CMPS vs. ATAI

Last updated Jun 23, 2026

CMPS (COMPASS Pathways plc) and ATAI (Atai Life Sciences N.V.) are both stocks. Both are in the Healthcare sector — CMPS in Medical Care Facilities, ATAI in Biotechnology. Over the past 5 years, CMPS returned -17.69%/yr vs -26.10%/yr for ATAI. A 0.51 correlation means they provide meaningful diversification when combined.

Performance

CMPS vs. ATAI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in COMPASS Pathways plc (CMPS) and Atai Life Sciences N.V. (ATAI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CMPS achieves a 83.04% return, which is significantly higher than ATAI's -0.98% return.

CMPS

• 1D: 0.80%
• 1M: 6.94%
• YTD: 83.04%
• 6M: 93.42%
• 1Y: 172.79%
• 3Y*: 17.13%
• 5Y*: -17.69%
• 10Y*: —

ATAI

• 1D: -0.25%
• 1M: -6.25%
• YTD: -0.98%
• 6M: -5.81%
• 1Y: 63.31%
• 3Y*: 37.73%
• 5Y*: -26.10%
• 10Y*: —

*Multi-year figures are annualized to reflect compound growth (CAGR)

CMPS vs. ATAI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
CMPS COMPASS Pathways plc	83.04%	82.54%	-56.80%	8.97%	-63.67%	-39.57%
ATAI Atai Life Sciences N.V.	-0.98%	207.52%	-5.67%	-46.99%	-65.14%	-63.67%

Correlation

The correlation between CMPS and ATAI is 0.55, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.55
Correlation (3Y) Calculated over the trailing 3-year period	0.54
Correlation (5Y) Calculated over the trailing 5-year period	0.51
Correlation (All Time) Calculated using the full available price history since Jun 18, 2021	0.51

The correlation between CMPS and ATAI has been stable across timeframes, ranging from 0.51 to 0.55 - a consistent structural relationship.

Fundamentals

Market Cap CMPS : $1.65B ATAI : $1.45B
EPS CMPS : -$1.73 ATAI : -$2.67
PB Ratio CMPS : 5.04 ATAI : 7.29
Total Revenue (TTM) CMPS : $0.00 ATAI : $3.49M
Gross Profit (TTM) CMPS : $0.00 ATAI : $3.49M
EBITDA (TTM) CMPS : -$312.16M ATAI : -$663.38M

Return for Risk

CMPS vs. ATAI — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

CMPS

CMPS Risk / Return Rank: 87
CMPS Sharpe Ratio Rank: 85
CMPS Sortino Ratio Rank: 82
CMPS Omega Ratio Rank: 87
CMPS Calmar Ratio Rank: 91
CMPS Martin Ratio Rank: 91

ATAI

ATAI Risk / Return Rank: 67
ATAI Sharpe Ratio Rank: 67
ATAI Sortino Ratio Rank: 70
ATAI Omega Ratio Rank: 69
ATAI Calmar Ratio Rank: 67
ATAI Martin Ratio Rank: 62

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

CMPS vs. ATAI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for COMPASS Pathways plc (CMPS) and Atai Life Sciences N.V. (ATAI). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	CMPS	ATAI	Difference
Sharpe ratio: Return per unit of total volatility	1.69	0.79	+0.90
Sortino ratio: Return per unit of downside risk	2.39	1.68	+0.71
Omega ratio: Gain probability vs. loss probability	1.36	1.21	+0.16
Calmar ratio: Return relative to maximum drawdown	4.55	1.32	+3.22
Martin ratio: Return relative to average drawdown	12.02	2.08	+9.94

CMPS vs. ATAI - Sharpe Ratio Comparison

The current CMPS Sharpe Ratio is 1.69, which is higher than the ATAI Sharpe Ratio of 0.79. The chart below compares the historical Sharpe Ratios of CMPS and ATAI, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

CMPS vs. ATAI - Drawdown Comparison

The maximum CMPS drawdown since its inception was -96.03%, roughly equal to the maximum ATAI drawdown of -95.05%. Use the drawdown chart below to compare losses from any high point for CMPS and ATAI.

Drawdown Indicators

	CMPS	ATAI	Difference
Max Drawdown Largest peak-to-trough decline	-96.03%	-95.05%	-0.98%
Max Drawdown (1Y) Largest decline over 1 year	-38.22%	-48.06%	+9.84%
Max Drawdown (3Y) Largest decline over 3 years	-81.00%	-59.23%	-21.77%
Max Drawdown (5Y) Largest decline over 5 years	-95.20%	-94.66%	-0.54%
Current Drawdown Current decline from peak	-78.67%	-80.71%	+2.04%
Average Drawdown Average peak-to-trough decline	-74.12%	-80.78%	+6.66%
Ulcer Index Depth and duration of drawdowns from previous peaks	16.74%	30.56%	-13.82%

Volatility

CMPS vs. ATAI - Volatility Comparison

COMPASS Pathways plc (CMPS) has a higher volatility of 22.02% compared to Atai Life Sciences N.V. (ATAI) at 20.22%. This indicates that CMPS's price experiences larger fluctuations and is considered to be riskier than ATAI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CMPS	ATAI	Difference
Volatility (1M) Calculated over the trailing 1-month period	22.02%	20.22%	+1.80%
Volatility (6M) Calculated over the trailing 6-month period	67.98%	50.35%	+17.63%
Volatility (1Y) Calculated over the trailing 1-year period	103.39%	81.08%	+22.31%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	80.05%	83.62%	-3.57%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	82.24%	83.63%	-1.39%

Dividends

CMPS vs. ATAI - Dividend Comparison

Neither CMPS nor ATAI has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

Frequently Asked Questions

Can I hold both CMPS and ATAI in my portfolio?

CMPS and ATAI have a correlation of 0.55, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CMPS or ATAI?

CMPS has higher volatility (22.02%) compared to ATAI (20.22%). In terms of maximum drawdown, CMPS dropped -96.03% vs ATAI's -95.05%.

Which has better risk-adjusted returns?

CMPS currently has the higher Sharpe Ratio (1.69 vs 0.79), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.