise have been paid to the Participant absent a deferral election hereunder, which crediting date shall
be as set forth on the Participant’s statement of his or her Deferral Account(s) hereunder. A Discretionary Company Contribution with respect to a Plan Year to which a Participant may become entitled shall be credited to the Participant’s
applicable Deferral Account within the time period specified under Section 7.05. A Supplemental Company Contribution to which a Participant may become entitled shall be credited to the Participant’s applicable Deferral Account within the
time period specified under Section 7.06. To the extent that any Employer is required to withhold any taxes or other amounts with respect to the Deferred Amount pursuant to any state, Federal or local law, such amounts shall be taken out of
other compensation eligible to be paid to the Participant that is not deferred under this Plan. 
 5.02. Vesting of Deferral Accounts 

A Participant shall be 100% vested in his or her Deferral Account(s). 

  
 - 17 - 

 ARTICLE VI 

MAINTENANCE AND INVESTMENT OF ACCOUNTS 

6.01. Maintenance of Accounts 
 Separate
Deferral Accounts shall be maintained for each Participant. More than one Deferral Account may be maintained for a Participant as necessary to reflect (a) amounts attributable to Deferred Amounts during one or more Plan Years, (b) amounts
attributable to Matching Contributions, Discretionary Company Contributions, and/or Supplemental Company Contributions, and/or (c) various Hypothetical Investment Benchmarks. A Participant’s Deferral Account(s) shall be utilized solely as
a device for the measurement and determination of the amounts to be paid to the Participant pursuant to this Plan, and shall not constitute or be treated as a trust fund of any kind. The Administrator shall determine the balance of each Deferral
Account, as of each Valuation Date, by adjusting the balance of such Deferral Account as of the immediately preceding Valuation Date to reflect changes in the value of the deemed investments thereof, credits and debits pursuant to Section 6.02,
Section 7.04, Section 7.05, and Section 7.06, and distributions pursuant to Article VII with respect to such Deferral Account since the preceding Valuation Date. 

6.02. Hypothetical Investment Benchmarks 

Each Participant shall designate from time to time, in such manner and in accordance with such limitations as the Administrator shall
designate, how the credits to his or her Deferral Account(s) shall be deemed to be invested in one or more Hypothetical Investment Benchmarks. Notwithstanding anything to the contrary herein, hypothetical earnings and losses based on a
Participant’s investment elections shall begin to accrue as of the date such Participant’s Deferred Amounts, Matching Contributions, any Discretionary Company Contributions, or any Supplemental Company Contributions are credited to his or
her Deferral Account(s). Participants can reallocate among the Hypothetical Investment Benchmarks on a daily basis at any time that the New York Stock Exchange is open for trading. In the event a Participant has not made a proper designation in the
manner specified by the Administrator, the Participant shall be deemed to have designated the current default fund as chosen by the Administrator prior to the beginning of the Plan Year. 

6.03. Statement of Accounts 
 Each
Participant shall be issued statements of his or her Deferral Account(s) in such form and at such times as the Administrator deems desirable (no less frequently than annually), setting forth the balance to the credit of such Participant in his or
her Deferral Account(s) as of the date of such statement. 
 6.04. No Investment Required 

No Employer need actually make any investment in any Hypothetical Investment Benchmark. If any Employer shall at any time make any investment
similar to any Hypothetical Investment Benchmark, such investment shall be solely for the Employer’s own account and no Participant shall have any right, title or interest therein. Each Participant shall be solely an unsecured creditor of the
Employer with respect to any amount distributable to him or her under the Plan at any time. 

  
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 ARTICLE VII 

BENEFITS 
 7.01. Time and Form
of Payment 
 Except as otherwise provided in Section 7.02, 7.03 or 7.08, the Employer shall pay to the Participant the balance of
each Deferral Account (net of applicable withholding in accordance with Section 7.06) at the time and in the Form of Payment as provided in this Section 7.01. 
  

	 	a.	Deferral Accounts Attributable to Deferred Amounts. 

