================================================================================

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934


        Date of Report (Date of earliest event reported) November 1, 2006
                                                         -----------------


                             FAIR ISAAC CORPORATION
                             ----------------------
             (Exact name of registrant as specified in its charter)

          Delaware                       0-16439                94-1499887
          --------                       -------                ----------
(State or other jurisdiction           (Commission            (IRS Employer
      of incorporation)                File Number)         Identification No.)

     901 Marquette Avenue, Suite 3200
          Minneapolis, Minnesota                          55402-3232
          ----------------------                          ----------
 (Address of principal executive offices)                 (Zip Code)


         Registrant's telephone number, including area code 612-758-5200
                                                            ------------

    Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

[_]  Written  communications  pursuant to Rule 425 under the  Securities Act (17
     CFR 230.425)

[_]  Soliciting  material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
     240.14a-12)

[_]  Pre-commencement   communications  pursuant  to  Rule  14d-2(b)  under  the
     Exchange Act (17 CFR 240.14d-2(b))

[_]  Pre-commencement   communications  pursuant  to  Rule  13e-4(c)  under  the
     Exchange Act (17 CFR 240.13e-4(c))

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                                TABLE OF CONTENTS

   Item 2.02.    Results of Operations and Financial Condition.
   Item 5.02.    Departure of Directors or Principal Officers;
                 Appointment of Principal Officers.
   Item 9.01.    Financial Statements and Exhibits.

   Signature
   Exhibit Index
   Exhibit 99.1

Item 2.02. Results of Operations and Financial Condition. On November 1, 2006, Fair Isaac Corporation (the "Company") reported its financial results for the quarter and fiscal year ended September 30, 2006. See the Company's press release dated November 1, 2006, which is furnished as Exhibit 99.1 hereto and incorporated by reference in this Item 2.02. Item 5.02. Departure of Directors or Principal Officers; Appointment of Principal Officers. (b) Thomas G. Grudnowski, who served as the Company's chief executive officer, president, and a member of the Board, resigned from all of the positions he held with the Company and its affiliated entities on November 1, 2006, effectively immediately. Mr. Grudnowski has agreed to remain as an employee of the Company during a transition period ending on January 31, 2007. (c) Charles M. Osborne, 53, has been appointed as the Company's chief executive officer, on an interim basis and effective November 1, 2006. Mr. Osborne has served the Company as a vice president and as chief financial officer since May 2004 and will continue to hold these positions while serving as interim chief executive officer. Additional information regarding Mr. Osborne's business experience is set forth at the end of Part I to the Company's Annual Report on Form 10-K for the fiscal year ended September 30, 2005 and incorporated by reference in this Item 5.02. A copy of the press release announcing Mr. Grudnowski's resignation and Mr. Osborne's appointment is furnished as Exhibit 99.1 hereto. Item 9.01. Financial Statements and Exhibits. (d) Exhibits. Exhibit Description 99.1 Press Release dated November 1, 2006

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. FAIR ISAAC CORPORATION By /s/ Charles M. Osborne ------------------------------- Charles M. Osborne Chief Executive Officer Date: November 1, 2006

EXHIBIT INDEX Exhibit No. Description Manner of Filing - ----------- ----------- ---------------- 99.1 Press Release dated November 1, 2006 Filed Electronically

                                                                    Exhibit 99.1


                     Fair Isaac Announces Fourth Quarter and
     Fiscal 2006 Results, New Stock Repurchase Authorization, and Departure
                           of Chief Executive Officer



    MINNEAPOLIS--(BUSINESS WIRE)--Nov. 1, 2006--Fair Isaac Corporation
(NYSE:FIC), the leading provider of analytics and decision technology,
today announced the financial results for its fourth quarter and
fiscal year ended September 30, 2006. In addition, the board of
directors authorized a new $500 million share repurchase program.

    The board of directors of Fair Isaac Corporation also announced
today that Thomas G. Grudnowski has stepped down as chief executive
officer and board member, effective immediately. Charles M. Osborne,
Fair Isaac's chief financial officer, has been named chief executive
officer on an interim basis.

    "Tom Grudnowski came to Fair Isaac to revitalize and reinvigorate
the company. He brought a strategic vision and put in place a plan
that has given this company the capabilities to compete and win. We
thank Tom for his significant leadership over the past seven years as
we look forward to continued execution of the company's strategy,"
said A. George Battle, chairman, on behalf of the board.

    The board will begin a search for a new chief executive officer
immediately. The interim chief executive officer, Mr. Osborne, has
been the chief financial officer of the company since May 2004 and has
over 32 years of business leadership experience. He will also retain
his chief financial officer responsibilities. The company has made no
additional structural changes or executive leadership changes at this
time.

