HOUGHTON MIFFLIN HARCOURT CO

CUSIP: 44157R109 Class: COM

Aperio Group, LLC's Holding History (CIK: 0001364615)

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

Q4 2020
Shares 20,092 Value ($000) $67 Avg Close — Range —
Q2 2020
Shares 12,866 Value ($000) $23 Avg Close — Range —
Q1 2020
Shares 11,791 Value ($000) $22 Avg Close — Range —
Q3 2019
Shares 12,234 Value ($000) $65 Avg Close — Range —
Q2 2019
Shares 7,105 Value ($000) $41 Avg Close — Range —
Q4 2018
Shares 18,317 Value ($000) $162 Avg Close — Range —
Q3 2018
Shares 20,876 Value ($000) $146 Avg Close — Range —
Q2 2018
Shares 19,574 Value ($000) $150 Avg Close — Range —
Q1 2018
Shares 14,951 Value ($000) $104 Avg Close — Range —
Q4 2017
Shares 15,801 Value ($000) $147 Avg Close — Range —
Q3 2017
Shares 14,580 Value ($000) $176 Avg Close — Range —
Q2 2017
Shares 16,407 Value ($000) $202 Avg Close — Range —
Q1 2017
Shares 16,627 Value ($000) $169 Avg Close — Range —