Security key
86614U100
SUMMIT MATERIALS INC -CL A - COMMON STOCK (SUM)
CUSIP: 86614U100
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 2
- Total 13F value
- $105
- Share change
- 0
- SEC-reported price per share
- $52.50
- Number of holders
- 1
- Shares outstanding
- 178,464,433
Holder snapshot
3 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
1
Top holders
1
SUM full security history
Ownership snapshot
Full 13F holder table
Previous quarter: Q1 2026
Summit Materials, Inc. SEC filings
Summit Materials, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 86614U100
Recent filing periods:
Ownership snapshot
Top reported holders of SUM - SUMMIT MATERIALS INC -CL A - COMMON STOCK (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
PRICE T ROWE ASSOCIATES I...
Disclosed value leader
Argos SEM, LLC
Comparable rows
2/7
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 3%
5 rows are not safely comparable across share classes.
13D/G row: PRICE T ROWE ASSOCIATES INC /MD/
Showing 1-6 of 7 holder rows.
Quick read
PRICE T ROWE ASSOCIATES INC /MD/ leads the comparable SEC ownership view at 3%.
2 of 7 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens PRICE T ROWE ASSOCIATES INC /MD/'s linked filing trail.
Comparable ownership
Top 2
PRICE T ROWE ASSOCIATES INC /MD/
3%
HUNTINGTON NATIONAL BANK
0%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 7 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| PRICE T ROWE ASSOCIATES INC /MD/ |
13D/G
T. Rowe Price Associates, Inc.
|
3%
|
$270,908,474
5,353,933 shares
|
$0 | 31 Dec 2024 |
| HUNTINGTON NATIONAL BANK |
13F
Company
|
0%
|
$105
2 shares
|
— | 31 Mar 2026 |
| Argos SEM, LLC |
3/4/5
Director, 10%+ Owner
|
—
mixed-class rows
|
$1,751,040,000
54,720,001 shares
mixed-class rows
|
— | 12 Jan 2024 |
| Brian James Harris |
3/4/5
EVP & Chief Financial Officer
|
—
mixed-class rows
|
$7,359,552
229,986 shares
mixed-class rows
|
— | 28 Feb 2023 |
| Kekin Ghelani |
3/4/5
Chief Strategy&Growth Officer
|
—
mixed-class rows
|
$1,293,707
30,390 shares
mixed-class rows
|
— | 07 Mar 2024 |
| John R. Murphy |
3/4/5
Director
|
—
class O/S missing
|
$687,968
21,499 shares
|
— | 29 Sep 2023 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
1
Shares
2
Rows available
1
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
1
Q2 2026 holders
1
Holder diff
0
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend