FORM 10-Q

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

(Mark One)

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

For the quarterly period ended September 30, 1999

OR

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

For the transition period from ________ to ___________

Commission file number: 0-3683

                              TRUSTMARK CORPORATION

State or other jurisdiction of                                (I.R.S. Employer
incorporation or organization                                Identification No.)
      Mississippi                                                64-0471500

Trustmark Corporation
248 East Capitol Street
Jackson, MS 39201
(601) 354-5111

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 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 registrant's classes of
common stock, as of October 31, 1999.

        Title                                                        Outstanding
Common stock, no par value                                            71,266,861



                          PART I. FINANCIAL INFORMATION
                          ITEM 1. FINANCIAL STATEMENTS

                     TRUSTMARK CORPORATION AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEETS
                       ($ in thousands except share data)



                                                                                  (Unaudited)
                                                                                   Sept. 30,    Dec. 31,
                                                                                      1999        1998
                                                                                  ----------   ----------
Assets
                                                                                         
Cash and due from banks (noninterest-bearing)                                     $  298,355   $  312,527
Federal funds sold and securities purchased
  under reverse repurchase agreements                                                101,781      185,619
Trading account securities                                                                          1,053
Securities available for sale (at fair value)                                        740,073      774,996
Securities held to maturity (fair value: $1,333,749 - 1999;
  $1,192,505-1998)                                                                 1,340,348    1,171,513
Loans                                                                              3,927,240    3,702,318
  Less:  Allowance for loan losses                                                    65,850       66,150
                                                                                  ----------   ----------
  Net loans                                                                        3,861,390    3,636,168
Premises and equipment                                                                79,888       70,750
Intangible assets                                                                     65,350       50,349
Other assets                                                                         169,776      152,215
                                                                                  ----------   ----------
  Total Assets                                                                    $6,656,961   $6,355,190
                                                                                  ==========   ==========


Liabilities
Deposits:
  Noninterest-bearing                                                             $  875,757   $  954,210
  Interest-bearing                                                                 2,872,455    2,992,187
                                                                                  ----------   ----------
    Total deposits                                                                 3,748,212    3,946,397
Federal funds purchased                                                              468,399      336,546
Securities sold under repurchase agreements                                        1,068,810      981,999
Short-term borrowings                                                                650,361      389,543
Other liabilities                                                                     55,311       48,829
                                                                                  ----------   ----------
  Total Liabilities                                                                5,991,093    5,703,314

Commitments and Contingencies

Shareholders' Equity
Common stock, no par value:
  Authorized:  250,000,000 shares
  Issued and outstanding: 71,408,561 shares - 1999;
    72,531,636 - 1998                                                                 14,877       15,111
Surplus                                                                              215,690      241,155
Retained earnings                                                                    429,855      378,567
Accumulated other comprehensive income, net of tax                                     5,446       17,043
                                                                                  ----------   ----------
  Total Shareholders' Equity                                                         665,868      651,876
                                                                                  ----------   ----------
  Total Liabilities and Shareholders' Equity                                      $6,656,961   $6,355,190
                                                                                  ==========   ==========


   See notes to consolidated financial statements.


                     TRUSTMARK CORPORATION AND SUBSIDIARIES
                        CONSOLIDATED STATEMENTS OF INCOME
                     ($ in thousands except per share data)
                                   (Unaudited)



                                                                    Three Months Ended        Nine Months Ended
                                                                       September 30,            September 30,
                                                                  ----------------------   ----------------------
                                                                     1999        1998         1999         1998
                                                                  ---------    ---------   ---------    ---------
Interest Income
                                                                                            
Interest and fees on loans                                        $  79,083    $  74,964   $ 231,882    $ 212,947
Interest on securities:
  Taxable interest income                                            30,668       29,158      88,517       89,233
  Interest income exempt from federal income taxes                    1,584        1,573       4,820        4,506
Interest on federal funds sold and securities
  purchased under reverse repurchase agreements                       1,175        1,484       6,893        2,919
                                                                  ---------    ---------   ---------    ---------
  Total Interest Income                                             112,510      107,179     332,112      309,605
Interest Expense
Interest on deposits                                                 25,742       31,483      79,985       94,394
Interest on federal funds purchased and securities
  sold under repurchase agreements                                   18,684       17,546      51,326       42,688
Other interest expense                                                7,202        1,131      17,774        4,787
                                                                  ---------    ---------   ---------    ---------
  Total Interest Expense                                             51,628       50,160     149,085      141,869
                                                                  ---------    ---------   ---------    ---------
Net Interest Income                                                  60,882       57,019     183,027      167,736
Provision for loan losses                                             1,593        2,221       6,062        5,188
                                                                  ---------    ---------   ---------    ---------
Net Interest Income After
  Provision for Loan Losses                                          59,289       54,798     176,965      162,548
Noninterest Income
Service charges on deposit accounts                                   9,650        7,816      28,200       22,203
Other account charges, fees and commissions                           8,806        5,899      23,974       17,082
Mortgage servicing fees                                               3,613        3,343      10,660       10,165
Trust service income                                                  3,598        3,515      10,703       10,237
Securities (losses) gains                                            (1,398)          10      (1,398)          40
Other income                                                          1,466        1,290       3,880        3,608
                                                                  ---------    ---------   ---------    ---------
  Total Noninterest Income                                           25,735       21,873      76,019       63,335
Noninterest Expenses
Salaries and employee benefits                                       24,813       22,388      74,096       66,757
Net occupancy - premises                                              2,708        2,692       7,717        7,468
Equipment expenses                                                    3,914        2,982      10,893        9,305
Services and fees                                                     6,639        6,690      19,374       20,185
Amortization of intangible assets                                     2,630        2,635       7,880        7,584
Other expense                                                         6,939        6,606      20,156       19,104
                                                                  ---------    ---------   ---------    ---------
  Total Noninterest Expenses                                         47,643       43,993     140,116      130,403
                                                                  ---------    ---------   ---------    ---------
Income Before Income Taxes                                           37,381       32,678     112,868       95,480
Income taxes                                                         12,439       11,501      38,877       34,172
                                                                  ---------    ---------   ---------    ---------
Net Income                                                        $  24,942    $  21,177   $  73,991    $  61,308
                                                                  =========    =========   =========    =========

Earnings Per Share
     Basic and Diluted                                            $    0.35    $    0.29   $    1.03    $    0.84
                                                                  =========    =========   =========    =========



See notes to consolidated financial statements.