    Fourth Quarter Fiscal 2006 Results

    The company reported fourth quarter revenues of $207.3 million in
fiscal 2006 versus $203.3 million reported in the prior year period.
Net income for the fourth quarter of fiscal 2006 totaled $22.1
million, or $0.35 per diluted share, versus $35.7 million, or $0.53
per diluted share, reported in the prior year period.

    Fourth quarter fiscal 2006 results included share-based
compensation expense of $7.4 million after-tax, or $0.12 per diluted
share, due to the adoption of SFAS 123(R), and costs associated with
the previously announced lease exit of $8.3 million after-tax, or
$0.13 per diluted share.

    Fiscal 2006 Results

    The company reported revenues of $825.4 million versus $798.7
million in the prior year period. Net income for fiscal 2006 totaled
$103.5 million, or $1.59 per diluted share, versus $134.5 million, or
$1.86 per diluted share, reported in the prior year.

    Fiscal 2006 results included share-based compensation expense of
$26.6 million after-tax, or $0.41 per diluted share, due to the
adoption of SFAS 123(R), and restructuring and acquisition-related
costs of $12.7 million after-tax, or $0.19 per diluted share.

    Fiscal 2005 results included a decrease in diluted earnings per
share of $0.09 related to the adoption of EITF Issue No. 04-8, and an
increase in diluted earnings per share of $0.14 related to revisions
made to tax liabilities.

    Fourth Quarter Fiscal 2006 Revenues Highlights

    Revenues for fourth quarter fiscal 2006 across each of the
company's four operating segments were as follows:

    --  Strategy Machine(R) Solutions revenues increased to $111.6
        million in the fourth quarter compared to $109.6 million in
        the prior year quarter, or by 1.8%, primarily due to an
        increase in revenues from fraud, originations, and collections
        and recovery solutions, offset by a decline associated with
        insurance solutions and consumer scoring products.

    --  Scoring Solutions revenues were $45.5 million in the fourth
        quarter compared to $47.8 million in the prior year quarter,
        or a decrease of 4.8%, primarily due to a decrease in revenues
        derived from risk scoring services at the credit reporting
        agencies.

    --  Professional Services revenues increased to $37.0 million in
        the fourth quarter from $33.4 million in the prior year
        quarter, or by 10.9%, primarily due to an increase in revenues
        from strategic consulting services and implementation services
        for EDM products.

    --  Analytic Software Tools revenues increased to $13.2 million in
        the fourth quarter compared to $12.6 million in the prior year
        quarter, or by 5.1%, due to an increase in revenues generated
        from sales of the Blaze Advisor(TM) product.

    Fiscal 2006 Revenues Highlights

    Revenues for fiscal 2006 across each of the company's four
operating segments were as follows:

    --  Strategy Machine(R) Solutions revenues increased to $457.2
        million from $453.7 million in the prior year period, or by
        0.8%, primarily due to growth in fraud solutions, consumer
        scoring products and collections and recovery solutions,
        offset by a decline associated with marketing services and
        insurance solutions.

    --  Scoring Solutions revenues increased to $177.2 million from
        $167.3 million in the prior year period, or by 5.9%, primarily
        due to an increase in revenues from risk scoring services at
        the credit reporting agencies, and PreScore(R) Service.

    --  Professional Services revenues increased to $145.3 million
        from $129.6 million in the prior year period, or by 12.1%,
        primarily due to an increase in revenues from strategic
        consulting services and implementation services for EDM
        products, offset by a decline in consulting services related
        to precision marketing.

    --  Analytic Software Tools revenues were $45.7 million compared
        to $48.0 million in the prior year period, or a decrease of
        4.8%, due to a decline in revenues generated from sales of the
        Blaze Advisor(TM) product.

    Bookings Highlights

    The bookings for the fourth quarter were $112.6 million versus
$109.7 million in the same period last year. The company defines a
"new booking" as estimated future contractual revenues, including
agreements with perpetual, multi-year and annual terms. Management
regards the volume of new bookings achieved as one indicator of future
revenues, but they are not comparable to, nor should they be
substituted for, an analysis of the company's revenues.

    Balance Sheet and Cash Flow Highlights

    Cash and cash equivalents, and marketable security investments
were $267.8 million at September 30, 2006, as compared to $288.1
million at September 30, 2005. Significant changes in cash and cash
equivalents from September 30, 2005 include cash provided by
operations of $199.0 million for fiscal 2006 and $64.2 million
received from the exercise of stock options and stock issued under an
employee stock purchase plan. Cash used during fiscal 2006 includes
$31.4 million related to purchases of property and equipment and
$256.5 million to repurchase company stock.

