13G Filing: Penbrook Management and Data I/O Corp (DAIO)

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Page 2 of 13 SEC Filing

CUSIP No. 237690102 13G Page 2 of 12 Pages

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1. NAME OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

Penbrook Management, LLC
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2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

(a) |x|
(b) |_|
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3. SEC USE ONLY

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4. CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware
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NUMBER OF 5. SOLE VOTING POWER

SHARES 0
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BENEFICIALLY 6. SHARED VOTING POWER

OWNED BY 0
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EACH 7. SOLE DISPOSITIVE POWER

REPORTING 521,390
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PERSON 8. SHARED DISPOSITIVE POWER

WITH 0
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9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
521,390
(Reporting person disclaims beneficial ownership of shares managed by
Penbrook Management, LLC on behalf of its investment advisory clients.)
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10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

|_|
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11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

6.56%
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12. TYPE OF REPORTING PERSON*

IA
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