ATHA vs ACIU

Analysts rate AC Immune S.

A. (ACIU) a "Buy" — based on 9 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

Over the past 5 years, AC Immune S.

A. (ACIU) delivered a total return of -52. 4%, compared to -97. 7% for Athira Pharma, Inc. (ATHA). Over 10 years, the gap is even starker: ACIU returned -81. 3% versus ATHA's -97. 5%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Athira Pharma, Inc.

(ATHA) is the lower-risk stock at 1. 47β versus AC Immune S. A. 's 1. 63β — meaning ACIU is approximately 11% more volatile than ATHA relative to the S&P 500. On balance sheet safety, Athira Pharma, Inc. (ATHA) carries a lower debt/equity ratio of 3% versus 10% for AC Immune S. A. — giving it more financial flexibility in a downturn.

On earnings-per-share growth, the picture is similar: Athira Pharma, Inc.

grew EPS 2. 0% year-over-year, compared to -37. 3% for AC Immune S. A.. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Athira Pharma, Inc.

(ATHA) is the more profitable company, earning 0. 0% net margin versus -1971. 6% for AC Immune S. A. — meaning it keeps 0. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ATHA leads at 0. 0% versus -1927. 3% for ACIU. At the gross margin level — before operating expenses — ACIU leads at 100. 0%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

For long-horizon retirement investors, Athira Pharma, Inc.

(ATHA) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding. AC Immune S. A. (ACIU) carries a higher beta of 1. 63 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (ATHA: -97. 5%, ACIU: -81. 3%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Healthcare sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.