<PAGE>


                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549


                                  FORM 10-K/A
(Mark One)
[X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
     ACT OF 1934

     For the fiscal year ended April 30, 2001

                                      OR

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

     For the Transition period from _________ to _________.

                        Commission file number: 0-16115


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

              Delaware                                    91-1039211
  (State or other jurisdiction of          (I.R.S. Employer Identification No.)
  incorporation or organization)

                16804 Gridley Place, Cerritos, California 90703
         (Address of principal executive offices, including zip code)

                                (562) 860-6666
             (Registrant's telephone number, including area code)


          Securities registered pursuant to Section 12(b) of the Act:

     Title of each class               Name of each exchange on which registered
     -------------------               -----------------------------------------
             None                                        N/A

          Securities registered pursuant to Section 12(g) of the Act:

                   Common Stock, $0.001 par value per share


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

     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment the
Form 10-K. [_]

     The aggregate market value of the Common Stock held by non-affiliates of
the Registrant as of August 24, 2001 was approximately $179,635,348 based upon
the closing sale price of the Registrant's Common Stock on such date, as
reported on the Nasdaq National Market. Shares of Common Stock held by each
executive officer and director and each person owning more than 10% of the
outstanding Common Stock of the Registrant have been excluded in that such
persons may be deemed to be affiliates of the Registrant. This determination of
affiliate status is not necessarily a conclusive determination for other
purposes.

     As of August 24, 2001, the Registrant had 10,511,138 shares of Common
Stock, $.001 par value per share, outstanding.


1
<PAGE>

                                   PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

     The following table sets forth certain information regarding our directors
and executive officers as of July 31, 2001:

<TABLE>
<CAPTION>
     Name                                                       Age    Position
     ----                                                       ---    --------
<S>                                                             <C>    <C>
     Robert M. Stemmler.....................................     65    Chairman of the Board of Directors, President and
                                                                       Chief Executive Officer
     Dale L. Rasmussen......................................     51    Senior Vice President and Secretary
     Syed Hussain...........................................     48    Vice President of Technology and Quantum
                                                                       Division
     Dennis D. Hartman......................................     58    Vice President of the Gaseous Fuel Products Division
     Donald L. Dominic......................................     59    Vice President and General Counsel
     William B. Olson.......................................     38    Vice President, Treasurer and Chief Financial
                                                                       Officer
     Norman L. Bryan (1)....................................     59    Director
     Paul Mlotok (1)........................................     56    Director
     J. David Power III (2)(3)..............................     70    Director
     Don J. Simplot (2)(3)..................................     65    Director
</TABLE>

_______________
(1) Member of the Audit Committee
(2) Member of the Compensation Committee
(3) Member of the Nominating Committee

     Robert M. Stemmler has served as our President and Chief Executive Officer
since May 1993. He has also been a director since May 1993, and the Chairman of
our Board of Directors since June 1998. From December 1992 until July 1993, Mr.
Stemmler was a full time consultant to our company. He served as our General
Manager from 1982 to 1985 and has held various management and executive
positions throughout his career at Celanese Corp. (now Hoechst-Celanese), an
international chemical and fibers manufacturer; A.J. Industries, a holding
company for aircraft, trucking and heating equipment companies; and Sargent
Fletcher Company, a manufacturer of military aircraft fuel tanks and in-flight
refueling systems. Mr. Stemmler is a director of Pacific Aerospace &
Electronics, Inc., an international manufacturer of aerospace and electronic
components. He holds an M.B.A. degree from Seton Hall University and a B.S.
degree in mechanical engineering from Washington University.

     Dale L. Rasmussen has served as our Senior Vice President and Secretary
since June 1989. He joined us in April 1984 as Vice President of Finance and
Administration and Corporate Secretary. Prior to joining us, Mr. Rasmussen was a
commercial banker for 12 years at banks that were acquired by Key Bank and U.S.
Bank. Mr. Rasmussen is a director of Pacific Aerospace & Electronics, Inc., an
international manufacturer of aerospace and electronic components. He received
his B.A. degree in Business Administration and Economics from Western Washington
University and is a graduate of the Pacific Coast Banking School.