                     TRUSTMARK CORPORATION AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                ($ in thousands)
                                   (Unaudited)



                                                                                  Nine Months Ended
                                                                                     September 30,
                                                                                ----------------------
                                                                                   1999         1998
                                                                                ---------    ---------
Operating Activities
                                                                                       
Net income                                                                      $  73,991    $  61,308
Adjustments to reconcile net income to net cash
  provided by operating activities:
    Provision for loan losses                                                       6,062        5,188
    Depreciation and amortization                                                  15,820       14,711
    Net amortization (accretion) of securities                                        681         (540)
    Securities losses (gains)                                                       1,398          (40)
    Net increase in intangible assets                                              (9,422)     (10,056)
    Net (increase) decrease in deferred income taxes                                  (36)       1,483
    Net increase in other assets                                                   (8,715)      (8,793)
    Net increase in other liabilities                                               1,832        4,945
    Other operating activities, net                                                (1,908)      (2,443)
                                                                                ---------    ---------
Net cash provided by operating activities                                          79,703       65,763
                                                                                ---------    ---------

Investing Activities
Proceeds from calls and maturities of securities available for sale                73,272       50,508
Proceeds from calls and maturities of securities held to maturity                 314,069      288,954
Proceeds from sales of securities available for sale                               49,014      174,440
Purchases of securities available for sale                                       (107,678)    (224,155)
Purchases of securities held to maturity                                         (483,448)    (109,346)
Net decrease (increase) in federal funds sold and securities
  purchased under reverse repurchase agreements                                    83,838     (202,870)
Net increase in loans                                                            (229,321)    (552,977)
Purchases of premises and equipment                                               (15,687)      (6,662)
Proceeds from sales of premises and equipment                                          31           94
Proceeds from sales of other real estate                                            1,701        2,339
Cash received in business combinations                                              6,358       13,035
                                                                                ---------    ---------
Net cash used by investing activities                                            (307,851)    (566,640)
                                                                                ---------    ---------

Financing Activities
Net decrease in deposits                                                         (198,185)     (25,153)
Net increase in federal funds purchased and
  securities sold under repurchase agreements                                     218,664      595,685
Net increase (decrease) in short-term borrowings                                  260,818      (28,312)
Common stock purchased and retired                                                (44,618)     (16,040)
Cash dividends                                                                    (22,703)     (18,009)
                                                                                ---------    ---------
Net cash provided by financing activities                                         213,976      508,171
                                                                                ---------    ---------
(Decrease ) increase in cash and cash equivalents                                 (14,172)       7,294
Cash and cash equivalents at beginning of year                                    312,527      292,555
                                                                                ---------    ---------
Cash and cash equivalents at end of period                                      $ 298,355    $ 299,849
                                                                                =========    =========


See notes to consolidated financial statements.



                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1 - BASIS OF FINANCIAL STATEMENT PRESENTATION AND PRINCIPLES OF
         CONSOLIDATION
        The accompanying  unaudited condensed  consolidated financial statements
have been prepared in conformity 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 the fair presentation of these consolidated
financial  statements  have been included.  The notes included  herein should be
read in  conjunction  with the notes to the  consolidated  financial  statements
included in Trustmark Corporation's (Trustmark) 1998 annual report on Form 10-K.
        The consolidated financial statements include the accounts of Trustmark,
its wholly-owned  subsidiary,  Trustmark National Bank (the Bank) and the Bank's
wholly-owned  subsidiaries,  Trustmark  Financial  Services,  Inc. and Trustmark
Insurance Agency, Inc. All intercompany profits,  balances and transactions have
been eliminated.

NOTE 2 - BUSINESS COMBINATIONS
        On  April  9,  1999,  Trustmark  completed  its  acquisition  of the Dan
Bottrell  Agency,  Inc.  (Bottrell),   an  independent   insurance  agency  with
approximately  $9  million in total  assets  located  in  Jackson,  Mississippi.
Trustmark issued  approximately  872 thousand shares of common stock in exchange
for all of the issued and outstanding common stock of Bottrell. This transaction
has been accounted for as a purchase business combination.

NOTE 3 - LOANS
        The following  table  summarizes  the activity in the allowance for loan
losses  for the nine  month  periods  ended  September  30,  1999 and 1998 ($ in
thousands):
                                                   1999        1998
                                                 --------    --------
Balance at beginning of year                     $ 66,150    $ 64,100
Provision charged to expense                        6,062       5,188
Loans charged off                                 (10,523)     (8,502)
Recoveries                                          4,161       4,064
Allowance applicable to loans of acquired bank                  1,300
                                                 --------    --------
Balance at end of period                         $ 65,850    $ 66,150
                                                 ========    ========

         At  September  30, 1999 and 1998,  the carrying  amounts of  nonaccrual
loans were $16.2  million  and $12.9  million,  respectively.  Included in these
nonaccrual  loans at September 30, 1999 and 1998,  are loans that are considered
to be impaired and totaled $12.6 million and $10.0 million,  respectively.  As a
result of direct  write-downs,  the specific allowance related to these impaired
loans was not material.  The average  carrying  amounts of impaired loans during
the  third  quarter  of 1999 and 1998 were  $11.0  million  and  $11.6  million,
respectively. No material amounts of interest income were recognized on impaired
loans or nonaccrual loans for the third quarter of 1999 or 1998.

