Cabot Announces Fourth Quarter and Fiscal Year Operating Results

November 1, 2006

BOSTON, Nov. 1 /PRNewswire-FirstCall/ -- Cabot Corporation (NYSE: CBT) today announced net income of $27 million ($0.39 per diluted common share) for the fourth quarter of 2006 and net income of $88 million ($1.28 per diluted common share) for the full fiscal year 2006. This is compared to a net loss of $59 million (a loss of $1.02 per common share) for the fourth quarter of fiscal 2005 and a net loss of $48 million (a loss of $0.84 per common share) for the full fiscal year 2005. These results are discussed in further detail below.

In commenting on the results, Kennett F. Burnes, Cabot's Chairman and CEO, said, "On the whole, we are pleased with our fourth quarter financial results and we were able to manage the significant challenges we faced during the year, specifically the volatility in feedstock and energy prices. Demand for products in all of our businesses remained strong during the quarter and we continued the trend of improving cash generation. During the quarter we also faced the difficult task of reducing costs by eliminating jobs within the Company. These actions are never easy and not something we take lightly, but we felt it was a necessary step in reducing the overall costs in the Company, particularly in the carbon black product lines."

During the fourth quarter, rubber blacks and performance products returned to more normal levels of operations and profitability. Volume growth in rubber blacks remained strong with continued growth in our developing regions and a less than typical seasonal slowdown. Unit margins in performance products continued to improve due to price increases throughout the year and both rubber blacks and performance products benefited from lower feedstock prices, which positively impacted the business, principally in North America. Additionally, over the course of the past 12 to 18 months rubber blacks and performance products operated with significantly fewer days of inventory. During the fourth quarter of fiscal 2005 these efforts, along with other inventory charges, resulted in a $16 million unfavorable impact on profitability. As the inventory reduction was essentially completed by the fourth quarter of fiscal 2006, there was not a similar expense during the quarter. Cabot Japan had a positive impact on the Company's operating profits during both the fourth quarter and full fiscal year.

Once complete, cost reduction actions taken during the fourth quarter of 2006 are anticipated to yield savings of approximately $20 million annually. These efforts include a formal staffing reduction initiative, savings from open positions that will not be refilled, and savings achieved through other cost elimination activities. These initiatives resulted in a pre-tax charge of $10 million during the fourth quarter.

The inkjet colorants product line had somewhat weaker profitability during the fourth quarter but a solid full fiscal year 2006. During the fourth quarter, volumes increased 21% compared to the same period in 2005 driven primarily by growth in the OEM market segment. For the full year, volumes increased 36% with growth in both the OEM and aftermarket segments. An OEM inventory drawdown in the fourth quarter, along with softening demand in the aftermarket segment, unfavorably impacted the product line's results in the quarter. We were successful during the quarter at qualifying our new manufacturing line for the high-speed inkjet market in anticipation of commercial product launches in the spring of 2007. However, unfavorable price mix and costs related to this new production capacity, which is not yet being fully commercially utilized, impacted the profitability of the product line during the quarter.

Fumed silica volumes grew by 20% in the fourth quarter when compared to the same period in fiscal 2005 driven by the niche and electronics segments. For the full fiscal year, volume growth of 9% and high plant utilization more than offset higher hydrogen and natural gas costs and startup costs associated with our new fumed silica plant in China, which is operating at nearly 90% of its designed capacity.

As anticipated, for the full fiscal year, the ongoing transition from fixed price, fixed volume contracts to market based arrangements unfavorably impacted the profitability of the Supermetals Business compared to fiscal year 2005. We were successful during the year in replacing our lost contracted volumes with open market volumes, albeit at significantly lower prices. The Business experienced significant benefits from its previous cost reduction efforts leading to lower costs of nearly $40 million during 2006. Additionally, we made significant progress toward reducing inventory levels, which decreased by $55 million during the fiscal year against our multi-year target of $100 million.

The reduction in profitability in the Specialty Fluids Business during the fourth quarter and fiscal year 2006 was driven by reduced activity in the North Sea, specifically one larger than average job in 2005 that was not replicated during 2006. We were encouraged, however, that our first well in Argentina was successfully completed during the quarter.

Detailed Financial Information

For the fourth quarter and full fiscal year the Company reported segment income as follows (amounts shown are in millions of dollars):


                        Fourth quarter Fourth quarter Fiscal year Fiscal year
                              2006         2005          2006        2005

    Carbon Black              $ 35        $ (4)         $ 105        $ 94
    Metal Oxides                 5           1            18           16
    Supermetals                  9           7            41           52
    Specialty Fluids             3           7            16           17

In addition to the items listed below, other unallocated items are fully described in the "Summary Results by Segment" table of the press release.

Net income included the following (amounts shown are pre-tax except per share amounts, which are after-tax):


    Fourth quarter fiscal 2006                        $,        per diluted
                                                   millions    common share
    (Charges) / Income
    Restructuring activities related
     to staffing reductions                        $ (10)        $ (0.10)
    Charges related to closing carbon
     black facility in Australia                      (7)          (0.11)
    Recognition of asset retirement
     obligations (FIN 47)                             (6)          (0.07)
    Tax benefit related to settlement of
     various tax audits                               14            0.21
    Tax settlement from discontinued
     liquified natural gas business                    2            0.03


    Fourth quarter fiscal 2005                        $,            per
                                                   millions     common share
    (Charges) / Income
    Writeoff of long-lived assets in the
     Supermetals Business                         $ (121)        $ (1.12)
    Supermetals cost reduction initiatives           (15)          (0.19)
    Charges related to closing carbon black
     facility in Australia                            (3)          (0.05)


    Full fiscal year 2006                             $,         per diluted
                                                   millions     common share
    (Charges) / Income
    Restructuring activities related to
     staffing reductions                           $ (10)        $ (0.10)
    Charges related to closing carbon black
     facility in Australia                           (11)          (0.15)
    Supermetals cost reduction initiatives            (3)          (0.04)
    Lump sum payment related to termination
     of supply agreement                             (27)          (0.25)
    Recognition of asset retirement
     obligations (FIN 47)                             (6)          (0.07)
    Tax benefit related to settlement of
     various tax audits                               22            0.32
    Tax settlement from discontinued
     liquified natural gas business                    2            0.03
    Impact of stock-based compensation (FAS 123R)      4            0.04


    Full fiscal year 2005                             $,            per
                                                  millions      common share
    (Charges) / Income
    Writeoff of assets, including goodwill,
     in Supermetals Business                      $ (211)        $ (2.44)
    Supermetals cost reduction initiatives           (15)          (0.19)
    Charges related to closing carbon black
     facility in Australia                           (16)          (0.19)

    Outlook

With respect to the future, Burnes said, "While we continue to remain concerned about the volatility of energy prices because of the impact that they inevitably have on our business, we are confident that we have positioned the Company well to withstand these types of disruptions on a long-term basis. We remain cautious given our current understanding of North American carbon black demand and announced plant closures in the tire industry, and we will continue to follow demand in this important region closely. We face another step down in profitability in the Supermetals Business in the second quarter of fiscal 2007 as the last of our significant long-term supply contracts expires in December 2006. We are confident this business will remain profitable and we must continue to work hard to improve its performance going forward."

Burnes continued, "We anticipate continued healthy growth in demand overall and remain pleased with our strong position in emerging markets which are proving to be our most profitable regions. If market conditions remain stable and energy prices remain at their current levels, we are optimistic that we will see continued benefits in the carbon black product lines. We are pleased with the strong demand we are seeing in the fumed silica product line and anticipate that the high utilization of our plants will continue through at least the first half of fiscal 2007. We are excited about the prospects for our inkjet colorants product line, particularly as high speed inkjet printing is commercialized. With the success of the well in Argentina, we are also increasingly optimistic that we will see significant business for our cesium formate drilling fluids outside of the North Sea in the relatively near future. We remain as convinced as ever that our strategy of optimizing our core businesses and nurturing new business opportunities with patience and persistence is the best way to increase shareholder value."

For those interested in more detailed information regarding Cabot's fourth quarter and full fiscal year 2006 results, please see the Supplemental Business Information available on the Company's website in the Investor Relations section: http://investor.cabot-corp.com. Further details concerning certain items, cumulative effects of accounting changes and discontinued operations are included in Exhibit I of the press release.