  

	 	i.	Distributions in a Specified Payment Year. A Participant may elect in a Participation Agreement to have a Deferral Account attributable to a Deferred Amount distributed (i) in a single lump sum (determined
as of the most recent Valuation Date preceding the payment date) in cash in a specified calendar year or (ii) in cash in annual installment payments over 5 or 10 years, beginning in a specified calendar year. Distributions pursuant to this
Section 7.01(a) shall be made or commence during February of the calendar year specified by the Participant in the Participation Agreement, which, in all cases, must be no less than 36 full months after the effective date of the
Participant’s election in order to be proper and effective. Notwithstanding any election by a Participant in a Participation Agreement or provisions of the Plan to the contrary, if a Participant incurs a Separation from Service prior to
receiving full payment of his or her Deferral Account(s) pursuant to this Section 7.01(a), the Employer shall pay the remaining balance (determined as of the most recent Valuation Date preceding the payment date) to the Participant in a single
lump sum in cash within 60 days after the date of the Participant’s Separation from Service, provided that the Participant shall not have the right to designate the taxable year of payment. 

 

	 	ii.	Distributions upon Separation from Service. Alternatively, in accordance with Article IV, a Participant may elect in a Participation Agreement to have a Deferral Account attributable to a Deferred Amount
distributed in a single lump sum (determined as of the most recent Valuation Date preceding the payment date) in cash within 60 days following the date of the Participant’s Separation from Service, provided that the Participant shall not have
the right to designate the taxable year of payment. 

  

	 	b.	Distributions of Deferral Accounts Attributable to Matching Contributions and/or Discretionary Company Contributions. A Participant’s Deferral Account attributable to Matching Contributions and/or
Discretionary Contributions will be distributed in a single lump sum (determined as of the most recent Valuation Date preceding the payment date) in cash within 60 days following the date of the Participant’s Separation from Service, provided
that the Participant shall not have the right to designate the taxable year of payment. 

  
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	 	c.	Distributions upon Separation from Service by a Specified Employee. Notwithstanding anything herein to the contrary, in the event that any Specified Employee is entitled to any distribution under the Plan due to
his or her Separation from Service for any reason (but not including due to death), any amount that otherwise would have been paid under the Plan to such Participant at any time during the first six months following such Separation from Service
shall instead be accumulated (without adjustment, except as provided under Article VI, for later payment) and paid to the Participant or the Participant’s Beneficiary on the earlier of (i) the first day of the seventh month following the
date of the Participant’s Separation from Service or (ii) the date of the Participant’s death. 

  

	 	d.	Installments Payments Generally. If a Participant has elected in a Participation Agreement to have a Deferral Account attributable to a Deferred Amount distributed in cash in annual installment payments, each
annual installment payment shall equal the balance of such Deferral Account as of the most recent Valuation Date preceding the payment date, times a fraction, the numerator of which is one and the denominator of which is the number of remaining
installment payments. Each subsequent installment shall be paid on or about the succeeding anniversary of such first payment. Each such installment shall be deemed to be made on a pro rata basis from each of the different deemed investments of the
Deferral Account (if there is more than one such deemed investment). Notwithstanding anything in the Plan to the contrary, a Participant’s right to any series of installments under the Plan shall at all times be treated as a right to a series
of separate and distinct payments in accordance with applicable guidance under section 409A of the Code (which, until modified or superseded, is set forth within Treas. Reg. §1.409A-2(b)(2)(iii)). 

 

	 	e.	Default and Other Rules. To the extent that a Participant shall have failed to properly or timely designate the time or Form of Payment of any (or any portion) of the Participant’s Deferral Accounts under
the Plan in accordance with Section 7.01(a), such Participant will be deemed to have elected the time and Form of Payment described in Section 7.01(b) with respect to such Deferral Account (or portion thereof) to the extent of the failure.

 7.02. Survivor Benefit 

Notwithstanding any election by a Participant in a Participation Agreement or provisions of the Plan to the contrary, if a Participant dies
prior to receiving full payment of his or her Deferral Account(s), the Employer shall pay the remaining balance (determined as of the most recent Valuation Date preceding death) to the Participant’s Beneficiary or Beneficiaries (as the case may
be) in a single lump sum within 90 days after the date of the Participant’s death, provided that such beneficiary or beneficiaries shall not have the right to designate the taxable year of payment. 