NOTE 4 - CONTINGENCIES
        Trustmark and  its subsidiaries are parties to lawsuits and other claims
that arise in the  ordinary  course of  business;  some of the  lawsuits  assert
claims  related to the lending,  collection,  servicing,  investment,  trust and
other business  activities;  and some of the lawsuits allege  substantial claims
for damages. The cases are being vigorously contested.  In the regular course of
business,  Management evaluates estimated losses or costs related to litigation,
and provision is made for anticipated losses whenever  Management  believes that
such losses are probable and can be reasonably  estimated.  At the present time,
Management  believes,  based on the  advice  of legal  counsel,  that the  final
resolution  of pending  legal  proceedings  will not have a  material  impact on
Trustmark's consolidated financial position or results of operations.




NOTE 5 - EARNINGS PER SHARE
        Basic earnings per share (EPS) is computed by dividing net income by the
weighted average shares of common stock outstanding.  Diluted EPS is computed by
dividing net income by the weighted average shares of common stock  outstanding,
adjusted  for the effect of stock  options  outstanding  during the period.  The
following  table reflects  weighted  average shares used to calculate  Basic and
Diluted EPS for the periods presented:



                                                         Three Months Ended         Nine Months Ended
                                                            September 30,             September 30,
                                                       -----------------------   -----------------------
Weighted Average Shares Outstanding:                      1999         1998         1999         1998
                                                       ----------   ----------   ----------   ----------
                                                                                  
     Basic                                             71,852,672   72,773,616   72,172,543   72,935,602
     Diluted                                           71,905,462   72,829,648   72,217,268   73,002,104



NOTE 6 - STATEMENTS OF CASH FLOWS
        During the nine months ended September 30, 1999 and 1998, Trustmark paid
approximately $41.0 and $36.1 million, respectively, in income taxes. During the
nine months ended September 30, 1999 and 1998, Trustmark paid $152.1 million and
$145.2  million,  respectively,  in  interest on deposit  liabilities  and other
borrowings.  For the nine months  ended  September  30,  1999 and 1998,  noncash
transfers  from  loans to  foreclosed  properties  were  $1.7  million  and $1.1
million, respectively.

NOTE 7 - RECENT PRONOUNCEMENTS
        Recently,   the  Financial  Accounting  Standards  Board  (FASB)  issued
Statement of Financial  Accounting  Standards  (SFAS) No. 137,  "Accounting  for
Derivative  Instruments and Hedging  Activities - Deferral of the Effective Date
of FASB  Statement  No. 133 - an  Amendment  of FASB  Statement  No.  133." This
statement  amends  the  effective  date  for  SFAS  No.  133  which  establishes
accounting  and  reporting  standards  for  derivative  instruments  and hedging
activities.  The FASB  concluded  that it is  appropriate to defer the effective
date of SFAS No. 133 one year,  from fiscal years beginning after June 15, 1999,
to fiscal years  beginning  after June 15, 2000. The FASB continues to encourage
early  application of SFAS No. 133. The adoption of this statement will not have
a material impact on Trustmark's consolidated financial statements.

NOTE 8 - COMPREHENSIVE INCOME
        Comprehensive  income  is the  change  in  equity  during a period  from
transactions  and other  events and  circumstances  from  nonowner  sources.  It
includes  all changes in equity  during a period  except  those  resulting  from
investments by owners and  distributions  to owners.  For Trustmark,  changes in
comprehensive income consist entirely of changes in unrealized holding gains and
losses on securities available for sale.



The  following  table  reflects  the  calculation  of  comprehensive  income for
Trustmark  for the three  months and nine months  ended  September  30, 1999 and
1998, respectively ($ in thousands):



                                                Three Months Ended     Nine Months Ended
                                                   September 30,         September 30,
                                               --------------------   --------------------
                                                 1999        1998       1999        1998
                                               --------    --------   --------    --------
                                                                      
Net income                                     $ 24,942    $ 21,177   $ 73,991    $ 61,308
Unrealized holding (losses)/gains
  arising during the period on
  securities available for sale, net of  tax     (1,005)      6,493    (11,597)      8,776
                                               ========    ========   ========    ========
Comprehensive Income                           $ 23,937    $ 27,670   $ 62,394    $ 70,084
                                               ========    ========   ========    ========



MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS OF OPERATIONS
         The  following   provides  a  narrative   discussion  and  analysis  of
significant changes in Trustmark Corporation's (Trustmark) results of operations
and financial condition.  This discussion should be read in conjunction with the
consolidated  financial statements and the supplemental  financial data included
elsewhere in this report.
         The  Private  Securities  Litigation  Reform  Act  evidences  Congress'
determination  that the disclosure of  forward-looking  information is desirable
for  investors  and  encourages  such  disclosure by providing a safe harbor for
forward-looking statements by Management. Specifically,  Management's Discussion
and  Analysis  of  Financial   Condition  and  Results  of  Operations  contains
forward-looking  statements  with respect to the adequacy of the  allowance  for
loan losses; the effect of legal proceedings on Trustmark's financial condition,
results of operations and liquidity; Year 2000 compliance issues and market risk
disclosures.  Although  Management of Trustmark  believes that the  expectations
reflected in such  forward-looking  statements  are  reasonable,  it can give no
assurance that such expectations will prove to be correct.  Such forward-looking
statements are subject to certain risks,  uncertainties and assumptions.  Should
one  or  more  of  these  risks  materialize,  or  should  any  such  underlying
assumptions  prove  to be  significantly  different,  actual  results  may  vary
materially from those anticipated, estimated, projected or expected.

