<PAGE>   1

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

                                    FORM 10-Q

(MARK ONE)
[X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
ACT OF 1934 
For the Fiscal Quarter Ended March 31 1999

                                       OR

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


                                 GLASSTECH, INC.
             (Exact name of registrant as specified in its charter)

Delaware                                  33-32185-01           13-3440225
--------                                  -----------           ----------
(State or other jurisdiction              (Commission          (IRS Employer
of incorporation or organization)         file number)       Identification No.)

Ampoint Industrial Park, 995 Fourth Street, Perrysburg, Ohio          43551
(Address of principal executive offices)                           (Zip Code)

       Registrant's telephone number, including area code: (419)-661-9500

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 common stock, $.01 par value as of May 7, 1999 was 1,000.


                                       1

<PAGE>   2


                         PART I - FINANCIAL INFORMATION


ITEM 1.  FINANCIAL STATEMENTS

     The condensed consolidated financial statements presented herein are
unaudited but, in the opinion of management, reflect all adjustments necessary
to present fairly such information for the periods and at the dates indicated.
Since the following condensed unaudited financial statements have been prepared
in accordance with Article 10 of Regulation S-X, they do not contain all
information and footnotes normally contained in annual consolidated financial
statements. Accordingly they should be read in conjunction with the Consolidated
Financial Statements and notes thereto appearing in the Annual Report on Form
10-K for the fiscal year ended June 30, 1998, as filed with the Securities and
Exchange Commission on September 24, 1998. The interim results of operations are
not necessarily indicative of results for the entire year.




                                       2
<PAGE>   3


                                 GLASSTECH, INC.
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                             (DOLLARS IN THOUSANDS)
                                   (UNAUDITED)


<TABLE>
<CAPTION>
                                                                          MARCH 31, 1999    JUNE 30, 1998
                                                                          -------------------------------
                                                                                   (SEE NOTE 1)
<S>                                                                         <C>               <C>      
ASSETS
Current assets:
   Cash and cash equivalents                                                $   2,769         $  13,121
   Accounts receivable:
     Contracts:
       Uncompleted, including unbilled amounts of $3,997 and $6,841             7,314             7,930
       Completed                                                                  513               931
     Trade, less allowance of $40 for doubtful accounts                         1,693             1,144
                                                                          -------------------------------
                                                                                9,520            10,005
   Inventory:
     Replacement and service parts                                              2,077             1,656
     Furnace contracts and other                                                1,276             2,017
                                                                          -------------------------------
                                                                                3,353             3,673
   Prepaid expenses                                                               480               350
                                                                          -------------------------------
Total current assets                                                           16,122            27,149

Property, plant and equipment, net                                              7,066             6,947

Other assets:
   Patents, less accumulated amortization of $3,022 and $1,727                 15,260            16,556
   Goodwill, less accumulated amortization of $4,516 and $2,629                45,909            47,796
   Deferred financing costs and other                                           4,013             4,471
                                                                          -------------------------------
Total other assets                                                             65,182            68,823
                                                                          -------------------------------
                                                                            $  88,370         $ 102,919
                                                                          ===============================
LIABILITIES AND SHAREHOLDER'S EQUITY Current liabilities:
   Accounts payable                                                         $   1,831         $   4,167
   Billings in excess of costs and estimated earnings on uncompleted            2,049             4,309
     contracts
   Accrued liabilities:
     Interest                                                                   2,231             4,462
     Salaries and wages                                                         1,868             3,851
     Contract costs                                                               982             2,382
     Other                                                                      1,071             1,440
                                                                          -------------------------------
                                                                                6,152            12,135
                                                                          -------------------------------
Total current liabilities                                                      10,032            20,611

Long-term debt                                                                 69,438            69,357
Nonpension postretirement obligation                                              419               406

Shareholder's equity:
   Common stock $.01 par value; 1,000 shares authorized, issued and                 -                 -
     outstanding
   Additional capital                                                          15,750            15,750
   Retained earnings                                                           (3,241)              823
                                                                          -------------------------------
                                                                               12,509            16,573
   Shareholder's basis reduction                                               (4,028)           (4,028)
                                                                          -------------------------------
Total shareholder's equity                                                      8,481            12,545
                                                                          -------------------------------
                                                                            $  88,370         $ 102,919
                                                                          ===============================
</TABLE>


See accompanying notes.



                                       3
<PAGE>   4


                                 GLASSTECH, INC.
                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                             (DOLLARS IN THOUSANDS)
                                   (UNAUDITED)


<TABLE>
<CAPTION>
                                                            THREE MONTHS ENDED MARCH 31,        NINE MONTHS ENDED MARCH 31,
                                                              1999            1998                1999            1998
                                                         --------------------------------    --------------------------------
                                                                    (SEE NOTE 1)                       (SEE NOTE 1)

<S>                                                             <C>             <C>                 <C>            <C>    
Net revenue                                                     $11,291         $16,739             $41,550        $48,749
Cost of goods sold                                                7,130           9,002              26,035         25,332
                                                         --------------------------------    -------------------------------
Gross profit                                                      4,161           7,737              15,515         23,417

Selling, general and administrative expenses                      1,951           2,713               6,761          8,153
Research and development expenses                                   781           1,067               2,663          3,073
Amortization expense                                              1,061           1,088               3,182          3,267
                                                         --------------------------------    -------------------------------
Operating profit                                                    368           2,869               2,909          8,924

Interest expense                                                 (2,417)         (2,414)             (7,251)        (7,217)
Other income - net                                                   43             121                 278            362
                                                         --------------------------------    -------------------------------
Income (loss) before income taxes                                (2,006)            576              (4,064)         2,069

Income taxes not payable in cash                                      -            (470)                  -         (1,686)
                                                         ================================    ===============================
Net income (loss)                                              $ (2,006)      $     106            $ (4,064)     $     383
                                                         ================================    ===============================
</TABLE>


See accompanying notes.


