ATMI INC
10-Q, 1997-11-14
GENERAL INDUSTRIAL MACHINERY & EQUIPMENT, NEC
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                                        1


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 10-Q


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


For the quarterly period ended September 30, 1997


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


For the transition period from __________ to  __________


Commission file Number: 0-22756


                                   ATMI, Inc.
             (Exact name of registrant as specified in its charter)


           Delaware                                      06-1481060
 (State or other jurisdiction of            (I.R.S. Employer Identification No.)
  incorporation or organization)


     7 Commerce Drive, Danbury, CT                                    06810
(Address of principal executive offices)                           (Zip Code)



                                  203-794-1100
              (Registrant's telephone number, including area code)



     

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

     The number of shares  outstanding  of the  registrant's  common stock as of
October 31, 1997 was 18,101,898.


<PAGE>
                                   ATMI, INC.
                          Quarterly Report on Form 10-Q
                    For the Quarter Ended September 30, 1997

                                TABLE OF CONTENTS
                                                                           Page
Part I - Financial Information

Item 1.         Financial Statements

     Consolidated Balance Sheet...............................................3

     Consolidated Statement of Operations.....................................4

     Consolidated Statement of Cash Flows.....................................6

     Notes to Consolidated Interim Financial Statements.......................7

Item 2.         Management's Discussion and Analysis of Financial
                Condition and Results of Operations..........................10

Item 3.         Quantitative and Qualitative Disclosures about Market Risk...14

Part II - Other Information

Item 5.         Other Information............................................15

     Pro Forma Condensed Combined Balance Sheet..............................16

     Pro Forma Condensed Combined Statement of Operations....................17

     Notes to Pro Forma Combined Financial Statements........................22


Item 6.         Exhibits and Reports on Form 8-K.............................23



Signatures...................................................................24


<PAGE>
PART I - FINANCIAL INFORMATION
Item 1. Financial Statements
<TABLE>
<CAPTION>
                       Advanced Technology Materials, Inc.
                           Consolidated Balance Sheet


                                                  September 30,     December 31,
                                                      1997               1996
                                                   -----------       -----------
                                                   (unaudited)              
<S>                                                 <C>              <C>                                                      
Assets                    
Current assets:
Cash and cash equivalents ....................      $ 2,319,838      $ 4,437,015
Marketable securities ........................       15,828,954       16,969,073
Accounts receivable, net of allowance
 for doubtful accounts of $204,458 in
 1997 and $141,504 in 1996 ...................       12,258,232        9,377,777
Inventories ..................................        5,355,484        4,541,282
Other ........................................        3,007,176          500,324
                                                      ---------          -------                                                   
Total current assets .........................       38,769,684       35,825,471

Property and equipment, net ..................        9,378,428        8,102,218

Long-term investment .........................        1,250,003        1,000,000
Goodwill and other intangibles ...............        5,119,895        5,190,758
                                                      ---------        ---------
                                                    $54,518,010      $50,118,447
                                                    ===========      ===========

Liabilities and stockholders' equity
Current liabilities:
Accounts payable .................................   $ 2,364,441   $  3,469,530
Accrued expenses .................................     2,063,965      1,996,587
Accrued commissions ..............................     1,940,470      1,378,888
Accrued payroll and benefits .....................       977,134        465,280
Notes payable ....................................       619,184        621,463
Other ............................................     1,123,686        790,261
                                                       ---------        -------
Total current liabilities ........................     9,088,880      8,722,009

Notes payable, less current portion ..............     4,507,070      4,944,517
Other long-term liabilities ......................        56,324         59,382


Stockholders' equity:
    Preferred stock, par value $.01:
      1,000,000 shares authorized; none issued
      and outstanding ............................             -              -
    Common stock, par value $.01: 15,000,000
      shares authorized; issued
      8,838,655 in 1997 and 8,775,810 in 1996 ....        88,387         87,758
    Additional paid-in capital ...................    37,727,492     37,234,277
    Retained earnings (accumulated deficit) ......     3,049,857       (929,496)
                                                       ---------       --------
Total stockholders' equity .......................    40,865,736     36,392,539
                                                      ----------     ----------
                                                     $54,518,010   $ 50,118,447
                                                     ===========   ============
</TABLE>
See accompanying notes.

<PAGE>
                       Advanced Technology Materials, Inc.
                      Consolidated Statement of Operations
                                   (unaudited)

<TABLE>
<CAPTION>
                                                Three months ended September 30,
                                                     1997               1996
                                                     ----               ----
<S>                                              <C>               <C>
Revenues:
   Product revenues ........................     $ 12,968,047      $  9,361,238
   Contract revenues .......................        2,220,193         2,783,966
                                                    ---------         ---------
Total revenues .............................       15,188,240        12,145,204
Cost of revenues:
   Cost of product revenues ................        5,360,956         3,956,454
   Cost of contract revenues ...............        1,935,485         2,402,663
                                                    ---------         ---------
Total cost of revenues .....................        7,296,441         6,359,117
                                                    ---------         ---------
Gross profit ...............................        7,891,799         5,786,087

Operating expenses:
   Research and development ................        2,320,242         1,648,901
   Selling, general, and administrative ....        3,646,580         3,224,417
                                                    ---------         ---------
                                                    5,966,822         4,873,318
                                                    ---------         ---------
Operating income ...........................        1,924,977           912,769

Interest income ............................          280,569           276,851
Interest expense ...........................         (103,986)         (124,983)
                                                     --------          -------- 
Income before taxes ........................        2,101,560         1,064,637

Income taxes ...............................          568,372            90,019
                                                      -------            ------

Net income .................................     $  1,533,188      $    974,618
                                                 ============      ============

Net income per share .......................     $       0.16      $       0.10
                                                 ------------      ------------

Weighted average shares outstanding ........        9,741,879         9,375,964
                                                 ============      ============

</TABLE>
See accompanying notes.

<PAGE>

                       Advanced Technology Materials, Inc.
                      Consolidated Statement of Operations
                                   (unaudited)
<TABLE>
<CAPTION>

                                                Nine months ended September 30,
                                                      1997              1996
                                                      ----              ----
<S>                                              <C>               <C>
Revenues:
   Product revenues ........................     $ 34,165,363      $ 27,104,746
   Contract revenues .......................        7,120,843         7,478,717
                                                    ---------         ---------
Total revenues .............................       41,286,206        34,583,463
Cost of revenues:
   Cost of product revenues ................       14,690,618        11,563,699
   Cost of contract revenues ...............        5,974,430         6,331,271
                                                    ---------         ---------
Total cost of revenues .....................       20,665,048        17,894,970
                                                   ----------        ----------
Gross profit ...............................       20,621,158        16,688,493

Operating expenses:
   Research and development ................        6,432,348         5,697,116
   Selling, general, and administrative ....        9,835,484         9,144,365
                                                    ---------         ---------
                                                   16,267,832        14,841,481
                                                   ----------        ----------
Operating income ...........................        4,353,326         1,847,012

Interest income ............................          835,750           826,777
Interest expense ...........................         (309,414)         (387,684)
                                                     --------          --------
Income before taxes ........................        4,879,662         2,286,105

Income taxes ...............................          900,309           201,593
                                                      -------           -------

Net income .................................     $  3,979,353      $  2,084,512
                                                 ============      ============

Net income per share .......................     $       0.41      $       0.22
                                                 ------------      ------------

Weighted average shares outstanding ........        9,632,741         9,362,307
                                                    =========         =========

</TABLE>
See accompanying notes.


