BROWN INVESTMENT ADVISORY & TRUST CO
13F-HR, 1999-11-10
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13 F-E
09/30/99

0001079817
u5#oqmvv

NONE
1

J. Hieber
410-637-6895

None

13F-E
Form 13F Holdings Report

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C.  20549

FORM 13F

FORM 13F COVER PAGE

Report for the Calendar Year or Quarter

Ended: September 30, 1999

Check here if Amendment [  ]; Amendment
Number:
This Amendment   (Check only one.) : [   ]  is a restatement.
                        [   ]  adds new holdings entries.

Institutional Investment Manager Filing this Report    :

Name:          Brown Investment Advisory and Trust Company
Address:       19 South St
          Baltimore, MD  21202

13F File Number:  ??-?????

The institutional investment manager filing this report and the person by whom
it is signed hereby represent that the person signing the report is authorized
to submit it, that all information contained herein is true, correct and
complete, and the t it is understood that all required items, statements,
schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:

Name:          Gregg W. Hawes
Title:         Counsel
Phone:         410-695-6820
Signature, Place, and Date of Signing:

Gregg W. Hawes      Baltimore, MD  November 2, 1999

Report Type  (Check only one.):

[ x ] 13F Holdings Report
[  ] 13F Notice

[  ] 13F Combination Report

List of Other Managers Reporting for this Manager:
I represent that I am authorized to submit this form and that all information in
this form and the attachments to it is true, correct and complete and I
understand that all required items, statements and schedules are integral parts
of this form and that the submission of any amendment represents that all
unamended items, statements and schedules remain true, correct and complete as
previously submitted.
I AM SIGNING THIS REPORT AS REQUIRED BY THE SECURITIES EXCHANGE ACT OF 1934.

FORM 13F SUMMARY PAGE

Report Summary:

Number of Other Included Managers:

Form 13F Information Table Entry Total: 521

Form 13F Information Table Value Total: 2313415












                                                          FORM 13F
PAGE     1 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

XL CAP LTD                     CL A             G98255105      480     8500 SH
SOLE    01               8500        0        0
                                                        ---------- --------
                                                               480     8500

AHL SVCS INC                   COM              001296102    21530   863371 SH
SOLE    01             839271        0    24100
                                                        ---------- --------
                                                             21530   863371

AES CORP                       COM              00130H105      224     3850 SH
SOLE    01               3850        0        0
                                                        ---------- --------
                                                               224     3850

APAC TELESERVICES INC          COM              00185E106      130    40000 SH
DEFINED 01              40000        0        0
                                                        ---------- --------
                                                               130    40000

AT&T CORP                      COM              001957109     2501    44805 SH
SOLE    01              44705        0      100
                                                              1016    18200 SH
DEFINED 01              18200        0        0
                                                        ---------- --------
                                                              3516    63005

AT&T CORP                      COM LIB GRP A    001957208     1418    38594 SH
SOLE    01              38594        0        0
                                                        ---------- --------
                                                              1418    38594

ATMI INC                       COM              00207R101    23403   786667 SH
SOLE    01             764667        0    22000
                                                        ---------- --------
                                                             23403   786667

ABBOTT LABS                    COM              002824100    17260   380374 SH
SOLE    01             359716      250    20408
                                                              9110   200778 SH
DEFINED 01             198318     2460        0
                                                        ---------- --------
                                                             26370   581152

ACNIELSEN CORP                 COM              004833109      627    20733 SH
SOLE    01              20733        0        0
                                                        ---------- --------
                                                               627    20733

ADVANCED LTG TECHNOLOGIES      COM              00753C102    12350  1372182 SH
SOLE    01            1336782        0    35400
                                                        ---------- --------
                                                             12350  1372182

AIR PRODS & CHEMS INC          COM              009158106     1054    26192 SH
SOLE    01              25892        0      300
                                                               522    12970 SH
DEFINED 01              11910     1060        0
                                                        ---------- --------
                                                              1576    39162








                                                          FORM 13F
PAGE     2 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

ALCOA INC                      COM              013817101      248     4000 SH
SOLE    01               4000        0        0
                                                        ---------- --------
                                                               248     4000

ALLIEDSIGNAL INC               COM              019512102     1012    16070 SH
SOLE    01              15370        0      700
                                                        ---------- --------
                                                              1012    16070

ALLSTATE CORP                  COM              020002101      228     6356 SH
SOLE    01               6356        0        0
                                                               103     2876 SH
DEFINED 01               2876        0        0
                                                        ---------- --------
                                                               331     9232

AMERICA ONLINE INC DEL         COM              02364J104     3659    33260 SH
SOLE    01              33260        0        0
                                                               319     2900 SH
DEFINED 01               2900        0        0
                                                        ---------- --------
                                                              3978    36160

AMERICAN EXPRESS CO            COM              025816109     4426    34012 SH
SOLE    01              34012        0        0
                                                               234     1800 SH
DEFINED 01               1800        0        0
                                                        ---------- --------
                                                              4660    35812

AMERICAN GENERAL CORP          COM              026351106     2253    29895 SH
SOLE    01              29895        0        0
                                                        ---------- --------
                                                              2253    29895

AMERICAN HOME PRODS CORP       COM              026609107    14606   254562 SH
SOLE    01             238812        0    15750
                                                              2757    48046 SH
DEFINED 01              48046        0        0
                                                        ---------- --------
                                                             17362   302608

AMERICAN INTL GROUP INC        COM              026874107    21975   187416 SH
SOLE    01             170997      125    16294
                                                              5364    45749 SH
DEFINED 01              44907      842        0
                                                        ---------- --------
                                                             27339   233165

AMERICAN TOWER CORP            CL A             029912201     2534   105600 SH
SOLE    01             105600        0        0
                                                               307    12800 SH
DEFINED 01               3000        0     9800
                                                        ---------- --------
                                                              2842   118400

AMERITECH CORP NEW             COM              030954101     1088    14801 SH
SOLE    01              13701        0     1100
                                                               662     9000 SH
DEFINED 01               9000        0        0
                                                        ---------- --------
                                                              1749    23801








                                                          FORM 13F
PAGE     3 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

AMGEN INC                      COM              031162100      444     7300 SH
SOLE    01               7300        0        0
                                                               615    10100 SH
DEFINED 01              10100        0        0
                                                        ---------- --------
                                                              1059    17400

ANALOG DEVICES INC             COM              032654105      291     5800 SH
SOLE    01               5800        0        0
                                                        ---------- --------
                                                               291     5800

ANHEUSER BUSCH COS INC         COM              035229103      226     3185 SH
SOLE    01               3185        0        0
                                                                51      720 SH
DEFINED 01                720        0        0
                                                        ---------- --------
                                                               277     3905

APOLLO GROUP INC               CL A             037604105    31298  1178311 SH
SOLE    01            1146011        0    32300
                                                        ---------- --------
                                                             31298  1178311

APPLIED MATLS INC              COM              038222105       66      900 SH
SOLE    01                900        0        0
                                                               140     1900 SH
DEFINED 01               1900        0        0
                                                        ---------- --------
                                                               207     2800

ARMOR HOLDINGS INC             COM              042260109      330    31600 SH
SOLE    01              31600        0        0
                                                                42     4000 SH
DEFINED 01                  0        0     4000
                                                        ---------- --------
                                                               372    35600

ARTHROCARE CORP                COM              043136100    14231   694186 SH
SOLE    01             674936        0    19250
                                                        ---------- --------
                                                             14231   694186

ASPECT DEV INC                 COM              045234101    19827  1071703 SH
SOLE    01            1042203        0    29500
                                                        ---------- --------
                                                             19827  1071703

ASSOCIATES FIRST CAP CORP      CL A             046008108      245     5560 SH
SOLE    01               4760        0      800
                                                              1085    24594 SH
DEFINED 01              24594        0        0
                                                        ---------- --------
                                                              1331    30154

ASTROPOWER INC                 COM              04644A101     6105   348873 SH
SOLE    01             339098        0     9775
                                                        ---------- --------
                                                              6105   348873










                                                          FORM 13F
PAGE     4 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

ATLANTIC COAST AIRLINES HLDGS  COM              048396105    13568   714085 SH
SOLE    01             694335        0    19750
                                                        ---------- --------
                                                             13568   714085

ATLANTIC RICHFIELD CO          COM              048825103      473     5660 SH
SOLE    01               5660        0        0
                                                               164     1960 SH
DEFINED 01               1960        0        0
                                                        ---------- --------
                                                               637     7620

ATMEL CORP                     COM              049513104      384    14650 SH
SOLE    01              14650        0        0
                                                        ---------- --------
                                                               384    14650

AURORA BIOSCIENCES CORP        COM              051920106      116    16000 SH
SOLE    01              16000        0        0
                                                        ---------- --------
                                                               116    16000

