Cabot Announces Third Quarter Operating Results

August 2, 2006

BOSTON, Aug. 2 /PRNewswire-FirstCall/ -- Cabot Corporation (NYSE: CBT) today announced net income of $25 million ($0.37 per diluted common share) for the third quarter of fiscal year 2006 ended June 30, 2006, compared to net income of $26 million ($0.39 per diluted common share) for the year ago quarter. The third fiscal quarter 2006 results included $2 million pre-tax of charges ($0.02 per diluted common share after tax) from certain items compared to $4 million pre-tax of charges ($0.04 per diluted common share after tax) from certain items in the third quarter of fiscal year 2005. Further details concerning certain items are included in Exhibit I of the press release.

In commenting on the results, Kennett F. Burnes, Cabot's Chairman and CEO, said, "We were, of course, not satisfied with our results for the quarter as we fell short of our own expectations. This shortfall was disappointing given the strong volume performance in all businesses. In particular, despite our Carbon Black Business having strong volumes, our inability to return to a more historic margin level unfavorably impacted performance. In addition, we had three cost issues during the quarter, higher utility costs, higher maintenance costs at Cabot Japan, and our aggressive initiative to reduce inventory levels, thereby reducing production levels, resulting in higher fixed costs per unit. Also, and as expected, the transition to market-based pricing and higher ore costs in the Supermetals Business reduced Cabot's overall profitability. We were pleased, however, to have our new capacity for our Carbon Black and Metal Oxides Businesses in China, and our inkjet colorants capacity expansion all successfully come on line during the quarter, particularly in a period of such strong demand."

The Carbon Black Business reported operating profits of $23 million compared to $26 million in both the third quarter of 2005 and the second quarter of 2006. Our carbon black product lines had solid volumes during the quarter. Rubber blacks volumes increased by 2% compared to the third quarter of 2005 and by 3% sequentially, and performance products returned to its more historic volume level with a 13% increase sequentially. Progress was made in restoring total variable margin during the quarter with margins in the third quarter of fiscal 2006 equivalent to those in the third quarter of fiscal 2005, but still below the levels seen prior to the recent period of continuously rising feedstock costs. In addition, quarterly operating costs were higher than we have experienced recently and three specific issues combined to reduce profitability by $9 million. First, higher utility costs impacted us by $2 million. Second, we made substantial progress in reducing operating working capital with a $38 million total improvement driven by a $28 million reduction in inventory. This resulted in a $4 million unfavorable impact on earnings from higher fixed costs per unit due to lower production levels. Third, Cabot Japan had higher maintenance costs, which unfavorably impacted us by $3 million.

The inkjet colorants product line continued to experience solid volume growth in both the OEM and aftermarket segments with a 40% increase over the third quarter of 2005 and a 4% increase over the second quarter of 2006. The transition from research to commercial grades, when compared to the third quarter of 2005, and some margin erosion, caused revenues to grow at a slower rate than volumes. Additionally, costs related to the new production capacity that is not yet being commercially utilized caused profitability to be lower both year over year and sequentially.

The Metal Oxides Business reported operating profits of $6 million during the quarter. This was $2 million higher than the third quarter of 2005 and $1 million higher than the second quarter of 2006. Fumed metal oxides continued to experience high capacity utilization and solid increases in demand, which led to higher profitability. Total volumes increased 11% compared to the third quarter of 2005, with higher electronics and niche volumes, and 3% sequentially. Favorable price mix and strong plant utilization more than offset increased year over year raw material and energy costs.

The Supermetals Business had a stronger than expected quarter, reporting $9 million in operating profits compared to $13 million in the third quarter of 2005 and $12 million in the second quarter of 2006. The continued transition from fixed price, fixed volume contracts to market-based arrangements and higher year over year raw material costs continue to unfavorably impact the business. However, the business is experiencing significant benefits from its previous cost reduction initiatives. We continue to make progress in reducing inventory levels, which have decreased by $46 million year to date.