     Syed Hussain has served as our Vice President of Technology and our Quantum
division since November 1996. Prior to joining us in 1992, Mr. Hussain worked
for General Motors Saturn, Eaton and Bendix (Allied Signal). He has over 18
years of automotive experience in engines, emission controls, powertrain and
related electronic and electromechanical devices. Mr. Hussain holds an M.S.E.E.
degree from Illinois Institute of Technology in Chicago, Illinois and a B.S.E.E.
degree from the University of Engineering and Technology in Pakistan.

     Dennis D. Hartman has served as our Vice President and General Manager in
charge of the Gaseous Fuel Products division since April 1997. From January 1996
until joining us in April 1997, Mr. Hartman was the Operating Manager and a
director of Columbia River Homes of Astoria, Oregon, a manufacturer of modular
homes. Prior to holding that position, Mr. Hartman was a Vice President of Nacco
Material Handling, Inc., a manufacturer of lift trucks and worked in finance for
the Ford Motor Company. Mr. Hartman is a graduate of the University of
California, Berkeley. He holds an M.B.A. degree in finance from that
institution.

     Donald L. Dominic has served as our Vice President, General Counsel and
Director of Human Resources since June 1998 and is also our Assistant Secretary.
Prior to joining us in 1994, Mr. Dominic held various management and technical
positions with Honeywell, Hughes and Sargent-Fletcher Company. Mr. Dominic holds
a


<PAGE>


B.S.E.E. degree from the University of Illinois, an M.S.E.E. from West Coast
University, an M.B.A. degree from the University of Southern California, and a
J.D. from the University of La Verne.

     William B. Olson has served as our Treasurer and Chief Financial Officer
since July 1999. He originally joined us in October 1994 and has held various
financial positions with us, including serving as Corporate Controller. Between
November 1996 and April 1997, Mr. Olson served as manager of financial planning
at Autobytel. Prior to joining us, Mr. Olson was with the public accounting firm
of Ernst & Young and its Kenneth Leventhal Group. Mr. Olson holds a B.S. degree
in business and operations management from Western Illinois University and an
M.B.A. degree in finance and economic policy from the University of Southern
California. Mr. Olson is a Certified Financial Manager and a Certified
Management Accountant.

     Norman L. Bryan has served as a director since November 1993 and is Chair
of the Audit Committee. He has been a consultant since January 1995. Mr. Bryan
has been employed as the Senior Vice President of Sales and Marketing of EIT,
Inc., an electric meter manufacturing company, since October 1998. Prior to
retiring in 1994 from Pacific Gas and Electric Company, he was Vice President,
Marketing from February 1993 until December 1994, and was Vice President, Clean
Air Vehicles from February 1991 to February 1993. Mr. Bryan holds an M.A. degree
in business from Stanford University and a B.S.M.E. degree in mechanical
engineering from California State University in San Jose.

     Paul Mlotok has served as a director since April 1997 and is a member of
the Audit Committee. Since 1995, he has been a Senior Practitioner with the
consulting firm Global Business Network, which specializes in the areas of
energy, natural resources and finance. From 1989 to 1995, he was a Principal and
oil industry analyst at Morgan Stanley & Co. He has a B.A. degree in economics
from Cornell University and a Ph.D. in economics from Brown University.

     J. David Power III has served as a director since August 2000. He is the
founder of J.D. Power and Associates where he has served as Chairman since 1996.
Mr. Power has previously worked with Ford Motor Company, General Motors
Corporation, and J.I. Case Company. Mr. Power was a recipient of the Automotive
Hall of Fame's Distinguished Service Citation. Mr. Power serves as a director of
The Cobalt Group, Inc. Mr. Power graduated from the College of Holy Cross, has
an M.B.A. from The Wharton School of Finance at the University of Pennsylvania,
and holds honorary doctorate degrees from College of the Holy Cross, California
Lutheran University, and California State University, Northridge.