                                       4
<PAGE>   5


                                 GLASSTECH, INC.
            CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDER'S EQUITY
                             (DOLLARS IN THOUSANDS)
                                   (UNAUDITED)


<TABLE>
<CAPTION>
                                                COMMON STOCK                          SHAREHOLDER'S            
                                         ---------------------------   ADDITIONAL         BASIS        RETAINED
                                            SHARES        AMOUNT        CAPITAL         REDUCTION       EARNINGS      TOTAL
                                         ---------------------------------------------------------------------------------------
                                                                            (SEE NOTE 1)

<S>                                             <C>       <C>            <C>           <C>           <C>               <C>    
Issuance of common stock                        1         $   -          $15,750       $        -    $        -        $15,750
Shareholder's basis reduction                                                              (4,028)                      (4,028)
Net income                                                                                                  823            823
                                         ---------------------------------------------------------------------------------------
Balance, June 30, 1998                          1             -           15,750           (4,028)          823         12,545
Net loss                                                                                                 (4,064)        (4,064)
                                         ---------------------------------------------------------------------------------------
Balance, March 31, 1999                         1         $   -          $15,750          $(4,028)      $(3,241)        $8,481
                                         =======================================================================================
</TABLE>


See accompanying notes.


                                       5
<PAGE>   6


                                 GLASSTECH, INC.
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                             (DOLLARS IN THOUSANDS)
                                   (UNAUDITED)

<TABLE>
<CAPTION>
                                                                                        NINE MONTHS ENDED
                                                                                           MARCH 31,
                                                                                      1999             1998
                                                                                  ------------------------------
                                                                                           (SEE NOTE1)
<S>                                                                                 <C>              <C>     
OPERATING ACTIVITIES
Net income (loss)                                                                   $ (4,064)        $    383
Adjustments to reconcile net income (loss) to net cash provided by operating
   activities:
     Depreciation and amortization                                                     4,813            4,975
     Income taxes not payable in cash                                                      -            1,686
     Nonpension postretirement benefit obligation expense in excess of
       payments                                                                           13               15
     Accretion of debt discount                                                           81               80
     Other                                                                                 -                2
     Changes in assets and liabilities affecting operations:
         Restricted cash                                                                   -            1,529
         Accounts receivable                                                             485              548
         Inventory                                                                      (951)             564
         Prepaid expenses                                                               (130)             101
         Accounts payable                                                             (2,336)            (967)
         Billings in excess of costs and estimated earnings on uncompleted
           contracts                                                                  (2,260)          (1,749)
         Accrued liabilities                                                          (5,983)           1,468
                                                                                  ------------------------------
Net cash provided by (used in) operating activities                                  (10,332)           8,635

INVESTING ACTIVITIES
Net assets purchased                                                                       -          (74,828)
Increase in long-term notes receivable                                                     -             (656)
Additions to property, plant and equipment                                               (10)            (234)
Other                                                                                    (10)               2
                                                                                  ------------------------------
Net cash used in investing activities                                                    (20)         (75,716)

FINANCING ACTIVITIES
Issuance of long-term debt and related warrants                                            -           70,000
Issuance of common stock                                                                   -           15,000
Deferred financing costs                                                                   -           (4,281)
                                                                                  ------------------------------
Net cash provided by financing activities                                                  -           80,719

Increase (decrease) in cash and cash equivalents                                     (10,352)          13,638
Cash and cash equivalents at beginning of year                                        13,121                -
                                                                                  ------------------------------
Cash and cash equivalents at end of period                                          $  2,769         $ 13,638
                                                                                  ==============================

Supplemental disclosure of cash flow information:
  Cash paid (received) during the period for the following:
       Interest                                                                     $  8,925         $  4,438
                                                                                  ==============================
       Income taxes                                                                 $     21         $   (272)
                                                                                  ==============================
</TABLE>

See accompanying notes.


                                       6
<PAGE>   7


                                 GLASSTECH, INC.
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                             (DOLLARS IN THOUSANDS)
                                   (UNAUDITED)

1.    BASIS OF PRESENTATION

     Effective July 2, 1997, Glasstech, Inc. (the "Company") was acquired by
Glasstech Holding Co. ("Holding") (the "Transaction"). In connection with the
Transaction, Holding, a holding company formed for the purpose of completing the
Transaction, formed a wholly owned subsidiary, Glasstech Sub Co., which acquired
all of the outstanding stock of the Company by merger. Holding has no
significant activities other than its investment in the Company. The acquisition
was accounted for under the purchase method of accounting for financial
reporting purposes and the purchase price was allocated to the underlying net
assets acquired. The Transaction resulted in the Company having substantial
goodwill and debt.

     In connection with accounting for the Transaction, the Company applied the
provisions of Emerging Issues Task Force Issue 88-16 (EITF 88-16), whereby the
carryover equity interests of certain shareholders from the "Predecessor
Company" (the Company prior to the transaction) to the "Successor Company" (the
Company subsequent to the Transaction) were recorded at their predecessor basis.
As a result, shareholder's equity of the Successor Company was reduced by $4,028
with a corresponding reduction to the value of goodwill acquired.