  
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 7.03. Hardship Withdrawals 

Notwithstanding any election in a Participant’s Participation Agreement or provisions of the Plan to the contrary, a Participant may from
time to time request, in such manner as required by the Administrator, that the Administrator authorize an emergency payment to such Participant due to an Unforeseeable Emergency, in accordance with this Section 7.03. Any such distribution
shall not exceed the amount reasonably necessary to satisfy the Unforeseeable Emergency (after taking into account any additional compensation that is available upon cancellation of the Participant’s deferral elections in accordance with the
last sentence of this paragraph) plus amounts necessary to pay taxes reasonably anticipated as a result of the distribution, after taking into account the extent to which such emergency is or may be relieved through reimbursement or compensation by
insurance or otherwise or by liquidation of the participant’s assets (to the extent that liquidation of such assets would not itself cause severe financial hardship) or cessation of deferrals under the Plan. Children’s educational expenses
and the purchase or improvement of a residence are specifically excluded as events deemed to constitute an Unforeseeable Emergency for purposes of this Section. If an Unforeseeable Emergency payment is authorized by the Administrator, in its sole
and absolute discretion, the Employer shall distribute to such Participant, within a reasonable time, an amount determined by the Administrator pursuant to the above, but in no situation shall such amount be in excess of the Participant’s
Deferral Account(s) as of such date. In the event of any payment to a Participant due to Unforeseeable Emergency hereunder, any deferral election then in place with respect to the Participant shall be automatically cancelled. 

7.04. Matching Contribution 
 Each
Eligible Employee who is eligible to participate in the Styron 401(k) Plan (whether or not participating) and who elects to make deferrals of Base Salary to the Plan will be credited with a Matching Contribution utilizing the same formula authorized
under the Styron 401(k) Plan for employer matching contributions. For purposes of calculating the match under this Plan, the Employer will assume each Participant is contributing the maximum allowable amount to the Styron 401(k) Plan and receiving a
match thereon. The Matching Contribution calculated under provisions of this Plan will be reduced by this assumed match from the Styron 401(k) Plan. For the 2011 Plan Year, the amount of the Matching Contribution will be based on a formula that
takes into account a Participant’s Base Salary for all of 2011 even though the deferral election under the Plan relates only to Base Salary earned after the Effective Date. The Matching Contribution with respect to any Plan Year shall be
credited to the Deferral Account as soon as administratively feasible within the first 60 days of the following Plan Year. After credited, the Matching Contribution shall be deemed invested among the Hypothetical Investment Benchmarks (as defined in
Section 6.02) in accordance with the elections made by the Participant as may be permitted by the Administrator from time to time. The Matching Contribution for a Plan Year shall be distributed to the Participant in accordance with the time and
Form of Payment described in Section 7.01 and will vest one hundred percent (100%) on the date credited to the Participant’s Deferral Account. 

7.05. Discretionary Company Contributions 

The Company may elect to make discretionary Nonelective Employer Contributions (as defined in the Styron 401(k) Plan) to certain accounts of
Eligible Employees under the 

  
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Styron 401(k) Plan. Each Eligible Employee who receives such a Nonelective Employer Contribution under the Styron 401(k) Plan with respect to any Plan Year will be credited with a Discretionary
Company Contribution under the Plan in an amount equal to the excess, if any, of (i) the full amount of the Nonelective Employer Contribution such Eligible Employee would have received under the Styron 401(k) Plan with respect to the Plan Year
if the limitations of sections 401(a)(17) and 415 of the Code did not apply under such plan, less (ii) the actual amount of Nonelective Employer Contribution actually made to such Eligible Employee under the Styron 401(k) Plan with respect to
such Plan Year. The Discretionary Company Contribution, if any, with respect to any Plan Year for an Eligible Employee shall be credited to the employee’s Deferral Account as soon as administratively feasible within the first 60 days of the
following Plan Year. After credited, the Discretionary Company Contributions shall be deemed invested among the Hypothetical Investment Benchmarks (as defined in Section 6.02) in accordance with the elections made by the Participant as may be
permitted by the Administrator from time to time. The Discretionary Company Contribution for a Plan Year shall be distributed to the Participant in accordance with the time and Form of Payment described in Section 7.01 and will vest one hundred
percent (100%) on the date credited to the Participant’s Deferral Account. 
 7.06. Supplemental Company Contributions 

 

	 	a.	At the discretion of the Board, each Eligible Employee who was employed by an Employer during a portion of 2010 shall be credited with a Supplemental Discretionary Company Contribution under the Plan in an amount equal
to the excess of (i) the full amount of the Nonelective Employer Contribution such Eligible Employee would have received under the Styron 401(k) Plan with respect to the 2010 Plan Year if the limitations of sections 401(a)(17) and 415 of the
Code did not apply under such plan, less (ii) the actual amount of Nonelective Employer Contribution actually made to such Eligible Employee under the Styron 401(k) Plan with respect to the 2010 Plan Year. 

