HOUGHTON MIFFLIN HARCOURT CO

CUSIP: 44157R109 Class: COM

Walleye Trading LLC's Holding History (CIK: 0001388391)

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

Q4 2021
Shares 21,008 Value ($000) $338 Avg Close — Range —
Q3 2021
Shares 10,899 Value ($000) $146 Avg Close — Range —
Q2 2020
Shares 70,000 Value ($000) $127 Avg Close — Range —
Q3 2018
Shares 51,389 Value ($000) $360 Avg Close — Range —
Q1 2017
Shares 36,000 Value ($000) $365 Avg Close — Range —
Q1 2016
Shares 103 Value ($000) $2 Avg Close — Range —
Q3 2015
Shares 300 Value ($000) $6 Avg Close — Range —
Q2 2015
Shares 3,100 Value ($000) $78 Avg Close — Range —