AUTOMATIC DATA PROCESSING INC  COM              053015103     2037    46285 SH
SOLE    01              44485        0     1800
                                                               733    16660 SH
DEFINED 01              16660        0        0
                                                        ---------- --------
                                                              2770    62945

AVADO BRANDS INC               COM              05336P108    22942  2739400 SH
SOLE    01            2663875        0    75525
                                                        ---------- --------
                                                             22942  2739400

BB&T CORP                      COM              054937107      198     5390 SH
SOLE    01               5390        0        0
                                                                40     1097 SH
DEFINED 01               1097        0        0
                                                        ---------- --------
                                                               238     6487

AZURIX CORP                    COM              05501M104      260    13000 SH
SOLE    01              13000        0        0
                                                        ---------- --------
                                                               260    13000

BP AMOCO P L C                 SPONSORED ADR    055622104     5111    47104 SH
SOLE    01              44604        0     2500
                                                              3572    32921 SH
DEFINED 01              32921        0        0
                                                        ---------- --------
                                                              8683    80025

BANK OF AMERICA CORPORATION    COM              060505104     2207    30100 SH
SOLE    01              29300        0      800
                                                               821    11197 SH
DEFINED 01              11197        0        0
                                                        ---------- --------
                                                              3028    41297










                                                          FORM 13F
PAGE     5 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

BANK NEW YORK INC              COM              064057102      293     8000 SH
SOLE    01               8000        0        0
                                                        ---------- --------
                                                               293     8000

BANK ONE CORP                  COM              06423A103     2608    43792 SH
SOLE    01              36532        0     7260
                                                               293     4914 SH
DEFINED 01               4914        0        0
                                                        ---------- --------
                                                              2901    48706

BEA SYS INC                    COM              073325102      263     9200 SH
SOLE    01               9200        0        0
                                                        ---------- --------
                                                               263     9200

BECTON DICKINSON & CO          COM              075887109      197     6560 SH
SOLE    01               6560        0        0
                                                               168     5600 SH
DEFINED 01               5600        0        0
                                                        ---------- --------
                                                               365    12160

BELL ATLANTIC CORP             COM              077853109     1325    20269 SH
SOLE    01              19269        0     1000
                                                              1712    26188 SH
DEFINED 01              26188        0        0
                                                        ---------- --------
                                                              3037    46457

BELLSOUTH CORP                 COM              079860102     2243    48620 SH
SOLE    01              48620        0        0
                                                              1355    29366 SH
DEFINED 01              29366        0        0
                                                        ---------- --------
                                                              3597    77986

BERKSHIRE HATHAWAY INC DEL     CL B             084670207      255      114 SH
SOLE    01                114        0        0
                                                               269      120 SH
DEFINED 01                120        0        0
                                                        ---------- --------
                                                               524      234

BESTFOODS                      COM              08658U101      749    15133 SH
SOLE    01              11533        0     3600
                                                               709    14330 SH
DEFINED 01              14330        0        0
                                                        ---------- --------
                                                              1458    29463

BIONX IMPLANTS INC             COM              09064Q106     1878   341420 SH
SOLE    01             331820        0     9600
                                                        ---------- --------
                                                              1878   341420

BLACKROCK 2001 TERM TR INC     COM              092477108      473    52500 SH
SOLE    01              52500        0        0
                                                        ---------- --------
                                                               473    52500









                                                          FORM 13F
PAGE     6 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

BOEING CO                      COM              097023105      723    16440 SH
SOLE    01              16440        0        0
                                                                22      500 SH
DEFINED 01                500        0        0
                                                        ---------- --------
                                                               745    16940

BRIGHT HORIZON FAMILY SOLUTION COM              109195107     7073   374734 SH
SOLE    01             364434        0    10300
                                                        ---------- --------
                                                              7073   374734

BRISTOL MYERS SQUIBB CO        COM              110122108    18950   269038 SH
SOLE    01             246198      200    22640
                                                              7111   100956 SH
DEFINED 01             100006      950        0
                                                        ---------- --------
                                                             26061   369994

BROADVISION INC                COM              111412102    66689   904260 SH
SOLE    01             880360        0    23900
                                                        ---------- --------
                                                             66689   904260

BURLINGTON NORTHN SANTA FE CP  COM              12189T104      213     6871 SH
SOLE    01               6091        0      780
                                                                91     2948 SH
DEFINED 01               2948        0        0
                                                        ---------- --------
                                                               304     9819

CBT GROUP PUB LTD              SPNSRD ADR NEW   124853300      216    13100 SH
SOLE    01              13100        0        0
                                                        ---------- --------
                                                               216    13100

CBS CORP                       COM              12490K107     1712    39301 SH
SOLE    01              39301        0        0
                                                                30      700 SH
DEFINED 01                700        0        0
                                                        ---------- --------
                                                              1743    40001

CIGNA CORP                     COM              125509109       27      300 SH
SOLE    01                300        0        0
                                                               761     8550 SH
DEFINED 01               8550        0        0
                                                        ---------- --------
                                                               788     8850

CMS ENERGY CORP                COM              125896100     5856   139835 SH
SOLE    01             131340      200     8295
                                                               439    10480 SH
DEFINED 01               9990      490        0
                                                        ---------- --------
                                                              6294   150315

CNF TRANSN INC                 COM              12612W104      241     6250 SH
SOLE    01               6250        0        0
                                                        ---------- --------
                                                               241     6250









                                                          FORM 13F
PAGE     7 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

CSG SYS INTL INC               COM              126349109      249     9500 SH
SOLE    01               9500        0        0
                                                        ---------- --------
                                                               249     9500

CSX CORP                       COM              126408103       45     1000 SH
SOLE    01               1000        0        0
                                                               787    17354 SH
DEFINED 01              17354        0        0
                                                        ---------- --------
                                                               833    18354

CVS CORP                       COM              126650100    12677   249785 SH
SOLE    01             230500      200    19085
                                                              1572    30975 SH
DEFINED 01              30975        0        0
                                                        ---------- --------
                                                             14249   280760

CAPITAL ONE FINL CORP          COM              14040H105     2163    38837 SH
SOLE    01              33437      200     5200
                                                                45      800 SH
DEFINED 01                800        0        0
                                                        ---------- --------
                                                              2207    39637

CARDINAL HEALTH INC            COM              14149Y108    11587   180689 SH
SOLE    01             166039      500    14150
                                                               623     9717 SH
DEFINED 01               9717        0        0
                                                        ---------- --------
                                                             12210   190406

CARNIVAL CORP                  COM              143658102    10573   218010 SH
SOLE    01             195561      250    22199
                                                               809    16675 SH
DEFINED 01              16675        0        0
                                                        ---------- --------
                                                             11382   234685

CENDANT CORP                   COM              151313103    10600   517079 SH
SOLE    01             517079        0        0
                                                                81     3965 SH
DEFINED 01                  0        0     3965
                                                        ---------- --------
                                                             10681   521044

CENTRAL GARDEN & PET CO        COM              153527106      228    22200 SH
SOLE    01              22200        0        0
                                                        ---------- --------
                                                               228    22200

CHASE MANHATTAN CORP NEW       COM              16161A108    16347   188979 SH
SOLE    01             176588      150    12241
                                                              2507    28977 SH
DEFINED 01              28977        0        0
                                                        ---------- --------
                                                             18853   217956












                                                          FORM 13F
PAGE     8 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------
CHECKFREE HOLDINGS CORP        COM              162816102   252179  6132077 SH
OTHER   01                  0        0  6132077
                                                        ---------- --------
                                                            252179  6132077

CHEVRON CORPORATION            COM              166751107     8704    91557 SH
SOLE    01              82982      100     8475
                                                              2499    26293 SH
DEFINED 01              26293        0        0
                                                        ---------- --------
                                                             11203   117850

CHUBB CORP                     COM              171232101      480     6903 SH
SOLE    01               3403        0     3500
                                                              2518    36225 SH
DEFINED 01              36225        0        0
                                                        ---------- --------
                                                              2997    43128

CIRCUIT CITY STORE INC         CIRCT CITY GRP   172737108      108     1160 SH
SOLE    01               1160        0        0
                                                              1042    11200 SH
DEFINED 01              11200        0        0
                                                        ---------- --------
                                                              1149    12360

CISCO SYS INC                  COM              17275R102    26520   411561 SH
SOLE    01             384172      200    27189
                                                              5226    81107 SH
DEFINED 01              81107        0        0
                                                        ---------- --------
                                                             31746   492668

CITIGROUP INC                  COM              172967101    23101   486337 SH
SOLE    01             460055      250    26032
                                                              3267    68772 SH
DEFINED 01              68772        0        0
                                                        ---------- --------
                                                             26368   555109