<PAGE>

                       Advanced Technology Materials, Inc.
                      Consolidated Statement of Cash Flows
                                   (unaudited)
<TABLE>
<CAPTION>

                                                 Nine months ended September 30,
                                                      1997           1996
                                                      ----           ----
<S>                                                <C>            <C>
Operating activities
Net income .....................................   $ 3,979,353    $ 2,084,512
Adjustments to reconcile net income
   to net cash (used) provided
   by operating activities:
     Depreciation and amortization .............     1,919,700      1,745,116
     Changes in operating assets and liabilities
        Increase in accounts receivable ........    (2,880,455)    (1,217,488)
        Increase in inventory ..................      (814,202)    (1,522,235)
        Increase in other assets ...............    (2,653,434)      (156,514)
        Decrease in accounts payable ...........    (1,105,089)        (9,597)
        Increase in accrued expenses ...........     1,140,814      1,745,059
        Increase in other liabilities ..........       330,367        233,562
                                                   -----------    -----------
Total adjustments ..............................    (4,062,299)       817,903
                                                    ----------        -------
Net cash (used) provided by operating activities       (82,946)     2,902,415
                                                       -------      ---------

Investing activities
Capital expenditures ...........................    (2,978,465)    (3,243,346)
Long term investment ...........................      (250,003)          --
Sale of marketable securities ..................     1,140,119      4,994,822
                                                   -----------    -----------
Net cash (used) provided by investing activities    (2,088,349)     1,751,476
                                                    ----------      ---------

Financing activities
Proceeds from issuance of notes payable ........             -        727,217
Principal payments on notes payable ............      (439,726)    (4,579,975)
Proceeds from the exercise of stock options ....       493,844         38,819
                                                       -------         ------
Net cash provided (used) by financing activities        54,118     (3,813,939)
                                                        ------     ----------

Net (decrease) increase in cash
   and cash equivalents ........................    (2,117,177)       839,952
Cash and cash equivalents, beginning
   of period ...................................     4,437,015      3,609,265
                                                   -----------    -----------                                                 
Cash and cash equivalents, end of period .......   $ 2,319,838    $ 4,449,217
                                                   ===========    ===========

</TABLE>
See accompanying notes.


<PAGE>
                       Advanced Technology Materials, Inc.
               Notes To Consolidated Interim Financial Statements
                                   (unaudited)

1. Basis of Presentation

     On  October  10,  1997,  as part of the  consummation  of the  transactions
described  in Note 5 below,  Advanced  Technology  Materials,  Inc.  underwent a
reorganization involving the creation of a new holding company (ATMI, Inc. - the
successor  registrant  of  Advanced  Technology  Materials,  Inc.) by means of a
merger resulting in the prior  registrant  becoming a wholly owned subsidiary of
the holding company. The accompanying unaudited interim financial statements are
those of Advanced Technology Materials, Inc. ("ATM") the registrant prior to the
reorganization  and have been prepared in accordance  with the  instructions  to
Form  10-Q  and Rule  10.01  of  Regulation  S-X and do not  include  all of the
financial  information and disclosures required by generally accepted accounting
principles.

     In the opinion of the management of ATMI,  Inc.  ("ATMI" or the "Company"),
the successor registrant to ATM, the financial  information contained herein has
been prepared on the same basis as the audited Consolidated Financial Statements
contained in ATM's Form 10-K for the year ended  December 31, 1996, and includes
adjustments  (consisting  only of normal  recurring  adjustments)  necessary  to
present fairly the unaudited quarterly results set forth herein. ATM's quarterly
results have, in the past, been subject to fluctuation  and, thus, the operating
results for any quarter are not necessarily indicative of results for any future
fiscal period.

2. Per Share Data

     Earnings per common share is computed using the treasury stock method based
on  the  weighted  average  number  of  common  and  common   equivalent  shares
outstanding  during the period.  Shares from the assumed exercise of options and
warrants  granted by ATM have been included in the  computation  of earnings per
share for all periods, unless their inclusion would be antidilutive.

     In February 1997, the Financial Accounting Standards Board issued Statement
No. 128,  Earnings  per Share,  which is required to be adopted on December  31,
1997. This Statement  simplifies the computation of earnings per share and makes
the   computation   more  consistent   with  those  of  other   countries.   The
implementation  will require the  disclosure  of basic and diluted  earnings per
share.  The Company will adopt this Statement during the fourth quarter of 1997.
Pro forma basic earnings per share under the new  computation  are $.17 and $.45
for the three months and nine months ended September 30, 1997, respectively.

3. Inventories

Inventories are comprised of the following:
<TABLE>
<CAPTION>
                        September 30,   December 31,
                            1997            1996
                            ----            ----
<S>                    <C>            <C>
Raw materials ......   $ 4,574,609    $ 4,143,818
Work in process ....     1,228,593        686,898
Finished goods .....       295,606        369,846
                           -------        -------
                         6,098,808      5,200,562
Obsolescence reserve      (743,324)      (659,280)
                          --------       --------
                       $ 5,355,484    $ 4,541,282
                       ===========    ===========
</TABLE>
4. Income taxes

     ATM's income tax expense relates to federal taxes and state taxes on income
generated,  partially  offset  by the  utilization  of  loss  carryforwards  and
available  state tax  credits.  Federal  taxes in 1997  relate to income  earned
primarily in the third quarter of 1997.  Prior to the third quarter of 1997, ATM
had utilized  substantially all of its federal net operating loss  carryforwards
to offset taxable  income.  Minimal  federal taxes in 1996 relate to alternative
minimum taxes arising from the use of net operating loss carryforwards.

5. Mergers and Acquisitions

     On  October  10,  1997,  pursuant  to an  Agreement  and Plan of Merger and
Exchange dated April 7, 1997 (the "Merger and Exchange Agreement"),  the Company
issued 5,468,747 of its Common Stock in exchange for all the ownership interests
of Advanced  Delivery & Chemical  Systems  Nevada,  Inc. and its affiliates (the
"ADCS  Group").  The ADCS Group  manufactures,  markets,  and designs  ultrahigh
purity  specialty  thin film  materials and related  delivery  equipment for the
semiconductor and semiconductor equipment manufacturing industries.  The Company
is continuing the business of the ADCS Group and integrating  its  semiconductor
thin film and delivery  systems  product lines of the NovaMOS  division into the
ADCS business.

