Attendance at the Extraordinary General Meeting

Only those holders of registered shares entered in the share register as at June 6, 2018 are entitled to vote at the Extraordinary General Meeting. Individual admission cards will be sent to them two weeks prior to the Extraordinary General Meeting. No further registrations of voting rights will be carried out in the period from June 7 to June 11, 2018. Registered shareholders who were registered with voting rights as at June 7, 2018, but who sold their shares prior to the Extraordinary General Meeting, lose their shareholder rights in respect of the shares sold. At the entrance, they will receive a new admission card corresponding to their current holding of shares.

Holders of bearer shares wishing to attend, or have themselves represented at, the Extraordinary General Meeting may obtain their admission card from their custodian bank between May 19, 2018 and June 6, 2018 at the latest. Holders of bearer shares who have not deposited their shares with a custodian bank will receive their admission card directly at the Extraordinary General Meeting upon presentation of their shares or share certificates.

The custodian banks will obtain the admission cards through Computershare Schweiz AG, Sika AG, P.O. Box, CH-4601 Olten, phone +41 62 205 77 50, fax +41 62 205 77 91, e-mail: generalversammlung@ computershare.ch, by submitting a blocking confirmation and will then send the admission cards to the shareholders. The shares in question will remain blocked until after the end of the Extraordinary General Meeting.

Representation by proxy at the Extraordinary General Meeting

Shareholders not attending the Extraordinary General Meeting in person may appoint a proxy. Shareholders wishing to appoint the independent proxy Mr. Jost Windlin, attorney-at-law and notary, Zwicky, Windlin & Partner, are requested to submit their admission card, including power of attorney and written voting instructions, to Computershare Schweiz AG, Sika AG, P.O. Box, CH-4601 Olten, at the latest by 12.00 p.m. (noon) on June 8, 2018.

Remote electronic voting by issuing authorizations and instructions to the independent proxy

Shareholders may cast their votes remotely by issuing electronic authorizations and instructions to theindependent proxy at investor.sherpany.com. The necessary login data is enclosed with the meetingmaterials supplied to shareholders. Shareholders thus have the option of voting in person, through a proxy,or remotely by issuing electronic authorizations and instructions to the independent proxy. Shareholdersmay use the online proxy voting, or change any instructions they may have issued electronically, up to butno later than 11.59 p.m. on Saturday, June 9, 2018.