UNITED STATES

                        SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C.  20549

                                    FORM 10-Q

               QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                          SECURITIES EXCHANGE ACT OF 1934


                    For the quarterly period ended June 30, 1999
                           Commission File Number 0-22572


                                  OM GROUP, INC.
              (exact name of registrant as specified in its charter)



               Delaware                                   52-1736882
     (state or other jurisdiction of                  (I.R.S., Employer
      incorporation or organization)                 Identification Number)


                                    Tower City
                                 50 Public Square
                                3800 Terminal Tower
                            Cleveland, Ohio  44113-2204
                     (Address of principal executive offices)
                                     (zip code)


                                  (216) 781-0083
               (Registrant's telephone number, including area code)



Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15 (d) of the Securities and Exchange Act of 1934
during the preceding 12 months (or for such shorter period that the registrant
was required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.  Yes _____X_____    No __________

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of June 30, 1999:  Common Stock, $.01 Par Value - 23,789,719
shares.










                                      INDEX

                                  OM GROUP, INC.




Part I.     Financial Information

Item 1.     Financial Statements (Unaudited)

            Condensed consolidated balance sheets -- June 30, 1999 and December
            31, 1998

            Condensed consolidated statements of income -- Three months ended
            June 30, 1999 and 1998;  Six months ended June 30, 1999 and 1998

            Condensed consolidated statements of cash flows -- Six months ended
            June 30, 1999 and 1998

            Notes to condensed consolidated financial statements -- June 30,
            1999

Item 2.     Management's Discussion and Analysis of Financial Condition and
            Results of Operations

Item 3.     Quantitative and Qualitative Disclosures about Market Risk

Part II.    Other Information

Item 1.     Legal Proceedings - Not applicable

Item 2.     Changes in Securities - Not applicable

Item 3.     Defaults upon Senior Securities - Not applicable

Item 4.     Submission of Matters to a Vote of Security Holders

Item 5.     Other information - Not applicable

Item 6.     Exhibits and Reports on Form 8-K
            (15)  Independent Accountants' Review Report
            (15)  Letter re:  Unaudited Interim Financial Information
            (27)  Financial Data Schedule














Part I    Financial Information
Item 1    Financial Statements



                                 OM GROUP, INC.
                     CONDENSED CONSOLIDATED BALANCE SHEETS
                   (Thousands of dollars, except share data)
                                  (Unaudited)

                                                     June 30,   December 31,
                                                      1999          1998
                                                   ---------     ---------
ASSETS

CURRENT ASSETS
   Cash and cash equivalents                         $  8,727    $  7,750
   Accounts receivable                                 87,470      80,906
   Inventories                                        362,212     283,264
   Other current assets                                30,612      48,321
                                                     --------    --------
     Total Current Assets                             489,021     420,241

PROPERTY, PLANT AND EQUIPMENT
   Land                                                 5,383       4,241
   Buildings and improvements                          81,347      80,148
   Machinery and equipment                            284,069     242,137
   Furniture and fixtures                              13,165      12,242
                                                     --------    --------
                                                      383,964     338,768
   Less accumulated depreciation                      102,996      93,423
                                                     --------    --------
                                                      280,968     245,345
OTHER ASSETS
   Goodwill and other intangible assets               186,338     188,486
   Other assets                                        14,578      16,647

                                                     --------    --------
TOTAL ASSETS                                         $970,905    $870,719
                                                     ========    ========



LIABILITIES AND STOCKHOLDERS' EQUITY

CURRENT LIABILITIES
   Current portion of long-term debt                 $     14    $    141
   Short-term debt                                                  2,000
   Accounts payable                                    87,139      76,412
   Other accrued expenses                              36,681      41,014
                                                     --------    --------
     Total Current Liabilities                        123,834     119,567

LONG-TERM LIABILITIES
   Long-term debt                                     384,181     309,964
   Deferred income taxes                               28,870      29,950
   Other long-term liabilities                          7,779       7,095

STOCKHOLDERS' EQUITY
   Preferred stock, $0.01 par value:
      Authorized 2,000,000 shares; no shares
      issued or outstanding
   Common stock, $0.01 par value:
      Authorized 60,000,000 shares;
      issued 23,959,346 shares                            240         240
   Capital in excess of par value                     258,085     258,085
   Retained earnings                                  175,300     155,691
   Treasury stock (169,627 shares in 1999
      and 234,847 shares in 1998, at cost)             (5,807)     (8,494)
   Accumulated other comprehensive income              (1,577)     (1,379)
                                                     --------    --------
      Total Stockholders' Equity                      426,241     404,143

