Summit Materials Inc. Class ASUM
13F holders, Q3 2025 (September 30)3holders +1
1new positions
0sold out
$39.04avg. 13F price*
At the end of Q3 2025, 3 institutions reported holding Summit Materials Inc. Class A (SUM) in their 13F filings, up 1 from Q2 2025. 1 opened new positions and 0 sold out. The largest holders were Strengthening Families & Communities, LLC ($133K), WFA Asset Management Corp ($7K) and Huntington National Bank ($105).
- Company
- Summit Materials Inc. Class A
- CUSIP
- 86614U100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 1 | $133K |
| Exits | 0 | $0 |
All 13F filers, Q2 2025 → Q3 2025: 3,400 shares bought, net +3,400 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 3 holders
| Strengthening Families & Communities, LLC | 0.03% | New | 3,400 | $133K |
| WFA Asset Management Corp | 0.00% | No change | 188 | $7K |
| Huntington National Bank | 0.00% | No change | 2 | $105 |
"% of holder's portfolio" is SUM's weight in each manager's 13F, not the share of Summit Materials Inc. Class A the manager owns.