During the third quarter of 2006, the Specialty Fluids Business reported operating profits of $5 million, equal to the third quarter of 2005, and $1 million higher than the second quarter of 2006. Utilization of our total available fluid decreased both year over year and sequentially but was offset by higher pricing on the quarter's activity. A labor strike at one of our large North Sea customers during the quarter, that has since been settled, caused delays in their drilling operations during the quarter and could impact our profitability for the full year by as much as $2 million. We were, however, extremely pleased to be awarded two appraisal wells in Argentina that we anticipate will begin to be drilled in the fourth quarter. If successful, this work could lead to the use of our fluid in additional wells and our first significant expansion outside of the North Sea.

With respect to the future, Burnes said, "Looking forward, we believe that our shortfall in performance during the third quarter will put us at the lower end of where we had hoped to be for the full year. We remain cautious given the energy costs we have all experienced over the past months and the potential impact of political instability in certain regions of the world. Given this uncertainty and our recent performance, we are taking a very close look at all of our costs and are looking for ways to further improve margins to ensure that the Carbon Black Business continues to earn an acceptable return. On a more positive note, we have recently seen an improvement in cash generation and a reduction in our net debt position. The contract transition in the Supermetals Business will continue to impact our overall financial performance and we remain focused on replacing lost contract volumes with market volumes and continuing our inventory reduction progress. We look forward to the strong utilization of our new capacity to serve growing demand in new markets and developing regions of the world and remain optimistic about the prospects for continued strong demand in our core businesses and ongoing growth in our new businesses."

Additional information regarding Cabot's third quarter fiscal year 2006 results is included in the Supplemental Business Information attached to the press release.

Included above are forward-looking statements relating to management's expectations regarding performance of our rubber blacks and performance products product lines; Cabot's overall business performance and prospects; our ability to replace lost contract volumes with open market volumes in the Supermetals Business; growth in inkjet colorants; the expansion of the Specialty Fluids Business outside of the North Sea; utilization of new capacity for rubber blacks, fumed metal oxides and inkjet colorants; and carbon black feedstock and natural gas prices. The following are some of the factors that could cause Cabot's actual results to differ materially from those expressed in the forward-looking statements: a continuing rise in feedstock costs and a higher than expected increase in natural gas prices; lower than expected demand for our products; Cabot's ability to generate cost savings and implement restructuring initiatives; the Company's ability to maintain and grow its position in the small office, home office printing market and to participate in the growth in emerging inkjet applications for black colorants and to develop and commercialize colored pigments (which may be disrupted or delayed by technical difficulties, market acceptance, competitors' new products or difficulties in moving from the experimental stage to the manufacturing stage); unexpected delays in drilling operations at wells recently awarded to the Specialty Fluids Business and the success of this Business in gaining wider acceptance by the energy industry of cesium formate as a drilling fluid and to penetrate new markets (including development of the required logistics to reach remote markets); and the timely customer acceptance of products from recent capacity expansion projects. Other factors and risks are discussed in the Company's 2005 Annual Report on Form 10-K with the Securities and Exchange Commission.

Cabot Corporation is a global specialty chemicals and materials company headquartered in Boston, MA. Cabot's major products are carbon black, fumed silica, inkjet colorants, capacitor materials, and cesium formate drilling fluids.

    Contact: Susannah R. Robinson
             Director, Investor Relations
             (617) 342-6129


    Third Quarter Earnings Announcement, Fiscal 2006

    CABOT CORPORATION CONSOLIDATED STATEMENTS OF OPERATIONS

    Periods ended June 30                   Three Months      Nine Months
    Dollars in millions, except per share
     amounts (unaudited)                    2006    2005    2006       2005

    Net sales and other operating
     revenues                               $666    $545   $1,880     $1,567
    Cost of sales                            551     427    1,574      1,202
      Gross profit                          $115    $118     $306       $365

    Selling and administrative expenses       59      63      176        173
    Research and technical expenses           14      14       41         43
    Goodwill asset impairment                  -       -        -         90
      Income from operations                 $42     $41      $89        $59

