SUMMIT MATLS INC

CUSIP: 86614U100 Class: Common Stock

GILDER GAGNON HOWE & CO LLC's Holding History (CIK: 0000902464)

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

Q2 2018
Shares 345,564 Value ($000) $9,071 Avg Close — Range —
Q1 2018
Shares 461,840 Value ($000) $13,985 Avg Close — Range —
Q4 2017
Shares 445,864 Value ($000) $14,018 Avg Close — Range —
Q3 2017
Shares 452,937 Value ($000) $14,508 Avg Close — Range —
Q2 2017
Shares 457,533 Value ($000) $13,209 Avg Close — Range —
Q1 2017
Shares 343,092 Value ($000) $8,478 Avg Close — Range —
Q4 2016
Shares 300,015 Value ($000) $7,137 Avg Close — Range —
Q3 2016
Shares 299,300 Value ($000) $5,552 Avg Close — Range —
Q2 2016
Shares 326,793 Value ($000) $6,686 Avg Close — Range —
Q1 2016
Shares 337,092 Value ($000) $6,556 Avg Close — Range —
Q4 2015
Shares 290,820 Value ($000) $5,828 Avg Close — Range —
Q3 2015
Shares 307,536 Value ($000) $5,772 Avg Close — Range —
Q2 2015
Shares 137,220 Value ($000) $3,499 Avg Close — Range —
Q1 2015
Shares 69,805 Value ($000) $1,546 Avg Close — Range —