JOINT FILING AGREEMENT
\
Exhibit 99
Each of the undersigneds hereby agrees that the statement on Schedule 13G/A (Amendment No. 4)
with respect to the ordinary shares, without nominal value, of SAP AG (f/k/a SAP Aktiengesellschaft
Systeme, Anwendungen, Produkte in der Datenverarbeitung) is, and any amendment thereto signed by
each of the undersigned shall be, filed on behalf of each of the undersigneds pursuant to and in
accordance with the provisions of Rule 13d-1(k) promulgated under the Securities Exchange Act of
1934, as amended. Each of the undersigneds hereby further agrees that this Joint Filing Agreement
be included as an exhibit to such statement and any such amendment. This Joint Filing Agreement
may be executed in any number of counterparts, all of which taken together shall constitute one and
the same instrument.
Dated: February 16, 2009
| XXXXXXX XXXX STIFTUNG, GMBH |
||||
| By: | /s/ Xxxxxxx Xxxx | |||
| Name: | Xxxxxxx Xxxx | |||
| Title: | Managing Director | |||
| /s/ Xxxxxxx Xxxx | ||||
| XXXXXXX XXXX | ||||
-9-
