ALLETE INC

CUSIP: 018522300 Class: Common Stock

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

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

Q1 2019
Shares 219,317 Value ($000) $18,034 Avg Close — Range —
Q4 2018
Shares 228,373 Value ($000) $17,407 Avg Close — Range —
Q3 2018
Shares 224,969 Value ($000) $16,875 Avg Close — Range —
Q2 2018
Shares 187,722 Value ($000) $14,532 Avg Close — Range —
Q1 2016
Shares 293,918 Value ($000) $16,480 Avg Close — Range —
Q4 2015
Shares 315,459 Value ($000) $16,035 Avg Close — Range —
Q3 2015
Shares 405,870 Value ($000) $20,492 Avg Close — Range —