     The condensed consolidated balance sheet as of June 30, 1998 has been
derived from the audited consolidated financial statements at that date but,
does not include all of the information and footnotes required by generally
accepted accounting principles for complete financial statements.

2.    NOTES PAYABLE AND LONG-TERM DEBT

     In connection with the Transaction, the Company issued $70,000 of 12 3/4%
Senior Notes due 2004 (the "Old Notes") in a private offering exempt from
registration under the Securities Act of 1933, as amended (the "1933 Act"). The
offering of the Old Notes was also structured to permit resales under Rule 144A
of the 1933 Act. In connection with the issuance of the Old Notes, the Company
received from Holding warrants to purchase 877 shares of common stock of Holding
valued at $750. These warrants were issued to the purchasers of the Old Notes.
On December 2, 1997, the Company consummated an exchange offer (the "Exchange
Offer") of its $70,000 Series B 12 3/4% Senior Notes Due 2004 (the "New Notes"),
which were registered under the 1933 Act, for the Old Notes. The terms of the
New Notes are substantially identical to the terms of the Old Notes and as used
herein, will be referred to as the "Senior Notes." Interest on the Senior Notes
is payable semi-annually on each January 1 and July 1 beginning January 1, 1998.
The terms of the Senior Notes do not require any scheduled principal payments
prior to maturity.

     The Company also entered into a $10,000 revolving credit facility (the
"Credit Facility") in connection with the Transaction. The Credit Facility
expires on July 31, 2007, and provides for interest on outstanding borrowings at
the LIBOR rate plus 2% payable semi-annually. The Credit Facility is available
to fund working capital requirements as needed and to secure standby letters of
credit, which totaled $3,200 at March 31, 1999 and reduces available borrowing
levels. The Company had no outstanding borrowings under the Credit Facility at
March 31, 1999 and the Credit Facility is secured by substantially all of the
assets of the Company.

     The Senior Notes and Credit Facility contain numerous financial and other
covenants which include the maintenance of certain levels of earnings as
defined, restrictions on the payment of dividends and additional indebtedness as
well as other types of business activities and investments. The Company believes
that it is in material compliance with all such covenants.



                                       7
<PAGE>   8


ITEM 2.       MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND 
              RESULTS OF OPERATIONS.

FORWARD-LOOKING STATEMENTS
--------------------------

     Certain statements in this Management's Discussion and Analysis of
Financial Condition and Results of Operations ("MD&A") section and the attached
financial statements, in the Company's press releases and in oral statements
made by or with the approval of an authorized executive officer of the Company
constitute "forward-looking statements" as that term is defined under the
Private Securities Litigation Reform Act of 1995. These may include statements
projecting, forecasting or estimating the Company's performance and industry
trends. The achievement of projections, forecasts or estimates is subject to
certain risks and uncertainties. Actual results and events may differ materially
from those that were projected, forecasted or estimated. Applicable risks and
uncertainties include general economic and industry conditions that affect all
international businesses, as well as matters that are specific to the Company
and the markets it serves.

     General risks that may impact the achievement of such forecasts include:
compliance with new laws and regulations; significant raw material price
fluctuations; currency exchange rate fluctuations; business cycles; and
political uncertainties. Specific risks to the Company include the risk of
recession in the international markets and industries in which its products are
sold; the concentration of a significant portion of the Company's revenues from
customers whose equipment needs are located in the Asia-Pacific region
(Australia, China, Indonesia, Japan, Malaysia, New Zealand, Pakistan, the
Philippines, Singapore, South Korea, Taiwan, and Thailand); the concentration of
a substantial percentage of the Company's sales with a few major customers,
several of whom have significant manufacturing presence in the Asia-Pacific
region; the timing of new system orders and the timing of payments due on such
orders; changes in installation schedules, which could lead to deferral of
progress payments or unanticipated production costs; new or emerging
technologies from current competitors, customers' in-house engineering
departments and others; competition from current competitors, customers'
in-house engineering departments and others; and the emergence of a substitute
for glass. In light of these and other uncertainties, the inclusion of a
forward-looking statement herein should not be regarded as a representation by
the Company that the Company's plans and objectives will be achieved.

     The following discussion should be read in conjunction with the financial
statements and notes thereto appearing elsewhere in this report and in the
Company's Annual Report on Form 10-K for the fiscal year ended June 30, 1998, as
filed with the Securities and Exchange Commission on September 24, 1998. The
interim results of operations, historical results and percentage relationships
set forth in this MD&A section and the financial statements, including trends
that might appear, should not be taken as indicative of future operations.

GENERAL OVERVIEW
----------------

     The Company designs and assembles glass bending and tempering (i.e.,
strengthening) systems which are used by glass manufacturers and processors in
the conversion of flat glass into safety glass. Systems are sold worldwide,
primarily to automotive glass manufacturers and processors and, to a lesser
extent, to architectural glass manufacturers and processors. Revenues generated
by the sale of new systems are referred to below as "Original Equipment."

     The Company has an installed base of more than 390 systems in 45 countries
on six continents. As a result of its installed base and the relatively long
useful life of a system, the Company also engages in sales of aftermarket
products and services (retrofit of systems with upgrades, tooling used to shape
glass parts, replacement parts and technical services). Revenues generated by
these types of products are referred to below as "Aftermarket."

     In this MD&A section all dollars amounts are in thousands, unless otherwise
indicated.