FINANCIAL SUMMARY
         Trustmark  reported  earnings of $24.9 million for the third quarter of
1999,  compared with $21.2 million for the third quarter of 1998, an increase of
17.8%.  Basic and diluted earnings per share were $0.35 for the third quarter of
1999, compared with $0.29 for the third quarter of 1998.
         Three  financial  ratios  used to  measure  performance  are  return on
average assets, return on average equity and the efficiency ratio. The return on
average  assets for the third quarter of 1999 was 1.51%  compared with 1.40% for
the same period in 1998.  The return on average  equity  reached  14.90% for the
quarter ended  September  30, 1999,  compared with 13.55% for the same period in
1998.  Trustmark's  efficiency  ratio for the third  quarter of 1999 improved to
53.04% from 54.56% in the third quarter of 1998.
         Trustmark's  net income  increased 20.7% to $74.0 million for the first
nine  months of 1999  compared  with $61.3  million in the same  period in 1998.
Basic and  diluted  earnings  per share for the first  nine  months of 1999 were
$1.03  compared with $0.84 for the first nine months of 1998.  Diversified  loan
growth  along with growth in  noninterest  income  produced  increased  earnings
during the first nine months of 1999.
         For the nine month period ended September 30, 1999,  Trustmark recorded
a return on average assets of 1.51%, a return on average equity of 15.11% and an
efficiency ratio of 52.69%. These compared with ratios for the first nine months
in 1998 of 1.42% for  return on  average  assets,  13.44%  for return on average
equity and 55.28% for the efficiency ratio.
         At September 30, 1999,  total loans were $3.93 billion,  an increase of
6.1% from year end 1998.  Total assets were $6.66 billion at September 30, 1999,
a 4.8% increase from  December 31, 1998.  Total  deposits at September 30, 1999,
were $3.75 billion, a 5.0% decrease from year end 1998. Shareholders' equity was
$666 million at September 30, 1999, a 2.2% increase from December 31, 1998.

BUSINESS COMBINATIONS
         Management is continually evaluating new markets in which to expand and
provide  its  financial  services.  On April 9, 1999,  Trustmark  completed  its
acquisition  of  the  Dan  Bottrell  Agency,  Inc.  (Bottrell),  an  independent
insurance  agency  with  approximately  $9  million in total  assets  located in
Jackson,  Mississippi.  Trustmark  issued  approximately  872 thousand shares of
common stock in exchange for all of the issued and  outstanding  common stock of
Bottrell.  This  transaction  has  been  accounted  for as a  purchase  business
combination.



ASSET/LIABILITY MANAGEMENT
Overview
         Market risk is the risk of loss arising from adverse  changes in market
prices and rates.  Trustmark has risk  management  policies to monitor and limit
exposure to market  risk.  Trustmark's  market risk is  comprised  primarily  of
interest rate risk created by its core banking activities in loans and deposits.
Management continually develops and applies cost-effective  strategies to manage
these  risks.  The  Asset/Liability  Committee  sets  the  day-to-day  operating
guidelines and approves strategies affecting net interest income and coordinates
activities  within policy limits  established  by the Board of Directors.  A key
objective of the asset/liability  management program is to quantify, monitor and
manage interest rate risk and to assist  Management in maintaining  stability in
the net interest margin under varying interest rate environments.

Market/Interest Rate Risk Management
         The primary  purpose in managing  interest rate risk is to  effectively
invest capital and to manage and preserve the value created by Trustmark's  core
banking  business.  Trustmark  utilizes  an  investment  portfolio  as  well  as
off-balance sheet instruments to manage the interest rate risk naturally created
through   its   business   activities.   The  primary   tool   utilized  by  the
Asset/Liability  Committee is a modeling  system that is run monthly in order to
provide  information used to evaluate exposure to interest rate risk, to project
earnings and manage  balance sheet growth.  This  modeling  system  utilizes the
following  scenarios  in  order  to  give  Management  a  method  of  evaluating
Trustmark's interest rate, basis and prepayment risk under different conditions:

  -  Rate shocked scenarios of up-and-down 100, 200 and 300 basis points.
  -  Yield curve twist of +/- 2 standard  deviations of the change in spread  of
     the three-month  treasury bill and the 10-year  treasury  note yields.
  -  Basis risk  scenarios  where federal funds/prime spread widens and tightens
     50 and 100 basis points.
  -  Prepayment risk scenarios, where projected  prepayment speeds in an up-and-
     down  200  basis  point  rate  scenario, are  compared to current projected
     prepayment speeds.

         Static gap analysis is a relatively  straightforward  tool for interest
rate  risk  measurement  used  mainly  in  highlighting  significant  short-term
repricing  volume  mismatches.  Utilized  in the table  below  are  Management's
assumptions  relating to  prepayments of certain loans and securities as well as
the maturity for rate  sensitive  assets and  liabilities.  The following  table
presents  Trustmark's rate sensitivity static gap analysis at September 30, 1999
($ in thousands):

                                                Interest Sensitive Within
                                                --------------------------
                                                  90 days       One Year
                                                -----------    -----------
Total rate sensitive assets                     $ 1,618,960    $ 2,554,759
Total rate sensitive liabilities                  2,562,400      3,557,066
                                                -----------    -----------
     Net gap                                    ($  943,440)   ($1,002,307)
                                                ===========    ===========

         The analysis indicates a negative gap position over the next three- and
twelve-month  periods which indicates that Trustmark would benefit somewhat from
a decrease in market  interest  rates.  Although  interest rates have increased,
Management  believes  there is adequate  flexibility  to alter the overall  rate
sensitivity structure as necessary to minimize exposure to these changes.