     Don J. Simplot has served as a director since May 1978 and is Chair of the
Compensation Committee. He is the President of Simplot Industries, Inc., which
is engaged in agricultural enterprises, and a Director member of the office of
the chair of J.R. Simplot Company, which is also engaged in agricultural
enterprises. Mr. Simplot is a director of Micron Technology, Inc., a designer
and manufacturer of semiconductor memory components primarily used in various
computer applications.

The Board of Directors is divided into three classes, each consisting of three
directors, with the three classes serving staggered three year terms. Each
director will hold office until the first meeting of stockholders immediately
following expiration of his three year term of office and until his successor is
qualified and elected.

Section 16(a) Beneficial Ownership Reporting Compliance

     Section 16(a) of the Securities Exchange Act of 1934 requires the Company's
Directors and executive officers, and persons who own more than 10% of the
Company's Common Stock to file with the Securities and Exchange Commission
("SEC") initial reports of ownership and reports of changes in ownership of
Common Stock and other equity securities of the Company. Executive officers,
Directors and greater than 10% stockholders are required by SEC regulation to
furnish the Company with copies of all Section 16(a) reports they file. To the
Company's knowledge, based solely on review of the copies of such reports
furnished to the Company or advice that no filings were required, during fiscal
year 2001 all executive officers, Directors and greater than 10% beneficial
owners complied with the Section 16(a) filing requirements, except that Doug
Toms failed to report three transactions on Form 4 and subsequently reported
those transactions on a Form 5, and each of our executive officers and directors
filed late Form 5s reporting option grants they received during the 2001 fiscal
year.
<PAGE>

ITEM 11. EXECUTIVE COMPENSATION

     The following table sets forth all compensation paid or accrued during each
of the Company's last three fiscal years to the Company's chief executive
officer and the Company's four other most highly compensated executive officers
whose annual compensation exceeded $100,000 for the last fiscal year (the "Named
Executive Officers").

                          Summary Compensation Table

<TABLE>
<CAPTION>
                                                                                     Long-Term
                                                          Annual Compensation       Compensation
                                                                                     Securities
                                                                                     Underlying           All Other
     Name and Principal Position               Year     Salary($)(1)   Bonus($)     Options(2)(#)      Compensation($)
     ---------------------------               ----     -----------    --------     ------------       --------------
<S>                                            <C>      <C>           <C>           <C>                <C>
     Robert M. Stemmler.....................    2001      $332,423    $101,000          20,520           $68,016(3)
       President and Chief                      2000       308,233     127,000             452            39,164
       Executive Officer                        1999       239,255     120,000             476            33,439

     Dale L. Rasmussen......................    2001      $133,789    $ 28,000          10,440           $19,804(4)
       Senior Vice President                    2000       125,000      33,000             452            15,885
       and Secretary                            1999       103,885      22,000               0            15,763

     Syed Hussain...........................    2001      $250,962   $ 194,200          40,000           $12,135(5)
       Vice President of Technology             2000       203,846      49,000          10,000            12,198
       and Quantum Division                     1999       159,615      27,000              --            12,261

     William B. Olson.......................    2001      $142,500    $ 36,000          20,000           $13,263(6)
       Vice President                           2000       121,638      41,000          20,000             4,046
       and Chief Financial Officer              1999        81,938      11,000              --               846

     Dennis D. Hartman......................    2001      $183,116    $ 23,000           6,166           $21,561(7)
       Vice President of Gaseous Fuel           2000       170,000      45,000          20,153            19,131
       Products Division                        1999       120,769      37,000             112             1,575
</TABLE>

__________________
(1)  Includes amounts deferred by executive officers pursuant to the Employee
     Savings Plan and Deferred Compensation Plan.

(2)  Includes options under the Company's Incentive Stock Option Plans.

(3)  Includes a group term life insurance premium of $19,892, an automobile
     allowance of $12,000, a matching contribution of $5,492 pursuant to the
     Employee Savings Plan, a matching contribution of $12,613 pursuant to the
     Deferred Compensation Plan, a Company-paid car lease of $17,029, and $990
     of tax preparation and planning fees.