     In order to  accomplish  the tax-free and pooling of interest  treatment of
the  transaction  contemplated  by the Merger and Exchange  Agreement,  Advanced
Technology Materials,  Inc. underwent a reorganization involving the creation of
a new  holding  company  (ATMI,  Inc. - the  successor  registrant  of  Advanced
Technology  Materials,  Inc.)  by  means  of a  merger  resulting  in the  prior
registrant becoming a wholly-owned  subsidiary of the holding company.  Pursuant
to the  reorganization,  each  outstanding  share of  common  stock of  Advanced
Technology Materials,  Inc. was converted into one share of the Company's Common
Stock. The  reorganization  is intended to be a tax-free  transaction  under the
Internal  Revenue Code of 1986, as amended (the  "Code"),  and will be accounted
for as a pooling of interests.

     Also on October  10,  1997,  pursuant to an  Agreement  and Plan of Merger,
dated as of May 17, 1997,  as amended (the  "Lawrence  Merger  Agreement"),  the
Company issued  3,628,571  shares of the Company's  Common Stock in exchange for
all of the outstanding common stock of Lawrence Semiconductor Laboratories, Inc.
("LSL")  in a  merger  transaction.  As a  result,  LSL  became  a  wholly-owned
subsidiary of the Company.  The amount of shares issued in connection  with this
merger may be subject to adjustment based on the change in the net book value of
LSL since  December 31, 1996.  LSL is an outsourcer  of epitaxial  processing of
silicon  wafers using  chemical  vapor  deposition  technology  to meet customer
specifications.  The Company is continuing the business of LSL by integrating it
with the  Epitronics  division  of the  Company  which  develops,  manufactures,
distributes  and sells  high  performance  substrates  and thin film  deposition
services to the semiconductor industry.

     The acquisition of LSL is also intended to be a tax-free  transaction under
the Code and will be accounted for as a pooling of interests.

     As  of  September  30,  1997,  approximately  $2,600,000  of  non-recurring
transaction  costs have been  classified  on the balance  sheet as other current
assets.  This amount will be expensed,  as part of  approximately  $9,000,000 of
non-recurring  costs,  as a one-time charge in the fourth quarter in conjunction
with the October closing of the transactions.


<PAGE>
5. Mergers and Acquisitions (continued)

     The pro forma unaudited  results of operations of the Company for the three
and nine months  ended  September  30, 1997 and 1996 (see Part II Item 5 for pro
forma  condensed  combined  financial  statements),   assuming  the  pooling  of
interests of the above  businesses  had been  consummated as of the beginning of
each period presented, are as follows:

<TABLE>
<CAPTION>
Three Months Ended September 30,      1997          1996 
- - --------------------------------      ----          ---- 
<S>                                <C>           <C>
Revenues .......................   $27,513,000   $23,056,000
Net income .....................   $ 3,981,000   $ 3,410,000
Net income per share ...........   $      0.21   $      0.19


Nine Months Ended September 30,           1997          1996 
- - -------------------------------           ----          ---- 
Revenues .......................   $73,548,000   $67,076,000
Net income .....................   $ 9,113,000   $ 9,045,000
Net income per share ...........   $      0.49   $      0.49
</TABLE>

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

     Overview  

     ATMI was  incorporated in Delaware in 1997 and is the successor  registrant
to ATM, which was  incorporated  in Connecticut  in 1986 and  reincorporated  in
Delaware in 1987. As used in this report,  "ATMI" and the "Company"  mean either
ATMI, Inc.  itself,  or ATMI,  Inc. and its  consolidated  subsidiaries,  as the
context may indicate. The Company primarily generates its revenues from sales of
products  in various  niche  markets in the  semiconductor  industry.  The three
principal  niche  markets the Company  serves  are:  point-of-use  environmental
equipment,  specialty  thin film materials and delivery  systems,  and epitaxial
processing services for the semiconductor industry.

     The Company has used a targeted  acquisition strategy to assist in building
critical mass and market position in the niches the Company serves. In 1994, ATM
acquired Vector Technical Group,  Inc.  ("Vector"),  and in conjunction with the
sale of certain  Novapure  product lines to Millipore  Corporation  in September
1994,  formed  ATMI  EcoSys  Corporation  ("EcoSys")  by  merging  the  retained
operations of Novapure with those of Vector.  In 1995, ATM acquired the Guardian
product line from Messer Griesheim Industries, Inc. and folded that product line
into EcoSys. In 1995, ATM acquired  Epitronics  Corporation,  and in early 1996,
combined that business with the ATM's former Diamond Electronics  division under
the Epitronics  name. In October 1997, ATMI acquired the ADCS Group and LSL. The
ADCS Group  manufactures and distributes  ultra-high purity  semiconductor  thin
film materials.  LSL is an outsourcer of epitaxial  processing of silicon wafers
using chemical vapor deposition technology to meet customer specifications.  The
operations of the ADCS Group are being  integrated with the operations of ATMI's
NovaMOS  division  under  the  ADCS  name  and the  operations  of LSL  with the
operations of ATMI's Epitronics division under the Epitronics name.

     The following table sets forth, for the periods  indicated,  the percentage
relationship to total revenues of certain items in ATM's Consolidated  Statement
of Operations:
<TABLE>
<CAPTION>
                                      Three Months Ended      Nine Months Ended
                                        September 30,            September 30,
                                        -------------            -------------
<S>                                  <C>         <C>         <C>         <C>
                                      1997        1996        1997        1996
                                      ----        ----        ----        ----
Product revenues ...............      85.4%       77.1%       82.8%       78.4%
Contract revenues ..............      14.6        22.9        17.2        21.6
                                      ----        ----        ----        ----
Total revenues .................     100.0       100.0       100.0       100.0
Cost of revenues ...............      48.0        52.4        50.1        51.8
                                      ----        ----        ----        ----
Gross profit ...................      52.0        47.6        49.9        48.2
Operating expenses:
Research and development .......      15.3        13.6        15.6        16.5
Selling, general, and
     administrative ............      24.0        26.5        23.8        26.4
                                      ----        ----        ----        ----
Total operating expenses .......      39.3        40.1        39.4        42.9
                                      ----        ----        ----        ----
Operating income ...............      12.7         7.5        10.5         5.3
Other income, net ..............       1.1         1.3         1.3         1.3
                                       ---         ---         ---         ---
Income before taxes ............      13.8         8.8        11.8         6.6
Income taxes ...................       3.7          .8         2.2         0.6
                                       ---          --         ---         ---
Net income .....................      10.1%        8.0%        9.6%        6.0%