                                                     --------    --------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY           $970,905    $870,719
                                                     ========    ========



See notes to condensed Consolidated Financial Statements



                                OM GROUP, INC.
                  CONDENSED CONSOLIDATED STATEMENTS OF INCOME
                 (Thousands of dollars, except per share data)
                                 (Unaudited)

                                   Three Months Ended       Six Months Ended
                                         June 30,              June 30,
                                  --------------------  ---------------------
                                    1999        1998       1999       1998
                                  --------    --------  --------    ---------

   Net sales                      $123,706   $139,154    $237,819    $277,252
   Cost of products sold            84,244    103,245     161,248     206,713
                                   -------    -------     -------     -------
                                    39,462     35,909      76,571      70,539

   Selling, general and
      administrative expenses       14,832     14,259      29,138      28,356
                                   -------    -------     -------     -------
   INCOME FROM OPERATIONS           24,630     21,650      47,433      42,183

OTHER INCOME (EXPENSE)
   Interest expense                 (4,772)    (4,380)     (9,222)     (8,359)
   Interest income                      55         72          70         180
   Foreign exchange gain (loss)        280        (60)        680         118
                                   -------     -------     -------     -------
                                    (4,437)    (4,368)     (8,472)     (8,061)
                                   -------     -------     -------     -------

   INCOME BEFORE INCOME TAXES       20,193     17,282      38,961      34,122

   Income taxes                      6,145      5,746      11,940      11,417

                                  --------   --------    --------    --------
   NET INCOME                     $ 14,048   $ 11,536    $ 27,021    $ 22,705
                                  ========   ========    ========    ========

Net income per common share          $0.59      $0.52       $1.14       $1.03
Net income per common share -
   assuming dilution                 $0.58      $0.51       $1.11       $1.00

Dividends paid per common share      $0.10      $0.09       $0.20       $0.18





See notes to condensed Consolidated Financial Statements



                                 OM GROUP, INC.
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                              (Thousands of dollars)
                                   (Unaudited)

                                                            Six Months Ended
                                                                 June 30,
                                                          -------------------
                                                             1999      1998
                                                          --------   --------
OPERATING ACTIVITIES
   Net income                                              $27,021    $22,705
   Items not affecting cash:
      Depreciation and amortization                         13,453     12,710
      Foreign exchange gain                                   (680)      (118)
      Deferred income taxes                                 (1,067)     4,042
   Changes in operating assets and liabilities             (57,631)   (31,063)
                                                           -------    -------
      NET CASH (USED IN) PROVIDED BY
        OPERATING ACTIVITIES                               (18,904)     8,276

INVESTING ACTIVITIES
   Expenditures for property, plant and equipment, net     (43,850)   (40,618)
   Acquisitions of businesses                               (2,650)  (106,543)
                                                           -------   ---------
     NET CASH USED IN INVESTING ACTIVITIES                 (46,500)  (147,161)

FINANCING ACTIVITIES
   Dividend payments                                        (4,749)    (3,973)
   Long-term borrowings                                     74,113    139,000
   Payments of long-term debt                                             (86)
   Payments of short-term debt                              (2,023)
   Purchase of treasury stock                               (1,864)    (2,415)
   Proceeds from exercise of stock options                   1,477        542
                                                           -------    -------
     NET CASH PROVIDED BY FINANCING ACTIVITIES              66,954    133,068

Effect of exchange rate changes on cash and
     cash equivalents                                         (573)      (634)

                                                           -------    -------
Increase (decrease) in cash and cash equivalents               977     (6,451)

Cash and cash equivalents at beginning of period             7,750     13,193
                                                           -------    -------
Cash and cash equivalents at end of period                 $ 8,727    $ 6,742
                                                           =======    =======

See notes to condensed Consolidated Financial Statements




                                 OM GROUP, INC.
          Notes to Condensed Consolidated Financial Statements (Unaudited)
                                 June 30, 1999
                 (Thousands of dollars, except per share amounts)