Derivative Financial Instruments
         Derivatives  are used to hedge interest rate exposures by modifying the
interest rate  characteristics of specific balance sheet instruments.  Trustmark
regularly enters into certain  derivative  financial  instruments in the form of
forward  interest  rate  contracts,   as  part  of  its  normal  asset/liability



management strategies.  Trustmark's  obligations under forward contracts consist
of  commitments  to sell  mortgage  loans  originated  and/or  purchased  in the
secondary market at a future date.  These  obligations are entered into in order
to fix the interest  rate at which  Trustmark  can offer  mortgage  loans to its
customers or purchase  mortgage  loans from other  financial  institutions.  Any
decline  in market  value  below the cost  basis of  mortgages  held for sale by
Trustmark at the end of a financial reporting period is recognized at that time.
At September 30, 1999,  Trustmark's exposure under commitments to sell mortgages
is immaterial.

Liquidity
         Trustmark's  goal is to  maintain  an  adequate  liquidity  position to
compensate for balance sheet  fluctuations and to provide funds for growth.  The
Asset/Liability  Committee establishes guidelines by which the current liquidity
position is monitored to ensure adequate funding capacity.  This is accomplished
through  the  active  management  of both the asset and  liability  sides of the
balance sheet and by maintaining  accessibility to local,  regional and national
funding  sources.  The  ability to maintain  consistent  earnings  and  adequate
capital also enhances Trustmark's liquidity.

EARNING ASSETS
         The  percentage  of  earning  assets  to  total  assets   measures  the
effectiveness  of Management's  efforts to invest  available funds into the most
efficient and profitable uses. Earning assets at September 30, 1999, were $6.109
billion,  or 91.78% of total assets,  compared with $5.835 billion, or 91.82% of
total assets for December 31, 1998,  an increase of $274 million,  or 4.7%,  and
results from growth in the loan and securities  portfolios  offset by a decrease
in  federal  funds  sold  and  securities  purchased  under  reverse  repurchase
agreements.

Loans
         Loans,  the largest  category of earning assets for Trustmark,  produce
the highest level of interest  income.  At September 30, 1999,  total loans were
$3.927 billion,  an increase of $224.9 million, or 6.1%, from the $3.702 billion
reported at December  31,  1998.  At  September  30,  1999,  loans were 64.3% of
Trustmark's earning assets compared with 63.4% at December 31, 1998. Loan growth
remained well diversified.
         Trustmark's  lending policies have produced  consistently  strong asset
quality.  Asset  quality in the financial  services  industry is measured by the
level of nonperforming assets which include  nonperforming loans,  consisting of
nonaccrual  and  restructured   loans,   and  other  real  estate.   Trustmark's
nonperforming  assets at September 30, 1999 and December 31, 1998,  are shown in
the following table ($ in thousands):

                                                Sept. 30,       Dec. 31,
                                                  1999            1998
                                                ---------       --------
Nonaccrual and restructured loans               $ 16,171        $ 13,253
Other real estate (ORE)                            1,984           1,859
                                                ========        ========
     Total nonperforming assets                 $ 18,155        $ 15,112
                                                ========        ========

Accruing loans past due 90 days or more         $  1,872        $  2,431
                                                ========        ========

Nonperforming assets/total loans and ORE            0.46%           0.41%
                                                ========        ========

        While the volume of nonperforming assets at September 30, 1999, reflects
a slight increase from year end 1998, as indicated in the preceding table above,
it remains at a manageable level.  This level of nonperforming  assets continues
to  compare  favorably  to those of peer  banks  as a  result  of sound  lending
practices  and  consistent  collection  efforts.  Management is not aware of any
additional  credits,  other than those identified above, where serious doubts as
to the repayment of principal and interest exist.



        The allowance  for loan losses is maintained at a level that  Management
and the Board of Directors  believe is adequate to absorb probable losses within
the loan  portfolio,  plus  losses  associated  with  off-balance  sheet  credit
instruments  such as letters of credit and  unfunded  lines of credit.  A formal
analysis is prepared  quarterly to assess the risk in the loan  portfolio and to
determine  the  adequacy of the  allowance  for loan losses.  Specifically,  the
analysis is based on factors such as historical loss experience  based on volume
and types of loans, volume and trends in delinquencies and nonaccruals, national
and local economic conditions and other pertinent information.  This analysis is
presented to the Credit Policy Committee with subsequent  review and approval by
the Board of Directors. At September 30, 1999, the allowance for loan losses was
$65.9 million,  representing 1.68% of total loans outstanding,  compared with an
allowance  for loan losses of $66.2  million at December 31, 1998,  representing
1.79% of total loans outstanding.
        Net charge-offs were $6.4 million or 0.22% of average loans for the nine
months ended September 30, 1999,  compared with $4.4 million or 0.18% of average
loans for first nine months of 1998.  Trustmark's  level of net  charge-offs  to
average loans continues to compare favorably to its peer group.