(4)  Includes a group term life insurance premium of $1,170, a matching
     contribution of $2,307 pursuant to the Employee Savings Plan, a matching
     contribution of $4,327 pursuant to the Deferred Compensation Plan and an
     automobile allowance of $12,000.

(5)  Includes a group term life insurance premium of $135 and an automobile
     allowance of $12,000.

(6)  Includes a group term life insurance premium of $81, a matching
     contribution of $6,720 pursuant to the Employee Savings Plan, an automobile
     allowance of $6,462.

(7)  Includes a group term life insurance premium of $387, a matching
     contribution of $5,985 pursuant to the Employee Savings Plan, a matching
     contribution of $3,189 pursuant to the Deferred Compensation Plan and an
     automobile allowance of $12,000.

<PAGE>

                     Option/Grants During Fiscal Year 2001

     The following table describes the options to acquire shares of our Common
Stock that were granted to the Named Executive Officers in fiscal year 2001:

<TABLE>
<CAPTION>
                                                      Individual Grants                    Potential Realizable
                                       ------------------------------------------------
                                       Number of     % of Total                              Value at Assumed
                                       Securities      Options     Exercise               Annual Rates of Stock
                                       Underlying    Granted to     or Base               Price Appreciation for
                                        Options     Employees in     Price   Expiration       Option Term(3)
                                                                                              --------------
     Name                              Granted(1)  Fiscal Year(2)   ($/Sh)      Date       5%($)        10%($)
     ----                              ---------   -------------    ------      ----       -----        -----
<S>                                    <C>         <C>              <C>       <C>        <C>           <C>
     Robert M. Stemmler..............    20,000         5.6%         $10.75   12/20/10   $ 135,208     $ 342,656
                                            520(4)       *            12.00    1/2/11        3,924         9,943
     Dale L. Rasmussen...............    10,000         2.8%          10.75   12/20/10      67,603       171,328
                                            440(4)       *            12.00    1/2/11        3,321         8,413
     Syed Hussain....................    20,000         5.6%          10.75   12/20/10     135,208       342,656
                                         20,000         5.6%          14.31    3/21/11     179,990       456,126
     William B. Olson................    20,000         5.6%          10.75   12/20/10     135,208       342,656
     Dennis D. Hartman...............     6,000         1.7%          10.75   12/20/10      40,561       102,797
                                            166(4)       *            12.00    1/2/11        1,253         3,173
</TABLE>

__________________
 *   Less than 1%

(1)  Options are granted at the fair market value of our Common Stock on the
     date of grant and vest cumulatively at the rate of 40% after the first two
     years following the date of the grant and 20% each year thereafter so that
     the employee is 100% vested after five years. However, if employment
     terminates due to death or disability, retirement at or after age 62, or
     termination without cause, then options vest at the rate of 25% for each
     full calendar year of employment. Options may be exercised only while an
     optionee is employed by us, or within three months following termination of
     employment. If termination results from death or disability, options may be
     exercised within one year of the termination date. In no event may options
     be exercised more than ten years after date of grant. In the event of a
     change of control of the Company, the Board may in its sole discretion give
     all or certain optionees the right to exercise all or any portion of their
     unvested options.

(2)  Based on an aggregate of 356,453 options granted to employees during the
     fiscal year.

(3)  The 5% and 10% assumed annual rates of compounded stock price appreciation
     are mandated by rules of the Securities and Exchange Commission and do not
     represent our estimate or projection of our future common stock prices.

(4)  Represents options granted to officers participating in the Deferred
     Compensation Plan. We matched 50% of each participant's annual deferred
     compensation contribution under the Deferred Compensation Plan and
     approximately 50% of our matching contribution is in the form of options
     under our 2000 Incentive Stock Option Plan.

  Aggregated Option Exercises In Last Fiscal Year And Fiscal Year-End Option
                                    Values

     The following table sets forth information concerning exercises of stock
options during fiscal year 2001 and the value of unexercised options held by the
Company's Named Executive Officers.