Note A      Basis of Presentation

            The accompanying unaudited condensed consolidated financial
            statements have been prepared in accordance with generally accepted
            accounting principles for interim financial information and with the
            instructions to Form 10-Q.  Accordingly, they do not include all of
            the information and footnotes required by generally accepted
            accounting principles for complete financial statements.  In the
            opinion of management, all adjustments (consisting of normal
            recurring accruals) considered necessary for a fair financial
            presentation have been included.  Past operating results are not
            necessarily indicative of the results which may occur in future
            periods.  For further information refer to the consolidated
            financial statements and notes thereto included in the Company's
            Annual Report on Form 10-K for the year ended December 31, 1998.

            In June, 1998, SFAS No. 133 "Accounting for Derivative Instruments
            and Hedging Activities" was issued.  SFAS No. 133 provides a
            comprehensive and consistent standard for the recognition and
            measurement of derivatives and hedging activities.  The Company must
            adopt SFAS No. 133 no later than the first quarter of fiscal year
            2001; adoption of this statement is not expected to have a material
            effect on earnings or the financial position of the Company.


Note B      Inventories

            Inventories consist of the following (in thousands):

                                                   June 30,    December 31,
                                                    1999           1998
                                                  --------       --------

            Raw materials and supplies            $162,448       $ 99,471
            Finished goods                         134,952        123,651
                                                  --------       --------
                                                   297,400        223,122
            LIFO reserve                            64,812         60,142
                                                  --------       --------
            Total inventories                     $362,212       $283,264
                                                  ========       ========


Note C      Contingent Matters

            The Company is a party to various legal proceedings incidental to
            its business and is subject to a variety of environmental and
            pollution control laws and regulations in the jurisdictions in which
            it operates.  As is the case with other companies in similar
            industries, the Company faces exposure from actual or potential
            claims and legal proceedings involving environmental matters.
            Although it is very difficult to quantify the potential impact of
            compliance with or liability under environmental protection laws,
            management believes that the ultimate aggregate cost to the Company
            of environmental remediation, as well as other legal proceedings
            arising out of operations in the normal course of business, will not
            result in a material adverse effect upon its financial condition or
            results of operations.

Note D      Computation of Earnings per Share

            The following table sets forth the computation of net income per
            common share and net income per common share - assuming dilution
            (shares in thousands):

                                         Three Months Ended     Six Months Ended
                                              June 30,               June 30,
                                         ------------------     ----------------
                                            1999     1998        1999      1998
                                         --------  --------     -------  -------

            Net income                     $14,048  $11,536     $27,021  $22,705
                                           =======  =======     =======  =======

            Weighted average number
              of shares outstanding         23,790   22,078      23,746   22,071

            Dilutive effect of
              stock options                    582      716         562      736
                                           -------  -------     -------  -------

            Weighted average number of
              shares outstanding
              - assuming dilution           24,372   22,794      24,308   22,807
                                           =======  =======     =======  =======

            Net income per common share       $.59     $.52       $1.14    $1.03
                                              ====     ====       =====    =====

            Net income per common share -
              assuming dilution               $.58     $.51       $1.11    $1.00
                                              ====     ====       =====    =====


Note E      Comprehensive Income

            The principal differences between net income as reported in the
            condensed consolidated statements of income and comprehensive income
            are foreign currency translation adjustments recorded in
            stockholders' equity.  Comprehensive income for the six months ended
            June 30, 1999 and 1998 was $26,823 and $22,564, respectively, and
            did not differ materially from net income.


Item 2      Management's Discussion and Analysis of Financial Condition and
            Results of Operations

            Results of Operations
            Three Months Ended June 30, 1999 Compared to Three Months Ended June
            30, 1998

            Net sales for the three months ended June 30, 1999 were $123.7
            million, a decrease of 11.1% compared to the same period for 1998.
            The decrease in sales resulted principally from lower cobalt
            and copper raw material prices.