Securities
        The   securities   portfolio  is  utilized  to  provide  an   investment
alternative  for available  funds, a stable source of interest income and serves
as  collateral  for  pledges  for  public  deposits  and  securities  sold under
agreements to repurchase.  At September 30, 1999,  securities available for sale
(AFS), with a carrying value of $740.1 million,  and securities held to maturity
(HTM), with a carrying value of $1.340 billion,  combined to create a securities
portfolio  totaling $2.080  billion,  an increase of $133.9 million or 6.9% from
December 31, 1998. As a percentage of earning assets,  the securities  portfolio
increased from 33.4% at December 31, 1998 to 34.1% at September 30, 1999.
        Asset quality of the securities portfolio  is strong as evidenced by the
investment of over 85% of the  portfolio in U. S. Treasury and U. S.  Government
agency  obligations.  The REMIC and CMO issues held in the securities  portfolio
are entirely U. S. Government  agency issues.  In order to avoid excessive yield
volatility  from  unexpected  prepayments,  Trustmark's  normal  practice  is to
purchase  investment  securities  at or near  par  value to  reduce  the risk of
premium write-offs.
        At September  30, 1999,  securities  AFS had a carrying  value of $740.1
million and an amortized cost of $731.3  million.  This compares with a carrying
value of $775.0  million and an amortized cost of $747.4 million at December 31,
1998.  At  September  30, 1999,  gross  unrealized  gains were $16.2  million on
securities AFS while gross unrealized  losses were $7.3 million.  Net unrealized
gains  are shown in  shareholders'  equity as  accumulated  other  comprehensive
income, net of taxes and equaled $5.4 million at September 30, 1999.
        The carrying value of securities HTM was $1.340 billion at September 30,
1999,  compared  with  $1.172  billion  at year end 1998.  The fair value of HTM
securities  at  September  30, 1999,  was $1.334  billion  compared  with $1.193
billion  at  year  end  1998.  As a  percentage  of  the  securities  portfolio,
securities  HTM increased from 60.2% at December 31, 1998, to 64.4% at September
30, 1999, as Trustmark  chose to invest in U.S.  Treasury and Agency  securities
instead of reverse  repurchase  transactions,  due to market  conditions.  Gross
unrealized  gains  were $6.1  million  and gross  unrealized  losses  were $12.7
million on securities HTM at September 30, 1999.

Other Earning Assets
        Federal funds sold and  securities  purchased  under reverse  repurchase
agreements  were  $101.8  million at  September  30,  1999,  a decrease of $83.8
million when compared with year end 1998. Trustmark utilizes these products as a
short-term investment alternative whenever it has excess liquidity.

DEPOSITS AND OTHER INTEREST-BEARING LIABILITIES
        Trustmark's  deposit base is its primary  source of funding and consists
of core deposits from the communities  served by Trustmark.  Total deposits were
$3.748 billion at September 30, 1999, a decrease of $198.2 million over year end
1998.   This   decline  was   distributed   between   noninterest   bearing  and
interest-bearing deposits. During the third quarter of 1999, Trustmark began the
use of brokered CDs as an alternate  source of funding.  At September  30, 1999,
brokered CDs totaled $25 million.



        In order to  provide  additional  liquidity  for the  growth of  earning
assets,  Trustmark  continues to rely on  short-term  borrowings as an alternate
funding  source.  During the third  quarter  of 1999,  Trustmark  increased  its
advances  from the Federal Home Loan Bank (FHLB) by $100  million,  bringing the
balance in advances  outstanding to $490 million.  Other  short-term  borrowings
include federal funds purchased and securities sold under repurchase agreements.
During the first nine months of 1999, these borrowings increased $218.7 million.
At  September  30,  1999,  the balance of the  treasury tax and loan note option
account was $91.9 million compared with $33.1 million at December 31, 1998.

CONTINGENCIES
        Trustmark and its  subsidiaries are parties to lawsuits and other claims
that arise in the  ordinary  course of  business;  some of the  lawsuits  assert
claims  related to the lending,  collection,  servicing,  investment,  trust and
other business  activities;  and some of the lawsuits allege  substantial claims
for damages. The cases are being vigorously contested.  In the regular course of
business,  Management evaluates estimated losses or costs related to litigation,
and provision is made for anticipated losses whenever  Management  believes that
such losses are probable and can be reasonably  estimated.  At the present time,
Management  believes,  based on the  advice  of legal  counsel,  that the  final
resolution  of pending  legal  proceedings  will not have a  material  impact on
Trustmark's consolidated financial position or results of operations.

SHAREHOLDERS' EQUITY
        At September  30, 1999,  Trustmark  had  shareholders'  equity of $665.9
million an increase  of $14.0  million  when  compared  with year end 1998.  The
shareholders'  equity to assets ratio was 10.0% at September 30, 1999,  compared
with 10.26% at December 31, 1998.
        In November 1998, Trustmark  implemented a capital management plan which
authorized the repurchase of up to 7.5%, or 5.46 million shares of common stock.
Since  implementation of the plan,  Trustmark has purchased  approximately 2.240
million shares.  The repurchase  program,  which is subject to market conditions
and management discretion, has been implemented through open market purchases or
privately negotiated transactions.
        Cash dividends paid during the first nine months of 1999,  totaled $22.7
million, an increase of $4.7 million or 26.1% from $18.0 million paid during the
same period in 1998.  The payout  ratio of  dividends  per share to earnings per
share was 30.58% in the first  nine  months of 1999 and 29.46% in the first nine
months of 1998.  Dividends paid per share for the first nine months of 1999, was
$0.3150 or 27.3% higher than the $0.2475 per share paid in the first nine months
of 1998.  Trustmark's  book value at September 30, 1999, was $9.32 per share, an
increase of 5.1% from $8.87 per share one year earlier.

Regulatory - Risk Based Capital
        Trustmark and Trustmark  National Bank (the Bank) are subject to minimum
capital  requirements  which are  administered  by  various  Federal  regulatory
agencies. These capital requirements, as defined by Federal guidelines,  involve
quantitative  and  qualitative  measures  of  assets,  liabilities  and  certain
off-balance sheet instruments.  Failure to meet minimum capital requirements can
initiate certain mandatory,  and possibly additional  discretionary,  actions by
regulators  that,  if  undertaken,  could have a direct  material  effect on the
financial statements of both Trustmark and the Bank.
        Management  believes,  as of September 30, 1999,  that Trustmark and the
Bank meet all  capital  adequacy  requirements  to which  they are  subject.  At
September  30,  1999,  the  most  recent  notification  from the  Office  of the
Comptroller (OCC) categorized the Bank as well-capitalized. To be categorized in
this manner, the Bank must maintain minimum total risk-based,  Tier 1 risk-based
and Tier 1 leverage ratios  (defined in applicable  regulations) as set forth in
the  table  below.  There are no  significant  conditions  or  events  that have
occurred since the OCC's notification that Management believes have affected the
Bank's present classification.