<TABLE>
<CAPTION>
                                                              Number of Securities             Value of Unexercised
                                   Shares        Value     Underlying Unexercised Options     In-the-Money Options at
                                 Acquired on   Realized      at Fiscal Year-End (#)              Fiscal Year-End(2)
     Name                         Exercise(#)    ($)(1)      Exercisable  Unexercisable       Exercisable  Unexercisable
     ----                         -----------    ------      -----------  -------------       -----------  -------------
<S>                               <C>           <C>          <C>          <C>                 <C>          <C>
     Robert M. Stemmler.........    3,572       $ 76,577       299,777      112,973           $4,689,652    $1,775,585
     Dale L. Rasmussen..........       --             --        47,100       35,792              774,570       547,325
     Syed Hussain...............       --             --        44,600       93,400              728,054     1,299,480
     William B. Olson...........       --             --        16,000       44,000              250,840       610,560
     Dennis D. Hartman..........       --             --        20,456       39,975              292,947       548,418
</TABLE>

__________________
(1)  Calculated by determining the difference between the fair market value of
     the Common Stock underlying the options on the date each option was
     exercised and the exercise price of the options.

(2)  Calculated by determining the difference between the fair market value of
     the Common Stock underlying the options on April 30, 2001 and the exercise
     price of the options.

<PAGE>

Compensation of Directors

     Each Director who is not an employee of the Company is paid an attendance
fee of $1,000, plus out-of-pocket expenses, for each board or committee meeting
attended. In addition, the Chairs of the Audit, Compensation and Nominating
Committees are paid an annual fee of $3,000.

     During the 2001 fiscal year, we granted options to purchase 8,000 shares of
Common Stock to each of Messrs. Bryan, Mlotok, Simplot, Ulrich Ruetz and Douglas
Toms and options to purchase 20,000 shares of Common Stock to J. David Power,
each at a price of $12.80 per share. Option exercise prices are the higher of
(i) the average market value of the stock for the 15 trading days following the
date of grant and (ii) the market value on the fifteenth trading day following
the date of grant. Options are not assignable and vest cumulatively at the rate
of 25% annually, beginning on the first anniversary date of grant. However, if a
Director dies, becomes disabled or retires at age 62 or later, then options vest
at the rate of 25% for each full calendar year in which the optionee served as
one of our Directors. Options must be exercised while serving as a Director or
within three months following termination as Director, unless termination
results from death or disability, in which case options may be exercised during
the one-year period following termination. In no event may options be exercised
more than ten years after the date of grant.

Employment Agreements

     The Company entered into an Employment Agreement with Mr. Stemmler for a
term of three consecutive 12-month periods commencing on April 1, 1999. It
requires payment of an annual base salary of $300,000 during the first 12
months, $330,000 during the second 12 months and $360,000 during the third 12
months, and payment of incentive compensation under the Company's Bonus
Incentive Plan unless the Board of Directors approves another cash bonus plan
which supersedes the Bonus Incentive Plan. It also provides for certain
benefits, including term life insurance of $750,000, disability insurance and a
car allowance. The Employment Agreement is subject to termination events, which
include Mr. Stemmler's resignation and the Company's right to terminate him. If
terminated without cause, Mr. Stemmler is entitled to cash payments and benefits
that he would have otherwise been entitled to during the 18 months following
termination, and if termination is without cause following a change in ownership
of the Company, Mr. Stemmler is entitled to such cash payments and benefits for
24 months following termination.

Compensation Committee Interlocks and Insider Participation

     During fiscal year 2001, the Compensation Committee consisted, at various
times, of Ulrich Ruetz, a resigned Director, and Mr. Simplot and Mr. Power. None
of these persons is or has been an officer or employee of the Company or any of
its subsidiaries. In addition, there are no Compensation Committee interlocks
between the Company and other entities involving the Company's executive
officers and Directors who serve as executive officers of such entities.