</TABLE>


<PAGE>
     The following tables set forth revenues, cost of revenues, and gross profit
for products and contracts, as a percentage of each category:
<TABLE>
<CAPTION>
                                     Three Months Ended      Nine Months Ended
                                       September 30,          September 30,
                                       -------------          -------------
<S>                                  <C>         <C>         <C>         <C>
                                     1997        1996        1997       1996
                                     ----        ----        ----       ----
Products:
     Revenues ..................     100.0%      100.0%      100.0%      100.0%
     Cost of revenues ..........      41.3        42.3        43.0        42.7
                                     -----       -----       -----       -----
Gross profit ...................      58.7%       57.7%       57.0%       57.3%


Contracts:
     Revenues ..................     100.0%      100.0%      100.0%      100.0%
     Cost of revenues ..........      87.2        86.3        83.9        84.7
                                     -----       -----       -----       -----
Gross profit ...................      12.8%       13.7%       16.1%       15.3%
</TABLE>

Results of Operations
Three Months Ended September 30, 1997 and 1996.

     Revenues. Total revenues increased 25% to approximately  $15,188,000 in the
three months ended September 30, 1997 from approximately $12,145,000 in the same
three month period in 1996.  Product  revenues  increased  39% to  approximately
$12,968,000  in the three months  ended  September  30, 1997 from  approximately
$9,361,000 in the comparable  period in 1996. The increases in product  revenues
resulted  primarily from continued growth in sales of effluent treatment systems
by EcoSys and the continued  expansion of SDS product sales.  Contract  revenues
decreased 20% to  approximately  $2,220,000  in the quarter ended  September 30,
1997 from  approximately  $2,784,000 in the same three month period in 1996. The
general decrease in the government funding of contract research activities was a
result of the  completion  of funding  for the  development  of  next-generation
capacitor  thin films for dynamic  random access memory chips  ("DRAMS"),  which
began in 1993.

     Gross Profit. Gross profit increased 36% to approximately $7,892,000 in the
quarter ended  September 30, 1997 from  approximately  $5,786,000 in the quarter
ended September 30, 1996. Gross margin increased to 52% of revenues in the three
month period in 1997 compared with 48% for the same period in 1996. Gross profit
from product revenue  increased 41% to  approximately  $7,607,000 in the quarter
ended  September  30, 1997 from  approximately  $5,405,000  in the quarter ended
September 30, 1996. As a percentage of product revenues,  gross margin increased
to 59% in 1997 from 58% in 1996 due  principally to higher margin on the product
mix within the EcoSys product lines.

     Gross profit on contract revenues  decreased 25% to approximately  $285,000
in the quarter ended September 30, 1997 from approximately  $381,000 in the same
quarter last year. As a percentage of contract revenues,  gross margin decreased
to 13% in the 1997 quarter from 14% in the 1996 quarter. Contract margins varied
slightly from quarter to quarter based on the mix of cost-type, firm fixed price
and cost share arrangements.

     Research  and  Development  Expenses.  Research  and  development  expenses
increased  41% to  approximately  $2,320,000  in the third  quarter of 1997 from
approximately  $1,649,000 in the third quarter of 1996. The increase in the 1997
quarter  was  principally  due to new  product  development  within  EcoSys  and
technology development within Epitronics. As a percentage of revenues,  research
and  development  expenses  increased to 15% in the 1997 quarter from 14% in the
1996 quarter.

<PAGE>
     Selling,  General,  and  Administrative  Expenses.  Selling,  general,  and
administrative  expenses increased 13% to approximately  $3,647,000 in the three
months ended September 30, 1997 from approximately  $3,224,000 in the same three
month period in 1996.  The increase in the 1997 quarter was  primarily due to an
increase in variable selling expenses, most notably commissions,  which directly
relate to  increased  product  revenue.  In  addition,  administrative  expenses
increased slightly with the continued growth of the Company.  As a percentage of
revenues,  these  expenses  decreased to 24% in the 1997 quarter from 27% in the
1996 quarter.
 
     Other Income, Net. Other income increased 16% to approximately  $177,000 in
the quarter ended September 30, 1997 from approximately  $152,000 in the quarter
ended September 30, 1996. The increase in net other income is principally caused
by the decrease in interest expense on smaller debt balances in 1997 compared to
1996.

     Earnings  per  Share.  Earnings  per share  improved  to $.16 for the third
quarter of 1997 compared with earnings per share of $.10 in the third quarter of
1996.  Earnings per share in the 1997 period reflect the 4% increase in weighted
average shares outstanding from approximately  9,376,000 in the third quarter of
1996 to  approximately  9,742,000  in the  third  quarter  of 1997,  a result of
exercised  stock  options  under  the  Company's  existing  stock  plans and the
dilutive  effect  of  a  higher  stock  price  when  calculating   common  stock
equivalents.

Nine Months Ended September 30, 1997 and 1996.

     Revenues. Total revenues increased 19% to approximately  $41,286,000 in the
nine months ended September 30, 1997 from approximately  $34,583,000 in the same
period in 1996. Product revenues  increased 26% to approximately  $34,165,000 in
the nine months ended September 30, 1997 from  approximately  $27,105,000 in the
comparable period in 1996. The product revenue growth was primarily attributable
to the  continued  expansion  of SDS product  sales and higher  sales  levels at
EcoSys.  Contract revenues decreased 5% to approximately  $7,121,000 in the nine
months ended September 30, 1997 from approximately $7,479,000 in the same period
in 1996.  The  decline  in 1997 was from a general  decrease  in the  government
funding of the Company's contract research activities.

     Gross Profit.  Gross profit increased 24% to  approximately  $20,621,000 in
the nine months ended September 30, 1997 from  approximately  $16,688,000 in the
nine months ended September 30, 1996.  Gross margin increased to 50% of revenues
in the first nine  months of 1997 from 48% of  revenues in the first nine months
of 1996. As a percentage of product revenues,  gross margin remained constant at
57% from the first  nine  months of 1996 to the first nine  months of 1997.  The
constancy of product margins when comparing the two nine month periods  somewhat
masks the improved  margin profile of the Company's  overall product mix in 1997
due to the fact that the SDS  revenue  stream was a smaller  but  higher  margin
royalty stream in the 1996 period. As a percentage of contract  revenues,  gross
margin  increased  to 16% in the first nine months of 1997 from 15% in the first
nine months of 1996. Contract margins varied slightly for the nine month periods
due to different fee arrangements and indirect cost absorption.

