HOUGHTON MIFFLIN HARCOURT CO

CUSIP: 44157R109 Class: COM

MARSHALL WACE, LLP's Holding History (CIK: 0001318757)

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

Q1 2022
Shares 130,717 Value ($000) $2,746 Avg Close — Range —
Q4 2021
Shares 102,512 Value ($000) $1,650 Avg Close — Range —
Q4 2020
Shares 410,627 Value ($000) $1,367 Avg Close — Range —
Q1 2020
Shares 204,434 Value ($000) $384 Avg Close — Range —
Q4 2019
Shares 323,689 Value ($000) $2,023 Avg Close — Range —
Q1 2019
Shares 258,488 Value ($000) $1,879 Avg Close — Range —
Q4 2018
Shares 244,551 Value ($000) $2,167 Avg Close — Range —
Q3 2018
Shares 209,017 Value ($000) $1,463 Avg Close — Range —
Q4 2016
Shares 80,027 Value ($000) $868 Avg Close — Range —
Q3 2016
Shares 200,908 Value ($000) $2,694 Avg Close — Range —
Q2 2016
Shares 1,212,028 Value ($000) $18,944 Avg Close — Range —
Q4 2015
Shares 79,580 Value ($000) $1,733 Avg Close — Range —
Q3 2015
Shares 1,038,301 Value ($000) $21,088 Avg Close — Range —
Q2 2015
Shares 381,731 Value ($000) $9,620 Avg Close — Range —
Q4 2014
Shares 96,485 Value ($000) $1,998 Avg Close — Range —
Q1 2014
Shares 67,421 Value ($000) $1,371 Avg Close — Range —