TENARIS S A

Ticker: TS CUSIP: 88031M109 Class: ADR

Mirae Asset Global Investments Co., Ltd.'s Holding History (CIK: 0001569395)

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

Q1 2010
Shares 801,280 Value ($000) $34,407 Avg Close — Range —
Q4 2009
Shares 5,400 Value ($000) $230 Avg Close — Range —
Q3 2009
Shares 6,847 Value ($000) $244 Avg Close — Range —