    Other income and expense
      Interest and dividend income             -       2        3          5
      Interest expense                        (6)     (8)     (19)       (24)
      Other income (expense)                  (2)      1        -          5
       Total other income and expense         (8)     (5)     (16)       (14)

    Income from continuing operations
     before income taxes                      34      36       73         45

    Provision for income taxes                (8)     (9)     (13)       (30)
    Equity in net income of affiliated
     companies, net of tax                     1       2        8          6
    Minority interest in net income, net
     of tax                                   (2)     (3)      (9)        (9)

    Net income from continuing operations     25      26       59         12

    Cumulative effect of an accounting
     change, net of tax                        -       -        2          -

    Net income                                25      26       61         12
    Dividends on preferred stock, net of
     tax                                      (1)     (1)      (2)        (2)
    Net income available to common shares    $24     $25      $59        $10

    Diluted income per common share
      Income from continuing operations    $0.37   $0.39    $0.85      $0.18

      Cumulative effect of an accounting
       change, net of tax                    $-       $-    $0.04         $-

       Net income                          $0.37   $0.39    $0.89      $0.18

    Weighted average common shares
     outstanding
      Diluted                                 69      69       69         69



    Third Quarter Earnings Announcement, Fiscal 2006

    CABOT CORPORATION SUMMARY RESULTS BY SEGMENTS

    Periods ended June 30                   Three Months      Nine Months
    Dollars in millions, except per share
     amounts (unaudited)                    2006    2005    2006       2005

    SALES

    Carbon Black Business                   $514    $387   $1,409     $1,101
      Rubber blacks                          367     252    1,011        712
      Performance products                   134     123      360        356
      Inkjet colorants                        12      10       35         28
      Superior MicroPowders                    1       2        3          5

    Metal Oxides Business                     66      57      185        175
      Fumed metal oxides                      65      57      184        175
      Aerogels                                 1       -        1          -

    Supermetals Business                      66      93      226        256
    Specialty Fluids Business                 12      11       33         26
      Segment sales (A)                      658     548    1,853      1,558
    Unallocated and other (B)                  8      (3)      27          9
      Net sales and other operating
       revenues                             $666    $545   $1,880     $1,567

    SEGMENT PROFIT

    Carbon Black Business                    $23     $26      $70        $97
    Metal Oxides Business                      6       4       13         15
    Supermetals Business                       9      13       32         45
    Specialty Fluids Business                  5       5       13         11
      Total Segment Profit (C)                43      48      128        168

    Interest expense                          (6)     (8)     (19)       (24)
    General unallocated income
     (expense) (D)                            (2)     (2)     (28)       (93)
    Less: Equity in net income of
     affiliated companies, net of tax         (1)     (2)      (8)        (6)
    Income from continuing operations
     before income taxes                      34      36       73         45
    Provision for income taxes                (8)     (9)     (13)       (30)
    Equity in net income of affiliated
     companies, net of tax                     1       2        8          6
    Minority interest in net income, net
     of tax                                   (2)     (3)      (9)        (9)
     Income from continuing operations        25      26       59         12
    Cumulative effect of an accounting
     change, net of tax (E)                    -       -        2          -
    Net income                                25      26       61         12
    Dividends on preferred stock, net of
     tax                                      (1)     (1)      (2)        (2)
    Net income available to common shares    $24     $25      $59        $10

    Diluted earnings per common share
      Income from continuing operations    $0.37   $0.39    $0.85      $0.18
      Cumulative effect of an accounting
       change, net of tax (E)                 $-      $-    $0.04         $-
      Net income                           $0.37   $0.39    $0.89      $0.18

    Weighted average common shares
     outstanding
      Diluted                                 69      69       69         69


    (A) Segment sales for certain operating segments within the Carbon Black
        Business include 100% of sales of one equity affiliate and transfers
        of materials at cost and at market-based prices.

