SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

America First Investment Advisors, LLC's Holding History (CIK: 0001308778)

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

Q3 2015
Shares 59,227 Value ($000) $8,228 Avg Close — Range —
Q2 2015
Shares 77,405 Value ($000) $10,786 Avg Close — Range —
Q1 2015
Shares 80,058 Value ($000) $11,068 Avg Close — Range —
Q4 2014
Shares 87,780 Value ($000) $12,050 Avg Close — Range —
Q3 2014
Shares 94,798 Value ($000) $12,893 Avg Close — Range —
Q2 2014
Shares 95,666 Value ($000) $9,708 Avg Close — Range —
Q1 2014
Shares 95,098 Value ($000) $8,880 Avg Close — Range —
Q4 2013
Shares 95,329 Value ($000) $8,962 Avg Close — Range —
Q3 2013
Shares 96,235 Value ($000) $8,209 Avg Close — Range —
Q2 2013
Shares 94,044 Value ($000) $7,563 Avg Close — Range —