PKG — Q3 2026 Financial Report Analysis

Packaging Corporation of America (PCA) makes containerboard, the heavy brown paper that cardboard boxes are made from, and runs the corrugated plants that turn it into boxes. It also has a smaller business making white office paper. In the third quarter of 2026 (July–September), net sales rose 12.5% to $2,602 million and GAAP diluted EPS rose 16.7% to $2.93. Excluding one-off "special items", EPS was $3.04, up 11.4% from $2.73 and $0.13 above the $2.91 management had guided to in July. The driver this time was price, not volume: in the original ("legacy") business, box shipments slipped 0.5%, but higher prices and a better product mix added $0.79 per share.

Key figures

Operating margin is the share of sales left after running the business, before interest and tax. EBITDA is operating profit before depreciation and amortization, the accounting charges that spread the cost of mills and machines over their lives; it is a rough gauge of cash earnings. "Excl. special items" figures are PCA's own non-GAAP measures that leave out charges or gains the company treats as one-off.

Takeaway: The price increases PCA announced in the first half arrived on schedule. Price and mix in Packaging went from a $0.11 per-share drag in Q2 to a $0.79 gain in Q3, while legacy box volume was flat. But costs ate most of it: freight, labor, fiber, corporate expense and depreciation together took $0.91, so the legacy business earned only $0.07 more per share than a year ago. The year-over-year growth came mostly from the acquired Greif mills, which swung from a $0.11 loss to a $0.13 profit.

Where the extra $0.31 of adjusted EPS came from

PCA breaks down the change in EPS excluding special items versus Q3 2025:

Note on the comparison: PCA bought Greif's containerboard business on September 2, 2025, so Q3 2025 already contained about one month of it (the $0.11 loss). This year has a full quarter. That is why total box shipments rose 10.6% while legacy shipments fell 0.5% on the same number of shipping days.

Segments

Packaging. Operating income excluding special items rose 17.2%, and the segment's margin on that basis rose to 16.9% from 16.3%. PCA's mills ran at full capacity, and the CEO credits production gains from projects at the Jackson mill and better running at the acquired Greif mills. Containerboard production was 1,489,000 tons, up from 1,415,000 tons in Q2. PCA also built 34,000 tons of containerboard inventory during the quarter, on purpose: it wants stock on hand to supply its box plants in Q4, when maintenance shutdowns cut output, and to limit freight costs. Inventory is still 29,000 tons below a year ago. The CEO also pointed to "some weakness in agricultural end markets" for boxes, and the comparison with guidance cites "unfavorable corrugated products sales volume."

Paper. Operating income fell 18.5% to $29.0 million. The main reasons are higher maintenance-outage expense (the planned shutdown at the International Falls mill fell in Q3: -$0.04 per share) and 2.5% lower sales volume. Price was positive (+$0.05). Management called it "another excellent quarter" because volume beat its own expectations, but the year-over-year comparison is down.

What the headline numbers hide

• GAAP vs adjusted. The gap is small this quarter: $12.5 million pre-tax ($0.11 per share) of special items, down from $26.3 million ($0.22) a year ago. They were $6.2 million of corrugated plant closure costs and renewable-energy project write-offs, $3.0 million of acquisition and integration costs, $3.0 million for a fire at a corrugated plant, and $0.3 million for the Wallula, Washington mill restructuring. For the first nine months, special items total $95.9 million pre-tax ($0.80 per share), $60.0 million of it Wallula. That explains why nine-month GAAP EPS is down ($6.98 vs $7.45) while adjusted EPS is up ($7.78 vs $7.52). PCA reports plant closure costs as one-off nearly every quarter, so readers should treat some level of them as a recurring cost.
• Cash conversion. The earnings release has no cash flow statement, so operating cash flow can't be compared with net income until the 10-Q is filed. What it does show: capital spending of $247.3 million in the quarter (vs $192.1 million) and $617.9 million year to date (vs $509.9 million), plus a 34,000-ton inventory build, both of which use cash. Cash and marketable securities were $761.8 million at September 30, down from $806.4 million a year earlier.
• Below the operating line. Net interest expense rose $13.0 million, mostly from debt taken on to buy Greif. Depreciation, amortization and depletion rose to $181.3 million from $152.6 million. The tax rate was about the same (25.9% vs 25.7%). Buybacks did little: diluted shares fell to 89.0 million from 89.7 million, worth $0.02 of EPS.
• One cost line to watch. Corporate and other expense excluding special items rose to $38.9 million from $32.7 million (-$0.13 per share). The release does not explain the increase.
• Guidance. Q3 came in $0.13 above guidance. Q4 is guided at $2.81, below Q3, and the release gives specific reasons (mill outages, fewer shipping days, higher costs).

Did last time's read hold up?

Mostly. Our Q2 report said Q3 guidance "depends on price more than on anything else" and that the price-and-mix line in the Q3 EPS bridge had to swing from a $0.11 drag to a clear positive. It swung to +$0.79, and EPS beat guidance. The risk we flagged also showed up: freight (-$0.26) and fiber (-$0.12) kept rising and absorbed a large share of the gain. What we did not expect was the volume slowdown: legacy box shipments went from +4.1% per day in Q2 to -0.5% in Q3.

Outlook

Management guides Q4 2026 EPS excluding special items to $2.81, down from Q3's $3.04. Its reasons:

• Box shipments per day at about last year's Q4 level, with two fewer shipping days than Q3; total shipments still higher than Q3.
• Containerboard and box prices improving further as earlier price increases keep flowing through contracts, but a seasonally weaker product mix as more e-commerce boxes ship.
• Lower containerboard production and "significantly higher" maintenance-outage costs, with planned shutdowns at three mills.
• Paper: seasonally lower volume, slightly higher prices.
• Higher freight as diesel prices rise above Q3 levels, rising recycled-fiber costs, higher wood-fiber costs from winter conditions, and higher chemical and energy costs.

Our read: the pricing part of the plan has worked, and the Greif mills now add profit instead of losses. The weak point is the legacy business, where cost increases nearly matched the price gains and volume stopped growing. Q4 guidance assumes more price still to come, but freight, fiber, chemicals and energy are all expected to rise at the same time. Mill outage costs are temporary. The things to watch into 2027 are whether legacy box volume returns to growth after the agricultural softness, and whether freight and fiber costs stop climbing once diesel prices settle. If both costs keep rising, the earlier price increases will mostly offset them rather than lift margins. The Q3 10-Q, once filed, will show whether the inventory build and higher capital spending held back operating cash flow.