                                       8
<PAGE>   9

REVENUES
--------

     For financial reporting purposes, the Company includes in income the
ratable portion of profits on uncompleted contracts determined in accordance
with the stage of completion measured by the percentage of costs incurred to
estimated total costs of each contract (generally, Original Equipment, system
retrofits and tooling). Unbilled amounts included in uncompleted contract
receivables represent revenues recognized in excess of amounts billed. Billings
in excess of costs and estimated earnings on uncompleted contracts represent
amounts billed in excess of revenues recognized. Revenue from sales other than
contracts (spare parts and engineering services) is recognized when the products
are shipped.

SELLING EXPENSES
----------------

     The Company maintains an in-house sales staff and uses the services of
commissioned agents around the world for the sale of Original Equipment and
Aftermarket products and services. In addition, the Company maintains a sales
and engineering support office in the United Kingdom. The substantial majority
of the Company's Original Equipment is sold directly to the largest glass
manufacturers and processors in the world or their affiliates.

RESEARCH & DEVELOPMENT
----------------------

     The Company believes it is the technological leader in the design and
assembly of glass bending systems. The Company works with customers to identify
product needs and market requirements. Periodically, the Company enters into
joint development agreements with customers. From time to time, the Company
allocates a portion of its research and development resources to complete the
transition from new product development to new product introduction. When the
Company does this, these expenses are charged directly to the contracts relating
to the introduction of new products. The Company considers research and
development expenses and new product introductions a very integral part of its
future success.

MANAGEMENT ESTIMATES
--------------------

     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.

     At June 30, 1998 and 1997, the estimated costs of contracts in the
Asia-Pacific region included provisions for loss exposures related to final
payments that would be due upon completion of such contracts in fiscal years
1998 and 1999. At the time these estimates were made, the Asia-Pacific region
was undergoing a period of financial instability and uncertainty that placed
receipt of these future final contract payments at risk. During the nine months
ended March 31, 1999 and 1998, the Company was successful in the collection of
final payments on contracts completed during that time. These changes in
estimates resulted in additional contract revenues of $647 and $3,306 for the
nine months ended March 31, 1999 and 1998. At March 31, 1999, the loss exposure
related to future final payments in this region is not considered significant.
These changes in cost estimates related to the Asia-Pacific Region contracts at
June 30, 1998 and 1997 had no impact on net cash provided by operating
activities since the cash payments were made as originally provided in the
underlying contracts.



                                       9
<PAGE>   10


RESULTS OF OPERATIONS
---------------------

     The following table sets forth the amounts and the percentage of total net
revenue for certain revenue and expense items for the periods indicated:


<TABLE>
<CAPTION>
                                                THREE MONTHS ENDED                       NINE MONTHS ENDED
                                                    MARCH 31,                               MARCH 31,
                                           1999                 1998                1999                 1998
                                 ---------------------------------------------------------------------------------------
<S>                                 <C>         <C>      <C>         <C>      <C>         <C>      <C>         <C>  
Net revenue (a)
     Original Equipment             $ 6,336     56.1%    $12,419     74.2%    $25,631     61.7%    $34,059     69.9%

     Aftermarket                      4,955     43.9       4,320     25.8      15,919     38.3      14,690     30.1
                                    -------    -----     -------    -----     -------    -----     -------    -----
       Total net revenue             11,291    100.0      16,739    100.0      41,550    100.0      48,749    100.0

Cost of goods sold (a)                7,130     63.1       9,002     53.8      26,035     62.7      25,332     52.0
                                    -------    -----     -------    -----     -------    -----     -------    -----
Gross profit                          4,161     36.9       7,737     46.2      15,515     37.3      23,417     48.0
Selling, general and                  1,951     17.3       2,713     16.2       6,761     16.3       8,153     16.7
administrative
Research and development expense        781      6.9       1,067      6.4       2,663      6.4       3,073      6.3
Amortization expense (b)              1,061      9.4       1,088      6.5       3,182      7.6       3,267      6.7
                                    -------    -----     -------    -----     -------    -----     -------    -----
         Operating profit           $   368      3.3%    $ 2,869     17.1%    $ 2,909      7.0%    $ 8,924     18.3%
                                    =======    =====     =======    =====     =======    =====     =======    =====

Amortization expense (b)              1,061      9.4       1,088      6.5       3,182      7.6       3,267      6.7
Depreciation expense                    342      3.0         414      2.5       1,153      2.8       1,239      2.5
                                    -------    -----     -------    -----     -------    -----     -------    -----
         EBITDA                     $ 1,771     15.7%    $ 4,371     26.1%    $ 7,244     17.4%    $13,430     27.5%
                                    =======    =====     =======    =====     =======    =====     =======    =====
</TABLE>

(a) Contract revenues and cost of goods sold are recognized on a percentage
    completion basis measured by the percentage of costs incurred to the
    estimated total costs of each contract.
(b) Amortization expense excludes the amortization of deferred financing costs,
which is included with interest expense.

THREE MONTHS ENDED MARCH 31, 1999 COMPARED WITH THE THREE MONTHS ENDED MARCH 31,
1998

     Net revenue for the three months ended March 31, 1999 decreased $5,448, or
32.5%, to $11,291 from $16,739 for the three months ended March 31, 1998.
Original Equipment revenue decreased $6,083, or 49.0%, to $6,336 for the three
months ended March 31, 1999 compared to $12,419 for the three months ended March
31, 1998. The continuing economic difficulties in the Asia-Pacific and other
foreign regions have adversely impacted new contract signings for Original
Equipment in fiscal 1999, resulting in a decrease in Original Equipment revenue.
Aftermarket revenue increased $635, or 14.7% to $4,955 for the three months
ended March 31, 1999 from $4,320 for the three months ended March 31, 1998. The
increase in aftermarket revenue was the result of an increase in tooling and
replacement parts revenue, partially offset by a decline in retrofit revenue.

