Cortina Asset Management’s Summit Materials, Inc. Class A Common Stock SUM Stock Holding History

Cortina Asset Management’s Portfolio SUM Stock Details SUM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2018 Q4	–	Sell	-328,761	Closed	-$5.88M	–	242
2018 Q3	$5.88M	Buy	328,761 +62,392	+23%	+$1.36M	0.27%	137
2018 Q2	$6.88M	Buy	266,369 +46,337	+21%	+$1.29M	0.32%	107
2018 Q1	$6.55M	Sell	220,032 -31,922	-13%	-$985K	0.32%	110
2017 Q4	$7.79M	Sell	251,954 -12,508	-5%	-$376K	0.34%	101
2017 Q3	$8.21M	Sell	264,462 -32,902	-11%	-$934K	0.34%	92
2017 Q2	$8.32M	Sell	297,364 -29,487	-9%	-$768K	0.35%	84
2017 Q1	$7.83M	Sell	326,851 -80,612	-20%	-$1.89M	0.33%	104
2016 Q4	$9.4M	Sell	407,463 -58,017	-12%	-$1.22M	0.39%	83
2016 Q3	$8.27M	Buy	465,480 +230,570	+98%	+$4.46M	0.36%	93
2016 Q2	$4.61M	Buy	234,910 +187,540	+396%	+$3.75M	0.21%	181
2016 Q1	$883K	Sell	47,370 -700,897	-94%	-$11.5M	0.04%	220
2015 Q4	$14.4M	Buy	748,267 +217,469	+41%	+$4.43M	0.65%	47
2015 Q3	$9.41M	Buy	+530,798	New	+$12.2M	0.43%	84

Other funds holding SUM

SAM

Southeastern Asset Management Memphis, Tennessee $1.92B AUM 6.41% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Janus Henderson Group London $209B AUM 37.72% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return

Jennison Associates New York $167B AUM 44.17% 1-Year Est. Return

Principal Financial Group Des Moines, Iowa $204B AUM 27.99% 1-Year Est. Return

Putnam Investments Boston, Massachusetts $75.7B AUM 34.45% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

TCM

TimesSquare Capital Management New York $6.8B AUM 45.85% 1-Year Est. Return

Cortina Asset Management's SUM Position: Q4 2018 in Review

Cortina Asset Management sold out of Summit Materials, Inc. Class A Common Stock (SUM) in Q4 2018, closing a stake of 328,761 shares — an estimated $5.88M sold.

Cortina Asset Management first reported a position in SUM in Q3 2015 and held it in 13 quarters. The position peaked at $14.4M in Q4 2015. 197 funds tracked by Wall St. Rank hold SUM as of Q4 2018.

Cortina Asset Management reported no remaining Summit Materials, Inc. Class A Common Stock position as of Q4 2018 after selling out during the quarter.
Cortina Asset Management sold 328,761 Summit Materials, Inc. Class A Common Stock shares in Q4 2018, an estimated $5.88M.
Cortina Asset Management first reported a position in Summit Materials, Inc. Class A Common Stock in Q3 2015 and held it in 13 quarters.
Cortina Asset Management's Summit Materials, Inc. Class A Common Stock position peaked at $14.4M in Q4 2015.
197 funds tracked by Wall St. Rank held Summit Materials, Inc. Class A Common Stock as of Q4 2018.

Based on Cortina Asset Management's 13F filing for Q4 2018, filed 12 Feb 2019.