    Outlook

    The company expects revenues for first quarter fiscal 2007 of
approximately $210.0 million and earnings per diluted share, to be
approximately $0.48. The company expects revenues for fiscal 2007 of
approximately $870.0 million and earnings per diluted share, to be
approximately $2.10. The earnings per diluted share, guidance include
compensation expense related to SFAS 123(R).

    New Stock Repurchase Program

    Fair Isaac also announced today that its Board of Directors has
approved a common stock repurchase program to acquire up to $500
million of the company's outstanding common stock. This new program
replaces the Company's previous repurchase program announced on August
29, 2006, which had authorized the company to acquire up to $250
million of outstanding stock. Under the previous program, Fair Isaac
purchased approximately 2.4 million shares of its common stock, at an
aggregate cost of approximately $85.3 million. The stock repurchase
program, which is open-ended, allows the company to repurchase its
shares from time to time in the open market and in negotiated
transactions.

    Company to Host Conference Call

    The company will host a conference call today at 5:00 p.m. Eastern
Time (4:00 p.m. Central Time/2:00 p.m. Pacific Time) to discuss its
fourth quarter and fiscal 2006 results, and outlook for fiscal 2007.
The call can be accessed live on the Investor Relations section of the
company's Web site at www.fairisaac.com, and a replay will be
available approximately two hours after the completion of the call
through November 29, 2006.

    About Fair Isaac Corporation

    Fair Isaac Corporation (NYSE:FIC) makes decisions smarter. The
company's solutions and technologies for Enterprise Decision
Management give businesses the power to automate more processes, and
apply more intelligence to every customer interaction. Through
increasing the precision, consistency and agility of their decisions,
Fair Isaac clients worldwide increase sales, build customer value, cut
fraud losses, manage credit risk, reduce operational costs, meet
changing compliance demands and enter new markets more profitably.
Founded in 1956, Fair Isaac powers hundreds of billions of decisions
each year in financial services, insurance, telecommunications,
retail, consumer branded goods, healthcare and the public sector. Fair
Isaac also helps millions of individuals manage their credit health
through the www.myfico.com website. Visit Fair Isaac online at
www.fairisaac.com.

    Statement Concerning Forward-Looking Information

    Except for historical information contained herein, the statements
contained in this news release that relate to Fair Isaac or its
business are forward-looking statements within the meaning of the
"safe harbor" provisions of the Private Securities Litigation Reform
Act of 1995. These forward-looking statements are subject to risks and
uncertainties that may cause actual results to differ materially,
including the company's ability to recruit and retain key technical
and managerial personnel, the maintenance of its existing
relationships and ability to create new relationships with customers
and key alliance partners, its ability to continue to develop new and
enhanced products and services, competition, regulatory changes
applicable to the use of consumer credit and other data, the
possibility that the anticipated benefits of acquisitions, including
expected synergies, will not be realized and other risks described
from time to time in Fair Isaac's SEC reports, including its Annual
Report on Form 10-K for the year ended September 30, 2005 and
quarterly report on Form 10-Q for the period ended June 30, 2006. If
any of these risks or uncertainties materialize, Fair Isaac's results
could differ materially from its expectations. Fair Isaac disclaims
any intent or obligation to update these forward-looking statements.

    Fair Isaac, FICO, myFICO, Falcon, Blaze Advisor, TRIAD, Strategy
Machine and PreScore are trademarks or registered trademarks of Fair
Isaac Corporation in the United States and in other countries.



                        FAIR ISAAC CORPORATION
             CONDENSED CONSOLIDATED STATEMENTS OF INCOME
     For the Quarters and Years Ended September 30, 2006 and 2005
                (In thousands, except per share data)
                             (Unaudited)


                            Quarter Ended          Year Ended
                            September 30,         September 30,
                        --------------------- ---------------------
                           2006       2005       2006       2005
                        ---------- ---------- ---------- ----------

Revenues                 $207,289   $203,297   $825,365   $798,671
                        ---------- ---------- ---------- ----------