            The following table summarizes market price fluctuations on the
            primary raw materials used by the Company in manufacturing its
            products:

                                           Market Price Ranges per Pound
                                             Three Months Ended June 30,
                                       --------------------------------------
                                             1999                  1998
                                       ----------------      ----------------

            Cobalt - 99.3% Grade       $13.55 to $20.00      $19.86 to $21.18
	      Nickel                     $ 2.19 to $ 2.49      $ 1.99 to $ 2.48
            Copper                     $  .62 to $  .72      $  .74 to $  .85

            The following table sets forth the pounds of carboxylates, salts and
            powders sold during each period:

                                        Three Months Ended June 30,   Percentage
            (in millions of pounds)            1999       1998          Change
                                               ----       ----          ------

            Carboxylates                       17.8       16.3           9.2%
            Salts                              24.2       22.4           8.0%
            Powders                            10.7       10.5           1.9%
                                               ----       ----           ----
                                               52.7       49.2           7.1%
                                               ====       ====           ====



            The increase in physical volume of carboxylate products sold was
            primarily due to increased sales of PVC plastic additives in the
            United States.  The increase in physical volume of salt products
            reflects higher sales of memory disk and battery grade chemicals in
            Asia Pacific, as well as strong sales of nickel carbonate to the
            United States steel industry.  The increase in physical volume of
            powders sold was primarily due to an increase in cobalt extra fine
            sales to the United States hard metal tool and diamond tool
            industries, and sales of coarse grade cobalt powder to the Asia
            Pacific rechargeable battery market.  Copper powder sales volumes
            were essentially equivalent to second quarter of 1998 levels.

            Gross profit increased to $39.5 million for the three month period
            ended June 30, 1999, a 9.9% increase over the same period in 1998.
            The improvement in gross profit was primarily the result of a
            combination of increased volumes, improved product mix and lower
            expenses.  Cost of products sold decreased to 68.1% for the three
            months ended June 30, 1999 from 74.2% of net sales during the same
            period of 1998 as a result of lower cobalt and copper pricing and
            improved product mix.

            Selling, general and administrative expenses increased by
            $.6 million in the three month period ended June 30, 1999 from the
            same period in 1998 resulting from general increases in
            administrative costs due to the Company's growth.  Due to the
            decline in net sales resulting from lower cobalt and copper prices,
            selling, general and administrative expenses increased to 12.0% of
            net sales for the second quarter of 1999 compared to 10.2% of net
            sales for the same period in 1998.

            Other expense - net in the second quarter of 1999 remained
            approximately the same as in 1998 at $4.4 million.  Increased
            interest expense in 1999 on higher outstanding borrowings resulting
            from provisional payments made on Zambia Consolidated Copper Mines
            Limited cobalt-copper concentrate and capital expenditures was
            partially offset by gains on foreign exchange.

            Income taxes as a percentage of income before income taxes decreased
            to 30.4% for the second quarter of 1999 from 33.2% in the same
            period in 1998.  The lower effective tax rate is due primarily to
            higher income earned in the relatively low statutory tax countries
            of Finland and Malaysia.

            Net income for the three month period ended June 30, 1999 was $14.0
            million, an increase of $2.5 million from the same period in 1998,
            due to the aforementioned factors.


            Six Months Ended June 30, 1999 Compared to Six Months Ended June 30,
            1998

            Net sales for the six months ended June 30, 1999 were $237.8
            million, a decrease of 14.2% compared to the same period for 1998.
            The decrease in sales resulted principally from lower cobalt,
            nickel, and copper raw material prices.

            The following table summarizes market price fluctuations on the
            primary raw materials used by the Company in manufacturing its
            products:

                                               Market Price Ranges per Pound
                                                 Six Months Ended June 30,
                                        ----------------------------------------
                                              1999                      1998
                                        ---------------         ----------------

            Cobalt - 99.3% Grade        $6.70 to $20.00         $18.10 to $21.18
            Nickel                      $1.81 to $ 2.49         $ 1.99 to $ 2.69
            Copper                      $ .61 to $  .72         $  .74 to $  .85

            The following table sets forth the pounds of carboxylates, salts and
            powders sold during each period:

                                         Six Months Ended June 30,    Percentage
             (in millions of pounds)      1999             1998           Change
                                         -----            -----          -------

             Carboxylates                 35.3             30.7           15.0%
             Salts                        48.0             44.2            8.6%
             Powders                      20.9             21.3           (1.9)%
                                         -----            -----           -----
                                         104.2             96.2            8.3%
                                         =====            =====           =====

             The increase in physical volume of carboxylate products sold was
             primarily due to increased sales of PVC plastic additives in the
             United States.  The increase in physical volume of salt products
             reflects higher sales of memory disk and battery grade chemicals in
             Asia Pacific, as well as strong sales of nickel carbonate to the
             United States steel industry.  The decrease in physical volume of
             powders sold was due to first quarter softness in copper powder
             products, partially offset by increases in sales of cobalt extra
             fine and tungsten powders to the hard metal tool and diamond tool
             industries.


