HOUGHTON MIFFLIN HARCOURT CO

CUSIP: 44157R109 Class: COM

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q1 2022
Shares 78,740 Value ($000) $1,654 Avg Close — Range —
Q4 2021
Shares 52,126 Value ($000) $839 Avg Close — Range —
Q3 2021
Shares 47,847 Value ($000) $643 Avg Close — Range —
Q2 2021
Shares 29,316 Value ($000) $324 Avg Close — Range —
Q1 2020
Shares 7,300 Value ($000) $14 Avg Close — Range —
Q4 2019
Shares 3,200 Value ($000) $20 Avg Close — Range —
Q4 2015
Shares 1,477 Value ($000) $32 Avg Close — Range —