CLEAR CHANNEL COMMUNICATIONS   COM              184502102     3753    54435 SH
SOLE    01              54435        0        0
                                                               676     9800 SH
DEFINED 01                  0        0     9800
                                                        ---------- --------
                                                              4428    64235

CLEARNET COMMUNICATIONS INC    CL A NON-VTG     184902104      286    20500 SH
SOLE    01              20500        0        0
                                                        ---------- --------
                                                               286    20500

CLOROX CO DEL                  COM              189054109      442     4140 SH
SOLE    01               3740        0      400
                                                        ---------- --------
                                                               442     4140

COCA COLA CO                   COM              191216100     5942    95838 SH
SOLE    01              93848        0     1990
                                                              3557    57376 SH
DEFINED 01              57376        0        0
                                                        ---------- --------
                                                              9499   153214












                                                          FORM 13F
PAGE     9 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

COLGATE PALMOLIVE CO           COM              194162103    38142   387229 SH
SOLE    01             364076      300    22853
                                                              6921    70262 SH
DEFINED 01              68642     1620        0
                                                        ---------- --------
                                                             45063   457491

COLLAGENEX PHARMACEUTICALS INC COM              19419B100     2215   221488 SH
SOLE    01             215538        0     5950
                                                        ---------- --------
                                                              2215   221488

COMCAST CORP                   CL A SPL         200300200      316     8228 SH
SOLE    01               8228        0        0
                                                        ---------- --------
                                                               316     8228

COMPAQ COMPUTER CORP           COM              204493100     5250   221656 SH
SOLE    01             199994      500    21162
                                                              1951    82366 SH
DEFINED 01              78316     4050        0
                                                        ---------- --------
                                                              7201   304022

COMPUTER ASSOC INTL INC        COM              204912109    10975   200450 SH
SOLE    01             178073      250    22127
                                                              3203    58502 SH
DEFINED 01              57002     1500        0
                                                        ---------- --------
                                                             14178   258952

CONSECO INC                    COM              208464107      737    24200 SH
SOLE    01              24200        0        0
                                                                43     1428 SH
DEFINED 01                428        0     1000
                                                        ---------- --------
                                                               780    25628

CONSTELLATION ENERGY CORP      COM              210371100      990    33429 SH
SOLE    01              33429        0        0
                                                               226     7623 SH
DEFINED 01               7623        0        0
                                                        ---------- --------
                                                              1216    41052

COUNTRYWIDE CR INDS INC DEL    COM              222372104      227     5300 SH
SOLE    01               5300        0        0
                                                        ---------- --------
                                                               227     5300

COVOL TECHNOLOGIES INC         COM              223575101      205    40000 SH
DEFINED 01              40000        0        0
                                                        ---------- --------
                                                               205    40000

CUMULUS MEDIA INC              CL A             231082108      330    15100 SH
SOLE    01              14700        0      400
                                                        ---------- --------
                                                               330    15100










                                                          FORM 13F
PAGE    10 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

DII GROUP INC                  COM              232949107       68     1830 SH
SOLE    01               1830        0        0
                                                               344     9230 SH
DEFINED 01               9230        0        0
                                                        ---------- --------
                                                               413    11060

DANA CORP                      COM              235811106      106     2292 SH
SOLE    01               2292        0        0
                                                               239     5191 SH
DEFINED 01               5191        0        0
                                                        ---------- --------
                                                               345     7483

DANAHER CORP DEL               COM              235851102     2293    39450 SH
SOLE    01              38650        0      800
                                                               564     9700 SH
DEFINED 01               9700        0        0
                                                        ---------- --------
                                                              2857    49150

DAYTON HUDSON CORP             COM              239753106     7547   116101 SH
SOLE    01             109886      150     6065
                                                               982    15105 SH
DEFINED 01              15105        0        0
                                                        ---------- --------
                                                              8528   131206

DEERE & CO                     COM              244199105     5385   137430 SH
SOLE    01             130070      200     7160
                                                               461    11755 SH
DEFINED 01              11755        0        0
                                                        ---------- --------
                                                              5846   149185

DELL COMPUTER CORP             COM              247025109     1015    27430 SH
SOLE    01              27430        0        0
                                                               134     3625 SH
DEFINED 01               3625        0        0
                                                        ---------- --------
                                                              1149    31055

DISNEY WALT CO                 COM              254687106    12294   398990 SH
SOLE    01             370890        0    28100
                                                              2839    92133 SH
DEFINED 01              89233     1700     1200
                                                        ---------- --------
                                                             15132   491123

DOCUMENTUM INC                 COM              256159104     8075   618195 SH
SOLE    01             600895        0    17300
                                                        ---------- --------
                                                              8075   618195

DOLLAR GEN CORP                COM              256669102      459    15831 SH
SOLE    01              15831        0        0
                                                        ---------- --------
                                                               459    15831












                                                          FORM 13F
PAGE    11 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

DONNELLEY R R & SONS CO        COM              257867101      408    11008 SH
SOLE    01              11008        0        0
                                                                74     2000 SH
DEFINED 01               2000        0        0
                                                        ---------- --------
                                                               482    13008

DOVER CORP                     COM              260003108    10569   301963 SH
SOLE    01             279313      300    22350
                                                              7329   209410 SH
DEFINED 01             209410        0        0
                                                        ---------- --------
                                                             17898   511373

DOW CHEM CO                    COM              260543103      291     2295 SH
SOLE    01               2295        0        0
                                                               556     4383 SH
DEFINED 01               4383        0        0
                                                        ---------- --------
                                                               847     6678

DU PONT E I DE NEMOURS & CO    COM              263534109    19022   278460 SH
SOLE    01             262240      150    16070
                                                              3184    46611 SH
DEFINED 01              46011      600        0
                                                        ---------- --------
                                                             22206   325071

DUKE ENERGY CORP               COM              264399106      370     6804 SH
SOLE    01               6804        0        0
                                                               245     4500 SH
DEFINED 01               4500        0        0
                                                        ---------- --------
                                                               615    11304

DUN & BRADSTREET CORP DEL      COM              26483B106     2502    70616 SH
SOLE    01              37516        0    33100
                                                              3145    88738 SH
DEFINED 01              47706    14732    26300
                                                        ---------- --------
                                                              5647   159354

E M C CORP MASS                COM              268648102      307     5580 SH
SOLE    01               5580        0        0
                                                        ---------- --------
                                                               307     5580

EASTMAN KODAK CO               COM              277461109      630     9295 SH
SOLE    01               9295        0        0
                                                               256     3780 SH
DEFINED 01               3780        0        0
                                                        ---------- --------
                                                               886    13075

EATON CORP                     COM              278058102      135     1471 SH
SOLE    01               1471        0        0
                                                               920    10000 SH
DEFINED 01              10000        0        0
                                                        ---------- --------
                                                              1055    11471











                                                          FORM 13F
PAGE    12 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

ECLIPSYS CORP                  COM              278856109    27614  1153628 SH
SOLE    01            1121523        0    32105
                                                        ---------- --------
                                                             27614  1153628

ELAN PLC                       ADR              284131208      300    10800 SH
SOLE    01              10800        0        0
                                                        ---------- --------
                                                               300    10800

ELECTRONIC ARTS INC            COM              285512109      722    13300 SH
SOLE    01              13300        0        0
                                                        ---------- --------
                                                               722    13300

ELECTRONIC DATA SYS NEW        COM              285661104      353     6240 SH
SOLE    01               6240        0        0
                                                               379     6700 SH
DEFINED 01               6700        0        0
                                                        ---------- --------
                                                               733    12940

EMERSON ELEC CO                COM              291011104     1518    24120 SH
SOLE    01              24120        0        0
                                                               340     5400 SH
DEFINED 01               5400        0        0
                                                        ---------- --------
                                                              1858    29520

ENRON CORP                     COM              293561106     1394    17046 SH
SOLE    01              17046        0        0
                                                              1075    13152 SH
DEFINED 01              13152        0        0
                                                        ---------- --------
                                                              2469    30198

ENRON CORP                     PFD 2CV $10.50   293561601      475      450 SH
SOLE    01                450        0        0
                                                        ---------- --------
                                                               475      450

EQUITY RESIDENTIAL PPTYS TR    SH BEN INT       29476L107      224     4982 SH
SOLE    01               4982        0        0
                                                        ---------- --------
                                                               224     4982

ERICSSON L M TEL CO            ADR CL B SEK10   294821400      651    19775 SH
SOLE    01              19775        0        0
                                                               660    20024 SH
DEFINED 01              20024        0        0
                                                        ---------- --------
                                                              1311    39799

