-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, M3Rja8rUMJWqeXEG7l3czoyNH/B3N8jiX4miizOTE8Yy2yZlucomqls7i2vKiSGn 8Kl/8ka+iOl6gWjzM9QlKA== 0000927016-98-001885.txt : 19980511 0000927016-98-001885.hdr.sgml : 19980511 ACCESSION NUMBER: 0000927016-98-001885 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 19980508 SROS: NASD SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: SUPERTEX INC CENTRAL INDEX KEY: 0000730000 STANDARD INDUSTRIAL CLASSIFICATION: SEMICONDUCTORS & RELATED DEVICES [3674] IRS NUMBER: 942328535 STATE OF INCORPORATION: CA FISCAL YEAR END: 0331 FILING VALUES: FORM TYPE: SC 13G SEC ACT: SEC FILE NUMBER: 005-36955 FILM NUMBER: 98613218 BUSINESS ADDRESS: STREET 1: 1225 BORDEAUX DR CITY: SUNNYVALE STATE: CA ZIP: 94088-3607 BUSINESS PHONE: 4087440100 MAIL ADDRESS: STREET 1: 1350 BORDEAUX DR CITY: SUNNYVALE STATE: CA ZIP: 94088-3607 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: ACCOUNT MANAGEMENT CORP /MA/ CENTRAL INDEX KEY: 0000769954 STANDARD INDUSTRIAL CLASSIFICATION: [] IRS NUMBER: 042326575 STATE OF INCORPORATION: MA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 2 NEWBERRY STREET CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 6172364200 MAIL ADDRESS: STREET 1: 2 NEWBERRY STREET CITY: BOSTON STATE: MA ZIP: 02116 SC 13G 1 FORM SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ________)* Supertex, Inc. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock - -------------------------------------------------------------------------------- (Title of Class of Securities) 868532-10-2 - -------------------------------------------------------------------------------- (CUSIP Number) Check the following box if a fee is being paid with this statement [_]. (A fee is not required only if the filing person: (1) has a previous statement on file reporting beneficial ownership of more than five percent of the class of securities described in Item 1; and (2) has filed no amendment subsequent thereto reporting beneficial ownership of five percent or less of such class.) (See Rule 13d-7.) *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 the disclosures provided in a prior cover page. The information required in 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). (Continued on following page(s)) Page 1 of 4 Pages SCHEDULE 13G - ----------------------- --------------------- CUSIP NO. 868532-10-2 PAGE 2 OF 4 PAGES - ----------------------- --------------------- - ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Account Management Corporation 04-2324575 - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [_] (b) [X] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ SOURCE OF FUNDS* 4 - ------------------------------------------------------------------------------ CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED 5 PURSUANT TO ITEMS 2(d) or 2(e) [_] - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 6 Massachusetts - ------------------------------------------------------------------------------ SOLE VOTING POWER 7 NUMBER OF -0- SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 8 -0- OWNED BY ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 9 REPORTING 1,234,200 shares PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 10 -0- - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 11 1,234,200 shares - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* 12 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 13 9.8% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON* 14 Investment Advisor (incl. officers and their families) - ------------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7 (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION. Page 2 of 4 pages Item 1(a) Name of Issuer: Supertex, Inc. ----------------------------------------------------------------- Item 1(b) Address of Issuer's Principal Executive Offices: 1235 Bordeaux Drive, Sunnyvale, CA 94089 ----------------------------------------------------------------- Item 2(a) Name of Person Filing: Account Management Corp. ----------------------------------------------------------------- Item 2(b) Address of Principal Business Office: 2 Newbury Street, Boston, MA 02116 ----------------------------------------------------------------- Item 2(c) Citizenship: Massachusetts ----------------------------------------------------------------- Item 2(d) Title of Class of Securities Common Stock ----------------------------------------------------------------- Item 2(e) CUSIP Number: 868532-10-2 ----------------------------------------------------------------- Item 3. If this statement is filed pursuant to Rules 13d-1(b) or 13d-2(b), check whether the person filing is a: (e) (xx) Investment Adviser registered under section 203 of the Investment Advisers Act of 1940 Item 4. Ownership (a) Amount Beneficially Owned: 1,234,200 shares ----------------------------------------------------------------- (b) Percent of Class: 9.8% ----------------------------------------------------------------- (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: -0- ---- (ii) shared power to vote or to direct the vote: -0- ---- (iii) sole power to dispose or to direct the disposition of 1,234,200 shares ---------------- -------------------------------------------------- (iv) shared power to dispose or to direct the disposition of -0- ---------------- Item 5. Ownership of Five Percent or Less of a Class. Page 3 of 4 Item 6. Ownership of More than Five Percent on Behalf of Another Person. N.A. Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding company. N.A. Item 8. Identification and Classification of Members of the Group. N.A. Item 9. Notice of Dissolution of Group. N.A. Item 10. Certification. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purposes or effect. Signature. After resonable 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. February 6, 1998 ------------------------------------ Date /s/ Peter deRoetth ------------------------------------ Signature Peter deRoetth, President ------------------------------------ Name/Title -----END PRIVACY-ENHANCED MESSAGE-----