    (B) Unallocated and other reflects an elimination for sales of one equity
        affiliate offset by royalties paid by equity affiliates and external
        shipping and handling fees.

    (C) Segment profit is a measure used by Cabot's operating decision-makers
        to measure consolidated operating results and assess segment
        performance.  Segment profit includes equity in net income of
        affiliated companies, royalties paid by equity affiliates, minority
        interest and allocated corporate costs.

    (D) General unallocated income (expense) includes foreign currency
        transaction gains (losses), interest income, dividend income, and the
        certain items listed in Exhibit I, including charges in the
        Supermetals Business of $90 million of goodwill impairment in the
        second quarter of 2005 and the $27 million Gwalia settlement payment
        in the second quarter of 2006.

    (E) Amounts related to the cumulative benefit resulting from the adoption
        of FAS 123(R) in the first quarter of 2006, net of tax.



    Third Quarter Earnings Announcement, Fiscal 2006

    CABOT CORPORATION CONDENSED CONSOLIDATED FINANCIAL POSITION

                                              June 30,   September 30,
                                                2006         2005
    Dollars in millions                      (unaudited)

    Current assets:

      Cash and cash equivalents                 $114         $181
      Short-term marketable securities
       investments                                 1           30
      Accounts and notes receivable, net
       of reserve for doubtful accounts
       of $7 and $4                              541          430
      Inventories:
           Raw materials                         144          169
           Work in process                       120          134
           Finished goods                        145          151
           Other                                  39           39
                Total inventories                448          493
      Prepaid expenses and other current
       assets                                     92           66
      Assets held for sale                         -            5
      Deferred income taxes                       50           41
           Total current assets                1,246        1,246

    Investments:
      Equity affiliates                           57           63
      Long-term marketable securities and
       cost investments                            3            6
           Total investments                      60           69

    Property, plant and equipment              2,479        2,264
    Accumulated depreciation and
     amortization                             (1,530)      (1,430)
         Net property, plant and
          equipment                              949          834

    Other assets:
      Goodwill                                    35           25
      Intangible assets, net of
       accumulated amortization of $9
       and $9                                      5            6
      Assets held for rent                        39           37
      Deferred income taxes                      106          108
      Other assets                                58           49


           Total other assets                    243          225

    Total assets                              $2,498       $2,374



    Third Quarter Earnings Announcement, Fiscal 2006

    CABOT CORPORATION CONDENSED CONSOLIDATED FINANCIAL POSITION

                                              June 30,  September 30,
                                               2006         2005
    Dollars in millions,                    (unaudited)
     except for share and per share amounts

    Current liabilities:

      Notes payable to banks                     $44          $34
      Accounts payable and accrued
       liabilities                               369          321
      Income taxes payable                        44           30
      Deferred income taxes                        1            1
      Current portion of long-term debt           39           47
           Total current liabilities             497          433

    Long-term debt                               458          463
    Deferred income taxes                         13           15
    Other liabilities                            292          307

    Commitments and contingencies

    Minority interest                             64           57

    Stockholders' equity:
      Preferred stock:
        Authorized:  2,000,000 shares of $1 par
         value Series B ESOP Convertible
         Preferred Stock 7.75% Cumulative
         issued: 75,336 shares; outstanding:
         57,043 and 61,068 shares
         (aggregate per share
        Redemption value of $40 and $44)          57           61
        Less cost of shares of preferred
         treasury stock                          (38)         (38)
      Common stock:
        Authorized: 200,000,000 shares
         of $1 par value Issued and
         outstanding: 63,452,646 and
         62,971,872                               63           63
        Less cost of shares of common
         treasury stock                           (5)          (5)
    Additional paid-in capital                    21           32
    Retained earnings                          1,144        1,127
    Unearned compensation                          -          (41)
    Deferred employee benefits                   (39)         (42)
    Notes receivable for restricted stock        (15)         (19)
    Accumulated other comprehensive loss         (14)         (39)
           Total stockholders' equity          1,174        1,099