EXXON CORP                     COM              302290101    34900   452507 SH
SOLE    01             437640        0    14867
                                                             25097   325410 SH
DEFINED 01             324000     1410        0
                                                        ---------- --------
                                                             59997   777917










                                                          FORM 13F
PAGE    13 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

F&M BANCORP MD                 COM              302367107      555    16530 SH
SOLE    01              16530        0        0
                                                        ---------- --------
                                                               555    16530

FEDERAL HOME LN MTG CORP       COM              313400301    14078   242727 SH
SOLE    01             228202        0    14525
                                                              1130    19487 SH
DEFINED 01              19487        0        0
                                                        ---------- --------
                                                             15208   262214

FEDERAL NATL MTG ASSN          COM              313586109     1808    26484 SH
SOLE    01              23104        0     3380
                                                              3831    56134 SH
DEFINED 01              56134        0        0
                                                        ---------- --------
                                                              5639    82618

FEDERATED DEPT STORES INC DEL  COM              31410H101      578    10920 SH
SOLE    01               9270        0     1650
                                                               541    10215 SH
DEFINED 01              10215        0        0
                                                        ---------- --------
                                                              1119    21135

FIRST DATA CORP                COM              319963104      252     5150 SH
SOLE    01               5150        0        0
                                                        ---------- --------
                                                               252     5150

FIRST UN CORP                  COM              337358105     1875    39786 SH
SOLE    01              39786        0        0
                                                               591    12544 SH
DEFINED 01              12544        0        0
                                                        ---------- --------
                                                              2466    52330

FLOWERS INDS INC               COM              343496105       65     3000 SH
SOLE    01               3000        0        0
                                                               533    24562 SH
DEFINED 01              24562        0        0
                                                        ---------- --------
                                                               598    27562

FORD MTR CO DEL                COM              345370100     1217    21555 SH
SOLE    01              21555        0        0
                                                               226     4000 SH
DEFINED 01               4000        0        0
                                                        ---------- --------
                                                              1442    25555

FORTUNE BRANDS INC             COM              349631101       50     1200 SH
SOLE    01               1200        0        0
                                                               155     3750 SH
DEFINED 01               3750        0        0
                                                        ---------- --------
                                                               205     4950

FORWARD AIR CORP               COM              349853101    24894   885121 SH
SOLE    01             860721        0    24400
                                                        ---------- --------
                                                             24894   885121








                                                          FORM 13F
PAGE    14 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

FRANKLIN RES INC               COM              354613101     3903    96085 SH
SOLE    01              91215        0     4870
                                                               281     6913 SH
DEFINED 01               6913        0        0
                                                        ---------- --------
                                                              4184   102998

GTE CORP                       COM              362320103     6667    88306 SH
SOLE    01              79421      100     8785
                                                              1306    17303 SH
DEFINED 01              16348      955        0
                                                        ---------- --------
                                                              7974   105609

GANNETT INC                    COM              364730101      401     5625 SH
SOLE    01               5625        0        0
                                                               314     4400 SH
DEFINED 01               4400        0        0
                                                        ---------- --------
                                                               716    10025

GAP INC DEL                    COM              364760108     5972   118559 SH
SOLE    01             111359        0     7200
                                                               340     6749 SH
DEFINED 01               6749        0        0
                                                        ---------- --------
                                                              6312   125308

GENERAL ELEC CO                COM              369604103    49415   437297 SH
SOLE    01             419296        0    18001
                                                             33394   295521 SH
DEFINED 01             294919      602        0
                                                        ---------- --------
                                                             82808   732818

GENERAL MLS INC                COM              370334104      273     3400 SH
SOLE    01               3400        0        0
                                                        ---------- --------
                                                               273     3400

GENERAL MTRS CORP              COM              370442105      216     3268 SH
SOLE    01               3268        0        0
                                                                36      550 SH
DEFINED 01                550        0        0
                                                        ---------- --------
                                                               252     3818

GENESIS HEALTH VENTURES INC    COM              371912106       66    22144 SH
SOLE    01              22144        0        0
                                                        ---------- --------
                                                                66    22144

GETTY IMAGES INC               COM              374276103    20342  1077697 SH
SOLE    01            1048247        0    29450
                                                        ---------- --------
                                                             20342  1077697

GILLETTE CO                    COM              375766102    14256   347719 SH
SOLE    01             325036      300    22383
                                                              1853    45200 SH
DEFINED 01              44180     1020        0
                                                        ---------- --------
                                                             16110   392919








                                                          FORM 13F
PAGE    15 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

GLOBAL TELESYSTEMS GROUP       COM              37936U104     3272    40400 SH
SOLE    01              40400        0        0
                                                               389     4800 SH
DEFINED 01                  0        0     4800
                                                        ---------- --------
                                                              3661    45200

GOLDEN ST BANCORP INC          WT EXP  000000   381197136       14    10450 SH
SOLE    01              10450        0        0
                                                        ---------- --------
                                                                14    10450

GRAINGER W W INC               COM              384802104      492     9143 SH
SOLE    01               9143        0        0
                                                                27      500 SH
DEFINED 01                500        0        0
                                                        ---------- --------
                                                               519     9643

GUIDANT CORP                   COM              401698105      153     3000 SH
SOLE    01               3000        0        0
                                                              1535    30032 SH
DEFINED 01              30032        0        0
                                                        ---------- --------
                                                              1689    33032

GUILFORD PHARMACEUTICALS INC   COM              401829106     2847   223328 SH
SOLE    01             217128        0     6200
                                                        ---------- --------
                                                              2847   223328

HALLIBURTON CO                 COM              406216101    12948   286146 SH
SOLE    01             263101      300    22745
                                                              2138    47255 SH
DEFINED 01              47255        0        0
                                                        ---------- --------
                                                             15086   333401

HARRIS CORP DEL                COM              413875105      346     8825 SH
SOLE    01               8825        0        0
                                                        ---------- --------
                                                               346     8825

HARSCO CORP                    COM              415864107     3318   103702 SH
SOLE    01             103702        0        0
                                                        ---------- --------
                                                              3318   103702

HEALTH CARE PPTY INVS INC      COM              421915109      211     7300 SH
SOLE    01               7300        0        0
                                                               520    18000 SH
DEFINED 01              18000        0        0
                                                        ---------- --------
                                                               731    25300

HEINZ H J CO                   COM              423074103      263     5245 SH
SOLE    01               5245        0        0
                                                                16      320 SH
DEFINED 01                320        0        0
                                                        ---------- --------
                                                               279     5565









                                                          FORM 13F
PAGE    16 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

HELMERICH & PAYNE INC          COM              423452101      330    13960 SH
SOLE    01              13960        0        0
                                                        ---------- --------
                                                               330    13960

HEWLETT PACKARD CO             COM              428236103    18763   186693 SH
SOLE    01             171728        0    14965
                                                              5402    53751 SH
DEFINED 01              52819      932        0
                                                        ---------- --------
                                                             24165   240444

HOME DEPOT INC                 COM              437076102    15957   247637 SH
SOLE    01             235397        0    12240
                                                              4393    68175 SH
DEFINED 01              68175        0        0
                                                        ---------- --------
                                                             20350   315812

HONEYWELL INC                  COM              438506107     3528    30446 SH
SOLE    01              27391        0     3055
                                                              2229    19235 SH
DEFINED 01              18510      725        0
                                                        ---------- --------
                                                              5757    49681

HOST MARRIOTT CORP NEW         COM              44107P104      174    14613 SH
SOLE    01              14613        0        0
                                                                 0       10 SH
DEFINED 01                 10        0        0
                                                        ---------- --------
                                                               174    14623

HYPERION 1999 TERM TR INC      COM              448913103      627    88000 SH
SOLE    01              88000        0        0
                                                               207    29000 SH
DEFINED 01              29000        0        0
                                                        ---------- --------
                                                               834   117000

HYPERION 2002 TERM TR INC      COM              448915108     1441   172000 SH
SOLE    01             172000        0        0
                                                        ---------- --------
                                                              1441   172000

HYPERION SOLUTIONS CORP        COM              44914M104      944    53000 SH
SOLE    01              53000        0        0
                                                               103     5800 SH
DEFINED 01                  0        0     5800
                                                        ---------- --------
                                                              1047    58800

IMS HEALTH INC                 COM              449934108     2085    66707 SH
SOLE    01              16032        0    50675
                                                              4407   141038 SH
DEFINED 01              58038        0    83000
                                                        ---------- --------
                                                              6492   207745

IL FORNAIO AMER CORP           COM              451926109     6595   441532 SH
SOLE    01             429132        0    12400
                                                        ---------- --------
                                                              6595   441532








                                                          FORM 13F
PAGE    17 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

ILLINOIS TOOL WKS INC          COM              452308109     4699    57478 SH
SOLE    01              55578        0     1900
                                                               213     2610 SH
DEFINED 01               2610        0        0
                                                        ---------- --------
                                                              4912    60088

