PKG vs SW: Which Is the Better Buy in 2026?
Last updated August 2026
Short answer
PKG and SW are similarly sized, but SW trades noticeably cheaper on forward earnings (13.75x vs 19.39x): the market is paying up for PKG's profile and pricing SW more conservatively, or for faster growth. Which you prefer comes down to the drivers you believe, and whether adding either over-concentrates what you already own.
PKG vs SW: the tie-breaker metrics
Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.
| Metric | PKG | SW | What it tells you |
|---|---|---|---|
| Market cap | $21.90B | $24.11B | Size. The larger name is the incumbent; the smaller has more room to grow and more to prove. |
| Forward P/E | 19.39 | 13.75 | Valuation on next year's expected earnings, the same yardstick for both. Lower is cheaper for that growth; higher means the market is paying up. |
| Trailing P/E | 31.97 | 48.90 | Valuation on the last 12 months. A big drop from trailing to forward means the market expects earnings to jump, so more growth is already in the price. |
| Beta | 0.82 | 0.94 | Volatility vs the market. Above 1 swings harder than the index; below 1 is steadier. Higher beta means bigger drawdowns to hold through. |
| Price vs 52-week range | 81% of range | 66% of range | Where today's price sits between the 52-week low and high. Near the high is momentum with less margin of safety; near the low is out of favor or a discount, depending on why. |
| Price / book | 4.74 | 1.34 | How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price. |
Reading it: SW is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.
Before you buy: how PKG and SW affect your concentration
The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. PKG and SW share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.
This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined PKG and SW exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.
What does Packaging Corporation of America (PKG) do?
Packaging Corporation of America makes containerboard and the corrugated boxes and displays that carry most physical goods, plus a smaller Paper segment producing uncoated freesheet (office and printing papers). It runs a highly integrated network of mills and box plants, which lets it convert most of the containerboard it makes into finished packaging for food, beverage, e-commerce, and industrial customers. That vertical integration and a low-cost mill base are the core of its reputation for consistent margins in a commodity-exposed industry.
What does Smurfit WestRock (SW) do?
Smurfit WestRock (NYSE: SW) makes containerboard, corrugated boxes, and consumer packaging at industrial scale, operating roughly 500 converting plants and around 60 paper mills across some 40 countries with about 23 million tons of mill capacity. The company was created in July 2024 when Smurfit Kappa and WestRock combined to form the largest listed global packaging partner, pairing Smurfit's European operating discipline with WestRock's North American footprint and consumer-packaging lines. Its products serve food, beverage, e-commerce, industrial, and consumer-goods customers, and the business is closely tied to global trade volumes, retail demand, and the price of recovered fiber and energy.
PKG vs SW: how do they differ?
Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.
- PKG drivers: Volume share gains; Price realization catching up to costs.
- SW drivers: Merger synergies and capacity rationalization; Global scale and integrated fiber network.
Which fits which kind of investor
A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: PKG is cyclical and tied to the goods economy, so a slowdown in shipping and box demand can cut volumes and pricing at the same time. For SW, sW is deeply cyclical: containerboard pricing, box volumes, and recovered-fiber costs swing with the global economy and can compress margins quickly.
PKG or SW: which should you pick?
PKG vs SW: the full fundamentals
PKG. PKG trades at a mid-to-high 20s trailing earnings multiple, a premium to some packaging peers that reflects its integration and margin consistency. Q1 2026 net sales rose to about $2.4 billion from $2.1 billion a year earlier on double-digit volume growth, though EPS came in below some estimates as input and maintenance costs weighed on margins. The valuation and dividend framing here are approximate and change with the market.
SW. SW trades as a large-cap cyclical value and income name, with a market cap near ~$24 billion against a revenue base of roughly ~$31 billion. Reported earnings have been depressed by merger-related costs and a tough cost environment, so headline P/E figures look elevated while forward estimates assume margin recovery. The ~4 percent dividend yield is a central part of the total-return case.
Headline figures (approximate, July 2026): PKG shows market cap ~$19 billion, revenue (ttm) ~$9 billion, q1 2026 net sales ~$2.4 billion, q1 2026 eps (ex-items) ~$2.40; SW shows revenue (ttm) ~$31B, q1 2026 net sales ~$7.7B, q1 2026 adj. ebitda ~$1.08B (~14% margin), market cap ~$24B.
The bottom line: PKG vs SW
PKG and SW are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined PKG and SW exposure against your real portfolio. It is not an investment adviser.
Wondering how PKG or SW fits the portfolio you already own? Walnut is an AI investing app that connects your brokerage read-only and answers questions like that about your actual holdings: overlap, concentration, and how each position tracks the S&P 500. Compare the best AI portfolio analyzers or see the best AI investing apps in 2026.
Investing in Packaging Corporation of America with AI
Connect the broker you already use and ask Walnut's AI how PKG fits what you actually hold: whether you own it already through a fund, what it would do to your concentration, and how it has tracked the S&P 500. Read-only by default, and you approve anything before it reaches your broker.
FAQ
What is the difference between PKG and SW?
+
Packaging Corporation of America makes containerboard and the corrugated boxes and displays that carry most physical goods, plus a smaller Paper segment producing uncoated freesheet (office and printing papers). Smurfit WestRock (NYSE: SW) makes containerboard, corrugated boxes, and consumer packaging at industrial scale, operating roughly 500 converting plants and around 60 paper mills across some 40 countries with about 23 million tons of mill capacity. They show up together because they share investment themes, but they are different businesses, so the better fit depends on which thesis you are expressing.
Is PKG or SW the better stock?
+
Neither is universally better; they suit different views and risk levels. Walnut is informational, not investment advice. Compare what each does, the tie-breaker metrics above, and the risks, then decide which fits your thesis and what you already own.
Which is cheaper, PKG or SW?
+
On forward P/E (as of August 2026), PKG trades at 19.39x and SW at 13.75x, so SW is the cheaper of the two on next year's expected earnings. A lower multiple is not automatically the better buy: a richer valuation can be justified by faster growth, and a lower one can reflect real risk. Weigh the multiple against how fast each business is compounding.
Should you own both PKG and SW?
+
Because they share themes, owning both concentrates you in that theme. That can be intentional (a focused bet) or accidental (less diversification than it looks). Walnut can show your combined exposure across both, and whether adding either over-concentrates you, before you buy.
What are the risks of PKG vs SW?
+
PKG: PKG is cyclical and tied to the goods economy, so a slowdown in shipping and box demand can cut volumes and pricing at the same time. Containerboard is partly a commodity, meaning industry capacity additions or price declines can squeeze margins the company cannot fully control. Input costs (fiber, energy, freight, chemicals) and heavy scheduled maintenance can pressure earnings even in decent demand periods, as seen when operating margin fell to about 10.7% from 13.1% year over year. The Paper segment faces structural decline in office-paper demand. Finally, as a single-industry manufacturer, PKG lacks the diversification of a broader materials or industrials holding. SW: SW is deeply cyclical: containerboard pricing, box volumes, and recovered-fiber costs swing with the global economy and can compress margins quickly. Energy and freight inflation have already pressured recent quarters, and Q1 2026 EPS missed expectations. Integrating two very large companies carries execution risk, and promised synergies may arrive slower or smaller than targeted. The company also carries substantial debt taken on around the merger, and intense competition from International Paper, Packaging Corp of America, DS Smith, and others limits pricing power. A weaker consumer or industrial demand backdrop would hit both volumes and price at once.
Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell PKG or SW; figures are approximate and dated (as of August 2026). Verify current data before investing.