Included above are forward-looking statements relating to management's expectations regarding demand for our products; the savings we expect to achieve from cost reduction initiatives; our overall business performance and prospects; our ability to replace lost contract volumes with open market volumes in the Supermetals Business and maintain that Business's profitability; utilization of new capacity for fumed metal oxides and inkjet colorants; carbon black feedstock and natural gas prices; and acceptance of our cesium formate drilling fluids outside of the North Sea. 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; our inability to maintain cost savings from restructuring activities; our inability to maintain and grow our position in the small office, home office printing market and to participate in the growth in emerging inkjet applications; 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



    Fourth Quarter Earnings Announcement, Fiscal 2006


    CABOT CORPORATION CONSOLIDATED STATEMENTS OF OPERATIONS


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

    Net sales and other operating revenues  $663    $558  $2,543    $2,125
    Cost of sales                            550     490   2,124     1,692
      Gross profit                          $113     $68    $419      $433

    Selling and administrative expenses       59      67     235       240
    Research and technical expenses           17      16      58        59
    Goodwill asset impairment                  -       -       -        90
    Long-lived asset impairment                -     121       -       121
      Income (loss) from operations          $37   $(136)   $126      $(77)


    Other income and expense
      Interest and dividend income             2       1       5         6
      Interest expense                        (8)     (5)    (27)      (29)
      Other income                            (7)      1      (7)        7
        Total other income and expense       (13)     (3)    (29)      (16)

    Income (loss) from continuing
     operations before income taxes           24    (139)     97       (93)


    Benefit (provision) for income taxes       4      76      (9)       45
    Equity in net income of affiliated
     companies, net of tax                     4       6      12        12
    Minority interest in net income, net
     of tax                                   (3)     (2)    (12)      (12)

    Net income (loss) from continuing
     operations                               29     (59)     88       (48)

    Cumulative effect of accounting
     changes, net of tax                      (4)      -      (2)        -

    Discontinued Operations, net of tax        2       -       2         -

    Net income (loss)                         27     (59)     88       (48)
    Dividends on preferred stock, net of
     tax benefit                               -      (1)     (2)       (3)
    Net income (loss) available to common
     shares                                  $27    $(60)    $86      $(51)

    Diluted earnings per share of common
     stock
      Net income (loss) from continuing
       operations                          $0.43  $(1.02)  $1.28    $(0.84)
      Cumulative effect of accounting
       change, net of tax                  (0.07)    -     (0.03)     $-
      Discontinued Operations               0.03            0.03
        Net income (loss)                  $0.39  $(1.02)  $1.28    $(0.84)

    Weighted average common shares
     outstanding, in millions
      Diluted (A)                             68      59      68        60

      (A) The weighted average common shares outstanding for the quarter and
          year ending September 30, 2005 excludes approximately
          9 million and 8 million shares, respectively, as those shares would
          be antidilutive due to the Company's net loss position.



    CABOT CORPORATION SUMMARY RESULTS BY SEGMENTS


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

    SALES

    Carbon Black Business                   $508    $389  $1,917    $1,490
      Rubber blacks                          367     264   1,378       976
      Performance products                   128     113     488       469
      Inkjet colorants                        12      11      47        39
      Superior MicroPowders                    1       1       4         6

    Metal Oxides Business                     69      56     254       231
      Fumed metal oxides                      69      56     253       231
      Aerogel                                  -       -       1         -

    Supermetals Business                      66      90     292       346

    Specialty Fluids Business                 11      14      44        40
      Segment sales (A)                      654     549   2,507     2,107

    Unallocated and other (B)                  9       9      36        18
      Net sales and other operating
       revenues                             $663    $558  $2,543    $2,125

    SEGMENT PROFIT (LOSS)

    Carbon Black Business                    $35     $(4)   $105       $94
    Metal Oxides Business                      5       1      18        16
    Supermetals Business                       9       7      41        52
    Specialty Fluids  Business                 3       7      16        17

