USEC INC

CUSIP: 90333E207 Class: COMMON

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

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

Q1 2014
Shares 69,326 Value ($000) $279 Avg Close — Range —
Q4 2013
Shares 246,933 Value ($000) $1,635 Avg Close — Range —
Q3 2013
Shares 301,315 Value ($000) $3,170 Avg Close — Range —