SUPPLEMENT TO PROXY STATEMENT
FOR THE ANNUAL MEETING OF STOCKHOLDERS
to be held on May 3, 2022
This
supplement, dated April 15, 2022 (this Supplement), amends and supplements the Definitive Proxy Statement of GCP Applied Technologies Inc. (the Company) dated March 23, 2022 (the Proxy Statement), and is
being made available to the Companys stockholders on or about April 15, 2022 in connection with the solicitation of proxies on behalf of the board of directors of the Company (the Board) of the Companys 2022 Annual
Meeting of Stockholders to be held on Tuesday, May 3, 2022 (the Meeting) or any postponement or adjournment thereof.
We are asking for
your support at the Meeting by voting in accordance with the recommendations of the Board on all proposals. In particular, we are requesting your support on Proposal One: Election of Directors (the Director Proposal) and Proposal Three:
Advisory Vote to Approve the Compensation of GCPs Named Executive Officers (the Say-on-Pay Proposal). In deciding how to vote on these proposals, we encourage you to read the relevant portions of our Proxy Statement and consider
the supplemental information below.
THE PROXY STATEMENT CONTAINS IMPORTANT INFORMATION AND THIS SUPPLEMENT SHOULD BE READ IN CONJUNCTION WITH THE PROXY
STATEMENT.
The Board of Directors recommends you vote FOR the Director Proposal
Institutional Shareholder Services Inc., a proxy advisory firm, published a report on April 9, 2022 (the ISS Report) recommending that the
Companys stockholders vote against electing Robert H. Yanker as a director due to the fact that there is lack of diversity on the Board and he serves as chair of the Nominating, Governance and Environmental and Social Responsibility Committee
(the Committee). During 2021, the Committee conducted a search for, and identified, potential board nominees who were diverse in race and ethnicity. The Committee was prepared to extend an offer to such identified nominee; however, the
Committee suspended the process upon the execution of the Merger Agreement. In the event the transactions contemplated by the Merger Agreement are not consummated, the Committee will commence a new search for potential board nominees who are
racially and ethnically diverse.
Glass, Lewis & Co. (Glass Lewis), a proxy advisory firm, published a report on April 6, 2022
recommending that the Companys stockholders vote against electing Mr. Yanker as a director due to the fact that he serves as chair of the Committee. Glass Lewis made such recommendation because the Companys Amended and Restated
Bylaws contain an exclusive forum provision. In May 2021, the Board amended the Companys Amended and Restated By-laws to adopt a forum selection clause, which designates the federal district courts of
the United States of America as the exclusive jurisdiction for any litigation arising under the Securities Act of 1933, as amended (the By-law Amendment). The Board approved the By-law Amendment in order to reduce any potential expenses that the Company may incur in connection with any such actions or proceedings if the Company was required to defend any such potential actions or
proceedings in multiple jurisdictions and in parallel proceedings in federal and state courts simultaneously.