INCYTE PHARMACEUTICALS INC     COM              45337C102     7922   299655 SH
SOLE    01             291305        0     8350
                                                        ---------- --------
                                                              7922   299655

INGERSOLL RAND CO              COM              456866102    11038   170805 SH
SOLE    01             161705      150     8950
                                                               595     9204 SH
DEFINED 01               9204        0        0
                                                        ---------- --------
                                                             11633   180009

INTEGRATED SYS INC             COM              45812M104    25825  2197909 SH
SOLE    01            2141109        0    56800
                                                               103     8800 SH
DEFINED 01                  0        0     8800
                                                        ---------- --------
                                                             25929  2206709

INTEL CORP                     COM              458140100    26520   445719 SH
SOLE    01             423359        0    22360
                                                              8947   150376 SH
DEFINED 01             148776     1600        0
                                                        ---------- --------
                                                             35468   596095

INTERNATIONAL BUSINESS MACHS   COM              459200101    13143   101688 SH
SOLE    01             101668        0       20
                                                              4535    35086 SH
DEFINED 01              35086        0        0
                                                        ---------- --------
                                                             17678   136774

INTERNATIONAL FLAVORS&FRAGRANC COM              459506101      265     6025 SH
SOLE    01               6025        0        0
                                                               611    13875 SH
DEFINED 01              13875        0        0
                                                        ---------- --------
                                                               876    19900

INTERPUBLIC GROUP COS INC      COM              460690100     1713    19780 SH
SOLE    01              15578        0     4202
                                                        ---------- --------
                                                              1713    19780

JEFFBANKS INC                  COM              472317106      853    30000 SH
DEFINED 01              30000        0        0
                                                        ---------- --------
                                                               853    30000

JOHNSON & JOHNSON              COM              478160104    17099   174476 SH
SOLE    01             164676      125     9675
                                                             11840   120813 SH
DEFINED 01             119913      900        0
                                                        ---------- --------
                                                             28938   295289








                                                          FORM 13F
PAGE    18 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

KEYCORP NEW                    COM              493267108      211     6574 SH
SOLE    01               6574        0        0
                                                               276     8600 SH
DEFINED 01               8600        0        0
                                                        ---------- --------
                                                               487    15174

KIMBERLY CLARK CORP            COM              494368103      558     9789 SH
SOLE    01               9789        0        0
                                                               214     3750 SH
DEFINED 01               3750        0        0
                                                        ---------- --------
                                                               772    13539

LSI LOGIC CORP                 COM              502161102      235     5100 SH
SOLE    01               5100        0        0
                                                        ---------- --------
                                                               235     5100

LANDAIR CORP                   COM              514757103     1779   444841 SH
SOLE    01             432641        0    12200
                                                        ---------- --------
                                                              1779   444841

LEGG MASON INC                 COM              524901105     3245    84298 SH
DEFINED 01              84298        0        0
                                                        ---------- --------
                                                              3245    84298

LILLY ELI & CO                 COM              532457108     5483    76555 SH
SOLE    01              74105        0     2450
                                                              2434    33985 SH
DEFINED 01              33335      650        0
                                                        ---------- --------
                                                              7917   110540

LINCOLN NATL CORP IND          COM              534187109      262     5000 SH
SOLE    01               5000        0        0
                                                               102     1944 SH
DEFINED 01               1944        0        0
                                                        ---------- --------
                                                               363     6944

LINEAR TECHNOLOGY CORP         COM              535678106     7001   104105 SH
SOLE    01              94785      200     9120
                                                               709    10550 SH
DEFINED 01              10550        0        0
                                                        ---------- --------
                                                              7711   114655

LOCKHEED MARTIN CORP           COM              539830109      487    13082 SH
SOLE    01              13082        0        0
                                                               175     4702 SH
DEFINED 01               4702        0        0
                                                        ---------- --------
                                                               662    17784

LOWES COS INC                  COM              548661107    11989   211486 SH
SOLE    01             197586      200    13700
                                                              1967    34700 SH
DEFINED 01              33390     1310        0
                                                        ---------- --------
                                                             13956   246186








                                                          FORM 13F
PAGE    19 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

LUCENT TECHNOLOGIES INC        COM              549463107    14844   220114 SH
SOLE    01             209085        0    11029
                                                              4333    64256 SH
DEFINED 01              63020     1236        0
                                                        ---------- --------
                                                             19177   284370

MBNA CORP                      COM              55262L100    17981   587130 SH
SOLE    01             537337      500    49293
                                                              5716   186629 SH
DEFINED 01             182777     3852        0
                                                        ---------- --------
                                                             23696   773759

MCI WORLDCOM INC               COM              55268B106    27693   321778 SH
SOLE    01             302328      400    19050
                                                              7183    83461 SH
DEFINED 01              82261      700      500
                                                        ---------- --------
                                                             34876   405239

MGIC INVT CORP WIS             COM              552848103      371     7638 SH
SOLE    01               3666        0     3972
                                                               145     2992 SH
DEFINED 01               2992        0        0
                                                        ---------- --------
                                                               517    10630

MANUGISTICS GROUP INC          COM              565011103      691    47676 SH
SOLE    01              47676        0        0
                                                        ---------- --------
                                                               691    47676

MARSH & MCLENNAN COS INC       COM              571748102      134     1772 SH
SOLE    01               1772        0        0
                                                               623     8229 SH
DEFINED 01               8229        0        0
                                                        ---------- --------
                                                               757    10001

MARRIOTT INTL INC NEW          CL A             571903202     1280    34258 SH
SOLE    01              34258        0        0
                                                               241     6450 SH
DEFINED 01               6450        0        0
                                                        ---------- --------
                                                              1521    40708

MARTIN MARIETTA MATLS INC      COM              573284106      100     1694 SH
SOLE    01               1694        0        0
                                                               125     2118 SH
DEFINED 01               2118        0        0
                                                        ---------- --------
                                                               225     3812

MASCO CORP                     COM              574599106     1549    53650 SH
SOLE    01              45650        0     8000
                                                        ---------- --------
                                                              1549    53650

MATTEL INC                     COM              577081102      216     8250 SH
SOLE    01               8250        0        0
                                                        ---------- --------
                                                               216     8250








                                                          FORM 13F
PAGE    20 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

MAY DEPT STORES CO             COM              577778103      266     6502 SH
SOLE    01               6502        0        0
                                                                22      540 SH
DEFINED 01                540        0        0
                                                        ---------- --------
                                                               288     7042

MCCORMICK & CO INC             COM NON VTG      579780206      600    18999 SH
SOLE    01              18909        0       90
                                                               357    11324 SH
DEFINED 01              11324        0        0
                                                        ---------- --------
                                                               957    30323

MCDONALDS CORP                 COM              580135101     2516    61185 SH
SOLE    01              60315        0      870
                                                              1818    44217 SH
DEFINED 01              42385     1832        0
                                                        ---------- --------
                                                              4335   105402

MCGRAW HILL COS INC            COM              580645109     1093    20268 SH
SOLE    01              18268        0     2000
                                                                76     1400 SH
DEFINED 01               1400        0        0
                                                        ---------- --------
                                                              1169    21668

MCKESSON HBOC INC              COM              58155Q103       23      700 SH
SOLE    01                700        0        0
                                                              2955    91800 SH
DEFINED 01              91800        0        0
                                                        ---------- --------
                                                              2977    92500

MEAD CORP                      COM              582834107      221     5300 SH
SOLE    01               5300        0        0
                                                        ---------- --------
                                                               221     5300

MEDTRONIC INC                  COM              585055106    28392   364590 SH
SOLE    01             335710      200    28680
                                                              2041    26210 SH
DEFINED 01              26210        0        0
                                                        ---------- --------
                                                             30434   390800

MELLON BK CORP                 COM              585509102      282     7740 SH
SOLE    01               7740        0        0
                                                                30      820 SH
DEFINED 01                820        0        0
                                                        ---------- --------
                                                               311     8560

MEMBERWORKS INC                COM              586002107    28817   993704 SH
SOLE    01             966204        0    27500
                                                        ---------- --------
                                                             28817   993704












                                                          FORM 13F
PAGE    21 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

MERCANTILE BANKSHARES CORP     COM              587405101     3216    90913 SH
SOLE    01              87038        0     3875
                                                              1203    34010 SH
DEFINED 01              34010        0        0
                                                        ---------- --------
                                                              4419   124923

MERCK & CO INC                 COM              589331107    29813   404936 SH
SOLE    01             385176        0    19760
                                                             18803   255393 SH
DEFINED 01             253727     1666        0
                                                        ---------- --------
                                                             48617   660329