     A significant portion of the Company's net revenue is generated from
customers outside the United States. For the three months ended March 31, 1999,
Original Equipment revenue from foreign customers was $3,348 (52.8% of total
Original Equipment revenue) as compared to $8,351 (67.2% of total Original
Equipment revenue) for the three months ended March 31, 1998. For the three
months ended March 31, 1999 and 1998 approximately 34.8% and 44.8%,
respectively, of the Company's net revenue was derived from sales of products to
customers located in the Asia-Pacific region. The percentage of aftermarket
revenue from foreign customers decreased to 51.1% of total aftermarket revenue
for the three months ended March 31, 1999 compared to 75.0% for the three months
ended March 31, 1998. The portion of the Company's net revenue generated from
customers outside the United States can fluctuate from time to time depending on
location of contract signings.

     Gross profit decreased $3,576, or 46.2%, to $4,161 for the three months
ended March 31, 1999 as compared to $7,737 for the three months ended March 31,
1998. The gross margin decreased to 36.9% from 46.2% as a result of a shift in
the current product mix from higher margin automotive contracts to lower margin
architectural contracts and developmental (first of a kind) automotive
contracts, which generally carry lower margins. While the Company continues to
reduce and minimize its production costs (including factory overhead) gross
margins have decreased, in part, as a result of fixed factory overhead being
applied to lower production volume. Based upon current operating results and the
currently expected product mix and related percentage of completion, management
believes the gross margins for fiscal 1999, will be lower than the gross margins
for fiscal 1998.


                                       10
<PAGE>   11


     Selling, general and administrative expenses decreased $762, or 28.1%, to
$1,951 for the three months ended March 31, 1999 as compared to $2,713 for the
three months ended March 31, 1998. This decrease was primarily the result of
lower incentive compensation costs due to decreased earnings and other cost
containment measures implemented (including manpower reductions) in all areas of
the Company.

     Research and development expenses decreased $286, or 26.8%, to $781 for the
three months ended March 31, 1999 as compared to $1,067 for the three months
ended March 31, 1998. This decrease was primarily the result of the dedication
of certain developmental resources to the completion of certain original
equipment contracts and other cost containment measures implemented (including
manpower reductions) in all areas of the Company.

     Amortization expense was $1,061 for the three months ended March 31, 1999
and $1,088 for the three months ended March 31, 1998.

     Operating profit decreased $2,501, or 87.2%, to $368 for the three months
ended March 31, 1999 as compared to $2,869 for the three months ended March 31,
1998. Operating profit as a percentage of revenue, was 3.3% for the three months
ended March 31, 1999 and 17.1% for the three months ended March 31, 1998. The
decrease in operating profit was the result of the decline in gross profit
partially offset by decreases in selling, general and administrative expenses
and research and development expenses.

     Interest expense was $2,417 for the three months ended March 31, 1999 and
$2,414 for the three months ended March 31, 1998.

     No income tax expense or benefit has been provided in the three months
ended March 31, 1999 due to the recorded loss and the uncertainty related to the
future realization of such amounts. The effective tax rate for the three months
ended March 31, 1998 was 81.6%. The Company's effective tax rates differ from
the statutory rate due primarily to goodwill amortization, which is not
deductible for income tax purposes, and the effects of not recognizing the
income tax benefit of recorded losses.

     Net loss was $2,006 for the three months ended March 31, 1999 compared to
net income of $106 for the three months ended March 31, 1998. The net loss was
the result of the decline in operating profit.

     EBITDA, which is defined as operating profit plus depreciation and
amortization, was $1,771 for the three months ended March 31, 1999 compared to
$4,371 for the three months ended March 31, 1998. The decrease in EBITDA was the
result of the decline in operating profit.

NINE MONTHS ENDED MARCH 31, 1999 COMPARED WITH THE NINE MONTHS ENDED MARCH 31,
1998

     Net revenue for the nine months ended March 31, 1999 decreased $7,199, or
14.8%, to $41,550 from $48,749 for the nine months ended March 31, 1998.
Original Equipment revenue decreased $8,428, or 24.7%, to $25,631 for the nine
months ended March 31, 1999 compared to $34,059 for the nine months ended March
31, 1998. The continuing economic difficulties in the Asia-Pacific and other
foreign regions have adversely impacted new contract signings of Original
Equipment in fiscal 1999; resulting in a decrease in Original Equipment revenue.
However, revenues from the United Sates and Europe have partially offset this
impact. Aftermarket revenue increased $1,229, or 8.4% to $15,919 for the nine
months ended March 31, 1999 from $14,690 for the nine months ended March 31,
1998. The increase in aftermarket revenue was the result of an increase in
retrofit and tooling revenue.

     For the nine months ended March 31, 1999, Original Equipment revenue from
foreign customers was $12,526 (48.9% of total Original Equipment revenue) as
compared to $23,989 (70.4% of total Original Equipment revenue) for the nine
months ended March 31, 1998. For the nine months ended March 31, 1999 and 1998
approximately 29.8% and 46.2%, respectively, of the Company's net revenue was
derived from sales of products to customers located in the Asia-Pacific region.
As sales in the Asia-Pacific region declined in fiscal 1999, sales in the United
States and Europe have increased. The percentage of aftermarket revenue from
foreign customers decreased to 61.6% of total aftermarket revenue for the nine
months ended March 31, 1999 compared to 69.6% for the nine months ended March
31, 1998. The portion of the Company's net revenue generated from customers
outside the 



                                       11
<PAGE>   12


United States can fluctuate from time to time depending on location of contract
signings.