             Gross profit increased to $76.6 million for the six month period
             ended June 30, 1999, an 8.6% increase over the same period in 1998.
             The improvement in gross profit was primarily the result of a
             combination of increased volumes, improved product mix and lower
             expenses.  Cost of products sold decreased to 67.8% for the six
             months ended June 30, 1999 from 74.6% of net sales during the same
             period of 1998 as a result of lower cobalt, nickel and copper
             pricing and improved product mix.

             Selling, general and administrative expenses increased by
             $.8 million in the six month period ended June 30, 1999 from the
             same period in 1998 resulting from general increases in
             administrative costs due to the Company's growth.  Due to the
             decline in net sales resulting from lower cobalt, nickel, and
             copper prices, selling, general and administrative expenses
             increased to 12.3% of net sales for the first six months of 1999
             compared to 10.2% of net sales for the same period in 1998.

             Other expense - net in 1999 was $8.5 million compared to $8.1
             million in 1998, due primarily to increased interest expense on
             higher outstanding borrowings as a result of provisional payments
             made on Zambia Consolidated Copper Mines Limited cobalt-copper
             concentrate and capital expenditures, partially offset by gains on
             foreign exchange.

             Income taxes as a percentage of income before income taxes
             decreased to 30.6% for the first six months of 1999 from 33.5% in
             the same period in 1998.  The lower effective tax rate is due
             primarily to higher income earned in the relatively low statutory
             tax countries Finland and Malaysia.

             Net income for the six month period ended June 30, 1999 was $27.0
             million, an increase of $4.3 million from the same period in 1998,
             due to the aforementioned factors.


             Liquidity and Capital Resources

             During the six month period ended June 30, 1999, the Company's net
             working capital increased by approximately $65 million, compared to
             December 31, 1998.  This increase was primarily the result of
             provisional payments made on Zambia Consolidated Copper Mines
             Limited cobalt-copper concentrate which were funded primarily
             through additional bank borrowings.  Capital expenditures increased
             in 1999, primarily due to the completion of the Company's solvent
             extraction unit in Kokkola, Finland and the continuing smelter
             construction project in Lumbumbashi, Democratic Republic of Congo.
             These capital expenditures were funded through cash generated by
             operations as well as additional borrowings under the Company's
             revolving credit facility.

             In January, 1999, the Company's revolving credit facility was
             revised to increase available credit to $325 million to finance the
             purchase of cobalt-copper concentrate, and to expand its sources of
             capital by adding three new institutions.


             The Company believes that it will have sufficient cash generated by
             operations and through its credit facilities to provide for its
             future working capital and capital expenditure requirements and to
             pay quarterly dividends on its common stock, subject to the Board's
             discretion.  Subject to several limitations in its credit
             facilities, the Company may incur additional borrowings under this
             line to finance working capital and certain capital expenditures,
             including, without limitation, the purchase of additional raw
             materials.

             Year 2000

             Based on ongoing reviews of the Company's systems, the Company
             presently believes that with modifications to existing computer
             software and conversions to new software, the Year 2000 Issue will
             not pose significant operational problems to its normal business
             activities.

             The Company's plan to resolve the Year 2000 Issue involves the
             following four phases:  assessment, remediation, testing and
             implementation.  The following table summarizes the Company's
             progress on these Year 2000 phases, with respect to: 1) the nature
             and potential effects of the Year 2000 on information (IT) and non-
             IT systems;  2) the status of the Company's progress in becoming
             Year 2000 ready for both IT and non-IT systems, including estimated
             timetable for completion of each phase;  and 3) third parties and
             their exposure to the Year 2000.

