Summit Materials Inc. announced results for the third quarter ended Sept. 28, reporting that net revenue increased $369.9 million, or 49.9%, in the third quarter to $1,111.8 million. In the quarter, $403.4 million of net revenue was due to acquisitions, primarily the Argos USA transaction. Divestitures decreased net revenue by $43.6 million in the period. All lines of business experienced organic pricing growth.
Operating income increased in the third quarter by 52.1% to $194.7 million largely due to the Argos USA transaction. Summit’s operating margin percentage for the three months ended September 28, 2024, increased to 17.5% from 17.2%.
Net income attributable to Summit Inc. decreased to $105.2 million, or $0.60 per basic share, compared to $230.0 million, or $1.93 per basic share in the prior year period. The decrease is due primarily to the tax receivable benefit recognized in the third quarter of 2023 of $153.1 million.
Summit reported adjusted diluted net income of $131.2 million, or $0.75 per adjusted diluted share, compared to an adjusted diluted net income of $97.5 million, or $0.81 per adjusted diluted share, in the prior year period.
Aggregates net revenues increased by $12.5 million to $192.3 million in the third quarter. Aggregates adjusted cash gross profit margin decreased to 58.5% in the third quarter as compared to 59.0% in the prior year period.
Aggregates sales volume decreased 1.8% in the third quarter as a result of divestitures. Organic aggregates sales volumes increased 0.7% primarily driven by Utah, British Columbia and the Carolinas.
Average selling prices for aggregates increased 7.4%, with organic pricing growth of 6.9%. Pricing growth was strong throughout the footprint and led by the East Segment, which increased 8.3% versus the prior year period.
Cement Segment net revenues increased to $323.2 million in the third quarter. Cement Segment adjusted cash gross profit margin increased to 47.2% in the third quarter, compared to 46.3% in the prior year period.
Sales volume of cement increased 203.1% while organic sales volumes decreased 11.3% due to a combination of adverse weather conditions and moderating demand leading to, in part, lower imported volumes versus the prior year period. Organic average selling prices increased 3.9% in the third quarter, primarily reflecting increases implemented earlier in the year.
Products net revenues were $516.4 million in the third quarter, up 48.9% versus the prior year period. Products adjusted cash gross profit margin decreased to 17.8% in the third quarter. Organic average sales price for ready-mix concrete increased 5.5%, with pricing growth in both segments.

Organic sales volumes of ready-mix concrete decreased 10.0% due to unfavorable weather conditions and subdued private end-market activity. Organic average selling prices for asphalt increased 4.5%. Organic sales volume increased 0.4%, driven by growth in North Texas.”Our materials-led portfolio delivered another resilient quarter of financial results, even amid significant rainfall and severe weather events that impacted many of our key markets,” commented Anne Noonan, Summit Materials president and CEO. “I’m incredibly proud of our teams that responded safely and with agility to produce an Elevate-era record for EBITDA margins and take valuable steps towards achieving our strategic agenda. Today, due to volumes below prior expectations and including valuable self-help offsets, we are refining the mid-point of our full year guide to $985 million. Concurrently and thanks to strong execution, we are increasing our Adjusted EBITDA margin expectations to at least 24% in 2024. Without question, our Summit team has successfully navigated a dynamic environment to strengthen our business, improve our commercial and operational capabilities, and critically, build momentum as we focus on the fourth quarter and our path forward in 2025.”
Scott Anderson, executive vice president and CFO of Summit Materials added, “Our capital allocation strategy is designed to unlock growth in a disciplined, returns-focused manner. With nearly $740 million in cash on hand and a capable balance sheet, Summit is well-equipped to invest in top growth prospects, both organic and inorganic, driving long-term sustainable returns for our shareholders.”
Results by segment:
West Segment: The West Segment operating income increased $6.2 million to $95.8 million. Adjusted EBITDA increased $10.5 million, or 8.9%, to $128.4 million in the third quarter. Aggregates revenue increased 1.5%, driven by continued pricing growth. Pricing grew 6.2% over the prior period led by double-digit growth in certain Texas markets, as well as Arizona. Ready-mix concrete revenue increased 10.6% on 3.3% pricing growth and 7.1% volume growth. Organic ready-mix pricing increased 5.4%. Restrained private construction activity and weather headwinds drove organic ready-mix volumes down 10.4% in the period. Asphalt revenue increased 4.9% reflecting a volume increase of 0.4% and pricing growth of 4.5%.
East Segment: The East Segment operating income increased $16.5 million to $50.7 million and Adjusted EBITDA increased $20.2 million to $70.3 million. Aggregates revenue increased 9.5% versus the prior year period. Organic Aggregates volumes increased 1.1%, with the Carolinas and Missouri markets offsetting softness in Kansas. Aggregates pricing increased 8.3% with most markets realizing high single-digit or double-digit growth. Ready-mix concrete revenue increased $142.3 million to $165.4 million due to the acquisition of the Argos USA ready-mix concrete operations in Florida, Georgia and the Carolinas. Asphalt revenue decreased $7.8 million versus the prior year period due to divestiture of asphalt assets.
Cement Segment: The Cement Segment operating income increased 142.5% to $92.8 million. Adjusted EBITDA increased $89.7 million, primarily from the Argos USA transaction. Adjusted EBITDA margin increased to 43.3% from 41.5%. As noted above, the Cement Segment reported an organic volume decrease of 11.3% and organic selling price growth of 3.9%.