        Actual and minimum  regulatory  capital  amounts and ratios at September
30, 1999, for Trustmark and the Bank are as follows ($ in thousands):



                                                                  Actual               Minimum Regulatory
                                                             Regulatory Capital         Capital Required
                                                             -------------------       ------------------
                                                               Amount      Ratio        Amount     Ratio
                                                              --------    ------       --------   ------
      Total Capital (to Risk Weighted Assets)
                                                                                       
           Trustmark Corporation                              $689,196    17.14%       $321,765    8.00%
           Trustmark National Bank                            $671,127    16.74%       $320,769    8.00%

      Tier 1 Capital (to Risk Weighted Assets)
           Trustmark Corporation                              $633,583    15.75%       $160,883    4.00%
           Trustmark National Bank                            $620,813    15.48%       $160,384    4.00%

      Tier 1 Capital (to Average Assets)
           Trustmark Corporation                              $633,583     9.68%       $261,874    4.00%
           Trustmark National Bank                            $620,813     9.49%       $261,566    4.00%


NET INTEREST INCOME
        Net interest income (NII) is interest income generated by earning assets
reduced  by the  interest  expense of funding  those  assets and is  Trustmark's
principal  source of  income.  Consequently,  changes  in the mix and  volume of
earning assets and  interest-bearing  liabilities,  and their related yields and
interest rates, can have a significant impact on earnings.
        During  the first  nine  months of 1999,  the level of NII grew by $15.3
million, or 9.1%, when compared with the first nine months of 1998. NII has been
positively  impacted  during 1999 by the growth in earning assets  exceeding the
growth in interest-bearing liabilities.
        Average  earning assets  increased 13.1% during the first nine months of
1999,  primarily  fueled by a 16.9% increase in average loans when compared with
the same period in the prior year. The combination of these factors  resulted in
interest  income  increasing by $22.5  million,  or 7.3%,  during the first nine
months of 1999,  when compared to the same period in 1998.  The  composition  of
average interest-bearing  liabilities has continued to change as Trustmark seeks
additional  funding  sources to support  the growth of earning  assets.  Average
interest-bearing  liabilities increased by 15.5% during the first nine months of
1999 over the same  period in 1998,  primarily  from  growth  in  federal  funds
purchased,   securities   sold  under   repurchase   agreements  and  short-term
borrowings.  Interest  expense for the first nine months of 1999  increased $7.2
million, or 5.1% over the same period in 1998, as a result of these factors.
        The table below  illustrates the changes in the net interest margin as a
percentage of average earning assets for the periods shown:

                                                      Nine Months Ended
                                                        September 30,
                                                      -----------------
                                                        1999      1998
                                                      -------    ------
Yield on interest-earning assets-FTE                    7.53%     7.93%
Rate on interest-bearing liabilities                    3.33%     3.58%
                                                      =======   =======
Net interest margin-FTE                                 4.20%     4.35%
                                                      =======   =======

         The fully taxable equivalent (FTE) yield on tax-exempt  income has been
computed  based  on a 35%  federal  marginal  tax rate  for all  periods  shown.
Trustmark  will  continue to monitor its interest  rate risk  policies to manage
exposure to changes in interest rates.

PROVISION FOR LOAN LOSSES
        The provision for loan losses  reflects  Management's  assessment of the
adequacy of the allowance for loan losses to absorb  probable  write-offs in the
loan  portfolio.  Factors  considered  in  the  assessment  include  growth  and
composition of the loan portfolio,  historical  credit loss experience,  current
and  anticipated   economic  conditions  and  changes  in  borrowers'  financial



positions.  During the first nine months of 1999, Trustmark's provision for loan
losses was $6.1 million  compared with $5.2 million for the same period in 1998.
The  provision to average  loans was 0.21% for the first nine months of 1999 and
1998.  Trustmark's  ratio of the  provision  for loan  losses to  average  loans
continues to compare favorably to the peer group.

NONINTEREST INCOME
        Trustmark stresses the importance of growth in noninterest income as one
of its key long-term  strategies.  This was  accomplished  during the first nine
months of 1999, as  noninterest  income,  excluding  security  gains and losses,
increased $14.1 million,  or 22.3%,  when compared with the first nine months of
1998. The primary growth in noninterest  income can be attributed to commissions
earned on insurance  products,  as well as fees earned from deposit products and
services.
        The largest single  category of noninterest  income,  service charges on
deposit accounts,  grew by $6.0 million, or 27.0%, when the first nine months of
1999 is compared with the same period in 1998.  Through the first nine months of
1999,  Trustmark was continuing the  implementation of its new  customer-focused
sales process named  Pinnacle.  As a result of Pinnacle,  growth in  transaction
accounts has been positively impacted.
        Other account charges, fees and commissions,  increased $6.9 million, or
40.3%,  when the first nine months of 1999 is  compared  with the same period in
1998. Of this increase, $4.8 million in net insurance commissions was the direct
result of the Bottrell acquisition and growth in revenues from annuity products.
Also  contributing  to the growth in this  category  during  these  periods were
revenues generated from cash management services,  credit cards and a variety of
other products and services.
        Mortgage  servicing  fees grew by $495  thousand  during  the first nine
months of 1999, when compared to the first nine months of 1998. At September 30,
1999, Trustmark serviced approximately $3.6 billion in mortgages.
        Trust service  income  increased by $466 thousand,  or 4.6%,  during the
first  nine  months  of 1999,  when  compared  to the same  period  in 1998,  as
Trustmark  continues  to be one of the  largest  providers  of asset  management
services in  Mississippi.  At September 30, 1999,  Trustmark had trust  accounts
with assets under administration with fair values of approximately $5.6 billion.

