DATA I O CORP

Ticker: DAIO CUSIP: 237690102 Class: Stock

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

Note: Option positions (PUT/CALL) are excluded.

Q4 2015

Shares 170,000 Value ($000) $428 Avg Close $2.73 Range $2.34 - $3.20

Q3 2015

Shares 299,530 Value ($000) $698 Avg Close $2.85 Range $2.26 - $3.62

Q2 2015

Shares 264,500 Value ($000) $905 Avg Close $3.39 Range $2.85 - $3.80

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	170,000	$428	$2.73	$2.34 - $3.20
Q3 2015	299,530	$698	$2.85	$2.26 - $3.62
Q2 2015	264,500	$905	$3.39	$2.85 - $3.80