             Exposure Type                           Resolution Phases
             ----------------------     ----------------------------------------
                                        Assess     Remedi-              Imple-
                                        -ment       ation    Testing   mentation
                                       --------   --------   --------  ---------
             INFORMATION SYSTEMS
             ------------------------

             % Complete at 6/30/99          90%       85%       80%       75%
             Expected Completion Date    Aug 1999  Sep 1999  Sep 1999  Oct 1999

             NON-INFORMATION SYSTEMS
             ------------------------

             Production and
             Manufacturing Systems
               % Complete at 6/30/99       100%       90%       80%       75%
               Expected Completion Date  Sep 1998  Aug 1999  Aug 1999  Sep 1999

             Products
               % Complete at 6/30/99        100%      N/A        N/A       N/A
               Expected Completion Date  Sep 1998


             THIRD PARTIES
             ------------------------

             System Interface
               % Complete at 6/30/99       100%       N/A        N/A       N/A
               Expected Completion Date   Apr 1999

             Other Material Exposures
               % Complete at 6/30/99       100%       N/A        N/A       N/A
               Expected Completion Date   Sep 1998

             This project will be completed using a combination of existing
             internal and external resources.  The total cost of the Year 2000
             project is estimated at $2.5 million and is being funded through
             operating cash flows.  As of June 30, 1999, approximately $1.5
             million has been incurred.  Of the total project cost,
             approximately $.8 million is attributable to a new software
             purchase, which has been capitalized.  The remaining $1.7 million,
             which is being expensed as incurred, is not expected to have a
             material effect on the results of operations of the Company.

             Management of the Company believes it has an effective program in
             place to resolve the Year 2000 issue in a timely manner.  As noted
             above, the Company has not yet completed all necessary phases of
             the Year 2000 program.  Disruptions in the economy generally
             resulting from Year 2000 issues could also materially adversely
             affect the Company.  The amount of potential liability and lost
             revenue cannot be reasonably estimated at this time.

             The Company does not believe that lack of completion of all phases
             of the Year 2000 program by December 31, 1999 would materially
             disrupt its operations, based on an evaluation of the status of the
             program in April, 1999, and has determined that a contingency plan
             is not necessary.


             Euro Conversion

             The Company has converted and/or installed the necessary software
             modifications and is successfully operating in the post-euro
             conversion European economy since the introduction of the euro
             currency on January 1, 1999.


             Forward Looking Statements

             The Company is making this statement in order to satisfy the "safe
             harbor" provisions contained in the Private Securities Litigation
             Reform Act of 1995.  The foregoing discussion includes forward-
             looking statements relating to the business of the Company.  Such
             forward-looking statements are subject to uncertainties and factors
             relating to the Company's operations and business environment, all
             of which are difficult to predict and many of which are beyond the


             control of the Company, that could cause actual results of the
             Company to differ materially from those matters expressed in or
             implied by such forward-looking statements.  The Company believes
             that the following factors, among others, could affect its future
             performance and cause actual results of the Company to differ
             materially from those expressed in or implied by forward-looking
             statements made by or on behalf of the Company:  (a) the price and
             supply of raw materials, particularly cobalt, copper and nickel;
             (b) demand for metal-based specialty chemicals in the mature
             markets in the United States and Europe;  (c) demand for metal-
             based specialty chemicals in Asia-Pacific and other less mature
             markets; (d) the effect of non-currency risks of investing in and
             conducting operations in foreign countries, together with
             fluctuations in currency exchange rates upon the Company's
             international operations, including those relating to political,
             social, economic and regulatory factors;  and (e) the Company's
             ability and its customers' and suppliers' ability to replace,
             modify or upgrade computer programs in ways that adequately address
             the Year 2000 Issue.


Item 3       Quantitative and Qualitative Disclosures About Market Risk

             A discussion of market risk exposures is included in Part II, Item
             7a, "Qualitative and Quantitative Disclosure About Market Risk", of
             the Company's 1998 Annual Report on Form 10-K.  There have been no
             material changes during the six months ended June 30, 1999.

