Summit Materials Ownership

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

Recent Insider Transactions

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	1,015,944	0.565%
Public Companies	54,828,642	30.5%
Institutions	123,892,562	68.9%

Dilution of Shares: Shareholders have been diluted in the past year, with total shares outstanding growing by 46%.

Top Shareholders

Top 25 shareholders own 84.04% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
31.2%	Grupo Argos S.A.	54,720,000	US$2.6b	0%	no data
7.01%	The Vanguard Group, Inc.	12,316,399	US$596.0m	0.72%	0.01%
5.72%	BlackRock, Inc.	10,049,019	US$486.3m	-2.19%	0.01%
5.24%	T. Rowe Price Group, Inc.	9,209,499	US$445.6m	4.26%	0.04%
4.35%	Massachusetts Financial Services Company	7,639,798	US$369.7m	5.95%	0.08%
3.01%	Principal Global Investors, LLC	5,292,839	US$256.1m	1.82%	0.12%
2.83%	Macquarie Investment Management Business Trust	4,975,356	US$240.8m	-1.3%	0.28%
2.38%	Dimensional Fund Advisors LP	4,182,253	US$202.4m	-3.36%	0.03%
2.08%	Invesco Ltd.	3,654,807	US$176.9m	-7.81%	0.05%
2.03%	River Road Asset Management, LLC	3,567,938	US$172.7m	15.9%	2.14%
1.75%	ClearBridge Investments, LLC	3,081,361	US$149.1m	-2.91%	0.11%
1.71%	Victory Capital Management Inc.	3,004,085	US$145.4m	-18.3%	0.13%
1.6%	Frontier Capital Management Co LLC	2,804,724	US$135.7m	-4.46%	1.15%
1.59%	Geode Capital Management, LLC	2,789,212	US$135.0m	0.34%	0.01%
1.58%	Janus Henderson Group plc	2,771,481	US$134.1m	0.08%	0.05%
1.58%	State Street Global Advisors, Inc.	2,769,174	US$134.0m	-0.23%	no data
1.41%	Millennium Management LLC	2,478,643	US$119.9m	-9.99%	0.1%
1%	Charles Schwab Investment Management, Inc.	1,752,993	US$84.8m	21.8%	0.01%
0.91%	Columbia Management Investment Advisers, LLC	1,605,414	US$77.7m	-2.6%	0.02%
0.88%	American Century Investment Management Inc	1,550,845	US$75.0m	-11.2%	0.04%
0.88%	Segall Bryant & Hamill, LLC	1,547,312	US$74.9m	6.48%	0.93%
0.86%	AllianceBernstein L.P.	1,516,201	US$73.4m	-8.44%	0.02%
0.83%	Teachers Insurance and Annuity Association-College Retirement Equities Fund	1,461,865	US$70.7m	-17.7%	0.02%
0.82%	Northern Trust Global Investments	1,432,648	US$69.3m	1.63%	0.01%
0.8%	Norges Bank Investment Management	1,409,566	US$68.2m	0%	0.01%