     Research  and  Development  Expenses.  Research  and  development  expenses
increased 13% to approximately  $6,432,000 in the first nine months of 1997 from
approximately $5,697,000 in the first nine months of 1996. Increased development
efforts  pertaining  to the Company's  ferroelectric  thin film  technology  and
related applications were the primary cause for the increase, offsetting reduced
spending related to other  technology  development  efforts.  As a percentage of
revenues,  research and development  expenses  remained constant at 16% from the
first nine months of 1996 to the first nine months of 1997.

<PAGE>
     Selling,  General,  and  Administrative  Expenses.  Selling,  general,  and
administrative  expenses  increased 8% to  approximately  $9,835,000 in the nine
months ended September 30, 1997 from approximately $9,144,000 in the same period
in 1996.  The  increase  in the  1997  period  was  primarily  due to  increased
corporate administrative costs, increased commissions on higher product revenues
and increased product  marketing  activity.  As a percentage of revenues,  these
expenses  decreased  to 24% in the  first  nine  months  of 1997 from 26% in the
comparable period in 1996.
 
     Other Income, Net. Other income increased 20% to approximately  $526,000 in
the nine months ended September 30, 1997 from approximately $439,000 in the nine
months ended  September 30, 1996.  The increase in the first nine months of 1997
related  primarily to a decrease in interest expense as a result of decreases in
outstanding debt balances.

     Earnings per Share.  Earnings per share improved to $.41 for the first nine
months of 1997 compared with earnings per share of $.22 in the first nine months
of 1996.  The 1997 earnings per share reflect a 3% increase in weighted  average
shares outstanding from approximately 9,362,000 in the first nine months of 1996
to approximately 9,633,000 in the first nine months of 1997.

Liquidity and Capital Resources
 
     For the nine months ended September 30, 1997,  operations  utilized cash of
approximately $83,000 compared to the generation of approximately $2,902,000 for
the  comparable  1996  period  despite a  substantial  increase in net income to
approximately $3,979,000 in 1997 compared to $2,085,000 in 1996. Working capital
fluctuations,  most  notably in accounts  receivable,  other assets and accounts
payable were responsible for significant uses of cash. Certain transaction costs
approximating  $2.6 million incurred in association with the  reorganization and
the  acquisitions of the ADCS Group and LSL are included as other current assets
at  September  30, 1997 and account for a portion of these  fluctuations.  These
transaction  costs will be expensed  in the fourth  quarter of 1997 as part of a
non-recurring charge of approximately $9,000,000.

     For the nine month period ended  September 30, 1997,  investing  activities
utilized  approximately  $2,088,000  in cash  compared  with the  generation  of
approximately  $1,751,000 in the nine months ended  September 30, 1996.  Capital
expenditures  of  $2,978,000  for the first nine months of 1997 include both the
installation  of SDS  manufacturing  capacity  in the  Danbury  facility  and an
increase in epitaxial capacity at Epitronics' Phoenix facility.  This was offset
by the sale of approximately  $1,140,000 in marketable  securities.  In the 1996
period, ATM incurred approximately $3,243,000 in capital expenditures, primarily
related to the expansion of the  manufacturing  and  laboratory  capacity in the
Company's  Danbury  facility,  and sold  approximately  $4,995,000 of marketable
securities.

     ATM generated  approximately $54,000 of cash in financing activities during
the nine months ended September 30, 1997 compared with the use of  approximately
$3,814,000  for  the  same  period  in  1996.  Debt  payments  of  approximately
$4,580,000  during  the  1996  period  included  the  payment  of  a  $4,000,000
promissory note related to the acquisition of the Guardian Systems product line.

<PAGE>
     ATMI  believes  the  combination  of  existing  cash  balances,  marketable
securities, existing sources of liquidity and anticipated funds from operations,
including  those of the newly  acquired  businesses,  will satisfy its projected
working  capital and other cash  requirements  through at least the end of 1998.
However,  ATMI believes the level of financing  resources  available to it is an
important  competitive  factor in its industry and may seek  additional  capital
prior to the end of that period.  Additionally,  ATMI considers, on a continuing
basis,  potential  acquisitions of technologies and businesses  complementary to
its  current  business.  There are no  present  understandings,  commitments  or
agreements with respect to any such acquisition.  However,  any such transaction
may affect ATMI's future capital needs.

Safe Harbor Statement
 
     Statements  which  are not  historical  facts in this  report  are  forward
looking statements, made on a good faith basis. Such forward looking statements,
including those  concerning the Company's  expectations  for demand and sales of
new and existing products, semiconductor industry and market segment growth, and
market and technology opportunities, all involve risk and uncertainties.  Actual
results may differ  materially  from  forward  looking  statements,  for reasons
including,  but not limited to, changes in the pattern of semiconductor industry
growth or the markets the Company sells products for,  customer  interest in the
Company's products,  product and market  competition,  delays or problems in the
development and  commercialization  of the Company's products,  or technological
change affecting the Company's core thin film competencies.

     Item 3.  Quantitative and Qualitative  Disclosures  about Market Risk - Not
Applicable


<PAGE>
PART II- OTHER INFORMATION

Item 5. Pro Forma Financial Statements

     The  following  unaudited  pro forma  condensed  combined  balance sheet at
September 30, 1997 and the unaudited pro forma condensed combined  statements of
operations  for the nine months  ended  September  30, 1997 and 1996 and for the
years ended December 31, 1996,  1995,  and 1994 give effect to the  transactions
completed on October 10, 1997, under the Merger and Exchange  Agreement pursuant
to which ATM became a  wholly-owned  subsidiary of the Company and each share of
ATM Common Stock was converted into one share of the Company's  Common Stock and
the ADCS Interests  were  simultaneously  exchanged for 5,468,747  shares of the
Company's Common Stock as if the  Reorganization had occurred on January 1, 1994
for purposes of the combined  statements of operations and at September 30, 1996
for the combined  balance  sheet.  The  unaudited pro forma  condensed  combined
balance  sheet at  September  30,  1997 and the  unaudited  pro forma  condensed
combined  statements of operations for the nine months ended  September 30, 1997
and 1996 and for the years ended  December  31, 1996,  1995,  and 1994 also give
effect to the Lawrence  Acquisition pursuant to which each outstanding shares of
LSL Common Stock was converted at October 10, 1997 into 3,628,571  shares of the
Company's  Common  Stock.  The  pro  forma   information  gives  effect  to  the
Reorganization  and the  Lawrence  Acquisition  under  the  pooling-of-interests
method  and to  the  adjustments  described  in the  accompanying  notes  to the
unaudited pro forma condensed combined financial statements.

