UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE TO

(Rule 14d-100)

TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1)

OF THE SECURITIES EXCHANGE ACT OF 1934

CHORDIANT SOFTWARE, INC.

(Name of subject company (Issuer))

MAPLE LEAF ACQUISITION CORP.

a wholly owned subsidiary of

PEGASYSTEMS INC.

(Name of Filing Persons (Offerors))

Common Stock, par value $0.001 per share	170404305
(Title of classes of securities)	(CUSIP number of common stock)

Shawn Hoyt

General Counsel and Secretary

Pegasystems, Inc.

101 Main Street

Cambridge, MA 02142

(617) 374-9600

(Name, address, and telephone number of person authorized to receive

notices and communications on behalf of Filing Persons)

Copies to:

Jeffrey D. Saper

Lawrence M. Chu

Wilson Sonsini Goodrich & Rosati

Professional Corporation

650 Page Mill Road

Palo Alto, CA 94304

(650) 493-9300

CALCULATION OF REGISTRATION FEE

Transaction Valuation	Amount of Filing Fee*
Not applicable.	Not Applicable.

* A filing fee is not required in connection with this filing as it relates solely to preliminary communications made before the commencement of a tender offer.

¨ Check the box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the form or schedule and the date of its filing.

Amount Previously Paid:	None	Filing Party:	N/A
Form of Registration No.:	N/A	Date Filed:	N/A

x Check the box if the filing relates solely to preliminary communications made before the commencement of the tender offer.

Check the appropriate boxes below to designate any transactions to which the statement relates:

x third party tender offer subject to Rule 14d-1

¨ issuer tender offer subject to Rule 13e-4

¨ going private transaction subject to Rule 13e-3

¨ amendment to Schedule 13D under Rule 13d-2

Check the following box if the filing is a final amendment reporting the results of the tender offer:  ¨

Item 12. Exhibits.

Exhibit No.	Description
99.1	Joint Press Release of Pegasystems Inc. and Chordiant Software, Inc., dated March 15, 2010