SC 13D: Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities
Published on March 13, 2009
UNITED
STATES
    SECURITIES
AND EXCHANGE COMMISSION
    Washington,
D.C. 20549
    SCHEDULE
13D
    (Rule
13d-101)
    INFORMATION
TO BE INCLUDED IN STATEMENTS FILED PURSUANT
    TO
RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE
13d-2(a)
    Under
the Securities Exchange Act of 1934
    (Amendment
No.  1 )*
    Supertex,
 Inc.
    (Name of
Issuer)
    
Common Stock, no par
value  
    (Title of
Class of Securities)
    868532102 
    (CUSIP
Number)
    J.
Eric Bjornholt
    Vice
President and Chief Financial Officer
    Microchip
Technology Incorporated
    2355
West Chandler Boulevard
    Chandler,
Arizona  85224-6199
    (480)
792-7200
    With a
Copy to:
    J.
Robert Suffoletta
    Wilson
Sonsini Goodrich & Rosati
    650
Page Mill Rd.
    Palo
Alto, CA 94304
    (650)
493-9300
    (Name,
Address and Telephone Number of Person Authorized to
    Receive
Notices and Communications)
    March 11,
2009 
    (Date of
Event Which Requires Filing of this Statement)
    If the
filing person has previously filed a statement on Schedule 13G to report the
acquisition that is the subject of this Schedule 13D, and is filing this
schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box. o
    Note: Schedules filed in paper
format shall include a signed original and five copies of the schedule,
including all exhibits.  See §240.13d-7 for other parties to whom
copies are to be sent.
    *  The
remainder of this cover page shall be filled out for a Reporting Person’s
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.
    The
information required on the remainder of this cover page shall not be deemed to
be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934
(“Act”) or otherwise subject to the liabilities of that section of the Act but
shall be subject to all other provisions of the Act (however, see the
Notes).
    |  CUSIP No:
      868532102 | Schedule
      13D | Page 2
      of 6 Pages | 
| 1. | NAMES
      OF REPORTING PERSONS Microchip
      Technology Incorporated | |||
| 2. | CHECK
      THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See
      Instructions) | (a)o (b)o | ||
| 3. | SEC
      USE ONLY | |||
| 4. | SOURCE
      OF FUNDS (See Instructions) WC | |||
| 5. | CHECK
      IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
      TO ITEMS 2(D) OR 2(E) | o | ||
| 6. | CITIZENSHIP
      OR PLACE OF ORGANIZATION Delaware | |||
|  
      NUMBER OF SHARES BENEFICIALLY OWNED
      BY EACH REPORTING PERSON
      WITH | 7. | SOLE
      VOTING POWER 786,200 | ||
| 8. | SHARED
      VOTING POWER 0 | |||
| 9. | SOLE
      DISPOSITIVE POWER 786,200 | |||
| 10. | SHARED
      DISPOSITIVE POWER 0 | |||
| 11. | AGGREGATE
      AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 786,200 | |||
| 12. | CHECK
      IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
      SHARES (See Instructions) | o | ||
| 13. | PERCENT
      OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 6.1% | |||
| 14. | TYPE
      OF REPORTING PERSON (See Instructions) CO | |||
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        |  CUSIP No:
      868532102 | Schedule
      13D | Page 3
      of 6 Pages | 
| Item
      1. | Security
      and Issuer | 
This
Amendment No. 1 to Statement on Schedule 13D (this “Schedule 13D”)
relates to the common stock, no par value (the “Common Stock”), of
Supertex, Inc., a California corporation (the “Issuer”), having its
principal executive offices at 1235 Bordeaux Drive, Sunnyvale, California
94086.
    | Item
      2. | Identity
      and Background | 
This
Amendment No. 1 to Schedule 13D is being filed by Microchip Technology
Incorporated, a Delaware corporation (“Microchip” or the
“Reporting
Person”).  The address of the principal business office of
Microchip is 2355 West Chandler Boulevard, Chandler,
Arizona  85224-6199.
    The
principal business of Microchip is the development and manufacturing of
specialized semiconductor products used by its customers for a wide variety of
embedded control applications.
    The name,
present principal occupation or employment, present business address and country
of citizenship of each director and executive officer of Microchip is set forth
on Schedule I
attached hereto.