NONINTEREST EXPENSE
        Trustmark  continues to provide quality service to customers  within the
context  of  economic  discipline.  Total  noninterest  expense  increased  $9.7
million,  or 7.5%, during the first nine months of 1999, compared with the first
nine months of 1998. Included in this increase,  is $3.0 million attributable to
the Bottrell business combination.  When these expenses are excluded, the growth
in noninterest expenses is reduced to $6.7 million, or 5.1%
        Salaries and employee  benefits continue to comprise the largest portion
of noninterest expenses and increased $7.3 million, or 11.0%, when comparing the
first nine months of 1999 with the first nine  months of 1998.  Included in this
increase is $2.0 million attributable to the Bottrell business combination. When
these  expenses are  excluded,  the growth in salaries and employee  benefits is
reduced to $5.3 million, or 8.0%. The number of full-time  equivalent  employees
totaled 2,311 at September 30, 1999, and 2,199 at September 30, 1998.
        Occupancy  expense  increased $249  thousand,  or 3.3% in the first nine
months of 1999,  when  compared to the same period in 1998.  Equipment  expenses
increased  $1.6  million in the first nine months of 1999,  compared to the same
period in 1998. Trustmark has incurred additional costs during 1999 as it sought
to improve technology and enhance premises and equipment.
        Services and fees decreased $811 thousand,  or 4.0%,  when comparing the
first nine months of 1999 to the same period in 1998. This decrease is primarily
the result of a decline in legal and  professional  fees, which more than offset
an increase in operational expenses.



        The amortization of intangible assets increased $296 thousand,  or 3.9%,
when comparing the first nine months of 1999 with the first nine months of 1998.
Growth in the mortgage servicing portfolio was 8.4% during the first nine months
of 1999,  compared with the same period in 1998,  and has provided a larger base
of mortgage servicing rights that began amortizing.
        Various  minor  changes  in  a  large  number  of  operational   expense
categories  contributed  to the $1.1  million  increase in other  expenses  when
comparing the first nine months of 1999 to the same time period in 1998.
        Management  will  continue to monitor  closely the level of  noninterest
expenses  as  part  of its  effort  to  further  enhance  profitability  and the
efficiency ratio.

INCOME TAXES
        For the nine months  ended  September  30,  1999,  Trustmark's  combined
effective  tax rate was 34.4%,  compared with 35.8% for the same period in 1998.
The  decrease in  Trustmark's  effective  rate is due  primarily to a relatively
small change in various permanent differences as a percentage of pre-tax income.

RECENT PRONOUNCEMENTS
        Recently,   the  Financial  Accounting  Standards  Board  (FASB)  issued
Statement of Financial  Accounting  Standards  (SFAS) No. 137,  "Accounting  for
Derivative  Instruments and Hedging  Activities - Deferral of the Effective Date
of FASB  Statement  No. 133 - an  Amendment  of FASB  Statement  No.  133." This
statement  amends  the  effective  date  for  SFAS  No.  133  which  establishes
accounting  and  reporting  standards  for  derivative  instruments  and hedging
activities.  The FASB  concluded  that it is  appropriate to defer the effective
date of SFAS No. 133 one year,  from fiscal years beginning after June 15, 1999,
to fiscal years  beginning  after June 15, 2000. The FASB continues to encourage
early  application of SFAS No. 133. The adoption of this statement will not have
a material impact on the Corporation's consolidated financial statements.

YEAR 2000 COMPLIANCE
        Trustmark has completed the  renovation,  validation and  implementation
phase of its Year 2000  readiness  program  within  regulatory  guidelines.  All
systems and services,  which include Trustmark's  mission-critical  core banking
systems and  non-critical  systems,  have been placed in production as Year 2000
ready. These upgrades will ensure that our customers' financial transactions and
account  information  will be  processed in a timely and  accurate  manner.  The
development   and   validation   of  a   contingency   plan  that  includes  all
mission-critical  business  functions has also been completed.  This contingency
plan is designed to support the continued  operation of key areas of the bank in
the unlikely event that a Year 2000 problem should occur.
        To date, Trustmark has incurred and expensed  approximately $7.5 million
related to the assessment and  implementation  of the Year 2000 compliance plan.
The total  remaining cost of the Year 2000  compliance  plan will be expensed as
incurred  during 1999 and is not expected to have a material  adverse  effect on
Trustmark's results of operations.



Part II.  OTHER INFORMATION

Item 1. Legal Proceedings
        There were no material  developments for the quarter ended September 30,
1999,  other  than  those  disclosed  in the  Notes  to  Consolidated  Financial
Statements and Management's Discussion and Analysis of this Form 10-Q.

Item 6. Exhibits  and  Reports  on Form 8-K
     1. The following exhibits are included herein:

        (27) Financial Data Schedule

     2. On  July 14, 1999, Trustmark  filed  a  Form 8-K disclosing that through
        June 30, 1999, Trustmark  had  purchased  approximately 1,465,000 shares
        of Trustmark  Corporation common stock, including approximately  590,000
        during the second quarter of 1999 and 1,223,000  shares  year  to  date.
        This  repurchase   program  was authorized  by the Board of Directors on
        November 10, 1998.



                                   SIGNATURES
        Pursuant to the  requirements  of Section 13 or 15 (d) 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.

                              TRUSTMARK CORPORATION


BY: /s/ Richard G. Hickson                 BY: /s/ Zach L. Wasson
    ----------------------                     ------------------
    Richard G. Hickson                         Zach L. Wasson
    President & Chief                          Chief Financial and
    Executive Officer                          Accounting Officer

DATE: November 9, 1999                         DATE: November 9, 1999



                                  EXHIBIT INDEX


Exhibit Number                                                 Description
- --------------                                           -----------------------
     27                                                  Financial Data Schedule