      Total Segment Profit (C)                52      11     180       179

    Interest expense                          (8)     (5)    (27)      (29)
    General unallocated expense (D)          (16)   (139)    (44)     (231)
    Less: Equity in net income of
     affiliated companies, net of tax         (4)     (6)    (12)      (12)
    Income (loss) from continuing
     operations before income taxes           24    (139)     97       (93)
    Benefit (provision) for income taxes       4      76      (9)       45
    Equity in net income of affiliated
     companies, net of tax                     4       6      12        12
    Minority interest in net income, net
     of tax                                   (3)     (2)    (12)      (12)
    Net income (loss) from continuing
     operations                               29     (59)     88       (48)
    Cumulative effect of accounting
     changes, net of taxes (E)                (4)      -      (2)        -
    Discontinued Operations (F)                2       -       2         -
    Net income (loss)                         27     (59)     88       (48)
    Dividends on preferred stock, net of
     tax benefit                               -      (1)     (2)       (3)
    Net income (loss) available to common
     shares                                  $27    $(60)    $86      $(51)

    Diluted earnings per share of common
     stock
      Income (loss) from continuing
       operations                          $0.43  $(1.02)  $1.28    $(0.84)
      Cumulative effect of accounting
       changes, net of tax (E)            $(0.07)   $-    $(0.03)     $-
      Discontinued Operations (F)          $0.03    $-     $0.03      $-
      Net income (loss)                    $0.39  $(1.02)  $1.28    $(0.84)

    Weighted average common shares
     outstanding, in millions
      Diluted (G)                             68      59      68        60


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

    (B) Unallocated and other reflects an elimination of sales for 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 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, $121 million of long-lived asset impairment charges recorded
        in the fourth 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 are $0.04 and
        amounts related to the cumulative expense resulting from the adoption
        of FIN 47 in the fourth quarter of 2006, net of tax are $(0.07).

    (F) Amount relates to a favorable tax settlement recognized during the
        period related to our discontinued liquified natural gas
        business.

    (G) The weighted average common shares outstanding for the quarter and
        year ending September 30, 2005 excludes approximately
        9 million and 8 million shares, respectively, as those shares would
        be antidilutive due to the Company's net loss position.



    CABOT CORPORATION CONDENSED CONSOLIDATED FINANCIAL POSITION


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

    Current assets:

      Cash and cash equivalents                     $189            $181
      Short-term marketable securities
       investments                                     1              30
      Accounts and notes receivable, net
       of reserve for doubtful accounts
       of $6 and $4                                  533             430
      Inventories:
           Raw materials                             131             169
           Work in Process                           109             134
           Finished goods                            139             151
           Other                                      41              39
                Total inventories                    420             493
      Prepaid expenses and other current
       assets                                         75              66
      Assets held for sale                             -               5
      Deferred income taxes                           36              41
           Total current assets                    1,254           1,246

    Investments:
      Equity affiliates                               59              63
      Long-term marketable securities and
       cost investments                                3               6
           Total investments                          62              69

    Property, plant and equipment                  2,531           2,264
    Accumulated depreciation and
     amortization                                 (1,567)         (1,430)
         Net property, plant and
          equipment                                  964             834

    Other assets:
      Goodwill                                        31              25
      Intangible assets, net of
       accumulated amortization of $10
       and $9                                          5               6
      Assets held for rent                            40              37
      Deferred income taxes                           99             108
      Other assets                                    77              49


           Total other assets                        252             225

    Total assets                                  $2,532          $2,374



    CABOT CORPORATION CONDENSED CONSOLIDATED FINANCIAL POSITION


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

    Current liabilities:

      Notes payable to banks                           $58           $34
      Accounts payable and accrued
       liabilities                                     384           321
      Income taxes payable                              23            30
      Deferred income taxes                              2             1
      Current portion of long-term debt                 34            47
           Total current liabilities                   501           433

    Long-term debt                                     459           463
    Deferred income taxes                               20            15
    Other liabilities                                  288           307

    Minority interest                                   68            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:
         55,895 and 61,068 shares
         (aggregate Redemption value
         of $39 and $44)                                56            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: 63,579,040 and
         62,971,872                                     64            63
        Less cost of shares of common
         treasury stock                                 (5)           (5)
    Additional paid-in capital                           7            32
    Retained earnings                                1,160         1,127
    Unearned compensation                                -           (41)
    Deferred employee benefits                         (38)          (42)
    Notes receivable for restricted stock              (20)          (19)
    Accumulated other comprehensive
     income (loss)                                      10           (39)
           Total stockholders' equity                1,196         1,099