    During
the past five years, neither Microchip nor, to the best of Microchip’s
knowledge, any director or executive officer of Microchip, has been (i)
convicted of a criminal proceeding (excluding traffic violations or similar
misdemeanors) or (ii) a party to a civil proceeding of a judicial or
administrative body of competent jurisdiction and as a result of such proceeding
was or is subject to a judgment, decree or final order enjoining future
violations of, or prohibiting or mandating activities subject to, federal or
state securities laws or finding any violation with respect to such
laws.
    | Item
      3. | Source
      and Amount of Funds or Other
Consideration | 
An
aggregate of 594,300 shares of Common Stock reported in this Schedule 13D as
being beneficially owned by Microchip were acquired in open market
purchases.  The remaining aggregate of 191,900 shares were acquired
pursuant to the exercise of put options sold by Microchip.  The
aggregate purchase price for the shares of Common Stock purchased by Microchip
in open market purchases and pursuant to the exercise of put options was $16.9
million.  The source of funding for the purchases of such shares was
the general working capital of Microchip.
    | Item
      4. | Purpose
      of Transaction | 
Microchip
acquired certain of the shares in open market transactions prior to May 13,
2008.  Microchip acquired additional shares in accordance with certain put
option transactions Microchip had previously entered into.  Microchip has
no current intention to acquire additional shares of the Issuer's common stock
except as described herein or pursuant to the exercise of similar option-related
transactions Microchip also previously entered into (see Item 6 below), although
Microchip may do so depending on market conditions and other factors that it
deems appropriate in its sole discretion.  Microchip may also acquire
or sell additional shares of the Issuer's common stock as it deems
appropriate, whether in open market purchases, privately negotiated transactions
or otherwise.  Microchip and/or its advisors may enter into or engage in
discussions with the Issuer concerning an event referred to in paragraphs (a)
through (j), inclusive, of Item 4 of Schedule 13D.  Microchip and/or its
advisors may also engage in discussions with other market participants and/or
other stockholders of the Issuer concerning the issuer, as Microchip deems
advisable or appropriate.  Microchip also reserves the right to dispose of
some or all of the shares of Common Stock at any time in the open market, in
privately negotiated transactions to third parties or otherwise as it deems
appropriate in its sole discretion.Any of the foregoing actions could lead to
one or more of the events referred to in paragraphs (a) through (j), inclusive,
of Item 4 of Schedule 13D, including, potentially, one or more mergers,
consolidations, sales or acquisitions of assets, change in control, issuances,
purchases, dispositions or pledges of securities or other changes in
capitalization.   
    | Item
      5. | Interest
      in Securities of the
Issuer | 
(a),
(b)  According to the Issuer’s Quarterly Report on Form 10-Q for the
Quarter Ended December 27, 2008, filed with the Securities Exchange Commission
on February 4, 2009, there were 12,869,095 shares of Common Stock issued
and outstanding as of January 30, 2009.  Based on such information and
including the transactions described in Item 5(c) below, Microchip reports
beneficial ownership of 786,200 shares of Common Stock, which represents 6.1% of
the total number of issued and outstanding shares of Common
Stock.  Voting and dispositive power with respect to such shares of
Common Stock is held solely by Microchip. 
    3
        |  CUSIP No:
      868532102 | Schedule
      13D | Page 4
      of  6 Pages | 
(c)  During
the last sixty (60) days, Microchip did not purchase any shares of Common Stock
in the open market.  During the last sixty (60) days, Microchip
purchased the following shares of Common Stock pursuant to the exercise of put
options previously sold by Microchip:
    | Trade
      Date | Shares | Price
      / Share | 
| January
      20, 2009 | 40,000 | $22.50 | 
| March
      4, 2009 | 4,400 | $25.00 | 
| March
      10, 2009 | 6,900 | $25.00 | 
| March
      11, 2009 | 37,500 | $25.00 | 
Other
than the transactions and agreements disclosed above, neither Microchip nor, to
the best of Microchip’s knowledge, any director or executive officer of
Microchip, has engaged in any transactions in shares of Common Stock in the last
sixty (60) days.