COMPENSATION COMMITTEE REPORT ON EXECUTIVE COMPENSATION

     The following report on executive compensation is furnished by the Board of
Directors. In fiscal year 2001, as in prior years, the nonmanagement members of
the Board of Directors determined the compensation to be paid to the Company's
executive officers.

Fiscal Year 2001 Compensation

  Compensation Philosophy

     Compensation of the executive officers is designed to link compensation
directly to the Company's growth and financial performance. Compensation
consists of base compensation, a Bonus Incentive Plan and options under the
Incentive Stock Option Plans. The objective of these three elements, taken
together, is to provide reasonable base compensation and to retain, recognize
and reward superior performance. The compensation philosophy also ensures that
the Company provides a comprehensive compensation package that is competitive in
the marketplace.
<PAGE>

     Bonus Incentive Plan

          Officers (and other employees) participate in a Bonus Incentive Plan.
Each officer is eligible to receive a discretionary bonus based upon
individually established performance goals. Officers (and other employees) are
also eligible to receive stock option grants, which are intended to promote
success by aligning employee financial interests with long-term shareholder
value. Stock option grants are based on various subjective factors primarily
relating to the responsibilities of the individual officers, and also to their
expected future contributions and prior option grants.

     Deferred Compensation Plan

          The Board of Directors has adopted a Deferred Compensation Plan to
provide a select group of highly compensated management employees and Directors
with the opportunity to participate in a deferred compensation program. Under
the Plan, participants may defer up to 100% of their base compensation and
bonuses. The Company is required to make certain matching contributions, a
portion of which is options to purchase the Company's Common Stock granted under
the Incentive Stock Option Plans and another portion is shares of the Company's
Common Stock, subject to vesting provisions. The options are granted on the
first day of each calendar year and the exercise price is the closing price on
the Nasdaq National Market on the first trading day of the calendar year. The
Plan is not qualified under Section 401 of the Internal Revenue Code. The
Company will pay participants upon retirement or termination of employment an
amount equal to the amount of the deferred compensation plus investment returns
and vested shares of the Company's Common Stock.

     CEO Compensation

          Robert M. Stemmler has served as Chief Executive Officer pursuant to a
three year Employment Agreement which commenced April 1, 1999. Pursuant to that
Employment Agreement, he was paid a base salary at an annual rate of $330,000 in
fiscal year 2001. In addition to the base salary, Mr. Stemmler was eligible for
an annual cash bonus under the Bonus Incentive Plan. Mr. Stemmler's bonus for
fiscal year 2001 was $101,000.

     Other Executive Officers

          In reviewing and approving base salaries for the executive officers,
the Compensation Committee relies on independent industry surveys to assess the
Company's salary competitiveness and salary range for each position. Base salary
is based upon individual performance, experience, competitive pay practices and
level of responsibilities. Base salaries in fiscal year 2001 reflected the
Committee's determination of compensation levels required to remain competitive,
given each executive officer's performance, the Company's performance and the
competitive environment for executive talent.

          The foregoing report was made by the members of the Compensation
Committee as of March 18, 2001.

                                           Don J. Simplot, Chair
                                           J. David Power III
<PAGE>

                         COMPARATIVE STOCK PERFORMANCE

     The graph below compares the cumulative total stockholder return on the
Company's Common Stock for the last five fiscal years with the cumulative total
return of the CRSP Total Return Index for The Nasdaq Stock Market Index and the
Nasdaq Trucking and Transportation Stock Index over the same period (assuming
the investment of $100 and reinvestment of all dividends).


                                    [GRAPH]

                               Value at April 30
                               -----------------

<TABLE>
<CAPTION>
                                                                       Nasdaq
            Value at                                                   Trucking
            April 30           IMPCO                Nasdaq          Transportation
            --------           -----                ------          --------------
<S>                            <C>                  <C>             <C>
               1996            100.0                100.0                100.0
               1997             92.5                105.8                 98.0
               1998            149.3                158.2                144.4
               1999            101.5                217.0                149.1
               2000            241.8                328.8                120.0
               2001            285.4                179.7                107.6
</TABLE>


     The foregoing report of the Compensation Committee of the Board of
Directors on executive compensation and the performance graph that appears above
shall not be deemed to be soliciting material or to be filed under the
Securities Act of 1933 or the Securities Exchange Act of 1934, or incorporated
by reference in any document so filed.