 

	 	b.	At the discretion of the Board, each Eligible Employer who was employed by an Employer during a portion of 2010 shall be credited with a Supplemental Matching Contribution under the Plan in an amount equal to the excess
of (i) the full amount of the Matching Contribution such Eligible Employee would have received under the Styron 401(k) Plan with respect to the 2010 Plan Year based on his or her actual deferral elections for 2010, if the limitations of
sections 401(a)(17) and 415 of the Code did not apply under such plan, less (ii) the actual amount of Matching Contribution actually made to such Eligible Employee under the Styron 401(k) Plan with respect to the 2010 Plan Year.

  

	 	c.	Any contributions approved by the Board pursuant to this Section 7.06 will be credited to a Participant’s Deferral Account attributable to Matching Contributions and/or Discretionary Company Contributions
within 60 days after the close of the 2011 Plan Year. 

 7.07. Withholding of Taxes 

Notwithstanding any other provision of this Plan, the Employer shall withhold or cause its agent to withhold from payments made hereunder any
amounts it, in its sole discretion, deems proper in accordance with any applicable law or regulation to protect the Employer against liability for the payment of such withholding taxes or other amounts

  
 - 22 - 

 
such that the Employer may discharge any such liability out of the money so withheld. To the extent permissible under applicable law, such withholding may (in the alternative) come from any wages
due to the Participant. 
 7.08. Distribution upon Inclusion in Income 

Notwithstanding the foregoing, the Administrator may on its own initiative authorize the Employer to distribute to any Participant all or any
portion of the Participant’s Deferral Account(s) in the event the Participant is required to include such amounts in income under section 409A of the Code, provided that any distribution under this Section may not exceed the amount required to
be included in income under section 409A of the Code by the Participant plus the amount of federal, state, local or other tax withholding triggered as a result of such payment. 

  
 - 23 - 

 ARTICLE VIII 

BENEFICIARY DESIGNATION 
 8.01.
Beneficiary Designation 
 Each Participant shall have the right, at any time, to designate any person, persons or entity as his or her
Beneficiary or Beneficiaries. A Beneficiary designation shall be made, and may be amended, by the Participant by filing a designation with the Administrator, in such form and in accordance with such procedures as the Administrator shall establish
from time to time (including that the Administrator may require that a Participant have a valid Beneficiary election on file to be eligible to complete a Participation Agreement with respect to any Plan Year). 

8.02. No Beneficiary Designation 
 If a
Participant or Beneficiary fails to designate a Beneficiary as provided above or if all designated Beneficiaries predecease the Participant or his or her Beneficiary, then the Participant’s Beneficiary shall be deemed to be, in the following
order: 
  

	 	a.	the spouse or Domestic Partner of such person, if any; 

  

	 	b.	the children of such person, if any; 

  

	 	c.	the beneficiary of any company paid life insurance of such person (other than executive life insurance), if any: 

  

	 	d.	the beneficiary of the executive life insurance of such person, if any; 

  

	 	e.	the beneficiary of any Company-sponsored life insurance policy for which any Company pays all or part of the premium of such person, if any; or 

 

	 	f.	the deceased person’s estate. 

  
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 ARTICLE IX 

AMENDMENT AND TERMINATION OF PLAN 

9.01. Company’s Right to Amend 
 The
Company reserves the right to amend or modify the Plan at any time and for any reason by action of the Compensation Committee (or any person or persons authorized by resolution of the Compensation Committee) without the written consent of any
Participant, Beneficiary or any other person, provided, however, that no amendment shall be effective to decrease the balance in any Deferral Account determined as of the most recent Valuation Date prior to such amendment (such balance may continue
to fluctuate, including decrease thereafter, in accordance with Article VI), nor shall any amendment otherwise have a retroactive effect. 
 9.02.
Company’s Right to Terminate 
 The Company reserves the right to terminate the Plan with respect to future Participation Agreements
at any time and for any reason by action of the Compensation Committee (or any person or persons authorized by resolution of the Compensation Committee) without the written consent of any Participant, Beneficiary or any other person. The Company
also reserves the right to terminate the Plan in its entirety at any time and for any reason, including without limitation, in connection with a Change of Control or if, in its judgment, the continuance of the Plan, the tax, accounting, or other
effects thereof, or potential payments thereunder would not be in the best interests of the Company, by action of the Compensation Committee (or any person or persons authorized by resolution of the Compensation Committee) without the written
consent of any Participant, Beneficiary or any other person. 
 Any plan termination made pursuant to this Section 9.02 shall be
performed in a manner consistent with the requirements of Code section 409A and any regulations or other applicable guidance issued thereunder. 
 9.03.
Employer’s Right to Cease Participation 
 Any Employer may cease participation in the Plan for any reason by notifying the Company
in writing at least 30 days prior to such Employer’s cessation of participation, provided that any Participation Agreement elections in place with respect to the Plan Year that includes the date of such cessation shall not be modified as a
result of such Employer’s cessation of participation (except to the extent there is some independent reason, consistent with section 409A of the Code, permitting such Participation Agreements to cease to be effective). Payments to Participants
by any such Employer will be made by such Employer in accordance with the terms of the Plan and the Employer’s cessation of participation will comply with Code section 409A. 