Operating expenses:
  Cost of revenues         70,291     67,308    281,977    275,065
  Research and
   development             19,173     20,998     84,967     81,295
  Selling, general and
   administrative          66,967     55,621    260,845    223,400
  Amortization of
   intangible assets        6,366      6,260     25,191     25,900
  Restructuring and
   acquisition-related     12,862          -     19,662          -
                        ---------- ---------- ---------- ----------
     Total operating
      expenses            175,659    150,187    672,642    605,660
                        ---------- ---------- ---------- ----------
Operating income           31,630     53,110    152,723    193,011
Other income, net           1,416      1,076      6,469      1,077
                        ---------- ---------- ---------- ----------
Income before income
 taxes                     33,046     54,186    159,192    194,088
Provision for income
 taxes                     10,993     18,438     55,706     59,540
                        ---------- ---------- ---------- ----------
Net income                $22,053    $35,748   $103,486   $134,548
                        ========== ========== ========== ==========


Earnings per share:
  Basic                     $0.36      $0.55      $1.63      $2.02
                        ========== ========== ========== ==========
  Diluted                   $0.35      $0.53      $1.59      $1.86 (a)
                        ========== ========== ========== ==========


Shares used in
 computing earnings per
 share:
  Basic                    61,423     64,471     63,579     66,556
                        ========== ========== ========== ==========
  Diluted                  62,506     67,216     65,125     73,584 (a)
                        ========== ========== ========== ==========

Share-based
 compensation expense
 included in the above
 operating expense
 captions are as
 follows (b):
  Cost of revenues         $2,705       $513    $10,970       $703
  Research and
   development              1,374         79      6,435        166
  Selling, general and
   administrative           7,982      1,243     24,680      2,058
                        ---------- ---------- ---------- ----------
Total share-based
 compensation expense     $12,061     $1,835    $42,085     $2,927
                        ========== ========== ========== ==========

(a) The computation of diluted earnings per share for the year ended
 September 30, 2005 includes 4.5 million shares of common stock
 issuable upon conversion of our senior convertible notes, along with
 a corresponding adjustment to net income to add back related interest
 expense, net of tax, of approximately $2.5 million.  On March 31,
 2005, the company successfully completed an exchange offer for
 approximately 99.9% of the principal amount of its senior convertible
 notes for new senior convertible notes.  The dilutive effect of the
 new senior convertible notes has been calculated using the treasury
 stock method since the effective date of the exchange.

(b) Effective October 1, 2005, the company adopted SFAS 123(R),
 "Share-Based Payment", which required the company to record
 compensation expense for all share-based awards.  Results from prior
 periods have not been restated.




                        FAIR ISAAC CORPORATION
                CONDENSED CONSOLIDATED BALANCE SHEETS
                     September 30, 2006 and 2005
                            (In thousands)
                             (Unaudited)


                                           September 30, September 30,
                                               2006          2005
                                           ------------- -------------

ASSETS:
Current assets:
  Cash and cash equivalents                     $75,154       $82,880
  Marketable securities                         152,141       146,088
  Receivables, net                              165,806       156,375
  Prepaid expenses and other current
   assets                                        20,209        27,337
                                           ------------- -------------
     Total current assets                       413,310       412,680

Marketable securities and investments            40,479        59,087
Property and equipment, net                      56,611        48,436
Goodwill and intangible assets, net             786,062       803,306
Other noncurrent assets                          24,743        27,552
                                           ------------- -------------
                                             $1,321,205    $1,351,061
                                           ============= =============

LIABILITIES AND STOCKHOLDERS' EQUITY:
Current liabilities:
  Accounts payable and other accrued
   liabilities                                  $53,809       $50,947
  Senior convertible notes                      400,000             -
  Accrued compensation and employee
   benefits                                      34,936        31,373
  Deferred revenue                               48,284        55,837
                                           ------------- -------------
     Total current liabilities                  537,029       138,157

Senior convertible notes                              -       400,000
Other noncurrent liabilities                     14,148         7,810
                                           ------------- -------------
     Total liabilities                          551,177       545,967

Stockholders' equity                            770,028       805,094
                                           ------------- -------------
                                             $1,321,205    $1,351,061
                                           ============= =============




                        FAIR ISAAC CORPORATION
                         REVENUES BY SEGMENT
     For the Quarters and Years Ended September 30, 2006 and 2005
                            (In thousands)
                             (Unaudited)


                                  Quarter Ended        Year Ended
                                  September 30,       September 30,
                               ------------------- -------------------
                                 2006      2005      2006      2005
                               --------- --------- --------- ---------

Strategy machine solutions     $111,553  $109,578  $457,211  $453,734
Scoring solutions                45,483    47,758   177,152   167,270
Professional services            37,035    33,383   145,271   129,636
Analytic software tools          13,218    12,578    45,731    48,031
                               --------- --------- --------- ---------
   Total revenues              $207,289  $203,297  $825,365  $798,671
                               ========= ========= ========= =========