METATEC INTL INC               COM              591398102      200    33334 SH
SOLE    01              33334        0        0
                                                        ---------- --------
                                                               200    33334

METTLER TOLEDO INTERNATIONAL   COM              592688105      288    11300 SH
SOLE    01              11300        0        0
                                                        ---------- --------
                                                               288    11300

MICROSOFT CORP                 COM              594918104    26170   290175 SH
SOLE    01             278510      150    11515
                                                              8520    94475 SH
DEFINED 01              93955      520        0
                                                        ---------- --------
                                                             34690   384650

MICROCHIP TECHNOLOGY INC       COM              595017104      201     4250 SH
SOLE    01               4250        0        0
                                                        ---------- --------
                                                               201     4250

MIDAMERICAN ENERGY HLDGS NEW   COM              59562V107     2244    64800 SH
SOLE    01              64800        0        0
                                                               184     5300 SH
DEFINED 01                  0        0     5300
                                                        ---------- --------
                                                              2427    70100

MINNESOTA MNG & MFG CO         COM              604059105      995    11443 SH
SOLE    01              11443        0        0
                                                              1688    19413 SH
DEFINED 01              19413        0        0
                                                        ---------- --------
                                                              2683    30856

MOBIL CORP                     COM              607059102    14168   143476 SH
SOLE    01             134252        0     9224
                                                              4016    40672 SH
DEFINED 01              39864      808        0
                                                        ---------- --------
                                                             18185   184148

MONSANTO CO                    COM              611662107      249     6300 SH
SOLE    01               6300        0        0
                                                                29      730 SH
DEFINED 01                730        0        0
                                                        ---------- --------
                                                               278     7030








                                                          FORM 13F
PAGE    22 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

MORGAN J P & CO INC            COM              616880100     1267     9021 SH
SOLE    01               9021        0        0
                                                              1429    10171 SH
DEFINED 01              10171        0        0
                                                        ---------- --------
                                                              2696    19192

MORGAN STANLEY DEAN WITTER&CO  COM NEW          617446448      147     1432 SH
SOLE    01               1432        0        0
                                                                63      610 SH
DEFINED 01                610        0        0
                                                        ---------- --------
                                                               210     2042

MOTOROLA INC                   COM              620076109     1656    17479 SH
SOLE    01              17479        0        0
                                                               311     3287 SH
DEFINED 01               3287        0        0
                                                        ---------- --------
                                                              1968    20766

NABORS INDS INC                COM              629568106      205     8418 SH
SOLE    01               8418        0        0
                                                        ---------- --------
                                                               205     8418

NETWORKS ASSOCS INC            COM              640938106      305    20800 SH
SOLE    01              20800        0        0
                                                        ---------- --------
                                                               305    20800

NEWELL RUBBERMAID INC          COM              651229106     8229   177447 SH
SOLE    01             164742      550    12155
                                                              1444    31139 SH
DEFINED 01              31139        0        0
                                                        ---------- --------
                                                              9673   208586

NEXTEL COMMUNICATIONS INC      CL A             65332V103     1275    25400 SH
SOLE    01              25400        0        0
                                                              1004    20000 SH
DEFINED 01              20000        0        0
                                                        ---------- --------
                                                              2278    45400

NIKE INC                       CL B             654106103      257     4050 SH
SOLE    01               4000        0       50
                                                               112     1760 SH
DEFINED 01               1760        0        0
                                                        ---------- --------
                                                               368     5810

NOKIA CORP                     SPONSORED ADR    654902204      330     3600 SH
SOLE    01               3600        0        0
                                                                55      600 SH
DEFINED 01                600        0        0
                                                        ---------- --------
                                                               385     4200












                                                          FORM 13F
PAGE    23 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

NORFOLK SOUTHERN CORP          COM              655844108      451    14960 SH
SOLE    01              14960        0        0
                                                               624    20727 SH
DEFINED 01              20727        0        0
                                                        ---------- --------
                                                              1075    35687

NOVA CORP GA                   COM              669784100      248     9900 SH
SOLE    01               9900        0        0
                                                        ---------- --------
                                                               248     9900

NOVADIGM INC                   COM              669937104     1000   116000 SH
SOLE    01             113225        0     2775
                                                        ---------- --------
                                                              1000   116000

NOVELL INC                     COM              670006105      636    24000 SH
SOLE    01              24000        0        0
                                                        ---------- --------
                                                               636    24000

NUVEEN INSD PREM INCOME MUN 2  COM              6706D8104      140    11000 SH
SOLE    01              11000        0        0
                                                        ---------- --------
                                                               140    11000

NUVEEN PREM INCOME MUN FD 4    COM              6706K4105      183    13000 SH
SOLE    01              13000        0        0
                                                        ---------- --------
                                                               183    13000

O CHARLEYS INC                 COM              670823103    30327  1895440 SH
SOLE    01            1842690        0    52750
                                                        ---------- --------
                                                             30327  1895440

NUVEEN MUN VALUE FD INC        COM              670928100      222    24177 SH
SOLE    01              24177        0        0
                                                                61     6600 SH
DEFINED 01               6600        0        0
                                                        ---------- --------
                                                               283    30777

NUVEEN PA INVT QUALITY MUN FD  COM              670972108      279    16700 SH
SOLE    01              16700        0        0
                                                        ---------- --------
                                                               279    16700

OMNICOM GROUP INC              COM              681919106      200     2500 SH
SOLE    01               2500        0        0
                                                               128     1600 SH
DEFINED 01               1600        0        0
                                                        ---------- --------
                                                               328     4100












                                                          FORM 13F
PAGE    24 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

ORACLE CORP                    COM              68389X105     9929   267454 SH
SOLE    01             249644      200    17610
                                                              1058    28485 SH
DEFINED 01              28485        0        0
                                                        ---------- --------
                                                             10987   295939

PE CORP                        COM PE BIO GRP   69332S102      472     4114 SH
SOLE    01               4114        0        0
                                                               184     1600 SH
DEFINED 01               1600        0        0
                                                        ---------- --------
                                                               656     5714

PPG INDS INC                   COM              693506107     5740    97189 SH
SOLE    01              87219      150     9820
                                                               523     8860 SH
DEFINED 01               8860        0        0
                                                        ---------- --------
                                                              6263   106049

PSS WORLD MED INC              COM              69366A100    27777  2482937 SH
SOLE    01            2414487        0    68450
                                                        ---------- --------
                                                             27777  2482937

PACIFIC GATEWAY EXCHANGE INC   COM              694327107    26998   926971 SH
SOLE    01             901421        0    25550
                                                                29     1000 SH
DEFINED 01                  0        0     1000
                                                        ---------- --------
                                                             27027   927971

PAPA JOHNS INTL INC            COM              698813102    24676   552206 SH
SOLE    01             536756        0    15450
                                                        ---------- --------
                                                             24676   552206

PARAMETRIC TECHNOLOGY CORP     COM              699173100     5539   399240 SH
SOLE    01             376865     1000    21375
                                                               199    14370 SH
DEFINED 01              14370        0        0
                                                        ---------- --------
                                                              5739   413610

PAYCHEX INC                    COM              704326107      795    24933 SH
SOLE    01              24933        0        0
                                                        ---------- --------
                                                               795    24933

PEAPOD INC                     COM              704718105      332    41800 SH
SOLE    01              41800        0        0
                                                                42     5300 SH
DEFINED 01                  0        0     5300
                                                        ---------- --------
                                                               374    47100

PENNEY J C INC                 COM              708160106      361     7427 SH
SOLE    01               7427        0        0
                                                               856    17632 SH
DEFINED 01              17632        0        0
                                                        ---------- --------
                                                              1217    25059








                                                          FORM 13F
PAGE    25 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

PENTAIR INC                    COM              709631105     2801    61224 SH
SOLE    01              51674      250     9300
                                                                69     1500 SH
DEFINED 01               1500        0        0
                                                        ---------- --------
                                                              2870    62724

PEPSICO INC                    COM              713448108    14818   383032 SH
SOLE    01             357452      300    25280
                                                              4398   113682 SH
DEFINED 01             112132     1550        0
                                                        ---------- --------
                                                             19216   496714

PERCLOSE INC                   COM              71361C107    36980   769429 SH
SOLE    01             748529        0    20900
                                                        ---------- --------
                                                             36980   769429

PETSMART INC                   COM              716768106    16809  1639855 SH
SOLE    01            1593905        0    45950
                                                        ---------- --------
                                                             16809  1639855

PFIZER INC                     COM              717081103    11010   101005 SH
SOLE    01              83095        0    17910
                                                              9262    84975 SH
DEFINED 01              84975        0        0
                                                        ---------- --------
                                                             20272   185980