     Gross profit decreased $7,902, or 33.7%, to $15,515 for the nine months
ended March 31, 1999 as compared to $23,417 for the nine months ended March 31,
1998. The gross margin decreased to 37.3% from 48.0% as a result of a shift in
the current product mix from higher margin automotive contracts to lower margin
architectural contracts and developmental (first of a kind) automotive
contracts, which generally carry lower margins. While the Company continues to
reduce and minimize its production costs (including factory overhead) gross
margins have decreased, in part, as a result of fixed factory overhead being
applied to lower production volume. Based upon current operating results and the
currently expected product mix and related percentage of completion, management
believes the gross margins for fiscal 1999 will be lower than the gross margins
for fiscal 1998.

     Selling, general and administrative expenses decreased $1,392, or 17.1%, to
$6,761 for the nine months ended March 31, 1999 as compared to $8,153 for the
nine months ended March 31, 1998. This decrease was primarily the result of
lower incentive compensation costs due to decreased earnings and other cost
containment measures implemented (including manpower reductions) in all areas of
the Company.

     Research and development expenses decreased $410, or 13.3% to $2,663 for
the nine months ended March 31, 1999 as compared to $3,073 for the nine months
ended March 31, 1998. This decrease was primarily the result of the dedication
of certain developmental resources to the completion of certain original
equipment contracts and other cost containment measures implemented (including
manpower reductions) in all areas of the Company.

     Amortization expense was $3,182 for the nine months ended March 31, 1999
and $3,267 for the nine months ended March 31, 1998.

     Operating profit decreased $6,015, or 67.4%, to $2,909 for the nine months
ended March 31, 1999 as compared to $8,924 for the nine months ended March 31,
1998. Operating profit as a percentage of revenue, was 7.0% for the nine months
ended March 31, 1999 and 18.3% for the nine months ended March 31, 1998. The
decrease in operating profit was the result of the decline in gross profit
partially offset by decreases in selling, general and administrative expenses
and research and development expenses.

     Interest expense was $7,251 for the nine months ended March 31, 1999 and
$7,217 for the nine months ended March 31, 1998.

     No income tax expense or benefit has been provided in the nine months ended
March 31, 1999 due to the recorded loss and the uncertainty related to the
future realization of such amounts. The effective tax rate for the nine months
ended March 31, 1998 was 81.5%. The Company's effective tax rates differ from
the statutory rate due primarily to goodwill amortization, which is not
deductible for income tax purposes, and the effects of not recognizing the
income tax benefit of recorded losses.

     Net loss was $4,064 for the nine months ended March 31, 1999 compared to
net income of $383 for the nine months ended March 31, 1998. The net loss was
the result of the decline in operating profit.

     EBITDA, which is defined as operating profit plus depreciation and
amortization, was $7,244 for the nine months ended March 31, 1999 compared to
$13,430 for the nine months ended March 31, 1998. The decrease in EBITDA was the
result of the decline in operating profit.

LIQUIDITY AND CAPITAL RESOURCES
-------------------------------

     The Company's liquidity and capital resources were significantly impacted
by the Transaction. The Company's primary sources of liquidity are funds
provided by operations and amounts available under the Credit Facility. The
Senior Notes do not require any principal payments prior to maturity. The Credit
Facility is available to fund working capital requirements as needed and to
secure standby letters of credit, which totaled $3,200 at March 31, 1999, and
reduces available borrowing levels. The Company had no outstanding borrowings
under the Credit 



                                       12
<PAGE>   13


Facility at March 31, 1999 and the Credit Facility is secured by substantially
all of the assets of the Company.

     Net cash provided by operating activities can vary significantly from
quarter to quarter due to the number of new system signings and the amount and
timing of new system payments. In most instances, progress payments on new
system orders are invoiced or received in advance of revenue recognition. When
progress payments are invoiced or received in advance of such revenue
recognition, the Company increases current liabilities represented by its
billings in excess of costs and estimated earnings on uncompleted contracts.
When the revenue is earned, the Company recognizes the revenue and reduces the
billings in excess of costs and estimated earnings on uncompleted contract
balances. Net cash used by operating activities for the nine months ended March
31, 1999 was $10,332 whereas for the nine months ended March 31, 1998, net cash
provided by operating activities was $8,635. The decrease in net cash provided
by operating activities for the nine months ended March 31, 1999 was due in part
to fewer new system signings, the timing of new system payments and to the
interest payments totaling $8,925 made on July 1, 1998 and January 1, 1999. Only
one interest payment of $4,438 was required for the nine months ended March 31,
1998.

     The Company has a backlog (on a percentage of completion basis) at March
31, 1999 of approximately $13,279 as compared to $34,848 at June 30, 1998. The
Company expects to complete this backlog within the next twelve months. The
decrease in backlog is the result of the continuing economic difficulties in the
Asia-Pacific and other foreign regions, which have adversely impacted contract
signings of Original Equipment in fiscal 1999.

     Capital expenditures, including demonstration furnaces classified as fixed
assets, were $10 for the nine months ended March 31, 1999 and $234 for the nine
months ended March 31, 1998. In addition, during the first quarter of fiscal
1999 certain non-contract furnace inventory, with a value of $1,271, was
transferred to demonstration furnaces. Future capital expenditures, excluding
demonstration furnaces, used to replace or improve operating equipment and
facilities are estimated to be less than $500 for the year. In addition, the
Company intends to make periodic replacements and improvements on demonstration
furnaces, which are used for customer demonstrations and research and
development purposes. Demonstration furnaces, which outlive their usefulness for
customer demonstrations or research and development purposes, or both, may be
refurbished and sold or put to other applicable uses.