    Total liabilities and stockholders'
     equity                                   $2,498       $2,374



    CABOT CORPORATION
                                                     Fiscal 2005
    In millions, except per share
     amounts (unaudited)              Dec. Q.  Mar. Q. June Q. Sept. Q.  FY

    Sales
    Carbon Black Business               $345    $369    $387    $389   $1,490
       Rubber blacks                     225     235     252     264      976
       Performance products              110     123     123     113      469
       Inkjet colorants                    9       9      10      11       39
       Superior MicroPowders               1       2       2       1        6
    Metal Oxides Business                 60      58      57      56      231
       Fumed metal oxides                 60      58      57      56      231
       Aerogels                            -       -       -       -        -
    Supermetals Business                  77      86      93      90      346
    Specialty Fluids Business              7       8      11      14       40
       Segment Sales (A)                 489     521     548     549    2,107
    Unallocated and other (B)              6       6      (3)      9       18

    Net sales and other operating
     revenues                           $495    $527    $545    $558   $2,125

    Segment Profit (Loss)
    Carbon Black Business                $30     $41     $26     $(4)     $94
    Metal Oxides Business                  6       5       4       1       16
    Supermetals Business                  16      16      13       7       52
    Specialty Fluids Business              2       4       5       7       17
       Total segment profit (C)           54      66      48      11      179

    Net Income (Loss) Available to
     Common Shares
    Interest expense                      (8)     (8)     (8)     (5)     (29)
    General unallocated income
     (expense) (D)                         1     (91)     (2)   (139)    (231)
    Less: Equity in net income of
     affiliated companies, net of tax     (2)     (2)     (2)     (6)     (12)

    Income (Loss) from Continuing
     Operations before income taxes       45     (35)     36    (139)     (93)
    (Provision) benefit for income
     taxes                                (9)    (13)     (9)     76       45
    Equity in net income of affiliated
     companies, net of tax                 2       2       2       6       12
    Minority interest in net income, net
     of tax                               (3)     (4)     (3)     (2)     (12)

    Income (Loss) from Continuing
     Operations                           35     (50)     26     (59)     (48)
    Cumulative effect of an accounting
     change, net of tax (E)                -       -       -       -        -

    Net income (loss)                     35     (50)     26     (59)     (48)
    Dividends on preferred stock, net of
     tax                                  (1)      -      (1)     (1)      (3)

       Net income (loss) available to
        common shares                    $34    $(50)    $25    $(60)    $(51)

    Diluted income (loss) per
     common share
    Income (Loss) from Continuing
     Operations                        $0.51  $(0.84)  $0.39  $(1.02)  $(0.84)
    Cumulative effects of an accounting
     change, net of tax (E)                -       -       -       -        -
    Net income (loss)                  $0.51  $(0.84)  $0.39  $(1.02)  $(0.84)
    Weighted average common shares
     outstanding
    Diluted (F)                           69      60      69      59       60



    CABOT CORPORATION
                                                      Fiscal  2006
    In millions, except per share
     amounts (unaudited)               Dec. Q. Mar. Q. June Q. Sept. Q.  FY

    Sales
    Carbon Black Business               $419    $476    $514           $1,409
       Rubber blacks                     298     346     367            1,011
       Performance products              109     117     134              360
       Inkjet colorants                   11      12      12               35
       Superior MicroPowders               1       1       1                3
    Metal Oxides Business                 57      62      66              185
       Fumed metal oxides                 57      62      65              184
       Aerogels                            -       -       1                1
    Supermetals Business                  93      67      66              226
    Specialty Fluids Business             10      11      12               33
       Segment Sales (A)                 579     616     658            1,853
    Unallocated and other (B)              8      11       8               27

    Net sales and other operating
     revenues                           $587    $627    $666           $1,880

    Segment Profit (Loss)
    Carbon Black Business                $21     $26     $23              $70
    Metal Oxides Business                  2       5       6               13
    Supermetals Business                  11      12       9               32
    Specialty Fluids Business              4       4       5               13
       Total segment profit (C)           38      47      43              128