    Total liabilities and stockholders'
     equity                                         $2,532        $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
       Aerogel                               -       -      -       -       -
    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                         2       4      5       7      17
       Total segment profit (C)             54      66     48      11     179

    Income (Loss) from operations
    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)

    Net income (Loss) from Continuing
     Operations                             35     (50)    26     (59)    (48)
    Cumulative effect of accounting
     changes, net of taxes (E)               -       -      -       -     -
    Discontinued Operations (F)              -       -      -       -     -

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

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

    Net income (Loss) per common share
    Net income (loss) from Continuing
     Operations                          $0.51  $(0.84) $0.39  $(1.02) $(0.84)
    Cumulative Effects of Accounting
     Changes, net of tax (E)               -       -      -       -       -
    Discontinued Operations (F)            -       -      -       -       -
    Net income (loss)                    $0.51  $(0.84) $0.39  $(1.02) $(0.84)
    Weighted average common shares
     outstanding, in millions
    Diluted (G)                             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   $508  $1,917
       Rubber blacks                        298     346    367   $367   1,378
       Performance products                 109     117    134   $128     488
       Inkjet colorants                      11      12     12    $12      47
       Superior MicroPowders                  1       1      1     $1       4
    Metal Oxides Business                    57      62     66    $69     254
       Fumed metal oxides                    57      62     65    $69     253
       Aerogel                                -       -      1      -       1
    Supermetals Business                     93      67     66    $66     292
    Specialty Fluids Business                10      11     12    $11      44
       Segment Sales (A)                    579     616    658    654   2,507
    Unallocated and other (B)                 8      11      8      9      36

    Net sales and other operating
     revenues                              $587    $627   $666   $663  $2,543

    Segment Profit (Loss)
    Carbon Black Business                   $21     $26    $23    $35    $105
    Metal Oxides Business                     2       5      6      5      18
    Supermetals Business                     11      12      9      9      41
    Specialty Fluids                          4       4      5      3      16
       Total segment profit (C)              38      47     43     52     180

    Income (Loss) from operations
    Interest expense                         (6)     (7)    (6)    (8)    (27)
    General unallocated income (expense)
     (D)                                     (2)    (24)    (2)   (16)    (44)
    Less: Equity in net income of
     affiliated companies, net of tax        (3)     (4)    (1)    (4)    (12)
                                                                    -
    Income (Loss) from Continuing
     Operations before income taxes          27      12     34     24      97
    (Provision) benefit for income taxes     (4)     (1)    (8)     4      (9)
    Equity in net income of affiliated
     companies, net of tax                    3       4      1      4      12
    Minority interest in net income, net
     of tax                                  (4)     (3)    (2)    (3)    (12)

    Net income (Loss) from Continuing
     Operations                              22      12     25     29      88
    Cumulative effect of accounting
     changes, net of taxes (E)                2       -      -     (4)     (2)
    Discontinued Operations (F)               -       -      -      2       2

    Net income (loss)                        24      12     25     27      88
    Dividends on preferred stock, net of
     tax benefit                             (1)      -     (1)     -      (2)
                                                               .
       Net income (loss) available to
        common shares                       $23     $12    $24    $27     $86

    Net income (Loss) per common share
    Net income (loss) from Continuing
     Operations                           $0.31   $0.17  $0.37  $0.43   $1.28
    Cumulative Effects of Accounting
     Changes, net of tax (E)               0.04     -      -    (0.07)  (0.03)
    Discontinued Operations (F)             -       -      -     0.03    0.03
    Net income (loss)                     $0.35   $0.17  $0.37  $0.39   $1.28
    Weighted average common shares
     outstanding, in millions
    Diluted (G)                              68      69     69     68      68


    (A) Segment sales for certain operating segments within the Carbon Black
        Business include 100% of sales of one equity affiliate 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 of $0.04 and
        amounts related to the cumulative expense resulting from the adoption
        of FIN 47 in the fourth quarter of 2006, net of tax of ($0.07).
    (F) Amount relates to a favorable tax settlement recognized during the
        period related from our liquified natural gas discontinued business.
    (G) The weighted average common shares outstanding for the quarter and
        year ending September 30, 2005 excludes approximately 9 million and 8
        million shares, respectively, as those shares would be antidilutive
        due to the Company's net loss position.