     As of June 30, 1998, the Company had net operating loss ("NOL")
carryforwards for regular and alternative minimum tax purposes of approximately
$35,703 and $32,311, respectively, which expire in the years 2009 through 2013.
These NOL's are subject to annual usage limitations which, if not utilized in a
given year, may be utilized in a subsequent year.

     Although the Company's ability to generate cash has been affected by the
increased interest costs resulting from the Transaction and, more recently, from
fewer new system signings, management believes that internally generated funds,
together with amounts available under the Credit Facility, will be sufficient to
satisfy the Company's operating cash and capital expenditure requirements, make
required payments under the Credit Facility and make scheduled interest payments
on the Senior Notes. However, the ability of the Company to satisfy its
obligations will ultimately be dependent upon the Company's future financial and
operating performance and upon its ability to renew or refinance borrowings or
to raise additional equity capital as necessary. The Company's business is
subject to rapid fluctuations due to changes in the world markets for the end
products produced by its equipment (largely in the cyclical markets of
automobiles and construction), currency fluctuations, the local economies of
those countries where users and potential users of the Company's equipment are
located, geopolitical events and other macroeconomic forces largely beyond the
ability of the Company to predict or control. Except as discussed below,
management is not currently aware of any trends, demands, commitments or
uncertainties which will or which are reasonably likely to result in a material
change in the Company's liquidity.

     During fiscal 1997, 1998 and for the nine months ended March 31, 1999
approximately 59.2%, 39.7% and 29.8% of the Company's net revenue was derived
from sales of products to customers located in the Asia-Pacific region
(Australia, China, Indonesia, Japan, Malaysia, New Zealand, Pakistan, the
Philippines, Singapore, South 




                                       13
<PAGE>   14


Korea, Taiwan, and Thailand). Given the continuing significant economic
uncertainties facing this region, and the impact of those uncertainties on
customers' capital expenditure plans and local demand for the products
manufactured by the Company's customers in that region, the Company cannot
predict with any degree of certainty what final impact the economic issues
facing the Asia-Pacific region will ultimately have on the Company's future
contract signings.

     Management believes the current economic uncertainties in the Asia-Pacific
region indicate that the timing of orders for the Company's products will be
adversely affected. The impact of this situation on fiscal 1999 financial
performance has been somewhat mitigated by offsetting equipment sales to
customers in other regions of the world. However, given the inherent difficulty
in predicting with certainty the timing of contract signings and geographic
areas into which equipment will be delivered in fiscal 2000 and beyond, the
ultimate severity of the impact of this situation on the Company's financial
performance in fiscal 2000 and beyond is impossible to predict. The Company will
continue to monitor the situation in the Asia-Pacific region. Notwithstanding
the current economic conditions in the Asia-Pacific region, the Company believes
that given world demographics and long term economic trends, the Asia-Pacific
region will continue to represent a significant market for the Company's
products and it intends to continue its presence in this area.

YEAR 2000 COMPLIANCE

     Since March, 1998, the Company has had a committee reviewing issues and
problems relating to potential year 2000 problems which may arise because
computers, software and firmware programs, applications and information
technology systems (the "IT Systems") and items with embedded microchips (the
"Non-IT Systems" and, together with the IT Systems, the "Systems") only utilize
two digits to refer to a year. The Company has recognized that this year 2000
problem may cause many of the Systems to fail or perform incorrectly because
they will not properly recognize a year that begins with "20" instead of the
familiar "19." If a computer system or software application used by the Company
or by a third party dealing with the Company fails because of the inability of
the system to properly read the year "2000," this failure could have a material
adverse effect on the Company.

     The Company's review and assessment of the year 2000 problem has focused on
four primary areas: (i) the Systems and their relationship to the Company's
operations, (ii) Glasstech systems currently being used by the Company's
customers and currently being sold by the Company, (iii) compliance by the
Company's largest suppliers, and (iv) compliance by the suppliers of the
Company's building and utility systems. The Company has not incurred, and does
not anticipate incurring, material costs related to year 2000 compliance.

The Systems

     The Company has completed its review of the Systems, including both the IT
Systems and the Non-IT Systems. In reviewing the Systems, the Company found that
some of them were not year 2000 compliant. The Company has purchased and
installed upgraded versions of the IT Systems, including the software programs
used for financial reporting, purchasing, order entry, payroll and product
design/development that the Company has been assured are year 2000 compliant by
the vendors of those programs. The majority of these upgrades were completed by
December 1998 and the final upgrade will be completed by August 1999. The
Company believes that, with the exception of one of its computer-aided design
("CAD") systems, its manufacturing and design operations are year 2000
compliant. The Company has completed its review of the non-compliant CAD system
and is expected to have an upgraded version operational by August 1999.

     Although there can be no assurance that the Company has identified and
corrected, or will identify and correct, every year 2000 problem found in the
Systems, the Company believes that it has a comprehensive program in place to
identify and correct any such problems. The Company does have contingency plans
developed in the event of a failure in any of the Systems.



                                       14
<PAGE>   15

Glasstech Systems

     The Company assessed the year 2000 compliance of the Glasstech systems
currently in service. The Company determined that the majority of the Glasstech
systems currently in service should continue to operate after the year 2000;
however, the internal date function on certain systems may not perform properly,
which would require the end-user of a Glasstech system to make certain manual
changes to the maintenance reports printed by the system. The Company has
identified one type of software within certain Glasstech systems which, if not
properly reset, may cause this type of Glasstech system to fail. The Company has
addressed the year 2000 problems in all of the Glasstech systems currently being
sold, and has put out a service bulletin on the Glasstech systems currently in
service to inform customers of the problems. The Company has made software and
hardware upgrades available to its customers that address these problems.

