Filing Details

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) Data I/O Corp. ------------------------------------------------------------------------- (Name of Issuer) Common Stock ------------------------------------------------------------------------- (Title of Class of Securities) 237690102 ------------------------------------------------------------------------- (CUSIP Number) December 31, 2017 ------------------------------------------------------------------------- (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: |_| Rule 13d-1(b) |x| Rule 13d-1(c) |_| Rule 13d-1(d) (1) 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 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. 237690102 13G Page 2 of 12 Pages ------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Penbrook Management, LLC ------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |x| (b) |_| ------------------------------------------------------------------------- 3. SEC USE ONLY ------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES 0 ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING 486,340 ---------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 0 ------------------------------------------------------------------------ 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 486,340 (Reporting person disclaims beneficial ownership of shares managed by Penbrook Management, LLC on behalf of its investment advisory clients.) ------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| ------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.90% ------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IA ------------------------------------------------------------------------- CUSIP No. 237690102 13G Page 3 of 12 Pages ------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) AnKap Partners, L.P. ------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |x| (b) |_| ------------------------------------------------------------------------- 3. SEC USE ONLY ------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES 110,000 ---------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 ---------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING 110,000 ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 0 ------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 110,000 ------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| ------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.33% ------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* PN ------------------------------------------------------------------------- CUSIP No. 237690102 13G Page 4 of 12 Pages ------------------------------------------------------------------------ 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) AnKap LLC ------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |x| (b) |_| ------------------------------------------------------------------------- 3. SEC USE ONLY ------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES 110,000 ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING 110,000 ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 0 ------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 110,000 (Reporting person disclaims beneficial ownership of shares held by AnKap Partners, L.P. which represent the interests of partners of AnKap Partners, L.P.) ------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| ------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.33% ------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IA ------------------------------------------------------------------------ CUSIP No. 237690102 13G Page 5 of 12 Pages ------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Robert S. Anderson ------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |x| (b) |_| ------------------------------------------------------------------------- 3. SEC USE ONLY ------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION US Citizen ------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES 43,800 ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 110,000 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING 43,800 ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 442,540 ------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 486,340 (Reporting person disclaims beneficial ownership of shares managed by Penbrook Management, LLC on behalf of its investment advisory clients and disclaims beneficial ownership of shares held by AnKap Partners, L.P. which represent the interest of the other partners of AnKap Partners, L.P.) ------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| ------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.90% ------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IN ------------------------------------------------------------------------ CUSIP No. 237690102 13G Page 6 of 12 Pages ------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Ralph Kaplan ------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |x| (b) |_| ------------------------------------------------------------------------- 3. SEC USE ONLY ------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION US Citizen ------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES 0 ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 110,000 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING 0 ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 442,540 ------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 442,540 (Reporting person disclaims beneficial ownership of shares managed by Penbrook Management, LLC on behalf of its investment Advisory clients and disclaims beneficial ownership of shares held by AnKap Partners, L.P. which represent the interest of the other partners of AnKap Partners, L.P.) ------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| ------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.37% ------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IN ----- ----------------------------------------------------------- CUSIP No. 237690102 13G Page 7 of 12 Pages ------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Barbara Burke DiCostanzo ------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |x| (b) |_| ------------------------------------------------------------------------- 3. SEC USE ONLY ------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION US Citizen ------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES 0 ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 110,000 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING 0 ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 442,540 ------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 442,540 (Reporting person disclaims beneficial ownership of shares managed by Penbrook Management, LLC on behalf of its investment Advisory clients and disclaims beneficial ownership of shares held by AnKap Partners, L.P. which represent the interest of the other partners of AnKap Partners, L.P.) ------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| ------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.37% ------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IN ------------------------------------------------------------------------ CUSIP No. 237690102 13G Page 8 of 12 Pages Item 1(a). Name of Issuer: Data I/O Corp. Item 1(b). Address of Issuer's Principal Executive Offices: 6464 185th Avenue NE, Suite 101, Redmond, WA 98052 Item 2(a). Name of Person Filing: This Statement on Schedule 13G is filed by Penbrook Management, LLC., AnKap Partners, L.P., AnKap LLC., Robert S. Anderson, Ralph Kaplan, Barbara Burke DiCostanzo. Item 2(b). Address of Principal Business Office, or if None, Residence: 880 Third Avenue, 16th Floor, New York, NY 10022. Item 2(c). Citizenship: See pages 2,3,4,5,6 7 Item 2(d). Title of Class of Securities: Common Stock, $0.01 par value per share Item 2(e). CUSIP Number: 237690102 Item 3. If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a: (a) |_| Broker or dealer registered under Section 15 of the Exchange Act. (b) |_| Bank as defined in Section 3(a)(6) of the Exchange Act. (c) |_| Insurance company as defined in Section 3(a)(19) of the Exchange Act. (d) |_| Investment company registered under Section 8 of the Investment Company Act. (e) |_| An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E); (f) |_| An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F); (g) |_| A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G); (h) |_| A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act; (i) |_| A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act; (j) |_| Group, in accordance with Rule 13d-1(b)(1)(ii)(J). CUSIP No. 237690102 13G Page 9 of 12 Pages Item 4. Ownership. Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. (a) Amount beneficially owned: See pages 2,3,4,5,6,7 (b) Percent of class: See pages 2,3,4,5,6,7 (c) Number of shares as to which such person has: (i) Sole power to vote or to direct the vote: See pages 2,3,4,5,6,7 (ii) Shared power to vote or to direct the vote: See pages 2,3,4,5,6,7 (iii) Sole power to dispose or to direct the disposition of: See pages 2,3,4,5,6,7 (iv) Shared power to dispose or to direct the disposition of: See pages 2,3,4,5,6,7 Item 5. Ownership of Five Percent or Less of a Class. If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities check the following [ ]. Not applicable Item 6. Ownership of More Than Five Percent on Behalf of Another Person. Not Applicable Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person. Not Applicable Item 8. Identification and Classification of Members of the Group. See attached Exhibit A and pages 2,3,4,5,6,7. Item 9. Notice of Dissolution of Group. Not Applicable CUSIP No. 237690102 13G Page 10 of 12 Pages Item 10. Certifications. (a) The following certification shall be included if the statement is filed pursuant to Rule 13d-1(b): "By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having such purpose or effect." (b) The following certification shall be included if the statement is filed pursuant to Rule 13d-1(c): "By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having such purpose or effect." CUSIP No. 237690102 13G Page 11 of 12 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. Date: February 21, 2018 By: Penbrook Management, LLC By: /s/ Barbara Burke DiCostanzo _______________________________________ Barbara Burke DiCostanzo, Managing Member Penbrook Management, LLC By: AnKap Partners, L.P. By: /s/Robert S. Anderson ___________________________________ Robert S. Anderson, Managing Member of the General Partner By: AnKap, LLC By: /s/Robert S. Anderson ___________________________________ Robert S. Anderson, Managing Member AnKap, LLC By: /s/Robert S. Anderson ___________________ Robert S. Anderson By: /s/Ralph Kaplan _________________ Ralph Kaplan By: /s/Barbara Burke DiCostanzo ________________________ Barbara Burke DiCostanzo CUSIP No. 237690102 13G Page 12 of 12 Pages Exhibit A Joint Filing Agreement Penbrook Management, LLC, AnKap Partners,L.P. AnKap LLC, Robert S. Anderson,Ralph Kaplan, Barbara Burke DiCostanzo each hereby agrees that the Schedule 13G to which this Exhibit is attached and any amendments thereto relating to the acquisition of shares of common Stock of Data I/O Corp. is filed jointly on behalf of each such person. Dated: February 21, 2018 Penbrook Management, LLC /s/ Barbara Burke DiCostanzo __________________________________________ Barbara Burke DiCostanzo, Managing Member Penbrook Management, LLC AnKap Partners, L.P. /s/Robert S. Anderson ___________________________________ Robert S. Anderson, Managing Member of the General Partner AnKap, LLC /s/Robert S. Anderson ___________________________________ Robert S. Anderson, Managing Member AnKap, LLC /s/Robert S. Anderson ______________________ Robert S. Anderson /s/Ralph Kaplan ______________________ Ralph Kaplan /s/Barbara Burke DiCostanzo ___________________________ Barbara Burke DiCostanzo