    Net Income (Loss) Available to Common
     Shares
    Interest expense                      (6)     (7)     (6)             (19)
    General unallocated income (expense)
     (D)                                  (2)    (24)     (2)             (28)
    Less: Equity in net income of
     affiliated companies, net of tax     (3)     (4)     (1)              (8)

    Income (Loss) from Continuing
     Operations before income taxes       27      12      34               73
    (Provision) benefit for income taxes  (4)     (1)     (8)             (13)
    Equity in net income of affiliated
     companies, net of tax                 3       4       1                8
    Minority interest in net income, net
     of tax                               (4)     (3)     (2)              (9)

    Income (Loss) from Continuing
     Operations                           22      12      25               59
    Cumulative effect of an accounting
     change, net of tax (E)                2       -       -                2

    Net income (loss)                     24      12      25               61
    Dividends on preferred stock,
     net of tax                           (1)      -      (1)              (2)

       Net income (loss) available to
        common shares                    $23     $12     $24              $59

    Diluted income (loss)
     per common share
    Income (Loss) from Continuing
     Operations                        $0.31   $0.17   $0.37            $0.85
    Cumulative effects of an accounting
     change, net of tax (E)             0.04       -       -             0.04
    Net income (loss)                  $0.35   $0.17   $0.37            $0.89
    Weighted average common shares
     outstanding
    Diluted (F)                           68      69      69               69


    (A) Segment sales for certain operating segments within the Carbon Black
        Business include 100% of sales of one equity affiliate and transfers
        of materials at cost and at market-based prices.
    (B) Unallocated and other reflects an elimination for sales for one equity
        affiliate offset by royalties paid by equity affiliates, external
        shipping and handling fees.
    (C) Segment profit is a measure used by Cabot's operating decision-makers
        to measure consolidated operating results and assess segment
        performance. Segment profit includes equity in net income of
        affiliated companies and excludes royalties paid by equity affiliates,
        minority interest and allocated corporate costs.
    (D) General unallocated income (expense) includes foreign currency
        transaction gains (losses), interest income, dividend income and
        certain items listed in Exhibit I. These amounts also include the
        following charges in the Supermetals Business: $90 million of goodwill
        impairment charges recorded in the second quarter of 2005, $121
        million of long-lived asset impairment charges recorded in the fourth
        quarter of fiscal 2005 and the $27 million settlement payment in the
        second quarter of 2006.
    (E) Amounts relate to the cumulative benefit resulting from the adoption
        of FAS 123(R) in the first quarter of 2006, net of tax.
    (F) The weighted average common shares outstanding for the quarter ending
        March 31, 2005 and the quarter and year ending September 30, 2005
        reflects the exclusion of those shares that would be antidilutive due
        to the company's net loss position in these periods.  The shares
        excluded totaled approximately 9 million shares for the quarter ending
        March 31, 2005 and approximately 9 million and 8 million shares,
        respectively, for the quarter and year ending September 30, 2005.


    Third Quarter Earnings Announcement, Fiscal 2006

    CABOT CORPORATION CERTAIN ITEMS - Exhibit I

    Periods ended
     June 30               Three Months                   Nine Months
    Dollars in
     millions,
     except per
     share amounts
    (unaudited)     2006   2006    2005   2005   2006   2006     2005   2005
                           per            per           per             per
                     $    share(A)  $   share(A)  $    share(A)   $   share(A)

    Certain items
     before income
     taxes

    Restructuring
     initiatives     $(1) $(0.01)  $(4) $(0.04)  $(4)  $(0.04) $(12)  $(0.12)

    Cost reduction
     initiatives      (1)  (0.01)    -       -    (4)   (0.04)    -        -

    Gwalia settlement
     payment           -       -     -       -   (27)   (0.25)    -        -

    Goodwill asset
     impairment        -       -     -       -     -        -   (90)   (1.30)