     The unaudited pro forma condensed combined financial  statements may not be
indicative of the results that would have occurred if the Reorganization and the
Lawrence  Acquisition  had been  consummated  as of the dates  indicated  or the
operating  results  which may be  obtained  by the  Company in the  future.  The
unaudited pro forma condensed  combined  financial  statements should be read in
conjunction with the consolidated  financial  statements,  including the related
notes thereto,  and other financial  information included in ATM's Annual Report
on Form 10-K for the fiscal year ended  December  31, 1996 and in other parts of
this  Quarterly  Report on Form 10-Q;  in the ADCS  Group's  combined  financial
statements  and  Lawrence's  combined  financial  statements for the fiscal year
ended  December 31, 1996,  included in the Company's  Current Report on Form 8-K
dated October 10, 1997.

<PAGE>
<TABLE>
<CAPTION>
                                   ATMI, Inc.
             Pro Forma Condensed Combined Balance Sheet (unaudited)
                               September 30, 1997
                                 (in thousands)

                                                
                                                          Pro Forma    Pro Forma
                              ATM      ADCS     Lawrence  Adjustments    ATMI, 
                              ---      Group    --------  -----------    Inc.
                                       -----                             ----
<S>                          <C>     <C>        <C>         <C>       <C>
Assets
Current assets:
Cash and cash equivalents .. $18,149  $ 3,816   $  2,271               $ 24,236
Accounts receivable, net ...  12,258    4,541      5,674                 22,473
Inventories ................   5,356    1,882      1,631                  8,869
Other ......................   3,007    1,039      1,045    (4,400)         691
                               -----    -----      -----                    ---
Total current assets .......  38,770   11,278     10,621                 56,269

Property and equipment, net .  9,378    5,424     21,346                 36,148
Goodwill and other
long-term assets, net ......   6,370      424      1,197                  7,991
                               -----      ---      -----                  -----
                             $54,518 $ 17,126   $ 33,164              $ 100,408
                             ======= ========   ========              =========

Liabilities and
 stockholders' equity
Current liabilities:
Accounts payable ........... $ 2,364  $ 1,499   $    769               $  4,632
Accrued expenses ...........   4,982      448        676     4,600       10,706
Notes payable,
 current portion ............    619        8      4,702                  5,329
Other ......................   1,124      276        969                  2,369
                               -----      ---        ---                  -----
Total current liabilities ..   9,089    2,231      7,116                 23,036

Notes payable,
less current portion
                               4,507      145     10,859                 15,511
Other long-term liabilities .     56       32      5,123                  5,211

Minority Interest ..........       0      578          0                    578

Stockholders' equity:
Common stock ...............      88      227                  (88)
                                                              (227)
                                                               179          179
Additional paid-in capital .  37,728        0         60       136       37,924
Retained earnings ..........   3,050   13,913     10,006    (9,000)      17,969
                               -----   ------     ------                 ------
Total stockholders' equity .  40,866   14,140     10,066                 56,072
                              ------   ------     ------                 ------
                             $54,518 $ 17,126   $ 33,164              $ 100,408
                             =======   ========  ========             =========
</TABLE>
See accompanying notes.


<PAGE>
<TABLE>
<CAPTION>
                                   ATMI, Inc.
             Pro Forma Combined Statement of Operations (unaudited)
                      Nine Months Ended September 30, 1997
                      (in thousands, except per share data)


                                    ATM      ADCS      Lawrence   Pro Forma
                                    ---      Group     --------      ATMI
                                             -----                   ----
<S>                               <C>       <C>         <C>       <C>
Revenues:
   Product revenues ...........   $34,165   $ 17,583    $14,679   $ 66,427
   Contract revenues ..........     7,121          0          0      7,121
                                    -----          -          -      -----
Total revenues ................    41,286     17,583     14,679     73,548
Cost of revenues:
   Cost of product revenues ...    14,691      6,141      8,636     29,468
   Cost of contract revenues ..     5,974          0          0      5,974
                                    -----          -          -      -----
Total cost of revenues ........    20,665      6,141      8,636     35,442
                                   ------      -----      -----     ------
Gross profit ..................    20,621     11,442      6,043     38,106

Operating expenses:
   Research and development ...     6,432      1,431          0      7,863
   Selling, general,
      and administrative            9,836      5,292      2,064     17,192
                                    -----      -----      -----     ------
                                   16,268      6,723      2,064     25,055
                                   ------      -----      -----     ------
Operating income ..............     4,353      4,719      3,979     13,051

Interest income (expense), net        526        162       (796)      (108)
                                      ---        ---       ----       ---- 
Income before taxes
      and minority interest
                                    4,879      4,881      3,183     12,943
Income taxes ..................       900      1,653      1,229      3,782
                                      ---      -----      -----      -----
Income before minority interest     3,979      3,228      1,954      9,161
Minority interest .............         0        (48)         0        (48)
                                        -        ---          -        --- 

Net income ....................   $ 3,979   $  3,180    $ 1,954   $  9,113
                                  =======   ========    =======   ========

Net income per share ..........                                   $   0.49
                                                                  --------

Weighted average
      shares outstanding                                            18,730
                                                                    ======
                                                                   
</TABLE>

See accompanying notes.

<PAGE>
<TABLE>
<CAPTION>

                                   ATMI, Inc.
             Pro Forma Combined Statement of Operations (unaudited)
                      Nine Months Ended September 30, 1996
                      (in thousands, except per share data)


                                    ATM      ADCS    Lawrence    Pro Forma
                                    ---      Group   --------      ATMI
                                             -----                 ----
<S>                               <C>       <C>       <C>       <C>
Revenues:
   Product revenues ...........   $27,105   $16,745   $15,747   $ 59,597
   Contract revenues ..........     7,479         0         0      7,479
                                    -----         -         -      -----
Total revenues ................    34,584    16,745    15,747     67,076
Cost of revenues:
   Cost of product revenues ...    11,564     5,208     7,763     24,535
   Cost of contract revenues ..     6,331         0         0      6,331
                                    -----         -         -      -----
Total cost of revenues ........    17,895     5,208     7,763     30,866
                                   ------     -----     -----     ------
Gross profit ..................    16,689    11,537     7,984     36,210

Operating expenses:
   Research and development ...     5,697     1,230         0      6,927
   Selling, general,
      and administrative            9,144     4,897     1,840     15,881
                                    -----     -----     -----     ------
                                   14,841     6,127     1,840     22,808
                                   ------     -----     -----     ------
Operating income ..............     1,848     5,410     6,144     13,402

Interest income (expense), net        439       216      (682)       (27)
                                      ---       ---      ----        --- 
Income before taxes
      and minority interest         2,287     5,626     5,462     13,375
                                    
Income taxes ..................       202     2,155     2,102      4,459
                                      ---     -----     -----      -----
Income before minority interest     2,085     3,471     3,360      8,916
Minority interest .............         0       129         0        129
                                        -       ---         -        ---
Net income ....................   $ 2,085   $ 3,600   $ 3,360   $  9,045
                                  =======   =======   =======   ========
Net income per share ..........                                 $   0.49
                                                                --------

Weighted average
      shares outstanding                                          18,460
                                                                  ======
                                                                 
</TABLE>

See accompanying notes.

