Summit Materials Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NYSE:SUM Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Role	Shares	Max Price
26 May 22	SellUS$223,914	Christopher Gaskill	Individual		8,241.77	US$27.17

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of SUM?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	491,584	0.4%
Institutions	122,343,143	99.6%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 80.67% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
9.83%	The Vanguard Group, Inc.	11,634,464	$398.5m	1%	0.01%
7.95%	BlackRock, Inc.	9,413,750	$322.4m	-1.66%	0.01%
7.58%	T. Rowe Price Group, Inc.	8,970,267	$307.2m	-1.78%	0.03%
6.15%	Principal Global Investors, LLC	7,279,610	$249.3m	1.74%	0.15%
5.93%	Capital Research and Management Company	7,022,826	$240.5m	-0.01%	0.01%
4.82%	Dimensional Fund Advisors LP	5,705,814	$195.4m	1.84%	0.04%
4.16%	Franklin Resources, Inc.	4,923,331	$168.6m	21.52%	0.06%
4.02%	FMR LLC	4,757,627	$162.9m	-49.03%	0.01%
3.97%	Macquarie Investment Management Business Trust	4,701,168	$161.0m	1%	0.15%
2.72%	Janus Henderson Group plc	3,219,912	$110.3m	0.04%	0.05%
2.72%	ClearBridge Investments, LLC	3,216,585	$110.2m	0%	0.09%
2.52%	Jennison Associates LLC	2,987,250	$102.3m	20.7%	0.08%
2.11%	State Street Global Advisors, Inc.	2,493,008	$85.4m	1.83%	no data
2.08%	Invesco Ltd.	2,459,119	$84.2m	0.37%	0.02%
1.84%	Eagle Asset Management, Inc.	2,176,870	$74.6m	-1.8%	0.41%
1.79%	Geode Capital Management, LLC	2,117,708	$72.5m	1.08%	0.01%
1.56%	Goldman Sachs Asset Management, L.P.	1,841,410	$63.1m	30.85%	0.02%
1.29%	Northern Trust Global Investments	1,526,644	$52.3m	-0.54%	0.01%
1.25%	Victory Capital Management Inc.	1,483,558	$50.8m	-20.37%	0.05%
1.19%	Teachers Insurance and Annuity Association-College Retirement Equities Fund	1,404,407	$48.1m	1.86%	0.01%
1.07%	Thrivent Investment Management, Inc.	1,264,604	$43.3m	7.1%	0.1%
1.06%	Charles Schwab Investment Management, Inc.	1,259,509	$43.1m	-1.67%	0.01%
1.04%	Columbia Management Investment Advisers, LLC	1,226,455	$42.0m	70.88%	0.01%
1.03%	American Century Investment Management Inc	1,224,191	$41.9m	11.81%	0.03%
1.02%	Sasco Capital, Inc.	1,210,453	$41.5m	0%	4.67%