Security key
86614U100
SUMMIT MATERIALS INC -CL A - COMMON STOCK (SUM)
CUSIP: 86614U100
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 2
- Total 13F value
- $105
- Share change
- -3,400
- SEC-reported price per share
- $52.50
- Number of holders
- 1
- Value change
- -$132,702
- Number of sells
- 1
- Shares outstanding
- 178,464,433
Holder snapshot
5 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
1
Top holders
1
SUM full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
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
4/9
Latest evidence
30 Sep 2025
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 9 holder rows.
Quick read
PRICE T ROWE ASSOCIATES INC /MD/ leads the comparable SEC ownership view at 3%.
4 of 9 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 4
PRICE T ROWE ASSOCIATES INC /MD/
3%
Strengthening Families & Communit...
0%
WFA Asset Management Corp
0%
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 9 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 |
| Strengthening Families & Communities, LLC |
13F
Company
|
0%
|
$132,702
3,400 shares
|
— | 30 Sep 2025 |
| WFA Asset Management Corp |
13F
Company
|
0%
|
$7,338
188 shares
|
— | 30 Sep 2025 |
| HUNTINGTON NATIONAL BANK |
13F
Company
|
0%
|
$105
2 shares
|
— | 30 Sep 2025 |
| 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 |
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 Q4 2025
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 Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
3
Q4 2025 holders
1
Holder diff
-2
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend