MOBIL CORP
11-K, 1999-05-12
PETROLEUM REFINING
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                              SEC File No 33-18130







                         SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 20549-1004




                                      FORM 11-K


                                    ANNUAL REPORT


                          Pursuant to Section 15(d) of the
                          Securities Exchange Act of 1934


                     For the fiscal year ended January 31, 1999


                              EMPLOYEES SAVINGS PLAN OF
                                MOBIL OIL CORPORATION

                               (Full title of the plan)



                                  MOBIL CORPORATION
                        3225 Gallows Road, Fairfax, Virginia
                                     22037-0001
                              Telephone:  (703) 846-3000


            (Name of issuer of the securities held pursuant to the plan and
                      the address of its principal executive office)

                                      13-2850309

                           (IRS Employer Identification No.)


<PAGE>


           EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                             FORM 11-K
                     FOR THE FISCAL YEARS ENDED
                     JANUARY 31, 1998 and 1999



                         TABLE OF CONTENTS



                                                                     Page

Report of Ernst & Young LLP, Independent Auditors..................    1
Statements of Net Assets Available for Benefits....................    2-3
Statements of Changes in Net Assets Available for Benefits.........    4-5
Notes to Plan Financial Statements.................................    6
Supplemental Information:
  Schedule of Assets Held for Investment Purposes..................   13
  Schedule of Reportable Transactions..............................   14
Signature..........................................................   15
Exhibit Index......................................................   16
Exhibit 23 - Consent of Ernst & Young LLP, Independent Auditors....   17


A schedule of  party-in-interest  transactions  has not been  presented  because
there were no such prohibited transactions.


<PAGE>





                            REPORT OF INDEPENDENT AUDITORS





Board of Directors
Mobil Oil Corporation


We have audited the accompanying statements of net assets available for benefits
of the Employees  Savings Plan of Mobil Oil Corporation (the Plan) as of January
31, 1998 and 1999, and the related statements of changes in net assets available
for  benefits  for the years then  ended.  These  financial  statements  are the
responsibility  of the Plan's  management.  Our  responsibility is to express an
opinion on these financial statements based on our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all  material  respects,  the net assets  available  for benefits of the Plan at
January  31,  1998 and 1999,  and the  changes in its net assets  available  for
benefits  for the years  then  ended,  in  conformity  with  generally  accepted
accounting principles.

Our audits were performed for the purpose of forming an opinion on the financial
statements taken as a whole. The accompanying  supplemental  schedules of assets
held for investment purposes as of January 31, 1999 and reportable  transactions
for the year the ended, are presented for the purpose of additional analysis and
are  not a  required  part of the  financial  statements  but are  supplementary
information  required by the  Department  of Labor's Rules and  Regulations  for
Reporting and Disclosure  under the Employee  Retirement  Income Security Act of
1974.  These  supplemental  schedules  are  the  responsibility  of  the  Plan's
management.  The Fund  Information in the statement of net assets  available for
benefits and the  statement of changes in net assets  available  for benefits is
presented  for purposes of  additional  analysis  rather than to present the net
assets  available  for  benefits  and the  changes in net assets  available  for
benefits of each fund. The supplemental schedules and fund information have been
subjected  to  auditing  procedures  applied  in our  audits  of  the  financial
statements  and, in our opinion,  are fairly stated in all material  respects in
relation to the financial statements taken as a whole.








Fairfax, Virginia                                   Ernst & Young LLP
April 16, 1999
                                       1

<PAGE>

<TABLE>
<CAPTION>





                          EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                          STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
                                         JANUARY 31, 1998
                                       (millions of dollars)
<S>                         <C>     <C>        <C>      <C>       <C>    <C>     <C>      <C>   
                                    MOBIL      LONG-
                            MOBIL   ESOP       TERM               OTHER  OTHER   PARTIC-
                            COMMON  PREFERRED  FIXED    JENNISON  LOWER  HIGHER  IPANT
                            STOCK   STOCK      INCOME   EQUITY    RISK   RISK    LOAN
                            FUND    FUND       FUND     FUND      FUNDS  FUNDS   FUND     TOTAL
                          ----------------------------------------------------------------------
Investments, at
  current value           $2,093    $1,168     $699     $856      $429   $220    $82      $5,547
Contributions receivable:
  Company                      1       171        -        -         -      -      -         172
  Participants                 3         -        1        1         1      1      -           7
Dividends and interest
  receivable                   -        21        -        -         -      -      1          22
Loan repayments
  receivable                   -         -        -        -         -      -      2           2
Cash                           -         -        -        -         5      -      -           5
                          ----------------------------------------------------------------------
      Total assets         2,097     1,360      700      857       435    221     85       5,755
                          ----------------------------------------------------------------------
Accrued interest
  payable                      -       (17)       -        -         -      -      -         (17)
ESOP debt                      -      (497)       -        -         -      -      -        (497)
                          ----------------------------------------------------------------------
     Total liabilities         -      (514)       -        -         -      -      -        (514)
                          ----------------------------------------------------------------------
     Net assets available
       for benefits       $2,097    $  846     $700     $857      $435   $221    $85      $5,241
                          ======================================================================












                                              See accompanying notes
</TABLE>
                                                        2

<PAGE>



<TABLE>
<CAPTION>



                          EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                          STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
                                         JANUARY 31, 1999
                                       (millions of dollars)
<S>                         <C>     <C>        <C>      <C>       <C>    <C>     <C>      <C>
                                    MOBIL      LONG-
                            MOBIL   ESOP       TERM               OTHER  OTHER   PARTIC-
                            COMMON  PREFERRED  FIXED    JENNISON  LOWER  HIGHER  IPANT
                            STOCK   STOCK      INCOME   EQUITY    RISK   RISK    LOAN
                            FUND    FUND       FUND     FUND      FUNDS  FUNDS   FUND     TOTAL
                          ----------------------------------------------------------------------
Investments, at
  current value           $2,458    $1,438     $779     $1,221    $545   $233    $74      $6,748
Contributions receivable:
  Company                              181        -          -       -      -      -         181
  Participants                 3         -        1          1       1      1      -           7
Dividends and interest
  receivable                   -        20        -          -       -      -      1          21
Loan repayments
  receivable                   -         -        -          -       -      -      2           2
Cash                           -         -        -          -       6      -      -           6
                          ----------------------------------------------------------------------
      Total assets         2,461     1,639      780      1,222     552    234     77       6,965
                          ----------------------------------------------------------------------
Accrued interest
  payable                      -       (15)       -          -       -      -      -         (15)
ESOP debt                      -      (471)       -          -       -      -      -        (471)
                          ----------------------------------------------------------------------
     Total liabilities         -      (486)       -          -       -      -      -        (486)
                          ----------------------------------------------------------------------
     Net assets available
       for benefits       $2,461    $1,153     $780     $1,222    $552   $234    $77      $6,479
                          ======================================================================












                                              See accompanying notes
</TABLE>
                                                          3

<PAGE>


<TABLE>
<CAPTION>




                          EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                     STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
                                    YEAR ENDED JANUARY 31, 1998
                                       (millions of dollars)
<S>                         <C>     <C>        <C>                <C>    <C>     <C>     <C>
                                    MOBIL      LONG-
                            MOBIL   ESOP       TERM               OTHER  OTHER   PARTIC-
                            COMMON  PREFERRED  FIXED    JENNISON  LOWER  HIGHER  IPANT
                            STOCK   STOCK      INCOME   EQUITY    RISK   RISK    LOAN
                            FUND    FUND       FUND     FUND      FUNDS  FUNDS   FUND    TOTAL
                          ---------------------------------------------------------------------
Contributions
  Company                 $   17      $ 29     $  -     $  -      $  -   $  -    $ -     $   46
  Participants                34         -        9       18        11      9      -         81

Investment income
  Dividends                   64        52        -        -        28     11      -        155
  Interest and other
    investment income          -         -       47        -         -      -      7         54
  Realized and unrealized
    gains on investments      90        51        -      194        21      -      -        356
                          ---------------------------------------------------------------------
  Total investment income    154       103       47      194        49     11      7        565
                          ---------------------------------------------------------------------
Interest on ESOP debt          -       (43)       -        -         -      -      -        (43)
Distributions to
  participants              (154)      (24)    (130)     (47)      (45)   (13)    (4)      (417)
Transfers in (Note 5)          3         -        5        2         3      1      -         14
Transfers out                  -         -        -        -         -      -      -          -
Inter-fund transfers          63       (11)     (34)     (22)        1     11     (8)         -
                          ---------------------------------------------------------------------
  Net increase in net
    assets available
    for benefits             117        54     (103)     145        19     19     (5)       246

Net assets available for benefits:
  At beginning of year     1,980       792      803      712       416    202     90      4,995
                          ---------------------------------------------------------------------
  At end of year          $2,097      $846     $700     $857      $435   $221    $85     $5,241
                          =====================================================================




                                              See accompanying notes
</TABLE>
                                                       4

<PAGE>



<TABLE>
<CAPTION>



                          EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                     STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
                                    YEAR ENDED JANUARY 31, 1999
                                       (millions of dollars)
<S>                         <C>     <C>        <C>      <C>       <C>    <C>     <C>      <C>
                                    MOBIL      LONG-
                            MOBIL   ESOP       TERM               OTHER  OTHER   PARTIC-
                            COMMON  PREFERRED  FIXED    JENNISON  LOWER  HIGHER  IPANT
                            STOCK   STOCK      INCOME   EQUITY    RISK   RISK    LOAN
                            FUND    FUND       FUND     FUND      FUNDS  FUNDS   FUND     TOTAL
                            --------------------------------------------------------------------
Contributions
  Company                 $   17      $ 26     $  -     $    -    $  -   $  -    $ -      $   43
  Participants                37         -       11         21      14     10      -          93

Investment income
  Dividends                   67        50        -          -      24      8      -         149
  Interest and other
    investment income          -         -       46          -       -      -      6          52
  Realized and unrealized
    gains on investments     567       318        -        415      43     19      -       1,362
                          ----------------------------------------------------------------------
  Total investment income    634       368       46        415      67     27      6       1,563
                          ----------------------------------------------------------------------
Interest on ESOP debt          -       (38)       -          -       -      -      -         (38)
Distributions to
  participants              (167)      (31)    (141)       (51)    (42)   (10)    (4)       (446)
Transfers in (Note 5)          3         -       12          6       7      1      -          29
Transfers out (Note 5)        (2)       (2)      (1)         -      (1)     -      -          (6)
Inter-fund transfers        (158)      (16)     153        (26)     72    (15)   (10)          -
                          ----------------------------------------------------------------------
  Net increase in net
    assets available
    for benefits             364       307       80        365     117     13     (8)      1,238

Net assets available for benefits:
  At beginning of year     2,097       846      700        857     435    221     85       5,241
                          ----------------------------------------------------------------------
  At end of year          $2,461    $1,153     $780     $1,222    $552   $234    $77      $6,479
                          ======================================================================




                                              See accompanying notes
</TABLE>
                                                       5

<PAGE>


              EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                     NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1998 and 1999


Note 1.  Description of the Plan

Eligibility  -  Through  December  31,  1997,  regular  employees  of Mobil  Oil
Corporation and its participating  affiliates  (Mobil) generally became eligible
to participate in the Employees Savings Plan of Mobil Oil Corporation (the Plan)
on the first of the month after  completion  of one year of  service.  Effective
January 1, 1998, most employees are  immediately  eligible to participate in the
Plan.  Films  division  employees  hired  after  April 1,  1998 or later  become
eligible to participate  in the Plan on the first of the month after  completing
one year of service.

During  1998,  Mobil  sold  certain  operations  in  Paulsboro,  New  Jersey and
Pasadena, Texas. The Plan provided full vesting to all affected participants and
allowed  them to continue to repay their  outstanding  loans under the  existing
loan amortization schedules.

Contributions - The Plan is composed of two parts:

Savings Account - Through December 31, 1998, Mobil contributed  sufficient funds
to this account to provide an  allocation of Mobil's  Series B ESOP  Convertible
Preferred  Stock (Mobil ESOP  Convertible  Preferred  Stock) equal to 4% of most
employees'  eligible  compensation,   plus  additional  Mobil  ESOP  Convertible
Preferred Stock in lieu of preferred cash dividends on such stock.  Effective on
January 1, 1999,  Mobil's  contribution  was increased to 6% for most employees.
Employees can make after-tax  contributions  to the Savings Account of the Plan,
subject  to  certain  tax  law  limitations.   The  maximum  permitted  employee
contribution  to the  Savings  Account  is 15% of  eligible  compensation  (plus
certain make-up contributions).

401(k)  Account - Through  December 31, 1998,  Mobil  contributed 2% of eligible
compensation  for most  employees to this  account(and an additional 1% for most
pre-January 1, 1969 employees).  An employee could elect to receive a portion or
all of Mobil's  contributions  in cash.  Effective  on January 1, 1999,  this 2%
contribution  was  discontinued.  The account  also  includes  employee  pre-tax
contributions.  The combined  Mobil and employee  contributions  to this account
cannot exceed 15% of the employee's eligible  compensation.  Federal regulations
governing  the 401(k)  Account  limit in certain  cases the  combined  Mobil and
employee 401(k) contributions to less than 15% of eligible compensation.

