INDEPENDENCE CONTRACT DRIL I

CUSIP: 453415309 Class: COM

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

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

Q4 2019
Shares 1,466,629 Value ($000) $1,461 Avg Close — Range —
Q3 2019
Shares 1,682,524 Value ($000) $2,019 Avg Close — Range —
Q2 2019
Shares 1,746,843 Value ($000) $2,760 Avg Close — Range —
Q1 2019
Shares 1,715,706 Value ($000) $4,753 Avg Close — Range —
Q4 2018
Shares 1,548,482 Value ($000) $4,833 Avg Close — Range —
Q3 2018
Shares 1,336,723 Value ($000) $6,603 Avg Close — Range —
Q2 2018
Shares 1,130,695 Value ($000) $4,658 Avg Close — Range —
Q1 2018
Shares 958,671 Value ($000) $3,624 Avg Close — Range —
Q4 2017
Shares 749,935 Value ($000) $2,985 Avg Close — Range —
Q3 2017
Shares 606,926 Value ($000) $2,306 Avg Close — Range —
Q2 2017
Shares 473,258 Value ($000) $1,841 Avg Close — Range —
Q1 2017
Shares 256,486 Value ($000) $1,413 Avg Close — Range —