PHILIP MORRIS COS INC          COM              718154107     9502   236453 SH
SOLE    01             231453        0     5000
                                                               221     5500 SH
DEFINED 01               5500        0        0
                                                        ---------- --------
                                                              9723   241953

PHILLIPS PETE CO               COM              718507106      105     2094 SH
SOLE    01               2094        0        0
                                                               348     6919 SH
DEFINED 01               6919        0        0
                                                        ---------- --------
                                                               453     9013

PINNACLE WEST CAP CORP         COM              723484101      962    23900 SH
SOLE    01              22200        0     1700
                                                               235     5840 SH
DEFINED 01               5840        0        0
                                                        ---------- --------
                                                              1197    29740

PITNEY BOWES INC               COM              724479100      150     2339 SH
SOLE    01               2339        0        0
                                                               307     4777 SH
DEFINED 01               4777        0        0
                                                        ---------- --------
                                                               457     7116












                                                          FORM 13F
PAGE    26 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

PRAXAIR INC                    COM              74005P104     3885    79387 SH
SOLE    01              71577        0     7810
                                                               240     4900 SH
DEFINED 01               4900        0        0
                                                        ---------- --------
                                                              4125    84287

PRICE T ROWE & ASSOCIATES      COM              741477103      904    23545 SH
SOLE    01              19245        0     4300
                                                               461    12025 SH
DEFINED 01              12025        0        0
                                                        ---------- --------
                                                              1365    35570

PROCTER & GAMBLE CO            COM              742718109     6430    72042 SH
SOLE    01              70942        0     1100
                                                              6180    69241 SH
DEFINED 01              68561      680        0
                                                        ---------- --------
                                                             12610   141283

PROTECTIVE LIFE CORP           COM              743674103     3083    90669 SH
SOLE    01              90669        0        0
                                                               149     4392 SH
DEFINED 01               4392        0        0
                                                        ---------- --------
                                                              3232    95061

QRS CORP                       COM              74726X105    95487  1224194 SH
SOLE    01            1190869        0    33325
                                                        ---------- --------
                                                             95487  1224194

QUALCOMM INC                   COM              747525103     2597    18100 SH
SOLE    01              18100        0        0
                                                        ---------- --------
                                                              2597    18100

R H DONNELLEY CORP             COM NEW          74955W307      315    16116 SH
DEFINED 01              13816        0     2300
                                                        ---------- --------
                                          315  16116

RWD TECHNOLOGIES INC           COM              749927109     4843   615770 SH
SOLE    01             615770        0        0
                                                        ---------- --------
                                                              4843   615770

RAILWORKS CORP                 COM              750789109     3461   374125 SH
SOLE    01             363625        0    10500
                                                        ---------- --------
                                                              3461   374125

RATIONAL SOFTWARE CORP         COM NEW          75409P202     2469    74950 SH
SOLE    01              74950        0        0
                                                               438    13300 SH
DEFINED 01                  0        0    13300
                                                        ---------- --------
                                                              2907    88250

RAYTHEON CO                    CL B             755111408      337     4782 SH
SOLE    01               4782        0        0
                                                               251     3560 SH
DEFINED 01               3560        0        0
                                                        ---------- --------
                                                               588     8342









                                                          FORM 13F
PAGE    27 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

REYNOLDS METALS CO             COM              761763101     3579    60661 SH
DEFINED 01              60661        0        0
                                                        ---------- --------
                                                              3579    60661

ROHM & HAAS CO                 COM              775371107      418     9750 SH
SOLE    01               9750        0        0
                                                                 7      164 SH
DEFINED 01                164        0        0
                                                        ---------- --------
                                                               425     9914

ROSS STORES INC                COM              778296103      584    11600 SH
SOLE    01              11600        0        0
                                                        ---------- --------
                                                               584    11600

ROUSE CO                       COM              779273101     2016    79449 SH
SOLE    01              79449        0        0
                                                               317    12500 SH
DEFINED 01              12500        0        0
                                                        ---------- --------
                                                              2333    91949

ROYAL DUTCH PETE CO            NY REG GLD1.25   780257804     2552    42365 SH
SOLE    01              42365        0        0
                                                                84     1400 SH
DEFINED 01               1400        0        0
                                                        ---------- --------
                                                              2637    43765

SBC COMMUNICATIONS INC         COM              78387G103    16965   292494 SH
SOLE    01             272229      150    20115
                                                              3554    61280 SH
DEFINED 01              60220     1060        0
                                                        ---------- --------
                                                             20519   353774

SBA COMMUNICATIONS CORP        COM              78388J106      199    20500 SH
SOLE    01              20500        0        0
                                                        ---------- --------
                                                               199    20500

ST JOE CO                      COM              790148100      227     8400 SH
SOLE    01               8400        0        0
                                                        ---------- --------
                                                               227     8400

SANDY SPRING BANCORP INC       COM              800363103      352    12692 SH
DEFINED 01              12692        0        0
                                                        ---------- --------
                                                               352    12692

SARA LEE CORP                  COM              803111103      734    32356 SH
SOLE    01              32356        0        0
                                                               299    13200 SH
DEFINED 01              13200        0        0
                                                        ---------- --------
                                                              1034    45556










                                                          FORM 13F
PAGE    28 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

SCHERING PLOUGH CORP           COM              806605101     4346    82777 SH
SOLE    01              81077        0     1700
                                                              7708   146818 SH
DEFINED 01             146818        0        0
                                                        ---------- --------
                                                             12054   229595

SCHLUMBERGER LTD               COM              806857108     1886    29612 SH
SOLE    01              29612        0        0
                                                               789    12388 SH
DEFINED 01              12388        0        0
                                                        ---------- --------
                                                              2675    42000

SCHWAB CHARLES CORP NEW        COM              808513105     2451    22490 SH
SOLE    01              22490        0        0
                                                        ---------- --------
                                                              2451    22490

SERVICEMASTER CO               COM              81760N109      392    20902 SH
SOLE    01              20902        0        0
                                                        ---------- --------
                                                               392    20902

SIGMA ALDRICH CORP             COM              826552101      524    15220 SH
SOLE    01              15220        0        0
                                                               138     4000 SH
DEFINED 01               4000        0        0
                                                        ---------- --------
                                                               662    19220

SILICON GRAPHICS INC           COM              827056102      188    11500 SH
SOLE    01              11500        0        0
                                                        ---------- --------
                                                               188    11500

SIPEX CORP                     COM              829909100    33117  1615445 SH
SOLE    01            1572595        0    42850
                                                        ---------- --------
                                                             33117  1615445

SKYTEL COMMUNICATIONS INC      COM              83087Q104     1153    55090 SH
SOLE    01              55090        0        0
                                                        ---------- --------
                                                              1153    55090

SMITHKLINE BEECHAM PLC         ADR REP ORD      832378301     3231    48916 SH
SOLE    01              48916        0        0
                                                                37      556 SH
DEFINED 01                556        0        0
                                                        ---------- --------
                                                              3268    49472

SONY CORP                      ADR NEW          835699307      221     2000 SH
DEFINED 01               2000        0        0
                                                        ---------- --------
                                                               221     2000











                                                          FORM 13F
PAGE    29 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

SOUTHERN CO                    COM              842587107      356    13430 SH
SOLE    01              13430        0        0
                                                                21      800 SH
DEFINED 01                800        0        0
                                                        ---------- --------
                                                               377    14230

SPEEDFAM INTERNATIONAL         COM              847705100     1027    99720 SH
DEFINED 01              99720        0        0
                                                        ---------- --------
                                                              1027    99720

SPRINT CORP                    COM FON GROUP    852061100      493     9300 SH
SOLE    01               7700        0     1600
                                                               297     5600 SH
DEFINED 01               5600        0        0
                                                        ---------- --------
                                                               790    14900

SPRINT CORP                    PCS COM SER 1    852061506      118     2075 SH
SOLE    01               1675        0      400
                                                                88     1550 SH
DEFINED 01               1550        0        0
                                                        ---------- --------
                                                               207     3625

STAPLES INC                    COM              855030102     1858    60042 SH
SOLE    01              60042        0        0
                                                        ---------- --------
                                                              1858    60042

STARBUCKS CORP                 COM              855244109    29200   777387 SH
SOLE    01             755887        0    21500
                                                        ---------- --------
                                                             29200   777387

STATE STR CORP                 COM              857477103     1588    18597 SH
SOLE    01              14997        0     3600
                                                        ---------- --------
                                                              1588    18597

STERLING COMM INC              COM              859205106      478    13000 SH
SOLE    01              13000        0        0
                                                        ---------- --------
                                                               478    13000

STONERIDGE INC                 COM              86183P102      591    34771 SH
OTHER   01                  0        0    34771
                                                        ---------- --------
                                                               591    34771