Vesting & other - Mobil's  contributions  to the  Savings  Account  and  related
investment  income  become vested upon  completion of five years of  employment.
Mobil's  contributions to the 401(k) account and all employee  contributions and
related earnings are immediately vested.

Effective  January 1, 1999,  participants  have the option to receive  dividends
from Mobil Common Stock in the Plan in cash without withdrawal penalties.

The terms of the Plan are more fully described in the Summary Plan  Description,
which is available to each participant.

In December 1998, Mobil and Exxon  Corporation  signed an agreement to merge the
two companies, subject to regulatory and shareholder approvals.

Note 2.  Administration of Plan Assets

The Plan is  administered by Mobil Oil  Corporation  acting through  fiduciaries
designated by its Board of Directors to serve at its discretion.  Merrill Lynch,
Pierce,  Fenner and Smith Inc. is the record-keeper for the Plan.  Merrill Lynch
Trust  Company  (Merrill  Lynch) is the trustee,  with the exception of the ESOP
portion of the Plan, of which Bankers Trust Company is the trustee.

                                      6
<PAGE>




               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1998 and 1999


Note 3.  Major Accounting Policies

Security  valuation - Mobil Common Stock is valued at the Plan's  average  sales
price  for the  day  (based  on the  New  York  Stock  Exchange),  on the day of
valuation or, lacking any sales on that day, at the most recent bid quotation.

Mobil's ESOP  Convertible  Preferred Stock units (1/100th of a preferred  share)
are stated at current  value,  which is the higher of the  liquidation  value or
current  market  value.  Liquidation  value is the minimum  price  guaranteed by
Mobil,  $38.875 per unit.  Current  market value is defined as the average sales
price for Mobil Common Stock as defined in the previous paragraph.

The Merrill Lynch Floating Rate Long-Term  Fixed Income Fund (LTFI) is stated at
current value,  which  approximates fair value,  representing the original cost,
plus  interest  (based upon the  crediting  rates of the  underlying  contracts)
reduced by transfers out and withdrawals.

The Aim Charter Fund,  the Merrill  Lynch Global  Allocation  Fund,  the Merrill
Lynch Institutional Fund, the Franklin U.S. Government  Securities Fund, the MFS
Emerging  Growth Fund, the Templeton  Foreign Fund and the Templeton  Developing
Markets  Trust are  publicly  traded and valued at the closing sale price of the
last business day of the Plan year.

The Jennison Fund and the Merrill Lynch Equity Index Trust are stated at current
value, which approximates the fair value of the funds' underlying securities and
encompass dividends,  interest,  gains and losses and administration fees in the
values of each unit.

Participant loans represent the outstanding  principal balances of the loans and
are valued at cost, which approximates current value.

Additional  descriptions of the investment  choices in the Plan are available to
the participants from Merrill Lynch.

Investment  income -  Dividends  from  Mobil  Common  Stock are  accrued  on the
ex-dividend date.

The minimum annual dividend on a unit of Mobil ESOP Convertible  Preferred Stock
accrues  on a monthly  basis,  and is set at $3.00 per  year.  If the  aggregate
declared  dividends on a share of Mobil Common Stock for the six months before a
semi-annual dividend on the Mobil ESOP Convertible  Preferred Stock exceed $3.00
per share,  the  semi-annual  dividend  on a unit of the Mobil ESOP  Convertible
Preferred Stock will be at least the same as such aggregate dividends on a share
of Mobil Common Stock.

All other  earnings are stated on an accrual basis.  Investment  income from all
sources is stated net of investment  management,  trustee, audit and other third
party  fees of  approximately  $2,782,000  and  $3,317,000  for the years  ended
January 31, 1998 and 1999, respectively.

Security  transactions  are  recorded  on  a  trade  date  basis.  Realized  and
unrealized gains and losses are based on an average cost method.

                                         7

<PAGE>


               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1998 and 1999


Note 3.  Major Accounting Policies - continued

Forfeitures - Amounts forfeited  (non-vested Mobil contributions and accumulated
earnings  thereon)  under  the  Plan  are used to  reduce  Mobil  contributions.
Unapplied  forfeitures  at January 31 are  accounted  for as reductions in Mobil
contributions.

Use of estimates - The  preparation  of the  financial  statements in accordance
with generally  accepted  accounting  principles  requires Mobil to make certain
estimates and assumptions affecting amounts in the financial statements.  Actual
results could differ from these estimates and assumptions.

Note 4.  Employee Stock Ownership Plan (ESOP)

In November  1989,  the ESOP trust,  supported by a Mobil  guarantee,  privately
placed  $800,000,000 of floating  interest rate notes due November 22, 2004, and
used the proceeds to purchase 205,788 shares of Mobil ESOP Convertible Preferred
Stock at a price equal to liquidation  value, or $3,887.50 per share. Each share
is  convertible  into 100 shares of Mobil  Common  Stock and is  entitled to 100
votes.

On February 27, 1990, the ESOP trust issued and Mobil guaranteed $800 million of
9.17% Sinking Fund Debentures due February 29, 2000,  pursuant to Rule 415 under
the  Securities  Act of 1933.  The ESOP  trust used the  proceeds  to retire the
floating  interest  rate notes due November  22,  2004.  As of January 31, 1999,
$196.2 million of these debentures were still outstanding.

Through  January  31,  1999,  the ESOP  trust  issued  and Mobil  guaranteed  an
aggregate  of $275  million of  medium-term  notes  under a $300  million  shelf
registration filed with the Securities and Exchange  Commission pursuant to Rule
415.  On March  12,  1999,  the  Securities  and  Exchange  Commission  declared
effective a new shelf  registration  that would permit the offer and sale by the
ESOP trust of an  additional  $475  million in debt  securities,  guaranteed  by
Mobil,  pursuant to Rule 415. The proceeds of the sales of the issued notes were
used to retire identical principal amounts of existing debt, and the proceeds of
the issue and sale of any other  debt  securities  issued and sold under the new
shelf  registration  would  be used  for the  same  purpose.  Interest  on these
medium-term notes is due semi-annually.  A summary of these medium-term notes as
of January 31, 1999 is as follows:

     Date of                      Interest      Maturity
     Issuance        Amount         Rate          Date
     --------     ------------    --------      --------

     2/28/94      $ 25,000,000     6.220%        2/28/02
     8/31/94        15,000,000     7.550%        2/28/02
     2/28/95        30,000,000     8.225%        8/31/04
     8/31/96        25,000,000     6.700%        8/31/00
     8/31/96        15,000,000     6.625%        2/28/01
     2/28/97        25,000,000     6.250%        8/31/01
     2/28/97        10,000,000     6.300%        9/03/02
     9/02/97        40,000,000     6.375%        8/31/01
     3/02/98        25,000,000     5.875%        9/03/02
     3/02/98        20,000,000     5.900%        2/28/03
     8/31/98        45,000,000     5.800%        9/02/03
                  ------------
                  $275,000,000
                  ============


                                       8
<PAGE>


               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1998 and 1999


Note 4.  Employee Stock Ownership Plan (ESOP) - continued

Principal and interest  payments on the debentures and medium term notes are due
semi-annually.  Plan  fiscal year annual  principal  maturities  are as follows:
$135,600,000 in 2000;  $85,600,000 in 2001;  $80,000,000 in 2002; $75,000,000 in
2003; and $95,000,000 in 2004.

On February 4, 1999, the ESOP trust established a commercial paper program under
which the ESOP trust may sell to  institutional  investors up to $500 million of
short-term  notes,  guaranteed by Mobil. The proceeds of the sales of such notes
will be used for the same purposes as the proceeds of the debt securities issued
by the ESOP  trust and  guaranteed  by Mobil  under the  above  mentioned  shelf
registrations.  On March 1,  1999,  the ESOP trust  issued and Mobil  guaranteed
$115,090,808  of 4.973%  notes,  due August 31, 1999.  The proceeds were used in
part to  retire in  advance  of their  normal  maturity  dates  the first  three
medium-term notes identified in the above schedule.

Only  unallocated  assets  held in the ESOP  trust are  subject to  recourse  by
creditors of the ESOP trust.

The ESOP trust uses  dividends on the Mobil ESOP  Convertible  Preferred  Stock,
together with  contributions  from Mobil, to repay the principal and interest on
the ESOP debt.  The  amount of ESOP debt  repaid  each Plan year  results in the
release of shares of Mobil ESOP Convertible  Preferred Stock to be available for
allocation  to Plan  participants'  accounts.  Mobil  contributes  semi-annually
sufficient  funds to ensure that each  participant's  account is  credited  with
Mobil ESOP Convertible Preferred Stock as discussed in Note 1.

Plan  participants  earned  623,668  and 630,678  pay-based  units of Mobil ESOP
Convertible  Preferred Stock,  plus credit for fractional  units, for the fiscal
years ended January 31, 1998 and 1999,  respectively.  The aggregate fair values
of these units were  $43,921,110  in 1998 and  $49,186,368 in 1999. In addition,
Plan participants earn units of Mobil ESOP Convertible  Preferred Stock equal to
the value of the preferred dividends on units allocated to participant accounts.
The units of Mobil ESOP  Convertible  Preferred  Stock earned by dividends  were
354,055 with a fair value of  $25,109,583 in 1998, and 350,736 with a fair value
of $26,463,066 in 1999.

As of January 31, 1998 and 1999,  the Plan held  8,329,097 and 7,347,683  units,
respectively,  of Mobil ESOP Convertible  Preferred Stock,  which have yet to be
earned  by  employees.   The  current   values  of  these  unearned  units  were
$570,543,154 in 1998 and $642,922,263 in 1999. Net assets available for benefits
at January 31, 1998 and 1999, included unrealized gains on the unallocated units
of $246,749,503 and $357,281,086, respectively, since the ESOP's inception.

As a result of the  two-for-one  split of Mobil  Common  Stock in May 1997,  the
number of  outstanding  shares of Mobil  ESOP  Convertible  Preferred  Stock was
doubled and the dividend rate and liquidation price were halved.  All references
in this  report  to the  number  of  shares  of such  stock,  dividend  rate and
liquidation price reflect, in some cases as a result of retroactive adjustments,
these stock split-related changes.

Note 5.  Contributions and Distributions

Mobil's  contributions  are net of  forfeitures of $229,409 and $270,663 for the
years ended January 31, 1998 and 1999, respectively.


                                        9

<PAGE>


               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                         JANUARY 31, 1998 and 1999


Note 5.  Contributions and Distributions - continued

Transfers in include  participant-initiated  rollovers of certain  distributions
from other  tax-qualified  plans into the Savings Account.  Transfers out during
the year  ended  January  31,  1999  include a  trust-to-trust  transfer  of the
balances of former Mobil employees who became employees of the Aera Energy joint
venture.

The Plan provides for the payment of vested  benefits upon  termination,  death,
disability or retirement.

Note 6.  Participant Loans

The Plan allows participants to borrow against their accounts in the trust. Loan
interest  rates  are  reviewed  quarterly  and  determined  for  new  loans,  if
appropriate,  based on the "Bank Prime Loan" rate for the last  business  day of
the second preceding calendar month, as published in Federal Reserve Statistical
Release H.15. The term of loans may be any monthly  increment  between 12 and 60
months.

The maximum  loan amount  permitted  is the lesser of (i)  one-half  the current
value of the vested portion of the  participant's  account less any  outstanding
loan balance,  or (ii) $50,000 less the maximum  outstanding loan balance in the
preceding twelve months.

Note 7.  Plan Investments

At January 31, 1998 and 1999,  the percentage of the Plan's net assets that were
investments in or receivables from Mobil was 66% and 63%, respectively.

Investments in the Plan as of January 31, 1998 were as follows ($ millions):

                                                            Current
                                                  Cost       Value
                                                 ------     -------
  Mobil Common Stock..........................   $1,086      $2,093
  Mobil ESOP Convertible Preferred Stock......      663       1,168
  Merrill Lynch Floating Rate Long-Term
    Fixed Income Fund.........................      699         699
  Jennison Equity Fund........................      371         856
  Other lower risk funds - less than 5% of Plan
    net assets:
    Merrill Lynch Institutional Fund..........      114         114
    Merrill Lynch Global Allocation Fund......       82          84
    Merrill Lynch Equity Index Trust..........       68          94
    Franklin U.S. Government Securities Fund..       70          71
    AIM Charter Fund..........................       58          66
  Other higher risk funds - less than 5% of Plan 
    net assets:
    MFS Emerging Growth Fund..................      100         126
    Templeton Foreign Fund....................       63          61
    Templeton Developing Markets Trust........       42          33
  Participant Loans...........................       82          82
                                                 ------      ------
                                                 $3,498      $5,547
                                                 ======      ======

                                        10

<PAGE>


               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1998 and 1999


Note 7.  Plan Investments - continued

Investments in the Plan as of January 31, 1999 were as follows ($ millions):