<PAGE>
<TABLE>
<CAPTION>
                                   ATMI, Inc.
             Pro Forma Combined Statement of Operations (unaudited)
                          Year Ended December 31, 1996
                      (in thousands, except per share data)


                                    ATM      ADCS    Lawrence  Pro Forma
                                    ---      Group   --------     ATMI
                                             -----                ----
<S>                               <C>       <C>       <C>       <C>
Revenues:
   Product revenues ...........   $36,504   $22,041   $20,271   $78,816
   Contract revenues ..........     9,846         0         0     9,846
                                    -----         -         -     -----
Total revenues ................    46,350    22,041    20,271    88,662
Cost of revenues:
   Cost of product revenues ...    15,939     6,567    10,384    32,890
   Cost of contract revenues ..     8,341         0         0     8,341
                                    -----         -         -     -----
Total cost of revenues ........    24,280     6,567    10,384    41,231
                                   ------     -----    ------    ------
Gross profit ..................    22,070    15,474     9,887    47,431

Operating expenses:
   Research and development ...     7,627     2,212         0     9,839
   Selling, general,
      and administrative           11,510     6,365     4,715    22,590
                                   ------     -----     -----    ------
                                   19,137     8,577     4,715    32,429
                                   ------     -----     -----    ------
Operating income ..............     2,933     6,897     5,172    15,002

Interest income (expense), net        627       210     (835)         2
Other income, net .............         0        18         0        18
                                        -        --         -        --
Income before taxes
      and minority interest         3,560     7,125     4,337    15,022
                                    
Income taxes ..................       239     2,732     1,669     4,640
                                      ---     -----     -----     -----
Income before minority interest     3,321     4,393     2,668    10,382
Minority interest .............         0       151         0       151
                                        -       ---         -       ---
Net income ....................   $ 3,321   $ 4,544   $ 2,668   $10,533
                                  =======   =======   =======   =======

Net income per share ..........                                 $  0.57
                                                                -------

Weighted average
      shares outstanding
                                                                 18,456
                                                                 ======

</TABLE>
See accompanying notes.

<PAGE>
<TABLE>
<CAPTION>

                                   ATMI, Inc.
             Pro Forma Combined Statement of Operations (unaudited)
                          Year Ended December 31, 1995
                      (in thousands, except per share data)


                                      ATM        ADCS      Lawrence Pro   Forma 
                                      ---        Group     --------       ATMI
                                                 -----                    ----
<S>                                  <C>       <C>         <C>         <C>

Revenues:
   Product revenues ..............   $21,336   $ 15,715    $ 14,409    $ 51,460
   Contract revenues .............     8,712          0           0       8,712
                                       -----          -           -       -----
Total revenues ...................    30,048     15,715      14,409      60,172
Cost of revenues:
   Cost of product revenues ......     9,609      4,860       7,764      22,233
   Cost of contract revenues .....     7,490          0           0       7,490
                                       -----          -           -       -----
Total cost of revenues ...........    17,099      4,860       7,764      29,723
                                      ------      -----       -----      ------
Gross profit .....................    12,949     10,855       6,645      30,449

Operating expenses:
   Research and development ......     4,206      1,491           0       5,697
   Selling, general,
      and administrative               8,558      5,407       1,921      15,886
                                       -----      -----       -----      ------
                                      12,764      6,898       1,921      21,583
                                      ------      -----       -----      ------
Operating income .................       185      3,957       4,724       8,866

Interest income (expense), net ...       503         54        (914)       (357)
Other expense, net ...............         0        (51)       (493)       (544)
                                           -       ----        ----         ---
Income before taxes
     and minority interest .......       688      3,960       3,317       7,965
Income taxes .....................       134      1,389       1,364       2,887
                                         ---      -----       -----       -----
Income before minority interest ..       554      2,571       1,953       5,078
Minority interest ................         0         10           0          10
                                           -         --           -          --

Net income .......................   $   554   $  2,581    $  1,953    $  5,088
                                     =======   ========    ========    ========

Net income per share .............                                     $   0.30
                                                                       --------

Weighted average
     shares outstanding
                                                                         17,171
                                                                         ======

</TABLE>
See accompanying notes.

<PAGE>
<TABLE>
<CAPTION>
                                   ATMI, Inc.
             Pro Forma Combined Statement of Operations (unaudited)
                          Year Ended December 31, 1994
                      (in thousands, except per share data)


                                           ATM      ADCS    Lawrence  Pro Forma
                                           ---      Group   --------     ATMI
                                                     -----               ----
<S>                                     <C>         <C>      <C>       <C>
Revenues:
   Product revenues .................   $ 12,539    $7,821   $ 7,178   $ 27,538
   Contract revenues ................      7,222         0         0      7,222
                                           -----         -         -      -----
Total revenues ......................     19,761     7,821     7,178     34,760
Cost of revenues:
   Cost of product revenues .........      5,839     1,806     3,943     11,588
   Cost of contract revenues ........      6,151         0         0      6,151
                                           -----         -         -      -----
Total cost of revenues ..............     11,990     1,806     3,943     17,739
                                          ------     -----     -----     ------
Gross profit ........................      7,771     6,015     3,235     17,021

Operating expenses:
   Research and development .........      3,415       566         0      3,981
   Selling, general,
     and administrative                    5,588     2,539     1,181      9,308
                                           -----     -----     -----      -----
                                           9,003     3,105     1,181     13,289
                                           -----     -----     -----     ------
Operating income ....................     (1,232)    2,910     2,054      3,732

Interest income (expense), net ......        390        23      (663)      (250)
Other income, net ...................      3,594         0       167      3,761
                                           -----         -       ---      -----
Income before taxes
     and minority interest                 2,752     2,933     1,558      7,243
                                         
Income taxes ........................        124       970       634      1,728
                                             ---       ---       ---      -----
Income before minority interest .....      2,628     1,963       924      5,515
Minority interest ...................          8        12         0         20
                                               -        --         -         --

Net income ..........................   $  2,636    $1,975   $   924   $  5,535
                                        ========    ======   =======   ========

Net income per share ................                                  $   0.33
                                                                       --------

Weighted average
     shares outstanding                                                  16,693
                                                                         ======
                                                                         
</TABLE>

See accompanying notes.