      Total
       certain
       items          (2)  (0.02)   (4)  (0.04)  (35)   (0.33) (102)   (1.42)

    Cumulative effect
     of an accounting
     change (B)        -       -     -       -     4     0.04     -        -

      Total certain
       items and
       cumulative
       effect of
       an accounting
       change         (2)  (0.02)   (4)  (0.04)  (31)   (0.29) (102)   (1.42)

    Tax impact of
     certain items
     and cumulative
     effect of
     an accounting
     change (C)        -       -     1       -    10        -     6     0.04

    Total certain
     items and
     cumulative
     effect of
     an accounting
     change,
     after tax       $(2) $(0.02)  $(3) $(0.04) $(21)  $(0.29) $(96)  $(1.38)



    Periods ended June 30                    Three Months       Nine Months
    Dollars in millions (unaudited)         2006     2005     2006      2005

    Statement of Operations Line Item
    Net sales and other operating
     revenues                                $-       $-       $1        $-
    Cost of sales                            (1)      (4)     (31)      (11)
    Selling and administrative expenses      (1)       -       (5)       (1)
    Goodwill asset impairment                 -        -        -       (90)
     Total certain items                    $(2)     $(4)    $(35)    $(102)


    (A) Per share amounts are calculated after tax.
    (B) Cumulative benefit resulting from adoption of FAS 123(R) in the first
        quarter of 2006, net of tax.
    (C) Represents tax impact of certain items and cumulative effect of
        an accounting change.



                              CABOT CORPORATION
                        THIRD QUARTER FISCAL YEAR 2006
                      SUPPLEMENTAL BUSINESS INFORMATION
                                 (Unaudited)

    Business Segment Analysis

Volume changes for the third quarter of 2006 compared to the third quarter of 2005 and the second quarter of 2006 were as follows:


    Business Segment            Q3 2006 vs Q3 2005      Q3 2006 vs Q2 2006
    Carbon Black Business
      Rubber Blacks *                   2  %                  3 %
      Performance Products             (3) %                 13 %
      Inkjet Colorants                 40  %                  4 %
    Metal Oxides Business
      Fumed Metal Oxides               11  %                  3 %
    Supermetals Business               (9) %                  8 %

    * volume changes in the Carbon Black Business exclude Cabot Japan volumes

    Rubber Blacks Regional Analysis

Volume changes by region for the third quarter of 2006 compared to the third quarter of 2005 and the second quarter of 2006 were as follows:


    Region                      Q3 2006 vs Q3 2005      Q3 2006 vs Q2 2006
    North America                      (2) %                (2) %
    South America                       4  %                11  %
    Europe                              3  %                (2) %
    Asia Pacific *                     (7) %                 3  %
    China                              17  %                13  %

    * volume changes in Asia Pacific region exclude Cabot Japan volumes

    Capital Expenditures
    Cabot invested approximately $43 million in capital expenditures during
the third quarter of 2006 compared to $45 million during the third quarter of
2005.

    Share Repurchases

                                         Q1 FY06     Q2 FY06       Q3 FY06
    Total Shares Repurchased             85,733       76,316       246,309
    Open Market Shares Repurchased            -            -             -
    Cash Cost of Open Market Purchases        -            -             -

   * Approximately 2.7 million shares remain available for purchase under the
     current Board of Directors' authorization.

    Working Capital

During the third quarter of 2006 working capital decreased by $53 million on a constant dollar basis ($45 million at actual exchange rates) driven by reduced inventory levels and an increase in payables. The decrease was partially offset by higher accounts receivable levels from strong volumes and price increases, and upward pressure on inventory costs resulting from higher feedstock costs.

Effective Tax Rate

The Company's effective tax rate for both net income and net income from continuing operations was 22% for the third quarter of 2006.

SOURCE Cabot Corporation 08/02/2006 CONTACT: Susannah R. Robinson, Director, Investor Relations, of Cabot Corporation, +1-617-342-6129 Web site: http://www.cabot-corp.com

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