<PAGE>

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     The following table sets forth information with respect to the beneficial
ownership of our outstanding Common Stock as of July 31, 2001 by:

     .    each person who is the beneficial owner of more than 5% of the
          Company's capital stock;

     .    each of the Company's Directors;

     .    the Company's chief executive officer and the Company's four other
          most highly compensated executive officers whose annual compensation
          exceeded $100,000 for the last fiscal year (the "Named Executive
          Officers"); and

     .    all of the Company's executive officers and Directors as a group.

            Except as otherwise indicated, all of the shares indicated in the
table are shares of Common Stock and each beneficial owner has sole voting and
investment power with respect to the shares set forth opposite its name. This
percentage ownership included in the following is based on 10,442,347 shares of
Common Stock outstanding as of July 31, 2001.

<TABLE>
<CAPTION>
                                                                                              Shares Beneficially Owned
                                                                                              -------------------------

     Name of Beneficial Owner                                                                  Number            Percent
     -----------------------                                                                   -----             -------
<S>                                                                                            <C>               <C>
     5% Stockholders:
     Kern Capital Management, LLC..................................................            832,800  (1)          8.0%
     BERU Aktiengesellschaft.......................................................          1,130,614  (2)         10.8

     Directors and Executive Officers:
     Norman L. Bryan...............................................................             31,000  (3)          *
     Donald L. Dominic.............................................................             34,039  (4)          *
     Dennis D. Hartman.............................................................             35,856  (5)          *
     Syed Hussain..................................................................            182,458  (6)          1.7
     Paul Mlotok...................................................................             20,000  (7)          *
     William B. Olson..............................................................             25,600  (8)          *
     J. David Power III............................................................                      0           *
     Dale L. Rasmussen.............................................................            203,191  (9)          1.9
     Don J. Simplot................................................................            325,933 (10)          3.1
     Robert M. Stemmler............................................................            461,007 (11)          4.3
     All executive officers and Directors as a group (10 persons)..................          1,319,084 (12)         11.9%
</TABLE>

___________________

     * Less than 1% of the outstanding Common Stock.

(1)  Based on a Schedule 13G filed by Kern Capital Management on February 9,
     2001. Robert E. Kern Jr. and David G. Kern are principals and controlling
     members of Kern Capital Management, and as such share voting and
     dispositive power with respect to the shares held by Kern Capital
     Management. The address of Kern Capital Management LLC is 114 West 47th
     Street, Suite 1926, New York, New York 10036.

(2)  Based on a Schedule 13D filed by BERU on May 29, 2001. The address of BERU
     Aktiengesellschaft is Moerikestrasce 155, Ludwigsburg, Germany.

(3)  Includes 30,000 shares issuable upon exercise of outstanding options that
     are exercisable within 60 days after July 31, 2001.

(4)  Represents shares issuable upon exercise of outstanding options that are
     exercisable within 60 days after July 31, 2001.

(5)  Includes 10,400 shares issuable upon exercise of outstanding options that
     are exercisable within 60 days after July 31, 2001.
<PAGE>

(6)    Includes 68,600 shares issuable upon exercise of outstanding options that
       are exercisable within 60 days after July 31, 2001.

(7)    Represents shares issuable upon exercise of outstanding options that are
       exercisable within 60 days after July 31, 2001.

(8)    Represents shares subject to options issuable upon exercise of
       outstanding options that are exercisable within 60 days after July 31,
       2001.

(9)    Includes 59,600 shares issuable upon exercise of outstanding options that
       are exercisable within 60 days after July 31, 2001.

(10)   Includes 30,000 shares issuable upon exercise of outstanding options that
       are exercisable within 60 days after July 31, 2001.