<PAGE>
                                   ATMI, Inc.
                Notes To Pro Forma Combined Financial Statements
                                   (unaudited)

1. Basis of Presentation

     Pursuant to the Merger and Exchange  Agreement,  ATM became a  wholly-owned
subsidiary  of the  Company.  Each  outstanding  share of ATM  Common  Stock was
converted into the right to receive one share of the Company's Common Stock. The
Company  also issued  5,468,747  shares of the  Company's  Common  Stock for the
interests in the ADCS Group and 3,628,571  shares of the Company's  Common Stock
for the LSL Common  Stock.  The effect of this  transaction  is to decrease  the
stated  common  stock  of ATM,  and the  ADCS  Group by  $88,000  and  $227,000,
respectively  and to increase the combined stated common stock of the Company by
$179,000 and additional  paid in capital by $136,000 to reflect the par value of
the  Company  Common  Stock  outstanding  after  the   reorganization   and  the
acquisitions of the ADCS Group and LSL on October 10, 1997.

2. Pro Forma Per Share Data

     Pro forma  earnings per common share have been  computed for the nine month
periods ended  September 30, 1997 and 1996 and for the years ended  December 31,
1996,  1995,  and 1994 based upon the weighted  average  number of common shares
outstanding  of ATM  combined  with the merger  consideration  in the pooling of
interests for the  acquisition of the ADCS Group of 5,468,747  common shares and
for the acquisition of 3,628,571 common shares.

3. Income taxes

     Net income and  earnings  per common  share for the nine month period ended
September 30, 1996 and the year ended  December 31, 1996 have been  presented to
include tax amounts as if the ADCS Group were a C Corporation  for the full year
although   for  a  portion  of  1996  the  ADCS  Group  had  the  status  of  an
S-Corporation.   The  pro  forma   combined   income  taxes  were  increased  by
approximately $1,517,000 and $1,483,000, respectively.

4. Transaction Costs

     As of September 30, 1997,  approximately  $4,400,000 of  transaction  costs
were included in other current assets.  The pro forma condensed combined balance
sheet has been  adjusted to  eliminate  such costs and to  recognize  additional
accrued  expenses  equivalent  to the expected  transaction  costs of $9,000,000
associated with the  reorganization  and the  acquisitions of the ADCS Group and
LSL.  Retained earnings have been adjusted to reflect a charge to earnings as if
the transactions had occurred prior to September 30, 1997.

     The  unaudited pro forma  combined  statements of operations do not include
costs associated with the  reorganization and the acquisitions of the ADCS Group
and LSL, which are expected to be approximately  $9,000,000 in the aggregate and
will be charged to  earnings  in the fourth  quarter of 1997 as a  non-recurring
charge.

<PAGE>

Item 6.  Exhibits and Reports on Form 8-K.


a.       Exhibits.

Exhibit No.                                Description

3.01      Certificate  of Amendment to Certificate  of  Incorporation  (Exhibit
4.1(b) to Post-Effective  Amendment No. 1 to Registration Statement on Form S-8,
Registration No. 33-93048) (1)

11.01     Statement re: computation of per share earnings (Filed herewith)

27.01     Financial Data Schedule (Filed herewith)

         (1) Incorporated by reference


b.       Reports on Form 8-K.

     On October 10, 1997,  the Company filed a Current  Report on Form 8-K dated
October  10,  1997  reporting  in  Item  2  thereof  the   consummation  of  the
reorganization and acquisitions of the ADCS Group and LSL.


<PAGE>

                                   SIGNATURES

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.

                                                 ATMI, Inc.

November 11, 1997

By                      /S/ Eugene G. Banucci
                        ----------------------
                        Eugene G. Banucci, Ph.D., President


By                      /S/ Daniel P. Sharkey
                        ---------------------
                        Daniel P. Sharkey, Treasurer (Chief Accounting Officer)


<PAGE>
                                  EXHIBIT INDEX


                                                     
Exhibit       Description
  No.         -----------
- - -------

3.01      Certificate  of Amendment to Certificate  of  Incorporation  (Exhibit
4.1(b) to Post- Effective Amendment No. 1 to Registration Statement on Form S-8,
Registration No. 33-93048) (1)

11.01     Statement re: computation of per share earnings

Financial Data Schedule

(1) Incorporated by reference.



<TABLE>
<CAPTION>

                                  EXHIBIT 11.01

                       ADVANCED TECHNOLOGY MATERIALS, INC.

                    COMPUTATION OF EARNINGS PER COMMON SHARE



                                       Quarter Ended    Quarter Ended
                                        9/30/97           9/30/96
<S>                                  <C>                 <C>


Net income ......................    $ 1,533,188         $  974,618
                                     ===========         ==========

Average common shares outstanding      8,816,542          8,743,605

Incremental shares issuable
pursuant to employee stock
options and warrants (if dilutive)       925,337            632,359
                                         -------            -------
Total shares .....................     9,741,879          9,375,964
                                       =========          =========

Net income per share .............   $      0.16         $     0.10
                                     ===========         ==========
</TABLE>
<TABLE>
<CAPTION>


                                      Nine MonthsNine Months
                                     Ended 9/30/97 Ended 9/30/96

<S>                                  <C>                 <C>
Net income .......................   $ 3,979,353         $2,084,512
                                     ===========         ==========

Average common shares outstanding      8,803,546          8,732,455

Incremental shares issuable
 pursuant to employee stock
 options and warrants (if dilutive)      829,195            629,852
                                         -------            -------
Total shares .....................     9,632,741           9,362,307
                                       =========           =========

Net income per share ..............  $      0.41          $     0.22
                                     ===========          ==========
</TABLE>


<TABLE> <S> <C>


<ARTICLE>                                      5
<MULTIPLIER>                                   1000
       
<S>                                            <C>
<PERIOD-TYPE>                                  9-MOS
<FISCAL-YEAR-END>                              Dec-31-1997
<PERIOD-END>                                   Sep-30-1997
<CASH>                                         2320
<SECURITIES>                                   15829
<RECEIVABLES>                                  12258<F1>
<ALLOWANCES>                                   0
<INVENTORY>                                    5355
<CURRENT-ASSETS>                               38770
<PP&E>                                         9378<F2>
<DEPRECIATION>                                 0
<TOTAL-ASSETS>                                 54518
<CURRENT-LIABILITIES>                          9089
<BONDS>                                        0
                          0
                                    0
<COMMON>                                       88
<OTHER-SE>                                     40777
<TOTAL-LIABILITY-AND-EQUITY>                   54518
<SALES>                                        41286
<TOTAL-REVENUES>                               41286
<CGS>                                          20665
<TOTAL-COSTS>                                  20665
<OTHER-EXPENSES>                               6432<F3>
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             309
<INCOME-PRETAX>                                4880
<INCOME-TAX>                                   900
<INCOME-CONTINUING>                            0
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   3980
<EPS-PRIMARY>                                  .41
<EPS-DILUTED>                                  .41


<FN>
<F1>Net of  allowance  for doubtful  accounts,  consistent  with  balance  sheet
presentation.
<F2>Net of accumulated depreciation, consistent with balance sheet
presentation.
<F3>Research and development expenses
</FN>
        

</TABLE>


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