AES vs CEPU: Which Is the Better Buy in 2026?

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.

Reading it: AES 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.

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. AES and CEPU 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 AES and CEPU 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.

The AES Corporation is a global electricity company that operates across four segments: Renewables, Utilities, Energy Infrastructure, and New Energy Technologies. It owns or operates a generation fleet of roughly 34,740 megawatts spanning solar, wind, hydro, energy storage, gas, and legacy coal, and it distributes power to about 2.7 million utility customers. A key growth engine has been its renewables development pipeline, with a signed power purchase agreement backlog of about 12.6 gigawatts (around 5.6 GW under construction) as of March 2026, much of it tied to surging electricity demand from AI and cloud data centers. The company has been executing a coal exit while leaning into contracted clean generation and its regulated US utilities.

Full AES guide

Central Puerto S.A. is the largest privately owned electricity generation company in Argentina, with roughly 6,933 MW of installed capacity spread across thermal (combined cycle, gas and steam turbine, co-generation) and renewable (hydro, wind, solar) technologies. The company operates in electric power generation from conventional and renewable sources, plus adjacent businesses in natural gas transport, forestry, and mining. It trades on Buenos Aires (BYMA) and, for US investors, as an ADR on the NYSE under CEPU, where each ADR represents 10 underlying shares.

Full CEPU guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• AES drivers: Pending $15.00 cash acquisition; Renewables backlog and data-center demand.
• CEPU drivers: Capacity growth and acquisitions; Renewables and solar expansion.

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: The largest risk is deal-specific: a delay, regulatory block, or renegotiation of the $15.00 cash acquisition would remove the price support the stock currently enjoys. For CEPU, central Puerto's profitability depends heavily on Argentina's regulated remuneration for power generation, which the government adjusts periodically and can change with little notice.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick AES if you believe its drivers more; CEPU if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the AES and CEPU guides.

AES. AES trades around the $15.00 cash offer, so headline multiples (a trailing P/E near the low teens and a forward P/E that looks low on 2026 estimates) matter less than the fixed deal price and the odds and timing of a close. The high debt load, roughly $31 billion, is typical of a capital-intensive utility but is a key reason the enterprise value (around $33 billion) is far larger than the equity value. Figures are approximate and drawn from mid-2026 filings and market data.

CEPU. Full-year 2025 revenue rose about 17% to roughly $783 million with adjusted EBITDA near $337 million, and net income jumped to about $254 million from roughly $52 million in 2024. First-quarter 2026 revenue was about $249 million, up 27% year over year. The trailing multiple near 7x as of JULY 2026 looks inexpensive on headline numbers, but that discount reflects Argentine macro and regulatory risk rather than a clean read on operating quality.

Headline figures (approximate, July 2026): AES shows revenue (ttm) ~$12.6B, q1 2026 revenue ~$3.18B (+9% YoY), market cap ~$10.7B, acquisition price $15.00/share cash; CEPU shows revenue (2025 fy) ~$783M, revenue (q1 2026) ~$249M, adjusted ebitda (2025) ~$337M, net income (2025) ~$254M.

AES and CEPU 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 AES and CEPU exposure against your real portfolio. It is not an investment adviser.