(11)   Includes 339,777 shares issuable upon exercise of outstanding options
       that are exercisable within 60 days after July 31, 2001.

(12)   Includes an aggregate of 618,016 shares issuable upon exercise of
       outstanding options that are exercisable within 60 days after July 31,
       2001.


ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

Options Granted by Certain Stockholders

     On June 5, 1998, Questor Partners Fund, L.P. and its affiliate, Questor
Side-by-Side Partners, L.P. (together, "Questor"), purchased shares of the
Company's Common Stock and 1993 Series 1 Preferred Stock from the estate and
family of a deceased stockholder and on the same day granted separate options
(the "Questor Option") to certain officers of the Company to purchase shares of
the Company's Common Stock as follows:

          Robert M. Stemmler................................ 113,858
          Syed Hussain...................................... 113,858
          Dale L. Rasmussen.................................  56,928

     Each of the Questor Options had an exercise price of $13.75 per share. The
options vested at the rate of 25% annually commencing June 30, 1999. The options
would become exercisable upon the earlier of (i) June 5, 2003 or (ii) the sale
by Questor of 50% or more of the shares of Common Stock owned by it as of June
5, 1998 (including 614,250 shares of Common Stock into which the Company's 1993
Series 1 Preferred Stock owned by Questor was then convertible). In February
2001, Questor notified the officers that Questor had sold 50% or more of the
shares of Common Stock that it had owned as of June 5, 1998, and in March 2001
each of the officers exercised the Questor Options as described below.

Loans

          On March 15, 2001, each of Mr. Stemmler (the Company's President and
Chief Executive Officer), Mr. Rasmussen (the Company's Senior Vice President and
Secretary) and Mr. Hussain (the Company's Vice President of Technology and
Quantum division) exercised his respective Questor Options to purchase IMPCO
Common Stock from Questor at $13.75 per share in the following amounts: Mr.
Stemmler, 113,858 shares; Mr. Rasmussen, 56,928 shares; and Mr. Hussain, 113,858
shares. To finance the exercise of the Questor Options, the Company extended
loans to the officers for the full purchase price of an aggregate of $3,913,854
($1,565,547 each to Messrs. Stemmler and Hussain and $782,760 to Mr. Rasmussen).
The loans were secured by (i) a pledge to the Company of a security interest in
and lien upon shares of common stock of the Company (the "Pledged Shares") and
certain vested Company nonqualified stock options issued to each such person
pursuant to various Company stock option plans (the "NQ Options") and (ii) an
agreement not to exercise any vested Company incentive stock options issued to
the Reporting Person pursuant to various Company stock option plans ("ISOPs") or
to grant any third party any interest in such ISOPs. Additionally, Mr. Rasmussen
pledged the
<PAGE>

equity value of his personal residence as collateral to secure his loan and
Messrs. Stemmler and Rasmussen provided collateral to secure Mr. Hussain's loan.
Each loan bore interest at 9% per annum with a one year maturity. Each of these
loans was repaid in full in July 2001.

     The Company loaned Mr. Hussain $58,000 in June 1999 and an additional
$90,000 in December 2000. The loans bore interest at a rate of 5% per annum. The
purpose of this loan was for general personal reasons. Mr. Hussain's loans, plus
accrued interest, was paid in full in July 2001.

     In December 2000, the Company loaned Mr. Rasmussen $100,000 for general
personal reasons. The loan initially bore interest at a rate of 5% per annum
(through June 30, 2001) and currently bears interest at a rate of 9% per annum.
The loan to Mr. Rasmussen matures September 30, 2001. At July 31, 2001, the
outstanding amount of the loan was $103,487.


<PAGE>


                                  SIGNATURES

     Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this Report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                                      IMPCO TECHNOLOGIES, INC.


Dated: August 27, 2001                By: /s/ W. Brian Olson
                                         --------------------------------
                                         W. Brian Olson
                                         Chief Financial Officer and Treasurer
                                         (Principal Financial Officer)