                                                            Current
                                                  Cost       Value
                                                 ------     -------
  Mobil Common Stock..........................   $1,096      $2,458
  Mobil ESOP Convertible Preferred Stock......      639       1,438
  Merrill Lynch Floating Rate Long-Term
    Fixed Income Fund.........................      779         779
  Jennison Equity Fund........................      412       1,221
  Other lower risk funds - less than 5% of Plan
    net assets:
    Merrill Lynch Institutional Fund..........      127         127
    Merrill Lynch Global Allocation Fund......       73          67
    Merrill Lynch Equity Index Trust..........      101         153
    Franklin U.S. Government Securities Fund..      113         114
    AIM Charter Fund..........................       62          84
  Other higher risk funds - less than 5% of Plan net assets:
    MFS Emerging Growth Fund..................      104         157
    Templeton Foreign Fund....................       63          52
    Templeton Developing Markets Trust........       35          24
  Participant Loans...........................       74          74
                                                 ------      ------
                                                 $3,678      $6,748
                                                 ======      ======

The  Plan's  investment  in Mobil  Common  Stock at  January  31,  1998 and 1999
represented 3.9% and 3.6%, respectively, of the outstanding shares.

The average crediting interest rate of the Merrill Lynch Floating Rate Long-Term
Fixed  Income  Fund for the years  ended  January 31, 1998 and 1999 was 6.5% and
6.3%,  respectively.  The annualized crediting interest rate at January 31, 1998
and 1999 was 6.5% and 6.1%,  respectively.  Crediting  rates  fluctuate with the
activities of the underlying contracts. This investment choice has no fixed term
nor a minimum crediting interest rate in that context.

Note 8.  Tax Status

On October 23, 1998, the Internal  Revenue  Service  determined  that the entire
Plan, a stock bonus plan qualified under Section 401(a) of the Internal  Revenue
Code (the Code),  also qualifies as an employee stock ownership plan (an "ESOP")
under  section   4975(e)(7)  of  the  Code,  and  that  the  Trusts   thereunder
(collectively,  the Trust)  are exempt  from  Federal  income tax under  Section
501(a) of the Code.

Note 9.  Plan Termination

While Mobil has not  expressed an intent to terminate  the Plan, it may do so at
any time,  subject to the provisions of the Employee  Retirement Income Security
Act (ERISA).  In the event the Plan is terminated,  all participants will become
fully  vested  in  their  accounts  and the net  assets  of the  Plan  shall  be
distributed among the participants in accordance with ERISA.

                                      11
<PAGE>


               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1998 and 1999


Note 10.  Impact of Year 2000 (unaudited)

The Year 2000 issue is the result of computer  programs  being written using two
digits  rather  than four to define the  applicable  year.  Any of the  computer
programs  that have  time-sensitive  software  may  recognize  a date using "00"
rather   than  the  year  2000.   This  could   result  in  system   failure  or
miscalculations  causing  disruptions  of  operations,  including,  among  other
things,  a temporary  inability  to process  transactions  or engage in similar,
normal business activities.

Mobil has  essentially  completed an  assessment  of its  business  software and
equipment  from a year 2000  compliance  standpoint.  Mobil is in the process of
completing the modification or replacement of its materially  important business
software  and  equipment  that are not year 2000  compliant so that its computer
systems  will  function  properly  with  respect to dates in the year 2000.  The
Plan's service  providers have indicated that they are presently taking steps to
ensure that their systems and operations  that impact Plan  information  will be
Year 2000 compliant.



                                      12
<PAGE>

<TABLE>
<CAPTION>


                                         SUPPLEMENTAL INFORMATION

                              EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                         ITEM 27a - SCHEDULE OF ASSETS HELD FOR INVESTMENT PURPOSES
                                              JANUARY 31, 1999


<S>                                        <C>                                <C>         <C>      
                                           Description of Investment,                       CURRENT
Identity of Issue, Borrower,               Including Maturity Date, Rate of      COST        VALUE
  Lessor or Similar Party                  Interest, Par or Maturity Value      (000's)     (000's)
- ----------------------------------------------------------------------------------------------------
Corporate Stocks:
  Mobil Common Stock*                      28,088,090 shares                 $1,095,948  $2,457,708
  Mobil ESOP Convertible
    Preferred Stock*                          164,354 shares                    638,927   1,438,099

