Attendance at the Annual General Meeting

Only those holders of registered shares entered in the shareregister as at April 6, 2017 are entitled to vote at the Annual General Meeting. Individual admission cardswill be sent to them two weeks prior to the Annual General Meeting. No further registrations of votingrights will be carried out in the period from April 7 to April 11, 2017. Registered shareholders who were registeredwith voting rights as at April 7, 2017, but who sold their shares prior to the Annual General Meeting, lose their shareholder rights in respect of the shares sold. At the entrance, they will receive a new admissioncard corresponding to their current holding of shares.

Holders of bearer shares wishing to attend, or have themselves represented at, the Annual General Meetingmay obtain their admission card from their custodian bank between March 16, 2017 and April 6, 2017 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 Annual General Meeting upon presentation of their shares or share certificates.

The custodian banks will obtain the admission cards through Computershare Schweiz AG (formerly SIX SAG AG), Sika AG, P.O. Box, CH-4601 Olten, phone +41 62 205 77 50, fax +41 62 205 77 91, e-mail: rafael.franzi@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 Annual General Meeting.

Representation by proxy at the Annual General Meeting

Shareholders not attending the Annual 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 (formerly SIX SAG AG), Sika AG, P.O. Box, CH-4601 Olten, at the latest by 12.00 p.m. (noon) on April 10, 2017

Remote electronic voting

Remote electronic voting by issuing authorizations and instructions to the independent proxy: Share-holders may cast their votes remotely by issuing electronic authorizations and instructions to the inde-pendent proxy at investor.sherpany.com. The necessary login data is enclosed with the meeting materi-als 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. Shareholders may use the online proxy voting, or change any instructions they may have issued electronically, up to but nolater than 11.59 p.m. on Sunday, April 9, 2017.