ARCH COAL INC

CUSIP: 039380100 Class: COM

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q1 2015
Shares 385,941 Value ($000) $386 Avg Close — Range —
Q4 2014
Shares 393,441 Value ($000) $700 Avg Close — Range —
Q3 2014
Shares 391,766 Value ($000) $831 Avg Close — Range —
Q2 2014
Shares 387,541 Value ($000) $1,415 Avg Close — Range —
Q1 2014
Shares 385,741 Value ($000) $1,859 Avg Close — Range —
Q4 2013
Shares 384,141 Value ($000) $1,709 Avg Close — Range —
Q3 2013
Shares 381,641 Value ($000) $1,569 Avg Close — Range —
Q2 2013
Shares 369,857 Value ($000) $1,398 Avg Close — Range —
Q1 2013
Shares 369,032 Value ($000) $2,004 Avg Close — Range —