AIR METHODS CORP

CUSIP: 009128307 Class: COM PAR $.06

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q1 2017
Shares 472,523 Value ($000) $20,318 Avg Close — Range —
Q4 2016
Shares 488,696 Value ($000) $15,565 Avg Close — Range —
Q3 2016
Shares 613,495 Value ($000) $19,318 Avg Close — Range —
Q2 2016
Shares 602,567 Value ($000) $21,590 Avg Close — Range —
Q1 2016
Shares 633,266 Value ($000) $22,682 Avg Close — Range —
Q4 2015
Shares 610,702 Value ($000) $25,606 Avg Close — Range —
Q3 2015
Shares 519,016 Value ($000) $17,693 Avg Close — Range —
Q2 2015
Shares 473,269 Value ($000) $19,565 Avg Close — Range —
Q1 2015
Shares 513,573 Value ($000) $23,927 Avg Close — Range —
Q4 2014
Shares 496,301 Value ($000) $21,852 Avg Close — Range —
Q3 2014
Shares 498,245 Value ($000) $27,677 Avg Close — Range —
Q2 2014
Shares 484,603 Value ($000) $25,030 Avg Close — Range —
Q1 2014
Shares 563,386 Value ($000) $30,101 Avg Close — Range —
Q4 2013
Shares 574,703 Value ($000) $33,483 Avg Close — Range —
Q3 2013
Shares 596,446 Value ($000) $25,387 Avg Close — Range —
Q2 2013
Shares 609,758 Value ($000) $20,646 Avg Close — Range —