Who owns Summit Materials, Inc., from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
T. Rowe Price Associates, Inc.: 3.0% · 5,353,933 shares
GRUPO ARGOS S.A.: 0.0% · 0 shares — CEMENTOS ARGOS S.A.: 0.0% · 0 shares — ARGOS SEM, LLC: 0.0% · 0 shares
Every institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of Summit Materials, Inc. they hold. Together these 1 managers report 0.00% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| HUNTINGTON NATIONAL BANK | $105 | 2 | 0.00% | 0.00% | June 30, 2026 |
Funds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 411 funds hold 91.89% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND | $195M | 0.01% | 5.49% | December 31, 2024 |
| iShares Russell 2000 ETF | $165M | 0.23% | 4.65% | December 31, 2024 |
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See every fund holding Summit Materials, Inc. and what share of its net assets the position represents.
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