9.04. Effect of Amendment or Termination 

Except as provided in this section, no amendment or termination of the Plan shall be effective to decrease the balance in any Deferral Account
determined as of the most recent Valuation Date prior to the date of such amendment or termination or, except to the extent consistent with section 409A of the Code, modify the time and Form of 

  
 - 25 - 

 
Payment of any Deferral Account, except with the written consent of affected Participants. Upon termination of the Plan, distribution of balances in Deferral Account(s) shall be made to
Participants and beneficiaries in the manner and at the time described in Article VII, unless the Company determines in its sole discretion that all such amounts shall be distributed upon termination in accordance with the requirements under Code
section 409A (in which case such distributions shall proceed without the written consent of affected Participants, Beneficiaries or any other person). Upon termination of the Plan, no further deferrals of Eligible Compensation shall be permitted;
however, earnings, gains and losses shall continue to be credited to Deferral Account balances in accordance with Article VI until the Deferral Account balances are fully distributed. 

  
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 ARTICLE X 

MISCELLANEOUS 
 10.01. Unfunded
Plan 
 Except as set forth in the next sentence, all payments pursuant to the Plan shall first be made from the Employer’s general
assets and no special or separate fund shall be established or other segregation of assets made to assure payment. While all benefits payable under the Plan constitute general corporate obligations, the Company may establish a separate irrevocable
grantor trust for the benefit of all Participants, which trust shall be subject to the claims of the general creditors of the Employer in the event of such corporation’s insolvency, to be used as a reserve for the discharge of the
Employer’s obligations under this Plan to such Participants. Any payments made to a Participant under the separate trust for his or her benefit shall reduce dollar for dollar the amount payable to the Participant from the general assets of the
Employer. The amounts payable under this Plan shall be reflected on the accounting records of the Employer but shall not be construed to create or require the creation of a trust, custodial, or escrow account. No Participant (or Beneficiary of a
Participant or any other person) shall have any right, title, or interest whatever in or to any investment reserves, accounts, or funds that the Employer may purchase, establish, or accumulate to aid in providing benefits under this Plan. Nothing
contained in this Plan, and no action taken pursuant to its provisions, shall create a trust or fiduciary relationship of any kind between the Company or any other Employer and a Participant, Beneficiary or any other person. Neither a Participant
nor Beneficiary shall acquire any interest greater than that of an unsecured, general creditor. 
 10.02. Nonassignability 

Except as specifically set forth in the Plan with respect to the designation of Beneficiaries or as otherwise required under applicable law,
neither a Participant nor any other person shall have any right to commute, sell, assign, transfer, pledge, anticipate, mortgage or otherwise encumber, transfer, hypothecate or convey in advance of actual receipt the amounts, if any, payable
hereunder, or any part thereof, which are, and all rights to which are, expressly declared to be unassignable and non-transferable. No part of the amounts payable shall, prior to actual payment, be subject to seizure or sequestration for the payment
of any debts, judgments, alimony or separate maintenance owed by a Participant or any other person, nor be transferable by operation of law in the event of a Participant’s or any other person’s bankruptcy or insolvency. 

10.03. Corporate Action 
 Any action
required of or permitted by the Company under this Plan shall be by resolution of the Compensation Committee, or any person or persons authorized by resolution of the Compensation Committee. 

10.04. Validity, Severability and Integration 

The invalidity or unenforceability of any provision of this Plan shall not affect the validity or enforceability of any other provision of this
Plan, which shall remain in full force and effect, and any prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction. 

  
 - 27 - 

 This Plan, together with any Participation Agreement under this Plan filed after the Effective
Date, contains the entire agreement and understanding of the parties related to the subject matter hereof and the rights of any Participant, Beneficiary or any other person claiming any right to payment or benefits described herein and supersedes
any prior written or oral agreements or understandings between the parties. This Plan may be amended or terminated only in accordance with the provisions of Article IX of this Plan. 

