HOUGHTON MIFFLIN HARCOURT CO

CUSIP: 44157R109 Class: COM

IRIDIAN ASSET MANAGEMENT LLC/CT's Holding History (CIK: 0001033427)

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

Q4 2021
Shares 71,844 Value ($000) $1,157 Avg Close — Range —
Q1 2021
Shares 275,539 Value ($000) $2,100 Avg Close — Range —
Q4 2020
Shares 382,483 Value ($000) $1,274 Avg Close — Range —