Suppliers

     The Company has completed a program to determine the year 2000 compliance
efforts of its equipment and raw materials suppliers. The Company sent out
questionnaires to its 47 largest suppliers and the Company has received
responses from all of these suppliers. This program has not revealed any
material problems. Unfortunately, the Company cannot fully control the conduct
of its suppliers, and there can be no guarantee year 2000 problems originating
with a supplier will not occur. The Company believes that it has made adequate
arrangements with backup suppliers to avoid any material adverse effect that
would occur if one of its primary suppliers were unable to fill the Company's
orders for any reason, including as a result of year 2000 problems.

Building and Utility Suppliers

     The Company has completed reviews of its building and utility systems (gas,
electrical, telephone, etc.) for the impact of the year 2000 problem. These
suppliers have stated they are year 2000 compliant. If the Company did not
receive utility service from certain of these suppliers, the Company may be
unable to produce Glasstech systems or take orders for new systems. While the
Company continues working diligently with all of its utility suppliers and has
no reason to expect that they will not be able to provide service after the year
2000, there can be no assurance that these suppliers will be able to meet the
Company's requirements. In the case of these suppliers, an acceptable
contingency plan has not yet been developed. Because of the nature of these
suppliers and the fact that they are often the only suppliers of a given service
available in the Company's geographic region, management believes that it may
prove impossible to develop an acceptable contingency plan for certain of the
building and utility systems. The failure of any such supplier to fully
remediate its systems for year 2000 compliance could cause a shut down of the
Company's manufacturing and design facility, which could impact the Company's
ability to meet its obligations to supply Glasstech systems to its customers and
could have a material adverse affect on the Company.



                                       15
<PAGE>   16


                           PART II - OTHER INFORMATION


ITEM 1.  LEGAL PROCEEDINGS

     The Company is subject to legal proceedings and claims that arise in the
ordinary course of business. In the opinion of management, the amount of any
ultimate liability with respect to these actions will not materially affect the
financial statements of the Company.

ITEM 5.  OTHER INFORMATION

     The Company may, from time to time, repurchase its Senior Notes in the open
market, in privately negotiated transactions or by other means, depending on
market conditions. To date, the Company has not purchased any Senior Notes.

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

(a)  Exhibits
     --------
     2.1-a     Agreement and Plan of Merger 
     2.2-a     Amendment to Agreement and Plan of Merger 
     3.1-a     Restated Certificate of Incorporation of the Registrant 
     3.2-a     By-laws of the Registrant
     4.1-a     Indenture (including form of Note) 
     4.2-a     First Supplemental Indenture
     10.1-a    Financing and Security Agreement between NationsBank, N.A. and 
               the Registrant
     10.1.1-b  Second Amendment to Financing and Security Agreement between 
               NationsBank N.A. and the Registrant
     10.2-a    Plant and Office Lease
     10.3-a    Warehouse Lease
     10.4-a    Advisory Agreement between the Registrant and Key Equity Capital 
               Corporation
     10.5-a    Form of Exchange Agent Agreement between United States Trust 
               Company of New York and the Registrant
     10.6-a    Employment Agreement among Glasstech Holding Co., the Registrant 
               and John S. Baxter
     10.7-a    Employment Agreement among Glasstech Holding Co., the Registrant 
               and Mark D. Christman
     10.8-a    Employment Agreement among Glasstech Holding Co., the Registrant 
               and Larry E. Elliott
     10.9-a    Employment Agreement among Glasstech Holding Co., the Registrant 
               and Ronald A. McMaster
     10.10-a   Employment Agreement among Glasstech Holding Co., the Registrant 
               and James P. Schnabel, Jr.
     10.11-a   Employment Agreement among Glasstech Holding Co., the Registrant 
               and Diane S. Tymiak
     10.12-a   Employment Agreement among Glasstech Holding Co., the Registrant 
               and Kenneth H. Wetmore
     10.13-a   Securities Purchase Agreement between the Registrant, as 
               successor to Glasstech Sub Co., and CIBC Wood Gundy Securities 
               Corp.
     10.14-a   Registration Rights Agreement between the Registrant, as
               successor to Glasstech Sub Co., and CIBC Wood Gundy Securities
               Corp.
     27.1*     Financial Data Schedule

     a  - Incorporated by reference from the Company's Registration Statement on
        Form S-4 (Registration No. 333-34391) (the "Form S-4") filed on August
        26, 1997. Each of the above exhibits has the same exhibit number in the
        Form S-4.

     b  - Incorporated by reference from the Company's Quarterly Report on Form
        10-Q for the quarter ended December 31, 1998 using the same exhibit
        number as above.

     ** Filed herewith.

(b) No reports on Form 8-K were filed during the fiscal quarter covered by this
report.


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<PAGE>   17


                                   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.



                                      GLASSTECH, INC., a Delaware Corporation

Date:  May 12, 1999                            /s/  Mark D. Christman
    ---------------                   ------------------------------------------
                                                  MARK D. CHRISTMAN
                                         President and Chief Executive Officer


                                               /s/  Diane S. Tymiak
                                                   DIANE S. TYMIAK
                                      ------------------------------------------
                                      Vice President and Chief Financial Officer
                                          (Principal Accounting Officer)



                                       17