    (d),
(e)  Not applicable.
    | Item
      6. | Contracts,
      Arrangements, Understandings or Relationships with Respect to Securities
      of the Issuer | 
Microchip
has written and sold the following put options that provide the other party with
the option to sell the indicated numbers of shares of Common Stock of the Issuer
to Microchip at the specified exercise prices at any time prior to the specified
expiration dates:
    | Trade
      Date | Shares | Price | Expiration
      Date | 
| Various | 401,200 | $25.00 | March
      20, 2009 | 
| Various | 30,000 | $22.50 | January
      20, 2010 | 
| Various | 350,000 | $25.00 | January
      20, 2010 | 
Other
than as described above, there are no other contracts, arrangements,
understandings or relationships (legal or otherwise) between Microchip or, to
the best of Microchip’s knowledge, any director or executive officer of
Microchip, and any person with respect to any securities of the Issuer,
including but not limited to, transfer or voting of any of the securities of the
Issuer, finder’s fees, joint ventures, loan or option arrangements, puts or
calls, guarantees of profits, division of profits or loss, or the giving or
withholding of proxies.
    | Item
      7. | Material
      to Be Filed as Exhibits | 
    None
    4
        |  CUSIP No:
      868532102 | Schedule
      13D | Page 5
      of  6 Pages | 
Signature
    After
reasonable inquiry and to the best of my knowledge and belief, I certify that
the information set forth in this statement is true, complete and
correct.
    | Dated:
      March 13, 2009 | MICROCHIP
      TECHNOLOGY INCORPORATED | 
| By:  /s/ J. Eric
      Bjornholt                                                  | |
| J.
      Eric Bjornholt Vice
      President, Chief Financial Officer (Principal
      Accounting and Financial
Officer) | 
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        |  CUSIP No:
      868532102 | Schedule
      13D | Page 6
      of 6 Pages | 
SCHEDULE
I
    MICROCHIP
TECHNOLOGY INCORPORATED
    DIRECTORS
AND EXECUTIVE OFFICERS
    | Name | Present Principal
      Occupation | Present Business
      Address | Country
      of Citizenship | |||
| Steve
      Sanghi | President,
      Chief Executive Officer and Chairman of the Board of Microchip Technology
      Incorporated | Microchip
      Technology Incorporated 2355
      West Chandler Boulevard Chandler,
      Arizona  85224-6199 | United
      States | |||
| Matthew
      W. Chapman | Director
      of Microchip Technology Incorporated President
      and Chief Executive Officer of Northwest Evaluation
      Association | Northwest
      Evaluation Association 5885
      S.W. Meadow Rd, #200 Lake
      Oswego, OR 97035 | United
      States | |||
| L.B.
      Day | Director
      of Microchip Technology Incorporated President
      of L.B. Day & Company, Inc. | L.B.
      Day & Co. 806
      S.W. Broadway, 11th
      Flr. Portland,
      OR 97205-3313 | United
      States | |||
| Albert
      J. Hugo-Martinez | Director
      of Microchip Technology Incorporated Chief
      Executive Officer of Hugo-Martinez Associates | Hugo-Martinez
      and Associates 1366
      Via Alta Del
      Mar, CA 92014 | United
      States | |||
| Wade
      F. Meyercord | Director
      of Microchip Technology Incorporated President
      of Meyercord & Associates, Inc. | Meyercord
      & Associates, Inc. 16187
      Greenwood Lane Los
      Gatos, CA 95030 | United
      States | |||
| J.
      Eric Bjornholt | Vice
      President, Chief Financial Officer of Microchip Technology
      Incorporated | Microchip
      Technology Incorporated 2355
      West Chandler Boulevard Chandler,
      Arizona  85224-6199 | United
      States | |||
| Stephen
      V. Drehobl | Vice
      President, Security, Microcontroller and Technology Division of Microchip
      Technology Incorporated | Microchip
      Technology Incorporated 2355
      West Chandler Boulevard Chandler,
      Arizona  85224-6199 | United
      States | |||
| David
      S. Lambert | Vice
      President, Fab Operations of Microchip Technology
    Incorporated | Microchip
      Technology Incorporated 2355
      West Chandler Boulevard Chandler,
      Arizona  85224-6199 | United
      States | |||
| Mitchell
      R. Little | Vice
      President, Worldwide Sales and Applications of Microchip Technology
      Incorporated | Microchip
      Technology Incorporated 2355
      West Chandler Boulevard Chandler,
      Arizona  85224-6199 | United
      States | |||
| Ganesh
      Moorthy | Executive
      Vice President of Microchip Technology Incorporated | Microchip
      Technology Incorporated 2355
      West Chandler Boulevard Chandler,
      Arizona  85224-6199 | United
      States | |||
| Richard
      J. Simoncic | Vice
      President, Analog and Interface Products Division of Microchip Technology
      Incorporated | Microchip
      Technology Incorporated 2355
      West Chandler Boulevard Chandler,
      Arizona  85224-6199 | United
      States | 
6