HOUGHTON MIFFLIN HARCOURT CO

CUSIP: 44157R109 Class: COM

NorthRock Partners, LLC's Holding History (CIK: 0001632097)

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

Q3 2021
Shares 20,651 Value ($000) $277 Avg Close — Range —
Q2 2021
Shares 20,695 Value ($000) $228 Avg Close — Range —
Q1 2021
Shares 15,000 Value ($000) $114 Avg Close — Range —