Registered Investment Companies:
  Merrill Lynch Institutional Fund*       126,731,686 shares                    126,732     126,732
  Massachusetts Financial Services Company
    MFS Emerging Growth Fund                3,273,929 shares                    103,732     156,788
  Merrill Lynch Global Allocation Fund*     5,240,459 shares                     72,992      66,763
  Franklin Custodian Funds, Inc. Franklin
    U.S. Government Securities Fund        16,458,090 shares                    112,621     113,890
  AIM Charter Fund                          5,344,412 shares                     61,689      83,907
  Franklin Templeton Group Templeton
    Foreign Fund                            6,350,266 shares                     62,501      52,390
  Franklin Templeton Group Templeton
    Developing Markets Trust                2,480,433 shares                     34,641      24,110

Common Collective Trust:
  Merrill Lynch Equity Index Trust*         1,760,066 shares                    100,976     153,705

Other investments:
  Jennison Associates Capital Corporation
    Jennison Equity Fund                   12,564,501 units                     412,376   1,220,641
  Merrill Lynch Floating Rate
    Long-Term Fixed Income Fund*          778,739,939 shares                    778,740     778,740

Participant loans, 6.0% to 9.0% interest rate range*                             74,238      74,238
                                                                             ----------  ----------
                                                                             $3,676,113  $6,747,711
                                                                             ==========  ==========

*  Party-in-interest as defined by ERISA

</TABLE>
                                                        13

<PAGE>

<TABLE>
<CAPTION>


                                         SUPPLEMENTAL INFORMATION

                              EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                              ITEM 27d - SCHEDULE OF REPORTABLE TRANSACTIONS
                                        YEAR ENDED JANUARY 31, 1999

<S>         <C>                    <C>        <C>      <C>      <C>         <C>       <C>          <C>
                                                                Expense               Current
                                                                Incurred              Value at      Net
Identity                           Purchase   Selling  Lease      With      Cost of   Transaction  Gain
of Party                           Price      Price    Rental  Transaction   Asset    Date        (Loss)
Involved    Description of Asset   (000's)    (000's)  (000's)   (000's)    (000's)   (000's)     (000's)
- ----------------------------------------------------------------------------------------------------------
Series of Transactions (Category iii)

Mobil*        Mobil Common Stock
              1,013 Purchases      $393,206                       $154     $393,360
              1,838 Sales                    $488,572              187      340,459   $488,385   $147,926

Merrill       Merrill Lynch Floating
Lynch*        Rate LTFI
              1,063 Purchases       571,711                                 571,711
              971   Sales                     491,777                       491,777    491,777       -



* Party-in-interest as defined by ERISA
There were no category (i), (ii) or (iv) reportable  transactions for the fiscal
year.

</TABLE>

                                                14
<PAGE>


                                    SIGNATURE


Pursuant to the  requirements of the Securities  Exchange Act of 1934, Mobil Oil
Corporation,  the  administrator  of the  Employees  Savings  Plan of Mobil  Oil
Corporation,  has duly caused  this Annual  Report to be signed on its behalf by
the undersigned hereunto duly authorized.



EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION


                                   MOBIL OIL CORPORATION





BY                                 /S/ GORDON G. GARNEY
NAME AND TITLE                     Gordon G. Garney, Senior
                                   Assistant Secretary
DATE                               May 12, 1999

                                   15
<PAGE>
         

                                EXHIBIT INDEX


EXHIBIT                                                 SUBMISSION MEDIA


23. Consent of Ernst & Young LLP,                       Electronic
    Independent Auditors,
    dated May 5, 1999.

                                     16
<PAGE>

                                 SIGNATURE

                                 EXHIBIT 23

             CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS


We consent to the incorporation by reference in the Registration Statements Form
S-8 (Nos.  33-18130 and 333-16819)  pertaining to the Employees  Savings Plan of
Mobil Oil  Corporation,  Form S-3 (Nos.  33-34133-01 and 333-67123) of the Mobil
Oil  Corporation  Employee Stock  Ownership Plan Trust for the  registration  of
$300,000,000 and $475,000,000, respectively, principal amount of debt securities
guaranteed by Mobil  Corporation  and in the related  Prospectus,  of our report
dated April 16, 1999, with respect to the financial  statements and supplemental
schedules of the  Employees  Savings Plan of Mobil Oil  Corporation  included in
this Annual Report (Form 11-K) for the fiscal year ended January 31, 1999.








                                                /S/ ERNST & YOUNG LLP
Fairfax, Virginia                               Ernst & Young LLP
May 5, 1999



                                     17


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