Item 4       Submission of Matters to a Vote of Security Holders

             The annual meeting of stockholders of OM Group, Inc. was held on
             May 4, 1999.  An election of Directors was held at which Lee R.
             Brodeur, Thomas R. Miklich and James P. Mooney were nominated and
             elected for terms which expire in the year 2002.  The following
             votes were cast with respect to each of the nominees:

             Director                      For          Against       Abstain
             ----------------           ----------      -------       -------

             Lee R. Brodeur             16,749,086      118,498          0
             Thomas R. Miklich          16,749,311      118,273          0
             James P. Mooney            16,704,149      163,435          0

             Other directors whose terms of office will continue after the
             meeting are:

                                            Term of
             Director                   Office Expires
             ---------------            --------------

             Eugene Bak                      2001
             Frank E. Butler                 2001
             John E. Mooney                  2000
             Markku Toivanen                 2000



             Ernst & Young LLP was re-elected as independent auditors:
             For - 16,855,078, against - 4,286, abstain - 8,220.


Part II      Other Information
Item 6       Exhibits and Reports on Form 8-K

             The following exhibits are included herein:

             Exhibit (15) Independent Accountants' Review Report
             Exhibit (15) Letter re:  Unaudited Interim Financial Information
             Exhibit (27) Financial Data Schedule

             There were no reports on Form 8-K filed during the three months
             ended June 30, 1999.



                                  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 thereunto duly authorized.


August 10, 1999                    OM GROUP, INC.





                                   James M. Materna
                                   Chief Financial Officer
                                   (Duly authorized signatory of OM Group, Inc.)



                   Independent Accountants' Review Report





Stockholders and Board of Directors
OM Group, Inc.

We have reviewed the accompanying condensed consolidated balance sheet of OM
Group, Inc. as of June 30, 1999, and the related condensed consolidated
statements of income for the three-month and six-month periods ended June 30,
1999 and 1998, and the condensed consolidated statements of cash flows for the
six-month periods ended June 30, 1999 and 1998.  These financial statements are
the responsibility of the Company's management.

We conducted our reviews in accordance with standards established by the
American Institute of Certified Public Accountants.  A review of interim
financial information consists principally of applying analytical procedures to
financial data, and making inquiries of persons responsible for financial and
accounting matters.  It is substantially less in scope than an audit conducted
in accordance with generally accepted auditing standards, which will be
performed for the full year with the objective of expressing an opinion
regarding the financial statements taken as a whole.  Accordingly, we do not
express such an opinion.

Based on our reviews, we are not aware of any material modifications that should
be made to the accompanying condensed consolidated financial statements referred
to above for them to be in conformity with generally accepted accounting
principles.

We have previously audited, in accordance with generally accepted auditing
standards, the consolidated balance  sheet of OM Group, Inc. as of December 31,
1998, and the related consolidated statements of income, stockholders' equity,
and cash flows for the year then ended, not presented herein, and in our report
dated February 12, 1999, we expressed an unqualified opinion on those
consolidated financial statements.  In our opinion, the information set forth in
the accompanying condensed consolidated balance sheet as of December 31, 1998,
is fairly stated, in all material respects, in relation to the consolidated
balance sheet from which it has been derived.




                                                           /s/ Ernst & Young LLP
                                                           ---------------------
                                                           Ernst & Young LLP

Cleveland, Ohio
August 9, 1999



                    Acknowledgment of Independent Accountants





Stockholders and Board of Directors
OM Group, Inc.

We are aware of the incorporation by reference in the following Registration
Statements of OM Group, Inc. of our reports dated May 6 and August 9, 1999,
relating to the unaudited condensed consolidated interim financial statements of
OM Group, Inc. which are included in its Form 10-Q for the quarters ended March
31, 1999 and June 30, 1999.

Registration
Number       Description                                        Filing Date
- ---------    -----------------------------------------------    ----------------

33-74674     OM Group, Inc. Long-Term Incentive Compensation
             Plan - Form S-8 Registration Statement -
             1,015,625 Shares                                   January 27, 1994

333-07529    OMG Americas, Inc. Employees' Profit
             Sharing Plan -- Form S-8 Registration
             Statement -- 250,000 Shares                        July 3, 1996

333-07531    OM Group, Inc. Non-Employees Directors'
             Equity Plan -- Form S-8 Registration
             Statement -- 250,000 Shares                        July 3, 1996



Pursuant to Rule 436(c) of the Securities Act of 1933 our reports are not a part
of the registration statements prepared or certified by accountants within the
meaning of Section 7 or 11 of the Securities Act of 1933.


                                                           /s/ Ernst & Young LLP
                                                           ---------------------
                                                           Ernst & Young LLP


Cleveland, Ohio
August 9, 1999