    CABOT CORPORATION CERTAIN ITEMS - Exhibit I


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

    Certain items before income taxes

    Restructuring initiatives - Global      $(10)   $(0.10)   $-        $-
    Restructuring initiatives - Altona        (7)    (0.11)     (3)    (0.05)
    Cost reduction initiatives               -         -       (15)    (0.19)
    Goodwill asset impairment                -         -       -         -
    Long-lived asset impairment              -         -      (121)    (1.12)
    Gwalia settlement payment                -         -       -         -
    Impact of changes in shares for net
     loss (B)                                -         -       -       (0.13)

      Total certain items                    (17)    (0.21)   (139)    (1.49)

    Cumulative effect of accounting
     changes (C)                              (6)    (0.07)    -         -
    Discontinued Operations (D)                2      0.03     -         -
      Total certain items and cumulative
       effect of accounting changes          (21)    (0.25)   (139)    (1.49)

    Tax impact of certain items and
     cumulative effect of accounting
     changes (E)                               5       -        47       -

    Total certain items and cumulative
     effect of accounting change, after
     tax                                    $(16)   $(0.25)   $(92)   $(1.49)



    Periods ended September 30                       Twelve Months
    Dollars in millions, except per share
     amounts (unaudited)                    2006      2006     2005    2005
                                               $       per        $     per
                                                     share(A)         share(A)

    Certain items before income taxes

    Restructuring initiatives - Global      $(10)   $(0.10)    $-        $-
    Restructuring initiatives - Altona       (11)    (0.15)     (16)    (0.19)
    Cost reduction initiatives                (3)    (0.04)     (15)    (0.19)
    Goodwill asset impairment                -         -        (90)    (1.32)
    Long-lived asset impairment              -         -       (121)    (1.12)
    Gwalia settlement payment                (27)    (0.25)     -         -
    Impact of changes in shares for net
     loss (B)                                -         -        -       (0.13)

      Total certain items                    (51)    (0.54)    (242)    (2.95)

    Cumulative effect of accounting
     changes (C)                              (2)    (0.03)     -         -
    Discontinued Operations (D)                2      0.03      -         -
      Total certain items and cumulative
       effect of accounting changes          (51)    (0.54)    (242)    (2.95)

    Tax impact of certain items and
     cumulative effect of accounting
     changes (E)                              15       -         52      0.04

    Total certain items and cumulative
     effect of accounting change, after
     tax                                    $(36)   $(0.54)   $(190)   $(2.91)



    Periods ended September 30              Three Months     Twelve Months
    Dollars in millions (unaudited)         2006     2005    2006     2005

    Statement of Operations Line Item

    Net sales and other operating
     revenues                                 $-        -      $1        -
    Cost of sales                             (5)    $(14)    (35)    $(26)
    Selling and administrative expenses       (4)      (2)     (9)      (3)
    Research and technical service             -       (2)      -       (2)
    Goodwill asset impairment                  -        -       -      (90)
    Long-lived asset impairment                -     (121)      -     (121)
    Other                                     (8)       -      (8)       -
     Total certain items                    $(17)   $(139)   $(51)   $(242)



    (A) Per share amounts are calculated after tax for certain items that are
        taxable.
    (B) Due to the Company's net loss for the quarter and year ending
        September 30, 2005, common shares totaling 9 million for the quarter
        and 8 million for the year are required to be excluded from the
        calculation of diluted earnings per share, as including them would
        have an antidilutive effect.  However, in order to consistently
        present the per share impact of the certain items on the Company's
        results from period to period, the certain items are calculated using
        the Company's fully diluted weighted average common shares outstanding
        of 68 million.  The impact of this change in the weighted average
        common shares outstanding on both income from continuing operations
        and certain items is reflected in this line.
    (C) Cumulative expense of $(6) million resulting from adoption of FIN 47
        in the fourth quarter of 2006 and a benefit of $4 million resulting
        from adoption of FAS 123(R) in the first quarter of 2006.
    (D) Amount relates to a favorable tax settlement recognized during the
        period related from our liquified natural gas discontinued business.
    (E) Represents tax impact of certain items and cumulative effect of
        accounting change.

SOURCE Cabot Corporation 11/01/2006 CONTACT: Susannah R. Robinson, Director, Investor Relations, +1-617-342-6129 Web site: http://www.cabot-corp.com

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