                        FAIR ISAAC CORPORATION
           CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
           For the Years Ended September 30, 2006 and 2005
                            (In thousands)
                             (Unaudited)


                                                      Year Ended
                                                     September 30,
                                                 ---------------------
                                                    2006       2005
                                                 ---------- ----------
Cash flows from operating activities:
Net income                                        $103,486   $134,548
Adjustments to reconcile net income to net cash
 provided by operating activities:
  Depreciation and amortization                     48,805     51,517
  Changes in operating assets and liabilities,
   net of acquisitions                              (2,096)    (5,082)
  Other, net                                        48,847     33,099
                                                 ---------- ----------
     Net cash provided by operating activities     199,042    214,082
                                                 ---------- ----------

Cash flows from investing activities:
Purchases of property and equipment                (31,409)   (16,414)
Cash paid for acquisitions, net of cash acquired         -    (41,312)
Net activity from marketable securities             13,882     32,003
Other, net                                             500     22,822
                                                 ---------- ----------
     Net cash used in investing activities         (17,027)    (2,901)
                                                 ---------- ----------

Cash flows from financing activities:
Proceeds from issuances of common stock             64,200     71,867
Repurchases of common stock                       (256,487)  (328,537)
Other, net                                           1,994     (5,316)
                                                 ---------- ----------
     Net cash used in financing activities        (190,293)  (261,986)
                                                 ---------- ----------

Effect of exchange rate changes on cash                552       (385)
                                                 ---------- ----------

Decrease in cash and cash equivalents               (7,726)   (51,190)
Cash and cash equivalents, beginning of period      82,880    134,070
                                                 ---------- ----------
Cash and cash equivalents, end of period           $75,154    $82,880
                                                 ========== ==========




Fair Isaac Corporation
Baseline Revenue Analysis
(In thousands)


- ----------------------------------------------------------------------
            BKG'05      Q1A       Q2A       Q3A       Q4A      FY05
- ----------------------------------------------------------------------
Total
 Baseline
 Prior to
 '05                 $176,161  $164,445  $158,912  $150,950  $650,468
- ----------------------------------------------------------------------
Q1-2005A   $115,363    19,385    12,916     9,120     7,622    49,043
Q2-2005A    136,560              18,660    12,402     8,312    39,374
Q3-2005A    143,318                        23,373    16,259    39,632
Q4-2005A    109,728                                  20,154    20,154
- ----------------------------------------------------------------------
Total FY05  504,969    19,385    31,576    44,895    52,347   148,203
- ----------------------------------------------------------------------
Total
 Baseline
 Prior to
 '06        504,969   195,546   196,021   203,807   203,297   798,671
- ----------------------------------------------------------------------
Q1-2006A
Q2-2006A
Q3-2006A
Q4-2006A
- ----------------------------------------------------------------------
Total FY06
- ----------------------------------------------------------------------

- ----------------------------------------------------------------------
Grand
 Total     $504,969  $195,546  $196,021  $203,807  $203,297  $798,671
======================================================================



- ----------------------------------------------------------------------
            BKG'06      Q1A       Q2A       Q3A       Q4A      FY06
- ----------------------------------------------------------------------
Total
 Baseline
 Prior to
 '05                 $149,484  $143,730  $141,099  $140,237  $574,550
- ----------------------------------------------------------------------
Q1-2005A                6,205     4,261     3,765     2,560    16,791
Q2-2005A                6,194     5,975     5,238     4,525    21,932
Q3-2005A                7,404     7,198     5,478     4,524    24,604
Q4-2005A               11,482    10,521     8,339     6,428    36,770
- ----------------------------------------------------------------------
Total FY05             31,285    27,955    22,820    18,037   100,097
- ----------------------------------------------------------------------
Total
 Baseline
 Prior to
 '06                  180,769   171,685   163,919   158,274   674,647
- ----------------------------------------------------------------------
Q1-2006A   $127,778    22,021    15,296     8,988     6,548    52,853
Q2-2006A    106,024              21,176    12,674     8,716    42,566
Q3-2006A     94,480                        21,547    13,009    34,556
Q4-2006A    112,572                                  20,743    20,743
- ----------------------------------------------------------------------
Total FY06  440,854    22,021    36,472    43,209    49,016   150,718
- ----------------------------------------------------------------------

- ----------------------------------------------------------------------
Grand
 Total     $440,854  $202,790  $208,157  $207,128  $207,290  $825,365
======================================================================


A = Actual




    CONTACT: Fair Isaac Corporation, Minneapolis
             Investors & Analysts:
             John D. Emerick, Jr., 612-758-5560
             johnemerick@fairisaac.com