SUN MICROSYSTEMS INC           COM              866810104     1223    17760 SH
SOLE    01              17670        0       90
                                                               207     3000 SH
DEFINED 01               3000        0        0
                                                        ---------- --------
                                                              1430    20760

SUNRISE ASSISTED LIVING INC    COM              86768K106    35957  1031030 SH
SOLE    01            1002480        0    28550
                                                        ---------- --------
                                                             35957  1031030

SUNTRUST BKS INC               COM              867914103      803    11561 SH
SOLE    01               7561        0     4000
                                                               187     2700 SH
DEFINED 01               2700        0        0
                                                        ---------- --------
                                                               990    14261










                                                          FORM 13F
PAGE    30 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

SUPERVALU INC                  COM              868536103     1087    41991 SH
SOLE    01              41991        0        0
                                                        ---------- --------
                                                              1087    41991

SYLVAN LEARNING SYS INC        COM              871399101    47412  1743924 SH
SOLE    01            1697724        0    46200
                                                               218     8025 SH
DEFINED 01                  0        0     8025
                                                        ---------- --------
                                                             47630  1751949

SYNOPSYS INC                   COM              871607107    44930   814144 SH
SOLE    01             792144        0    22000
                                                        ---------- --------
                                                             44930   814144

SYSCO CORP                     COM              871829107      480    16110 SH
SOLE    01              16110        0        0
                                                                83     2800 SH
DEFINED 01               2800        0        0
                                                        ---------- --------
                                                               564    18910

TJX COS INC NEW                COM              872540109      213     6400 SH
SOLE    01               6400        0        0
                                                        ---------- --------
                                                               213     6400

TELEFLEX INC                   COM              879369106      430     9900 SH
SOLE    01               9900        0        0
                                                        ---------- --------
                                                               430     9900

TELEPHONE & DATA SYS INC       COM              879433100      580     7932 SH
SOLE    01               7932        0        0
                                                        ---------- --------
                                                               580     7932

TELETECH HOLDINGS INC          COM              879939106      405    40000 SH
SOLE    01              40000        0        0
                                                        ---------- --------
                                                               405    40000

TETRA TECH INC                 COM              88162G103    32015  1918428 SH
SOLE    01             441679        0  1476748
                                                        ---------- --------
                                                             32015  1918428

TEXACO INC                     COM              881694103     1101    17645 SH
SOLE    01              17245        0      400
                                                               370     5926 SH
DEFINED 01               5926        0        0
                                                        ---------- --------
                                                              1470    23571

TEXAS INSTRS INC               COM              882508104    15716   109140 SH
SOLE    01             101365        0     7775
                                                              1957    13590 SH
DEFINED 01              13590        0        0
                                                        ---------- --------
                                                             17673   122730











                                                          FORM 13F
PAGE    31 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

TIME WARNER INC                COM              887315109      202     2780 SH
SOLE    01               2780        0        0
                                                        ---------- --------
                                                               202     2780

TOP SOURCE TECHNOLOGIES INC    COM              890530108       93    87700 SH
SOLE    01              87700        0        0
                                                        ---------- --------
                                                                93    87700

TRANSACTION SYS ARCHITECTS     CL A             893416107      285     7300 SH
SOLE    01               7300        0        0
                                                        ---------- --------
                                                               285     7300

TREX INC                       COM              89531P105     6518   256870 SH
SOLE    01             249720        0     7150
                                                        ---------- --------
                                                              6518   256870

TRIBUNE CO NEW                 COM              896047107      558     6400 SH
DEFINED 01               6400        0        0
                                                        ---------- --------
                                                               558     6400

TYCO INTL LTD NEW              COM              902124106    17960   189548 SH
SOLE    01             172070        0    17478
                                                              2180    23005 SH
DEFINED 01              23005        0        0
                                                        ---------- --------
                                                             20139   212553

UNILEVER N V                   N Y SHS NEW      904784709       59      847 SH
SOLE    01                847        0        0
                                                               778    11159 SH
DEFINED 01              11159        0        0
                                                        ---------- --------
                                                               837    12006

UNION PAC CORP                 COM              907818108      419     7180 SH
SOLE    01               7180        0        0
                                                               254     4350 SH
DEFINED 01               4350        0        0
                                                        ---------- --------
                                                               672    11530

UNITED TECHNOLOGIES CORP       COM              913017109      148     2050 SH
SOLE    01               2050        0        0
                                                               547     7600 SH
DEFINED 01               7600        0        0
                                                        ---------- --------
                                                               695     9650

VEECO INSTRS INC DEL           COM              922417100      292     8600 SH
SOLE    01               8600        0        0
                                                        ---------- --------
                                                               292     8600











                                                          FORM 13F
PAGE    32 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

VICOR CORP                     COM              925815102     2082    98250 SH
SOLE    01              98250        0        0
                                                               178     8400 SH
DEFINED 01                  0        0     8400
                                                        ---------- --------
                                                              2260   106650

VITESSE SEMICONDUCTOR CORP     COM              928497106     2556    37900 SH
SOLE    01              37900        0        0
                                                        ---------- --------
                                                              2556    37900

VODAFONE GROUP PLC             SPONSORED ADR    92857T107     1449     7354 SH
SOLE    01               6804        0      550
                                                               327     1658 SH
DEFINED 01               1658        0        0
                                                        ---------- --------
                                                              1775     9012

WACHOVIA CORP                  COM              929771103      821     9600 SH
SOLE    01               9600        0        0
                                                               150     1756 SH
DEFINED 01               1756        0        0
                                                        ---------- --------
                                                               972    11356

WAL MART STORES INC            COM              931142103     4459    92408 SH
SOLE    01              92408        0        0
                                                               786    16300 SH
DEFINED 01              16300        0        0
                                                        ---------- --------
                                                              5245   108708

WARNER LAMBERT CO              COM              934488107    11204   162080 SH
SOLE    01             158530        0     3550
                                                              3673    53137 SH
DEFINED 01              53137        0        0
                                                        ---------- --------
                                                             14877   215217

WASHINGTON POST CO             CL B             939640108      108      200 SH
SOLE    01                200        0        0
                                                               108      200 SH
DEFINED 01                200        0        0
                                                        ---------- --------
                                                               215      400

WASTE MGMT INC DEL             COM              94106L109      539    10021 SH
SOLE    01              10021        0        0
                                                        ---------- --------
                                                               539    10021

WELLPOINT HEALTH NETWORK NEW   COM              94973H108      280     3300 SH
SOLE    01               3300        0        0
                                                        ---------- --------
                                                               280     3300

WELLS FARGO & CO NEW           COM              949746101    13086   306102 SH
SOLE    01             284122      300    21680
                                                              2793    65330 SH
DEFINED 01              65330        0        0
                                                        ---------- --------
                                                             15879   371432








                                                          FORM 13F
PAGE    33 OF    33                  NAME OF REPORTING MANAGER:BROWN INVESTMENT
ADVISORY & TRUST CO                  AS OF 09/30/99
                                                           VALUE   SHARES/  SH/
PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER         TITLE OF CLASS     CUSIP   (X$1000) PRN AMT  PRN
CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- - - ------------------------------ ---------------- --------- -------- -------- ---
- - - ---- ------- ------------ -------- -------- --------

WESTVACO CORP                  COM              961548104      197     6777 SH
SOLE    01               6777        0        0
                                                                52     1800 SH
DEFINED 01               1800        0        0
                                                        ---------- --------
                                                               249     8577

WHITE MTNS INS GROUP INC       COM              964126106      226     1600 SH
SOLE    01               1600        0        0
                                                        ---------- --------
                                                               226     1600

WHOLE FOODS MKT INC            COM              966837106      344     7150 SH
SOLE    01               7150        0        0
                                                        ---------- --------
                                                               344     7150

WILLIAMS COS INC DEL           COM              969457100      272     6400 SH
SOLE    01               6400        0        0
                                                        ---------- --------
                                                               272     6400

WILMAR INDS INC                COM              971426101    16642  1280156 SH
SOLE    01            1244556        0    35600
                                                        ---------- --------
                                                             16642  1280156

XEIKON N V                     SPONSORED ADR    984003103      374    16450 SH
SOLE    01              16450        0        0
                                                        ---------- --------
                                                               374    16450

XEROX CORP                     COM              984121103      969    16406 SH
SOLE    01              16406        0        0
                                                               112     1900 SH
DEFINED 01               1900        0        0
                                                        ---------- --------
                                                              1081    18306

ZEMEX CDA CORP                 COM              988910105      341    53959 SH
SOLE    01              53959        0        0
                                                        ---------- --------
                                                               341    53959


                  GRAND TOTAL                              2313415   TOTAL
ENTRIES            521





















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