Westfield Capital Management’s Summit Materials, Inc. Class A Common Stock SUM Stock Holding History

Westfield Capital 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
2019 Q4	–	Sell	-1,880,249	Closed	-$41M	–	255
2019 Q3	$41M	Sell	1,880,249 -629,716	-25%	-$12.4M	0.33%	103
2019 Q2	$47.5M	Sell	2,509,965 -362,987	-13%	-$5.77M	0.36%	100
2019 Q1	$44.8M	Buy	2,872,952 +182,409	+7%	+$2.85M	0.34%	96
2018 Q4	$32.8M	Buy	2,690,543 +315,586	+13%	+$4.36M	0.28%	115
2018 Q3	$42.5M	Sell	2,374,957 -72,412	-3%	-$1.57M	0.3%	112
2018 Q2	$63.2M	Sell	2,447,369 -562,249	-19%	-$15.7M	0.47%	71
2018 Q1	$89.6M	Sell	3,009,618 -301,901	-9%	-$9.31M	0.69%	47
2017 Q4	$102M	Sell	3,311,519 -137,362	-4%	-$4.13M	0.78%	31
2017 Q3	$107M	Buy	3,448,881 +366,009	+12%	+$10.4M	0.82%	27
2017 Q2	$86.3M	Buy	3,082,872 +1,619,872	+111%	+$42.2M	0.74%	40
2017 Q1	$35.1M	Sell	1,463,000 -123,571	-8%	-$2.9M	0.3%	116
2016 Q4	$36.6M	Buy	1,586,571 +331,204	+26%	+$6.95M	0.32%	109
2016 Q3	$22.3M	Buy	1,255,367 +131,198	+12%	+$2.54M	0.18%	163
2016 Q2	$22M	Buy	+1,124,169	New	+$22.5M	0.18%	153

Other funds holding SUM

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

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

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

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

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

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

Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return

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

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

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

Westfield Capital Management's SUM Position: Q4 2019 in Review

Westfield Capital Management sold out of Summit Materials, Inc. Class A Common Stock (SUM) in Q4 2019, closing a stake of 1,880,249 shares — an estimated $41M sold.

Westfield Capital Management first reported a position in SUM in Q2 2016 and held it in 14 quarters. The position peaked at $107M in Q3 2017. 214 funds tracked by Wall St. Rank hold SUM as of Q4 2019.

Westfield Capital Management reported no remaining Summit Materials, Inc. Class A Common Stock position as of Q4 2019 after selling out during the quarter.
Westfield Capital Management sold 1,880,249 Summit Materials, Inc. Class A Common Stock shares in Q4 2019, an estimated $41M.
Westfield Capital Management first reported a position in Summit Materials, Inc. Class A Common Stock in Q2 2016 and held it in 14 quarters.
Westfield Capital Management's Summit Materials, Inc. Class A Common Stock position peaked at $107M in Q3 2017.
214 funds tracked by Wall St. Rank held Summit Materials, Inc. Class A Common Stock as of Q4 2019.

Based on Westfield Capital Management's 13F filing for Q4 2019, filed 13 Feb 2020.