DATA I/O CORP — Major Shareholding Notification 1999

Mar 18, 1999

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ------------------------------------ SCHEDULE 13D (AMENDMENT NO.10) Under the Securities Exchange Act of 1934 Data I/O Corporation ------------------------------------ (Name of Issuer) Common Stock, No Par Value ------------------------------------ (Title of Class of Securities) CUSIP Number: 237690102 Glen F. Ceiley Bisco Industries, Inc. 704 W. Southern Ave. Orange, CA 92865 (714) 283-7140 ------------------------------------ (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) March 16, 1999 ------------------------------------ (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 which is subject of this Schedule 13D, and is filing this statement because of Rule 13d-1(b)(3) or (4), check the following box: ( ) Page 1 of 11 Pages Exhibit Index on Page 6. SCHEDULE 13D CUSIP No. 237690102 1. Name of Reporting Person Mr. Glen F. Ceiley 2. Check the Appropriate Box if a Member of a group (a) (X) (b) ( ) 3. SEC Use Only 4. Source of Funds PF 5. Check Box if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e) ( ) 6. Citizenship or Place of Organization U.S.A. Number of 7. Sole Voting Power Shares Beneficially 900 shares of Common Stock Owned By Each 8. Shared Voting Power Reporting Person 1,202,625 shares of Common Stock (See Item 5) With 9. Sole Dispositive Power 900 shares of Common Stock 10. Shared Dispositive Power 1,202,625 shares of Common Stock (See Item 5) 11. Aggregate Amount Beneficially Owned by Each Reporting Person 1,202,625 shares of Common Stock (See Item 5) 12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares ( ) 13. Percent of Class Represented by Amount in Row (11) 16.73% 14. Type of Reporting Person IN Page 2 of 11 Pages SCHEDULE 13D CUSIP No. 237690102 1. Name of Reporting Person Bisco Industries, Inc. 2. Check the Appropriate Box if a Member of a Group (a) (X) (b) ( ) 3. SEC Use Only 4. Source of Funds WC 5. Check Box if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e) ( ) 6. Citizenship or Place of Organization Illinois Number of 7. Sole Voting Power Shares Beneficially 792,400 shares of Common Stock (See Item 5) Owned By Each Reporting 8. Shared Voting Power Person With 0 9. Sole Dispositive Power 792,400 shares of Common Stock (See Item 5) 10. Shared Dispositive Power 0 11. Aggregate Amount Beneficially Owned by Each Reporting Person 792,400 shares of Common Stock (See Item 5) 12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares ( ) 13. Percent of Class Represented by Amount in Row (11) 11.03% 14. Type of Reporting Person CO Page 3 of 11 Pages SCHEDULE 13D CUSIP No. 237690102 1. Name of Reporting Person Bisco Industries, Inc. Profit Sharing and Savings Plan 2. Check the Appropriate Box if a Member of a Group (a) (X) (b) ( ) 3. SEC Use Only 4. Source of Funds 00 5. Check Box if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e) ( ) 6. Citizenship or Place of Organization U.S.A. Number of 7. Sole Voting Power Shares Beneficially 409,325 shares of Common Stock (See Item 5) Owned By Each Reporting 8. Shared Voting Power Person With 0 9. Sole Dispositive Power 409,325 shares of Common Stock (See Item 5) 10. Shared Dispositive Power 0 11. Aggregate Amount Beneficially Owned by Each Reporting Person 409,325 shares of Common Stock (See Item 5). 12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares ( ) 13. Percent of Class Represented by Amount in Row (11) 5.70% 14. Type of Reporting Person EP Page 4 of 11 Pages Item 3. Source and Amount of Funds or Other Consideration ------------------------------------------------- Item 3 to Schedule 13D is amended as follows: Mr. Ceiley purchased directly 900 shares for a total consideration of $2,137.50 from his personal funds. Bisco purchased 792,400 shares for a total consideration of $1,589,435.57. Bisco paid for such Shares from its working capital, including funds made available in the ordinary course of business under its working capital credit facility. The Plan purchased 409,325 shares for a total consideration of $1,131,752.07 using funds held in the Plan for investment purposes. Page 5 of 11 Pages Item 7. Material to be Filed as Exhibits ------------------------------------------ Exhibit 1. Joint Filing Agreement dated as of Page Number March 18, 1999 11 Page 6 of 11 Pages SCHEDULE 1 The Reporting Persons have engaged in the following transactions in Shares since February 9, 1999, the last day on which a transaction in the shares by the reporting persons was reported on the Schedule 13D. All transactions involved purchases of Shares on the NASDAQ.

• Excluding commissions Page 7 of 11 pages SIGNATURE --------- After reasonable inquiry and to the best of its knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct. Dated: March 18, 1999 Glen F. Ceiley -------------------------- Name: Glen F. Ceiley Page 8 of 11 pages SIGNATURE --------- After reasonable inquiry and to the best of its knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct. Dated: March 18, 1999 Bisco Industries, Inc. Glen F. Ceiley --------------------------------- Name: Glen F. Ceiley Title: President Page 9 of 11 pages SIGNATURE --------- After reasonable inquiry and to the best of its knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct. Dated: March 18, 1999 Bisco Industries, Inc. Profit Sharing And Savings Plan Glen F. Ceiley _______ Name: Glen F. Ceiley Title: Trustee Page 10 of 11 Pages