10.05. Employment Status 
 This Plan does
not constitute a contract of employment or impose on the Participant or any Employer any obligation for the Participant to remain an employee of such Employer or change the status of the Participant’s employment or the policies of such Employer
and its affiliates regarding termination of employment. 
 10.06. Facility of Payment 

If a Participant or Beneficiary is declared an incompetent or is a minor and a conservator, guardian, or other person legally charged with his
or her care has been appointed, any benefits to which such Participant or Beneficiary is entitled shall be payable to such conservator, guardian, or other person legally charged with his or her care. The decision of the Administrator in such matters
shall be final, binding, and conclusive upon the Employer and upon each Participant, Beneficiary, and every other person or party interested or concerned. The Employer and the Administrator shall not be under any duty to see to the proper
application of such payments. 
 10.07. Effect on Other Benefit Plans 

Nothing in this Plan shall prevent the Employer from modifying, amending or terminating the compensation or the incentive plans and programs
pursuant to which Performance Awards are earned and which are deferred under this Plan. 
 Amounts credited or paid under this Plan shall not
be considered to be compensation for the purposes of a qualified pension plan or any other plan maintained by the Company or any other Employer. The treatment of such amounts under other employee benefits plans shall be determined pursuant to the
provisions of such plans. 
 10.08. Successors 

The rights and obligations of the Company and any Employer hereunder shall inure to the benefit of, and shall be binding upon, the successors
and assigns of the Company or Employer, as applicable. 
 10.09. Waiver of Breach 

The waiver by the Company or any Employer of any breach of any provision of the Plan by the Participant shall not operate or be construed as a
waiver of any subsequent breach by the Participant. 

  
 - 28 - 

 10.10. Notice 

Any notice or filing required or permitted to be given to the Company under the Plan shall be sufficient if in writing and hand-delivered, sent
by first class mail to the Company’s principal office directed to the attention of the Administrator, or, as permitted by the Administrator, delivered electronically to the Administrator via email or other electronic means. Such notice shall be
deemed given as of the date of delivery, or, if delivery is made by mail, as of the date shown on the postmark. Any notice required to be given by an Employer or the Administrator hereunder may be given in writing, delivered in person, sent by first
class mail, or delivered via electronic media. Any notice given by first class mail shall be deemed to have been given as of the date mailed to the last known address of the person to whom such notice was given. Any notice given via electronic media
shall be deemed to have been given upon sending to the last known electronic address of the person to whom such notice is to be given. 
 10.11. Gender
and Number 
 Except when the context indicates to the contrary, when used herein, masculine terms shall be deemed to include the
feminine, and singular the plural. 
 10.12. Headings 

The headings or articles are included solely for convenience of reference, and if there is any conflict between such headings and the text of
this Plan, the text shall control. 
 10.13. Governing Law 

The validity, interpretation, construction and performance of this Plan shall in all respects be governed by the laws of the State of Delaware,
without reference to principles of conflict of law, except to the extent preempted by federal law. 
 10.14. Successor Titles or Positions 

The title of an officer or employee when used in this Plan document shall mean the respective officer or employee of the Company, except where
otherwise indicated. The title of any person or entity who is assigned responsibilities under the Plan shall include any successor title to such position as such title may be changed from time to time. 

10.15. Section 409A Compliance 
 The
Company intends that all provisions of the Plan comply with the requirements of Code Section 409A or an exemption therefrom. No provision of the Plan shall be operative to the extent that it will result in the imposition of the additional tax
described in Code Section 409A(a)(1)(B)(i)(II) and the Plan will be interpreted as necessary to comply with Section 409A or an exemption therefrom and fulfill the purpose of the voided provision. Nothing in the Plan shall be interpreted to
permit accelerated payment of nonqualified deferred compensation, as defined in Section 409A, or any other payment in violation of the requirements of Section 409A. No provision of this Plan shall be interpreted or construed to transfer
any liability for failure to comply with the requirements of Section 409A from a Participant or any other individual to the Company or any of its respective affiliates, employees or agents. All taxes associated with payments made to a
Participant pursuant to the Plan, including any liability imposed under Section 409A, shall be borne by the Employee. 

  
 - 29 - 

 IN WITNESS WHEREOF, Styron LLC has caused this amended and restated Plan document to be
executed in its name and on its behalf by its officers duly authorized on this      day of             , 2011. 

 

			
	STYRON LLC
		
	By:	 	  

	Its:	 	  

  
 - 30 -

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