I haven't received a proxy yet either. Last years' meet was May 27th. This year may be delayed because Glencore is apparently in talks with the Co. about representation on the Board. Therefore the Co. has extended the deadline for naming Board candidates until April 9. No proxy can be mailed before then.
"The Reporting Persons are engaged in discussions with the Company regarding the composition of and the Reporting Persons' representation on the Company's board of directors."